Results 11 to 20 of about 196,517 (325)

Intrapopulation differences in polar bear movement and step selection patterns

Movement Ecology, 2022
Background The spatial ecology of individuals often varies within a population or species. Identifying how individuals in different classes interact with their environment can lead to a better understanding of population responses to human activities and
Ryan R. Wilson, Michelle St. Martin, Eric V. Regehr, Karyn D. Rode   +3 more
doaj   +1 more source

Long-Term Stability in the Trophic Ecology of a Pelagic Forager Living in a Changing Marine Ecosystem

Frontiers in Marine Science, 2020
Natural or human-induced environmental changes can modify the structure of ecological communities and thus alter food web interactions. After the collapse of hake stocks (Merluccius hubbsi) provoked by fisheries over the Patagonian shelf in 1997 profound
Damián G. Vales, Luis Cardona, Rocío Loizaga, Néstor A. García, Enrique A. Crespo   +4 more
doaj   +1 more source

Toxoplasma gondii Genetic Diversity in Mediterranean Dolphins

Pathogens, 2022
Toxoplasma gondii constitutes a major zoonotic agent but also has been frequently identified as an important cause of clinical disease (e.g., abortion, pneumonia, encephalitis) in wildlife; specifically, T.
Mercedes Fernández-Escobar, Federica Giorda, Virgina Mattioda, Tania Audino, Fabio Di Nocera, Giuseppe Lucifora, Katia Varello, Carla Grattarola, Luis Miguel Ortega-Mora, Cristina Casalone, Rafael Calero-Bernal   +10 more
doaj   +1 more source

Age‐associated variation in the gut microbiota of chinstrap penguins (Pygoscelis antarctica) reveals differences in food metabolism

MicrobiologyOpen, 2021
Age is known to affect the gut microbiota in various animals; however, this relationship is poorly understood in seabirds. We investigated the temporal succession of gut microbiota in captive chinstrap penguins of different ages using high‐throughput ...
Jiashen Tian, Jing Du, Shengjiu Zhang, Yanqiu Li, Xianggang Gao, Jiabo Han, Zhichuang Lu   +6 more
doaj   +1 more source

Age and sex differences in in-air vocalization characteristics of spotted seal pups from newborn to 1 year old in captivity

Frontiers in Marine Science, 2022
Acoustic parameters of spotted seals (Phoca largha), including the duration, peak frequency, and peak-to-peak source level, are reported to vary between different ages and sexes; however, to our knowledge, the vocal ontogeny of the spotted seal from ...
Peijun Zhang, Peijun Zhang, Liangliang Yang, Jiabo Han, Yong Yang, Zhichuang Lu, Songhai Li   +6 more
doaj   +1 more source

Electrocardiographic Scaling Reveals Differences in Electrocardiogram Interval Durations Between Marine and Terrestrial Mammals

Frontiers in Physiology, 2021
Although the ability of marine mammals to lower heart rates for extended periods when diving is well documented, it is unclear whether marine mammals have electrophysiological adaptations that extend beyond overall bradycardia.
Rhea L. Storlund, Rhea L. Storlund, David A. S. Rosen, David A. S. Rosen, Andrew W. Trites, Andrew W. Trites   +5 more
doaj   +1 more source

Distribution of microbiota across different intestinal tract segments of a stranded dwarf minke whale, Balaenoptera acutorostrata

MicrobiologyOpen, 2020
Marine mammals are an important part of ocean ecosystems, of which, whales play a vital role in the marine food chain. In this study, the mucosa and contents from different intestinal tract segments (ITSs) of a stranded dwarf minke whale (Balaenoptera ...
Jiashen Tian, Jing Du, Zhichuang Lu, Jiabo Han, Zhen Wang, Duohui Li, Xiaoyan Guan, Zhaohui Wang   +7 more
doaj   +1 more source

Breaking down “harassment” to characterize trends in human interaction cases in Maine's pinnipeds

Conservation Science and Practice, 2021
Recent marine mammal recovery and growth of human populations in coastal areas has led to increased human harassment of protected pinniped populations. Yet, current monitoring approaches lack the necessary resolution to describe this emerging issue.
Emma Newcomb, Dominique Walk, Holland Haverkamp, Lynda Doughty, Sean Todd, Rosemary Seton, Lindsey Jones, Kristina Cammen   +7 more
doaj   +1 more source

Divergent Gene Expression Profiles in Alaskan Sea Otters: An Indicator of Chronic Domoic Acid Exposure?

Oceans, 2022
An opportunistic investigation into ecosystem instability in Kachemak Bay (KBay), Alaska, has led us to investigate exposure to toxic algae in sea otters.
Lizabeth Bowen, Susan Knowles, Kathi Lefebvre, Michelle St. Martin, Michael Murray, Kim Kloecker, Daniel Monson, Benjamin Weitzman, Brenda Ballachey, Heather Coletti, Shannon Waters, Caroline Cummings   +11 more
doaj   +1 more source

Marine mammal impacts in exploited ecosystems: would large scale culling benefit fisheries? [PDF]

PLoS ONE, 2012
Competition between marine mammals and fisheries for marine resources-whether real or perceived-has become a major issue for several countries and in international fora.
Lyne Morissette, Villy Christensen, Daniel Pauly   +2 more
doaj   +1 more source