Dear Yves

I saw it in Worms too. Just assumed it had been done


On 10/2/12 11:11 PM, Yves Samyn wrote:
[log in to unmask]" type="cite"> RE: Fwd: Vicious Predators

Hello Scott and Maria,


Very interesting indeed.


By the way, has the shift of P. californicus to Apostichopus been formally published (I see it's in WoRMS), and if yes what's the reference?


Enjoy your retirement Scott!


Best wishes,


-----Original message-----
From: Smiley Work <[log in to unmask]>
Sent: Wed 03-10-2012 05:27
Subject: Re: Fwd: Vicious Predators
To: [log in to unmask];
Dear Maria

The story here in Kodiak was that there were no Parastichopus
californicus (read Apostichopus californicus) in Kodiak when I was first
here in 1974 due to their predation by King Crab (Paralithodes
camtschaticus) - and that the north-eastern biogeographical province
boundary for A. californicus at the end of the Kenai peninsula was due
to the presence of  King Crabs - kind of neat thing - biogeographical
province boundaries set by predators. Turned out that the most common
item in King Crab stomachs in Kodiak during that era was echinoderm
parts, most common being vertebrae from ophiuroids! Now with this info
on otters we have another predator to worry about - not to mention -
given the violent cycling of otter populations as they overgrow their
food base - the incredible dynamics of near shore communities over the
time scale of a human life. PS. I managed to retire from the University
of Alaska and am having a blast indulging all those fascinations I set
aside when work deadlines loomed.


On 10/2/12 6:24 PM, [log in to unmask] wrote:
> 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
>> 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]
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