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Quantifying the energy stores of capital breeding humpback whales and income breeding sperm whales using historical whaling records

Citation

Irvine, L and Thums, M and Hanson, CE and McMahon, CR and Hindell, MA, Quantifying the energy stores of capital breeding humpback whales and income breeding sperm whales using historical whaling records, Royal Society Open Science, 4, (3) Article 160290. ISSN 2054-5703 (2017) [Refereed Article]


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Copyright Statement

Copyright 2016 The authors. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/

DOI: doi:10.6084/m9.figshare.c.3709492.v3

Abstract

Cetacean energy stores are known to vary according to life history, reproductive status and time of year; however, the opportunity to quantify these relationships is rare. Using a unique set of historical whaling records from Western Australia (19521963), we investigated energy stores of large cetaceans with differing life histories, and quantified the relationship between total body lipid and length for humpback whales (Megaptera novaeangliae) (n = 905) and sperm whales (Physeter macrocephalus) (n = 1961). We found that total body lipid increased with body length in both humpback and sperm whales, consistent with size-related energy stores. Male humpback whales stored 2.49 kl (15.6 barrels) (31.974.9%) more lipid than male sperm whales of equivalent length, to fuel their annual migration. Relative lipid stores of sperm whales (males) were constant throughout the year, while those of humpback whales varied with reproductive class and sampling date. Pregnant female humpback whales had higher relative energy stores than non-pregnant females and males (26.2% and 37.4%, respectively), to fuel the energy demands of gestation and lactation. Those that reached the sampling site later (en route to their breeding grounds) carried higher lipid stores than those that arrived earlier, possibly reflecting individual variation in residency times in the Antarctic feeding grounds. Importantly, longer pregnant females had relatively larger energy stores than the shorter pregnant females, indicating that the smaller individuals may experience higher levels of energetic stress during the migration fast. The relationships we developed between body lipid and length can be used to inform bioenergetics and ecosystem models when such detailed information is not available.

Item Details

Item Type:Refereed Article
Keywords:whales, energetics, bioenergetics, body condition, body lipid, oil yield, life history, cetacean
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Marine and Estuarine Ecology (incl. Marine Ichthyology)
Objective Division:Environment
Objective Group:Ecosystem Assessment and Management
Objective Field:Ecosystem Assessment and Management of Antarctic and Sub-Antarctic Environments
Author:Irvine, L (Ms Lynette Irvine)
Author:McMahon, CR (Dr Clive McMahon)
Author:Hindell, MA (Professor Mark Hindell)
ID Code:117141
Year Published:2017
Deposited By:Ecology and Biodiversity
Deposited On:2017-06-01
Last Modified:2018-05-28
Downloads:18 View Download Statistics

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