Feeding habits and trophic interactions of Doryteuthis gahi, Illex argentinus and Onykia ingens in the marine ecosystem off the Patagonian Shelf
The stomach contents of three squids: 57 Doryteuthis gahi with mantle length (ML) ranging from 7.0 to 37.0 cm, 75 Illex argentinus (21.0–32.8 cm) and 116 Onykia ingens (19.9–39.3 cm) from commercial catches on the outer Patagonian shelf grounds during autumn (March and April 2012) were examined to d...
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Centro Oceanográfico de Vigo
2014
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Online Access: | http://hdl.handle.net/10508/1893 https://doi.org/10.1016/j.fishres.2013.11.004 |
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ftieo:oai:repositorio.ieo.es:10508/1893 2023-05-15T17:52:54+02:00 Feeding habits and trophic interactions of Doryteuthis gahi, Illex argentinus and Onykia ingens in the marine ecosystem off the Patagonian Shelf Rosas-Luis, R. (Rigoberto) Sánchez, P. (Pilar) Portela, J. (Julio) Río-Iglesias, J.L. (José Luis) del Atlantic Ocean South Atlantic Southwest Atlantic Patagonian Shelf 2014 http://hdl.handle.net/10508/1893 https://doi.org/10.1016/j.fishres.2013.11.004 unknown Centro Oceanográfico de Vigo http://hdl.handle.net/10508/1893 Fisheries Research, 152. 2014: 37-44 doi:10.1016/j.fishres.2013.11.004 Atribución-NoComercial-SinDerivadas 3.0 España http://creativecommons.org/licenses/by-nc-nd/3.0/es/ openAccess CC-BY-NC-ND article 2014 ftieo https://doi.org/10.1016/j.fishres.2013.11.004 2022-07-26T23:47:08Z The stomach contents of three squids: 57 Doryteuthis gahi with mantle length (ML) ranging from 7.0 to 37.0 cm, 75 Illex argentinus (21.0–32.8 cm) and 116 Onykia ingens (19.9–39.3 cm) from commercial catches on the outer Patagonian shelf grounds during autumn (March and April 2012) were examined to describe their diet and compare their trophic spectrum. D. gahi preyed on 12 different items, I. argentinus on 20 and O. ingens on 29. Prey diversity increased with the sizes of the squids. Along growth, D. gahi shifted from crustaceans, mainly euphausiids to fish (Salilota australis) and squid (D. gahi and Histioteuthis sp.). Small to mid-sized I. argentinus and O. ingens consumed mostly two fish, two squid species D. gahi and Histioteuthis atlantica, two crustaceans Munida gregaria and Munida subrugosa and the Chaetognatha Sagitta elegans. All the three species show a high prey overlapping at similar sizes: Squid of smaller size (5–15 cm ML) fed mainly on crustaceans: D. gahi on euphausiids and squat lobsters (Munididae). Mid-sized squid fed mainly on fish, most frequently Gymnoscopelus sp. and S. australis, and larger I. argentinus and O. ingens fed mostly on squids, including cannibalism. The overlapping of the diet of similar sized squid was large suggesting all preys are abundant species in autumn in the water column in the Patagonian Shelf. Versión del editor 2 Article in Journal/Newspaper Onykia ingens Instituto Español de Oceanografía: e-IEO Fisheries Research 152 37 44 |
institution |
Open Polar |
collection |
Instituto Español de Oceanografía: e-IEO |
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ftieo |
language |
unknown |
description |
The stomach contents of three squids: 57 Doryteuthis gahi with mantle length (ML) ranging from 7.0 to 37.0 cm, 75 Illex argentinus (21.0–32.8 cm) and 116 Onykia ingens (19.9–39.3 cm) from commercial catches on the outer Patagonian shelf grounds during autumn (March and April 2012) were examined to describe their diet and compare their trophic spectrum. D. gahi preyed on 12 different items, I. argentinus on 20 and O. ingens on 29. Prey diversity increased with the sizes of the squids. Along growth, D. gahi shifted from crustaceans, mainly euphausiids to fish (Salilota australis) and squid (D. gahi and Histioteuthis sp.). Small to mid-sized I. argentinus and O. ingens consumed mostly two fish, two squid species D. gahi and Histioteuthis atlantica, two crustaceans Munida gregaria and Munida subrugosa and the Chaetognatha Sagitta elegans. All the three species show a high prey overlapping at similar sizes: Squid of smaller size (5–15 cm ML) fed mainly on crustaceans: D. gahi on euphausiids and squat lobsters (Munididae). Mid-sized squid fed mainly on fish, most frequently Gymnoscopelus sp. and S. australis, and larger I. argentinus and O. ingens fed mostly on squids, including cannibalism. The overlapping of the diet of similar sized squid was large suggesting all preys are abundant species in autumn in the water column in the Patagonian Shelf. Versión del editor 2 |
format |
Article in Journal/Newspaper |
author |
Rosas-Luis, R. (Rigoberto) Sánchez, P. (Pilar) Portela, J. (Julio) Río-Iglesias, J.L. (José Luis) del |
spellingShingle |
Rosas-Luis, R. (Rigoberto) Sánchez, P. (Pilar) Portela, J. (Julio) Río-Iglesias, J.L. (José Luis) del Feeding habits and trophic interactions of Doryteuthis gahi, Illex argentinus and Onykia ingens in the marine ecosystem off the Patagonian Shelf |
author_facet |
Rosas-Luis, R. (Rigoberto) Sánchez, P. (Pilar) Portela, J. (Julio) Río-Iglesias, J.L. (José Luis) del |
author_sort |
Rosas-Luis, R. (Rigoberto) |
title |
Feeding habits and trophic interactions of Doryteuthis gahi, Illex argentinus and Onykia ingens in the marine ecosystem off the Patagonian Shelf |
title_short |
Feeding habits and trophic interactions of Doryteuthis gahi, Illex argentinus and Onykia ingens in the marine ecosystem off the Patagonian Shelf |
title_full |
Feeding habits and trophic interactions of Doryteuthis gahi, Illex argentinus and Onykia ingens in the marine ecosystem off the Patagonian Shelf |
title_fullStr |
Feeding habits and trophic interactions of Doryteuthis gahi, Illex argentinus and Onykia ingens in the marine ecosystem off the Patagonian Shelf |
title_full_unstemmed |
Feeding habits and trophic interactions of Doryteuthis gahi, Illex argentinus and Onykia ingens in the marine ecosystem off the Patagonian Shelf |
title_sort |
feeding habits and trophic interactions of doryteuthis gahi, illex argentinus and onykia ingens in the marine ecosystem off the patagonian shelf |
publisher |
Centro Oceanográfico de Vigo |
publishDate |
2014 |
url |
http://hdl.handle.net/10508/1893 https://doi.org/10.1016/j.fishres.2013.11.004 |
op_coverage |
Atlantic Ocean South Atlantic Southwest Atlantic Patagonian Shelf |
genre |
Onykia ingens |
genre_facet |
Onykia ingens |
op_relation |
http://hdl.handle.net/10508/1893 Fisheries Research, 152. 2014: 37-44 doi:10.1016/j.fishres.2013.11.004 |
op_rights |
Atribución-NoComercial-SinDerivadas 3.0 España http://creativecommons.org/licenses/by-nc-nd/3.0/es/ openAccess |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1016/j.fishres.2013.11.004 |
container_title |
Fisheries Research |
container_volume |
152 |
container_start_page |
37 |
op_container_end_page |
44 |
_version_ |
1766160660848181248 |