Determination of growth, mass, and body mass index of harbour porpoises (Phocoena phocoena): Implications for conservational status assessment of populations
Longitudinal data on individual growth and seasonal changes in body mass, girth, and blubber thickness are rarely available for cetaceans, making it difficult to assess their population composition and individual nutritional condition. During different time intervals from 1997–2020, we collected lon...
Published in: | Global Ecology and Conservation |
---|---|
Main Authors: | , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2023
|
Subjects: | |
Online Access: | https://pure.au.dk/portal/da/publications/determination-of-growth-mass-and-body-mass-index-of-harbour-porpoises-phocoena-phocoena-implications-for-conservational-status-assessment-of-populations(2b5792a2-ff18-4378-a635-8d79eaa33b6f).html https://doi.org/10.1016/j.gecco.2023.e02384 |
id |
ftuniaarhuspubl:oai:pure.atira.dk:publications/2b5792a2-ff18-4378-a635-8d79eaa33b6f |
---|---|
record_format |
openpolar |
spelling |
ftuniaarhuspubl:oai:pure.atira.dk:publications/2b5792a2-ff18-4378-a635-8d79eaa33b6f 2023-12-31T10:22:01+01:00 Determination of growth, mass, and body mass index of harbour porpoises (Phocoena phocoena): Implications for conservational status assessment of populations Stepien, Emilie Nicoline Nabe-Nielsen, Jacob Hansen, Kirstin Anderson Højer Kristensen, Jakob Blanchet, Marie-Anne Brando, Sabrina Desportes, Genevieve Lockyer, Christina Marcenaro , Lauro Bunskoek, Paulien Kemper, José Siebert, Ursula Tange Olsen, Morten Wahlberg, Magnus 2023-04 https://pure.au.dk/portal/da/publications/determination-of-growth-mass-and-body-mass-index-of-harbour-porpoises-phocoena-phocoena-implications-for-conservational-status-assessment-of-populations(2b5792a2-ff18-4378-a635-8d79eaa33b6f).html https://doi.org/10.1016/j.gecco.2023.e02384 eng eng https://pure.au.dk/portal/da/publications/determination-of-growth-mass-and-body-mass-index-of-harbour-porpoises-phocoena-phocoena-implications-for-conservational-status-assessment-of-populations(2b5792a2-ff18-4378-a635-8d79eaa33b6f).html info:eu-repo/semantics/openAccess Stepien , E N , Nabe-Nielsen , J , Hansen , K A , Højer Kristensen , J , Blanchet , M-A , Brando , S , Desportes , G , Lockyer , C , Marcenaro , L , Bunskoek , P , Kemper , J , Siebert , U , Tange Olsen , M & Wahlberg , M 2023 , ' Determination of growth, mass, and body mass index of harbour porpoises (Phocoena phocoena): Implications for conservational status assessment of populations ' , Global Ecology and Conservation , vol. 42 , e02384 . https://doi.org/10.1016/j.gecco.2023.e02384 BMI Body morphometric Life history Odontocetes Seasonal trends Von Bertalanffy article 2023 ftuniaarhuspubl https://doi.org/10.1016/j.gecco.2023.e02384 2023-12-07T00:05:55Z Longitudinal data on individual growth and seasonal changes in body mass, girth, and blubber thickness are rarely available for cetaceans, making it difficult to assess their population composition and individual nutritional condition. During different time intervals from 1997–2020, we collected longitudinal data on length, body mass, girth,and blubber thickness from seventeen harbour porpoises (Phocoena phocoena) in human care. We compared Gompertz and von Bertalanffy growth curves to collected length data at age 0–4 years for five individuals with known dates of birth. Von Bertalanffy had the lowest AICc value and was used to predict the birth year of twelve animals which age had previously been estimated based on tooth ring analysis and ossification of flipper bones. The growth curve was accurate within 1 yr. of age estimates. Within the first year, the calves grew 66%, attaining 84% of their adult length, and reached asymptotic length at age 3–4. For adults, there were large seasonal variations in body mass, body mass index, girth, and blubber thickness, with up to 28% of variation in body mass between seasons. We predicted individual body mass within ±2 kg using measurements of length and girth, allowing estimation of body mass index of individuals with unknown mass. Our findings enable monitoring and assessments of population composition as well as nutritional condition of individual harbour porpoises, which is crucial for assessing conservational status and guiding management. Article in Journal/Newspaper Phocoena phocoena Aarhus University: Research Global Ecology and Conservation 42 e02384 |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
topic |
BMI Body morphometric Life history Odontocetes Seasonal trends Von Bertalanffy |
spellingShingle |
BMI Body morphometric Life history Odontocetes Seasonal trends Von Bertalanffy Stepien, Emilie Nicoline Nabe-Nielsen, Jacob Hansen, Kirstin Anderson Højer Kristensen, Jakob Blanchet, Marie-Anne Brando, Sabrina Desportes, Genevieve Lockyer, Christina Marcenaro , Lauro Bunskoek, Paulien Kemper, José Siebert, Ursula Tange Olsen, Morten Wahlberg, Magnus Determination of growth, mass, and body mass index of harbour porpoises (Phocoena phocoena): Implications for conservational status assessment of populations |
topic_facet |
BMI Body morphometric Life history Odontocetes Seasonal trends Von Bertalanffy |
description |
Longitudinal data on individual growth and seasonal changes in body mass, girth, and blubber thickness are rarely available for cetaceans, making it difficult to assess their population composition and individual nutritional condition. During different time intervals from 1997–2020, we collected longitudinal data on length, body mass, girth,and blubber thickness from seventeen harbour porpoises (Phocoena phocoena) in human care. We compared Gompertz and von Bertalanffy growth curves to collected length data at age 0–4 years for five individuals with known dates of birth. Von Bertalanffy had the lowest AICc value and was used to predict the birth year of twelve animals which age had previously been estimated based on tooth ring analysis and ossification of flipper bones. The growth curve was accurate within 1 yr. of age estimates. Within the first year, the calves grew 66%, attaining 84% of their adult length, and reached asymptotic length at age 3–4. For adults, there were large seasonal variations in body mass, body mass index, girth, and blubber thickness, with up to 28% of variation in body mass between seasons. We predicted individual body mass within ±2 kg using measurements of length and girth, allowing estimation of body mass index of individuals with unknown mass. Our findings enable monitoring and assessments of population composition as well as nutritional condition of individual harbour porpoises, which is crucial for assessing conservational status and guiding management. |
format |
Article in Journal/Newspaper |
author |
Stepien, Emilie Nicoline Nabe-Nielsen, Jacob Hansen, Kirstin Anderson Højer Kristensen, Jakob Blanchet, Marie-Anne Brando, Sabrina Desportes, Genevieve Lockyer, Christina Marcenaro , Lauro Bunskoek, Paulien Kemper, José Siebert, Ursula Tange Olsen, Morten Wahlberg, Magnus |
author_facet |
Stepien, Emilie Nicoline Nabe-Nielsen, Jacob Hansen, Kirstin Anderson Højer Kristensen, Jakob Blanchet, Marie-Anne Brando, Sabrina Desportes, Genevieve Lockyer, Christina Marcenaro , Lauro Bunskoek, Paulien Kemper, José Siebert, Ursula Tange Olsen, Morten Wahlberg, Magnus |
author_sort |
Stepien, Emilie Nicoline |
title |
Determination of growth, mass, and body mass index of harbour porpoises (Phocoena phocoena): Implications for conservational status assessment of populations |
title_short |
Determination of growth, mass, and body mass index of harbour porpoises (Phocoena phocoena): Implications for conservational status assessment of populations |
title_full |
Determination of growth, mass, and body mass index of harbour porpoises (Phocoena phocoena): Implications for conservational status assessment of populations |
title_fullStr |
Determination of growth, mass, and body mass index of harbour porpoises (Phocoena phocoena): Implications for conservational status assessment of populations |
title_full_unstemmed |
Determination of growth, mass, and body mass index of harbour porpoises (Phocoena phocoena): Implications for conservational status assessment of populations |
title_sort |
determination of growth, mass, and body mass index of harbour porpoises (phocoena phocoena): implications for conservational status assessment of populations |
publishDate |
2023 |
url |
https://pure.au.dk/portal/da/publications/determination-of-growth-mass-and-body-mass-index-of-harbour-porpoises-phocoena-phocoena-implications-for-conservational-status-assessment-of-populations(2b5792a2-ff18-4378-a635-8d79eaa33b6f).html https://doi.org/10.1016/j.gecco.2023.e02384 |
genre |
Phocoena phocoena |
genre_facet |
Phocoena phocoena |
op_source |
Stepien , E N , Nabe-Nielsen , J , Hansen , K A , Højer Kristensen , J , Blanchet , M-A , Brando , S , Desportes , G , Lockyer , C , Marcenaro , L , Bunskoek , P , Kemper , J , Siebert , U , Tange Olsen , M & Wahlberg , M 2023 , ' Determination of growth, mass, and body mass index of harbour porpoises (Phocoena phocoena): Implications for conservational status assessment of populations ' , Global Ecology and Conservation , vol. 42 , e02384 . https://doi.org/10.1016/j.gecco.2023.e02384 |
op_relation |
https://pure.au.dk/portal/da/publications/determination-of-growth-mass-and-body-mass-index-of-harbour-porpoises-phocoena-phocoena-implications-for-conservational-status-assessment-of-populations(2b5792a2-ff18-4378-a635-8d79eaa33b6f).html |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.gecco.2023.e02384 |
container_title |
Global Ecology and Conservation |
container_volume |
42 |
container_start_page |
e02384 |
_version_ |
1786832996360257536 |