Differences in δ15N and δ13C between embryonic and maternal tissues of the ovoviviparous bluntnose sixgill shark Hexanchus griseus. Issue 4 (2nd March 2020)

• Record Type: Journal Article
• Authors: Osgood, Geoffrey J.; Timmer, Brian; Cox, Kieran; Juanes, Francis; Baum, Julia K.
• Is Part Of: Journal of fish biology. Volume 96:Issue 4(2020)
• Page Start: 1060
• Page End: 1064
• Publication Date: 2020-03-02
• Subjects: elasmobranch -- embryos -- liver -- maternal provisioning -- muscle -- stable isotopes -- yolk; Fishes -- Periodicals; Fishes -- Great Britain -- Periodicals; 597
• DOI: 10.1111/jfb.14294
• Languages: English
• ISSNs: 0022-1112

Abstract

Abstract: Stable nitrogen (δ 15 N) and carbon (δ 13 C) isotope ratios from muscle, liver and yolk were analysed from the mother and embryos of an ovoviviparous shark, Hexanchus griseus . Embryonic liver and muscle had similar δ 15 N and δ 13 C ratios or were depleted in heavy isotopes, compared to the same maternal somatic and reproductive yolk tissues, but no relationship existed between δ 15 N or δ 13 C and embryo length, as expected, because a switch to placental nourishment is lacking in this species. This study expands the understanding of maternal nourishment and embryonic stable isotope differences in ovoviviparous sharks.