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ICES Journal of Marine Science: Journal du Conseil 2003 60(6):1335-1341; doi:10.1016/S1054-3139(03)00146-2
© 2003 by ICES/CIEM International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer
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Reproductive biology and embryonic development of Centroscymnus coelolepis in Portuguese mainland waters

Ana Veríssimoa, Leonel Gordob,* and Ivone Figueiredoa

a IPIMAR, Av. de Brasília 1449-006 Lisboa, Portugal
b Faculdade de Ciências, Universidade de Lisboa, Departamento de Biologia Animal, Instituto de Oceanografia Bloco C2, Campo Grande, 1749-016 Lisboa, Portugal

*Correspondence to L. Gordo; tel: +351 217500000; fax: +351 217500028. e-mail: lsgordo{at}fc.ul.pt; averissimo{at}ipimar.pt; ivonefig{at}ipimar.pt.

A total of 871 females (76–122 cm) and 86 males (68–100 cm) of Centroscymnus coelolepis caught in Portuguese mainland waters were examined for reproductive characteristics. One hermaphroditic individual of 95 cm was found. Males were few in numbers and dominated by immature specimens. Female length at first sexual maturity was 98.5 cm. Mean ovarian and uterine fecundity were 13.2 oocytes per female and 9.9 embryos per pregnant female, respectively. Total length of embryos with completely absorbed external yolk sacs ranged between 233 and 300 mm. Sex ratio (F/M) of embryos with completely absorbed external yolk sac was 0.9. All stages of reproduction were found during the 12-month sampling period. Results were compared with those from other regions. A hypothesis is formulated on the existence of several regional populations based on morphometric and reproductive parameters observed in different areas.

Keywords: Centroscymnus coelolepis, embryonic development, fecundity, maturity, Portugal, reproductive cycle

Received 26 August 2002; accepted 6 June 2003.


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