Journal Article

Sexual maturation in turbot (<i>Scophthalmus maximus</i>) is related to genotypic oxygen affinity: experimental support for Pauly’s juvenile-to-adult transition hypothesis

A. K. Imsland

in ICES Journal of Marine Science

Published on behalf of ICES/CIEM

Volume 56, issue 3, pages 320-325
Published in print June 1999 | ISSN: 1054-3139
Published online June 1999 | e-ISSN: 1095-9289 | DOI: http://dx.doi.org/10.1006/jmsc.1999.0470
Sexual maturation in turbot (Scophthalmus maximus) is related to genotypic oxygen affinity: experimental support for Pauly’s juvenile-to-adult transition hypothesis

More Like This

Show all results sharing these subjects:

  • Environmental Science
  • Marine and Estuarine Biology

GO

Show Summary Details

Preview

The relationships between genotypical differences in oxygen affinity and age at first maturation were investigated. Haemoglobins of 52 turbot were analysed by agar gel electrophoresis and the fish segregated into three genotypes; Hb-I(1/1), Hb-I(1/2), and Hb-I(2/2). The genotype Hb-I(2/2) had the highest oxygen affinity, Hb-I(1/1) the lowest, and that of Hb-I(1/2) lay in between. For both sexes fewer fish of the Hb-I(1/1) and Hb-I(1/2) genotypes matured at 2 years of age compared to the Hb-I(2/2) genotype. The difference was significant only for males. It is concluded that genotypical oxygen affinity properties are related to age at first maturity in turbot, thus lending support to Pauly’s 1984 hypothesis that oxygen supply per unit weight is the master factor in inducing the transition from juvenile to adult in fishes. However, it can not be excluded that sexual maturation in turbot is size determined as Hb-I(2/2) males had higher final weight compared to other genotypes.

Keywords: Scophthalmus maximus; sexual maturation; oxygen affinity

Journal Article.  0 words. 

Subjects: Environmental Science ; Marine and Estuarine Biology

Full text: subscription required

How to subscribe Recommend to my Librarian

Users without a subscription are not able to see the full content. Please, subscribe or login to access all content.