Archived posting to the Leica Users Group, 2008/10/15

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Subject: [Leica] IMG story: Kokanee Slamon
From: wildlightphoto at earthlink.net (wildlightphoto@earthlink.net)
Date: Wed Oct 15 19:08:51 2008

Lake Tahoe's Kokanee Salmon live their entire lives in fresh water, hatching 
in tributary streams and maturing in the lake itself, returning to the 
streams to spawn.  This is a small salmon, about the size of a trout.  Lake 
Tahoe's Taylor Creek is one of the best places to witness the beginning and 
end of the salmon's life cycle:

http://www.wildlightphoto.com/fish/salmon/L1110272.jpg

The salmon pair up in shallow gravelly areas, where the female excavates a 
redd (a place to lay the eggs) in the stream bottom by using the suction 
from the upward thrust of her tail to dislodge gravel and silt, where it is 
carried away by the current.  The male is brighter red; aside from 
fertilizing the eggs his role is to defend the female's redd from intruders:

http://www.wildlightphoto.com/fish/salmon/L1110373.jpg
http://www.wildlightphoto.com/fish/salmon/L1110366.jpg

Among the dangers they face are the many Common Mergansers, attracted by the 
fish concentrations:

http://www.wildlightphoto.com/fish/salmon/L1110265.jpg

The mergansers pursue the salmon under water and use their serrated bills to 
hold the salmon before swallowing it whole:

http://www.wildlightphoto.com/fish/salmon/L1110292.jpg
http://www.wildlightphoto.com/fish/salmon/L1110261.jpg
http://www.wildlightphoto.com/fish/salmon/L1110262.jpg

However the pursuit isn't over just yet.  Other mergansers are interested in 
discussing rightful ownership of the meal.  Apparently the salmon have 
little say in the matter:

http://www.wildlightphoto.com/fish/salmon/L1110343.jpg
http://www.wildlightphoto.com/fish/salmon/L1110334.jpg
http://www.wildlightphoto.com/fish/salmon/L1110335.jpg

The most successful mergansers are those who can swallow the salmon on the 
run.

Technical stuff: R8/DMR @ ISO 400, lens was either 180mm APO-Elmarit-R or 
560mm f/6.8 Telyt

All comments welcome.

Doug Herr
Birdman of Sacramento
http://www.wildlightphoto.com



Replies: Reply from luisripoll at telefonica.net (Lluis Ripoll) ([Leica] IMG story: Kokanee Slamon)
Reply from imagist3 at mac.com (Lottermoser George) ([Leica] IMG story: Kokanee Slamon)
Reply from r.s.taylor_post at comcast.net (Richard S. Taylor) ([Leica] IMG story: Kokanee Slamon)
Reply from stasys1 at cox.net (Stasys Petravicius) ([Leica] IMG story: Kokanee Slamon)