Research Program on the Sea Otter (Enhydra Lutris) and Its Environment PDF Download
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Author:
Publisher:
ISBN:
Category : Sea otter
Languages : en
Pages : 56
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Book Description
Author:
Publisher:
ISBN:
Category : Sea otter
Languages : en
Pages : 56
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Book Description
Author: Marianne Riedman
Publisher:
ISBN:
Category : Enhydra
Languages : en
Pages : 136
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Book Description
Author: Leah Darshan Honka
Publisher:
ISBN:
Category :
Languages : en
Pages : 44
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Book Description
As preferred prey become scarce, theory suggests that predator per-capita consumption rates decline and predator diets diversify. As a keystone predator, sea otters (Enhydra lutris) are known to have remarkable impacts on their macroinvertebrate prey, however, variation in the magnitude of these effects through time remain less well known. Using a space-for-time substitution, we quantified sea otter foraging behaviour at 5 rocky reef sites that fell along a gradient in otter occupation time (0.1-33 years) on British Columbia, Canada's central coast. As site occupation time increased, sea otters targeted increasingly smaller, more diverse macroinvertebrate prey suggesting the serial depletion of preferred to less valuable prey. We found strong evidence that urchin density and occupation time were important drivers of sea otter per-capita consumption rates on urchins, strongly interacting rocky reef herbivores, well known to drive the distribution and abundance of kelps. In addition, there was greater strength of evidence for prey-dependent over predator-dependent functional response models of sea otter consumption of urchins. These results have implications for nearshore productivity, commercial and subsistence shellfish fisheries and balancing the trade-offs inherent to ecosystem-based management.
Author: Charles D. Woodhouse
Publisher:
ISBN:
Category : Sea otter
Languages : en
Pages : 86
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Author: Marianne Riedman
Publisher:
ISBN:
Category : Enhydra
Languages : en
Pages : 136
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Book Description
A current review of the biology, ecology, and behavior of the sea otter (Enhydra lutris). Emphasis is placed on the populations and habitat in central California but results of studies in Alaska, Canada, and the Soviet Union are also covered. Management and conservation problems such as conflicts with shellfisheries and concerns about oil pollution are also touched on.
Author: Douglas P. DeMaster
Publisher:
ISBN:
Category :
Languages : en
Pages : 192
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Author:
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Category : Endangered species
Languages : en
Pages : 184
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Author:
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ISBN:
Category : Animal introduction
Languages : en
Pages : 182
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Book Description
Author: Sea Otter Recovery Team
Publisher:
ISBN: 9780662475279
Category : Sea otter
Languages : en
Pages : 68
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Book Description
Author: Joseph R. Geraci
Publisher: National Aquarium in Baltimore
ISBN: 0977460908
Category : Marine mammals
Languages : en
Pages : 386
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Book Description
Comprehensive manual for understanding and carrying out marine mammal rescue activities for stranded seals, manatees, dolphins, whales, or sea otters.
