Gonadosomatic index and weight/length relationship in females of three penaeoidean shrimps impacted by fisheries on the southeastern Brazilian coast

Author(s)

Renan Augusto Pereira dos Santos ^[1] ; Alexandre Ribeiro da Silva ^[2] ; Isabela Ribeiro Rocha de Moraes ^[3] ; Mariana Antunes ^[4] ; Ana Elisa Bielert Lopes ^[5] ; Rogério Caetano da Costa ^[6] ; Antonio Leão Castilho ^[7]

Affiliation

^[1] Universidade Estadual Paulista “Júlio de Mesquita Filho”. Instituto de Biociências de Botucatu. Programa de Pós-graduação em Ciências Biológicas (Zoologia) - Brasil

^[2] Universidade Estadual do Norte do Paraná - Brasil

^[3] Universidade Estadual Paulista “Júlio de Mesquita Filho”. Instituto de Biociências de Botucatu. Programa de Pós-graduação em Ciências Biológicas (Zoologia) - Brasil

^[4] Universidade Estadual Paulista “Júlio de Mesquita Filho”. Instituto de Biociências de Botucatu. Programa de Pós-graduação em Ciências Biológicas (Zoologia) - Brasil

^[5] Universidade Estadual Paulista “Júlio de Mesquita Filho”. Instituto de Biociências de Botucatu. Programa de Pós-graduação em Ciências Biológicas (Zoologia) - Brasil

^[6] Universidade Estadual Paulista “Júlio de Mesquita Filho”. Faculdade de Ciências. Departamento de Ciências Biológicas - Brasil

^[7] Universidade Estadual Paulista “Júlio de Mesquita Filho”. Instituto de Biociências de Botucatu. Programa de Pós-graduação em Ciências Biológicas (Zoologia) - Brasil

• Document type: Journal article
• Source: Nauplius; v. 28, 2020-12-04.

Abstract

Abstract The aim of this study was to evaluate the gonadosomatic index (GSI) and the weight/length ratio in important shrimp populations (Xiphopenaeus kroyeri (Heller, 1862), Litopenaeus schmitti (Burkenroad, 1936), Rimapenaeus constrictus (Stimpson, 1874)) from the northern littoral of São Paulo State. The samples were collected between 2015 and 2016, with 212 females that were identified, classified according to their gonadal development stage, and measured (CL). The gonads were macroscopically classified into immature, spent and developed, and were then removed. Both body (BodW) and gonad (GonW) dry weights were obtained in order to calculate the gonadosomatic index. Weight/length relationship and weight gain rate were assessed. The weight gain presented negative allometry, indicating that the animals grow faster than they gain weight. The weight/length relationship showed a pattern of continuous reproduction, as previously determined for tropical species. From the GSI values, it was possible to separate the three predetermined gonadal stages, proving that macroscopic evaluation is reliable for evaluating the reproductive period of these shrimps. These results can be used as a guide for fishery stocks management and monitoring. (AU)

• FAPESP's process: 15/01959-5 - Community structure of caridean shrimp on consolidated sublitoral in Vitoria Island and Laje de Santos, state of São Paulo
• Grantee: Isabela Ribeiro Rocha de Moraes
• Support Opportunities: Scholarships in Brazil - Master
• FAPESP's process: 15/13639-5 - Growth and reproductive dynamics of the shrimp Rimapenaeus constrictus (Stimpson, 1874) (Penaeoidea) in the Northern Coast of São Paulo: synthesis of a 5-year study
• Grantee: Ana Elisa Bielert Lopes
• Support Opportunities: Scholarships in Brazil - Master
• FAPESP's process: 10/50188-8 - Decapod crustaceans: multi-disciplinary characterization of the sea biodiversity of the State of São Paulo (taxonomy, spermiotaxonomy, molecular biology and population dynamics)
• Grantee: Fernando Luis Medina Mantelatto
• Support Opportunities: BIOTA-FAPESP Program - Thematic Grants