Results 61 to 70 of about 14,752 (205)

Semi‐automated seal detection on the Western Antarctic Peninsula: an unsupervised machine learning approach for detecting ice seals in aerial survey data

Remote Sensing in Ecology and Conservation, EarlyView.
This study presents a semi‐automated, rule‐based image analysis pipeline to detect ice seals in aerial surveys of the Western Antarctic Peninsula during an unusually low sea ice year. By using simple hierarchical clustering instead of deep learning, the method substantially reduced human annotation effort while achieving 82% recall, identifying 758 ...
Claire McGinnity, Connor C.G. Bamford, Nathan Fenney, Andrew Fleming, Jaume Forcada, Michael S. Tift, Luis A. Hückstädt, Daniel P. Costa, Peter T. Fretwell   +8 more
wiley   +1 more source

Explaining humpback whale’ distribution and abundance in the Magellan Strait, ChileZenodo

Global Ecology and Conservation
A new feeding ground for humpback whales was discovered in the Magellan Strait in 2003, which is critical habitat for a subpopulation of whales that migrate to these waters.
Catalina Sapag, Juan Capella, Yerko Vilina, Frank van Langevelde   +3 more
doaj   +1 more source

Estimates of humpback and minke whale entanglements in the Scottish static pot (creel) fishery

Endangered Species Research, 2022
Entanglement in static fishing gear (pots, or creels as they are called in Scottish fisheries) is a major cause of anthropogenic mortality and morbidity in large whales globally; in northeastern Atlantic waters around the coast of Scotland, entanglement ...
R Leaper, E MacLennan, A Brownlow, SV Calderan, K Dyke, PGH Evans, L Hartny-Mills, D Jarvis, L McWhinnie, A Philp, FL Read, KP Robinson, C Ryan   +12 more
doaj   +1 more source

The Truth About Soviet Whaling [PDF]

, 2008
I have always condemned (and to do anything more was not within our power or abilities) the illegal and sometimes destructive whaling by the Soviet Union.
Berzin, Alfred A.
core  

Modeling Skin Mark Temporal Variations to Estimate the Sex of Delphinids with Low Sexual Dimorphism: Implications for Management and Conservation

Integrative Zoology, EarlyView.
This work aimed to apply the principles of skin mark analysis to a cetacean species to build a sex‐discrimination model exclusively based on photographic material. Relevant differences between sexes emerged in markings, with males presenting more social, aggression‐related, and fishing‐related marks overall, and a stronger tendency of mark accumulation
Alice Turchi, Giulia Pedrazzi, Alex Mattiussi, Maria S. Labriola, Daniele Petrone, Sofia Rinalduzzi, Giancarlo Giacomini, Daniela Silvia Pace   +7 more
wiley   +1 more source

Predicting Historical Populations and Evaluating Shifting Baselines of Traditionally Exploited Fisheries

Fish and Fisheries, EarlyView.
ABSTRACT Development of data‐intensive stock assessment and ecosystem‐based models has improved our understanding of shifting species abundance in response to fishing, ocean ecology, and species interactions. Along with this analytical progress is evidence that many stocks lack data required for complex models, resulting in data‐limited options for ...
Allegra Ervin, Robert M. Cerrato, Adrian Jordaan, Michael G. Frisk   +3 more
wiley   +1 more source

Humpback whale migrations to Antarctic summer foraging grounds through the southwest Pacific Ocean

Scientific Reports, 2018
Humpback whale (Megaptera novaeangliae) populations typically undertake seasonal migrations, spending winters in low latitude breeding grounds and summers foraging in high latitude feeding grounds.
V. Andrews-Goff, S. Bestley, N. J. Gales, S. M. Laverick, D. Paton, A. M. Polanowski, N. T. Schmitt, M. C. Double   +7 more
doaj   +1 more source

The Greenland–Scotland Ridge in a Changing Ocean: Time to Act?

Marine Ecology, EarlyView.
ABSTRACT The Greenland–Scotland Ridge is a submarine mountain that rises up to 500 m below the sea surface and extends from the east coast of Greenland to the continental shelf of Iceland and across the Faroe Islands to Scotland. The ridge not only separates deeper ocean basins on either side, that is, the North Atlantic and Arctic oceans, but also ...
Christophe Pampoulie, Saskia Brix, Haseeb S. Randhawa   +2 more
wiley   +1 more source

Comparing the underwater soundscape of the Hawaiian Islands Humpback Whale National Marine Sanctuary and potential influences of the COVID-19 pandemic

Frontiers in Marine Science
Passive acoustic monitoring is an effective technique for long-term monitoring of the soundscape in marine protected areas. Ocean noise is a key concern for the U.S.
Brijonnay C. Madrigal, Anke Kügler, Anke Kügler, Eden J. Zang, Marc O. Lammers, Leila T. Hatch, Aude F. Pacini   +6 more
doaj   +1 more source

Humpback whales feed on hatchery-released juvenile salmon [PDF]

Royal Society Open Science, 2017
Humpback whales are remarkable for the behavioural plasticity of their feeding tactics and the diversity of their diets. Within the last decade at hatchery release sites in Southeast Alaska, humpback whales have begun exploiting juvenile salmon, a ...
Ellen M. Chenoweth, Janice M. Straley, Megan V. McPhee, Shannon Atkinson, Steve Reifenstuhl   +4 more
doaj   +1 more source