Spatial and temporal distribution and abundance of two species of Persephona (Decapoda: Brachyura: Leucosiidae) on the southern coast of the state of São Paulo, Brazil

Abstract

Spatial and temporal distribution and abundance of two species of Persephona (Decapoda: Brachyura: Leucosiidae) on the southern coast of the state of São Paulo, Brazil. Biota Neotropica. 19(1): e20180534. http://dx.Abstract: Crabs of the genus Persephona are intensely captured in shrimp fisheries as bycatch in the Cananéia region off the coast of the state of São Paulo, Brazil. The analysis of the spatial and temporal distribution of Persephona punctata and Persephona mediterranea could provide information about variation in the abundance of these species, as well as the environmental variables affecting their distribution and the existence of a possible habitat partitioning. Using a shrimp fishery boat equipped with double-rig nets, crabs were monthly captured from July 2012 to June 2014 in seven sites: four in the coastal area adjacent to the Cananéia region and three in the Mar Pequeno estuarine area. The abundances of both species were compared according to spatial (among sites) and temporal (years and seasons) scale distribution. A total of 396 individuals of P. punctata and 64 of P. mediterranea were captured. The abundance of both species was higher in the second sampling year (July 2013-June 2014) and in coastal areas; only one individual of each species was captured in the estuarine area due to the low salinity at this location (approximately 27.7‰). The temperature was the environmental variable that most affected the distribution of both species, which was more abundant in warmer periods. The temporal variation in abundance was modulated by temperature, while salinity modulated the spatial distribution of P. punctata and P. mediterranea. The spatial-temporal distribution of both species differered in Cananéia, pointing to a similar use of the environment's resources. Distribuição espacial e temporal e abundância de duas espécies do gêneroPersephona (Decapoda: Brachyura: Leucosiidae) no litoral sul do estado de São Paulo, Brasil Resumo: Os caranguejos Persephona são intensamente capturados na pesca do camarão como fauna acompanhante, inclusive na região de Cananéia no litoral do estado de São Paulo, no Brasil. A avaliação da distribuição espaço-temporal pode, consequentemente, fornecer informações sobre variações na abundância de Persephona punctata e Persephona mediterranea, bem como as variáveis ambientais que afetam suas distribuições e uma possível partilha de habitat desses congêneres. Com um barco de pesca de camarão equipado com redes de arrasto duplo, os indivíduos foram coletados mensalmente de julho de 2012 a junho de 2014 em sete locais: quatro na área costeira adjacente à região de Cananéia e três na área estuarina Mar Pequeno. A abundância dessas espécies foi comparada de acordo com a distribuição espacial (entre sítios) bem como entre anos e estações. Um total de 396 indivíduos de P. punctata e de 64 de P. mediterranea foram capturados. A abundância de ambas as espécies foi maior no segundo ano de coleta (julho de 2013 a junho de 2014). A abundância de ambas as espécies foi maior na área c...

Variation in size distribution of juvenile pink shrimps Farfantepenaeus brasiliensis and F. paulensis in the estuarine-adjacent ocean area of Cananéia, south-eastern coast of Brazil

“…According to the mean size (CL mm) from each sampling station, the largest F. brasiliensis individuals occurred in the Coastal Area (S1), where salinity values were higher, on average 34‰ (Perroca et al ., 2019), while the average sizes of F . paulensis were similar between regions.…”

“…According to the mean size (CL mm) from each sampling station, the largest F. brasiliensis individuals occurred in the Coastal Area (S1), where salinity values were higher, on average 34‰ (Perroca et al, 2019), while the average sizes of F. paulensis were similar between regions. This is related to the species' higher tolerance to lower salinities (Pérez-Fanfante, 1969;Iwai, 1973;Tsuzuki et al, 2000;Wasielesky, 2000;Costa et al, 2008), allowing sub-adult individuals of F. paulensis to remain in the inner areas of the Mar Pequeno for longer (S6 and S7), where salinity oscillates more due to the low depth and the influence of continental waters (Perroca et al, 2019).…”

“…paulensis were similar between regions. This is related to the species' higher tolerance to lower salinities (Pérez-Fanfante, 1969; Iwai, 1973; Tsuzuki et al , 2000; Wasielesky, 2000; Costa et al ., 2008), allowing sub-adult individuals of F. paulensis to remain in the inner areas of the Mar Pequeno for longer (S6 and S7), where salinity oscillates more due to the low depth and the influence of continental waters (Perroca et al ., 2019).…”

Dynamics of a subtropical population of the purse crab Persephona punctata (Decapoda: Brachyura: Leucosiidae) in Southeastern Brazil

“…(2010) estimated the sexual maturity in Ilhéus, in the state of Bahia. The exception is the study of Perroca et al (2019), which estimated the abundance and distribution of a P. punctata population in Cananéia, in the subtropical region.…”