Differences between Hatchery-Raised and Wild Blue Crabs: Implications for Stock Enhancement Potential

Autor: Oded Zmora, Yonathan Zohar, Alicia C. Young-Williams, Margaret A. Kramer, Anson H. Hines, Michael R. Goodison, Benjamin L. Carswell, Robert Aguilar, Jana L. D. Davis
Rok vydání: 2004
Předmět:
Zdroj: Transactions of the American Fisheries Society. 133:1-14
ISSN: 1548-8659
0002-8487
Popis: Stock enhancement of severely exploited, recruitment-limited fisheries has been controversial for several reasons, one of which is the lack of information about competency, competitiveness, and survivorship of hatchery-reared individuals released into the field. Because enhancement efforts have focused on finfish, even less information is available with which to assess enhancement potential of crustaceans. The Chesapeake Bay stock of blue crabs Callinectes sapidus has declined by more than 80% over the past 12 years and has exhibited recruitment limitation, leading to recent efforts to study the potential of enhancing populations with hatchery-reared juveniles. To assess how hatchery-raised juvenile blue crabs may fare after release into the Chesapeake Bay, we compared several aspects of hatchery and wild crabs. Hatchery crabs readily fed on natural prey, moved in the field similarly to wild crabs, and grew at rates similar to those of wild crabs; however, the two crab groups differed in other fa...
Databáze: OpenAIRE
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