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Transgenerational marking of cephalopods with an enriched barium isotope: a promising tool for empirically estimating post-hatching movement and population connectivity

Citation

Pecl, GT and Doubleday, ZA and Danyushevsky, LV and Gilbert, S and Moltschaniwskyj, NA, Transgenerational marking of cephalopods with an enriched barium isotope: a promising tool for empirically estimating post-hatching movement and population connectivity, ICES Journal of Marine Science , 67, (7) pp. 1372-1380. ISSN 1054-3139 (2010) [Refereed Article]

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The definitive publisher-authenticated version is available online at: www.oxfordjournals.org

DOI: doi:10.1093/icesjms/fsq025

Abstract

Quantifying the movement of very small and young individuals, determining sources of recruitment, and identifying the contribution of populations from different regions and periods to fished stocks is a major ecological challenge. Transgenerational isotope labelling (TRAIL), a technique which enables offspring to be marked on a mass scale, is applied for the first time to cephalopods, facilitating field studies quantifying population connectivity. Four species were used: Sepioteuthis australis, Euprymna tasmanica, Octopus pallidus, and Octopus maorum. Gravid females were injected with the enriched stable isotope 137Ba in different body tissues at several different doses. Isotopic ratios 138Ba:137Ba were then quantified using laser ablation inductively coupled plasma-mass spectrometry on the hard structures (statoliths and stylets) of offspring produced by the injected females. Day-old hatchlings from both squid species had statoliths with isotopic ratios significantly different from natural ratios and control animals, but variability in the ratios in hatchlings produced by different females was independent of dose or injection location. No differences were observed in the statoliths and stylets removed from hatchlings and juveniles, respectively, from the two octopus species, although isotopic shifts were evident in the hard structures of the adults injected. The use of TRAIL is a technique that offers considerable potential to advance the understanding of post-hatching dispersal and population connectivity in cephalopod populations.

Item Details

Item Type:Refereed Article
Keywords:barium isotopes,enriched isotapes,hatchling movement,larval marking,mass marking,population connectivity,statolith chemistry
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Behavioural Ecology
Objective Division:Environment
Objective Group:Flora, Fauna and Biodiversity
Objective Field:Marine Flora, Fauna and Biodiversity
Author:Pecl, GT (Professor Gretta Pecl)
Author:Doubleday, ZA (Dr Zoe Doubleday)
Author:Danyushevsky, LV (Professor Leonid Danyushevsky)
Author:Gilbert, S (Ms Sarah Gilbert)
Author:Moltschaniwskyj, NA (Associate Professor Natalie Moltschaniwskyj)
ID Code:66513
Year Published:2010
Web of Science® Times Cited:5
Deposited By:TAFI - Marine Research Laboratory
Deposited On:2011-02-01
Last Modified:2011-03-22
Downloads:1 View Download Statistics

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