To Lump, or to Split? maybe the wrong question for stock identification of fishery resoures ...

• Main Authors: Cadrin, Steven X., Rothschild, Brian J., Wirgin, Isaac
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: ASC 2007 - Theme session K 2024
• Subjects: Fisheries and aquaculture; Technologies and data; Gadus morhua; Northwest Atlantic
• Online Access: https://dx.doi.org/10.17895/ices.pub.25258123.v1; https://ices-library.figshare.com/articles/conference_contribution/To_Lump_or_to_Split_maybe_the_wrong_question_for_stock_identification_of_fishery_resoures/25258123/1

No abstracts are to be cited without prior reference to the author.Stock identification for fishery management typically involves delineation of allopatric groups that have relatively homogeneous vital rates, are essentially self-sustaining and reproductively isolated from other groups. However, geographic stock structure of marine populations is seldom so simple, and distinct population processes and fishery effects operate at different spatial scales. Some components of biological production are sensitive to large-scale oceanic and atmospheric factors, as illustrated by recruitment and growth patterns of cod (Gadus morhua) resources throughout the northwest Atlantic. Conversely, population structure is also influenced by small-scale processes that help maintain local spawning groups, as evidenced by fine-scale genetic structure of cod in the Gulf of Maine and elsewhere in the northwest Atlantic. The difficulties associated with monitoring and managing fishery resources as allopatric groups suggest that a ...