Gonad development in females of fiddler crab Uca rapax (Crustacea, Brachyura, Ocypodidae) using macro and microscopic techniques

The morphology of the ovaries in Uca rapax (Smith, 1870) was described based on macroscopic and microscopic analysis. Females were collected in Itamambuca mangrove, Ubatuba, state of São Paulo, Brazil. In the laboratory, 18 females had their ovaries removed and prepared for histology. Each gonad dev...

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Autores principales: Castiglioni, D.D.S., Negreiros-Fransozo, M.L., Greco, L.S.L., Silveira, A.F., Silveira, S.O.
Formato: JOUR
Materias:
Histological analysis
Macroscopic analysis
Oogonias
Primary and secundary oocytes
Uca rapax
Brachyura
Brachyuran
Crustacea
Decapoda (Crustacea)
Ocypodidae
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00734721_v97_n4_p505_Castiglioni
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_00734721_v97_n4_p505_Castiglioni2023-10-03T14:53:34Z Gonad development in females of fiddler crab Uca rapax (Crustacea, Brachyura, Ocypodidae) using macro and microscopic techniques Castiglioni, D.D.S. Negreiros-Fransozo, M.L. Greco, L.S.L. Silveira, A.F. Silveira, S.O. Histological analysis Macroscopic analysis Oogonias Primary and secundary oocytes Uca rapax Brachyura Brachyuran Crustacea Decapoda (Crustacea) Ocypodidae Uca rapax The morphology of the ovaries in Uca rapax (Smith, 1870) was described based on macroscopic and microscopic analysis. Females were collected in Itamambuca mangrove, Ubatuba, state of São Paulo, Brazil. In the laboratory, 18 females had their ovaries removed and prepared for histology. Each gonad developmental stage was previously determined based on external and macroscopic morphology and afterwards each stage was microscopically described. The ovaries of U. rapax showed a pronounced macroscopic differentiation in size and coloration with the maturation of the gonad, with six ovarian developmental stages: immature, rudimentary, developing, developed, advanced and spent. During the vitellogenesis, the amount of oocytes in secondary stage increases in the ovary, resulting in a change in coloration of the gonad. Oogonias, primary oocytes, secondary oocytes and follicular cells were histologically described and measured. In female's ovaries of U. rapax the modifications observed in the oocytes during the process of gonad maturation are similar to descriptions of gonads of other females of brachyuran crustaceans. The similarities are specially found in the morphological changes in the reproductive cells, and also in the presence and arrange of follicle cells during the process of ovary maturation. When external morphological characteristics of the gonads were compared to histological descriptions, it was possible to observe modifications that characterize the process in different developmental stages throughout the ovarian cycle and, consequently, the macroscopic classification of gonad stages agree with the modifications of the reproductive cells. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00734721_v97_n4_p505_Castiglioni
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Histological analysis
Macroscopic analysis
Oogonias
Primary and secundary oocytes
Uca rapax
Brachyura
Brachyuran
Crustacea
Decapoda (Crustacea)
Ocypodidae
Uca rapax
spellingShingle Histological analysis
Macroscopic analysis
Oogonias
Primary and secundary oocytes
Uca rapax
Brachyura
Brachyuran
Crustacea
Decapoda (Crustacea)
Ocypodidae
Uca rapax
Castiglioni, D.D.S.
Negreiros-Fransozo, M.L.
Greco, L.S.L.
Silveira, A.F.
Silveira, S.O.
Gonad development in females of fiddler crab Uca rapax (Crustacea, Brachyura, Ocypodidae) using macro and microscopic techniques
topic_facet Histological analysis
Macroscopic analysis
Oogonias
Primary and secundary oocytes
Uca rapax
Brachyura
Brachyuran
Crustacea
Decapoda (Crustacea)
Ocypodidae
Uca rapax
description The morphology of the ovaries in Uca rapax (Smith, 1870) was described based on macroscopic and microscopic analysis. Females were collected in Itamambuca mangrove, Ubatuba, state of São Paulo, Brazil. In the laboratory, 18 females had their ovaries removed and prepared for histology. Each gonad developmental stage was previously determined based on external and macroscopic morphology and afterwards each stage was microscopically described. The ovaries of U. rapax showed a pronounced macroscopic differentiation in size and coloration with the maturation of the gonad, with six ovarian developmental stages: immature, rudimentary, developing, developed, advanced and spent. During the vitellogenesis, the amount of oocytes in secondary stage increases in the ovary, resulting in a change in coloration of the gonad. Oogonias, primary oocytes, secondary oocytes and follicular cells were histologically described and measured. In female's ovaries of U. rapax the modifications observed in the oocytes during the process of gonad maturation are similar to descriptions of gonads of other females of brachyuran crustaceans. The similarities are specially found in the morphological changes in the reproductive cells, and also in the presence and arrange of follicle cells during the process of ovary maturation. When external morphological characteristics of the gonads were compared to histological descriptions, it was possible to observe modifications that characterize the process in different developmental stages throughout the ovarian cycle and, consequently, the macroscopic classification of gonad stages agree with the modifications of the reproductive cells.
format JOUR
author Castiglioni, D.D.S.
Negreiros-Fransozo, M.L.
Greco, L.S.L.
Silveira, A.F.
Silveira, S.O.
author_facet Castiglioni, D.D.S.
Negreiros-Fransozo, M.L.
Greco, L.S.L.
Silveira, A.F.
Silveira, S.O.
author_sort Castiglioni, D.D.S.
title Gonad development in females of fiddler crab Uca rapax (Crustacea, Brachyura, Ocypodidae) using macro and microscopic techniques
title_short Gonad development in females of fiddler crab Uca rapax (Crustacea, Brachyura, Ocypodidae) using macro and microscopic techniques
title_full Gonad development in females of fiddler crab Uca rapax (Crustacea, Brachyura, Ocypodidae) using macro and microscopic techniques
title_fullStr Gonad development in females of fiddler crab Uca rapax (Crustacea, Brachyura, Ocypodidae) using macro and microscopic techniques
title_full_unstemmed Gonad development in females of fiddler crab Uca rapax (Crustacea, Brachyura, Ocypodidae) using macro and microscopic techniques
title_sort gonad development in females of fiddler crab uca rapax (crustacea, brachyura, ocypodidae) using macro and microscopic techniques
url http://hdl.handle.net/20.500.12110/paper_00734721_v97_n4_p505_Castiglioni
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