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Book (series)Synopsis of biological data on the western rock lobster Panulirus cygnus, George 1962 1980
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DocumentStock assessment for the rock lobster Panulirus homarus inhabiting the coastal waters of the People's Democratic Republic of Yemen 1984
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No results found.The report provides an assessment based principally on the sampling of catches at the Mukalla Cold Store and associated landing sites during the three seasons from and including 1980/81. Cohort identities were established using the method of Bhattacharya. Spawning was concluded as occurring twice each year; in the month prior to February and again sometime between May and October. Yield per recruit analyses indicated that modest increases in annual catch would result from increasing the fishing mortality coefficient. To the extent of 6% more catch if the fishing mortality coefficient was increased by 25%; and 13% if the latter was increased by 67%. It was suggested that management action to seek these increases in annual catch might not be justified, particularly if associated with the introduction of substantial additional costs. In respect to the adjacent: fisheries for lobster, that: associated with the Thabut Cold Store was considered near to being fully exploited, while substantia l additional catch was suggested as possible from the fishery at Socotra. -
PresentationEcosystem-based fisheries management (EBFM) of Western Rock Lobster: taking account of climate change effects
Webinar 4: Opportunities for Ecosystem based Adaptation in Coastal and Marine Ecosystems
2018Also available in:
No results found.In Australia, the ecosystem approach to fisheries (EAF) identified two factors influenced by climate change that impact the fish/lobster production. Rising water temperatures had effects on the timing of egg development, including from deposition to hatching, while increased winter storms affected larval settlement. Other effects included changes in the size of migrating lobster, size at maturity and their growth. In order to have adaptation measures in place that led to some new management interventions based on the ecosystem approach to fisheries, it was crucial to monitor some of the environmental factors affecting fish/lobster production together with egg production and level of settlement. Furthermore, it was necessary to establish some harvesting strategies that were responsive to the monitored changes. The introduced management intervention was able to reduce fishing activities while at the same time increasing fish egg production. This had a positive effect on economics of the commercial fishery and social wellbeing of the recreational fishing communities.
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