The incidence of bent dorsal fins in free-ranging cetaceans
| Autor: | Anita Alessandrini, Marie-Thérèse Mrusczok, Rita Ferreira, Giovanni Bearzi, Eve Jourdain, Filipe Alves, A. Gullan, Robin W. Baird, Jared R. Towers, Filipa I. P. Samarra, C. Yzoard, Ana Dinis, Silvia Bonizzoni, K. Hupman, Chiara G. Bertulli, C. R. Weir, Sara Magalhães, A. H. Kopelman, Z. Halicka, D. Rocha, Marianne H. Rasmussen, John K. B. Ford |
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| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
Pseudorca crassidens Histology Fin Zoology Cetacea Captivity Brief Communication 010603 evolutionary biology 01 natural sciences biology.animal Animals Molecular Biology Ecology Evolution Behavior and Systematics biology Ecology Whale 010604 marine biology & hydrobiology Incidence Species diversity Cell Biology biology.organism_classification Dorsal fin Animal Fins Anatomy Abnormality Developmental Biology |
| Zdroj: | Journal of anatomy. 232(2) |
| ISSN: | 1469-7580 |
| Popis: | Laterally bent dorsal fins are rarely observed in free-ranging populations of cetaceans, contrary to captivity, where most killer whale Orcinus orca adult males have laterally collapsed fins. This topic has been poorly explored, and data/information on its occurrence and possible causes are limited. The present study: (i) undertakes a review of the available information on bent dorsal fins in free-ranging cetaceans, and updates it with new records, (ii) reports on the proportion of bent fins in different study populations, and (iii) discusses possible causes. An empirical approach based on bibliographic research and compilation of 52 new records collected worldwide resulted in a total of 17 species of cetaceans displaying bent dorsal fins. The species with the highest number of records (64%) and from most locations was O. orca. On average, individuals with bent dorsal fins represent |
| Databáze: | OpenAIRE |
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