Accession Number:

AD1103388

Title:

Diving Behavior and Fine-Scale Kinematics of Free-Ranging Risso's Dolphins Foraging in Shallow and Deep-Water Habitats

Descriptive Note:

Journal Article - Open Access

Corporate Author:

University of California, Santa Cruz Santa Cruz United States

Report Date:

2019-03-12

Pagination or Media Count:

15.0

Abstract:

Air-breathing marine predators must balance the conflicting demands of oxygen conservation during breath-hold and the cost of diving and locomotion to capture prey. However, it remains poorly understood how predators modulate foraging performance when feeding at different depths and in response to changes in prey distribution and type. Here, we used high-resolution multi-sensor tags attached to Rissos dolphins Grampus griseus and concurrent prey surveys to quantify their foraging performance over a range of depths and prey types. Dolphins N 33 foraged in shallow and deep habitats seabed depths less or more than 560m, respectively and within the deep habitat, in vertically stratified prey features occurring at several aggregation levels

Subject Categories:

  • Biology
  • Ecology
  • Biology
  • Ecology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE