Spatiotemporal variation of red shrimp Pleoticus muelleri (Spence Bate, 1888) (Crustacea, Decapoda, Solenoceridae) males reproductive stage in the Patagonian littoral, Argentina
Keywords:Pleoticus muelleri, reproduction, mature males, abundance
Red shrimp Pleoticus muelleri (Spence Bate, 1888) mature males size structure and adult males maturity stages frequency distribution were studied. The specimens, macroscopically differentiated in the area comprised between 42° S-47° S and 62° W and the coast during the 1998-2010 period were analyzed from a spatiotemporal approach. Besides, mature males relative abundance index derived from catch per unit of effort data was estimated. The samples and data analyzed were gathered in 24 research surveys performed by the Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP) and 59 trips of the commercial outrigger fleet. The statistical treatment of data included a cluster analysis and the application of the General Linear Model. The presence of P. muelleri mature males in the study area was observed all year round. The highest percentages and abundance values of that stage were observed in Autumn and Winter. Larger sizes were found in the San Jorge Gulf outer waters, Rawson and Camarones Bay in Spring. Males maturing process begins earlier and continues beyond the end of females reproductive activity. No seasonal maturity cycle in males was differentiated.
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Copyright (c) 2014 Mónica Fernández, Daniel Hernández, Gustavo Macchi
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