Robust assessment of population trends in marine mammals applied to New Caledonian humpback whales
International audience \textcopyright Inter-Research 2014.Estimating population trends for long-lived, migratory animals is challenging but essential for managing populations. Here we propose using a simple but potentially robust method, the direct estimation of population growth rate (PGR) from cap...
Published in: | Marine Ecology Progress Series |
---|---|
Main Authors: | , , , |
Other Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2014
|
Subjects: | |
Online Access: | https://hal.science/hal-01911585 https://doi.org/10.3354/meps10992 |
id |
ftinstagro:oai:HAL:hal-01911585v1 |
---|---|
record_format |
openpolar |
spelling |
ftinstagro:oai:HAL:hal-01911585v1 2024-05-19T07:41:46+00:00 Robust assessment of population trends in marine mammals applied to New Caledonian humpback whales Orgeret, F. Garrigue, C. Gimenez, Olivier Pradel, Roger Centre d’Ecologie Fonctionnelle et Evolutive (CEFE) Université Paul-Valéry - Montpellier 3 (UPVM)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-École Pratique des Hautes Études (EPHE) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Sud )-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro) 2014 https://hal.science/hal-01911585 https://doi.org/10.3354/meps10992 en eng HAL CCSD Inter Research info:eu-repo/semantics/altIdentifier/doi/10.3354/meps10992 hal-01911585 https://hal.science/hal-01911585 doi:10.3354/meps10992 ISSN: 0171-8630 EISSN: 1616-1599 Marine Ecology Progress Series https://hal.science/hal-01911585 Marine Ecology Progress Series, 2014, 515, pp.265--273. ⟨10.3354/meps10992⟩ CNRS1 Megaptera novaeangliae Multi- [Capture-recapture [SDE.BE]Environmental Sciences/Biodiversity and Ecology info:eu-repo/semantics/article Journal articles 2014 ftinstagro https://doi.org/10.3354/meps10992 2024-04-25T17:21:12Z International audience \textcopyright Inter-Research 2014.Estimating population trends for long-lived, migratory animals is challenging but essential for managing populations. Here we propose using a simple but potentially robust method, the direct estimation of population growth rate (PGR) from capture-recapture data. We considered an Endangered population of humpback whales Megaptera novaeangliae breeding and calving annually in the southern lagoon of New Caledonia. Studied since 1996, this population is known to exhibit a strong signal of transience, i.e. the presence of individuals that pass through the sampling area once, inducing detection heterogeneity. Another difficulty is that a more recently discovered second breeding and calving habitat (offshore seamounts to the south) has been surveyed with less intensity. Current direct PGR estimation models cannot deal with spatial sampling heterogeneity. In order to assess the reliability of the proposed method - in general and for our population in particular - we evaluated its robustness using simulations: first, when there are transient individuals; then, when the study area is split into 2 unequally sampled parts. We found no bias in PGR in the presence of transients. The bias with 2 unequally sampled parts depends on the amount and direction of exchanges, but appears negligible in our case study. The constant yearly PGR of the New Caledonian humpback whale population at the level of the 2 habitats was estimated at 1.15 (95% CI 1.11-1.20), suggesting outside recruitment. Whenever capture-recapture is feasible, we recommend the Pradel approach to estimate the PGR, validated with appropriate simulations, in order to assess population welfare. Article in Journal/Newspaper Humpback Whale Megaptera novaeangliae Portail HAL Institut Agro Marine Ecology Progress Series 515 265 273 |
institution |
Open Polar |
collection |
Portail HAL Institut Agro |
op_collection_id |
ftinstagro |
language |
English |
topic |
CNRS1 Megaptera novaeangliae Multi- [Capture-recapture [SDE.BE]Environmental Sciences/Biodiversity and Ecology |
spellingShingle |
CNRS1 Megaptera novaeangliae Multi- [Capture-recapture [SDE.BE]Environmental Sciences/Biodiversity and Ecology Orgeret, F. Garrigue, C. Gimenez, Olivier Pradel, Roger Robust assessment of population trends in marine mammals applied to New Caledonian humpback whales |
topic_facet |
CNRS1 Megaptera novaeangliae Multi- [Capture-recapture [SDE.BE]Environmental Sciences/Biodiversity and Ecology |
description |
International audience \textcopyright Inter-Research 2014.Estimating population trends for long-lived, migratory animals is challenging but essential for managing populations. Here we propose using a simple but potentially robust method, the direct estimation of population growth rate (PGR) from capture-recapture data. We considered an Endangered population of humpback whales Megaptera novaeangliae breeding and calving annually in the southern lagoon of New Caledonia. Studied since 1996, this population is known to exhibit a strong signal of transience, i.e. the presence of individuals that pass through the sampling area once, inducing detection heterogeneity. Another difficulty is that a more recently discovered second breeding and calving habitat (offshore seamounts to the south) has been surveyed with less intensity. Current direct PGR estimation models cannot deal with spatial sampling heterogeneity. In order to assess the reliability of the proposed method - in general and for our population in particular - we evaluated its robustness using simulations: first, when there are transient individuals; then, when the study area is split into 2 unequally sampled parts. We found no bias in PGR in the presence of transients. The bias with 2 unequally sampled parts depends on the amount and direction of exchanges, but appears negligible in our case study. The constant yearly PGR of the New Caledonian humpback whale population at the level of the 2 habitats was estimated at 1.15 (95% CI 1.11-1.20), suggesting outside recruitment. Whenever capture-recapture is feasible, we recommend the Pradel approach to estimate the PGR, validated with appropriate simulations, in order to assess population welfare. |
author2 |
Centre d’Ecologie Fonctionnelle et Evolutive (CEFE) Université Paul-Valéry - Montpellier 3 (UPVM)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-École Pratique des Hautes Études (EPHE) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Sud )-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro) |
format |
Article in Journal/Newspaper |
author |
Orgeret, F. Garrigue, C. Gimenez, Olivier Pradel, Roger |
author_facet |
Orgeret, F. Garrigue, C. Gimenez, Olivier Pradel, Roger |
author_sort |
Orgeret, F. |
title |
Robust assessment of population trends in marine mammals applied to New Caledonian humpback whales |
title_short |
Robust assessment of population trends in marine mammals applied to New Caledonian humpback whales |
title_full |
Robust assessment of population trends in marine mammals applied to New Caledonian humpback whales |
title_fullStr |
Robust assessment of population trends in marine mammals applied to New Caledonian humpback whales |
title_full_unstemmed |
Robust assessment of population trends in marine mammals applied to New Caledonian humpback whales |
title_sort |
robust assessment of population trends in marine mammals applied to new caledonian humpback whales |
publisher |
HAL CCSD |
publishDate |
2014 |
url |
https://hal.science/hal-01911585 https://doi.org/10.3354/meps10992 |
genre |
Humpback Whale Megaptera novaeangliae |
genre_facet |
Humpback Whale Megaptera novaeangliae |
op_source |
ISSN: 0171-8630 EISSN: 1616-1599 Marine Ecology Progress Series https://hal.science/hal-01911585 Marine Ecology Progress Series, 2014, 515, pp.265--273. ⟨10.3354/meps10992⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3354/meps10992 hal-01911585 https://hal.science/hal-01911585 doi:10.3354/meps10992 |
op_doi |
https://doi.org/10.3354/meps10992 |
container_title |
Marine Ecology Progress Series |
container_volume |
515 |
container_start_page |
265 |
op_container_end_page |
273 |
_version_ |
1799481374863785984 |