Age and growth of the estuarine-dependent sparid Acanthopagrus berda in northern KwaZulu-Natal, South Africa

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dc.contributor.authorJames, N C
dc.contributor.authorMann, B Q
dc.contributor.authorBeckley, L E
dc.contributor.authorGovender, A
dc.date.accessioned2018-05-28T10:54:17Z
dc.date.available2018-05-28T10:54:17Z
dc.date.issued2003
dc.date.updated2016-01-19T09:34:29Z
dc.description.abstractAges were estimated for the tropical sparid, Acanthopagrus berda, caught in northern KwaZulu-Natal estuaries. Whole otoliths were used in the age determination. Age estimates were validated by marginal increment analysis and oxytetracycline labelling, which indicated that opaque deposition occurs primarily from September to November each year. The reproducibility of age estimates was described by a coefficient of variation of 10%. The von Bertalanffy growth curve was found to best describe the growth of A. berda. The parameters of the von Bertalanffy growth curve indicated that A. berda in northern KwaZulu-Natal is a slowgrowing species, capable of reaching at least 16 years of age. Longevity of the species, coupled with sex change, late maturation and estuarine dependency, give cause for concern for the continued sustainable utilization of this species.
dc.identifierhttp://dx.doi.org/10.1080/15627020.2003.11407280
dc.identifier.apacitationJames, N. C., Mann, B. Q., Beckley, L. E., & Govender, A. (2003). Age and growth of the estuarine-dependent sparid Acanthopagrus berda in northern KwaZulu-Natal, South Africa. <i>African Zoology</i>, http://hdl.handle.net/11427/28170en_ZA
dc.identifier.chicagocitationJames, N C, B Q Mann, L E Beckley, and A Govender "Age and growth of the estuarine-dependent sparid Acanthopagrus berda in northern KwaZulu-Natal, South Africa." <i>African Zoology</i> (2003) http://hdl.handle.net/11427/28170en_ZA
dc.identifier.citationJames, N. C., Mann, B. Q., Beckley, L. E., & Govender, A. (2003). Age and growth of the estuarine-dependent sparid Acanthopagrus berda in northern KwaZulu-Natal, South Africa. African Zoology, 38(2), 265-271.
dc.identifier.ris TY - AU - James, N C AU - Mann, B Q AU - Beckley, L E AU - Govender, A AB - Ages were estimated for the tropical sparid, Acanthopagrus berda, caught in northern KwaZulu-Natal estuaries. Whole otoliths were used in the age determination. Age estimates were validated by marginal increment analysis and oxytetracycline labelling, which indicated that opaque deposition occurs primarily from September to November each year. The reproducibility of age estimates was described by a coefficient of variation of 10%. The von Bertalanffy growth curve was found to best describe the growth of A. berda. The parameters of the von Bertalanffy growth curve indicated that A. berda in northern KwaZulu-Natal is a slowgrowing species, capable of reaching at least 16 years of age. Longevity of the species, coupled with sex change, late maturation and estuarine dependency, give cause for concern for the continued sustainable utilization of this species. DA - 2003 DB - OpenUCT DP - University of Cape Town J1 - African Zoology LK - https://open.uct.ac.za PB - University of Cape Town PY - 2003 T1 - Age and growth of the estuarine-dependent sparid Acanthopagrus berda in northern KwaZulu-Natal, South Africa TI - Age and growth of the estuarine-dependent sparid Acanthopagrus berda in northern KwaZulu-Natal, South Africa UR - http://hdl.handle.net/11427/28170 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/28170
dc.identifier.vancouvercitationJames NC, Mann BQ, Beckley LE, Govender A. Age and growth of the estuarine-dependent sparid Acanthopagrus berda in northern KwaZulu-Natal, South Africa. African Zoology. 2003; http://hdl.handle.net/11427/28170.en_ZA
dc.language.isoeng
dc.publisher.departmentDepartment of Biological Sciencesen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.sourceAfrican Zoology
dc.source.urihttps://www.tandfonline.com/loi/tafz20
dc.subject.otherwhole otoliths
dc.subject.othervon Bertalanffy
dc.subject.othergrowth curve
dc.subject.otherslow growing
dc.subject.otherlong-lived
dc.titleAge and growth of the estuarine-dependent sparid Acanthopagrus berda in northern KwaZulu-Natal, South Africa
dc.typeJournal Article
uct.type.filetypeText
uct.type.filetypeImage
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