INVESTIGADORES
GIBERTO Diego Agustin
artículos
Título:
Synoptic postfishery structure of invertebrate bycatch associated to Zygochlamys patagonica fishing grounds at SW Atlantic shelf-break front (39°S, Argentina)
Autor/es:
BREMEC, C.S.; SCHEJTER, L.; GIBERTO, D.A.
Revista:
JOURNAL OF SHELLFISH RESEARCH
Editorial:
NATL SHELLFISHERIES ASSOC
Referencias:
Año: 2015 vol. 34 p. 729 - 736
ISSN:
0730-8000
Resumen:
Biological data were collected in a Patagonian scallop fishing ground,between 39°00? and 39°50? S and between 87-130 m depth. During 2007, we sampledthe following stations where the trawling exerted could be precisely determined: 11 locationssubjected to continuous fishing effort between 1996 and 2006 (continuousfishing effort, 878 commercial tows) and 12 locations subjected to fishingeffort between 1996 and 2002 (interrupted fishing effort, 302 commercial tows).Univariate (species richness, Shannon?s diversity index and Pielou?sequitability index) and multivariate analysis, ANOVA and Kruskal Wallis testswere applied to analyze species composition and biomass. This study reflectsthe significant higher density of sessile taxa (Porifera and the ascidean Paramolgula gregaria) and two small ophiuroids(Ophiacantha vivipara and Ophiura lymanii), all of themconspicuous during the exploratory cruises conducted in 1995, in the siteswhere fishing effort was interrupted 4 years before the sampling in 2007 thanin those sites continuously exploited and discusses the results consideringprevious knowledge on the damage that the process on board scallopers imparts on invertebrates by-catch.