Journal Article

Reproductive biology and embryonic development of <i>Centroscymnus coelolepis</i> in Portuguese mainland waters

Ana Veríssimo, Leonel Gordo and Ivone Figueiredo

in ICES Journal of Marine Science

Published on behalf of ICES/CIEM

Volume 60, issue 6, pages 1335-1341
Published in print January 2003 | ISSN: 1054-3139
Published online January 2003 | e-ISSN: 1095-9289 | DOI: http://dx.doi.org/10.1016/S1054-3139(03)00146-2
Reproductive biology and embryonic development of Centroscymnus coelolepis in Portuguese mainland waters

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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

Journal Article.  3283 words.  Illustrated.

Subjects: Environmental Science ; Marine and Estuarine Biology

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