Size and age estimates at sexual maturity for the little skate Leucoraja erinacea from the western Gulf of Maine, U.S.A.

A. M. Cicia, W. B. Driggers, G. W. Ingram, J. Kneebone, P. C.W. Tsang, D. M. Koester, J. A. Sulikowski

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

Size and age estimates at sexual maturity were determined for 162 male and 273 female little skates Leucoraja erinacea collected from the western Gulf of Maine. Maturity ogives suggest that 50% maturity in females occurs at age 9·5 years and 480 mm total length (LT), whereas 50% maturity in males occurs at a slightly younger age of 7·7 years and smaller size of 460 mm LT. Age estimates were made from 389 L. erinacea ranging in size from 93 to 570 mm LT. The index of average per cent error and age-bias plots indicated that the ageing methods were precise and non-biased. Additionally, annual periodicity of band formation was validated with oxytetracycline in eight individuals (three males and five females) ranging in age from 3 to 12 years. In conclusion, results from this study indicate that L. erinacea exhibits characteristics that make other elasmobranch populations highly susceptible to overexploitation.

Original languageEnglish (US)
Pages (from-to)1648-1666
Number of pages19
JournalJournal of Fish Biology
Volume75
Issue number7
DOIs
StatePublished - Nov 2009
Externally publishedYes

Keywords

  • Elasmobranch
  • Hormones
  • Oxytetracycline
  • Rajidae
  • Reproduction

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Aquatic Science

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