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dc.creatorRamírez-Mosqueda,Edith
dc.creatorPérez-Jiménez,Juan Carlos
dc.creatorMendoza-Carranza,Manuel
dc.date2012-06-01
dc.date.accessioned2019-05-03T13:27:15Z
dc.date.available2019-05-03T13:27:15Z
dc.identifierhttps://scielo.conicyt.cl/scielo.php?script=sci_arttext&pid=S0718-560X2012000200008
dc.identifier.urihttp://revistaschilenas.uchile.cl/handle/2250/87779
dc.descriptionThe southern stingray Dasyatis americana (Hildebrand & Schroeder, 1928) is the most landed elasmobranch by small-scale fleets in southern gulf of Mexico. However, little is known of its life history parameters in this region. In this study, a total of 900 specimens were collected from February 2006 to December 2008 to determine the reproductive parameters needed for population assessments by means of ecological risk assessments or demographic analysis. Results suggested that females of D. americana reproduce annually, with a gestation of 7-8 months. The reproductive cycle of females is asynchronous, with ovulation and parturition occurring throughout the year. Females and males matured at 764 and 517 mm disc width (DW50) respectively. D. americana has one of the highest fecundity among dasyatids, from 2 to 7 embryos, with a sex ratio of embryos of 1:1. A linear relationship between maternal DW and fecundity was estimated, the larger females contain more embryos. The status of the population of D. americana is a cause of concern in the southern gulf of Mexico due to its high frequency of capture in artisanal fisheries and its apparently low biological productivity.
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dc.languageen
dc.publisherPontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar
dc.rightsinfo:eu-repo/semantics/openAccess
dc.sourceLatin american journal of aquatic research v.40 n.2 2012
dc.subjectDasyatis americana
dc.subjectdisc width at maturity
dc.subjectreproductive cycle
dc.subjectfecundity
dc.subjectgulf of Mexico
dc.titleReproductive parameters of the southern stingray Dasyatis americana in southern gulf of Mexico


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