Analysis of body mass changes in the Black-Headed Gull (Larus ridibundus) during the winter

During the autumn migration of many waterfowls, body mass is lowest upon arrival at the wintering area and gradually increases during the winter. Consequently, body mass is highest before the spring migration. We studied the pattern of body mass changes in the Black-Headed Gull (Larus ridibundus) fr...

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Detalles Bibliográficos
Autores principales: USHINE, Nana, SATO, Tatsuo, KATO, Takuya, HAYAMA, Shin-ichi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Japanese Society of Veterinary Science 2017
Materias:
Wildlife Science
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5627339/
https://www.ncbi.nlm.nih.gov/pubmed/28757507
http://dx.doi.org/10.1292/jvms.17-0099
Descripción
Sumario:During the autumn migration of many waterfowls, body mass is lowest upon arrival at the wintering area and gradually increases during the winter. Consequently, body mass is highest before the spring migration. We studied the pattern of body mass changes in the Black-Headed Gull (Larus ridibundus) from December 2010 to December 2016 in the Shinhama area of Chiba, Japan. Based on 327 captured animals, body mass increased during the wintering period, but tended to decrease before migration. In 2014–2016, a muscle mass reduction in females was observed, explaining the change in body mass. However, the observed weight loss may be caused by many factors, which may be related to the migratory ecology of the regional population.

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