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dc.contributor.author
Colonello, Jorge Horacio
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dc.contributor.author
Christiansen, Hugo
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dc.contributor.author
Cousseau, María Berta
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dc.contributor.author
Macchi, Gustavo Javier
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dc.date.available
2017-10-05T19:23:41Z
dc.date.issued
2013-05
dc.identifier.citation
Colonello, Jorge Horacio; Christiansen, Hugo; Cousseau, María Berta; Macchi, Gustavo Javier; Uterine dynamics of the southern eagle ray Myliobatis goodei (Chondrichthyes: Myliobatidae) from the southwest Atlantic Ocean; Taylor & Francis Ltd; Italian Journal Of Zoology; 80; 2; 5-2013; 187-194
dc.identifier.issn
1125-0003
dc.identifier.uri
http://hdl.handle.net/11336/26011
dc.description.abstract
Uterine layer changes and their relationship with the reproductive cycle were analyzed for the southern eagle ray Myliobatis goodei (Chondrichthyes: Myliobatidae), based on histological and histometric studies. The specimens were collected from bottom-trawl surveys conducted in the coastal southwest Atlantic ecosystem between latitude 34 and 42◦S. Oviduct samples were removed and fixed in 10% buffered formalin until processing for histological analysis. Both oviducts are developed in mature females, but only the left is functional. After ovulation, the size of the right posterior oviduct decreases and the left develops into a complex uterus that occupies almost the entire coelomic cavity. This uterus undergoes successive morphological and functional changes related to reproductive stages. Mucosa was characterized by temporal villous extensions or trophonemata with high variability depending on reproductive events. Invaginations or crypts associated with presumably lipid secretion (histotrophe) were observed between the trophonematum bases. The muscular layer develops into a complex muscular-vascular-conjunctive structure. The nutrition of early-gestation embryos is lecithotrophic and later they receive nutrients from the yolk sac and histotrophe. After yolk depletion, embryos become entirely dependent on histotrophe. Uterolactation, presumptive water imbibition of the muscular layer, and uterine hypertrophy observed in this study reinforce the “similarities” between Myliobatiformes and mammals.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Taylor & Francis Ltd
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
GESTATION
dc.subject
HISTOTROPHY
dc.subject
MYLIOBATIFORMES
dc.subject
TROPHONEMATA
dc.subject
UTERUS
dc.subject.classification
Bioquímica y Biología Molecular
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dc.subject.classification
Ciencias Biológicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Uterine dynamics of the southern eagle ray Myliobatis goodei (Chondrichthyes: Myliobatidae) from the southwest Atlantic Ocean
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-10-03T17:32:22Z
dc.journal.volume
80
dc.journal.number
2
dc.journal.pagination
187-194
dc.journal.pais
Reino Unido
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dc.journal.ciudad
Londres
dc.description.fil
Fil: Colonello, Jorge Horacio. Instituto Nacional de Investigaciones y Desarrollo Pesquero; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Christiansen, Hugo. Instituto Nacional de Investigaciones y Desarrollo Pesquero; Argentina
dc.description.fil
Fil: Cousseau, María Berta. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Marinas; Argentina
dc.description.fil
Fil: Macchi, Gustavo Javier. Instituto Nacional de Investigaciones y Desarrollo Pesquero; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.journal.title
Italian Journal Of Zoology
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1080/11250003.2012.742146
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.tandfonline.com/doi/abs/10.1080/11250003.2012.742146
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