Gonadal Maturation in Pseudoplatystoma metaense x Leiarius marmoratus Hybrids, (Siluriformes: Pimelodidae)

SUMMARY: Establishing guidelines for responsible management in fish production systems requires knowledge of the basic biology of the fish to be raised. The objective of this work was to determine the reproductive capacity of hybrids produced from the crossing of females of Pseudoplatystoma metaense...

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Autores principales:	Rodriguez-Pulido,José, Villamil-Rodriguez,Jonathan, Mira-López,Tatiana, Cruz-Casallas,Pablo, Baldisserotto,Bernardo
Lenguaje:	English
Publicado:	Sociedad Chilena de Anatomía 2020
Materias:	Gonadal development Indices Sexual maturation
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022020000501405
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spelling	oai:scielo:S0717-950220200005014052021-06-10Gonadal Maturation in Pseudoplatystoma metaense x Leiarius marmoratus Hybrids, (Siluriformes: Pimelodidae)Rodriguez-Pulido,JoséVillamil-Rodriguez,JonathanMira-López,TatianaCruz-Casallas,PabloBaldisserotto,Bernardo Gonadal development Indices Sexual maturation SUMMARY: Establishing guidelines for responsible management in fish production systems requires knowledge of the basic biology of the fish to be raised. The objective of this work was to determine the reproductive capacity of hybrids produced from the crossing of females of Pseudoplatystoma metaense with males of Leiarius marmoratus. Males presented a digitiform, unrestricted spermatogonial testicle containing caudal digits producing glycoproteins that do not form a seminal vesicle. It was possible to find free sperm in the lumen of the tubules and in the ducts. The ovary of the females was found to be saccular and synchronous with at least three groups of oocytes. In the first year of life, only oogonia up to previtellogenic oocytes (cortical alveolus 284.9 ± 35.7 mm in diameter) were found. After the second year vitellogenic oocytes 730 ± 3.78 mm in diameter were observed. The events of gonadal development of the hybrids indicate that they are gonochoric, synchronic animals. The maturation peaks in the high-water season, overlapping with the parental species. Therefore, the escape of hybrids from fish cultures to the rivers may increase the risk of crosses, gene introgression, or diminution of the reproductive capacity of the pure species.info:eu-repo/semantics/openAccessSociedad Chilena de AnatomíaInternational Journal of Morphology v.38 n.5 20202020-10-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022020000501405en10.4067/S0717-95022020000501405
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Gonadal development Indices Sexual maturation
spellingShingle	Gonadal development Indices Sexual maturation Rodriguez-Pulido,José Villamil-Rodriguez,Jonathan Mira-López,Tatiana Cruz-Casallas,Pablo Baldisserotto,Bernardo Gonadal Maturation in Pseudoplatystoma metaense x Leiarius marmoratus Hybrids, (Siluriformes: Pimelodidae)
description	SUMMARY: Establishing guidelines for responsible management in fish production systems requires knowledge of the basic biology of the fish to be raised. The objective of this work was to determine the reproductive capacity of hybrids produced from the crossing of females of Pseudoplatystoma metaense with males of Leiarius marmoratus. Males presented a digitiform, unrestricted spermatogonial testicle containing caudal digits producing glycoproteins that do not form a seminal vesicle. It was possible to find free sperm in the lumen of the tubules and in the ducts. The ovary of the females was found to be saccular and synchronous with at least three groups of oocytes. In the first year of life, only oogonia up to previtellogenic oocytes (cortical alveolus 284.9 ± 35.7 mm in diameter) were found. After the second year vitellogenic oocytes 730 ± 3.78 mm in diameter were observed. The events of gonadal development of the hybrids indicate that they are gonochoric, synchronic animals. The maturation peaks in the high-water season, overlapping with the parental species. Therefore, the escape of hybrids from fish cultures to the rivers may increase the risk of crosses, gene introgression, or diminution of the reproductive capacity of the pure species.
author	Rodriguez-Pulido,José Villamil-Rodriguez,Jonathan Mira-López,Tatiana Cruz-Casallas,Pablo Baldisserotto,Bernardo
author_facet	Rodriguez-Pulido,José Villamil-Rodriguez,Jonathan Mira-López,Tatiana Cruz-Casallas,Pablo Baldisserotto,Bernardo
author_sort	Rodriguez-Pulido,José
title	Gonadal Maturation in Pseudoplatystoma metaense x Leiarius marmoratus Hybrids, (Siluriformes: Pimelodidae)
title_short	Gonadal Maturation in Pseudoplatystoma metaense x Leiarius marmoratus Hybrids, (Siluriformes: Pimelodidae)
title_full	Gonadal Maturation in Pseudoplatystoma metaense x Leiarius marmoratus Hybrids, (Siluriformes: Pimelodidae)
title_fullStr	Gonadal Maturation in Pseudoplatystoma metaense x Leiarius marmoratus Hybrids, (Siluriformes: Pimelodidae)
title_full_unstemmed	Gonadal Maturation in Pseudoplatystoma metaense x Leiarius marmoratus Hybrids, (Siluriformes: Pimelodidae)
title_sort	gonadal maturation in pseudoplatystoma metaense x leiarius marmoratus hybrids, (siluriformes: pimelodidae)
publisher	Sociedad Chilena de Anatomía
publishDate	2020
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022020000501405
work_keys_str_mv	AT rodriguezpulidojose gonadalmaturationinpseudoplatystomametaensexleiariusmarmoratushybridssiluriformespimelodidae AT villamilrodriguezjonathan gonadalmaturationinpseudoplatystomametaensexleiariusmarmoratushybridssiluriformespimelodidae AT miralopeztatiana gonadalmaturationinpseudoplatystomametaensexleiariusmarmoratushybridssiluriformespimelodidae AT cruzcasallaspablo gonadalmaturationinpseudoplatystomametaensexleiariusmarmoratushybridssiluriformespimelodidae AT baldisserottobernardo gonadalmaturationinpseudoplatystomametaensexleiariusmarmoratushybridssiluriformespimelodidae
_version_	1718445166657798144

Gonadal Maturation in Pseudoplatystoma metaense x Leiarius marmoratus Hybrids, (Siluriformes: Pimelodidae)

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