Biometric relationships and sex ratio for red-spotted shrimp Farfantepenaeus brasiliensis (Latreille, 1817) (Decapoda, Penaeidae) from the coast of Sergipe, northeastern Brazil

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,

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).…”

10.54451/PanamJAS.19.1.6

“…Morphometric relationships are important tools that help understanding essential biological aspects of populations of aquatic organisms. Allometry of growth from length-length relationships has been used to understand ecology and reproductive changes in several crustacean species, such as in crabs (e.g., Bertini et al 2007 and shrimps (e.g., Rosa et al 2021, Reis-Júnior et al 2023, where the analysis of the slope of these relationships are directly linked for example to energy investments during the reproductive processes. In addition, estimating weight from size is important in ecosystem modeling, especially when only length data is available and estimating biomass is required (Kimmerer et al 2005).…”