RESUMO

The objective of this study was to describe the morphology and morphometry of saggitta otoliths of Polydactylus virginicus, Menticirrhus cuiaranensis and Conodon nobilis in a tropical environment. Fishes were caught with rod and reel in competitive fishing events promoted in 2014-2015 along the coast of Sergipe. A total of 174 pairs of sagitta otoliths of P. virginicus, 181 of M. cuiaranensis and 77 of C. nobilis was extracted. In general, the sagitta otoliths of all three species analyzed here presented different morphology and shape indices. The permutational multivariate analysis of variance (PERMANOVA) demonstrated significant differences among species and ontogenetic phases within each species using morphometry and shape indices. The linear discriminant analysis (LDA) presented a 98.3% correct reclassification of the otoliths by species.(AU)

Assuntos

RESUMO

Abstract The objective of this study was to describe the morphology and morphometry of saggitta otoliths of Polydactylus virginicus, Menticirrhus cuiaranensis and Conodon nobilis in a tropical environment. Fishes were caught with rod and reel in competitive fishing events promoted in 2014-2015 along the coast of Sergipe. A total of 174 pairs of sagitta otoliths of P. virginicus, 181 of M. cuiaranensis and 77 of C. nobilis was extracted. In general, the sagitta otoliths of all three species analyzed here presented different morphology and shape indices. The permutational multivariate analysis of variance (PERMANOVA) demonstrated significant differences among species and ontogenetic phases within each species using morphometry and shape indices. The linear discriminant analysis (LDA) presented a 98.3% correct reclassification of the otoliths by species.

RESUMO

Based on the paratype of Bledius caribbeanus, its distribution is corrected, not occurring in Brazil, and its morphology is compared to B. hermani; two new Bledius species from the coast of Brazil are described; B. externus is redescribed and here for the first time recorded in Brazil and the key to identification of Brazilian coastal Bledius is updated.

Assuntos

RESUMO

In this study both population and reproductive aspects of the Palaemon pandaliformis caught with trap in a subtropical salt marsh were analyzed. Monthly samplings were carried out from July 2008 through August 2009. Higher abundances were registered along warmer months (October to January) and were negatively related to water salinity. This population was dominated by females, which were larger and heavier than males. Ovigerous females were caught from September through March, with higher incidence in December. Fecundity ranged from 27 to 393 eggs (mean: 217 ± 74 eggs female-1) and has better correlation with weight than female length. The observed characteristics for P. pandaliformis inhabiting this saltmarsh such as seasonal patterns in both abundance and reproductive period are consistent with those expected by subtropical and temperate populations. However, the sampling method effects need to be evaluated.

Nesse estudo foram analisados aspectos populacionais e reprodutivos de Palaemon pandaliformis, capturado com auxílio de armadilhas numa marisma subtropical. Amostragens mensais foram realizadas de julho de 2008 a agosto de 2009. As maiores abundâncias foram observadas durante os meses mais quentes do ano (outubro a janeiro), ocorrendo o inverso em relação à salinidade da água. Houve predomínio de fêmeas na população, que foram maiores e mais pesadas do que os machos. As fêmeas ovígeras foram capturadas de setembro a março, com maior incidência em dezembro. A fecundidade variou de 27 a 393 ovos (média de 217 ± 74 ovos fêmea-1) e foi melhor correlacionada com o peso do que com o tamanho das fêmeas. Tais características observadas para P. pandaliformis habitando essa marisma, como variações sazonais na abundância e período reprodutivo, são condizentes com as esperadas para populações de regiões subtropicais e temperadas. No entanto, o efeito do método de captura sobre tais características precisam ser testados.

Assuntos

RESUMO

In this study both population and reproductive aspects of the Palaemon pandaliformis caught with trap in a subtropical salt marsh were analyzed. Monthly samplings were carried out from July 2008 through August 2009. Higher abundances were registered along warmer months (October to January) and were negatively related to water salinity. This population was dominated by females, which were larger and heavier than males. Ovigerous females were caught from September through March, with higher incidence in December. Fecundity ranged from 27 to 393 eggs (mean: 217 ± 74 eggs female-1) and has better correlation with weight than female length. The observed characteristics for P. pandaliformis inhabiting this saltmarsh such as seasonal patterns in both abundance and reproductive period are consistent with those expected by subtropical and temperate populations. However, the sampling method effects need to be evaluated.(AU)

Nesse estudo foram analisados aspectos populacionais e reprodutivos de Palaemon pandaliformis, capturado com auxílio de armadilhas numa marisma subtropical. Amostragens mensais foram realizadas de julho de 2008 a agosto de 2009. As maiores abundâncias foram observadas durante os meses mais quentes do ano (outubro a janeiro), ocorrendo o inverso em relação à salinidade da água. Houve predomínio de fêmeas na população, que foram maiores e mais pesadas do que os machos. As fêmeas ovígeras foram capturadas de setembro a março, com maior incidência em dezembro. A fecundidade variou de 27 a 393 ovos (média de 217 ± 74 ovos fêmea-1) e foi melhor correlacionada com o peso do que com o tamanho das fêmeas. Tais características observadas para P. pandaliformis habitando essa marisma, como variações sazonais na abundância e período reprodutivo, são condizentes com as esperadas para populações de regiões subtropicais e temperadas. No entanto, o efeito do método de captura sobre tais características precisam ser testados.(AU)

Assuntos