A natural experiment of dietary overlap between introduced Rainbow Trout (Oncorhynchus mykiss) and native Puyen (Galaxias maculatus) in the Santa Cruz River, Patagonia
Diet overlap between the native Puyen (Galaxias maculatus) and juvenile exotic Rainbow Trout (Oncorhynchus mykiss) was studied in 52 sites located along 306 km of the mainstem of the Santa Cruz River, one of the largest rivers in Patagonia. The relative abundance of both species varied along the riv...
Published in: | Environmental Biology of Fishes |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Springer
|
Subjects: | |
Online Access: | http://hdl.handle.net/11336/10292 |
id |
ftconicet:oai:ri.conicet.gov.ar:11336/10292 |
---|---|
record_format |
openpolar |
spelling |
ftconicet:oai:ri.conicet.gov.ar:11336/10292 2023-10-09T21:46:20+02:00 A natural experiment of dietary overlap between introduced Rainbow Trout (Oncorhynchus mykiss) and native Puyen (Galaxias maculatus) in the Santa Cruz River, Patagonia Tagliaferro, Marina Beatriz Arismendi, Ivan Lancelotti, Julio Lucio Pascual, Miguel Alberto application/pdf http://hdl.handle.net/11336/10292 eng eng Springer info:eu-repo/semantics/altIdentifier/doi/10.1007/s10641-014-0360-6 info:eu-repo/semantics/altIdentifier/url/http://link.springer.com/article/10.1007%2Fs10641-014-0360-6 http://hdl.handle.net/11336/10292 Tagliaferro, Marina Beatriz; Arismendi, Ivan; Lancelotti, Julio Lucio; Pascual, Miguel Alberto; A natural experiment of dietary overlap between introduced Rainbow Trout (Oncorhynchus mykiss) and native Puyen (Galaxias maculatus) in the Santa Cruz River, Patagonia; Springer; Environmental Biology of Fishes; 98; 5; 22-10-2014; 1311-1325 0378-1909 info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ Feeding Tactics Galaxiids N-Mds Trout Invasion https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1007/s10641-014-0360-6 2023-09-24T19:55:05Z Diet overlap between the native Puyen (Galaxias maculatus) and juvenile exotic Rainbow Trout (Oncorhynchus mykiss) was studied in 52 sites located along 306 km of the mainstem of the Santa Cruz River, one of the largest rivers in Patagonia. The relative abundance of both species varied along the river, with three clearly defined areas including an upstream “high Rainbow Trout to Puyen ratio” area (with abundances of 75 and 25 %, respectively), a midstream “intermediate Rainbow Trout to Puyen ratio” area (relative abundances between 75 and 25 %), and a downstream “low Rainbow Trout to Puyen ratio” area. The diet of the 2 species was analyzed across these 3 areas examining stomach content. Diet similarity between species was analyzed using a non-metric multidimensional scaling ordination technique; prey electivity was evaluated with the Ivlev’s Index; feeding tactics were studied by estimating prey-specific abundance. Both species showed a generalist feeding tactic, with Puyen exhibiting a more varied diet. Prey electivity was similar in both species, with the mayfly (Meridialaris chiloeensis), stoneflies (Klapopteryx kuscheli and Antarctoperla michaelseni), and the amphipod (Hyalella sp.) being the most frequently consumed prey. A significant diet overlap was found only in the downstream areas where a higher proportion of native fish occurs. The low diet overlap in upstream locations might be because of the high density of Rainbow Trout; while mid-stream could be due to the high secondary productivity spots. Our results suggest that the diet of native Puyen changed in relation to the abundances of Rainbow Trout in the stream. Fil: Tagliaferro, Marina Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina. Universidad Nacional de Luján. Departamento de Ciencias Básicas; Argentina Fil: Arismendi, Ivan. State University of Oregon; Estados Unidos Fil: Lancelotti, Julio Lucio. Consejo Nacional de Investigaciones ... Article in Journal/Newspaper Antarc* CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Patagonia Argentina Environmental Biology of Fishes 98 5 1311 1325 |
institution |
Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
Feeding Tactics Galaxiids N-Mds Trout Invasion https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
spellingShingle |
Feeding Tactics Galaxiids N-Mds Trout Invasion https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 Tagliaferro, Marina Beatriz Arismendi, Ivan Lancelotti, Julio Lucio Pascual, Miguel Alberto A natural experiment of dietary overlap between introduced Rainbow Trout (Oncorhynchus mykiss) and native Puyen (Galaxias maculatus) in the Santa Cruz River, Patagonia |
topic_facet |
Feeding Tactics Galaxiids N-Mds Trout Invasion https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
description |
Diet overlap between the native Puyen (Galaxias maculatus) and juvenile exotic Rainbow Trout (Oncorhynchus mykiss) was studied in 52 sites located along 306 km of the mainstem of the Santa Cruz River, one of the largest rivers in Patagonia. The relative abundance of both species varied along the river, with three clearly defined areas including an upstream “high Rainbow Trout to Puyen ratio” area (with abundances of 75 and 25 %, respectively), a midstream “intermediate Rainbow Trout to Puyen ratio” area (relative abundances between 75 and 25 %), and a downstream “low Rainbow Trout to Puyen ratio” area. The diet of the 2 species was analyzed across these 3 areas examining stomach content. Diet similarity between species was analyzed using a non-metric multidimensional scaling ordination technique; prey electivity was evaluated with the Ivlev’s Index; feeding tactics were studied by estimating prey-specific abundance. Both species showed a generalist feeding tactic, with Puyen exhibiting a more varied diet. Prey electivity was similar in both species, with the mayfly (Meridialaris chiloeensis), stoneflies (Klapopteryx kuscheli and Antarctoperla michaelseni), and the amphipod (Hyalella sp.) being the most frequently consumed prey. A significant diet overlap was found only in the downstream areas where a higher proportion of native fish occurs. The low diet overlap in upstream locations might be because of the high density of Rainbow Trout; while mid-stream could be due to the high secondary productivity spots. Our results suggest that the diet of native Puyen changed in relation to the abundances of Rainbow Trout in the stream. Fil: Tagliaferro, Marina Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina. Universidad Nacional de Luján. Departamento de Ciencias Básicas; Argentina Fil: Arismendi, Ivan. State University of Oregon; Estados Unidos Fil: Lancelotti, Julio Lucio. Consejo Nacional de Investigaciones ... |
format |
Article in Journal/Newspaper |
author |
Tagliaferro, Marina Beatriz Arismendi, Ivan Lancelotti, Julio Lucio Pascual, Miguel Alberto |
author_facet |
Tagliaferro, Marina Beatriz Arismendi, Ivan Lancelotti, Julio Lucio Pascual, Miguel Alberto |
author_sort |
Tagliaferro, Marina Beatriz |
title |
A natural experiment of dietary overlap between introduced Rainbow Trout (Oncorhynchus mykiss) and native Puyen (Galaxias maculatus) in the Santa Cruz River, Patagonia |
title_short |
A natural experiment of dietary overlap between introduced Rainbow Trout (Oncorhynchus mykiss) and native Puyen (Galaxias maculatus) in the Santa Cruz River, Patagonia |
title_full |
A natural experiment of dietary overlap between introduced Rainbow Trout (Oncorhynchus mykiss) and native Puyen (Galaxias maculatus) in the Santa Cruz River, Patagonia |
title_fullStr |
A natural experiment of dietary overlap between introduced Rainbow Trout (Oncorhynchus mykiss) and native Puyen (Galaxias maculatus) in the Santa Cruz River, Patagonia |
title_full_unstemmed |
A natural experiment of dietary overlap between introduced Rainbow Trout (Oncorhynchus mykiss) and native Puyen (Galaxias maculatus) in the Santa Cruz River, Patagonia |
title_sort |
natural experiment of dietary overlap between introduced rainbow trout (oncorhynchus mykiss) and native puyen (galaxias maculatus) in the santa cruz river, patagonia |
publisher |
Springer |
url |
http://hdl.handle.net/11336/10292 |
geographic |
Patagonia Argentina |
geographic_facet |
Patagonia Argentina |
genre |
Antarc* |
genre_facet |
Antarc* |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1007/s10641-014-0360-6 info:eu-repo/semantics/altIdentifier/url/http://link.springer.com/article/10.1007%2Fs10641-014-0360-6 http://hdl.handle.net/11336/10292 Tagliaferro, Marina Beatriz; Arismendi, Ivan; Lancelotti, Julio Lucio; Pascual, Miguel Alberto; A natural experiment of dietary overlap between introduced Rainbow Trout (Oncorhynchus mykiss) and native Puyen (Galaxias maculatus) in the Santa Cruz River, Patagonia; Springer; Environmental Biology of Fishes; 98; 5; 22-10-2014; 1311-1325 0378-1909 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1007/s10641-014-0360-6 |
container_title |
Environmental Biology of Fishes |
container_volume |
98 |
container_issue |
5 |
container_start_page |
1311 |
op_container_end_page |
1325 |
_version_ |
1779322019535388672 |