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FLMNH-ASPIDOLIST-L  October 2012

FLMNH-ASPIDOLIST-L October 2012

Subject:

Re: Fwd: Vicious Predators

From:

[log in to unmask]

Reply-To:

flmnh-aspidolist <[log in to unmask]>

Date:

Wed, 3 Oct 2012 12:24:23 +1000

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Hi Scott

I never wold have thought of that

thanks


Maria

Quoting Smiley Work <[log in to unmask]>:

> University of Alaska Fairbanks
> Juneau Center, School of Fisheries and Ocean Sciences
>
> SEMINAR NOTICE
>
> Impacts of sea otter predation on commercially important sea  
> cucumbers (Parastichopus californicus) in Southeast Alaska
>
>
> Sean Larson
> MS Fisheries Candidate
> Juneau Center, School of Fisheries and Ocean Sciences
> Advisor: Dr. Ginny Eckert
>
> Friday, October 5, 2012
> 9:00 a.m.
>
> Presenter - Juneau -UAF Lena Point Fisheries Building, room 101
> Fairbanks - O'Neill, Room 214
> Kodiak - Owen, Room 219
>
>
>
>
> Abstract
> Sea cucumbers (/Parastichopus californicus/), which are an important  
> commercial, subsistence and ecological resource, are negatively  
> impacted by an expanding sea otter (/Enhydra lutris/) population in  
> Southeast Alaska.  Sea otters were reintroduced into Southeast  
> Alaska in the 1960s after their demise in the 18th and 19th century  
> fur trade; in the ensuing decades, the otter population grew, and  
> sea cucumber biomass declined.  This study evaluates the interaction  
> and impacts of sea otters on sea cucumbers using sea cucumber  
> foraging observations and survey data and sea cucumber density data  
> collected for fishery management.  Sea cucumbers represented about  
> 5% of the sea otter diet.  Declines in sea cucumber density ranged  
> from 26 to 100% in areas with sea otters and were most severe within  
> areas with high sea otter use.  Sea cucumber density was lower in  
> areas sea otters inhabited longer.  The impact of sea otters should  
> be included in sea cucumber fishery management as a step toward  
> ecosystem based management and to ensure resource viability over the  
> long term.
>
>



Dr Maria Byrne
Professor Marine and Developmental Biology
Deputy Director One Tree Island Research Station
Schools of Medical and Biological Sciences
University of Sydney
pH 61-2-9351-5167
FAX 61-2-9351-2813
[log in to unmask]
http://sydney.edu.au/medicine/anatomy/research/labs/byrne/projects/index.php


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