Long-Term Dynamics of U.S. Atlantic Sea Scallop Placopecten magellanicus Populations
| Autor: | Paul J. Rago, Deborah R. Hart |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
0106 biological sciences
Biomass (ecology) Ecology biology 010604 marine biology & hydrobiology Fishing 04 agricultural and veterinary sciences Management Monitoring Policy and Law Aquatic Science biology.organism_classification 01 natural sciences Placopecten magellanicus Fishery Abundance (ecology) Scallop 040102 fisheries 0401 agriculture forestry and fisheries Environmental science 14. Life underwater Ecology Evolution Behavior and Systematics |
| Zdroj: | North American Journal of Fisheries Management. 26:490-501 |
| ISSN: | 1548-8675 0275-5947 |
| Popis: | Biomass and commercial catch rates of Atlantic sea scallops Placopecten magellanicus in the USA generally declined from the 1960s through the mid-1990s as fishing mortality increased. Sporadic large recruitment events temporarily increased landings but also encouraged higher overall fishing effort and thereby contributed to the long-term declines in resource abundance. In 1994, a number of new management measures were introduced, including a moratorium on new permits, limitations on days at sea, gear and crew restrictions, and year-round closed areas. During 1994–2005, the biomass of sea scallops in the U.S. sector of Georges Bank increased by a factor of about 18, while the biomass of sea scallops in the Middle Atlantic Bight increased by about eight times. These increases were primarily due to the area closures. Biomass in the Georges Bank closed areas was 25 times higher in 2005 than in 1994, and the 2005 level constituted over 80% of the biomass in the U.S. portion of Georges Bank. Substantia... |
| Databáze: | OpenAIRE |
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