ABSTRACT The aim of this study was the use of starter concentrate and litter fences in lactating guinea pigs until weaning (15 days). The treatments were: TI, Conventional concentrate (CC) and without litter fence; Control; TII, CC + litter fence; TIII, CC + start concentrate + litter fence. Body weight gain, feed intake and mortality at weaning were evaluated. Nine 1 m2 pits with 5 females and 1 male per pit and litter fences (triangular shape with an area of 0.125 m2) were used (TII and TIII) where clay feeders for the starting concentrate were located (20% protein and 2781 kcal/kg of digestible energy). The conventional (commercial) concentrate for mothers provided 18.7% protein and 2888 kcal/kg of digestible energy. The body weight gain at weaning was 10.3, 9.5 and 9.3 g/d for T I, II and III, respectively, with no significant difference between them. The consumption of concentrate of the offspring was similar between TII (19.4 g/d) and TIII (18.4 g/d) and the percentage of mortality at weaning was 11,5, 13.9 and 8.0% for T I, II and III, respectively.

RESUMEN El objetivo del presente trabajo fue estudiar el uso de concentrado de inicio y cercas gazaperas en cuyes lactantes hasta el deteste (15 días). Los tratamientos fueron: TI, Concentrado convencional (CC) y sin cerca gazapera; Control; TII, CC + cerca gazapera; TIII, CC + concentrado de inicio + cerca gazapera. Se evaluó la ganancia de peso, consumo de alimento y mortalidad al destete. Se utilizaron nueve pozas de 1 m2 con 5 hembras y 1 macho por poza y con cercas gazaperas (forma triangular con un área de 0.125 m2) en su interior (TII y TIII) donde se ubicaron comederos de arcilla para el concentrado de inicio (20% de proteína y 2781 kcal/kg de energía digestible). El concentrado convencional (comercial) para los adultos aportó 18.7% de proteína y 2888 kcal/kg de energía digestible. La ganancia de peso al destete fue de 10.3, 9.5 y 9.3 g/d para T I, II y III, respectivamente, sin diferencia significativa entre ellos. El consumo de concentrado de las crías fue similar entre TII (19.4 g/d) y TIII (18.4 g/d) y el porcentaje de mortalidad al destete fue 11.5, 13.9 y 8.0% para T I, II y III, respectivamente.

RESUMO O ácido docosahexaenóico (DHA) é o ácido graxo ômega-3 mais importante e menos disponível na dieta humana ocidental. Atualmente, a fonte de ácidos graxos poliinsaturados de cadeia longa ômega-3 (LC-PUFA) depende principalmente da pesca extrativista, tornando esse recurso insustentável em um futuro próximo. Nos últimos anos, uma alta taxa de biossíntese e acúmulo de DHA foi descoberta em uma espécie de água doce (Chirostoma estor) pertencente à família Atherinopsidae. Deste modo, surgiu o interesse em avaliar a composição de ácidos graxos em outros membros da família. Portanto, este estudo compila dados originais da composição de carne de oito espécies de aterinopsídeos de ambientes de água doce e salobra, selvagens ou cultivadas. Altos níveis de DHA (16 a 31%) foram encontrados em todos os membros da família analisados, exceto em C. grandocule, independentemente de seu habitat ou origem. As espécies analisadas do grupo Jordani (C. estor, C. promelas e C. humboldtianum) apresentaram altos níveis de DHA e EPA baixos (<0,5%), como relatado anteriormente para C. estor cultivado. O baixo nicho trófico desses aterinopsídeos e sua capacidade de acumulação de ácidos graxos são fatores que tornam essas espécies notáveis candidatas à aquicultura sustentável.

ABSTRACT Docosahexaenoic acid (DHA) is the most critical and least available omega-3 fatty acid in the Western human diet. Currently, the source of omega-3 long chain polyunsaturated fatty acids (LC-PUFA) is mainly dependent on wild fisheries, making this resource unsustainable in the foreseeable future. In recent years, a high rate of biosynthesis and accumulation of DHA has been discovered in a freshwater species (Chirostoma estor) belonging to the Atherinopsidae family. Interest in evaluating fatty acid composition in other members of the family has emerged, so this study compiles original data of flesh composition of eight atherinopsid species from freshwater and brackish environments, either wild or cultured. High levels of DHA (16 to 31%) were found in all analyzed members of the family, except in C. grandocule, independently of their habitat or origin. The analyzed species of the Jordani group (C. estor, C. promelas and C. humboldtianum) showed high DHA and low EPA levels (<0.5%) as previously reported for cultured C. estor. The low trophic niche of these atherinopsids and their fatty acid accumulation capabilities are factors that make these species noteworthy candidates for sustainable aquaculture.

Objectives. To determine blood-lead (Pb) levels in pregnant women and neonates in a metallurgical city of Peru. Materials and methods. A cross-sectional study was carried out, the population of which consisted of pregnant women who had lived for at least two years in the city of La Oroya, at the time when the lead, copper and zinc foundries operated normally. A blood sample was obtained from the pregnant women before delivery and, after delivery, from the neonate’s umbilical cord and placenta. Lead levels in those samples were measured by graphite furnace atomic absorption spectrophotometry. Pearson’s squared regressions and correlations were determined. Results. Forty normal deliveries were studied. The average blood lead levels in the mother, umbilical cord and placenta were 27.4 ± 15.6 ug/dL; 19.0 ± 12.6 ug/dL and 319.0 ± 215.9 ug/100 g, respectively. 67.5% of the neonates registered levels higher than 10 ug/dL. Pb levels in the umbilical cord accounted for 69.4% of Pb level in maternal blood. The correlation coefficients between Pb levels in maternal blood and umbilical cord, maternal blood and placenta, and placenta and umbilical cord were 0.36; 0.48 and 0.33, respectively. Conclusions. At the time the foundry operated, pregnant women and newborns had high blood lead concentrations. Pb concentrations in the placenta and umbilical cord had moderate correlation with the Pb levels in maternal blood. Pb levels in maternal blood and umbilical cord were 1.5 times as high as in more distant areas

Objetivos. Determinar los niveles de plomo (Pb) en gestantes y neonatos en la ciudad de La Oroya, Perú. Materiales y métodos. Se realizó un estudio transversal. La población estuvo conformada por gestantes residentes durante al menos dos años en la ciudad de La Oroya, cuando operaban normalmente las fundiciones de Pb, cobre y zinc. Se obtuvo muestras de sangre de la gestante antes del parto y luego del parto se tomaron muestras de placenta y sangre del cordón umbilical. El nivel de Pb de dichas muestras fue evaluado por espectrometría de absorción atómica con horno de grafito. Se determinaron regresiones cuadráticas y correlaciones de Pearson. Resultados. Se evaluó cuarenta partos normales. Los niveles promedio de Pb en la sangre materna, cordon umbilical y placenta fueron 27,4 ± 15,6 ug/dL; 19,0 ± 12,6 ug/dL y 319,0 ± 215,9 ug/100 g, respectivamente. El 67,5% de los neonatos tuvieron más de 10 ug/dL de Pb. El nivel de Pb de la sangre del cordón umbilical representó el 69,4% del nivel de Pb en sangre materna. Los coeficientes de correlación entre el Pb de la sangre materna y cordón umbilical, sangre materna y placenta, placenta y sangre del cordón umbilical fueron 0,36; 0,48 y 0,33, respectivamente. Conclusiones. Cuando funcionaba la fundición, las gestantes y recién nacidos tenían concentraciones elevadas de Pb en sangre. Las concentraciones de Pb en la placenta y cordón umbilical tuvieron una correlación moderada con el Pb de la sangre materna. El Pb de la sangre materna y cordón umbilical fue 1,5 veces más alto que los de zonas más alejadas

Objectives. To determine blood-lead (Pb) levels in pregnant women and neonates in a metallurgical city of Peru. Materials and methods. A cross-sectional study was carried out, the population of which consisted of pregnant women who had lived for at least two years in the city of La Oroya, at the time when the lead, copper and zinc foundries operated normally. A blood sample was obtained from the pregnant women before delivery and, after delivery, from the neonate’s umbilical cord and placenta. Lead levels in those samples were measured by graphite furnace atomic absorption spectrophotometry. Pearson’s squared regressions and correlations were determined. Results. Forty normal deliveries were studied. The average blood lead levels in the mother, umbilical cord and placenta were 27.4 ± 15.6 ug/dL; 19.0 ± 12.6 ug/dL and 319.0 ± 215.9 ug/100 g, respectively. 67.5% of the neonates registered levels higher than 10 ug/dL. Pb levels in the umbilical cord accounted for 69.4% of Pb level in maternal blood. The correlation coefficients between Pb levels in maternal blood and umbilical cord, maternal blood and placenta, and placenta and umbilical cord were 0.36; 0.48 and 0.33, respectively. Conclusions. At the time the foundry operated, pregnant women and newborns had high blood lead concentrations. Pb concentrations in the placenta and umbilical cord had moderate correlation with the Pb levels in maternal blood. Pb levels in maternal blood and umbilical cord were 1.5 times as high as in more distant areas

Objetivos. Determinar los niveles de plomo (Pb) en gestantes y neonatos en la ciudad de La Oroya, Perú. Materiales y métodos. Se realizó un estudio transversal. La población estuvo conformada por gestantes residentes durante al menos dos años en la ciudad de La Oroya, cuando operaban normalmente las fundiciones de Pb, cobre y zinc. Se obtuvo muestras de sangre de la gestante antes del parto y luego del parto se tomaron muestras de placenta y sangre del cordón umbilical. El nivel de Pb de dichas muestras fue evaluado por espectrometría de absorción atómica con horno de grafito. Se determinaron regresiones cuadráticas y correlaciones de Pearson. Resultados. Se evaluó cuarenta partos normales. Los niveles promedio de Pb en la sangre materna, cordon umbilical y placenta fueron 27,4 ± 15,6 ug/dL; 19,0 ± 12,6 ug/dL y 319,0 ± 215,9 ug/100 g, respectivamente. El 67,5% de los neonatos tuvieron más de 10 ug/dL de Pb. El nivel de Pb de la sangre del cordón umbilical representó el 69,4% del nivel de Pb en sangre materna. Los coeficientes de correlación entre el Pb de la sangre materna y cordón umbilical, sangre materna y placenta, placenta y sangre del cordón umbilical fueron 0,36; 0,48 y 0,33, respectivamente. Conclusiones. Cuando funcionaba la fundición, las gestantes y recién nacidos tenían concentraciones elevadas de Pb en sangre. Las concentraciones de Pb en la placenta y cordón umbilical tuvieron una correlación moderada con el Pb de la sangre materna. El Pb de la sangre materna y cordón umbilical fue 1,5 veces más alto que los de zonas más alejadas

Objective: To compare the triglyceride lowering effect of gemfibrozil against that of Sacha Inchi oil in Rattus rattus var albinus. Materials and Methods: Thirty-six animals were used. They were divided in two experimental groups (GE1 and GE2) and a control group (CG). The animals underwent a conditioning stage for two weeks, afterwards they were fed with fat-rich meals; and later, the animals from the two experimental groups received Sacha Inchi oil and gemfibrozil, respectively. Serum triglyceride levels were measured at the beginning of the trial, after receiving the fat-rich food and after one and two weeks receiving the test drugs. Results: Serum triglyceride levels had 45,57%, 44,83%, and 27,24% reductions in GE1, GE2 and CG groups, respectively, after two weeks receiving the test drugs. The mean difference of triglyceride values in GE1 and GE2 groups after one and two weeks receiving the test drugs was highly significant compared with values measured after receiving the fat-rich meals; and the difference between the experimental groups and the control group after two weeks using the test drugs was also significant, and the results obtained in the GE1 and GE2 groups were homogeneous (p= 0,600). Conclusion: Sacha Inchi oil showed a triglyceride lowering effect which was similar inefficacy to that of gemfibrozil in Rattus rattus var albinus, after one and two weeks using the test products.

Objetivo: Comparar efectos hipotrigliceridemiantes entre gemfibrozilo y aceite de Sacha Inchi en Rattus rattus var albinus. Materiales y Método: Se utilizaron 36 especímenes, los cuales fueron divididos al azar en 2 grupos experimentales (GE1 y GE2) y un grupo control (GC). Fueron sometidos a etapa de acondicionamiento por 2 semanas, luego alimentación rica en grasa por 2 semanas; posteriormente se administró aceite de Sacha Inchi y gemfibrozilo a GE1 y GE2, respectivamente. Se midieron los niveles de triglicéridos séricos en etapa basal, post-alimentación rica en grasa y tratamiento a una y dos semanas. Resultados: Disminución de niveles de triglicéridos séricos en GE1, GE2 y GC a dos semanas de tratamiento, de 45,57 %; 44,83% y 27,24% respectivamente. Diferencia de medias para GE1 y GE2 a una y dos semanas de tratamiento en relación a medias de valores postalimentación rica en grasa, fue muy altamente significativa; y diferencia entre grupos experimentales y GC a dos semanas de tratamiento fue significativa, con homogeneidad entre GE1 y GE2 (p=0,600). Conclusión: El aceite de Sacha Inchi demostró efectos hipotrigliceridemiantes, con eficacia similar al gemfibrozilo, en Rattus rattus var albinus, a una y dos semanas de tratamiento.

The quantification of chemistry components in different varieties of garlics, are an important factor to differentiate and to select the cultivars with the best chemistry characteristics in prevention of specific diseases. Our work of investigation quantified the levels of total phenols, fructans, pyruvic acid (pungency) and pH. The cultivars Cincomesino E1C2, Barranquino early E1C5, Mapuri E1C6, Alfa Suquia E1C4, Pata de Perro E1C7, Barranquino Late E1C3, were evaluated after of 40 day dried them, the analytic unit was of ten cloves for sample. The levels of total phenols, pyruvic acid (pungency), fructans and pH rank variation 0,307-0,626 mg GAE/g fresh sample, 16,13-22,50 g of fructans/100 g fresh sample, 55,13-86,21 μmol of Pyruvic acid/g fresh sample, 6,01-6,10. The cultivars E1C3 show more concentration of total phenols (0,626 GAE/g fresh sample), the cultivars Mapuri E1C6 show more concentration of fructans (22,50 g of fructans/100 g fresh sample), and the cultivars Pata de Perro E1C7 show more concentration pyruvic acid (86,21 μmol de pyruvic acid/g fresh sample).

La cuantificación de los compuestos químicos en las diferentes variedades de ajos son un factor importante para poder seleccionar los cultivares con mejores características químicas para la prevención de enfermedades. Nuestro trabajo de investigación cuantificó los niveles de fenoles totales, fructanos, ácido pirúvico (pungencia) y pH. Los cultivares Cincomesino E1C2, Barranquino precoz E1C5, Mapuri E1C6, Alfa suquia E1C4, Pata de perro E1C7, Barranquino tardío E1C3, fueron evaluados después de 40 días de secado, la unidad analítica consistió de 10 dientes por muestra. Los niveles de fenoles totales, fructanos, ácido pirúvico (pungencia) y pH varían en un rango de 0,307-0,626 mg GAE/g de muestra fresca, 16,13-22,50 g de fructanos/100 g de muestra fresca, 55,13-86,21 μmol de αcido pirϊvico/g de muestra fresca, 6,01-6,10. El cultivar Barranquino tardío E1C3 exhibe la mayor concentración de fenoles totales (0,626 GAE/g de muestra fresca); el cultivar Mapuri E1C6 presenta la mayor concentración de fructanos (22,50 g de fructanos/100 g de muestra fresca); el cultivar Pata de Perro E1C7 presenta la mayor concentración de ácido pirúvico (86,21 μmol de ácido pirúvico/g de muestra fresca).

Spatial and temporal structure of fish larvae associations and their relationship to the environmental variability were studied at Bahía Chamela, Jalisco, and Santiago-Manzanillo complex, Colima, during 2001-2002. Two spatial aggregations were found, related to the coastal physiography and to the adult habitat. The first was observed at Bahía Chamela, which integrated a combination of species belonging to coastal, demersal and inshore habitats (Bregmaceros bathymaster, Bairdiella sp., Cynoscion sp., Engraulis mordax, and Labrisomidae type 1) and the other in Santiago-Manzanillo composed by species from lagoon and inshore areas (Eucinostomus sp., Abudefduf troschelii, Haemulidae type 2 and 3, and Enneanectes sexmaculatus). Temporal organization was influenced by the environmental shift between two periods (warm and temperate) defined by the regional environmental variability. The warm period was characterized by tropical species (Harengula thrissina, Eucinostomus sp., Auxis sp., and Haemulidae type 3), related to high temperature and rainfall, while temperate period was dominated by species with a tropical-subtropical affinity (B. bathymaster, Bairdiella sp., Cynoscion sp., and £ mordax) and related to lower temperature and elevated nutrients, chlorophyll a and plankton concentrations.

Se analizó la influencia de los factores ambienta les sobre las asociaciones espacio-temporales de larvas de peces frente a Bahía Chamela, Jalisco y el conjunto de bahías Santiago-Manzanillo, Colima, durante un ciclo anual (2001-2002). Se identificaron dos agrupaciones relacionadas con la fisiografía de la costa y el hábitat de los adultos, una frente a Bahía Chamela integrada por una mezcla de especies de hábitats costero, demersal e intermareal-submareal (Bregmaceros bathymaster, Bairdiella sp., Cynoscion sp., Engraulis mordax y Labrisomidae tipo 1) y otra en Santiago-Manzanillo compuesta por especies de origen lagunar e intermareal-submareal (Eucinostomus sp., Abudefduf troschelii, Haemulidae tipos 2 y 3, así como Enneanectes sexmaculatus). La organización temporal estuvo influenciada por la alternancia entre dos periodos (cálido y templado) definidos por la variabilidad ambiental regional. El periodo cálido estuvo caracterizado por especies principalmente tropicales (Harengula thrissina, Eucinostomus sp., Auxis sp. y Haemulidae tipo 3), relacionadas con una mayor temperatura y precipitación pluvial, en cambio durante el periodo templado dominaron las especies de afinidad tropical-subtropical (B. bathymaster, Bairdiella sp., Cynoscion sp. y E. mordax), relacionadas con una menor temperatura e incrementos en las concentraciones de nutrimentos, clorofila-a y zooplancton.