CAMBIOS TEMPORALES EN LA DIETA DEL PLAYERO ROJIZO (CALIDRIS CANUTUS RUFA) EN UN HUMEDAL DE PENÍNSULA VALDÉS, PATAGONIA ARGENTINA
Temporal variation in the diet of the Red Knot (Calidris canutus rufa) in a wetland from Península Valdés, Patagonia Argentina. – During their northward migration, Red Knots forage extensively in intertidal areas of Península Valdés (Patagonia, Argentina). This species has a small population and dec...
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Neotropical Ornithological Society
2016
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ftjornneo:oai:ornneo.journals.sfu.ca:article/21 2024-09-15T18:00:46+00:00 CAMBIOS TEMPORALES EN LA DIETA DEL PLAYERO ROJIZO (CALIDRIS CANUTUS RUFA) EN UN HUMEDAL DE PENÍNSULA VALDÉS, PATAGONIA ARGENTINA Musmeci, Luciana R. Hernández, María de los Ángeles Bala, Luis O. Scolaro, José A. 2016-02-06 application/pdf https://journals.sfu.ca/ornneo/index.php/ornneo/article/view/21 https://doi.org/10.58843/ornneo.v26i2.21 eng eng Neotropical Ornithological Society https://journals.sfu.ca/ornneo/index.php/ornneo/article/view/21/13 https://journals.sfu.ca/ornneo/index.php/ornneo/article/view/21 doi:10.58843/ornneo.v26i2.21 Copyright (c) 2015 Ornitología Neotropical Ornitología Neotropical; Vol. 26 No. 2; 129-142 1075-4377 10.58843/ornneo.v26i2 Calidris canutus rufa clams Colombo Beach Darina solenoides diet polychaetes Red Knot shorebirds Travisia olens info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article 2016 ftjornneo https://doi.org/10.58843/ornneo.v26i2.2110.58843/ornneo.v26i2 2024-07-12T03:14:39Z Temporal variation in the diet of the Red Knot (Calidris canutus rufa) in a wetland from Península Valdés, Patagonia Argentina. – During their northward migration, Red Knots forage extensively in intertidal areas of Península Valdés (Patagonia, Argentina). This species has a small population and declines have been linked to reduced prey availability in migratory stopover sites. Thus, knowing the temporal variation in prey availability and diet is essential to understand population dynamics in the Red Knot. We studied temporal variation in the diet of the Red Knot at Colombo Beach (northeastern Nuevo Gulf, Península Valdés). To evaluate prey availability, we sampled benthic invertebrates in March every study year. We collected 292 feces during April in 2002, 2003, 2006, and 2007. Prey items were identified by using key hard structures. The clam Darina solenoides was the most common prey positively selected every year (Savage index), although in some years the polychaete Travisia olens was also selected. Other, less important prey items were seeds, mussels, insects, crustaceans, isopods, amphipods, ostracods, the snail Buccinanops globulosus, and the clam Tellina petitiana. Red Knots selected clams in variable size ranges depending on the year (10–18 mm in 2002, 8–22 mm in 2003, 10–20 in 2006, and 18–26 mm in 2007 mm). In the years where the contribution to biomass by the clam D. solenoids was lower, knots had a higher trophic diversity. Diet composition varied between years mainly due to differences in the intake of polychaetes. Article in Journal/Newspaper Calidris canutus Red Knot Ornitología Neotropical |
institution |
Open Polar |
collection |
Ornitología Neotropical |
op_collection_id |
ftjornneo |
language |
English |
topic |
Calidris canutus rufa clams Colombo Beach Darina solenoides diet polychaetes Red Knot shorebirds Travisia olens |
spellingShingle |
Calidris canutus rufa clams Colombo Beach Darina solenoides diet polychaetes Red Knot shorebirds Travisia olens Musmeci, Luciana R. Hernández, María de los Ángeles Bala, Luis O. Scolaro, José A. CAMBIOS TEMPORALES EN LA DIETA DEL PLAYERO ROJIZO (CALIDRIS CANUTUS RUFA) EN UN HUMEDAL DE PENÍNSULA VALDÉS, PATAGONIA ARGENTINA |
topic_facet |
Calidris canutus rufa clams Colombo Beach Darina solenoides diet polychaetes Red Knot shorebirds Travisia olens |
description |
Temporal variation in the diet of the Red Knot (Calidris canutus rufa) in a wetland from Península Valdés, Patagonia Argentina. – During their northward migration, Red Knots forage extensively in intertidal areas of Península Valdés (Patagonia, Argentina). This species has a small population and declines have been linked to reduced prey availability in migratory stopover sites. Thus, knowing the temporal variation in prey availability and diet is essential to understand population dynamics in the Red Knot. We studied temporal variation in the diet of the Red Knot at Colombo Beach (northeastern Nuevo Gulf, Península Valdés). To evaluate prey availability, we sampled benthic invertebrates in March every study year. We collected 292 feces during April in 2002, 2003, 2006, and 2007. Prey items were identified by using key hard structures. The clam Darina solenoides was the most common prey positively selected every year (Savage index), although in some years the polychaete Travisia olens was also selected. Other, less important prey items were seeds, mussels, insects, crustaceans, isopods, amphipods, ostracods, the snail Buccinanops globulosus, and the clam Tellina petitiana. Red Knots selected clams in variable size ranges depending on the year (10–18 mm in 2002, 8–22 mm in 2003, 10–20 in 2006, and 18–26 mm in 2007 mm). In the years where the contribution to biomass by the clam D. solenoids was lower, knots had a higher trophic diversity. Diet composition varied between years mainly due to differences in the intake of polychaetes. |
format |
Article in Journal/Newspaper |
author |
Musmeci, Luciana R. Hernández, María de los Ángeles Bala, Luis O. Scolaro, José A. |
author_facet |
Musmeci, Luciana R. Hernández, María de los Ángeles Bala, Luis O. Scolaro, José A. |
author_sort |
Musmeci, Luciana R. |
title |
CAMBIOS TEMPORALES EN LA DIETA DEL PLAYERO ROJIZO (CALIDRIS CANUTUS RUFA) EN UN HUMEDAL DE PENÍNSULA VALDÉS, PATAGONIA ARGENTINA |
title_short |
CAMBIOS TEMPORALES EN LA DIETA DEL PLAYERO ROJIZO (CALIDRIS CANUTUS RUFA) EN UN HUMEDAL DE PENÍNSULA VALDÉS, PATAGONIA ARGENTINA |
title_full |
CAMBIOS TEMPORALES EN LA DIETA DEL PLAYERO ROJIZO (CALIDRIS CANUTUS RUFA) EN UN HUMEDAL DE PENÍNSULA VALDÉS, PATAGONIA ARGENTINA |
title_fullStr |
CAMBIOS TEMPORALES EN LA DIETA DEL PLAYERO ROJIZO (CALIDRIS CANUTUS RUFA) EN UN HUMEDAL DE PENÍNSULA VALDÉS, PATAGONIA ARGENTINA |
title_full_unstemmed |
CAMBIOS TEMPORALES EN LA DIETA DEL PLAYERO ROJIZO (CALIDRIS CANUTUS RUFA) EN UN HUMEDAL DE PENÍNSULA VALDÉS, PATAGONIA ARGENTINA |
title_sort |
cambios temporales en la dieta del playero rojizo (calidris canutus rufa) en un humedal de península valdés, patagonia argentina |
publisher |
Neotropical Ornithological Society |
publishDate |
2016 |
url |
https://journals.sfu.ca/ornneo/index.php/ornneo/article/view/21 https://doi.org/10.58843/ornneo.v26i2.21 |
genre |
Calidris canutus Red Knot |
genre_facet |
Calidris canutus Red Knot |
op_source |
Ornitología Neotropical; Vol. 26 No. 2; 129-142 1075-4377 10.58843/ornneo.v26i2 |
op_relation |
https://journals.sfu.ca/ornneo/index.php/ornneo/article/view/21/13 https://journals.sfu.ca/ornneo/index.php/ornneo/article/view/21 doi:10.58843/ornneo.v26i2.21 |
op_rights |
Copyright (c) 2015 Ornitología Neotropical |
op_doi |
https://doi.org/10.58843/ornneo.v26i2.2110.58843/ornneo.v26i2 |
_version_ |
1810437940659093504 |