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Assessment of aquatic macro-invertebrates communities and water quality parameters of River Zhob, Balochistan, Pakistan
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Karim, A.

; Hafeeza, B.

; Riaz, S.

; Khwaja, S.

; Shahzad, M. M.

; Akhter, A.

Brazilian Journal of Biology

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2024, Volumen 84 elocation e265234

Resumen: Pt En | Texto: Pt En | PDF: Pt | PDF: En

Resumo O estresse ambiental causado pela poluição é frequentemente avaliado pela diversidade de espécies de macroinvertebrados em habitats aquáticos específicos. Para descobrir as flutuações sazonais em várias comunidades de macroinvertebrados e diferentes parâmetros de qualidade da água do rio Zhob, foi realizado um teste de pesquisa no rio Zhob, Baluchistão. Amostras de macroinvertebrados e água foram retiradas de quatro estações diferentes do rio Zhob. Um total de 18 táxons de vários macroinvertebrados foram identificados na área. O filo Arthropoda constitui 94,8% da população total, seguido por Mollusca (3,6%) e Annelida (1,4%). Um grande número de artrópodes pertencia à ordem Diptera (1148), enquanto a ordem Trichoptera ocupava o segundo lugar em número de macroinvertebrados (441). Os números máximos de macroinvertebrados foram observados no mês de janeiro. Todos os parâmetros físico-químicos do rio Zhob, como temperatura do ar, temperatura da água, pH, oxigênio dissolvido (OD) e sólidos dissolvidos totais (TDS), estavam dentro da faixa, adequada para o crescimento saudável de macroinvertebrados. Populações diversificadas de vários macroinvertebrados confirmam boas condições ecológicas do ambiente e da água no local estudado, especialmente a ampla concentração de DO no rio. Os dados documentados sobre macroinvertebrados no local estudado fornecerão uma linha de base para pesquisas futuras.

Abstract Environmental stress caused by pollution is often assessed by diversity of macro-invertebrate species in specific aquatic habitat. To find out seasonal fluctuations in various macro-invertebrates communities and different water quality parameters of River Zhob, a research trial was conducted on River Zhob, Balochistan. Samples of macro-invertebrates and water were taken from four different stations of River Zhob. A total 18 taxa of various macro-invertebrates were identified from the area. Phylum Arthropoda constitute 94.8% of the total population followed by Mollusca (3.6%) and Annelida (1.4%). A large number of arthropods were belonged to order Diptera (1148), while the order Trichoptera was stood second with respect to macro-invertebrate´s number (441). The maximum numbers of macro-invertebrates were observed in the month of January. All physico-chemical parameters of River Zhob such as air temperature, water temp, pH, dissolved oxygen (DO) and total dissolved solids (TDS) were within the range, suitable for the healthy growth of macro-invertebrates. Diversified populations of various macro-invertebrates confirm good ecological condition of environment and water in the studied site especially ample concentration of DO in River. The documented data on macro-invertebrates in studied site will provide a baseline for future research.

https://doi.org/10.1590/1519-6984.265234

Reproductive biology of Donax striatus (Linnaeus, 1758) (Mollusca: Bivalvia) on Gado Bravo Beach, municipality of Tibau do Norte, state of Rio Grande do Norte, Brazil Linnaeus, Linnaeus (Linnaeus 1758 Mollusca (Mollusca Bivalvia Beach Norte 175 17 1
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Pereira, J. N.

; Martins, I. X.

; Barreira, C. A. Rocha

; Oliveira, M. F.

; Silva, G. B.

Brazilian Journal of Biology

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2024, Volumen 84 elocation e282016

Resumen: Pt En | Texto: Pt En | PDF: Pt | PDF: En

Resumo Aspectos da biologia reprodutiva de Donax striatus foram estudados. Os indivíduos foram coletados mensalmente de fevereiro de 2021 a janeiro de 2022 na praia Gado Bravo, no município de Tibau do Norte, estado do Rio Grande do Norte, Brasil. Donax striatus é uma espécie dióica sem dimorfismo macroscópico externo (na concha) ou interno (gônadas). Assim, é necessário um exame microscópico das células reprodutivas. Para a caracterização dos estágios de desenvolvimento gonadal e determinação do tamanho na primeira maturidade sexual (L50), 30 espécimes foram selecionados mensalmente entre fevereiro de 2021 e janeiro de 2022 e submetidos ao processamento histológico. O índice de Condição (IC) de cada indivíduo foi estimado e as variações mensais foram estatisticamente avaliadas. O tamanho de primeira maturação (L50) foi estimado em 14,2 mm de comprimento de concha. Para promover a conservação da espécie, recomenda-se a captura de indivíduos maiores que 14,2 mm. Os menores índices de condição foram encontrados na estação seca, com maior ocorrência de organismos em fase de eliminação e exibindo reorganização do tecido gonadal. Índices maiores foram encontrados no período chuvoso, com presença de indivíduos maduros. A natureza contínua da gametogênese em Donax stritatus reflete a influência das chuvas na região. Machos e fêmeas apresentam pico de eliminação de gametas com pausas durante o ano, mas com presença de indivíduos em maturação e eliminação ao longo do ano. Como a mariscagem visando Donax striatus é excessiva na Praia de Gado Bravo, no estado do Rio Grande do Norte, espera-se que os resultados do presente estudo possam contribuir para o estabelecimento de medidas de manejo da atividade e estratégias de conservação da espécie. estudados 202 Bravo Norte Brasil concha gônadas. gônadas . (gônadas) Assim reprodutivas L50, L50 L , 3 histológico IC (IC avaliadas (L50 142 14 2 14, recomendase recomenda se seca chuvoso maduros região ano esperase espera 20 (gônadas L5 (L5 1 (L

Abstract Aspects of the reproductive biology of Donax striatus were studied from individuals collected from Gado Bravo Beach in the municipality of Tibau do Norte, state of Rio Grande do Norte, Brazil. Donax striatus is a dioic species without external (on the shell) or internal (gonads) macroscopic dimorphism. Thus, a microscopic examination of the reproductive cells is necessary. For the characterization of the gonadal development stages and determination of the size at first sexual maturity (L50), 30 specimens were selected monthly between February 2021 and January 2022 and submitted to histological processing. The condition index (CI) of each individual was estimated and monthly variations were statistically assessed. The size at first maturity (L50) was estimated to be 14.2 mm in shell length. To foster conservation of the species, catches of individuals larger than 14.2 mm is recommended. The lowest condition indices were found in the dry season, with a greater occurrence of organisms in the elimination stage and exhibiting gonad tissue reorganization. Higher indices were found in the rainy season, with the presence of mature individuals. The continuous nature of gametogenesis in Donax stritatus reflects the influence of rainfall in the region. Males and females have peak gamete elimination with pauses during the year, but with the presence of maturing and eliminating individuals throughout the year. As shellfish gathering targeting Donax striatus is excessive on Gado Bravo Beach in the state of Rio Grande do Norte, it is hoped that the results of the present study can contribute to the establishment of management measures for the activity and conservation strategies for the species. Norte Brazil gonads (gonads dimorphism Thus necessary L50, L50 L , 3 202 processing CI (CI assessed (L50 142 14 2 14. length recommended season reorganization region year L5 20 (L5 1 (L

https://doi.org/10.1590/1519-6984.282016

Notes on Kora and description of a new species from Minas Gerais, Southeast Brazil (Mollusca: Gastropoda: Stylommatophora) Gerais Mollusca (Mollusca Gastropoda Stylommatophora
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Pena, Meire Silva

Zoologia (Curitiba)

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2024, Volumen 41 elocation e23059

Resumen: En | Texto: En | PDF: En

ABSTRACT Kora Simone, 2012, currently includes three species known only by shell morphology. They are distributed in the states of Bahia and Minas Gerais in central Brazil, where they occur in association with limestone outcrops. Features used to identify them include micro-ornamentation of the protoconch, color pattern, and morphometric data. This paper expands the characterization of the genus through the description of the internal anatomy of two of its species. These features also distinguish a new species, which is described herein. Material was collected manually during several field expeditions to Parque Nacional Cavernas do Peruaçu in northern Minas Gerais. Total height and maximum width, and height and width of the aperture, were measured; the number of whorls determined; and staining patterns typified. The digestive and reproductive systems and pallial complex were characterized for Kora rupestris Salvador & Simone, 2016 and Kora arnaldoi sp. nov., which are distinguished by the latter possessing a protoconch with a smooth first ½ whorl, a more tapered profile, a jaw with 18 folds, a buccal bulb with a short radular core, and a fertilization complex with only one tubular fold. The two species share a very peculiar pattern of radula teeth compared to other genera of the family, given that they are rupicolous but do not live inside caves. Diagnostic knowledge of the genus was expanded. Simone 2012 morphology Brazil outcrops microornamentation micro ornamentation data herein aperture measured determined typified 201 sp nov nov. whorl profile 1 folds core fold family caves expanded 20 2

https://doi.org/10.1590/s1984-4689.v41.e23059

Biodiversity of macroalgae-associated invertebrates in the marine protected area of Alcatrazes archipelago, southeastern Brazil macroalgaeassociated macroalgae associated archipelago
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Vicente, Vanessa Silva

; Longo, Pedro Augusto dos Santos

; Mansur, Karine Ferreira Ribeiro

; Serrano, Helena

; Batistão, Alan Rodrigo

; Leite, Fosca Pedini Pereira

Biota Neotropica

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2024, Volumen 24 Nº 2 elocation e20241610

Resumen: Pt En | Texto: Pt En | PDF: Pt | PDF: En

Resumo Este estudo descreve e ilustra a biodiversidade de macroinvertebrados associados a habitats de macroalgas pardas marinhas dos gêneros Sargassum e Dictyota no Arquipélago de Alcatrazes, a maior Área Marinha Protegida (AMP) do estado de São Paulo, sudeste do Brasil. As assembleias foram amostradas durante os verões de 2018, 2019 e 2020 e no inverno de 2018 em dois locais na ilha principal. As macroalgas contendo a fauna associada foram coletadas a aproximadamente 10 metros de profundidade, com seis amostras em cada local e em cada campanha amostral. Frondes de Sargassum predominaram nas coletas de verão, enquanto estiveram ausentes nas campanhas de inverno, quando Dictyota foram predominantes. Entre os invertebrados, 32 espécies foram encontradas exclusivamente nos meses de verão, associadas aos bancos de Sargassum, enquanto 12 espécies foram registradas apenas na coleta de inverno, em associação com Dictyota. No total, foram identificadas 91 espécies, pertencentes a 60 famílias, 19 ordens, 7 classes e 3 filos, incluindo Arthropoda (Malacostraca e Pycnogonida), Mollusca (Gastropoda, Bivalvia e Polyplacophora) e Echinodermata (Ophiuroidea e Echinoidea). Das 91 espécies encontradas, 73 espécies são novos registos para a área marinha do arquipélago de Alcatrazes, revelando assim a expressiva biodiversidade de invertebrados que vivem em associação com bancos de macroalgas naquela área ainda pouco explorada. Nenhuma diferença significativa de diversidade de espécies foi encontrada entre os dois locais de Alcatrazes. Além disso, foram encontrados poucos exemplares de duas espécies invasoras: Perna perna (Mollusca: Bivalvia) e Ophiothela mirabilis (Echinodermata: Ophiuroidea), o que ressalta a importância do monitoramento de diferentes habitats dentro das AMPs para verificar possíveis alterações na fauna ao longo dos anos. Até onde sabemos, este é o primeiro inventário ilustrado da fauna de macroinvertebrados associados a algas marinhas no Arquipélago de Alcatrazes, uma das maiores AMPs da costa brasileira; além de desvendar a sua notória biodiversidade, pode servir de referência para futuro monitoramento da diversidade costeira local. Alcatrazes AMP (AMP Paulo Brasil 201 202 principal 1 profundidade amostral verão predominantes total 9 6 famílias ordens filos Malacostraca Pycnogonida, Pycnogonida , Pycnogonida) Gastropoda, Gastropoda (Gastropoda Polyplacophora Ophiuroidea Echinoidea. Echinoidea . Echinoidea) explorada disso invasoras (Mollusca (Echinodermata Ophiuroidea, Ophiuroidea) anos sabemos brasileira 20 2

Abstract This study describes and illustrates the biodiversity of macroinvertebrates associated to Sargassum and Dictyota seaweed habitats in the Alcatrazes archipelago, the largest Marine Protected Area (MPA) in the state of São Paulo, southeast Brazil. Assemblages were sampled during the summers of 2018, 2019 and 2020 and winter of 2018 at two sites on the main island. Macroalgae containing the associated fauna were collected at approximately 10 meters deep, with six samples at each site and in each sampling campaign. Sargassum fronds prevailed during summer collections, whilst were absent in the winter campaigns, when Dictyota was the most frequent seaweed. Among invertebrates, 32 species were exclusively found on summer months, associated to Sargassum beds, while 12 species were only registered on winter collection, in association with Dictyota. In total, 91 species were identified, belonging to 60 families, 19 orders, 7 classes and 3 phyla, including Arthropoda (Malacostraca and Pycnogonida), Mollusca (Gastropoda, Bivalvia and Polyplacophora), and Echinodermata (Ophiuroidea and Echinoidea). Among the 91 species found, 73 species are new records for the Alcatrazes archipelago marine area, thus revealing the expressive invertebrate biodiversity living in association with macroalgae beds in that area, which has still been little explored. No significant difference in species diversity was found between the two sites of Alcatrazes. In addition, few specimens of two invasive species were found: Perna perna (Mollusca: Bivalvia) and Ophiothela mirabilis (Echinodermata: Ophiuroidea), which underscores the importance of monitoring different habitats within MPAs to check for possible changes in the fauna over the years. As far as our knowledge, this is the first illustrated inventory of the seaweed-associated macroinvertebrate fauna within the Alcatrazes Archipelago, one of the largest MPAs in the Brazilian coast; besides unravelling its notorious biodiversity, this can act as a reference for future monitoring of local coastal diversity. MPA (MPA Paulo Brazil 201 202 island 1 deep campaign collections campaigns invertebrates months collection total 9 identified 6 families orders phyla Malacostraca Pycnogonida, Pycnogonida , Pycnogonida) Gastropoda, Gastropoda (Gastropoda Polyplacophora, Polyplacophora Polyplacophora) Ophiuroidea Echinoidea. Echinoidea . Echinoidea) area explored addition (Mollusca (Echinodermata Ophiuroidea, Ophiuroidea) years knowledge seaweedassociated Archipelago coast 20 2

https://doi.org/10.1590/1676-0611-bn-2024-1610

Cave-dwelling gastropods of Brazil: a reply to Ferreira et al. (2023) Cavedwelling Cave dwelling Brazil al 2023 (2023 202 (202 20 (20 2 (2 (
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Salvador, Rodrigo B.

; Silva, Fernanda S.

; Cavallari, Daniel C.

; Cunha, Carlo M.

; Bichuette, Maria E.

Zoologia (Curitiba)

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2024, Volumen 41 elocation e23099

Resumen: En | Texto: En | PDF: En

ABSTRACT In 2022, we published an article in this journal entitled “Cave-dwelling gastropods (Mollusca: Gastropoda) of Brazil: state of the art and conservation”. In that study, we compiled all the available information about cave-dwelling gastropods in the country, including terrestrial and freshwater species. We focused on the troglobites but also included information regarding some troglophilic species that we deemed worthy of discussion. In 2023, Ferreira et al. also in this journal, raised concerns regarding our article. We respond to their observations here. 2022 Cavedwelling Cave dwelling Mollusca (Mollusca Gastropoda Brazil conservation. conservation . conservation” study cavedwelling cave country discussion 2023 al here 202 20 2

https://doi.org/10.1590/s1984-4689.v41.e23099

Expansion of Sinotaia quadrata (Mollusca: Gastropoda: Architaenioglossa: Viviparidae) in two major rivers from Argentina Mollusca (Mollusca Gastropoda Architaenioglossa Viviparidae
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GREGORIC, DIEGO E. GUTIÉRREZ

; LUCÍA, MICAELA DE

; TORRES, SANTIAGO H.

; COPA, JORGE L. E.

; SÁNCHEZ, NOELIA C.

; DARRIGRAN, GUSTAVO

Anais da Academia Brasileira de Ciências

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2024, Volumen 96 Nº 2 elocation e20231280

Resumen: En | Texto: En | PDF: En

Abstract Invasive non-native freshwater mollusks are a growing concern in South America, with 16 species already recorded in the region. Among them, Sinotaia quadrata has only been documented in Argentina, for the first time in the Punilla Valley, Córdoba (2009) and La Plata, Buenos Aires (since 2015). In this study, we report the presence of S. quadrata in two additional areas, the Río de la Plata River and a stream (unnamed) in the Paraná River basin, two of the most significant rivers in South America, located in the provinces of Buenos Aires and Entre Ríos, respectively. These new records confirm the invasive nature of this species, which has also been identified in Europe, the United States, and Africa in recent years. The findings of this study highlight the need for continued monitoring and management of invasive species in South America’s freshwater ecosystems. nonnative non native America 1 region them Argentina Valley 2009 (2009 since 2015. 2015 . 2015) S areas unnamed (unnamed basin Ríos respectively Europe States years Americas s ecosystems 200 (200 201 20 (20 2 (2 (

https://doi.org/10.1590/0001-3765202420231280

La sintiencia de los invertebrados de los phyla Mollusca, Arthropoda y Nematoda utilizados en experimentación, como argumento para vigilar su bienestar
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Espinosa López, Ameli Karla

; Téllez Ballesteros, Elizabeth Eugenia

Revista de filosofía Universidad Iberoamericana

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Dic 2023, Volumen 55 Nº 155 Paginas 96 - 154

Resumen: En Es | Texto: En Es | PDF: En | PDF: Es

Abstract Vertebrate animals used in experimental protocols are recognized as sentient, promoting their consideration within zooethic consideration, their protection in national and international legislation, and their welfare. This has led researchers to resort to other models, such as some invertebrate animals. However, except in particular cases, invertebrates do not have the same legal protection nor welfare provision because they are not recognized as sentient. A review of scientific articles (from 1997 to 2022) was carried out that examined sentience between the Mollusca, Arthropoda and Nematoda, phyla widely used as experimental models. Eighteen articles were found that confirmed a certain degree of sentience in these phyla. Therefore, we propose they should be included in the zooethical consideration. In addition, this text constitutes a first effort to promote the well-being of these individuals used in experimental procedures.

Resumen Los vertebrados usados en protocolos experimentales son reconocidos como sintientes, lo cual favorece su consideración desde la zooética, su protección en la legislación nacional e internacional, así como la salvaguarda de su bienestar. En consecuencia, se ha recurrido a otros modelos in vivo como los animales invertebrados para realizar investigación. Salvo casos particulares, los invertebrados no cuentan con la protección legal ni existe preocupación por su bienestar, en tanto que se les consideraba no sintientes. Por lo tanto, se realizó una revisión de artículos científicos (de 1997 a 2022) para examinar la sintiencia entre los grupos Mollusca, Arthropoda y Nematoda, phyla ampliamente utilizados como modelos experimentales. Se encontraron dieciocho artículos que constataron un cierto grado de sintiencia en estos phyla, por lo que se propone su inclusión en la reflexión zooética. Este texto constituye un primer esfuerzo para procurar el bienestar de estos individuos utilizados en procedimientos experimentales.

https://doi.org/10.48102/rdf.v55i155.186

Estructura poblacional del ostión americano Crassostrea virginica (Gmelin, 1791) (Mollusca: Bivalvia: Ostreidae) en Tamaulipas, México
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Balderas-Mancilla, Ulises de Jesus

; Azuara-Domínguez, Ausencio

; Vázquez-Ochoa, Luis Antonio

; Pérez-Arriaga, Edgar

; Rodríguez-Castro, Jorge Homero

Hidrobiológica

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Dic 2023, Volumen 33 Nº 3 Paginas 317 - 327

Resumen: En Es | Texto: En Es | PDF: En | PDF: Es

ABSTRACT Background. In Tamaulipas, Mexico, the Eastern oyster, Crassostrea virginica, is one of the most commercially important species. Goals. The population structure of C. virginica in the Tigre River and Laguna de San Andres in the State of Tamaulipas, Mexico, was determined. Methods. Oysters were collected from three banks from January to December 2022 using the quadrat-based method. The size structure (length, width, and weight), instar distribution, weight-length relationship, abundance, and biomass of C. virginica were determined. Results. In total, 2,277 organisms were collected. The representative size, in the three banks, occurred in a range of 43-65 mm in length. Significant differences were recorded in the width, length, and weight of the oysters collected, with Bank 1 and 2 organisms having the greatest length and weight. The three banks presented negative allometric growth when establishing a b value <3. No significant statistical difference was recorded in the number of recruits between the banks. A statistically significant difference was observed between banks in the average number of juveniles-preadults, adults, and adults with more than one reproductive. The abundance on the banks is below the established minimum number (> 200 oysters/m2). There is inadequate management of the resource on the three banks, where most oysters captured are below the size allowed for extraction. Conclusions. The structure shows that most of the C. virginica population is below the size allowed for its extraction, which is why the development of studies focused on the sustainable management of this species is suggested.

RESUMEN Antecedentes. En Tamaulipas, México, el ostión Crassostrea virginica es una de las especies de mayor importancia comercial. Objetivos. Se determinó la estructura poblacional de C. virginica en el Río Tigre y en la Laguna de San Andrés del Estado de Tamaulipas, México. Métodos. Se recolectaron ostiones en tres bancos de enero a diciembre del 2022, mediante el método basado en cuadrantes. Se determinó la estructura de tallas (largo, ancho y peso), distribución de estadios, relación peso-longitud, la abundancia y biomasa de C. virginica. Resultados. En total se recolectaron 2,277 organismos. La talla representativa, en los tres bancos en conjunto se presentó en un intervalo de 43-65 mm de largo. Se registraron diferencias significativas en el ancho, largo y peso de los ostiones recolectados, siendo los organismos del Banco 1 y 2 de mayor longitud y peso. Los tres bancos presentaron un crecimiento alométrico negativo al establecerse un valor b <3. En el número de reclutas entre los bancos no se registró diferencia estadística significativa. Se observó una diferencia estadística significativa entre los bancos en el número promedio de juveniles-preadultos, adultos y adultos con más de una reproducción. La abundancia en los bancos está por debajo del número mínimo establecido (> 200 ostras/m2). Se presenta inadecuado manejo del recurso en los tres bancos, donde la mayor parte capturada de ostiones se encuentra por debajo de la talla permitida para su extracción. Conclusión. La estructura de tallas muestra que la mayor parte de la población capturada de C. virginica se encuentra por debajo de la talla permitida para su extracción, por lo que se sugiere el desarrollo de estudios enfocados al manejo sustentable de esta especie.

https://doi.org/10.24275/krxh8653

Molecular Phylogenetics of Physa acuta (Pulmonata: Basommatophora): an Invasive species in Central Punjab Pakistan
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Ansari, B.

; Altafa, J.

; Ramzan, A.

; Ahmed, Z.

; Khalil, S.

; Qamar, S. U. R.

; Awan, S. A.

; Jehangir, K.

; Khalid, R.

; Aziz, S.

; Sultana, T.

; Sultana, S.

; Alsamadany, H.

; Alshamrani, R.

; Awan, F. S.

Brazilian Journal of Biology

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2023, Volumen 83 elocation e246984

Resumen: Pt En | Texto: Pt En | PDF: Pt | PDF: En

Resumo Os físidos pertencem à classe Gastropoda; pertencem ao filo Mollusca e, sendo bioindicadores, hospedeiros intermediários de parasitas e pragas, ocupam uma posição-chave no ecossistema. Existem três espécies do gênero Physa, ou seja, P. fontinalis, Physa acuta e P. gyrina em corpos d’água do Punjab Central e foram caracterizadas com base em marcadores moleculares. Alto nível de diversidade genética foi revelado por RAPD polimórfico, no entanto os marcadores SSR não foram amplificados. A análise multivariada revelou polimorfismo variando de 9,09% a 50% entre as três espécies de Physid. Um número total de 79 loci foi observado para as três espécies em estudo e 24 loci foram observados como polimórficos. Esses fragmentos RAPD podem ser desenvolvidos em marcadores codominantes (SCAR) por clonagem e podem ser posteriormente sequenciados para o desenvolvimento de marcadores específicos da espécie Physa para identificar as espécies introduzidas e nativas no Paquistão.

Abstract Physids belong to Class Gastropoda; belong to Phylum Mollusca and being bioindicators, intermediate hosts of parasites and pests hold a key position in the ecosystem. There are three species of Genus Physa i.e. P. fontinalis, Physa acuta and P. gyrina water bodies of Central Punjab and were characterized on the basis of molecular markers High level of genetic diversity was revealed by polymorphic RAPD, however SSR markers were not amplified. The multivariate analysis revealed polymorphism ranging from 9.09 percent to 50 percent among the three Physid species. Total number of 79 loci were observed for the three species under study and 24 loci were observed to be polymorphic. These RAPD fragment(s) can be developed into co dominant markers (SCAR) by cloning and can be further sequenced for the development of the Physa species specific markers to identify the introduced and native species in Pakistan.

https://doi.org/10.1590/1519-6984.246984 168 descargas

10.

Characterization of the species of genus Physa on the basis of typological species concept from Central Punjab
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Aziz, S.

; Altaf, J.

; Ramzan, A.

; Ahmed, Z.

; Qamar, S. U. R.

; Awan, S. A.

; Khalil, S.

; Jehangir, K.

; Khalid, R.

; Ansari, B.

; Sultana, T.

; Sultana, S.

; Alsamadany, H.

; Alshamrani, R.

; Awan, F. S.

Brazilian Journal of Biology

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2023, Volumen 83 elocation e246934

Resumen: Pt En | Texto: Pt En | PDF: Pt | PDF: En

Resumo Os físidos pertencem à classe Gastropoda; o filo Mollusca possui importante posição na teia alimentar e atua como bioindicador, praga e hospedeiro intermediário. Por serem resistentes, são chamadas baratas de malacologia. Os caramujos físidos foram coletados em diferentes corpos d’água de Faisalabad (Punjab) e identificados até as espécies por meio de marcadores morfológicos. A morfometria dos corpos de prova foi realizada com auxílio de paquímetro digital Vernier em milímetros (mm) por meio de medida linear dos caracteres da casca. A análise de regressão linear da razão AL / SW vs. AL e razão SL / SW vs. AL indicou que o crescimento alométrico existe apenas em Physa acuta quando comparado com P. gyrina e P. fontinalis. Este estudo levará a avaliar a situação das espécies de físido no Punjab Central. A análise do componente principal mostra que o componente 1 (comprimento da casca) e o componente 2 (largura da casca) são os componentes mais prolíficos e quase 80% da identificação. A distância entre P. acuta e P. fontinalis é 5,4699, P. acuta e P. gyrina é 7,6411, P. fontinalis e P. gyrina é 16,6080, mostrando que P. acuta se assemelha a P. fontinalis, e ambos os espécimes não se parecem com P. gyrina. P. acuta é uma espécie invasora e apresenta bioatividade, tornando-se uma candidata potente para substâncias bioativas.

Abstract Physids belong to Class Gastropoda; Phylum Mollusca have important position in food web and act as bio indicators, pests and intermediate host. Being resistant these are called cockroaches of malacology. Physid snails were collected from different water bodies of Faisalabad (Punjab) and were identified up to species using morphological markers. The morphometry of the specimens was carried out with the help of a digital Vernier caliper in millimeters (mm) using linear measurement of shell characters. Linear regression analysis of the AL/SW ratio vs AL and SL/SW ratio vs AL indicated that allometric growth exists only in Physa acuta when compared with P.gyrina and P. fontinalis. This study will lead to assess the status of the Physid species in Central Punjab. The Principal component analysis shows that the Component 1 (Shell Length) and component 2 (Shell Width) are the most prolific components and nearly 80 percent of the identification. The distance between P. acuta and P. fontinalis is 5.4699, P. acuta and P. gyrina is 7.6411, P. fontinalis and P. gyrina is 16.6080 showing that P. acuta resembles with P. fontinalis, and both these specimens donot resemble with P. gyrina. P.acuta is an invasive species and shows bioactivity making it a potent candidate for bioactive substances.

https://doi.org/10.1590/1519-6984.246934 148 descargas

11.

Continental mollusks from the Olmos Formation (Upper Cretaceous), Coahuila, Mexico
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Centeno-González, Naylet K.

; Zúñiga-Bermúdez, Gerardo

; Estrada-Ruiz, Emilio

; Vega, Francisco J.

Boletín de la Sociedad Geológica Mexicana

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2023, Volumen 75 Nº 3 elocation e140723

Resumen: Es En | Texto: Es En | PDF: Es | PDF: En

RESUMEN Se describen moluscos de agua dulce de la Formación Olmos (Campaniano) del Cretácico Superior. Como resultado se obtuvieron varios ejemplares de moluscos, identificando dos familias de gasterópodos: Viviparidae (Viviparus sp.) y Physidae (Mesolanistes sp.), y tres familias de bivalvos: Limidae (Pseudolimea sp.), Unionidae (Proparreysia sp., Unio sp., Unionelloides? sp., Plesielliptio sp. y Ostreidae (Ostrea sp.). A partir de este reconocimiento taxonómico, así los restos de flora associados, fue posible obtener una interpretación preliminar del ambiente donde vivieron estos moluscos. La interpretación del paleoambiente es semejante a los cuerpos de agua dulce adyacentes a un sistema estuarino. Además, la mezcla de ejemplares de ambientes salobres y de agua dulce sugiere que algunos moluscos sufrieron transporte en un ambiente transicional de agua dulce a estuarino en la Formación Olmos durante el Campaniano.

ABSTRACT We describe freshwater mollusks from the Olmos Formation, Campanian, Upper Cretaceous. The results were obtained from several specimens of mollusks, identified with two families of gastropods: Viviparidae (Viviparus sp.) and Physidae (Mesolanistes sp.), and three families of bivalves: Limidae (Pseudolimea sp.), Unionidae (Proparreysia sp., Unio sp., Unionelloides? sp., Plesielliptio sp., and Ostreidae (Ostrea sp.). Based on this taxonomic recognition, along with the associated fossil flora, it was possible to get a preliminary of the environment where the mollusks lived. The interpretation of the paleoenvironment resemble freshwater bodies adjacent to an estuarine system. Furthermore, the mixing of specimens of brackish and freshwater environments is indicative of a transport of some of these mollusks. The general view of the paleoenvironment where the mollusks inhabited is that of a transitional freshwater-estuarine in the Olmos Formation during Campanian times.

https://doi.org/10.18268/bsgm2023v75n3a140723

12.

Does dredging activity exert an influence on benthic macrofauna in tropical estuaries? Case study on the northern coast of Brazil estuaries
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Sousa, Lorena K. S.

; Cutrim, Marco V. J.

; Nogueira Júnior, Miodeli

; Oliveira, Verônica M. de

Iheringia. Série Zoologia

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2023, Volumen 113 elocation e2023009

Resumen: En | Texto: En | PDF: En

ABSTRACT The aim of the present study was to investigate the effect of dredging activities on the structure of the macrobenthic community of a port complex in São Luís do Maranhão (2°S, Brazil). Sampling was performed on four occasions: pre-dredging, dredging 1 (25% of the material dredged), dredging 2 (75% of the material dredged) and post-dredging. Total mean density was 430.8 ± 55.0 ind/m², with 147.76 ± 280.82 ind/m² at pre-dredging, 161.90 ± 285.67 ind/m² at dredging 1, 53.83 ± 72.15 ind/m² at dredging 2 and 67.29 ± 72.58 ind/m² after dredging, revealing a reduction during dredging 2. The most representative groups were Polychaeta, Oligochaeta, Crustacea and Mollusca. Lumbrineris sp. (Polychaeta) was present in all sampling periods and was the dominant species. Richness and Shannon diversity of the species were higher in the pre-dredging and post-dredging periods, with reductions during the dredging activities (dredging 1 and 2). Principal component analysis revealed a correlation with granulometry and heavy metals in the sediment. The dredging activities led to a reduction in the macrobenthic community. Moreover, post-dredging recovery was insufficient for the recovery of the community. 2°S, 2S S (2°S Brazil. Brazil . Brazil) occasions predredging, predredging pre 25% 25 (25 dredged, dredged , 75% 75 (75 postdredging. postdredging post dredging. 4308 430 8 430. 550 55 0 55. indm² indm ind m² m 14776 147 76 147.7 28082 280 82 280.8 ind/m 16190 161 90 161.9 28567 285 67 285.6 5383 53 83 53.8 7215 72 15 72.1 6729 29 67.2 7258 58 72.5 Polychaeta Oligochaeta Mollusca sp (Polychaeta 2) sediment Moreover 2°S (2 7 (7 43 5 1477 14 147. 2808 28 280. 1619 16 9 161. 2856 6 285. 538 53. 721 72. 672 67. 725 ( 4

https://doi.org/10.1590/1678-4766e2023009

13.

Cave-dwelling gastropods (Mollusca: Gastropoda) of Brazil, state of the art and conservation: a critical review Cavedwelling Cave dwelling Mollusca (Mollusca Gastropoda Brazil conservation
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Ferreira, Rodrigo Lopes

; Souza-Silva, Marconi

; Zampaulo, Robson de Almeida

Zoologia (Curitiba)

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2023, Volumen 40 elocation e22057

Resumen: En | Texto: En | PDF: En

ABSTRACT In 2022, Salvador and co-authors published an up-to-date list of gastropod species recorded from Brazilian caves. That list included 18 species (15 land and three freshwater species) that were considered by the authors to be restricted to caves (troglobitic). In this contribution we argue that only six of the species listed by them as truly troglobites can be classified in that category. We disagree with some characteristics listed by Salvador and co-authors to diagnose the species they classify as cave-restricted and argue that those species do not have truly troglomorphic traits (characteristic of subterranean habitats). Since the Brazilian legislation considers the degree of association with caves as a decisive attribute to preserve them, it is important to clarify the characteristics are sufficient and necessary for a species to be classified as cave-dependent. 2022 coauthors co uptodate up date 1 15 (1 troglobitic. troglobitic . (troglobitic) category caverestricted cave characteristic habitats. habitats habitats) cavedependent. cavedependent dependent. dependent cave-dependent 202 ( (troglobitic 20 2

https://doi.org/10.1590/s1984-4689.v40.e22057

14.

New records of teratology in Chiton cumingsii and Chiton granosus (Mollusca: Polyplacophora) from the Peruvian coast Mollusca (Mollusca Polyplacophora
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Cardich-Becerra, Luz

; Mendivil, Alejandro

; Cardoso, Franz

Papéis Avulsos de Zoologia

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2023, Volumen 63 elocation e202363036

Resumen: En | Texto: En | PDF: En

Abstract This paper presents the first teratological records for Peruvian waters of Chiton cumingsii Frembly, 1827 and Chiton granosus Frembly, 1827, both species very common in the Southeast Pacific. We found five abnormal individuals in C. cumingsii, and two in C. granosus, including the first recorded splitting abnormalities for these species. An individual of C. cumingsii with a new insertion plate in the tail valve was also observed. We observed that splitting abnormalities in Polyplacophora can be classified as perfect or imperfect, depending on whether the splitted valves are clearly recognized as individual fragments or not. Coalescence between the splitted valves seems to be a common phenomenon, and this coalescence can be homogeneous or heterogeneous. As both species show a combination of hypomerism, coalescence and splitting, we suggest that they are probably interrelated and represent an attempt of the developmental mechanisms of chitons to overcome a valve malformation. Frembly 182 Pacific C imperfect not phenomenon heterogeneous hypomerism malformation 18 1

https://doi.org/10.11606/1807-0205/2023.63.036

15.

How many species of Mollusca are there in Brazil? A collective taxonomic effort to reveal this still unknown diversity Brazil
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Machado, Fabrizio M.

; Miranda, Marcel S.

; Salvador, Rodrigo B.

; Pimenta, Alexandre D.

; Côrtes, Mariana O.

; Gomes, Jaime A.J.

; Miyahira, Igor C.

; Agudo-Padrón, Ignacio

; Oliveira, Cléo D.C.

; Caetano, Carlos H.S.

; Coelho, Paulo R.S.

; D’Ávila, Sthefane

; Arruda, Eliane P. de

; Almeida, Sérgio M. de

; Gomes, Suzete R.

; Alvim, Juliana

; Galvão-Filho, Hilton

; L. Ferreira-Júnior, Augusto

; Marques, Rodrigo C.

; Martins, Inês

; Souza, Leonardo S. de

; Arruda, Janine O.

; Cavallari, Daniel C.

; Santos, Sonia B. dos

; Pedro, Natan C.

; Salles, Anna C. de A.

; Dornellas, Ana P.S.

; Lima, Tarcilla C. de

; Amaral, Vanessa S. do

; Silva, Fernanda S.

; Passos, Flávio D.

; Thiengo, Silvana S.

; Leite, Tatiana S.

; Simone, Luiz R.L.

Zoologia (Curitiba)

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2023, Volumen 40 elocation e23026

Resumen: En | Texto: En | PDF: En

ABSTRACT The expression ‘you need to know to conserve’ is a well-known cliche among biologists. Documenting the richness of a group of organisms is the first step towards understanding biodiversity and preparing efficient conservation plans. In this context, many efforts have been made to quantify the number of species on Earth and estimate the number of species still unknown to science. A few countries have complete and integrated databases estimating the approximate number of species recorded for their territory, particularly in the Global South. In Brazil, a country of continental dimensions, revealing the richness of the second most diverse clade of invertebrates (=Mollusca) has been a goal of taxonomists. Recently, in an unprecedented, collective, and integrated effort among Brazilian malacologists, it was possible to estimate how many valid species of molluscs are there in Brazil. In this effort, more than 30 mollusc experts joined together to update the Taxonomic Catalogue of the Brazilian Fauna (TCBF), a governmental website that allows a quick and real-time updating of all Metazoan. So far, more than 5,000 updates have been made in TCBF, indicating the presence of 3,552 valid species of molluscs in Brazil, distributed among the main clades as follows: Caudofoveata (10 spp.), Solenogastres (6 spp.), Polyplacophora (35 spp.), Scaphopoda (43 spp.), Cephalopoda (92 spp.), Bivalvia (629 spp.) and Gastropoda (2,737 spp.). The present study, in addition to demonstrating for the first time the richness of Brazilian molluscs, also presents the state of the art of this important phylum of invertebrates highlighting its most representative and neglected groups. you conserve wellknown well known biologists plans context science territory South Brazil dimensions =Mollusca Mollusca (=Mollusca taxonomists Recently unprecedented collective malacologists 3 TCBF , (TCBF) realtime real Metazoan far 5000 5 000 5,00 3552 552 3,55 follows 10 (1 spp., spp spp. 6 ( 35 (3 43 (4 92 (9 629 (62 2,737 2737 2 737 (2,73 spp.. . study groups (TCBF 500 00 5,0 355 55 3,5 1 4 9 62 2,73 273 73 (2,7 50 0 5, 3, 2,7 27 7 (2, 2, (2

https://doi.org/10.1590/s1984-4689.v40.e23026

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