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Lifespan and population dynamics of the endemic South American shrimpArtemesia longinaris (Crustacea: Penaeidae) in southeastern Brazil Anais da ABC (AABC)
CASTILHO,ANTONIO L.; GRABOWSKI,RAPHAEL C.; SIMÕES,SABRINA M.; SANTOS,ANA PAULA F.; COSTA,ROGÉRIO C.; FRANSOZO,ADILSON.
ABSTRACT The present study investigated the growth, longevity and reproductive dynamics ofArtemesia longinaris in the southeastern coast of Brazil over a two-year period. Monthly collections were conducted in Ubatuba and Caraguatatuba using a shrimp fishing boat equipped with "double-rig" nets. Each region was divided into 7 sampling stations up to 35 m deep. Size frequency distributions, growth, longevity, sex ratio, and abundance of individuals in each demographic class, were compared. The relationship between abiotic factors and abundance of each demographic class was assessed using a Canonical Correlation Analysis. A total of 64,641 individuals were collected (6,928 measured) with an estimated longevity of 1.30 (Ubatuba) and 1.14 (Caraguatatuba) years...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Habitat selection; Latitudinal variation; Longevity; Penaeoidea; Reproductive dynamics.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000502123
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The influence of environmental variables in the reproductive performance of Macrobrachium amazonicum (Heller, 1862) (Caridea: Palaemonidae) females in a continental population Anais da ABC (AABC)
PANTALEÃO,JOÃO ALBERTO F.; CARVALHO-BATISTA,ABNER; TEODORO,SARAH S.A.; COSTA,ROGÉRIO C..
ABSTRACT Macrobrachium amazonicum is a commercially important freshwater prawn with a high degree of reproductive plasticity. The species is classified into two groups: coastal populations, with larger individuals exhibiting high fecundity and needing brackish water for larval development; and continental populations, with smaller specimens exhibiting low fecundities and completing metamorphosis in freshwater. The objective of this study was to investigate the influence of environmental factors in the fecundity, egg size and volume, and reproductive output in females of M. amazonicum from a continental population during a two-year period. We also compared our results with those obtained for other continental and coastal populations. Reproductive parameters...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amazon river prawn; Shrimp; Tietê; Abiotic factors; Reproductive output.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000401445
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