Capture-recapture abundance and survival estimates of three cetacean species in Icelandic coastal waters using trained scientist-volunteers
Knowledge of abundance and survival of humpback whales, white-beaked dolphins and minke whales are essential to manage and conserve these species in Icelandic coastal shelf waters. Our main goal was to test the feasibility of employing inexpensive research methods (data collected by trained-scientis...
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2018
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Online Access: | http://agritrop.cirad.fr/603726/ http://agritrop.cirad.fr/603726/1/1-s2.0-S1385110116303628-main.pdf https://doi.org/10.1016/j.seares.2017.10.001 |
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ftcirad:oai:agritrop.cirad.fr:603726 2023-05-15T15:37:00+02:00 Capture-recapture abundance and survival estimates of three cetacean species in Icelandic coastal waters using trained scientist-volunteers Bertulli, Chiara G. Guery, Loreleï McGinty, Niall Suzuki, Ailie Brannan, Naomi Marques, Tania Rasmussen, Marianne H. Gimenez, Olivier 2018 text http://agritrop.cirad.fr/603726/ http://agritrop.cirad.fr/603726/1/1-s2.0-S1385110116303628-main.pdf https://doi.org/10.1016/j.seares.2017.10.001 eng eng http://agritrop.cirad.fr/603726/ Capture-recapture abundance and survival estimates of three cetacean species in Icelandic coastal waters using trained scientist-volunteers. Bertulli Chiara G., Guery Loreleï, McGinty Niall, Suzuki Ailie, Brannan Naomi, Marques Tania, Rasmussen Marianne H., Gimenez Olivier. 2018. Journal of Sea Research, 131 : 22-31.https://doi.org/10.1016/j.seares.2017.10.001 <https://doi.org/10.1016/j.seares.2017.10.001> http://agritrop.cirad.fr/603726/1/1-s2.0-S1385110116303628-main.pdf Cirad license info:eu-repo/semantics/openAccess https://agritrop.cirad.fr/mention_legale.html Journal of Sea Research article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion 2018 ftcirad https://doi.org/10.1016/j.seares.2017.10.001 2023-02-15T00:12:02Z Knowledge of abundance and survival of humpback whales, white-beaked dolphins and minke whales are essential to manage and conserve these species in Icelandic coastal shelf waters. Our main goal was to test the feasibility of employing inexpensive research methods (data collected by trained-scientist volunteers onboard opportunistic vessels) to assess abundance and apparent survival. No previous studies in Iceland have investigated these two demographic parameters in these three cetacean species using open capture-recapture models accounting for imperfect and possibly heterogeneous detection. A transient effect was accounted for whenever required to estimate the population of resident individuals. Identification photographs were collected by scientist-trained volunteers for 7 years (2006–2013) from onboard commercial whale-watching vessels in the coastal waters of Faxaflói (southwest coast, ~ 4400 km2) and Skjálfandi (northeast coast, ~ 1100 km2), Iceland. We estimated an average abundance of 83 humpback whales (Mn; 95% confidence interval: 54–130) in Skjálfandi; 238 white-beaked dolphins (La; [163–321]) in Faxaflói; and 67 minke whales (Ba; [53–82]) in Faxaflói and 24 (14–31) in Skjálfandi. We also found that apparent survival was constant for all three species (Mn: 0.52 [0.41–0.63], La: 0.79 [0.64–0.88], Ba-Faxaflói: 0.80 [0.67–0.88], Ba-Skjálfandi: 0.96 [0.60–0.99]). Our results showed inter-annual variation in abundance estimates which were small for all species, and the presence of transience for minke whales. A significant increase in abundance during the study period was solely found in minke whale data from Skjálfandi. Humpback whales and white-beaked dolphins showed lower apparent survival rates compared to similar baleen whale and dolphin populations. Our results show data collected by trained-scientist volunteers can produce viable estimates of abundance and survival although bias in the methods we employed exist and need to be addressed. With the continued increase in anthropogenic pressures on our ... Article in Journal/Newspaper baleen whale Iceland minke whale Skjálfandi CIRAD: Agritrop (Centre de coopération internationale en recherche agronomique pour le développement) Faxaflói ENVELOPE(-22.451,-22.451,64.322,64.322) Skjálfandi ENVELOPE(-17.532,-17.532,66.070,66.070) Journal of Sea Research 131 22 31 |
institution |
Open Polar |
collection |
CIRAD: Agritrop (Centre de coopération internationale en recherche agronomique pour le développement) |
op_collection_id |
ftcirad |
language |
English |
description |
Knowledge of abundance and survival of humpback whales, white-beaked dolphins and minke whales are essential to manage and conserve these species in Icelandic coastal shelf waters. Our main goal was to test the feasibility of employing inexpensive research methods (data collected by trained-scientist volunteers onboard opportunistic vessels) to assess abundance and apparent survival. No previous studies in Iceland have investigated these two demographic parameters in these three cetacean species using open capture-recapture models accounting for imperfect and possibly heterogeneous detection. A transient effect was accounted for whenever required to estimate the population of resident individuals. Identification photographs were collected by scientist-trained volunteers for 7 years (2006–2013) from onboard commercial whale-watching vessels in the coastal waters of Faxaflói (southwest coast, ~ 4400 km2) and Skjálfandi (northeast coast, ~ 1100 km2), Iceland. We estimated an average abundance of 83 humpback whales (Mn; 95% confidence interval: 54–130) in Skjálfandi; 238 white-beaked dolphins (La; [163–321]) in Faxaflói; and 67 minke whales (Ba; [53–82]) in Faxaflói and 24 (14–31) in Skjálfandi. We also found that apparent survival was constant for all three species (Mn: 0.52 [0.41–0.63], La: 0.79 [0.64–0.88], Ba-Faxaflói: 0.80 [0.67–0.88], Ba-Skjálfandi: 0.96 [0.60–0.99]). Our results showed inter-annual variation in abundance estimates which were small for all species, and the presence of transience for minke whales. A significant increase in abundance during the study period was solely found in minke whale data from Skjálfandi. Humpback whales and white-beaked dolphins showed lower apparent survival rates compared to similar baleen whale and dolphin populations. Our results show data collected by trained-scientist volunteers can produce viable estimates of abundance and survival although bias in the methods we employed exist and need to be addressed. With the continued increase in anthropogenic pressures on our ... |
format |
Article in Journal/Newspaper |
author |
Bertulli, Chiara G. Guery, Loreleï McGinty, Niall Suzuki, Ailie Brannan, Naomi Marques, Tania Rasmussen, Marianne H. Gimenez, Olivier |
spellingShingle |
Bertulli, Chiara G. Guery, Loreleï McGinty, Niall Suzuki, Ailie Brannan, Naomi Marques, Tania Rasmussen, Marianne H. Gimenez, Olivier Capture-recapture abundance and survival estimates of three cetacean species in Icelandic coastal waters using trained scientist-volunteers |
author_facet |
Bertulli, Chiara G. Guery, Loreleï McGinty, Niall Suzuki, Ailie Brannan, Naomi Marques, Tania Rasmussen, Marianne H. Gimenez, Olivier |
author_sort |
Bertulli, Chiara G. |
title |
Capture-recapture abundance and survival estimates of three cetacean species in Icelandic coastal waters using trained scientist-volunteers |
title_short |
Capture-recapture abundance and survival estimates of three cetacean species in Icelandic coastal waters using trained scientist-volunteers |
title_full |
Capture-recapture abundance and survival estimates of three cetacean species in Icelandic coastal waters using trained scientist-volunteers |
title_fullStr |
Capture-recapture abundance and survival estimates of three cetacean species in Icelandic coastal waters using trained scientist-volunteers |
title_full_unstemmed |
Capture-recapture abundance and survival estimates of three cetacean species in Icelandic coastal waters using trained scientist-volunteers |
title_sort |
capture-recapture abundance and survival estimates of three cetacean species in icelandic coastal waters using trained scientist-volunteers |
publishDate |
2018 |
url |
http://agritrop.cirad.fr/603726/ http://agritrop.cirad.fr/603726/1/1-s2.0-S1385110116303628-main.pdf https://doi.org/10.1016/j.seares.2017.10.001 |
long_lat |
ENVELOPE(-22.451,-22.451,64.322,64.322) ENVELOPE(-17.532,-17.532,66.070,66.070) |
geographic |
Faxaflói Skjálfandi |
geographic_facet |
Faxaflói Skjálfandi |
genre |
baleen whale Iceland minke whale Skjálfandi |
genre_facet |
baleen whale Iceland minke whale Skjálfandi |
op_source |
Journal of Sea Research |
op_relation |
http://agritrop.cirad.fr/603726/ Capture-recapture abundance and survival estimates of three cetacean species in Icelandic coastal waters using trained scientist-volunteers. Bertulli Chiara G., Guery Loreleï, McGinty Niall, Suzuki Ailie, Brannan Naomi, Marques Tania, Rasmussen Marianne H., Gimenez Olivier. 2018. Journal of Sea Research, 131 : 22-31.https://doi.org/10.1016/j.seares.2017.10.001 <https://doi.org/10.1016/j.seares.2017.10.001> http://agritrop.cirad.fr/603726/1/1-s2.0-S1385110116303628-main.pdf |
op_rights |
Cirad license info:eu-repo/semantics/openAccess https://agritrop.cirad.fr/mention_legale.html |
op_doi |
https://doi.org/10.1016/j.seares.2017.10.001 |
container_title |
Journal of Sea Research |
container_volume |
131 |
container_start_page |
22 |
op_container_end_page |
31 |
_version_ |
1766367439783723008 |