- Title
- Mother-embryo isotope fractionation in the pygmy devilray Mobula kuhlii cf. eregoodootenkee
- Creator
- Broadhurst, Matt K.; Domit, Camila; Trevizani, Tailisi H.; Raoult, Vincent; Millar, Russell B.
- Relation
- NSW Department of Primary Industries
- Relation
- Journal of Fish Biology Vol. 95, Issue 2, p. 589-593
- Publisher Link
- http://dx.doi.org/10.1111/jfb.14010
- Publisher
- Wiley
- Resource Type
- journal article
- Date
- 2019
- Description
- 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.
- Subject
- batoids; embryos; gestation; histrotroph; Mobula; stable isotropes
- Identifier
- http://hdl.handle.net/1959.13/1412560
- Identifier
- uon:36499
- Identifier
- ISSN:0022-1112
- Rights
- This is the pre-peer reviewed version of the following article: Broadhurst, M. K., Domit, C. & Trevizani, T. H. et al. (2019) Mother-embryo isotope fractionation in the pygmy devilray Mobula kuhlii cf. eregoodootenkee, Journal of Fish Biology, 95(2) 589-593, which has been published in final form at https://doi.org/10.1111/jfb.14010. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions
- Language
- eng
- Full Text
- Reviewed
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