Characterizing the suckling behavior by video and 3D-accelerometry in humpback whale calves on a breeding ground
International audience Getting maternal milk through nursing is vital for all newborn mammals. Despite its importance, nursing has been poorly documented in humpback whales ( Megaptera novaeangliae ). Nursing is difficult to observe underwater without disturbing the whales and is usually impossible...
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Online Access: | https://hal.sorbonne-universite.fr/hal-03950899 https://doi.org/10.7717/peerj.12945 |
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ftsorbonneuniv:oai:HAL:hal-03950899v1 2024-09-15T18:11:13+00:00 Characterizing the suckling behavior by video and 3D-accelerometry in humpback whale calves on a breeding ground Ratsimbazafindranahaka, Maevatiana Huetz, Chloé Andrianarimisa, Aristide Reidenberg, Joy Saloma, Anjara Adam, Olivier Charrier, Isabelle Lutheries - Acoustique - Musique (IJLRDA-LAM) Institut Jean Le Rond d'Alembert (DALEMBERT) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) ANR-11-IDEX-0003,IPS,Idex Paris-Saclay(2011) 2022 https://hal.sorbonne-universite.fr/hal-03950899 https://doi.org/10.7717/peerj.12945 en eng HAL CCSD PeerJ info:eu-repo/semantics/altIdentifier/doi/10.7717/peerj.12945 hal-03950899 https://hal.sorbonne-universite.fr/hal-03950899 doi:10.7717/peerj.12945 ISSN: 2167-8359 PeerJ https://hal.sorbonne-universite.fr/hal-03950899 PeerJ, 2022, 10, pp.e12945. ⟨10.7717/peerj.12945⟩ [SDV]Life Sciences [q-bio] info:eu-repo/semantics/article Journal articles 2022 ftsorbonneuniv https://doi.org/10.7717/peerj.12945 2024-07-25T23:47:45Z International audience Getting maternal milk through nursing is vital for all newborn mammals. Despite its importance, nursing has been poorly documented in humpback whales ( Megaptera novaeangliae ). Nursing is difficult to observe underwater without disturbing the whales and is usually impossible to observe from a ship. We attempted to observe nursing from the calf’s perspective by placing CATS cam tags on three humpback whale calves in the Sainte Marie channel, Madagascar, Indian Ocean, during the breeding seasons. CATS cam tags are animal-borne multi-sensor tags equipped with a video camera, a hydrophone, and several auxiliary sensors (including a 3-axis accelerometer, a 3-axis magnetometer, and a depth sensor). The use of multi-sensor tags minimized potential disturbance from human presence. A total of 10.52 h of video recordings were collected with the corresponding auxiliary data. Video recordings were manually analyzed and correlated with the auxiliary data, allowing us to extract different kinematic features including the depth rate, speed, Fluke Stroke Rate (FSR), Overall Body Dynamic Acceleration (ODBA), pitch, roll, and roll rate. We found that suckling events lasted 18.8 ± 8.8 s on average ( N = 34) and were performed mostly during dives. Suckling events represented 1.7% of the total observation time. During suckling, the calves were visually estimated to be at a 30–45° pitch angle relative to the midline of their mother’s body and were always observed rolling either to the right or to the left. In our auxiliary dataset, we confirmed that suckling behavior was primarily characterized by a high average absolute roll and additionally we also found that it was likely characterized by a high average FSR and a low average speed. Kinematic features were used for supervised machine learning in order to subsequently detect suckling behavior automatically. Our study is a proof of method on which future investigations can build upon. It opens new opportunities for further investigation of suckling behavior ... Article in Journal/Newspaper Humpback Whale Megaptera novaeangliae HAL Sorbonne Université PeerJ 10 e12945 |
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HAL Sorbonne Université |
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English |
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[SDV]Life Sciences [q-bio] |
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[SDV]Life Sciences [q-bio] Ratsimbazafindranahaka, Maevatiana Huetz, Chloé Andrianarimisa, Aristide Reidenberg, Joy Saloma, Anjara Adam, Olivier Charrier, Isabelle Characterizing the suckling behavior by video and 3D-accelerometry in humpback whale calves on a breeding ground |
topic_facet |
[SDV]Life Sciences [q-bio] |
description |
International audience Getting maternal milk through nursing is vital for all newborn mammals. Despite its importance, nursing has been poorly documented in humpback whales ( Megaptera novaeangliae ). Nursing is difficult to observe underwater without disturbing the whales and is usually impossible to observe from a ship. We attempted to observe nursing from the calf’s perspective by placing CATS cam tags on three humpback whale calves in the Sainte Marie channel, Madagascar, Indian Ocean, during the breeding seasons. CATS cam tags are animal-borne multi-sensor tags equipped with a video camera, a hydrophone, and several auxiliary sensors (including a 3-axis accelerometer, a 3-axis magnetometer, and a depth sensor). The use of multi-sensor tags minimized potential disturbance from human presence. A total of 10.52 h of video recordings were collected with the corresponding auxiliary data. Video recordings were manually analyzed and correlated with the auxiliary data, allowing us to extract different kinematic features including the depth rate, speed, Fluke Stroke Rate (FSR), Overall Body Dynamic Acceleration (ODBA), pitch, roll, and roll rate. We found that suckling events lasted 18.8 ± 8.8 s on average ( N = 34) and were performed mostly during dives. Suckling events represented 1.7% of the total observation time. During suckling, the calves were visually estimated to be at a 30–45° pitch angle relative to the midline of their mother’s body and were always observed rolling either to the right or to the left. In our auxiliary dataset, we confirmed that suckling behavior was primarily characterized by a high average absolute roll and additionally we also found that it was likely characterized by a high average FSR and a low average speed. Kinematic features were used for supervised machine learning in order to subsequently detect suckling behavior automatically. Our study is a proof of method on which future investigations can build upon. It opens new opportunities for further investigation of suckling behavior ... |
author2 |
Lutheries - Acoustique - Musique (IJLRDA-LAM) Institut Jean Le Rond d'Alembert (DALEMBERT) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) ANR-11-IDEX-0003,IPS,Idex Paris-Saclay(2011) |
format |
Article in Journal/Newspaper |
author |
Ratsimbazafindranahaka, Maevatiana Huetz, Chloé Andrianarimisa, Aristide Reidenberg, Joy Saloma, Anjara Adam, Olivier Charrier, Isabelle |
author_facet |
Ratsimbazafindranahaka, Maevatiana Huetz, Chloé Andrianarimisa, Aristide Reidenberg, Joy Saloma, Anjara Adam, Olivier Charrier, Isabelle |
author_sort |
Ratsimbazafindranahaka, Maevatiana |
title |
Characterizing the suckling behavior by video and 3D-accelerometry in humpback whale calves on a breeding ground |
title_short |
Characterizing the suckling behavior by video and 3D-accelerometry in humpback whale calves on a breeding ground |
title_full |
Characterizing the suckling behavior by video and 3D-accelerometry in humpback whale calves on a breeding ground |
title_fullStr |
Characterizing the suckling behavior by video and 3D-accelerometry in humpback whale calves on a breeding ground |
title_full_unstemmed |
Characterizing the suckling behavior by video and 3D-accelerometry in humpback whale calves on a breeding ground |
title_sort |
characterizing the suckling behavior by video and 3d-accelerometry in humpback whale calves on a breeding ground |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://hal.sorbonne-universite.fr/hal-03950899 https://doi.org/10.7717/peerj.12945 |
genre |
Humpback Whale Megaptera novaeangliae |
genre_facet |
Humpback Whale Megaptera novaeangliae |
op_source |
ISSN: 2167-8359 PeerJ https://hal.sorbonne-universite.fr/hal-03950899 PeerJ, 2022, 10, pp.e12945. ⟨10.7717/peerj.12945⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.7717/peerj.12945 hal-03950899 https://hal.sorbonne-universite.fr/hal-03950899 doi:10.7717/peerj.12945 |
op_doi |
https://doi.org/10.7717/peerj.12945 |
container_title |
PeerJ |
container_volume |
10 |
container_start_page |
e12945 |
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1810448804844929024 |