An Index of Abundance for Coastal Species of Juvenile Sharks from the Northeast Gulf of Mexico

Carlson, John K. and Brusher, John H. (1999) An Index of Abundance for Coastal Species of Juvenile Sharks from the Northeast Gulf of Mexico. Marine Fisheries Review, 61(3), pp. 37-45.

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Official URL: http://spo.nwr.noaa.gov/mfr613/mfr6132.pdf

Abstract

A fishery-independent assessment of juvenile coastal shark populations in U.S. waters of the northeast Gulf of Mexico was conducted using two methods: gillnets and longlines. Surveys were conducted monthly during April–October in two fixed sampling areas from 1996 to 1998. The Atlantic sharpnose shark, Rhizoprionodon terraenovae, and the blacktip shark, Carcharhinus limbatus, were the most common species captured with either longlines or gillnets. An additional 14 shark species were captured, and juvenile indices of abundance were developed for 8 species with gillnets and 6 species of sharks with longlines. Trends in catch-per-unit-effort were found to vary depending on species. Length-frequency information revealed that the majority of sharks captured were juveniles. Given the direct relationship between stock and recruitment for sharks, continued monitoring of juvenile abundance will aid in determining the strength of the parental stock size and for predicting future population strength.

Item Type: Article
Title: An Index of Abundance for Coastal Species of Juvenile Sharks from the Northeast Gulf of Mexico
Personal Creator/Author:
CreatorsEmail
Carlson, John K.
Brusher, John H.
Refereed: Yes
Journal or Publication Title: Marine Fisheries Review
Volume: 61
Number: 3
Page Range: pp. 37-45
Date: 1999
ISSN: 0090-1830
Issuing Agency: United States National Marine Fisheries Service
Subjects: Biology
Ecology
Fisheries
Item ID: 9790
Depositing User: Patti M. Marraro
Date Deposited: 14 Aug 2012 20:15
Last Modified: 14 Aug 2012 20:15
URI: http://aquaticcommons.org/id/eprint/9790

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