Index Catalog // ScholarsArchive@OSU

Skin Deep: An Assessment of New Zealand Blue Whale Skin Condition

Creator:: Barlow, Dawn R., Pepper, Acacia L., and Torres, Leigh G.
Abstract:: Skin condition assessment of wildlife can provide insight into individual and population health. Yet, logistics can limit skin condition assessment of large whales. We developed a standardized, quantitative protocol using photographs to assess skin condition of blue whales in New Zealand, and demonstrate the value gained by testing hypotheses, documenting...
Resource Type:: Article

Acoustic monitoring reveals the times and tides of harbor porpoise (Phocoena phocoena) distribution off central Oregon, U.S.A.

Creator:: Holdman, Amanda K., Haxel, Joseph H., Klinck, Holger, and Torres, Leigh G.
Abstract:: Harbor porpoises (Phocoena phocoena) are commonly observed in Oregon's nearshore marine environment yet knowledge of their ecosystem use and behavior remains limited, generating concerns for potential impacts on this species from future coastal development. Passive acoustic monitoring was used to investigate spatial and temporal variations in the presence and foraging...
Resource Type:: Article

Estimating morphometric attributes of baleen whales with photogrammetry from small UASs: A case study with blue and gray whales

Creator:: Burnett, Jonathan D., Lemos, Leila, Barlow, Dawn, Wing, Michael G., Chandler, Todd, and Torres, Leigh G.
Abstract:: Small unmanned aircraft systems (sUASs) are fostering novel approaches to marine mammal research, including baleen whale photogrammetry, by providing new observational perspectives. We collected vertical images of 89 gray and 6 blue whales using low cost sUASs to examine the accuracy of image based morphometry. Moreover, measurements from 192 images...
Resource Type:: Article

Drone Up! Quantifying Whale Behavior From a New Perspective Improves Observational Capacity

Creator:: Torres, Leigh G., Nieukirk, Sharon L., Lemos, Leila, and Chandler, Todd E.
Abstract:: During traditional boat-based surveys of marine megafauna, behavioral observations are typically limited to records of animal surfacings obtained from a horizontal perspective. Achieving an aerial perspective has been restricted to brief helicopter or airplane based observations that are costly, noisy, and risky. The emergence of commercial small unmanned aerial systems...
Resource Type:: Article

Drone Up! Quantifying Whale Behavior From a New Perspective Improves Observational Capacity

Creator:: Lemos, Leila, Chandler, Todd E., Torres, Leigh G., and Nieukirk, Sharon L.
Abstract:: During traditional boat-based surveys of marine megafauna, behavioral observations are typically limited to records of animal surfacings obtained from a horizontal perspective. Achieving an aerial perspective has been restricted to brief helicopter or airplane based observations that are costly, noisy, and risky. The emergence of commercial small unmanned aerial systems...
Resource Type:: Article

Assessment of vessel disturbance to gray whales to inform sustainable ecotourism

Creator:: Sullivan, Florence A. and Torres, Leigh G.
Abstract:: Ecotourism is a movement that seeks to sustain local communities by uniting conservation, travel, and education. To minimize effects on animal behavior, ecotourism operations must be carefully managed. Local management efforts that can be tailored to the specific area and animals may be more successful than broad‐scale efforts that may...
Resource Type:: Article

Tracking reveals limited interactions between Campbell Albatross and fisheries during the breeding season

Creator:: Sztukowski, Lisa A., van Toor, Mariëlle L., Weimerskirch, Henri, Thompson, David R., Torres, Leigh G., Sagar, Paul M., Cotton, Peter A., and Votier, Stephen C.
Abstract:: Fisheries-related mortality has been influential in driving global declines in seabird populations. Understanding the overlap between seabird distribution and fisheries is one important element in assessing bycatch risk, and may be achieved by tracking the movements of individual birds and fishing vessels. Here, we assess the spatiotemporal overlap between the...
Resource Type:: Article

Multiple steroid and thyroid hormones detected in baleen from eight whale species

Creator:: Lysiak, Nadine S., Moore, Michael J., Hunt, Kathleen E., Robbins, Jooke, Seton, Rosemary E., Buck, C. Loren, and Torres, Leigh G.
Abstract:: Recent studies have demonstrated that some hormones are present in baleen powder from bowhead (Balaena mysticetus) and North Atlantic right (Eubalaena glacialis) whales. To test the potential generalizability of this technique for studies of stress and reproduction in large whales, we sought to determine whether all major classes of steroid...
Resource Type:: Article

Addressing Challenges in the Application of Animal Movement Ecology to Aquatic Conservation and Management

Creator:: Ogburn, Matthew B., Mills Flemming, Joanna E., Harrison, Autumn-Lynn, Cooke, Steven J., Torres, Leigh G., and Whoriskey, Frederick G.
Abstract:: The dynamic nature of most environments forces many animals to move to meet their fundamental needs. This is especially true in aquatic environments where shifts in spatial ecology (which are a result of movements) are among the first adaptive responses of animals to changes in ecosystems. Changes in the movement...
Resource Type:: Article

A sense of scale : Foraging cetaceans’ use of scale-dependent multimodal sensory systems

Creator:: Torres, Leigh G.
Abstract:: Research on cetacean foraging ecology is central to our understanding of their spatial and behavioral ecology. Yet, functional mechanisms by which cetaceans detect prey across different scales remain unclear. Here, I postulate that cetaceans utilize a scale-dependent, multimodal sensory system to assess and increase prey encounters. I review the literature...
Resource Type:: Article

ScholarsArchive@OSU

Skin Deep: An Assessment of New Zealand Blue Whale Skin Condition

Acoustic monitoring reveals the times and tides of harbor porpoise (Phocoena phocoena) distribution off central Oregon, U.S.A.

Estimating morphometric attributes of baleen whales with photogrammetry from small UASs: A case study with blue and gray whales

Drone Up! Quantifying Whale Behavior From a New Perspective Improves Observational Capacity

Drone Up! Quantifying Whale Behavior From a New Perspective Improves Observational Capacity

Assessment of vessel disturbance to gray whales to inform sustainable ecotourism

Tracking reveals limited interactions between Campbell Albatross and fisheries during the breeding season

Multiple steroid and thyroid hormones detected in baleen from eight whale species

Addressing Challenges in the Application of Animal Movement Ecology to Aquatic Conservation and Management

A sense of scale : Foraging cetaceans’ use of scale-dependent multimodal sensory systems

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