marine mammals; education; adaptation to marine life; anatomy of marine mammals; diving response; thermoregulation
Abstract :
[en] Marine mammals include toothed and baleen whales, as well as seals, sea lions, sea cows, sea otters and polar bears. They are adapted to an aquatic life in oceanic, coastal and riverine habitats. They range in size from sea otters to blue whales. The extreme diversity of marine mammals is related to their adaptations to different habitats and their use of different feeding strategies. The different kinds of marine mammals are not closely related but evolved from different terrestrial ancestors. Because they have been exposed to similar environmental constraints in their aquatic way of life, many evolutionary convergences can be found in different lineages. They have torpedo-shaped bodies, thick fur or fat layers to preserve heat, as well as impressive diving abilities. Here, we discuss these adaptations in their physiology and anatomy. Through hands-on exercises, students can test how their own muscle strength and heartbeat are affected by cold water.
Research Center/Unit :
FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège
Disciplines :
Zoology Aquatic sciences & oceanology
Author, co-author :
Das, Krishna ; Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Océanographie biologique ; Université de Liège - ULiège > Freshwater and OCeanic science Unit of reSearch (FOCUS)
Sköld, Hélène
Lorenz, Anna
Parmentier, Eric ; Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Morphologie fonctionnelle et évolutive ; Université de Liège - ULiège > Freshwater and OCeanic science Unit of reSearch (FOCUS)
Language :
English
Title :
Who are the marine mammals?
Publication date :
2023
Main work title :
Marine mammals: A deep dive in the world of science
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Bibliography
Berta A 2012. Return to the Sea. The life and evolutionary times of marine mammals. University of California Press.
Elmegaard SL, Johnson M, Madsen PT, McDonald BI 2016. Cognitive control of heart rate in diving harbour porpoises. Curr Biol. 26(2): R1175-6. https://doi.org/10.1016/j.cub.2016.10.020.
Hiebert SM, Burch E 2003. Simulated human diving and heart rate: making the most of the diving response as a laboratory exercie. Adv Physiol Educ. 27(3): 130-45. https://doi.org/10.1152/advan.00045.2002.
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