Demographic characteristics of exploited tropical lutjanids: a comparative analysis

Heupel, Michelle R. and Williams, Ashley A. and Welch, David J. and Davies, Campbell R. and Penny, Ann and Kritzer, Jacob P. and Marriott, Ross J. and Mapstone, Bruce D. (2010) Demographic characteristics of exploited tropical lutjanids: a comparative analysis. Fishery Bulletin, 108(4), pp. 420-432.

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Abstract

Demographic parameters from seven exploited coral reef lutjanid species were compared as a case study of the implications of intrafamily variation in life histories for multispecies harvest management. Modal lengths varied by 4 cm among four species (Lutjanus fulviflamma, L. vitta, L. carponotatus, L. adetii), which were at least 6 cm smaller than the modal lengths of the largest species (L. gibbus, Symphorus nematophorus, Aprion virescens). Modal ages, indicating ages of full selection to fishing gear, were 10 years or less for all species, but maximum ages ranged from 12 (L. gibbus) to 36 years (S. nematophorus). Each species had a unique growth pattern, with differences in length-at-age and mean asymptotic fork length (L∞), but smaller species generally grew fast during the first 1–2 years of life and larger species grew more slowly over a longer period. Total mortality rates varied among species; L. gibbus had the highest mortality and L. fulviflamma, the lowest mortality. The variability in life history strategies of these tropical lutjanids makes generalizations about lutjanid life histories difficult, but the fact that all seven had characteristics that would make them particularly vulnerable to fishing indicates that harvest of tropical lutjanids should be managed with caution.

Item Type: Article
Title: Demographic characteristics of exploited tropical lutjanids: a comparative analysis
Personal Creator/Author:
CreatorsEmail
Heupel, Michelle R.
Williams, Ashley A.
Welch, David J.
Davies, Campbell R.
Penny, Ann
Kritzer, Jacob P.
Marriott, Ross J.
Mapstone, Bruce D.
Refereed: Yes
Journal or Publication Title: Fishery Bulletin
Volume: 108
Number: 4
Page Range: pp. 420-432
Date: 2010
ISSN: 0090-0656
Issuing Agency: United States National Marine Fisheries Service
Subjects: Biology
Ecology
Fisheries
Item ID: 8738
Depositing User: Patti M. Marraro
Date Deposited: 07 Jun 2012 14:45
Last Modified: 07 Jun 2012 14:45
URI: http://aquaticcommons.org/id/eprint/8738

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