Sexual dimorphism in size, age, maturation, and growth characteristics of boarfish (Capros aper) in the Northeast Atlantic

Publication: Research - peer-reviewJournal article – Annual report year: 2012

View graph of relations

Sexual dimorphism in size, age, maturation, and growth characteristics of boarfish (Capros aper) in the Northeast Atlantic – ICES Journal of Marine Science, 69: 1729–1735.Boarfish (Capros aper) have, in recent years, become of increasing commercial importance due to their apparent increase in abundance in the Northeast Atlantic. This study presents detailed biological information relevant to understanding stock structure and dynamics. Boarfish are a long-lived species that reach a maximum age of >30 years. The size distribution is skewed towards larger sizes, as expected from an unexploited stock with sexual dimorphism, where females are, on average, larger than males. No seasonal effects occur in size distribution and sex ratio, indicating that females and males stay together in shoals throughout the year. Females become increasingly dominant in abundance at larger sizes and older ages. There is no significant difference in length at maturity nor age at maturity between the two sexes, with L50 = 9.7 cm and A50 = 3.4 years. Growth is dimorphic following von Bertalanffy growth characteristics, with a common t = –2.897, but significantly different K and Linf values, where females have K = 0.145 and Linf = 16.519 and males have K = 0.181 and Linf = 14.437. The sexual dimorphism in size is thus caused by sex-specific growth and longevity patterns
Original languageEnglish
JournalI C E S Journal of Marine Science
Publication date2012
Volume69
Issue10
Pages1729-1735
ISSN1054-3139
DOIs
StatePublished
CitationsWeb of Science® Times Cited: 3
Download as:
Download as PDF
Select render style:
APAAuthorCBEHarvardMLAStandardVancouverShortLong
PDF
Download as HTML
Select render style:
APAAuthorCBEHarvardMLAStandardVancouverShortLong
HTML
Download as Word
Select render style:
APAAuthorCBEHarvardMLAStandardVancouverShortLong
Word

ID: 12609691