Catch variability and growth of pink shrimp (Farfantepenaeus paulensis) in two coastal lagoons of uruguay and their relationship with ENSO events

Abstract

The pink shrimp Farfantepenaeus paulensis (Pérez Farfante, 1967) is distributed along the Atlantic Coast from Bahia (Brazil) to Mar del Plata (Argentina). The larval stages enter the Uruguayan brackish water lagoons during late spring to summer associated with tidal currents of the Brazilian Current. In such environments the growth is accelerated and in early autumn the individuals attain commercial size, supporting important regional artisanal fisheries. The pink shrimp catches from 1988 to 2013 were analyzed and related to phenomena of climate variability in ENSO events and to the growth of the species. The total catch ranges from 0.7 to 162 tons. The variation in catches has a negative relationship with the varied climatic events caused by El Niño. Growth parameters yielding values of L ∞ = 177 mm (total carapace length) and K = 1.48 for the period 2009-2013. These values differ slightly from those calculated for natural populations in southern Brazil, suggesting that the population is the same and thus implying the need for coordinated fisheries management between the two countries.

Proposed bycatch-reduction modifications of shrimp fyke nets used in South American lagoons

“…Usually, El Niño is associated with positive precipitation anomalies in southern Brazil (Grimm et al 2000). This fact was previously observed by Vianna and D'Incao (2006) and Santana et al (2015). These authors found a negative correlation between El Niño events and shrimp catches in South America.…”

Presence of the Pink shrimp Farfantepenaeus brasiliensis (Latreille, 1817) in the coastal lagoons of Uruguay (Crustacea: Decapoda: Penaeoidea)

“…Differences between RCL and weight in males and females for both species were observed, females being larger and heavier than males. Sexual dimorphism is common in shrimps and had been previously mentioned for F. brasiliensis and F. paulensis (Mello, 1973;Leite-Jr and Petrere-Jr, 2006;Santana et al, 2015;da Rosa et al, 2021).…”

“…In Uruguay, fisheries target only juveniles of F. paulensis during the phase they spend in the brackish coastal lagoons of the Atlantic coast (Fig. 1), usually between February and May (Santana and Fabiano, 1999;Fabiano and Santana, 2006;Santana et al, 2015). Its presence is occasional on the Argentinean coast (Pérez-Farfante, 1969;1988;Spivak, 1997), with Uruguay being the southern limit of commercial capture (Santana and Fabiano, 1999;Fabiano and Santana, 2006;Santana et al, 2015).…”

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

“…The growth curves estimated for F. brasiliensis and F. paulensis revealed significant differences between sexes. Females of both species present larger asymptotic size in relation to males, as was estimated for populations of F. brasiliensis (Arreguím-Sanchez, 1981; Leite & Petrere, 2006; Lopes, 2012) and F. paulensis (D'Incao, 1991; Branco & Verani, 1998; Peixoto et al ., 2001; Leite & Petrere, 2006; Antunes, 2007; Lopes, 2012; Santana et al ., 2015) in different localities. The size of the peneid females is very important for reproduction, as found in a study with F. brasiliensis in which, regardless of weight, females with larger body proportions were better able to reproduce (Flor et al ., 2016).…”