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Heart urchins from the depths: Corparva lyrida gen. et sp. nov. (Palaeotropidae), and new records for the southwestern Atlantic Ocean
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Flores, Jonathan-N.

; Penchaszadeh, Pablo-E.

; Brogger, Martín-I.

Revista de Biología Tropical

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mar 2021, Volume 69 Suppl. 1 Pages 14 - 33

Abstract: Es En | Text: Es En | PDF: Es | PDF: En

Resumen Introducción: Los erizos de mar del orden Spatangoida son el grupo más diverso de equinoideos recientes. Objetivo: Describir un nuevo género y una nueva especie de Spatangoida de profundidades abisales, y reportar nuevos registros para especies conocidas. Métodos: Los ejemplares fueron recolectados durante varias expediciones a diferentes áreas del Océano Atlántico sudoccidental (OAS), entre las latitudes 37-55° S y abarcando profundidades desde 55 a 3 000 metros. Presentamos análisis morfológicos y de ultraestructura. Resultados: Corparva lyrida gen. et sp. nov. (Palaeotropidae) fue descripta para el cañón submarino Mar del Plata en el talud continental de Argentina (2 950 m de profundidad), el primer registro de esta familia para Argentina. Corparva gen. nov. difiere en tener un sistema apical semi-etmolítico y labrum que llega a la parte posterior de la segunda placa ambulacral adyacente. También informamos la distribución más septentrional y el registro más profundo para Brisaster moseleyi (latitud 38° S, 2 212 m de profundidad), la extensión hacia el norte del rango de distribución de Tripylus excavatus (latitud 39° S, 74 m de profundidad) y el primer registro de Abatus philippii y Abatus agassizii en el Banco Burdwood/AMP Namuncurá. Conclusiones: El presente trabajo aporta datos novedosos y actualizados sobre la diversidad y distribución de erizos de mar espatangoideos del OAS, incluyendo la descripción de C. lyrida gen. et sp. nov., y nuevos registros para especies conocidas. Esto muestra cuánto queda por conocer sobre la diversidad y distribución de los erizos corazón en el OAS, especialmente de las profundidades marinas.

Abstract Introduction: Sea urchins in the order Spatangoida are the most diverse group of extant echinoids. Objective: Describe a new genus and species of Spatangoida from abyssal depths, and add new records for known species. Methods: Specimens were collected during several cruises at different areas of the southwestern Atlantic Ocean (SWAO), among 37-55° S latitude at depths ranging from 55 to 3 000 m. We present morphological and ultrastructure analyses. Results: Corparva lyrida gen. et sp. nov. (Palaeotropidae) is described from the Mar del Plata Canyon on the Argentine continental slope (2 950 m depth), the first record of this family from Argentina. Corparva gen. nov. differs in having an apical system semi-ethmolytic, and labrum reaching to rear part of second adjacent ambulacral plate. We also report the northernmost distribution and deepest record for Brisaster moseleyi (38° S latitude, 2 212 m depth), the northward extension of the distribution range of Tripylus excavatus (39° S latitude, 74 m depth), and the first record of Abatus philippii and Abatus agassizii at the Burdwood Bank/MPA Namuncurá. Conclusions: The present work brings novel and updated data about the diversity and distribution of spatangoids from the SWAO, including the description of C. lyrida gen. et sp. nov., and new records of species. This shows how much remains to be known about the diversity and distribution of heart urchins in the SWAO, especially from the deep-sea.

https://doi.org/10.15517/rbt.v69isuppl.1.46320

Echinoderm diversity in the Southwestern Atlantic
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Martinez, Mariano Ignacio

; Arribas, Lorena Pilar

; Berecoechea, Juan José

; Brogger, Martín Ignacio

; Penchaszadeh, Pablo Enrique

Revista de Biología Tropical

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jun 2015, Volume 63 Suppl. 2 Pages 115 - 120

Abstract: Es En | Text: Es En | PDF: Es | PDF: En

Resumen En los últimos años se han incrementado los estudios sobre la biodiversidad de equinodermos de Latinoamérica. En el presente trabajo, se exponen los resultados sobre muestras obtenidas en tres expediciones a lo largo de la costa argentina (35 - 55º S) y cerca de la Península Antártica. La primera campaña analizada, Mejillón II (M-II; 2009), se llevó acabo entre 35º - 39º S cubriendo profundidades entre 10 y 140 m. La segunda, parte de la Campaña Antártica de Verano 2011 (CAV-III; 2011), tuvo lugar en el área de la Península Antártica, Shetland del Sur e islas Orcadas del Sur (profundidad entre 67 hasta 754 m). La última expedición analizada en este trabajo fue el último tramo de la Campaña Antártica de Verano (CAV-IV; 2011) desde 39º - 55º S y entre 30 - 140 m de profundidad. Como resultado, 74 estaciones fueron estudiadas, en las cuales en 68 se encontró al menos un espécimen del Phylum Echinodermata. Considerando todas las estaciones, el porcentaje de encuentro para cada clase fue Asteroidea (68 %), Echinoidea (64 %), Ophiuroidea (55 %), Holothuroidea (51 %) and Crinoidea (20 %). En la campaña M-II, los equinodermos estuvieron presentes en el 94 % de las estaciones muestreadas, siendo Echinoidea el más frecuente (74 %). En relación a la Campaña CAV-III, los equinodermos estuvieron presentes en todas las estaciones muestreadas; Ophiuroidea fue la clase más representativa en número de estaciones (100 %). El valor más bajo de aparición de equinodermos fue encontrado en la campaña CAV-IV (82 %), donde Asteroidea estuvo presente en el 73 % de las muestras, y los crinoideos estuvieron ausentes.

Abstract Studies of biodiversity of echinoderms from South America have increased in recent years. Here we summarize sampling done on three expeditions along the Argentinean coast (35º - 55º S) and near the Antarctic Peninsula. The first campaign, Mejillón II (M-II; 2009), was carried out between 35º - 39º S and covered a depth range between 10 to 140 m. The second was part of the Summer Antarctic Campaign 2011 (CAV-III; 2011) that took place around the Antarctic Peninsula, South Shetland and South Orkney Islands (depth range between 67 to 754 m). The last cruise was the final stretch of the Summer Antarctic Campaign 2011 (CAV-IV; 2011), from 39º - 55º S and between 30 - 140 m depth. As result, 74 stations have been studied, of which 68 had at least one echinoderm specimen. From the total number of stations, the occurrence percentages for each class were Asteroidea (68 %), Echinoidea (64 %), Ophiuroidea (55 %), Holothuroidea (51 %) and Crinoidea (20 %). In the M-II campaign, echinoderms were presented in 94 % of the sampled stations, with Echinoidea most frequent (74 %). In the CAV-III campaign echinoderms were presented in all the stations; Ophiuroidea were found in all stations. The lowest occurrence of echinoderms was found in the CAV-IV campaign (82 %), where Asteroidea was present in the 73 % of the samples, and crinoids were absent. Rev. Biol. Trop. 63 (Suppl. 2): 115-120. Epub 2015 June 01.

https://doi.org/10.15517/rbt.v63i2.23132 365 downloads

Tooth microstructure and feeding biology of the brittle star Ophioplocus januarii (Echinodermata: Ophiuroidea) from northern Patagonia, Argentina
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Brogger, Martín I.

; Martinez, Mariano I.

; Cadierno, María Pilar

; Penchaszadeh, Pablo E.

Revista de Biología Tropical

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jun 2015, Volume 63 Suppl. 2 Pages 353 - 360

Abstract: Es En | Text: Es En | PDF: Es | PDF: En

Resumen El ofiuroideo Ophioplocus januarii se distribuye a lo largo de las costas de Argentina y Brasil, encontrándose tanto en substratos duros como blandos. En base al análisis de contenidos estomacales y la microestructura de los dientes, junto a observaciones de campo, se describe el comportamiento alimentario de esta especie. Opuesto a suposiciones previas, O. januarii es una especie micrófaga que se alimenta de fragmentos de macroalgas (encontrados en el 60.0 % de los estómagos analizados que presentaban contenido), detritos vegetales (28.0 %), estructuras cuticulares animales (13.0 %) y material inidentificable (30.7 %). Menos frecuente, se encontraron foraminíferos, ostrácodos, un anfípodo, un bivalvo juvenil y otros crustáceos. Pequeñas porciones del material inidentificable fueron analizadas en el microscopio electrónico de barrido, resultando ser material digerido, diatomeas y pequeños apéndices de crustáceos. Así, O. januarii es una especie omnívora, que se alimenta principalmente de algas, complementando su dieta de manera oportunista con otros ítems. Las observaciones de campo revelaron alimentación suspensívora. El análisis de la microestructura del estereoma del diente resultó en un arreglo del tipo fenestrado intermedio, que se encuentra entre los dos tipos de arreglos descriptos hasta ahora, los dientes de tipo uniforme y los compuestos. De estos últimos, el primero ha sido encontrado en especies macrófagas mientras que el segundo se corresponde a ofiuroideos micrófagos. En el presente trabajo, se propone la existencia de un nuevo tipo de arreglo intermedio en la matriz dental de los ofiuroideos.

Abstract Ophioplocus januarii is a common brittle star on soft and hard substrates along the Argentinian and Brazilian coasts. Based on stomach contents, tooth microstructure and field observations we identified its food. Opposed to previous suggestions, O. januarii appears to be a microphagous species feeding on macroalgal fragments (found in 60.0 % of the analyzed stomachs with content), plant debris (28.0 %), animal cuticle structures (13.0 %), and unidentifiable material (30.7 %). Less frequent items found were foraminiferans, ostracods, an amphipod, a juvenile bivalve, and other crustaceans. Electronic microscope revealed digested material, diatoms and small crustacean appendices. Thus, O. januarii is an omnivorous species, feeding mainly on algae, complemented opportunistically with other items. Suspension feeding was observed in the field. It has an fenestrated arrangement intermediate between the previously described uniform and compound teeth. Rev. Biol. Trop. 63 (Suppl. 2): 353-360. Epub 2015 June 01.

https://doi.org/10.15517/rbt.v63i2.23169 613 downloads

Assessment of gonadal follicle size in the invading bivalve Limnoperna fortunei (Mytilidae)
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Guimarey, Pilar

; Darrigran, Gustavo

; Damborenea, Cristina

; Penchaszadeh, Pablo E.

Biocell

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aug 2011, Volume 35 N. 2 Pages 59 - 62

Abstract: En | Text: En | PDF: En

Limnoperna fortunei is an invasive gonochoristic and byssate freshwater bivalve originary from Southeast Asia. It shows great adaptive-reproductive ability, so knowledge of the gonadal cycle is an important factor for the prevention and control of this bioinvasion. This species is highly damaging to natural and human environments. We analyzed the distribution and maturity state of reproductive follicles in the mantle of both male and females. Male results are not shown but, in general, they followed the same pattern as that of females. Routine histological techniques included serial longitudinal sections and transversal sections in three body regions (anterior, middle and psoterior). Oocytes with conspicuous nucleoli were measured on both types of sections to estimate the maturity stage in the different regions. ANOVA indicates that there were no significant differences in maturity ratio between the studied regions, so that a small number of sections would render precise results to assess maturity.

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Aplicación de calceína para la estimación del crecimiento de la almeja amarilla Mesodesma mactroides Reeve, 1854
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Lepore, Mauro L

; Penchaszadeh, Pablo E

; F. Alfaya, José E

; Herrmann, Marko

Revista de biología marina y oceanografía

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dec 2009, Volume 44 N. 3 Pages 767 - 774

Abstract: En Es | Text: En Es | PDF: En | PDF: Es

Growth rates of Mesodesma mactroides were estimated comparing two different methods at the intertidal of the exposed sandy beach Santa Teresita, Argentina. Results of a short tagging-recapture experiment using the in situ fluorescent marking (MFI) method and subsequent size-increment analysis were compared with results from length-frequency distributions (DFT) analysis from a 25 month quantitative sampling. Residuals, derived from MFI method and DFT analysis, were of similar magnitude and distribution, suggesting that both methods are equally appropriate to estimate growth of M. mactroides. Calcein was useful as non-lethal growth marker for M. mactroides, emitting a bright green fluorescence band under blue light.

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Do native grazers from Patagonia, Argentina, consume the invasive kelp Undaria pinnatifida?
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Teso, S. Valeria

; Bigatti, Gregorio

; Casas, Graciela N.

; Piriz, M. Luz

; Penchaszadeh, Pablo E.

Revista del Museo Argentino de Ciencias Naturales

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jun 2009, Volume 11 N. 1 Pages 7 - 14

Abstract: En Es | Text: En Es | PDF: En | PDF: Es

The invasive kelp Undaria pinnatifida (Phaeophyceae, Laminariales) was first reported in Golfo Nuevo in 1992 and since then it has spread widely over more than 170 km, all along the northern Patagonian coast, Argentina. Field observations in the region have indicated the potential role of invertebrate grazers, like the sea urchins Arbacia dufresnii and Pseudechinus magellanicus and the gastropod Tegula patagonica, in controlling algal density. Laboratory experiments were conducted to ascertain whether, and if so, to what extent these grazers actually feed on the algae. The studied sea urchins fed on the alga, whereas the snail scraped off biofouling adhered to its surface. Higher densities of grazers were observed on the kelp during summer and might be attributed to increasing in metabolism with increasing temperature, and degradation of blades and sporophylls, which possibly increase their palatability.

El alga invasora Undaria pinnatifida (Phaeophyceae, Laminariales) fue reportada por primera vez en Golfo Nuevo en 1992, dispersándose ampliamente a lo largo de 170 km de costa en el norte de la Patagonia, Argentina. Observaciones de campo hechas en los erizos de mar Arbacia dufresnii y Pseudechinus magellanicus y en el gasterópodo Tegula patagonica evidenciaron que son posibles consumidores de Undaria pinnatifida en la población local. Se realizaron experimentos de laboratorio con el objetivo de probar si estos pastoreadores eran capaces de consumir el alga. Los erizos de mar estudiados consumen el alga, mientras que el gasterópodo ramonea los epibiontes presentes sobre su superficie. Altas densidades de ramoneadores fueron encontradas sobre el alga durante el verano y podrían ser atribuidas a un aumento del su metabolismo con el aumento de la temperatura y a la degradación de las láminas y esporofilos, lo cual posiblemente aumente la palatabilidad del alga.

316 downloads

Description of the ootheca of Turbinella laevigata (Mollusca, Gastropoda)
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Matthews-Cascon, Helena

; Rocha-Barreira, Cristina de Almeida

; Meirelles, Carlos

; Bigatti, Gregorio

; Penchaszadeh, Pablo

Brazilian Archives of Biology and Technology

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apr 2009, Volume 52 N. 2 Pages 359 - 364

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Turbinella laevigata é encontrada desde a zona entre marés até 40 m de profundidade, sendo endêmica do Brasil onde ocorre desde o Estado do Amapá até o Espírito Santo. O objetivo deste estudo foi descrever a ooteca de Turbinella laevigata. Quinze amostras foram coletadas na Praia de Olho d'Água, Município de Icapuí e na Praia de Flexeiras, Município do Trairí, ambos no Estado do Ceará, Nordeste do Brasil, foram estudadas. As desovas de T. laevigata foram compostas por 15 +/- 1.4 SD cápsulas e mediram 63 +/- 6.4 SD mm de comprimento e 41 +/- 2.5 SD mm de largura. Todas as cápsulas estavam fixadas pela membrana basal, a qual tinha a extremidade modificada para se prender ao substrato. Elas possuem uma superfície concava e outra convexa, apresentando margens pregueadas, que se prolongavam até a membrana basal, à qual se uniam formando uma prega. Esta espécie aparentemente produz uma grande quantidade de ovos nutritivos. A concha dos juvenis mediu 6.4 +/- 0.7 SD mm de comprimento e apresentou uma protoconcha com 3 voltas.

Turbinella laevigata is found since the intertidal zone up to 40 m depth, being endemic of Brazil where it occurs from the state of Amapá to the state of Espirito Santo. The objective of this study was to describe the ootheca of this species. Fifteen samples collected in the Olho d'Água Beach, City of Icapuí and Fleixeiras Beach, City of Trairí, both in Ceará State, Northeast Brazil, were studied. The spawns were composed by 15 +/- 1.4 SD capsules and had 63 +/- 6.4 SD mm of length with 41 +/- 2.5 SD mm of width. They had a convex and a concave surface, and plaited edges that drew out until the basal membrane, to which they joined forming a medial ridge. This species apparently produced a high amount of nurse eggs. The early juveniles measured 6.4 +/- 0.7 SD mm of length and they presented a protoconch with three whorls.

3036 downloads

Imposex in endemic volutid from Northeast Brazil (Mollusca: Gastropoda)
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Castro, Ítalo Braga de

; Meirelles, Carlos Augusto Oliveira de

; Matthews-Cascon, Helena

; Rocha-Barreira, Cristina de Almeida

; Penchaszadeh, Pablo

; Bigatti, Gregório

Brazilian Archives of Biology and Technology

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oct 2008, Volume 51 N. 5 Pages 1065 - 1069

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

O imposex caracteriza-se pelo surgimento de estruturas sexuais masculinas, em fêmeas de gastrópodes. Cerca de 120 espécies de moluscos que exibem o fenômeno quando expostas a contaminação por compostos orgânicos de estanho tais como o Tributilestanho (TBT) e o Trifenilestanho (TPT). Esses compostos são utilizados, sobretudo em embarcações, no intuito de evitar a bioincrustração que danifica as embarcações e eleva os custos das viagens marítimas. No Brasil se conhecem 5 espécies de moluscos gastrópodes que manifestam imposex, são elas: Stramonita haemastoma, Stramonita rustica, Leucozonia nassa, Cymathium parthenopeum e Olivancillaria vesica. No Nordeste, monitoramentos da contaminação por organoestânicos foram realizados utilizando o imposex em gastrópodes como biomarcador. O presente estudo tem por objetivo notificar a primeira ocorrência de imposex na espécie endêmica do Nordeste brasileiro, Voluta ebraea. De um total de 11 animais observados, duas fêmeas apresentaram imposex, provenientes da Praia do Pacheco no litoral do Ceará. Observou-se nesses indivíduos a presença de glândula de cápsulas, ovidutos e receptáculo seminal concomitantemente ao pênis o que caracteriza o imposex. Como o imposex só se manifesta em moluscos expostos a compostos organoestânicos tipicamente encontrados em portos, marinas, estaleiros e locais com grande fluxo de embarcações atribui-se a origem dessa contaminação provavelmente a um estaleiro localizado nas proximidades da área de coleta.

Imposex is characterized by the development of masculine sexual organs in neogastropod females. Almost 120 mollusk species are known to present imposex when exposed to organic tin compounds as tributyltin (TBT) and triphenyltin (TPT). These compounds are used as biocide agents in antifouling paints to prevent the incrustations on boats. Five gastropod species are known to present imposex in Brazil: Stramonita haemastoma, Stramonita rustica, Leucozonia nassa, Cymathium parthenopeum and Olivancillaria vesica. This paper reports the first record of imposex observed in the endemic gastropod Voluta ebraea from Pacheco Beach, Northeast Brazil. Animals presenting imposex had regular female reproductive organs (capsule gland, oviduct and sperm-ingesting gland) and an abnormal penis. As imposex occurs in mollusks exposed to organotin compounds typically found at harbors, marinas, shipyards and areas with high shipping activities, probably contamination of Pacheco Beach is a consequence of a shipyard activity located in the nearest areas.

4916 downloads Cited 1 time in SciELO

Redescription of Hiatella meridionalis d'Orbigny, 1846 (Mollusca, Bivalvia, Hiatellidae) from Argentina
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Simone, Luiz Ricardo L.

; Penchaszadeh, Pablo E.

Papéis Avulsos de Zoologia

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2008, Volume 48 N. 14 Pages 119 - 127

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

A redescrição de Hiatella meridionalis (d’Orbigny, 1846) é realizada como primeiro passo na melhoria da sistemática do gênero das regiões atlântica e pacífica oeste. Esta re-análise é baseada em espécimes coletados nas vizinhanças da localidade tipo e em morfologia detalhada de amostras que alguns pesquisadores consideram pertencer a uma única espécie de ampla distribuição. Dos caracteres anatômicos, os mais interessantes são: uma grande quantidade de papilas no sifão inalante; o músculo retrator dos sifões dividido em duas porções; o tamanho pequeno dos palpos; um anel muscular transversal no estomago; e um padrão em zigzag no curto intestino. Estes caracteres distinguem a espécie dos demais hiatelídeos até então examinados. Os sintipos da espécie foram também examinados e pela primeira vez ilustrados; o lectótipo é designado.

The redescription of Hiatella meridionalis (d’Orbigny, 1846) is provided as first attempt to improve the systematics of the genus in the regions of Atlantic and western Pacific. This reanalysis is based on specimens collected in the vicinity of the type localities and is based on detailed morphology of samples that some researches consider a single, wide ranging species. From the morphological characters, the more interesting are: a high quantity of papillae at incurrent siphon; the retractor muscles of siphon divided in two bundles; the small size of the palps; the muscular ring in the stomach; and the zigzag fashion of the short intestinal loops. These characters distinguish the species from the other hiatellids so far examined. Type material of the species was examined, by first time illustrated, and the lectotype is designated.

2478 downloads

10.

PERSPECTIVES OF MARINE BIODIVERSITY STUDIES IN ARGENTINA
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Lutz, Vivian A

; Boschi, Enrique E

; Bremec, Claudia S.

; Cousseau, María Berta

; Figueroa, Daniel E.

; Rodríguez, Diego H.

; Scarlato, Norberto

; Viñas, María Delia

; Lewis, Mirtha N.

; Penchaszadeh, Pablo E.

; Acuña, Fabián H

; Aguirre, Marina L.

; Akselman, Rut

; Alder, Viviana A.

; Baldoni, Ana

; Barría, María S.

; Bastida, Ricardo O.

; Boraso, Alicia S.

; Calvo, Jorge

; Campagna, Claudio

; Cañete, Guillermo

; Cassia, María C.

; Cervellini, Patricia M.

; Chiaramonte, Gustavo E.

; Costagliola, Marcela

; Cosulich, Guillermina

; Daponte, María C.

; Díaz de Astarloa, Juan M.

; Elías, Rodolfo

; Esnal, Graciela B.

; Excoffon, Adriana C.

; Freije, Hugo

; García de la Rosa, Susana

; Genzano, Gabriel N.

; Giberto, Diego A.

; Guerrero, Raúl

; Helbling, Walter

; Hoffmeyer, Mónica S.

; Incorvaia, Inés S.

; Iribarne, Oscar

; Jaureguizar, Andrés J.

; Kogan, Mariela

; Lovrich, Gustavo A

; Madirolas, Adrián O.

; Martin, Juan P.

; Martos, Patricia

; Mendoza, María L.

; Marque, Silvina Menu

; Mianzán, Hermes W.

; Morriconi, Elba R.

; Negri, Rubén M.

; Obenat, Sandra

; Pastor de Ward, Catalina T.

; Pérez de Fankhauser, Laura B.

; Quintana, Flavio

; Reta, Raúl

; Rico, Rita

; Roux, Ana M.

; Sabatini, Marina E.

; Scelzo, Marcelo A.

; Schejter, Laura

; Schiavini, Adrián C.M.

; Silva, Ricardo I.

; Silvoni, María G.

; Spivak, Eduardo

; Trucco, María I.

; Vallarino, Eduardo A.

; Zelaya, Diego G.

Gayana (Concepción)

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2003, Volume 67 N. 2 Pages 371 - 382

Abstract: En | Text: En | PDF: En

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11.

Programa caricomp: Monitoreo a largo plazo de los ecosistemas marinos del parque nacional morrocoy, Venezuela
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Bone, David

; Cróquer, Aldo

; Klein, Eduardo

; Pérez, Daisy

; Losada, Freddy

; Martín, Alberto

; Bastidas, Carolina

; Rada, Martín

; Galindo, Lorena

; Penchaszadeh, Pablo

Interciencia

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oct 2001, Volume 26 N. 10 Pages 457 - 462

Abstract: Es En Pt | Text: Es En Pt | PDF: Es | PDF: En | PDF: Pt

Se reportan los resultados recabados durante la ejecución del programa CARICOMP (Caribbean Coastal Marine Productivity). Este programa tiene como objetivo principal estudiar la estructura y funcionamiento de los tres principales ecosistemas costeros del Caribe: bosques de manglares, praderas de fanerógamas marinas y arrecifes coralinos. En estos estudios participan actualmente más de 12 laboratorios de nueve países caribeños, formando un red de centros integrados. En Venezuela el programa está representado por la Fundación La Salle y por el INTECMAR (USB), instituto que ha monitoreado rutinariamente estos ambientes en el Parque Nacional Morrocoy durante casi una década, desde 1992 hasta el presente. Así, se han registrado variables fisicoquímicas y biológicas en varias localidades, determinándose la estructura, composición y productividad de estos sistemas marinos. Esta información permite establecer comparaciones con los datos obtenidos por los otros laboratorios, proporcionando una base de datos local y regional lo suficientemente robusta como para documentar (a largo plazo) respuestas de umbral de estos ecosistemas a los cambios globales, incluyendo impactos humanos y cambios climáticos.

The data collected during almost a decade by the CARICOMP (Caribbean Coastal Marine Productivity) program at Morrocoy National Park are presented The aim of this program is to study the structure and function of the three principal Caribbean coastal ecosystems: man-groves, seagrass beds and coral reefs. Currently, more than 12 marine laboratories from 9 countries participate in the network. Since 1992, the program has been executed in Venezuela by Fundación la Salle in Isla Margarita and INTECMAR (USB) in Parque Nacional Morrocoy. In the latter, INTECMAR has carried out routine monitoring of environmental and biological variables in several localities, in order to characterize the structure, composition and productivity of these marine ecosystems. The information aims to establish comparisons with the data collected by other laboratories, making possible to build a robust data base for understanding long-term threshold responses of these ecosystems to global changes, human impacts and climate changes.

Os resultados coletados são informados durante a execução do programa CARICOMP (Caribbean Coastal Marine Productivity). Este programa tem como objetivo principal estudar a estrutura e funcionamento dos três principais ecossistemas costeiros do Caribe: bosques de mangues, pradarias de fanerógamas marinhas e recifes coralinos. Nestes estudos participam atualmente mais de 12 laboratórios de nove países caribenhos, formando uma rede de centros integrados. Na Venezuela o programa está representado pela Fundação La Salle e pelo INTECMAR (USB), instituto que há observado rotineiramente estes ambientes no Parque Nacional Morrocoy durante quase uma década, desde 1992 até o presente. Assim, se registraram variáveis fisicoquímicas e biológicas em várias localidades, determinando-se a estrutura, composição e produtividade destes sistemas marinhos. Esta informação permite estabelecer comparações com os dados obtidos pelos outros laboratórios, proporcionando uma base de dados local e regional muito grande para documentar (a longo prazo) respostas de umbral destes ecossistemas às mudanças globais, incluindo impactos humanos e mudanças climáticas.

470 downloads Cited 6 times in SciELO

12.

Interaccion trofica entre dos estrellas de mar (Astropecten riensis y Tethyaster vestitus) en Golfo Triste, Venezuela
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Bitter, Ricardo A.

; Molinet, Ricardo

; Penchaszadeh, Pablo E.

Boletim do Instituto Oceanográfico

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1980, Volume 29 N. 2 Pages 61 - 63

Abstract: En Es | Text: En Es | PDF: En | PDF: Es

This research has been done on the basis of samples obtained at depths between 21 and 63m by trawling in Golfo Triste. The stomach content of 153 specimens of Tethyaster vestitus and 981 specimens of Astiopecten riensis were analyzed. A.riensis seems to be an important element within the trophic structure of the community under study, constituting the second and third level of consumers. T.verstitus is, within the above-mentioned community one of the rare constitiuents of the 4th level consumers despite the fact that it takes part in the 3rd level as well.

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