Cargando…
Investigating Rates of Hunting and Survival in Declining European Lapwing Populations
Understanding effects of harvest on population dynamics is of major interest, especially for declining species. European lapwing Vanellus vanellus populations increased from the 1960s until the 1980s and declined strongly thereafter. About 400,000 lapwings are harvested annually and it is thus of hi...
Autores principales: | , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2016
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5042549/ https://www.ncbi.nlm.nih.gov/pubmed/27685660 http://dx.doi.org/10.1371/journal.pone.0163850 |
_version_ | 1782456613621202944 |
---|---|
author | Souchay, Guillaume Schaub, Michael |
author_facet | Souchay, Guillaume Schaub, Michael |
author_sort | Souchay, Guillaume |
collection | PubMed |
description | Understanding effects of harvest on population dynamics is of major interest, especially for declining species. European lapwing Vanellus vanellus populations increased from the 1960s until the 1980s and declined strongly thereafter. About 400,000 lapwings are harvested annually and it is thus of high conservation relevance to assess whether hunting was a main cause for the observed changes in lapwing population trends. We developed a multi-event cause-specific mortality model which we applied to a long-term ring-recovery data set (1960–2010) of > 360,000 records to estimate survival and cause-specific mortalities. We found no temporal change in survival over the last 50 years for first-year (FY) and older birds (after first-year; AFY) originating from different ringing areas. Mean survival was high, around 0.60 and 0.80 for FY and AFY individuals, respectively. The proportion of total mortality due to hunting was <0.10 over the study period and the estimated proportion of harvested individuals (kill rate) was <0.05 in each year. Our result of constant survival indicates that demographic processes other than survival were responsible for the pronounced change in lapwing population trends in the 1980s. Our findings lend support to the hypothesis that hunting was not a significant contributor to the large-scale decline of lapwing populations. To halt the ongoing decline of European lapwing populations management should focus on life history stages other than survival (e.g. productivity). Further analyses are required to investigate the contribution of other demographic rates to the decline of lapwings and to identify the most efficient conservation actions. |
format | Online Article Text |
id | pubmed-5042549 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-50425492016-10-27 Investigating Rates of Hunting and Survival in Declining European Lapwing Populations Souchay, Guillaume Schaub, Michael PLoS One Research Article Understanding effects of harvest on population dynamics is of major interest, especially for declining species. European lapwing Vanellus vanellus populations increased from the 1960s until the 1980s and declined strongly thereafter. About 400,000 lapwings are harvested annually and it is thus of high conservation relevance to assess whether hunting was a main cause for the observed changes in lapwing population trends. We developed a multi-event cause-specific mortality model which we applied to a long-term ring-recovery data set (1960–2010) of > 360,000 records to estimate survival and cause-specific mortalities. We found no temporal change in survival over the last 50 years for first-year (FY) and older birds (after first-year; AFY) originating from different ringing areas. Mean survival was high, around 0.60 and 0.80 for FY and AFY individuals, respectively. The proportion of total mortality due to hunting was <0.10 over the study period and the estimated proportion of harvested individuals (kill rate) was <0.05 in each year. Our result of constant survival indicates that demographic processes other than survival were responsible for the pronounced change in lapwing population trends in the 1980s. Our findings lend support to the hypothesis that hunting was not a significant contributor to the large-scale decline of lapwing populations. To halt the ongoing decline of European lapwing populations management should focus on life history stages other than survival (e.g. productivity). Further analyses are required to investigate the contribution of other demographic rates to the decline of lapwings and to identify the most efficient conservation actions. Public Library of Science 2016-09-29 /pmc/articles/PMC5042549/ /pubmed/27685660 http://dx.doi.org/10.1371/journal.pone.0163850 Text en © 2016 Souchay, Schaub http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
spellingShingle | Research Article Souchay, Guillaume Schaub, Michael Investigating Rates of Hunting and Survival in Declining European Lapwing Populations |
title | Investigating Rates of Hunting and Survival in Declining European Lapwing Populations |
title_full | Investigating Rates of Hunting and Survival in Declining European Lapwing Populations |
title_fullStr | Investigating Rates of Hunting and Survival in Declining European Lapwing Populations |
title_full_unstemmed | Investigating Rates of Hunting and Survival in Declining European Lapwing Populations |
title_short | Investigating Rates of Hunting and Survival in Declining European Lapwing Populations |
title_sort | investigating rates of hunting and survival in declining european lapwing populations |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5042549/ https://www.ncbi.nlm.nih.gov/pubmed/27685660 http://dx.doi.org/10.1371/journal.pone.0163850 |
work_keys_str_mv | AT souchayguillaume investigatingratesofhuntingandsurvivalindecliningeuropeanlapwingpopulations AT schaubmichael investigatingratesofhuntingandsurvivalindecliningeuropeanlapwingpopulations |