The small shrimp, Potimirim brasiliana Villalobos, 1959 (Crustacea, Atyidae) from Brazilian southeastern littoral, and its sexual maturity

The shrimp Potimirim brasiliana plays an important role in streams along the Brazilian coast as it feeds on the organic debris from the surrounding ecosystem. We determined the morphological sexual maturity of P. brasiliana by means of relative growth. Monthly throughout a year, we used sieves (2 mm...

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Main Authors: Marina Machado da Costa, Patrícia Hoffmann, Geslaine Rafaela Lemos Gonçalves, Maria Lucia Negreiros-Fransozo
Format: Article
Language:English
Published: Universidade Federal de Goiás 2020-03-01
Series:Revista de Biologia Neotropical
Subjects:
Online Access:https://www.revistas.ufg.br/RBN/article/view/60646
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author Marina Machado da Costa
Patrícia Hoffmann
Geslaine Rafaela Lemos Gonçalves
Maria Lucia Negreiros-Fransozo
author_facet Marina Machado da Costa
Patrícia Hoffmann
Geslaine Rafaela Lemos Gonçalves
Maria Lucia Negreiros-Fransozo
author_sort Marina Machado da Costa
collection DOAJ
description The shrimp Potimirim brasiliana plays an important role in streams along the Brazilian coast as it feeds on the organic debris from the surrounding ecosystem. We determined the morphological sexual maturity of P. brasiliana by means of relative growth. Monthly throughout a year, we used sieves (2 mm mesh diameter) to collect the specimens in a coastal stream. A total of 3,521 specimens had their carapace length (CL) measured, as well as their second pleura length (PL) and the length (AML) and width (AMW) of the appendix masculina. The studied relationships were the following: CL vs. PL; CL vs. AML and CL vs. AMW, with the data adjusted to a logistic equation. All the relationships tested among the demographic groups differed statistically. The CL50 of females measured 3.45 mm, while the CL50 of males measured 2.75 mm. Two adult morphological groups were set apart for each sex. The CL vs. AMW relationship is the best at demonstrating the separation of the morphological groups for males. This fact is an intriguint issue as it suggests the presence of morphotypes in males, probably, playing different roles in the reproductive process.
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spelling doaj.art-7511bb9e7991403c83be0ae9c471c7332022-12-21T21:04:17ZengUniversidade Federal de GoiásRevista de Biologia Neotropical1807-96522178-05792020-03-0117110.5216/rbn.v17i1.60646The small shrimp, Potimirim brasiliana Villalobos, 1959 (Crustacea, Atyidae) from Brazilian southeastern littoral, and its sexual maturityMarina Machado da Costa0Patrícia Hoffmann1Geslaine Rafaela Lemos Gonçalves2Maria Lucia Negreiros-Fransozo3University of the São Paulo State, UNESP, Institute of Biosciences, Department of ZoologyUniversity of the São Paulo State, UNESP, Institute of Biosciences, Department of ZoologyUniversity of the São Paulo State, UNESP, Institute of Biosciences, Department of ZoologyUniversity of the São Paulo State, UNESP, Institute of Biosciences, Department of ZoologyThe shrimp Potimirim brasiliana plays an important role in streams along the Brazilian coast as it feeds on the organic debris from the surrounding ecosystem. We determined the morphological sexual maturity of P. brasiliana by means of relative growth. Monthly throughout a year, we used sieves (2 mm mesh diameter) to collect the specimens in a coastal stream. A total of 3,521 specimens had their carapace length (CL) measured, as well as their second pleura length (PL) and the length (AML) and width (AMW) of the appendix masculina. The studied relationships were the following: CL vs. PL; CL vs. AML and CL vs. AMW, with the data adjusted to a logistic equation. All the relationships tested among the demographic groups differed statistically. The CL50 of females measured 3.45 mm, while the CL50 of males measured 2.75 mm. Two adult morphological groups were set apart for each sex. The CL vs. AMW relationship is the best at demonstrating the separation of the morphological groups for males. This fact is an intriguint issue as it suggests the presence of morphotypes in males, probably, playing different roles in the reproductive process.https://www.revistas.ufg.br/RBN/article/view/60646CarideamorphologyreproductionUbatuba
spellingShingle Marina Machado da Costa
Patrícia Hoffmann
Geslaine Rafaela Lemos Gonçalves
Maria Lucia Negreiros-Fransozo
The small shrimp, Potimirim brasiliana Villalobos, 1959 (Crustacea, Atyidae) from Brazilian southeastern littoral, and its sexual maturity
Revista de Biologia Neotropical
Caridea
morphology
reproduction
Ubatuba
title The small shrimp, Potimirim brasiliana Villalobos, 1959 (Crustacea, Atyidae) from Brazilian southeastern littoral, and its sexual maturity
title_full The small shrimp, Potimirim brasiliana Villalobos, 1959 (Crustacea, Atyidae) from Brazilian southeastern littoral, and its sexual maturity
title_fullStr The small shrimp, Potimirim brasiliana Villalobos, 1959 (Crustacea, Atyidae) from Brazilian southeastern littoral, and its sexual maturity
title_full_unstemmed The small shrimp, Potimirim brasiliana Villalobos, 1959 (Crustacea, Atyidae) from Brazilian southeastern littoral, and its sexual maturity
title_short The small shrimp, Potimirim brasiliana Villalobos, 1959 (Crustacea, Atyidae) from Brazilian southeastern littoral, and its sexual maturity
title_sort small shrimp potimirim brasiliana villalobos 1959 crustacea atyidae from brazilian southeastern littoral and its sexual maturity
topic Caridea
morphology
reproduction
Ubatuba
url https://www.revistas.ufg.br/RBN/article/view/60646
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