Delayed predator−prey collapses: The case of black-legged kittiwakes and Iberian sardines
We analysed the long-term (1975−2017) population response of a colony of a marine top predator, the black-legged kittiwake Rissa tridactyla, to the population dynamics of sardine Sardina pilchardus, its main local prey. The study site (Sisargas Islands, Spain) is located at the southernmost edge of...
Published in: | Marine Ecology Progress Series |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
Inter Research
2019
|
Subjects: | |
Online Access: | http://hdl.handle.net/10261/204229 https://doi.org/10.3354/meps13164 |
id |
ftcsic:oai:digital.csic.es:10261/204229 |
---|---|
record_format |
openpolar |
spelling |
ftcsic:oai:digital.csic.es:10261/204229 2024-02-11T10:02:35+01:00 Delayed predator−prey collapses: The case of black-legged kittiwakes and Iberian sardines Martínez-Abraín, Alejandro Santidrián Tomillo, Pilar Mouriño, J. Tenan, Simone Oro, Daniel 2019-11-21 http://hdl.handle.net/10261/204229 https://doi.org/10.3354/meps13164 unknown Inter Research http://doi.org/10.3354/meps13164 Sí Marine Ecology Progress Series 631: 201-207 (2019) 0171-8630 http://hdl.handle.net/10261/204229 doi:10.3354/meps13164 1616-1599 none artículo http://purl.org/coar/resource_type/c_6501 2019 ftcsic https://doi.org/10.3354/meps13164 2024-01-16T10:50:14Z We analysed the long-term (1975−2017) population response of a colony of a marine top predator, the black-legged kittiwake Rissa tridactyla, to the population dynamics of sardine Sardina pilchardus, its main local prey. The study site (Sisargas Islands, Spain) is located at the southernmost edge of the geographical distribution of the predator. Kittiwake counts of breeding pairs started with the discovery of the colony (1975), likely close to the actual year of first colonization. Sardine landings by age class (1978−2016) were taken from the International Council for the Exploration of the Sea (ICES) database. Sequential t-test analysis revealed that a regime shift of the oldest sardine age class (age 6+) took place in 1991 and that kittiwakes experienced a regime shift in the number of breeding pairs in 1993, 2 yr after the prey shift. Multiple autocorrelation functions for the detrended time series of sardines and kittiwakes indicated an autocorrelation with a time lag of 2 yr. Despite much reduced fishing effort, sardine densities have not recovered since the collapse, likely due to changes in large-scale atmospheric circulation in the Northern Hemisphere in the late 1990s. Kittiwakes at Sisargas have not recovered demographically, remaining nearly extinct during the last ca. 20 yr. Although we lack detailed demographic data for the studied kittiwake population, we suggest that massive breeding failure and subsequent dispersal to higher-quality patches might explain the rapid non-linear collapse in breeding population density. We discuss some behavioural social responses that may have occurred during and after the collapse to explain the dynamics of the study colony. Article in Journal/Newspaper Black-legged Kittiwake rissa tridactyla Digital.CSIC (Spanish National Research Council) Marine Ecology Progress Series 631 201 207 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
unknown |
description |
We analysed the long-term (1975−2017) population response of a colony of a marine top predator, the black-legged kittiwake Rissa tridactyla, to the population dynamics of sardine Sardina pilchardus, its main local prey. The study site (Sisargas Islands, Spain) is located at the southernmost edge of the geographical distribution of the predator. Kittiwake counts of breeding pairs started with the discovery of the colony (1975), likely close to the actual year of first colonization. Sardine landings by age class (1978−2016) were taken from the International Council for the Exploration of the Sea (ICES) database. Sequential t-test analysis revealed that a regime shift of the oldest sardine age class (age 6+) took place in 1991 and that kittiwakes experienced a regime shift in the number of breeding pairs in 1993, 2 yr after the prey shift. Multiple autocorrelation functions for the detrended time series of sardines and kittiwakes indicated an autocorrelation with a time lag of 2 yr. Despite much reduced fishing effort, sardine densities have not recovered since the collapse, likely due to changes in large-scale atmospheric circulation in the Northern Hemisphere in the late 1990s. Kittiwakes at Sisargas have not recovered demographically, remaining nearly extinct during the last ca. 20 yr. Although we lack detailed demographic data for the studied kittiwake population, we suggest that massive breeding failure and subsequent dispersal to higher-quality patches might explain the rapid non-linear collapse in breeding population density. We discuss some behavioural social responses that may have occurred during and after the collapse to explain the dynamics of the study colony. |
format |
Article in Journal/Newspaper |
author |
Martínez-Abraín, Alejandro Santidrián Tomillo, Pilar Mouriño, J. Tenan, Simone Oro, Daniel |
spellingShingle |
Martínez-Abraín, Alejandro Santidrián Tomillo, Pilar Mouriño, J. Tenan, Simone Oro, Daniel Delayed predator−prey collapses: The case of black-legged kittiwakes and Iberian sardines |
author_facet |
Martínez-Abraín, Alejandro Santidrián Tomillo, Pilar Mouriño, J. Tenan, Simone Oro, Daniel |
author_sort |
Martínez-Abraín, Alejandro |
title |
Delayed predator−prey collapses: The case of black-legged kittiwakes and Iberian sardines |
title_short |
Delayed predator−prey collapses: The case of black-legged kittiwakes and Iberian sardines |
title_full |
Delayed predator−prey collapses: The case of black-legged kittiwakes and Iberian sardines |
title_fullStr |
Delayed predator−prey collapses: The case of black-legged kittiwakes and Iberian sardines |
title_full_unstemmed |
Delayed predator−prey collapses: The case of black-legged kittiwakes and Iberian sardines |
title_sort |
delayed predator−prey collapses: the case of black-legged kittiwakes and iberian sardines |
publisher |
Inter Research |
publishDate |
2019 |
url |
http://hdl.handle.net/10261/204229 https://doi.org/10.3354/meps13164 |
genre |
Black-legged Kittiwake rissa tridactyla |
genre_facet |
Black-legged Kittiwake rissa tridactyla |
op_relation |
http://doi.org/10.3354/meps13164 Sí Marine Ecology Progress Series 631: 201-207 (2019) 0171-8630 http://hdl.handle.net/10261/204229 doi:10.3354/meps13164 1616-1599 |
op_rights |
none |
op_doi |
https://doi.org/10.3354/meps13164 |
container_title |
Marine Ecology Progress Series |
container_volume |
631 |
container_start_page |
201 |
op_container_end_page |
207 |
_version_ |
1790598602192584704 |