An evaluation of body condition and morphometric relationships within southern California juvenile white sharks Carcharodon carcharias

Length, mass and girth relationships are presented for 112 juvenile white sharks (JWS) Carcharodon carcharias caught in the Southern California Bight (SCB) nursery area between June 2008 and August 2017. No difference was found between male and female JWS length–mass relationships, but data suggest...

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Bibliographic Details
Published inJournal of fish biology Vol. 93; no. 5; pp. 842 - 849
Main Authors Logan, Ryan K., White, Connor F., Winkler, Chuck, Jorgensen, Salvador J., O'Sullivan, John B., Lowe, Christopher G., Lyons, Kady
Format Journal Article
LanguageEnglish
Published Oxford, UK Blackwell Publishing Ltd 01.11.2018
Wiley Subscription Services, Inc
Subjects
Animal behavior
Animals
Body condition
Body Constitution - physiology
California
Carcharodon carcharias
Condition factor
Evaluation
Female
hepato‐somatic index
Juveniles
Lamnidae
Length
length–mass
Lipids
Liver
Male
Marine fishes
Mass
morphometrics
Morphometry
Nursery grounds
Pacific Ocean
Parameter estimation
Rare species
Sharks
Sharks - anatomy & histology
Sharks - physiology
southern California
Threatened species
Vulnerable species
white shark
Pacific Ocean
California
white shark
southern California
morphometrics
body condition
length-mass
hepato-somatic index
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Summary:Length, mass and girth relationships are presented for 112 juvenile white sharks (JWS) Carcharodon carcharias caught in the Southern California Bight (SCB) nursery area between June 2008 and August 2017. No difference was found between male and female JWS length–mass relationships, but data suggest that JWS in the SCB gain more mass per unit length for the juvenile size classes compared with other C. carcharias populations. Condition‐factor‐to‐liver‐mass and condition‐factor‐to‐liver‐lipid‐content relationships revealed that length and mass (i.e., condition factor) can be used as a non‐invasive proxy for body condition for juveniles of this species. The parameters estimated in this study are key information for population assessments of juvenile C. carcharias in the north‐east Pacific Ocean and will contribute to the conservation and management of this IUCN Red List Vulnerable species.
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ISSN:0022-1112
1095-8649
DOI:10.1111/jfb.13785