Genetic and morphological identification of pelagic juvenile rockfish collected from the Gulf of Alaska

Kendall Jr., Arthur W. and Kondzela, Christine and Li, Zhuozhuo and Clausen, David and Gharrett, Anthony J. (2007) Genetic and morphological identification of pelagic juvenile rockfish collected from the Gulf of Alaska. Seattle, WA, NOAA/National Marine Fisheries Service, (NOAA Professional Paper NMFS, 9)

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Abstract

Pelagic juvenile rockfish (Sebastes spp.) collected in surveys designed to assess juvenile salmonids and other species in the Gulf of Alaska in 1998 and 2000–2003 provide an opportunity to document the occurrence of the pelagic juveniles of several species of rockfish. Often, species identification of rockfish is difficult or impossible at this stage of development (~20 to 60 mm), and few species indigenous to Alaska waters have been described. Use of mitochondrial DNA markers for rockfish species allowed unequivocal identification of ten species (S. aleutianus, S. alutus, S. borealis, S. entomelas, S. flavidus, S. melanops, S. pinniger, S. proriger, S. reedi, and S. ruberrimus) in subsamples from the collections. Other specimens were genetically assignable to groups of two or three species. Sebastes borealis, S. crameri, and S. reedi were identified using morphological data. Combining genetic and morphological data allowed successful resolution of the other species as S. emphaeus, probably S. ciliatus (although S. polyspinis cannot be totally ruled out), and S. polyspinis. Many specimens were initially morphologically indistinguishable from S. alutus, and several morphological groups included fish genetically identified as S. alutus. This paper details the characteristics of these pelagic juveniles to facilitate morphological identification of these species in future collections. (PDF file contains 32 pages.)

Item Type: Monograph or Serial Issue
Title: Genetic and morphological identification of pelagic juvenile rockfish collected from the Gulf of Alaska
Personal Creator/Author:
CreatorsEmail
Kendall Jr., Arthur W.
Kondzela, Christine
Li, Zhuozhuo
Clausen, David
Gharrett, Anthony J.
Series Name: NOAA Professional Paper NMFS
Number: 9
Date: 2007
Publisher: NOAA/National Marine Fisheries Service
Place of Publication: Seattle, WA
Issuing Agency: United States National Marine Fisheries Service
Subjects: Ecology
Management
Fisheries
Item ID: 2476
Depositing User: Patti M. Marraro
Date Deposited: 23 Jul 2009 23:13
Last Modified: 21 Feb 2014 01:10
URI: http://aquaticcommons.org/id/eprint/2476

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