Annual, seasonal and spatial variation of abundance of the shrimp Artemesia longinaris (Decapoda: Penaeoidea) in south-eastern Brazil

Abstract

The in£uence of several environmental factors on the abundance and spatial^temporal distribution of the shrimp Artemesia longinaris were investigated from January 1998 to December 1999 in the Ubatuba region of Sa‹ o Paulo State, Brazil. Collections were performed monthly in the bays of Ubatumirim (UBM), Ubatuba (UBA) and Mar Virado (MV). Six sampling transects were established in each bay, four were parallel to the shore line, and two were next to the rocky shores. A commercial shrimp ¢shing boat equipped with two 'double-rig' nets was used. A total of 11,503 individuals was collected, including 1633 from UBM, 6344 from UBA and 3526 from MV. The majority of the captured specimens came from the deeper areas (15 to 20 m) with high salinity (34 to 36 ppt). The highest abundance of A. longinaris in Ubatuba bay was recorded in areas where ¢ne and very ¢ne sand comprised more than 70% of the sediment. Moreover, the abundance of A. longinaris followed a seasonal trend, being higher during the summer, when intrusions of cold South Atlantic Coastal Waters (SACW) are frequent. Thus, type of sediment, temperature and salinity are determinant factors in the distribution of A. longinaris in the studied region.

Population biology of the commercially exploited shrimp Artemesia longinaris (Decapoda: Penaeidae) in an upwelling region in the Western Atlantic: comparisons at different latitudes

“…Additionally, the density of A. longinaris increases with latitude (Magalhães, 1944;Boschi, 1969b). This pattern has also been observed in other studies, since the species is occasionally detected in smaller amounts on the coast of Rio de Janeiro (Iwai, 1973) and São Paulo States (Iwai, 1973;Costa et al, 2005). However, from the coast of Rio Grande do Sul State to Argentina (Boschi, 1969b) the species is caught all year long.…”

“…However, from the coast of Rio Grande do Sul State to Argentina (Boschi, 1969b) the species is caught all year long. Artemesia longinaris lives exclusively in the marine environment throughout its life cycle, without any period linked to continental brackish waters (Boschi, 1997;Costa et al, 2005).…”

“…However, the number of studies on population biology of this species is increasing in Brazil, emphasizing the studies of Nascimento (1981) and Ruffino and Castello (1992). Recently, mainly in Rio de Janeiro, São Paulo, and Santa Catarina States, information about population, breeding dynamics (Castilho et al, 2007a, b;Semensato and Di Benedito, 2008;Costa et al, 2010), and ecological distribution Costa et al, 2005) have been obtained and these authors state that longevity, size at onset of sexual maturity and maximum carapace length increase at higher latitudes. According to Castilho et al (2007b) reproduction and juvenile recruitment on the coast of São Paulo (tropical = 23°S) are continuous, whereas in Mar del Plata (cool-temperate = 37°S) these events are seasonal.…”

Distribution related to temperature and salinity of the shrimps Acetes americanus and Peisos petrunkevitchi (Crustacea: Sergestoidea) in the south-eastern Brazilian littoral zone

“…These shrimps were not found near the shallow coastal waters, even during the periods in which the salinity was favourable to the establishment of this species. The combination of lower salinities and higher temperature values, observed in the shallow sites, may have limited the entrance of P. petrunkevitchi to the areas with depths of 1, 5 and 9 m. The same pattern was observed by Costa et al (2004Costa et al ( , 2005 for P. muelleri and Artemesia longinaris Bate, 1888, respectively: both shrimps had geographical distributions similar to that of P. petrunkevitchi. Additionally, P. petrunkevitchi possesses a distribution associated with colder temperate regions, primarily concentrated off the Argentinean coast in shallow areas, which generally do not surpass 20 m in depth and where water temperatures oscillate from 8 to 248C (Mallo & Boschi, 1982).…”

Abundance and spatial-temporal distribution of the shrimp Xiphopenaeus kroyeri (Decapoda: Penaeidae): an exploited species in southeast Brazil

“…This specie is an important fishery resource globally (Gillett, 2008) and the second most important fishery resource in southeastern Brazil (Castro et al, 2005). The Southeastern-South Brazilian continental shelf suffers with high levels of extraction by artisanal and industrial fisheries, with main targeted species including the most profitable shrimp species such as the pink shrimp Farfantepenaeus brasiliensis (Latreille, 1817) and F. paulensis (Pérez Farfante, 1967), the white shrimp Litopenaeusschimitti (Burkenroad, 1936) and the Atlantic seabob shrimp Xiphopenaeu skroyeri (Heller, 1862) (Valentini et al, 1991a, b;D'Incao et al, 2002;Branco, 2005;Costa et al, 2005).Due to this intense commercial exploitation, in the last few years there has been a decline in shrimp natural stocks (IBAMA, 2006;Vasconcellos et al, 2007).…”