Index Catalog // ScholarsArchive@OSU

Body Condition and Hormone Assessment of Eastern North Pacific Gray Whales (Eschrichtius robustus) and Associations with Ambient Noise

Creator:: Lemos, Leila S.
Abstract:: Anthropogenic activities have posed many threats to the oceans and marine life. Understanding how individuals are affected and physiologically respond to these threats is crucial and allows for management and conservation applications. I evaluated the overall health condition of a subpopulation of gray whales (Eschrichtius robustus) along the Oregon coast,...
Resource Type:: Dissertation
Full Text:: ABSTRACT OF THE DISSERTATION OF Leila Soledade Lemos for the degree of Doctor of Philosophy in Wildlife

Intra‐ and inter‐annual variation in gray whale body condition on a foraging ground

Creator:: Soledade Lemos, Leila, Burnett, Jonathan D., Chandler, Todd E., Sumich, James L., and Torres, Leigh G.
Abstract:: Baleen whales store energy gained on foraging grounds to support reproduction and other metabolic needs while fasting for long periods during migration. Whale body condition can be used to monitor foraging success, and thus better understand and anticipate individual‐ and population‐level trends in reproduction and survival. We assessed the body...
Resource Type:: Article
Full Text:: foraging ground LEILA SOLEDADE LEMOS ,1,� JONATHAN D. BURNETT ,2 TODD E. CHANDLER,1 JAMES L. SUMICH ,3

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
Full Text:: : Torres LG, Nieukirk SL, Lemos L and Chandler TE (2018) Drone Up! Quantifying Whale Behavior From a New

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
Full Text:: : Torres LG, Nieukirk SL, Lemos L and Chandler TE (2018) Drone Up! Quantifying Whale Behavior From a New

Assessment of fecal steroid and thyroid hormone metabolites in eastern North Pacific gray whales

Creator:: Lemos, Leila S., Olsen, Amy, Smith, Angela, Chandler, Todd E., Larson, Shawn, Hunt, Kathleen, and Torres, Leigh G.
Abstract:: Baleen whale fecal samples have high potential for endocrine monitoring, which can be used as a non-invasive tool to identify the physiological response to disturbance events and describe population health and vital rates. In this study, we used commercial enzyme-linked immunosorbent assays to validate and quantify fecal steroid (progestins, androgens...
Resource Type:: Article
Full Text:: thyroid hormone metabolites in eastern North Pacific gray whales Leila S. Lemos1,*, Amy Olsen2, Angela

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

Tonight’s Specials Include Mysids, Amphipods, and More: An Examination of the Zooplankton Prey of Oregon Gray Whales and its Impact on Foraging Choices and Prey Selection

Creator:: Hildebrand, Lisa
Abstract:: Understanding prey quality and prey selection by predators is critical for management efforts aimed at identification and protection of essential habitats and prey. Marine predators must make daily foraging choices in a heterogenous and dynamic environment in order to meet the high energetic demands of migration, reproduction and foraging. With...
Resource Type:: Masters Thesis
Full Text:: critical body mass over the course of the feeding season on their northwest Pacific range (Soledade Lemos

Do gray whales count calories? Comparing energetic values of gray whale prey across two different feeding grounds in the eastern North Pacific

Creator:: Hildebrand, Lisa, Bernard, Kim S., and Torres, Leigh G.
Abstract:: Predators must consume enough prey to support costly events, such as reproduction. Meeting high energetic requirements is particularly challenging for migrating baleen whales as their feeding seasons are typically restricted to a limited temporal window and marine prey are notoriously patchy. We assessed the energetic value of the six most...
Resource Type:: Article
Full Text:: mass throughout a foraging season (Soledade Lemos et al., 2020) and successfully recruit calves

Ecology and Distribution of Blue Whales in New Zealand Across Spatial and Temporal Scales

Creator:: Barlow, Dawn R.
Abstract:: The distribution of mobile marine predators often reflects underlying dynamic ecological processes. The geographical focus of this PhD is the South Taranaki Bight (STB) of New Zealand, where wind-driven coastal upwelling generates productivity and prey to support a blue whale foraging ground. The STB is also New Zealand’s most industrial...
Resource Type:: Dissertation
Full Text:: : Florence Sullivan, Amanda Holdman, Erin Pickett, Solene Derville, Rachael Orben, Leila Lemos, Dom Kone

2019 Fall OSU Extended Campus schedule of classes

Creator:: Oregon State University
Resource Type:: Other

ScholarsArchive@OSU

Body Condition and Hormone Assessment of Eastern North Pacific Gray Whales (Eschrichtius robustus) and Associations with Ambient Noise

Intra‐ and inter‐annual variation in gray whale body condition on a foraging ground

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 fecal steroid and thyroid hormone metabolites in eastern North Pacific gray whales

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

Tonight’s Specials Include Mysids, Amphipods, and More: An Examination of the Zooplankton Prey of Oregon Gray Whales and its Impact on Foraging Choices and Prey Selection

Do gray whales count calories? Comparing energetic values of gray whale prey across two different feeding grounds in the eastern North Pacific

Ecology and Distribution of Blue Whales in New Zealand Across Spatial and Temporal Scales

2019 Fall OSU Extended Campus schedule of classes

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