Size and age estimates at sexual maturity for the little skateLeucoraja erinaceafrom the western Gulf of Maine, U.S.A
| Autor: | James A. Sulikowski, G. W. Ingram, David M. Koester, Jeff Kneebone, William B. Driggers, Paul C. W. Tsang, A. M. Cicia |
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| Rok vydání: | 2009 |
| Předmět: |
Male
Younger age media_common.quotation_subject Aquatic Science Leucoraja erinacea Little skate Animals Body Size Sexual maturity Sexual Maturation Skates Fish Maine Gonadal Steroid Hormones Atlantic Ocean Ecology Evolution Behavior and Systematics media_common Maturity (geology) biology Ecology biology.organism_classification Spine Ageing Female Reproduction Demography |
| Zdroj: | Journal of Fish Biology. 75:1648-1666 |
| ISSN: | 1095-8649 0022-1112 |
| DOI: | 10.1111/j.1095-8649.2009.02392.x |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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