Results 61 to 70 of about 2,783 (182)

Utility of telomere length measurements for age determination of humpback whales

NAMMCO Scientific Publications, 2014
This study examines the applicability of telomere length measurements by quantitative PCR as a tool for minimally invasive age determination of free-ranging cetaceans.
Morten Tange Olsen, Jooke Robbins, Martine Bérubé, Mary Beth Rew, Per J Palsbøll   +4 more
doaj   +1 more source

Maximizing eDNA detections of rare marine organisms: A case study of a delphinid species

Methods in Ecology and Evolution, EarlyView.
Abstract Environmental DNA (eDNA) is an emerging tool for surveying marine organisms. Advances in molecular assay designs and bioinformatic methods provide new opportunities for detecting rare species; however, overcoming methodological challenges of rare species detection remains an important obstacle for the widespread deployment of eDNA methods for ...
Nastassia V. Patin, Eiren K. Jacobson, Zachary Gold, Amy M. Van Cise, Julie Dinasquet, Bryce Ellman, Robert H. Lampe, Anne Schulberg, Noelle Bowlin, Ryan Freedman, Erin Satterthwaite, Andrew E. Allen, Brice X. Semmens   +12 more
wiley   +1 more source

Sexing From Seawater: Application of Environmental DNA Beyond Species Detection for Cetaceans

Environmental DNA
Anthropogenic pressures on marine ecosystems are intensifying, highlighting the need to bridge knowledge gaps for species at risk. Data deficiencies, particularly for species recovering from historic declines, such as marine megafauna like whales, hinder
Chloe Victoria Robinson, Emma June Laqua, Adam Warner, Gary J. Sutton, Michael W. D. Judson, Karina Dracott   +5 more
doaj   +1 more source

The Influence of the East Australian Current on the Regional Distribution of Humpback Whales (Megaptera novaeangliae)

Journal of Marine Science and Engineering
Humpback whales (Megaptera novaeangliae) migrate annually along the east coast of Australia, utilizing various habitats, including open embayments such as the Gold Coast bay (GCB) in southeast Queensland, for resting and social behaviors.
Patrick Woletz, Jan-Olaf Meynecke
doaj   +1 more source

Novel class identification: A human‐in‐the‐loop approach for efficient species recognition in bioacoustic data

Methods in Ecology and Evolution, EarlyView.
Abstract Passive acoustic monitoring (PAM) is widely used to collect large‐scale wildlife data encompassing many species, but efficiently identifying all species—particularly rare and potentially endangered ones—without exhaustive manual examination of the entire dataset remains a major challenge.
Hannes Kath, Thiago S. Gouvêa, Daniel Sonntag   +2 more
wiley   +1 more source

Comparative review of entanglement risk assessments for cetacean conservation and management

Conservation Biology, EarlyView.
Abstract Cetacean entanglement in fishing gear remains a major global threat that exposes persistent gaps in how fisheries management frameworks manage risk to nontarget species. Ecological risk assessment (ERA) offers a structured way to link exposure and consequences to an explicit statement of risk, but entanglement risk assessments vary widely in ...
Laura Joan Feyrer, Clair Evers, Hilary Moors‐Murphy   +2 more
wiley   +1 more source

Observer coverage and interaction rates determine the choice between design‐based and machine learning bycatch estimators for rare species

Conservation Biology, EarlyView.
Abstract Robust estimates of the magnitude of protected species bycatch are essential for effective fisheries management and marine conservation. Existing bycatch estimation methods typically struggle to accurately and precisely estimate the bycatch of rare species as a result of the statistical assumptions necessary to overcome infrequent encounters ...
Christopher Long, Robert Ahrens, T. Todd Jones, Zachary Siders   +3 more
wiley   +1 more source

Drone-based photogrammetry reveals differences in humpback whale body condition and mass across North Atlantic foraging grounds

Frontiers in Marine Science
Baleen whales are key consumers in marine ecosystems and can serve as ecosystem sentinels. Body condition, defined as an individual’s energy stores relative to its structural size, can provide a useful proxy for health in baleen whales.
Chelsi Napoli, Nathan Hirtle, Julia Stepanuk, Fredrik Christiansen, Eleanor I. Heywood, Thomas J. Grove, Alyssa Stoller, Flordespina Dodds, Maria Glarou, Marianne H. Rasmussen, Gina L. Lonati, Kimberley T.A. Davies, Simone Videsen, Malene J. Simon, Tenna K. Boye, Ann Zoidis, Ann Zoidis, Sean K. Todd, Lesley H. Thorne, Lesley H. Thorne   +19 more
doaj   +1 more source

Leave or stay? Video-logger revealed foraging efficiency of humpback whales under temporal change in prey density.

PLoS ONE, 2019
Central place foraging theory (CPF) has been used to predict the optimal patch residence time for air-breathing marine predators in response to patch quality.
Yu Akiyama, Tomonari Akamatsu, Marianne H Rasmussen, Maria R Iversen, Takashi Iwata, Yusuke Goto, Kagari Aoki, Katsufumi Sato   +7 more
doaj   +1 more source

Time‐stressed Bar‐tailed Godwits exploit novel prey during migratory fuelling

Ibis, EarlyView.
Long‐distance migratory birds breeding in the Arctic face challenges as earlier snowmelt shifts the timing of vital resources. To keep up with these advancements, birds will need to modify their migration. Higher fuelling rates during stopover have been identified as a critical mechanism for accelerating migration, but this requires adequate food ...
Hailley Danielson‐Owczynsky, Allert I. Bijleveld, Ran Nathan, Sivan Toledo, Roeland A. Bom   +4 more
wiley   +1 more source