Results 241 to 250 of about 251,647 (287)
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The demersal fishery in the Clyde Sea Area
Proceedings of the Royal Society of Edinburgh. Section B. Biological Sciences, 1986SynopsisData from the Clyde demersal fishery during the period 1960 to 1984 are presented. Annual landings of demersal species at Chde ports in recent years have ranged from 4000 to 10,000 tonnes, with a first sale value of £2–5 million. In the 1960s the fishery was undertaken mainly by seine-net vessels, but the present fleet consists largely of dual ...
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Potential vulnerability of demersal fisheries to Western Mediterranean warming
2020<p>Western Mediterranean Sea is immersed in a warming process, at least since the beginning of the XX century. Moreover, climate simulations project an accelerated warming at all depths for the next decades. The effects of sea warming on demersal species of high commercial interest is an open question of paramount relevance for ...
Joaquim Tomàs-Ferrer +4 more
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SSRN Electronic Journal, 2010
In this paper, production surplus function and Pontryagin Maximum Principles were used as the approach for optimum allocation. Production surplus function and Pontryagin Maximum Principles were used as the approach for optimum allocation. Biological parameter, such as r, q, and K estimated with Walters-Hilbron (WH: 1976) and CYP (1992) estimator models.
Yudi Wahyudin +2 more
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In this paper, production surplus function and Pontryagin Maximum Principles were used as the approach for optimum allocation. Production surplus function and Pontryagin Maximum Principles were used as the approach for optimum allocation. Biological parameter, such as r, q, and K estimated with Walters-Hilbron (WH: 1976) and CYP (1992) estimator models.
Yudi Wahyudin +2 more
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A Numerical Model of the Icelandic Demersal Fisheries
1990This paper presents an empirical multi-species, multi-fleet dynamic optimization model for the Icelandic demersal fisheries. The structure of the model and key empirical relationships are described. Simulation exercises are performed. Methods for searching for efficient harvesting programs are discussed.
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Energy saving trawl in Mediterranean demersal fisheries
2007This study aimed at the development of demersal trawl design, for the Mediterranean fisheries, with reduced fuel consumption. The new design include the use of a new high strength material and the use of larger meshes in net areas where no negative effect on the catching power is foreseen.
Sala A, Lucchetti A, Palumbo V, Hansen K
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The issue of bycatch in Australia's demersal trawl fisheries
Reviews in Fish Biology and Fisheries, 1995A common definition of the term ‘bycatch’ is that part of the gross catch which is captured incidentally to the species towards which there is directed effort. Under such a definition, there are few fisheries in Australia (nor the world) which do not have bycatch, making the scope, diversity and history of the issue enormous.
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Status of demersal fishery resources of Malaysia [PDF]
Research trawl surveys have been conducted in four areas of Malaysian waters (west and east coast of Peninsular Malaysia, and waters off the coast of Sarawak and off the west coast of Sabah) since 1970. Selected surveys (1972 - 98) were used to examine the status of demersal fishery resources in each area, focusing on catch rate and biomass trends ...
Ahmad, A.T. +3 more
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A multi-criteria assessment of fishing gear impacts in demersal fisheries
Journal of Environmental Management, 2010Fishing gears have multiple impacts on the marine environment, and policies to reduce these impacts through modifying fishing gears are becoming common place. Different modifications result in different changes in the set of environmental impacts, and imply different sets of costs and benefits for different stakeholder groups.
James P, Innes, Sean, Pascoe
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Global meta‐analysis of demersal fishing impacts on organic carbon and associated biogeochemistry
Fish and FisheriesThe potential threat of fisheries on seabed carbon is a topic of growing concern, yet existing literature presents inconsistencies leaving experts divided on the topic.
J. Tiano +10 more
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Biomass spectrum analysis of the Nigerian inshore demersal fishery
Journal of Applied Ichthyology, 1993Summary An investigation of catches of 12 commercial fish species and species groups from the Nigerian inshore trawl fishery between 1971 and 1987, indicated that total catch-per-unit effort (CPUE) of all species was less variable among these years than the CPUE of most individual species or species grous Some possible causes for the large ...
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