Metabolic connections to life history in fishes

Thesis type
(Thesis) M.Sc.
Date created
2020-12-09
Authors/Contributors
Author: Wong, Serena
Abstract
Metabolic rate is often assumed to set the pace of life histories because organisms depend upon the energy acquired through metabolism for survival, growth, and reproduction. However, key links between metabolic rate, morphology, and ecology remain unexamined. First, I examined the energetics behind brain size in the blacktip shark (Carcharhinus limbatus) using gill surface area as an integrated correlate of metabolic rate. Both brain mass and gill surface area increased with body mass throughout ontogeny and individuals with larger brains for their body mass also had larger gill surface areas. Second, I asked whether life history traits explained variation in resting metabolic rate across fishes and found that only growth performance, which encompasses the trade-off between growth and maximum size, explained variation. Collectively, this work illustrates the importance of energetic trade-offs and emphasizes the need for empirical tests of assumptions and an integrated view of physiology and ecology.
Document
Identifier
etd21173
Copyright statement
Copyright is held by the author(s).
Permissions
This thesis may be printed or downloaded for non-commercial research and scholarly purposes.
Supervisor or Senior Supervisor
Thesis advisor: Dulvy, Nicholas
Language
English
Member of collection
Attachment Size
input_data\21095\etd21173.pdf 1.43 MB