[MARMAM] Franklin et al 2018: Site-specific female-biased sex ratio of humpback whales during a stopover early in the southern migration

Wally Franklin wally at oceania.org.au
Fri Jun 15 17:07:33 PDT 2018


Hi MARMAM,

Further to our posting of 7th February 2018, on behalf of all Authors I am pleased to announce publication in Volume 96, Issue 6, pp533-544, Canadian Journal of Zoology of:

Site-specific female-biased sex ratio of humpback whales during a stopover early in the southern migration
Trish Franklin; , Wally Franklin; , Lyndon Brooks; , Peter L Harrison 

Published on the web 20 December 2017.
Received March 28, 2017. 
Canadian Journal of Zoology, https://doi.org/10.1139/cjz-2017-0086 <https://doi.org/10.1139/cjz-2017-0086> <>
ABSTRACT

Previous research on humpback whales (Megaptera novaeangliae (Borowski, 1781)), in both the Northern and Southern Hemispheres, has reported site-specific male-biased sex ratios in breeding grounds and along migratory corridors. However, one recent Southern Hemisphere study reported a female-biased sex ratio in a feeding area within a coastal migratory corridor, indicating that females may preferentially occupy some habitats. We investigated the classes and relative seasonal timing of humpback whales using Hervey Bay as a stopover early in the southern migration. Modeling and analyzes were undertaken using data from resighting histories of 361 individually identified whales between 1992 and 2009. The data consisted of 2,131 sightings categorized by either sex, age, reproductive or maturational status. A female-biased sex ratio of 2.94:1 indicates that Hervey Bay is a preferential stopover for females. The data revealed that the bay is important for mature females who co-occur with immature males and females during August. While during September and October mothers with calves accompanied by a few escorts dominate the Bay. Immature males and females socialize with mature females during August and September. The data support the hypothesis that habitat preferences and differential migration of females and males provides a plausible explanation for site-specific sex-bias in breeding grounds, migratory stopovers and along migratory corridors.


A PDF of the article and supplementary information is available at: https://doi.org/10.1139/cjz-2017-0086 <https://doi.org/10.1139/cjz-2017-0086> 

Any enquiries regarding the manuscript please contact: trish at oceania.org.au <mailto:trish at oceania.org.au> 

Regards,


Trish Franklin, on behalf of all Authors


........................................................................
Trish Franklin PhD
The Oceania Project
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 <http://epubs.scu.edu.au/theses/357/>Dr Trish Franklin <http://epubs.scu.edu.au/theses/357/> |  <https://soundcloud.com/iwhales> <https://epubs.scu.edu.au/theses/357/>PhD Thesis <http://epubs.scu.edu.au/theses/357/>    Google Scholar Citations <https://scholar.google.com.au/citations?hl=en&user=RAOLIrMAAAAJ&view_op=list_works&sortby=pubdate>
 <http://epubs.scu.edu.au/theses/422/>Dr Wally Franklin <http://epubs.scu.edu.au/theses/422/>  <http://epubs.scu.edu.au/theses/422/>|  <https://soundcloud.com/iwhales>PhD Thesis <http://epubs.scu.edu.au/theses/422/>  <https://epubs.scu.edu.au/theses/422/>  Google Scholar Citations <https://scholar.google.com.au/citations?hl=en&user=2wA6lL8AAAAJ&view_op=list_works&sortby=pubdate>

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