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dc.contributor.author
Tourmente, Maximiliano
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dc.contributor.author
Giojalas, Laura Cecilia
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dc.contributor.author
Chiaraviglio, Margarita
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dc.date.available
2018-04-23T13:18:50Z
dc.date.issued
2011-03
dc.identifier.citation
Tourmente, Maximiliano; Giojalas, Laura Cecilia; Chiaraviglio, Margarita; Sperm parameters associated to reproductive ecology in two snakes species; Herpetologists League; Herpetologica; 67; 1; 3-2011; 58-70
dc.identifier.issn
0018-0831
dc.identifier.uri
http://hdl.handle.net/11336/42981
dc.description.abstract
The effect of temperature on sperm dynamic parameters in ectotherms in general, and reptiles in particular, remains poorly understood due to the lack of consistent evidence. As a group, snakes show considerable variability regarding mating systems, male reproductive behavior, thermoregulatory behavior, and preferred temperatures. Additionally, snakes present significant variability in sperm competition levels, which is determined by the species mating system. Because sperm longevity, motility, and velocity are positively related to reproductive success in both competitive and noncompetitive conditions, the sperm physiology of ectothermic organisms may functional optimally at ecologically relevant temperatures. The objective of this work was to analyze the effect of an ecologically plausible range of temperatures on sperm dynamic parameters of two species of snakes with contrasting mating systems and sperm competition levels: Boa constrictor occidentalis and Waglerophis merremii. To accomplish this, an in vitro incubation approach was used: sperm dynamic parameters (i.e., motility and velocity) were measured on sperm solution aliquots incubated at 25uC, 30uC, and 37uC for up to 10 h by means of a phase contrast video microscopy system. Results suggested that although an increase in temperature has a general negative impact on sperm motility and velocity, the two species studied present different degrees of sensitivity to high incubation temperatures. Moreover, these differences can be explained by the dissimilar thermal conditions that the sperm of the two species would experience during their reproductive seasons, which are a consequence of the differences in their reproductive behavior. In conclusion, sperm motility and swimming velocity respond mainly to environmental conditions imposed by mating systems rather than to selection by sperm competition.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Herpetologists League
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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
Snakes
dc.subject
Sperm Competition
dc.subject
Sperm Dynamic Parameters
dc.subject
Temperature Effects
dc.subject.classification
Otras Ciencias Biológicas
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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
Sperm parameters associated to reproductive ecology in two snakes species
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-04-16T14:03:59Z
dc.journal.volume
67
dc.journal.number
1
dc.journal.pagination
58-70
dc.journal.pais
Reino Unido
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dc.description.fil
Fil: Tourmente, Maximiliano. Universidad Nacional de Córdoba. Facultad de Cs.exactas Físicas y Naturales. Departamento de Diversidad Biológica y Ecologica; Argentina
dc.description.fil
Fil: Giojalas, Laura Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones Biológicas y Tecnológicas. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto de Investigaciones Biológicas y Tecnológicas; Argentina. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Centro de Biología Celular y Molecular; Argentina
dc.description.fil
Fil: Chiaraviglio, Margarita. Universidad Nacional de Córdoba. Facultad de Cs.exactas Físicas y Naturales. Departamento de Diversidad Biológica y Ecológica. Cátedra de Biología del Comportam. y Div. Animal Ii; Argentina
dc.journal.title
Herpetologica
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.bioone.org/doi/abs/10.1655/HERPETOLOGICA-D-10-00052.1
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