Limb injuries in crabs from the western Bering Sea (Crustacea Decapoda: Brachyura Majidae, Anomura Lithodidae)
Studies of injuries in crabs (limb losses) are of interest inasmuch as (1) limb losses result in a marketable crab stock reduction, (2) the level of mutilation can serve as an index of fishery intensity, (3) injured crabs, unfit for processing and returned into the sea by fishermen when sorting out...
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Veröffentlicht in: | Arthropoda selecta 1994-01, Vol.3 (3/4), p.33-56 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Studies of injuries in crabs (limb losses) are of interest inasmuch as (1) limb losses result in a marketable crab stock reduction, (2) the level of mutilation can serve as an index of fishery intensity, (3) injured crabs, unfit for processing and returned into the sea by fishermen when sorting out the hauls, may help obtain unbiassed estimates of population parameters despite selective removal from the population of standard quality crabs, (4) data on limb losses can be useful for studying crab behaviour, and (5) the mutilation level should be taken into account in developing fishery regulation measures. The terms and coefficients used in limb loss characteristics are discussed. Evidence is provided for limb losses in population of shelf (Chionoecetes opilio, C. bairdi, Paralithodes platypus) and bathyal (C. angulatus, C. tanneri, Lithodes aequispina, L. couesi) species in 5 western Bering Sea areas, based on commercial pot catches in 1991 and 1992. Effect of injuries on the marketable crab stock and the possibility of cartographic presentation of limb loss data are discussed. |
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ISSN: | 0136-006X |