Abstract
Abstract The goal of this study was to estimate the biometric relationships and sex ratio for the red-spotted shrimp Farfantepenaeus brasiliensis (Latreille, 1817) from the coast of Sergipe, northeastern Brazil. A total of 132 specimens of F. brasiliensis were collected and analyzed (65 females and 67 males) from May 2015 to May 2016. The overall sex ratio did not differ significantly from 1:1. Female size ranged from 20.73-46.43 mm of carapace length (CL), whereas male size ranged from 20.75-32.47 mm CL. Females were larger (34.78±6.05 mm CL, 152.61±19.68 mm of total length (TL)) and heavier (27.45±11.12 g of wet weight (WW)) than males (27.07±2.56 mm CL, 123.77±11.37 mm TL and 14.48±3.98 g WW). All biometric relationships were different between females and males. Both TL vs CL and WW vs TL relationships indicated positive allometric growth. Data shown here correspond to an adult population exploited by local shrimp fleets and are an important contribution to the biological knowledge of this species, especially in northeastern Brazil, where there is no information available.
Highlights
Marine shrimps of the genus Farfantepenaeus Burukovsky, 1997 are one of the most exploited fishing resources along the Brazilian coast due to their high market value (Dias-Neto, 2011; Boos et al, 2016)
Each sample was taken to the Laboratório de Ecologia Pesqueira (LEP) of the Departamento de Engenharia de Pesca e Aquicultura (Depaq) at the Universidade Federal de Sergipe (UFS) and kept frozen until processing
Each specimen was identified according to Costa et al (2003) and Teodoro et al (2016), and all F. brasiliensis present in all samples were separated
Summary
Marine shrimps of the genus Farfantepenaeus Burukovsky, 1997 are one of the most exploited fishing resources along the Brazilian coast due to their high market value (Dias-Neto, 2011; Boos et al, 2016). The total catch of Farfantepenaeus spp. in Brazil was about 10.3 thousand tonnes in 2011, the last year for which catch statistics were available at a national level (Brasil, 2011). This amount was surpassed only by the Atlantic seabob shrimp, Xiphopenaeus kroyeri (Heller, 1862), with total catches of 15.4 thousand tonnes (Brasil, 2011). It should be noted that in both national and local reports, there was no discrimination of catch by species, making it difficult to assess the exploitation status of each stock (Dias-Neto, 2011; Valentini et al, 2012; Freire et al, 2015)
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