Results 31 to 40 of about 92,063 (238)

Utilisation of intensive foraging zones by female Australian fur seals. [PDF]

open access: yes, 2015
Within a heterogeneous environment, animals must efficiently locate and utilise foraging patches. One way animals can achieve this is by increasing residency times in areas where foraging success is highest (area-restricted search).
Arnould, John PY   +3 more
core   +9 more sources

Osteofluorosis in free ranging California sea lions (Zalophus californianus)

open access: yesFrontiers in Marine Science, 2023
We report the first case series of osteofluorosis in free ranging marine mammals and documentation of baseline bone fluoride concentrations in this population; however, the exact source is not known.
Margaret E. Martinez   +6 more
doaj   +1 more source

Quantifying the linkages between California sea lion (Zalophus californianus) strandings and particulate domoic acid concentrations at piers across Southern California

open access: yesFrontiers in Marine Science, 2023
Domoic acid-producing blooms of the diatom genus Pseudo-nitzschia are pervasive in coastal environments globally. Domoic acid, a neurotoxin, accumulates via trophic transfer into marine food webs and is often associated with mass marine mammal mortality ...
Jayme Smith   +5 more
doaj   +1 more source

Four seasons abundance changes of Zalophus californianus californianus (Lesson 1828), Allen, 1880, in the Gulf of California, Mexico

open access: yesBrazilian Archives of Biology and Technology, 2006
This paper describes for the first time the relative abundance, population structure and numeric variation of California sea lions in the Gulf of California, Mexico, during four different seasons.
M. Octavio Maravilla-Chávez   +2 more
doaj   +1 more source

The curious case of the missing face: Death of California sea lion by Dungeness crab trap

open access: yesInternational Journal of Aquatic Biology, 2018
Marine mammals frequently interact with human detritus due to their proximity to shores and shared target foods. Sea lions have been known to attempt to obtain bait inside crab traps.
Rif S. El-Mallakh, Michael Hartman
doaj   +1 more source

Comment on “Temporal and spatial variation in harbor seal (Phoca vitulina L.) roar calls from southern Scandinavia” [J. Acoust. Soc. Am. 141, 1824-1834 (2017)] [PDF]

open access: yes, 2018
In their recent article, Sabinsky and colleagues investigated heterogeneity in harbor seals' vocalizations. The authors found seasonal and geographical variation in acoustic parameters, warning readers that recording conditions might account for some of ...
Ravignani, A.
core   +2 more sources

Characterization of the Temporomandibular Joint of Southern Sea Otters (Enhydra lutris nereis). [PDF]

open access: yes, 2015
The structure-function relationship of the temporomandibular joint (TMJ) of southern sea otter has largely not been described. This study aims to describe the histological, biochemical, and biomechanical features of the TMJ disk in the southern sea otter.
Arzi, Boaz   +5 more
core   +2 more sources

Seals, Sea Lions, and Walruses [PDF]

open access: yes
A classroom resource for K-3 lessons on these pinnipeds. Guide is complete with background materials (for students and teacher), goals and objectives, a glossary, 10 classroom activities, and a bibliography for obtaining additional resources.

core   +4 more sources

The planktonic food web in the Gulf of Naples based on the analysis of carbon and nitrogen stable isotope ratios

open access: yesMarine Ecology, EarlyView., 2023
Abstract Plankton play a key role in marine food webs by producing and transferring organic matter and energy to higher trophic levels. To define the trophic structure and interactions within the planktonic communities in the Gulf of Naples, we determined carbon and nitrogen stable isotope ratios in particulate organic matter (POM, <20 μm ...
Louise Merquiol   +2 more
wiley   +1 more source

Human Impacts on Seals, Sea Lions, and Sea Otters: Integrating Archaeology and Ecology of the Northeast Pacific

open access: yesEthnobiology Letters, 2013
Review of Human Impacts on Seals, Sea Lions, and Sea Otters: Integrating Archaeology and Ecology of the Northeast Pacific. Todd J. Braje and Torben C. Rick, editors. 2011. University of California Press, Berkeley. Pp. 328. $65.00 (hardcover).
Ray Pierotti
doaj   +1 more source

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