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Subject: Re: Energetics of Fish Jumping
From: Thomas Hurst <[log in to unmask]>
Reply-To:Scientific forum on fish and fisheries <[log in to unmask]>
Date:Wed, 3 Apr 2002 14:51:58 -0800

text/plain (69 lines)


I remember seeing a presentation on the energy expended by jumping
arrowana.  The presentation was at the 1996 ASIH meeting, but I haven't
seen any papers resulting from it.  The authors were Korff, Suter, and Long
from Vassar College.  You could try tracking them down, they might have
some ideas.

Good luck.


At 4/3/2002, Randy E Edwards wrote:
>Fellow fish scientists,
>I am going to try one more time, not having much success or response to my
>last question to the forum (more on that later).
>This is a new issue/question.  Does anyone have any information or leads to
>information that could be used to estimate the energetics/energy cost of
>fish jumping?  A rough estimate could be obtained from knowledge of burst
>swimming, because a fish has to attain velocity that will propel it a
>certain distance above the water.  However, I have not been able to find
>literature on that either.
>The issue can be posed another way.  The potential energy (PE) change
>associated with a fish reaching a height (say, center of mass reaching some
>number of body lengths above the water) is easy to calculate.  The question
>is:  What is the ratio of PE to the actual kinetic energy expended to
>overcome friction and other losses (e.g., inefficiency of tail thrust
>during acceleration  = "cavitation")?  Does a fish have to expend 5X , or
>10 X, or 20 X the  PE change in order to jump?  Perhaps someone can offer
>"estimates" based on fluid dynamics considerations.
>All suggestions will be greatly appreciated,
>Randy E. Edwards, Ph.D.
>Research Fish Ecologist
>USGS-BRD-FCSC/Univ. of South Florida College of Marine Science
>Center For Coastal & Regional Marine Studies
>600 Fourth Street South
>St. Petersburg, FL 33701-4846
>Phone:  727/803-8747 (x3069)
>FAX: 727/803-2031
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Thomas P. Hurst
Behavioral Ecology Branch
Alaska Fisheries Science Center
Hatfield Marine Science Center
Newport, OR 97365
541-867-0222 office
541-867-0136 fax
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