Annual, seasonal and spatial abundance of the seabob shrimp Xiphopenaeus kroyeri (Decapoda, Penaeidae) off the Southeastern coast of Brazil

Abstract

We investigated the influence of environmental factors in spatial and temporal distribution of the seabob shrimp Xiphopenaeus kroyeri in Santos Bay and São Vicente Estuary, state of São Paulo, Brazil. Monthly samples were obtained, from May 2008 through April 2010, from four locations in the estuary and four in the bay. No individual was collected in the estuary and this was attributed to the low salinity means recorded in this environment. We collected 109,153 individuals in the bay and there was no difference in abundance between the two years comprised by the study period. The similarity in spatial distribution can be related to sediment grain size that in all sampling locations showed great amount of very fine sand. The largest amount of reproductive females was obtained in early 2010, when temperature was high, and this could have increased the juvenile recruitment in April 2010. According to our results, the distribution of X. kroyeri in the study area is influenced by temperature, which is related to reproduction, and salinity, limiting the entrance of individuals in the estuarine region.

Effects of ocean acidification and salinity variations on the physiology of osmoregulating and osmoconforming crustaceans

“…The shrimp X. kroyeri is one of the main fishery resources of the coast of the state of São Paulo, Brazil (Ávila-da-Silva et al 2007) and is distributed in the western Atlantic from Virginia (USA) to Rio Grande do Sul (Brazil) and in the eastern Pacific from Sinaloa (Mexico) to Paita (Peru) (Costa et al 2003). Because it inhabits shallow water and has spatio-temporal distribution patterns and a reproductive season heavily dependent on temperature and salinity, X. kroyeri is considered a good model for studies on the effects of climate change (Fransozo and Nakagaki 1998;Costa et al 2007;Almeida et al 2012;Heckler et al 2014). In addition, little is known about the osmoregulation and metabolism of either species when exposed to different salinities, although C. danae is frequently cited as an osmoregulating euryhaline species because of its wide distribution and similarity with known species of the genus Callinectes (Masui et al 2002(Masui et al , 2005Freire et al 2011).…”

Temporal variations in biomass and size of seabob shrimp Xiphopenaeus kroyeri (Heller, 1862) (Decapoda: Penaeoidea) on the southern coast of São Paulo state, Brazil

“…The sediment texture (phi) for the same year showed a larger particle diameter, which may have influenced the shrimp's migration to regions dominated by fine and very fine sand and/or silt + clay. The seabob shrimp's preference for fine sediments has also been reported in studies conducted in the Brazilian regions of Ubatuba, on the north coast of São Paulo (Costa et al, 2007;Simões et al, 2010) and Santos Bay in São Paulo (Heckler et al, 2014b); this has also been seen in other species in family Penaeidae such as Artemesia longinaris Spence Bate, 1888 (see Costa et al, 2005;Carvalho-Batista et al, 2011) and Litopenaeus schmitti (Burkenroad, 1936) (see Bochini et al, 2014).…”

“…Studies of X. kroyeri along the São Paulo coast have focused on aspects of their population biology (Nakagaki and Negreiros-Fransozo, 1998;Castro et al, 2005), reproductive biology and recruitment (Almeida et al, 2012;Heckler et al, 2013a;Castilho et al, 2015), population dynamics (Heckler et al, 2013b), and abundance and distribution (Costa et al, 2007;Simões et al, 2010;Heckler et al, 2014a;2014b). However, most of these studies did not address variation in biomass and individual size through monthly samples.…”

Population Structure of the Atlantic Seabob Shrimp Xiphopenaeus kroyeri (Heller, 1862) Based on Geometric Morphometrics

“…Although the presence of the same sediment type could create similar environment to Caravelas and Atafona, it is also important to consider that Atafona, which is still under the influence of South Atlantic Central Water (SACW), presents lower temperature and salinity than Caravelas (Bissaro et al). Also, Atafona has reproductive peaks occurring in autumn and winter (Davanso et al, 2017), which would make more difficult the gene flow among this stock and others analyzed herein, like Ubatuba, Santos and Cananéia with spring and summer reproductive peaks, and Caravelas, with summer reproductive peak (Santos & Silva; Heckler et al, 2014;Davanso et al). Furthermore, Bissaro et al analyzed 266 specimens in four locations, obtained between June and August 2009, using 16 LM, while in this study 171 specimens in seven locations, obtained between September 2008 and June 2010, were analyzed, using 14 LM.…”