A critical assessment of marine predator isoscapes within the southern Indian Ocean.

ABSTRACT:

Background

Precise and accurate retrospective geolocation of marine predators via their tissues' isotopic composition relies on quality reference maps of relevant isotopic gradients ("isoscapes"). Additionally, a good working knowledge of any discrimination factors that may offset a marine predator's isotopic composition from baseline isotopic values, as well as tissue specific retention rates, are imperative. We provide a critical assessment of inter-specific differences among marine predator-level isoscapes within the Indian Sector of the Southern Ocean.

Methods

We combined fine-scale GPS tracking data and concurrent blood plasma δ¹³C and δ¹⁵N values of eight seabird species (three albatross, two giant petrel and three penguin species) breeding at Mar

SUBMITTER: Carpenter-Kling T 

PROVIDER: S-EPMC7322845 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature