Relative growth and morphological sexual maturity of the caridean shrimp Nematopalaemon schmitti (Decapoda: Caridea: Palaemonidae) in an upwelling region in the Western Atlantic

Author(s)

Herrera, Daphine Ramiro ^[1] ; Davanso, Thiago Maia ^[2] ; da Costa, Rogerio Caetano ^[1]

Affiliation

^[1] Sao Paulo State Univ UNESP, Fac Sci, Dept Biol Sci, Lab Biol Marine & Freshwater Shrimp LABCAM, Bauru - Brazil

^[2] Paulista Univ UNIP, Inst Hlth Sci, Bauru - Brazil

• Document type: Journal article
• Source: INVERTEBRATE REPRODUCTION & DEVELOPMENT; v. 62, n. 1, p. 56-62, 2018.
• Web of Science Citations: 2

Abstract

In crustaceans, successful reproductive processes, such as the transition from juvenile to adult, exhibit important morphological changes that can be detected by analyzing relative growth. This study describes the relative growth of body structures in Nematopalaemon schmitti and its secondary sexual characteristics, and also estimates the morphological sexual maturity of this species in a region influenced by upwelling. The carapace length (CL), second pleuron length (PlL), cheliped carpus length (CaL), cheliped propodus length (PrL) and the length of appendix masculina (AML) of the shrimp were measured. The relationships that best demonstrated the changes in allometric coefficient between demographic categories were AML vs. CL for males, and PlL vs. CL for females. The estimated CL for morphological sexual maturity in males was 8.51 mm and 9.30 in females. Our results showed the appendix masculine and the second pleuron were secondary sexual characteristics that play roles in reaching the morphological sexual maturity necessary for reproductive success and to assure the life cycle of this species. (AU)

• FAPESP's process: 10/13008-1 - Ecological distribution and population dynamics of shrimp Nematopalaemon schmitti (Holthuis, 1950) (Caridea, Palaemonidae) in the region of Macaé/RJ, Brazil.
• Grantee: Daphine Ramiro Herrera
• Support Opportunities: Scholarships in Brazil - Master
• FAPESP's process: 09/54672-4 - Reproductive biology and dynamic population of the Penaeoidean shrimps (Crustacea, Decapoda) from southeastern Brazilian coast: latitudinal effect and suggestion for fishery control
• Grantee: Rogério Caetano da Costa
• Support Opportunities: Regular Research Grants
• 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