期刊
MARINE MAMMAL SCIENCE
卷 27, 期 4, 页码 819-827出版社
WILEY-BLACKWELL
DOI: 10.1111/j.1748-7692.2010.00445.x
关键词
bowhead whale; Balaena mysticetus; pan-tropical spotted dolphin; Stenella attenuata; prenatal growth
资金
- Alaska Eskimo Whaling Commission
- whaling captains' associations
- Barrow
- Saint Lawrence Island
- Kaktovik
- North Slope Borough
- North Slope Borough Department of Wildlife Management
- National Science Foundation
- Directorate For Geosciences
- Division Of Earth Sciences [GRANTS:13878968] Funding Source: National Science Foundation
- Division Of Earth Sciences
- Directorate For Geosciences [0745543] Funding Source: National Science Foundation
Unlike other mammals, odontocetes and mysticetes have highly derived craniofacial bones. A growth process referred to as telescoping is partly responsible for this morphology. Here, we explore how changes in facial morphology during fetal growth relate to differences in telescoping between the adult odontocete Stenella attenuata and the mysticete Balaena mysticetus. We conclude that in both Stenella and Balaena head size increases allometrically. Similarly, odontocete nasal length and mysticete mouth size have strong positive allometry compared to total body length. However, the differences between odontocetes and mysticetes in telescoping are not directly associated with their fetal growth patterns. Our results suggest that cranial changes related to echolocation and feeding between odontocetes and mysticetes, respectively, begin during ontogeny before telescoping is initiated.
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