Functional morphology of the male reproductive system in Callichirus major (Crustacea: Decapoda: Axiidea): Evidence of oocytes in the gonad
Callichirus major inhabits the intertidal region of marine ecosystems and it is frequently used as live bait for fishing. This study aimed to describe the functional anatomy of the male reproductive system by microscopic techniques. The animals were collected along the Corujão beach, Piuma—ES, Brazi...
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todo:paper_00017272_v99_n1_p32_Souza2023-10-03T13:51:54Z Functional morphology of the male reproductive system in Callichirus major (Crustacea: Decapoda: Axiidea): Evidence of oocytes in the gonad Souza, T.L. Braga, A.A. López-Greco, L.S. Nunes, E.T. ghost shrimp histology reproduction spermatogenesis anatomy cells and cell components crustacean female fishing functional morphology hermaphroditism histology intersexual interaction intertidal environment marine ecosystem morphology reproduction sperm spermatophore Brazil Animalia Callianassidae Callichirus major Crustacea Decapoda (Crustacea) Callichirus major inhabits the intertidal region of marine ecosystems and it is frequently used as live bait for fishing. This study aimed to describe the functional anatomy of the male reproductive system by microscopic techniques. The animals were collected along the Corujão beach, Piuma—ES, Brazil, and, in laboratory, the males were classified into two phases: immature (IM) and developed (DE) based on the macroscopic characteristics of the gonads. The gonad and vas deferens were dissected for histological routine and histochemical tests. Histologically, it was noted that in both phases, the more distal region of gonads has ovarian characteristics, showing developing oocytes. Also, different male germ cells were identified: spermatogonium (SPG), spermatocytes I and II (SPTCI, SPTCII), initial and final spermatid (IS, FS) and sperm (SPZ). Accessory cells with spherical or pyramidal nuclei were also present inside the testicular lobules. According to the vas deferens structure, three regions can be characterized: proximal (PVD), middle (MVD) and distal (DVD). In the lumen of the vas deferens, a spermatophoric matrix highly reactive for histochemical tests was observed. The presence of female germ cells in males suggests the occurrence of intersexuality or hermaphroditism in this species. © 2017 The Royal Swedish Academy of Sciences JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00017272_v99_n1_p32_Souza |
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Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
ghost shrimp histology reproduction spermatogenesis anatomy cells and cell components crustacean female fishing functional morphology hermaphroditism histology intersexual interaction intertidal environment marine ecosystem morphology reproduction sperm spermatophore Brazil Animalia Callianassidae Callichirus major Crustacea Decapoda (Crustacea) |
| spellingShingle |
ghost shrimp histology reproduction spermatogenesis anatomy cells and cell components crustacean female fishing functional morphology hermaphroditism histology intersexual interaction intertidal environment marine ecosystem morphology reproduction sperm spermatophore Brazil Animalia Callianassidae Callichirus major Crustacea Decapoda (Crustacea) Souza, T.L. Braga, A.A. López-Greco, L.S. Nunes, E.T. Functional morphology of the male reproductive system in Callichirus major (Crustacea: Decapoda: Axiidea): Evidence of oocytes in the gonad |
| topic_facet |
ghost shrimp histology reproduction spermatogenesis anatomy cells and cell components crustacean female fishing functional morphology hermaphroditism histology intersexual interaction intertidal environment marine ecosystem morphology reproduction sperm spermatophore Brazil Animalia Callianassidae Callichirus major Crustacea Decapoda (Crustacea) |
| description |
Callichirus major inhabits the intertidal region of marine ecosystems and it is frequently used as live bait for fishing. This study aimed to describe the functional anatomy of the male reproductive system by microscopic techniques. The animals were collected along the Corujão beach, Piuma—ES, Brazil, and, in laboratory, the males were classified into two phases: immature (IM) and developed (DE) based on the macroscopic characteristics of the gonads. The gonad and vas deferens were dissected for histological routine and histochemical tests. Histologically, it was noted that in both phases, the more distal region of gonads has ovarian characteristics, showing developing oocytes. Also, different male germ cells were identified: spermatogonium (SPG), spermatocytes I and II (SPTCI, SPTCII), initial and final spermatid (IS, FS) and sperm (SPZ). Accessory cells with spherical or pyramidal nuclei were also present inside the testicular lobules. According to the vas deferens structure, three regions can be characterized: proximal (PVD), middle (MVD) and distal (DVD). In the lumen of the vas deferens, a spermatophoric matrix highly reactive for histochemical tests was observed. The presence of female germ cells in males suggests the occurrence of intersexuality or hermaphroditism in this species. © 2017 The Royal Swedish Academy of Sciences |
| format |
JOUR |
| author |
Souza, T.L. Braga, A.A. López-Greco, L.S. Nunes, E.T. |
| author_facet |
Souza, T.L. Braga, A.A. López-Greco, L.S. Nunes, E.T. |
| author_sort |
Souza, T.L. |
| title |
Functional morphology of the male reproductive system in Callichirus major (Crustacea: Decapoda: Axiidea): Evidence of oocytes in the gonad |
| title_short |
Functional morphology of the male reproductive system in Callichirus major (Crustacea: Decapoda: Axiidea): Evidence of oocytes in the gonad |
| title_full |
Functional morphology of the male reproductive system in Callichirus major (Crustacea: Decapoda: Axiidea): Evidence of oocytes in the gonad |
| title_fullStr |
Functional morphology of the male reproductive system in Callichirus major (Crustacea: Decapoda: Axiidea): Evidence of oocytes in the gonad |
| title_full_unstemmed |
Functional morphology of the male reproductive system in Callichirus major (Crustacea: Decapoda: Axiidea): Evidence of oocytes in the gonad |
| title_sort |
functional morphology of the male reproductive system in callichirus major (crustacea: decapoda: axiidea): evidence of oocytes in the gonad |
| url |
http://hdl.handle.net/20.500.12110/paper_00017272_v99_n1_p32_Souza |
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| _version_ |
1807315851081154560 |