SCIENCE@home

Stable isotopic composition of Antarctic and Patagonian marine mammals collected before and during industrial-scale whaling: assessing the baseline for long-term changes in the marine ecosystem

E. Genelt-Yanovskiy,Anna S. Genelt-Yanovskaya,Maria Fontanals-Coll,K. Yamoah,Oliver E. Craig,R. Sabin,J. Scourse

Published 2025 in bioRxiv

ABSTRACT

Great Antarctic expeditions, seal hunting and whaling industries left a legacy in natural history collections. To provide the basis for analysing the impact of whaling on marine ecosystem structuring, we conducted the bulk isotope analysis from the specimens of baleen whales (Balaenoptera musculus and B. physalus), and seals (Arctocephalus australis and Hydrurga leptonyx) collected between 1843 to 1951 from the South Atlantic, Patagonian waters, Southern Ocean and Antarctic coastal seas, and preserved in the collection of Natural History Museum, London. Analysis of this material indicates the pre-industrial whaling state of these environments, and changes in the trophic position of whales and seals during the period of extensive human pressure. Having controlled for the Suess effect, δ13C values in B. musculus, B. physalus and H. leptonyx were different before and after the onset of industrial-scale whaling (1904). Bone collagen δ15N values and corresponding trophic position indicate possible trophic changes in A. australis, and variability of the foraging areas of B. musculus. This study highlights the use of museum specimens for tracing historical trends associated with changes in the population structure and distribution of species and which indicate long- term variability in their foraging ecology.

PUBLICATION RECORD

CITATION MAP

EXTRACTION MAP

CLAIMS

  • No claims are published for this paper.

CONCEPTS

  • No concepts are published for this paper.

REFERENCES

Showing 1-100 of 100 references · Page 1 of 1

CITED BY