Sexually dimorphic measurements from stranded and bycaught specimens contribute to the characterization of group composition in free-ranging common dolphins (Delphinus spp.) from aerial images

Leander, Samantha G. M.; Durban, John W.; Danil, Kerri; Fearnbach, Holly; Joyce, Trevor W.; Ballance, Lisa T.

doi:10.1111/mms.12804

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Sexually dimorphic measurements from stranded and bycaught specimens contribute to the characterization of group composition in free-ranging common dolphins (Delphinus spp.) from aerial images

2021
By Leander, Samantha G. M. ; Durban, John W. ; Danil, Kerri ; ...
Source: Marine Mammal Science, 37(4), 1507-1513

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Journal Title:

Marine Mammal Science
Personal Author:

Leander, Samantha G. M. ; Durban, John W. ; Danil, Kerri ; Fearnbach, Holly ; Joyce, Trevor W. ; ... More +

Leander, Samantha G. M. ; Durban, John W. ; Danil, Kerri ; Fearnbach, Holly ; Joyce, Trevor W. ; Ballance, Lisa T. Less -
NOAA Program & Office:

NMFS (National Marine Fisheries Service) ; SWFSC (Southwest Fisheries Science Center)

NMFS (National Marine Fisheries Service) ; SWFSC (Southwest Fisheries Science Center) Less -
Description:

Short-beaked (Delphinus delphis delphis) and long-beaked (D. d. bairdii) common dolphins are the most commonly sighted cetaceans in waters off California (Barlow, 2016; Campbell et al., 2015; Carretta & Chivers, 2005; Heyning & Perrin, 1994). Despite the frequency of sightings, little is known about the demographic structure of their schools. This information is important for understanding risks: for example, D. d. delphis is the most commonly entangled species in California's thresher shark and swordfish drift gill net fishery (Carretta & Chivers, 2005; Carretta et al., 2017), and vulnerability to entanglement may be related to the sex of individuals (Danil et al., 2010; Perryman & Lynn, 1993). Additionally, there is evidence that male D. d. bairdii are more susceptible to domoic acid toxicity, which could be attributed to sex, age, or reproductive class segregation (Danil et al., 2021; de la Riva et al., 2013).
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Dolphins Sexual Dimorphism (Animals)
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Marine Mammal Science, 37(4), 1507-1513
DOI:

https://doi.org/10.1111/mms.12804
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Journal Article
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urn:sha256:6312282c3b85a9cfff83f4484bf2805057b5f0ca6c0bf329d8a0c41cc6e29f46
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https://repository.library.noaa.gov/view/noaa/32912/noaa_32912_DS1.pdf
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Sexually dimorphic measurements from stranded and bycaught specimens contribute to the characterization of group composition in free-ranging common dolphins (Delphinus spp.) from aerial images

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