An integrated assessment model of seabird population dynamics: can individual heterogeneity in susceptibility to fishing explain abundance trends in Crozet wandering albatross?
International audience 1. Seabirds have been incidentally caught in distant-water longline fleets operating in theSouthern Ocean since at least the 1970s, and breeding numbers for some populations haveshown marked trends of decline and recovery concomitant with longline fishing effort withintheir di...
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Online Access: | https://hal.science/hal-01304872 https://doi.org/10.1111/1365-2664.12462 |
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ftunivrochelle:oai:HAL:hal-01304872v1 2024-02-11T10:09:22+01:00 An integrated assessment model of seabird population dynamics: can individual heterogeneity in susceptibility to fishing explain abundance trends in Crozet wandering albatross? Tuck, Geoffrey N. Thomson, Robin B. Barbraud, Christophe Delord, Karine Louzao, Maite Herrera, Miguel Weimerskirch, Henri Oceans and Atmosphere Flagship (CSIRO) CSIRO Oceans and Atmosphere Flagship Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) Institut National de la Recherche Agronomique (INRA)-La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) Indian Ocean Tuna Commission (IOTC) 2015 https://hal.science/hal-01304872 https://doi.org/10.1111/1365-2664.12462 en eng HAL CCSD Wiley info:eu-repo/semantics/altIdentifier/doi/10.1111/1365-2664.12462 hal-01304872 https://hal.science/hal-01304872 doi:10.1111/1365-2664.12462 ISSN: 0021-8901 EISSN: 1365-2664 Journal of Applied Ecology https://hal.science/hal-01304872 Journal of Applied Ecology, 2015, 52, pp.950-959. ⟨10.1111/1365-2664.12462⟩ albatross bycatch conservation management Crozet Island evolution heterogeneity longline fishing personality population model spatial management [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2015 ftunivrochelle https://doi.org/10.1111/1365-2664.12462 2024-01-23T23:35:46Z International audience 1. Seabirds have been incidentally caught in distant-water longline fleets operating in theSouthern Ocean since at least the 1970s, and breeding numbers for some populations haveshown marked trends of decline and recovery concomitant with longline fishing effort withintheir distributions. However, lacking is an understanding of how forms of among-individualheterogeneity may interact with fisheries bycatch and influence population dynamics.2. We develop a model that uses comprehensive data on the spatial and temporal distributionsof fishing effort and seabird foraging to estimate temporal overlaps, fishery catchabilityand consequent bycatch. We apply a population model that is structured by age, sex, lifestage and spatially to Crozet Island wandering albatross and explore how heterogeneity insusceptibility to capture may have influenced the population’s demography over time.3. A model where some birds were assumed to be more susceptible to fisheries bycatch wasable to successfully replicate the observed trend in breeding pairs. Considerably poorer fitswere found without this assumption. Results suggested that the more susceptible birds mayhave been removed from the population by the 1990s.4. The model was also able to highlight areas, times and fleets prone to increased bycatch.Knowledge of these factors should assist fisheries and conservation management bodies toquantify and reduce seabird bycatch through spatial management and fleet-specific mitigationefforts.5. Synthesis and application. Many seabirds show complex life histories that make themhighly susceptible to additional incidental mortality from fishing vessels. By applying apopulation model that integrates key aspects of seabird and fishery dynamics, we were able toexplain the observed trends in the breeding population of Crozet wandering albatross andidentify key areas and fleets where further mitigation may be required. In addition, the potentialremoval of a category of birds that shows increased susceptibility to capture has ... Article in Journal/Newspaper Wandering Albatross HAL - Université de La Rochelle Journal of Applied Ecology 52 4 950 959 |
institution |
Open Polar |
collection |
HAL - Université de La Rochelle |
op_collection_id |
ftunivrochelle |
language |
English |
topic |
albatross bycatch conservation management Crozet Island evolution heterogeneity longline fishing personality population model spatial management [SDE]Environmental Sciences |
spellingShingle |
albatross bycatch conservation management Crozet Island evolution heterogeneity longline fishing personality population model spatial management [SDE]Environmental Sciences Tuck, Geoffrey N. Thomson, Robin B. Barbraud, Christophe Delord, Karine Louzao, Maite Herrera, Miguel Weimerskirch, Henri An integrated assessment model of seabird population dynamics: can individual heterogeneity in susceptibility to fishing explain abundance trends in Crozet wandering albatross? |
topic_facet |
albatross bycatch conservation management Crozet Island evolution heterogeneity longline fishing personality population model spatial management [SDE]Environmental Sciences |
description |
International audience 1. Seabirds have been incidentally caught in distant-water longline fleets operating in theSouthern Ocean since at least the 1970s, and breeding numbers for some populations haveshown marked trends of decline and recovery concomitant with longline fishing effort withintheir distributions. However, lacking is an understanding of how forms of among-individualheterogeneity may interact with fisheries bycatch and influence population dynamics.2. We develop a model that uses comprehensive data on the spatial and temporal distributionsof fishing effort and seabird foraging to estimate temporal overlaps, fishery catchabilityand consequent bycatch. We apply a population model that is structured by age, sex, lifestage and spatially to Crozet Island wandering albatross and explore how heterogeneity insusceptibility to capture may have influenced the population’s demography over time.3. A model where some birds were assumed to be more susceptible to fisheries bycatch wasable to successfully replicate the observed trend in breeding pairs. Considerably poorer fitswere found without this assumption. Results suggested that the more susceptible birds mayhave been removed from the population by the 1990s.4. The model was also able to highlight areas, times and fleets prone to increased bycatch.Knowledge of these factors should assist fisheries and conservation management bodies toquantify and reduce seabird bycatch through spatial management and fleet-specific mitigationefforts.5. Synthesis and application. Many seabirds show complex life histories that make themhighly susceptible to additional incidental mortality from fishing vessels. By applying apopulation model that integrates key aspects of seabird and fishery dynamics, we were able toexplain the observed trends in the breeding population of Crozet wandering albatross andidentify key areas and fleets where further mitigation may be required. In addition, the potentialremoval of a category of birds that shows increased susceptibility to capture has ... |
author2 |
Oceans and Atmosphere Flagship (CSIRO) CSIRO Oceans and Atmosphere Flagship Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) Institut National de la Recherche Agronomique (INRA)-La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) Indian Ocean Tuna Commission (IOTC) |
format |
Article in Journal/Newspaper |
author |
Tuck, Geoffrey N. Thomson, Robin B. Barbraud, Christophe Delord, Karine Louzao, Maite Herrera, Miguel Weimerskirch, Henri |
author_facet |
Tuck, Geoffrey N. Thomson, Robin B. Barbraud, Christophe Delord, Karine Louzao, Maite Herrera, Miguel Weimerskirch, Henri |
author_sort |
Tuck, Geoffrey N. |
title |
An integrated assessment model of seabird population dynamics: can individual heterogeneity in susceptibility to fishing explain abundance trends in Crozet wandering albatross? |
title_short |
An integrated assessment model of seabird population dynamics: can individual heterogeneity in susceptibility to fishing explain abundance trends in Crozet wandering albatross? |
title_full |
An integrated assessment model of seabird population dynamics: can individual heterogeneity in susceptibility to fishing explain abundance trends in Crozet wandering albatross? |
title_fullStr |
An integrated assessment model of seabird population dynamics: can individual heterogeneity in susceptibility to fishing explain abundance trends in Crozet wandering albatross? |
title_full_unstemmed |
An integrated assessment model of seabird population dynamics: can individual heterogeneity in susceptibility to fishing explain abundance trends in Crozet wandering albatross? |
title_sort |
integrated assessment model of seabird population dynamics: can individual heterogeneity in susceptibility to fishing explain abundance trends in crozet wandering albatross? |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://hal.science/hal-01304872 https://doi.org/10.1111/1365-2664.12462 |
genre |
Wandering Albatross |
genre_facet |
Wandering Albatross |
op_source |
ISSN: 0021-8901 EISSN: 1365-2664 Journal of Applied Ecology https://hal.science/hal-01304872 Journal of Applied Ecology, 2015, 52, pp.950-959. ⟨10.1111/1365-2664.12462⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1111/1365-2664.12462 hal-01304872 https://hal.science/hal-01304872 doi:10.1111/1365-2664.12462 |
op_doi |
https://doi.org/10.1111/1365-2664.12462 |
container_title |
Journal of Applied Ecology |
container_volume |
52 |
container_issue |
4 |
container_start_page |
950 |
op_container_end_page |
959 |
_version_ |
1790609241650757632 |