The Argentine short-finned squid Illex argentinus in the food webs of southern Brazil
Autor(a) principal: | |
---|---|
Data de Publicação: | 2000 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da FURG (RI FURG) |
Texto Completo: | http://repositorio.furg.br/handle/1/2957 |
Resumo: | Predation on Illex argentinus (Cephalopoda, Ommastrephidae) in southern Brazil (26°S to 34°S) was studied from its presence in contents of over 14 000 stomachs from 63 potential predator species including fishes, cephalopods, penguins and marine mammals. The size composition of I. argentinus in the diet of their main predators was estimated using regression equations that relate mantle length and body weight to beak size. The short-finned squid was found in the diet of 32 species and appears to play an important role in the trophic relations along the upper slope and adjacent oceanic waters, where it was found in the diet of the swordfish Xiphias gladius, the tunas Thunnus obesus, T. alalunga and T. albacares, and the wreckfish Polyprion americanus. These five species stand for more than half of the landings from the upper slope demersal and oceanic pelagic fisheries in the region. On the shelf, where the dominant squid was Loligo sanpaulensis, Illex argentinus was only occasionally found in the diet of a few neritic predators. In southern Brazil, overall predation was more intense on subadults and adults of the winter-spring spawning group on the upper slope and oceanic adjacent waters, differently from its southern range along Uruguay and Argentina waters where the short-finned squid is abundant on the shelf and is preyed upon mainly by the demersal fish assemblage. |
id |
FURG_687f7bc5bf2379b3e1c50ca4766c2472 |
---|---|
oai_identifier_str |
oai:repositorio.furg.br:1/2957 |
network_acronym_str |
FURG |
network_name_str |
Repositório Institucional da FURG (RI FURG) |
repository_id_str |
|
spelling |
The Argentine short-finned squid Illex argentinus in the food webs of southern BrazilOmmastrephidaeIllex argentinusSquidFood websBrazilSouthwestern AtlanticPredation on Illex argentinus (Cephalopoda, Ommastrephidae) in southern Brazil (26°S to 34°S) was studied from its presence in contents of over 14 000 stomachs from 63 potential predator species including fishes, cephalopods, penguins and marine mammals. The size composition of I. argentinus in the diet of their main predators was estimated using regression equations that relate mantle length and body weight to beak size. The short-finned squid was found in the diet of 32 species and appears to play an important role in the trophic relations along the upper slope and adjacent oceanic waters, where it was found in the diet of the swordfish Xiphias gladius, the tunas Thunnus obesus, T. alalunga and T. albacares, and the wreckfish Polyprion americanus. These five species stand for more than half of the landings from the upper slope demersal and oceanic pelagic fisheries in the region. On the shelf, where the dominant squid was Loligo sanpaulensis, Illex argentinus was only occasionally found in the diet of a few neritic predators. In southern Brazil, overall predation was more intense on subadults and adults of the winter-spring spawning group on the upper slope and oceanic adjacent waters, differently from its southern range along Uruguay and Argentina waters where the short-finned squid is abundant on the shelf and is preyed upon mainly by the demersal fish assemblage.2012-12-06T18:37:59Z2012-12-06T18:37:59Z2000info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfSANTOS, Roberta Aguiar dos; HAIMOVICI, Manuel. The Argentine short-finned squid Illex argentinus in the food webs of southern Brazil. Sarsia, v. 85, p. 49-60, 2000. Disponível em: <http://www.demersais.furg.br/Files/2000.Santos.Haimovici.Illex.argentinus.in.the.food.webs.Sarsia.pdf>. Acesso em: 30 jun. 2012.http://repositorio.furg.br/handle/1/2957engSantos, Roberta Aguiar dosHaimovici, Manuelinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da FURG (RI FURG)instname:Universidade Federal do Rio Grande (FURG)instacron:FURG2012-12-06T18:37:59Zoai:repositorio.furg.br:1/2957Repositório InstitucionalPUBhttps://repositorio.furg.br/oai/request || http://200.19.254.174/oai/requestopendoar:2012-12-06T18:37:59Repositório Institucional da FURG (RI FURG) - Universidade Federal do Rio Grande (FURG)false |
dc.title.none.fl_str_mv |
The Argentine short-finned squid Illex argentinus in the food webs of southern Brazil |
title |
The Argentine short-finned squid Illex argentinus in the food webs of southern Brazil |
spellingShingle |
The Argentine short-finned squid Illex argentinus in the food webs of southern Brazil Santos, Roberta Aguiar dos Ommastrephidae Illex argentinus Squid Food webs Brazil Southwestern Atlantic |
title_short |
The Argentine short-finned squid Illex argentinus in the food webs of southern Brazil |
title_full |
The Argentine short-finned squid Illex argentinus in the food webs of southern Brazil |
title_fullStr |
The Argentine short-finned squid Illex argentinus in the food webs of southern Brazil |
title_full_unstemmed |
The Argentine short-finned squid Illex argentinus in the food webs of southern Brazil |
title_sort |
The Argentine short-finned squid Illex argentinus in the food webs of southern Brazil |
author |
Santos, Roberta Aguiar dos |
author_facet |
Santos, Roberta Aguiar dos Haimovici, Manuel |
author_role |
author |
author2 |
Haimovici, Manuel |
author2_role |
author |
dc.contributor.author.fl_str_mv |
Santos, Roberta Aguiar dos Haimovici, Manuel |
dc.subject.por.fl_str_mv |
Ommastrephidae Illex argentinus Squid Food webs Brazil Southwestern Atlantic |
topic |
Ommastrephidae Illex argentinus Squid Food webs Brazil Southwestern Atlantic |
description |
Predation on Illex argentinus (Cephalopoda, Ommastrephidae) in southern Brazil (26°S to 34°S) was studied from its presence in contents of over 14 000 stomachs from 63 potential predator species including fishes, cephalopods, penguins and marine mammals. The size composition of I. argentinus in the diet of their main predators was estimated using regression equations that relate mantle length and body weight to beak size. The short-finned squid was found in the diet of 32 species and appears to play an important role in the trophic relations along the upper slope and adjacent oceanic waters, where it was found in the diet of the swordfish Xiphias gladius, the tunas Thunnus obesus, T. alalunga and T. albacares, and the wreckfish Polyprion americanus. These five species stand for more than half of the landings from the upper slope demersal and oceanic pelagic fisheries in the region. On the shelf, where the dominant squid was Loligo sanpaulensis, Illex argentinus was only occasionally found in the diet of a few neritic predators. In southern Brazil, overall predation was more intense on subadults and adults of the winter-spring spawning group on the upper slope and oceanic adjacent waters, differently from its southern range along Uruguay and Argentina waters where the short-finned squid is abundant on the shelf and is preyed upon mainly by the demersal fish assemblage. |
publishDate |
2000 |
dc.date.none.fl_str_mv |
2000 2012-12-06T18:37:59Z 2012-12-06T18:37:59Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
SANTOS, Roberta Aguiar dos; HAIMOVICI, Manuel. The Argentine short-finned squid Illex argentinus in the food webs of southern Brazil. Sarsia, v. 85, p. 49-60, 2000. Disponível em: <http://www.demersais.furg.br/Files/2000.Santos.Haimovici.Illex.argentinus.in.the.food.webs.Sarsia.pdf>. Acesso em: 30 jun. 2012. http://repositorio.furg.br/handle/1/2957 |
identifier_str_mv |
SANTOS, Roberta Aguiar dos; HAIMOVICI, Manuel. The Argentine short-finned squid Illex argentinus in the food webs of southern Brazil. Sarsia, v. 85, p. 49-60, 2000. Disponível em: <http://www.demersais.furg.br/Files/2000.Santos.Haimovici.Illex.argentinus.in.the.food.webs.Sarsia.pdf>. Acesso em: 30 jun. 2012. |
url |
http://repositorio.furg.br/handle/1/2957 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da FURG (RI FURG) instname:Universidade Federal do Rio Grande (FURG) instacron:FURG |
instname_str |
Universidade Federal do Rio Grande (FURG) |
instacron_str |
FURG |
institution |
FURG |
reponame_str |
Repositório Institucional da FURG (RI FURG) |
collection |
Repositório Institucional da FURG (RI FURG) |
repository.name.fl_str_mv |
Repositório Institucional da FURG (RI FURG) - Universidade Federal do Rio Grande (FURG) |
repository.mail.fl_str_mv |
|
_version_ |
1807384382408753152 |