everyone for their reply.
Best Regards
Paulo Freitas
==============================================================
I used to work for the New England aquarium in Boston and I know they helped
develop some seal 'scarers' and I believe they may have some literature on
that subject. The number for the library is (617) 973-5237. The librarians
name is Dot Wensink and her email is [EMAIL PROTECTED]
I hope that they may be of some help.
Good luck in your research,
Sincerely,
Karen Lashenske
==============================================================
Not sure if you're interested in the effectiveness of these devices or in
potential side-effects on non-target species. The following studies have
investigated the effect of seal scarers on various marine mammal species:
· Morton, A.B., & Symonds, H.K. 2001: Displacement of Orcinus orca (L.)
by high
amplitude sound in British Columbia, Canada. ICES Journal of Marine Science
59(1):71-80
· Olesiuk, P.F., Nichol, L.M., Snowden, M.J., & Ford, J.K.B. 2002:
Effects of
the sound generated by an acoustic harassment device on the relative abundance
and distribution of harbor porpoises (Phocoena phocoena) in Retreat Passage,
British Columbia. Marine Mammal Science 18(4):843-862.
· Yurk, H. & Trites, A. W. 2000: Experimental attempts to reduce
predation by
harbor seals on out-migrating juvenile salmonids. Transactions of the American
Fisheries Society 129(6):1360-1366
Hope this helps.
Volker Deecke
==============================================================
A student of Jack Terhune <[EMAIL PROTECTED]> from the University of New
Brunswick did a report or paper on the use of seal scarers along the East
Coast of Canada. I cannot remember the name and a can't find the paper but
you could contact Terhune regarding the publication. I used AIRMAR devices
in a river to move seal away from a particular site. The paper is attached.
Good Luck with your work.
HaraldYurk
==============================================================
I have a paper on the impact of these devices on killer whales
Alexandra Morton
==============================================================
This reference might help.
Morton, A. B., and Symonds, H. K. 2002. Displacement of Orcinus orca
(L.) by high amplitude sound in British Columbia, Canada. ICES. J. Mar.
Sci. 59: 71-80
cheers, Andy
==============================================================
Johnston, D. W. 2002. The effect of acoustic harassment devices on harbour
porpoises (Phocoena phocoena) in the Bay of Fundy, Canada. Biological
Conservation
108, 113-118.
Culik BM, Koschinski S, Tregenza N, Ellis G (2000) Reactions of harbour
porpoises
(Phocoena phocoena) and herring (Clupea harengus) to acoustic alarms. Mar Ecol
Prog Ser 211: 255-260
<a href="http://fp.ecologic.free-online.co.uk/SNHADDReview.pdf";
rel="nofollow">http://fp.ecologic.free-online.co.uk/SNHADDReview.pdf</a>
Best,
Luke
==============================================================
Jacobs & Terhune 2002 The effectiveness of acoustic harassment
devices in the Bay of Fundy, Canada: seal reactions and a noise
exposure model. Aquatic Mammals 28: 147-158.
Terhune, Hoover & Jacobs. 2002 Potential detection and
deterrence ranges by harbor seals of underwater acoustic
harassment devices (AHD) in the Bay of Fundy, Canada. J. World
Aquaculture Soc. 33: 176-183
and references therein.
Regards, J. Terhune
==============================================================
This will give you a start. There are several more recent papers (Morton, A and
Symonds,H.K. 2001 ICES Journal and another by Olesiuk and Ford in either MMS or
Can. J. Zoology j
Jon Lien Ph.D.
==============================================================
Following your call for information on marine mammal scarers, I have come
across
a couple of references you may find helpful. The first is an NMFS report at
<a href="http://www.afsc.noaa.gov/Publications/ProcRpt/PR%202003-02.pdf";
rel="nofollow">http://www.afsc.noaa.gov/Publications/ProcRpt/PR%202003-02.pdf</a>
Loughborough Univ have worked on the project EPIC that was concerned with
marine
mammal scarers. They used to have link to their papers on-line but copyright
concerns have resulted in them removing the links. the point of contact was
Dave Goodson but he died a few weeks ago. Found one of them at Marine and
Freshwater Behaviour and Physiology 29(1-4): 211-236, 1997
The IWC Journal of Cetacean Research and Management have published some papers
on this subject over the last few years. A search using Google should find
them. Certainly Goodson was a leading author on this.
Hope you find this useful.
regards
Peter Ward
==============================================================
Paulo, we have given up on AHD's in British Columbia, Canada, and prohibited
them, as they proved to be quite ineffective at deterring seal attacks
(seals acclimatize to even the very powerful units) and we found they
displace other marine mammals such as harbor porpoise and whales. I've
attached one study on the latter.
Cheers,
Peter O.
==============================================================
I have been approached by salmon fishery owners about protecting their
fish. They have tried acoustic scarers and find they only work initially
until the predators get really hungry.
Joe Blue
Pres. Leviathan Legacy, Inc.
==============================================================
And thanks to Dr. Simon Northridge.
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