Diving of Otters (Lutra lutra) in a Marine Habitat: Use of Depths by a Single-Prey Loader

10.2307/5479 ◽  
1993 ◽  
Vol 62 (1) ◽  
pp. 22 ◽  
Author(s):  
Bart A. Nolet ◽  
Dennis E. H. Wansink ◽  
Hans Kruuk
Keyword(s):  
Habitat Use ◽  
Lutra Lutra ◽  
Marine Habitat

Seasonal variation in coastal marine habitat use by the European shag: Insights from fine scale habitat selection modeling and diet

2017 ◽  
Vol 141 ◽  
pp. 224-236 ◽  
Author(s):  
Candice Michelot ◽  
David Pinaud ◽  
Matthieu Fortin ◽  
Philippe Maes ◽  
Benjamin Callard ◽  
...  
Keyword(s):  
Seasonal Variation ◽  
Habitat Selection ◽  
Habitat Use ◽  
Fine Scale ◽  
Marine Habitat ◽  
Coastal Marine

scholarly journals Vulnerability of a Top Marine Predator in One of the World’s Most Impacted Marine Environments (Arabian Gulf)

2021 ◽  
Author(s):  
Bruno Diaz Lopez ◽  
Séverine Methion ◽  
Himansu Das ◽  
Ibrahim Bugla ◽  
Maitha Al Hameli ◽  
...  
Keyword(s):  
Habitat Use ◽  
Bottlenose Dolphin ◽  
Prey Availability ◽  
Arabian Gulf ◽  
Marine Environments ◽  
Marine Habitat ◽  
Predator Species ◽  
Marine Predator ◽  
Conservation Measures ◽  
Abundance Estimates

Abstract Knowledge of the habitat use of wildlife in highly impacted areas is essential to identify areas of biological importance and to implement appropriate conservation measures. The Arabian Gulf represents one of the most extreme marine environments and is considered one of the regions in the world with the greatest anthropogenic impact. Information on the habitat use and abundance of marine top predator species is however lacking, despite being a prerequisite for effective planning of conservation measures. Here, we provide novel information for the Indo-Pacific bottlenose dolphin (Tursiops aduncus) in the Arabian Gulf (Abu Dhabi, United Arab Emirates). Data from 80 daily surveys conducted between June 2014 and November 2019 were used both to assess correlates of bottlenose dolphin habitat use and relative density and to calculate mark-recapture abundance estimates. This study confirms the strong adaptability and tolerance of this top marine predator to extreme environmental conditions within a highly heterogeneous and impacted marine habitat. The observed preferences for areas with less human pressure were likely a result of the interactions of environmental factors with prey availability and human disturbance. This study also provides the first abundance estimates for a bottlenose dolphin population in the Arabian Gulf. Our findings support the call for increased marine protected areas and the creation of transboundary conservation areas in the region. Regional connectivity should be of value to marine predators whose wide distribution and vulnerability to human activities means that alteration of their habitats can result in population declines and eventual local or regional extinctions.

Foraging destinations and marine habitat use of short-tailed albatrosses: A multi-scale approach using first-passage time analysis

2006 ◽  
Vol 53 (3-4) ◽  
pp. 370-386 ◽  
Author(s):  
Robert M. Suryan ◽  
Fumio Sato ◽  
Gregory R. Balogh ◽  
K. David Hyrenbach ◽  
Paul R. Sievert ◽  
...  
Keyword(s):  
Habitat Use ◽  
First Passage Time ◽  
Passage Time ◽  
Time Analysis ◽  
Marine Habitat ◽  
First Passage ◽  
Multi Scale

scholarly journals Strontium isotopes reveal diverse life history variations, migration patterns, and habitat use for Broad Whitefish (Coregonus nasus) in Arctic, Alaska

2021 ◽  
Author(s):  
Jason C. Leppi ◽  
Daniel J. Rinella ◽  
Mark S. Wipfli ◽  
Randy J. Brown ◽  
Karen J. Spaleta ◽  
...  
Keyword(s):  
Life History ◽  
Habitat Use ◽  
Life Histories ◽  
Anthropogenic Impacts ◽  
Indigenous Communities ◽  
Life History Strategies ◽  
Time And Space ◽  
Marine Habitat ◽  
Migration Patterns ◽  
Arctic Alaska

Conservation of Arctic fish species is challenging partly due to our limited ability to track fish through time and space, which constrains our understanding of life history diversity and lifelong habitat use. Broad Whitefish ( Coregonus nasus ) is an important subsistence species for Alaska’s Arctic Indigenous communities, yet little is known about life history diversity, migration patterns, and freshwater habitat use. Using laser ablation Sr isotope otolith microchemistry, we analyzed Colville River Broad Whitefish 87 Sr/ 86 Sr chronologies (n = 61) to reconstruct movements and habitat use across the lives of individual fish. We found evidence of at least six life history types, including three anadromous types, one semi-anadromous type, and two nonanadromous types. Anadromous life history types comprised a large proportion of individuals sampled (collectively, 59%) and most of these (59%) migrated to sea between ages 0–2 and spent varying durations at sea. The semi-anadromous life history type comprised 28% of samples and entered marine habitat as larvae. Nonanadromous life history types comprised the remainder (collectively, 13%). Otolith 87 Sr/ 86 Sr data from juvenile and adult freshwater stages suggest that habitat use changed in association with age, seasons, and life history strategies. This information on Broad Whitefish life histories and habitat use across time and space will help managers and conservation planners better understand the risks of anthropogenic impacts and help conserve this vital subsistence resource.

Spacing and foraging of otters (Lutra lutra) in a marine habitat

2009 ◽  
Vol 185 (2) ◽  
pp. 205-212 ◽  
Author(s):  
Hans Kruuk ◽  
Raymond Hewson
Keyword(s):  
Lutra Lutra ◽  
Marine Habitat

scholarly journals Marine habitat use and feeding ecology of introduced anadromous brown trout at the colonization front of the sub-Antarctic Kerguelen archipelago

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Jan Grimsrud Davidsen ◽  
Xavier Bordeleau ◽  
Sindre Håvarstein Eldøy ◽  
Frederick Whoriskey ◽  
Michael Power ◽  
...  
Keyword(s):  
Habitat Use ◽  
Brown Trout ◽  
Foraging Ecology ◽  
Good Condition ◽  
Stomach Contents ◽  
Suitable Habitat ◽  
Marine Habitat ◽  
Resource Needs ◽  
One Year ◽  
Kerguelen Archipelago

AbstractIn 1954, brown trout were introduced to the Kerguelen archipelago (49°S, 70°E), a pristine, sub-Antarctic environment previously devoid of native freshwater fishes. Trout began spreading rapidly via coastal waters to colonize adjacent watersheds, however, recent and unexpectedly the spread has slowed. To better understand the ecology of the brown trout here, and why their expansion has slowed, we documented the marine habitat use, foraging ecology, and environmental conditions experienced over one year by 50 acoustically tagged individuals at the colonization front. Trout mainly utilized the marine habitat proximate to their tagging site, ranging no further than 7 km and not entering any uncolonized watersheds. Nutritional indicators showed that trout were in good condition at the time of tagging. Stomach contents and isotope signatures in muscle of additional trout revealed a diet of amphipods (68%), fish (23%), isopods (6%), and zooplankton (6%). The small migration distances observed, presence of suitable habitat, and rich local foraging opportunities suggest that trout can achieve their resource needs close to their home rivers. This may explain why the expansion of brown trout at Kerguelen has slowed.

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