Identifying beaked whale foraging habitat in the tongue of the ocean, Bahamas

Apr 27, 2011

In a recent study to be published on April 27, 2011, in the peer-reviewed open-access journal PLoS ONE, Dr. Elliott Hazen and colleagues found that oceanographic and prey measurements can be used to identify beaked whale foraging habitat. The research team from Duke University, Woods Hole, and the Naval Undersea Warfare Center listened for foraging beaked whales and measured ocean features and distributions of prey off the east coast of Andross Island in the Bahamas.

Their manuscript provides evidence that these difficult to study deep-diving creatures use specific features such as salinity and temperature to find their prey. This is the first study describing their distribution and feeding habitat relative to ocean features Blaineville's beaked whales regularly dive over 1000 meters for over an hour in search of prey which varies from 400-1000 meters. The shy and elusive toothed whales feed primarily on fish and squid in the ocean's deep scattering layer, an important prey resource for many species throughout the world's oceans. In addition, Blaineville's beaked whales are listed as data deficient by the IUCN, and very little is currently known about the ecology of these creatures. Beaked whale species are thought to be sensitive to noise arising from certain human activities; in 2000, beaked whale strandings were observed coinciding with naval sonar exercises in the Bahamas. Understanding the distribution and behavior of these species is important to minimize harmful impacts from human uses of the ocean. Researchers worked aboard the R/V Revelle, an 86-meter vessel out of Scripps Institute of Marine Science. Fisheries acoustics data found scattering layers of prey on the western edge of the tongue of the ocean were denser than those at the eastern edge. Eighty-two bottom-mounted hydrophones also recorded increased foraging activity on the western edge of the basin.

The hydrophone range at AUTEC allowed for unprecedented measurements of the habitat and behavior of these elusive predators providing "necessary insight into how interact with their environment". Studies on harbor porpoises and bottlenose dolphins have shown how modeling habitat can be a powerful tool to inform spatially adaptive management of pelagic predators (Bailey and Thompson 2009, Embling et al. 2009). Further work is necessary to determine whether this foraging model could be extrapolated to other seasons or populations.

Explore further: Rare albino dolphin captured in Japan's 'Cove'

More information: Citations:
Embling C, Gillibrand P, Gordon J, Shrimpton J (2009) Using habitat models to identify suitable sites for marine protected areas for harbour porpoises (Phocoena phocoena). Biological Conservation 143: 267-279.

Bailey H, Thompson P (2009) Using marine mammal habitat modelling to identify priority conservation zones within a marine protected area. Marine Ecology Progress Series 378: 279-287.

Manuscript Citation:
Citation: Hazen EL, Nowacek DP, St. Laurent L, Halpin PN, Moretti DJ (2011) The Relationship among Oceanography, Prey Fields, and Beaked Whale Foraging Habitat in the Tongue of the Ocean. PLoS ONE 6(4): e19269. doi:10.1371/journal.pone.0019269

add to favorites email to friend print save as pdf

Related Stories

Beaked Whales Perform Extreme Dives to Hunt Deepwater Prey

Oct 20, 2006

A study of ten beaked whales of two poorly understood species shows their foraging dives are deeper and longer than those reported for any other air-breathing species. This extreme deep-diving behavior is of particular interest ...

Prey-tell: Why right whales linger in the Gulf of Maine

Apr 26, 2011

(PhysOrg.com) -- As they might with most endangered animals, scientists consider the whereabouts and activities of right whales extremely important. "It is helpful to know where they go, why they go there ...

Engineers design tools to study sound effects on whales

Aug 31, 2010

(PhysOrg.com) -- A combination of the biology of marine mammals, mechanical vibrations and acoustics has led to a breakthrough discovery allowing scientists to better understand the potential harmful effects ...

Probing question: Why do whales beach themselves?

Apr 25, 2008

Whales are the largest marine mammals in the world — the smallest species weigh in at several tons. When whales beach themselves, they can die simply from the crushing weight of their own bodies or from overheating due ...

Recommended for you

Dogs hear our words and how we say them

3 hours ago

When people hear another person talking to them, they respond not only to what is being said—those consonants and vowels strung together into words and sentences—but also to other features of that speech—the ...

Amazonian shrimps: An underwater world still unknown

5 hours ago

A study reveals how little we know about the Amazonian diversity. Aiming to resolve a scientific debate about the validity of two species of freshwater shrimp described in the first half of the last century, ...

Factors that drive sexual traits

6 hours ago

Many male animals have multiple displays and behaviours to attract females; and often the larger or greater the better.

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.