Case Study: Blue and Mako Shark Catch Rates in US Atlantic Recreational Fisheries as Potential Indices of Abundance

Gregory Skomal, Elizabeth A Babcock, Ellen K. Pikitch

Research output: Chapter in Book/Report/Conference proceedingChapter

4 Scopus citations

Abstract

Generalized linear models were used to derive indices of abundance for blue (Prionace glauca) and shortfin mako (Isurus oxyrinchus) sharks based on two components of the US Atlantic recreational fishery: (1) the private and charter boat recreational anglers covered by the Marine Recreational Fisheries Statistics Survey (MRFSS, 1981-2002) of the National Marine Fisheries Service and (2) Massachusetts shark tournaments (1991-2004). From the MRFSS data, blue shark catch per unit effort (CPUE) showed different trends for different regions, seasons, and fishing modes, implying that CPUE is not tracking blue shark abundance. Mako shark CPUE differed by mode for private versus charter boats, and showed no trend in either boat type. From the Massachusetts tournament data, blue shark CPUE showed different trends north and south of Cape Cod. Mako shark CPUE declined in the late 1990s in Massachusetts tournaments, then increased again in 2002.

Original languageEnglish (US)
Title of host publicationSharks of the Open Ocean: Biology, Fisheries and Conservation
Publisherwiley
Pages205-212
Number of pages8
ISBN (Print)9781444302516, 0632059958, 9780632059959
DOIs
StatePublished - Jan 30 2009

Keywords

  • Angling
  • Blue shark
  • CPUE
  • Game fishing
  • Isurus oxyrinchus
  • Mako shark
  • Prionace glauca
  • Recreational fishing
  • Shark tournaments

ASJC Scopus subject areas

  • Engineering(all)
  • Agricultural and Biological Sciences(all)

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  • Cite this

    Skomal, G., Babcock, E. A., & Pikitch, E. K. (2009). Case Study: Blue and Mako Shark Catch Rates in US Atlantic Recreational Fisheries as Potential Indices of Abundance. In Sharks of the Open Ocean: Biology, Fisheries and Conservation (pp. 205-212). wiley. https://doi.org/10.1002/9781444302516.ch16