Artisanal dredges as efficient and rationale harvesting gears in a Patagonian mussel fishery

► We used a methodology based on direct methods for estimates of selectivity (diving behind the dredge track). ► We identified a higher efficiency of the new dredge comparing with that of dredges used for shellfish worldwide and before 2000. ► The artisanal dredge was less species selective comparin...

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Bibliographic Details
Published in:Fisheries research 2011-09, Vol.111 (1), p.108-115
Main Authors: Narvarte, Maite, González, Raúl, Medina, Alonso, Avaca, María Soledad
Format: Article
Language:English
Subjects:
Animal, plant and microbial ecology
Applied ecology
Benthic dredge
Biological and medical sciences
Echinoidea
Efficiency
Exploitation and management of natural biological resources (hunting, fishing and exploited populations survey, etc.)
Fundamental and applied biological sciences. Psychology
Invertebrates
Marine
Mollusca
Patagonian coastal waters
Selectivity
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Summary:► We used a methodology based on direct methods for estimates of selectivity (diving behind the dredge track). ► We identified a higher efficiency of the new dredge comparing with that of dredges used for shellfish worldwide and before 2000. ► The artisanal dredge was less species selective comparing with commercial divers. ► Also, effects of dredging appeared to be focused in the removal of substrates. ► Changes of the gear design seem to have led to a significant reduction of the fishing effort and impact in San Matías Gulf mussel fishery. Dredges authorized to operate in shellfisheries of San Matías Gulf changed after 2000 from industrial (≈300 kg, 2.5 m wide) to smaller ones (≈50 kg, 1.6 m wide) exclusively operated by artisanal boats (
ISSN:0165-7836
1872-6763
DOI:10.1016/j.fishres.2011.07.002