Show simple item record

dc.creatorAlvarez Perez,José Angel
dc.creatorNascimento Silva,Tiago
dc.creatorSchroeder,Rafael
dc.creatorSchwarz,Richard
dc.creatorSilvestre Martins,Rodrigo
dc.date2009-01-01
dc.date.accessioned2019-05-03T13:26:59Z
dc.date.available2019-05-03T13:26:59Z
dc.identifierhttps://scielo.conicyt.cl/scielo.php?script=sci_arttext&pid=S0718-560X2009000300011
dc.identifier.urihttp://revistaschilenas.uchile.cl/handle/2250/87628
dc.descriptionCommercial exploitation of the Argentine shortfin squid (Illex argentinus) was virtually non-existent in Brazilian waters until 2000 when foreign trawlers initiated their operations on slope grounds as part of a government-induced chartering program. Since then, the species has been included among the targets of a developing slope trawl fishing off southeastern and southern Brazil. Biological samples were collected from commercial catches of 25 national and seven foreign (chartered) trawlers between 23°-33°S and 170-740 m depth. These samples represent two periods of the commercial exploitation of Illex argentinus in Brazil: 2001-2003, when both chartered and national trawlers operated simultaneously, and 2006-2007, when only national vessels continued to exploit I. argentinus along with other slope stocks. Catches contained immature and ma-turing squid throughout the year, as well as at least two distinct, fully mature, spawning groups: one composed of small-sized males and females present year-round on the shelf-break/ upper slope (< 400 m), and the other consisting of large squid present only in austral winter-spring in southern (26°-29°S ) and deep fishing grounds (400-700 m). The latter group has sustained the large winter catches reported since 2000 and the large sizes and concentrations of the specimens sparked the interest of the fishing industry as a potential target of the slope fishery. The reproductive attributes and temporal/ spatial distribution patterns of winter spawners support the hypothesis that relates this group to migrating concentrations of a north Patagonian shelf stock. If confirmed, the present data would underscore the need to consider multinational shared stock management strategies in the SW Atlantic.
dc.formattext/html
dc.languageen
dc.publisherPontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar
dc.relation10.4067/S0718-560X2009000300011
dc.rightsinfo:eu-repo/semantics/openAccess
dc.sourceLatin american journal of aquatic research v.37 n.3 2009
dc.subjectommastrephid squid
dc.subjectIllex argentinus
dc.subjectslope trawl fishery
dc.subjectsouthern Brazil
dc.titleBiological patterns of the Argentine shortfin squid Illex argentinus in the slope trawl fishery off Brazil


This item appears in the following Collection(s)

Show simple item record