Morphological evidence for protandric simultaneous hermaphroditism in the caridean Exhippolysmata oplophoroides

This study analyzed and described the sexual system of Exhippolysmata oplophoroides through the study of primary and secondary sexual characters at macroscopic and microscopic levels, to address the question of the existence of gonochorism or hermaphroditism in this species. The shrimps were collect...

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Autores principales: Braga, A.A., Greco, L.S.L., Santos, D.C., Fransozo, A.
Formato: JOUR
Materias:
Caridea
Gonadal development
Hermaphroditism
Hippolytidae
Protandry
Caridean
Decapoda (Crustacea)
Exhippolysmata oplophoroides
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_02780372_v29_n1_p34_Braga
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_02780372_v29_n1_p34_Braga2023-10-03T15:16:54Z Morphological evidence for protandric simultaneous hermaphroditism in the caridean Exhippolysmata oplophoroides Braga, A.A. Greco, L.S.L. Santos, D.C. Fransozo, A. Caridea Gonadal development Hermaphroditism Hippolytidae Protandry Caridea Caridean Decapoda (Crustacea) Exhippolysmata oplophoroides Hippolytidae This study analyzed and described the sexual system of Exhippolysmata oplophoroides through the study of primary and secondary sexual characters at macroscopic and microscopic levels, to address the question of the existence of gonochorism or hermaphroditism in this species. The shrimps were collected in the Ubatuba region, Sao Paulo, Brazil. A total of 487 individuals were examined, sexed, and measured. They were dissected and their gonads were fixed, sectioned, and stained. All individuals had ovotestes, oviducts, ejaculatory ducts, appendices masculinae, and gonopores on the coxae of the fifth pereiopods. Female gonopores were found only in shrimp above 6.0 mm carapace length (CL). According to the characters studied, E. oplophoroides is a protandric simultaneous hermaphrodite with a male phase and a simultaneous hermaphrodite phase and these findings confirm some recent experimental evidence from mating pairs. The gonad of the male phase consisted of paired ovotestes with an undeveloped ovarian portion. In the hermaphroditic stage, most individuals had small appendices masculinae, both male and female gonopores, and ovotestes with vitellogenic oöcytes and spermatozoa. The present study is the first detailed morphological description of the sexual system of Exhippolysmata oplophoroides. Our results are discussed in the light of new findings. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_02780372_v29_n1_p34_Braga
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Caridea
Gonadal development
Hermaphroditism
Hippolytidae
Protandry
Caridea
Caridean
Decapoda (Crustacea)
Exhippolysmata oplophoroides
Hippolytidae
spellingShingle Caridea
Gonadal development
Hermaphroditism
Hippolytidae
Protandry
Caridea
Caridean
Decapoda (Crustacea)
Exhippolysmata oplophoroides
Hippolytidae
Braga, A.A.
Greco, L.S.L.
Santos, D.C.
Fransozo, A.
Morphological evidence for protandric simultaneous hermaphroditism in the caridean Exhippolysmata oplophoroides
topic_facet Caridea
Gonadal development
Hermaphroditism
Hippolytidae
Protandry
Caridea
Caridean
Decapoda (Crustacea)
Exhippolysmata oplophoroides
Hippolytidae
description This study analyzed and described the sexual system of Exhippolysmata oplophoroides through the study of primary and secondary sexual characters at macroscopic and microscopic levels, to address the question of the existence of gonochorism or hermaphroditism in this species. The shrimps were collected in the Ubatuba region, Sao Paulo, Brazil. A total of 487 individuals were examined, sexed, and measured. They were dissected and their gonads were fixed, sectioned, and stained. All individuals had ovotestes, oviducts, ejaculatory ducts, appendices masculinae, and gonopores on the coxae of the fifth pereiopods. Female gonopores were found only in shrimp above 6.0 mm carapace length (CL). According to the characters studied, E. oplophoroides is a protandric simultaneous hermaphrodite with a male phase and a simultaneous hermaphrodite phase and these findings confirm some recent experimental evidence from mating pairs. The gonad of the male phase consisted of paired ovotestes with an undeveloped ovarian portion. In the hermaphroditic stage, most individuals had small appendices masculinae, both male and female gonopores, and ovotestes with vitellogenic oöcytes and spermatozoa. The present study is the first detailed morphological description of the sexual system of Exhippolysmata oplophoroides. Our results are discussed in the light of new findings.
format JOUR
author Braga, A.A.
Greco, L.S.L.
Santos, D.C.
Fransozo, A.
author_facet Braga, A.A.
Greco, L.S.L.
Santos, D.C.
Fransozo, A.
author_sort Braga, A.A.
title Morphological evidence for protandric simultaneous hermaphroditism in the caridean Exhippolysmata oplophoroides
title_short Morphological evidence for protandric simultaneous hermaphroditism in the caridean Exhippolysmata oplophoroides
title_full Morphological evidence for protandric simultaneous hermaphroditism in the caridean Exhippolysmata oplophoroides
title_fullStr Morphological evidence for protandric simultaneous hermaphroditism in the caridean Exhippolysmata oplophoroides
title_full_unstemmed Morphological evidence for protandric simultaneous hermaphroditism in the caridean Exhippolysmata oplophoroides
title_sort morphological evidence for protandric simultaneous hermaphroditism in the caridean exhippolysmata oplophoroides
url http://hdl.handle.net/20.500.12110/paper_02780372_v29_n1_p34_Braga
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AT santosdc morphologicalevidenceforprotandricsimultaneoushermaphroditisminthecarideanexhippolysmataoplophoroides
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