Journal article
Mother–embryo isotope fractionation in the pygmy devilray Mobula kuhlii cf. eregoodootenkee
Journal of Fish Biology, Vol.95(2), pp.589-593
08/2019
PMID: 31087344
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Source: InCites
Abstract
We determined stable-isotope ratios for replicate muscle tissues in 13 gravid Mobula kuhlii cf. eregoodootenkee (110.4–120.4 cm disc width; WD) and their embryos (7.0–42.3 cm WD) and also yolks and histrotroph, to assess the potential implications for juvenile nutrition and habitat use. Irrespective of their development in the uterus, embryos had similar δ13C values in their muscle tissue as the mothers and both had greater values than in the histotroph. During gestation, δ13C values increased across all sample types. However, while embryo muscle tissue and the histotroph were associated with increasing 15N levels during embryonic development, this was depleted in the mothers’ muscle tissue and yolk. Although speculative, the observed variation in stable-isotope ratios might imply a dietary shift among gravid females during their early gestation. Irrespective of the underlying mechanisms, the results indicate neonates will have relatively greater δ15N values than post-partum females, which would probably confound juvenile foraging-ecology estimates.
Details
- Title
- Mother–embryo isotope fractionation in the pygmy devilray Mobula kuhlii cf. eregoodootenkee
- Creators
- Matt K Broadhurst - NSW Department of Primary IndustriesCamila Domit - Universidade Federal do ParanáTailisi H Trevizani - University of Sao PauloVincent Raoult - University of Newcastle AustraliaRussell B Millar - University of Auckland
- Publication Details
- Journal of Fish Biology, Vol.95(2), pp.589-593
- Publisher
- Wiley-Blackwell Publishing Ltd.
- Grant note
- The sample collection and SI analyses were funded by the NSW Department of Primary Industries.
- Identifiers
- 991012925685802368
- Copyright
- © 2019 The Fisheries Society of the British Isles and Commonwealth of Australia
- Academic Unit
- Faculty of Science and Engineering; School of Environment, Science and Engineering
- Language
- English
- Resource Type
- Journal article