TY - JOUR
T1 - Reproduction of the pelagic thresher shark Alopias pelagicus in the equatorial Pacific
AU - Romero-Caicedo, A. F.
AU - Galván-Magaña, F.
AU - Martínez-Ortiz, J.
N1 - Publisher Copyright:
Copyright © 2014 Marine Biological Association of the United Kingdom.
PY - 2014/11/14
Y1 - 2014/11/14
N2 - The reproductive biology of the pelagic thresher shark Alopias pelagicus, was analysed based on 241 individuals (101 males and 140 females). Samples were collected from April 2005 to February 2006, from the artisanal fishery in Manta, Ecuador. Males ranged from 68 to 183 cm precaudal length (PL); females ranged from 70 to 180 cm PL. In embryos, sexual proportion was 1F:1M; while in adults the proportion was 1.4F:1M, which suggests sexual segregation in maturing individuals. We showed differences in the development of reproductive structures according to the reproductive condition, and in males the size at maturity occurs at 144.3 cm PL and in females at 151.4 cm PL. We recorded 33 pregnant females that presented one embryo in each uterus in different developmental stages. The results of this study provide information on reproduction of the species that will help to establish an appropriate fisheries management.
AB - The reproductive biology of the pelagic thresher shark Alopias pelagicus, was analysed based on 241 individuals (101 males and 140 females). Samples were collected from April 2005 to February 2006, from the artisanal fishery in Manta, Ecuador. Males ranged from 68 to 183 cm precaudal length (PL); females ranged from 70 to 180 cm PL. In embryos, sexual proportion was 1F:1M; while in adults the proportion was 1.4F:1M, which suggests sexual segregation in maturing individuals. We showed differences in the development of reproductive structures according to the reproductive condition, and in males the size at maturity occurs at 144.3 cm PL and in females at 151.4 cm PL. We recorded 33 pregnant females that presented one embryo in each uterus in different developmental stages. The results of this study provide information on reproduction of the species that will help to establish an appropriate fisheries management.
KW - maturity
KW - reproductive biology
KW - reproductive cycle
KW - sexual segregation
UR - http://www.scopus.com/inward/record.url?scp=84912030574&partnerID=8YFLogxK
U2 - 10.1017/S0025315414000927
DO - 10.1017/S0025315414000927
M3 - Artículo
SN - 0025-3154
VL - 94
SP - 1501
EP - 1507
JO - Journal of the Marine Biological Association of the United Kingdom
JF - Journal of the Marine Biological Association of the United Kingdom
IS - 7
ER -