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Subject: Re: FISH-SCI Digest - 23 Apr 2008 to 24 Apr 2008 (#2008-61)
From: Les Kaufman <[log in to unmask]>
Reply-To:Scientific forum on fish and fisheries <[log in to unmask]>
Date:Thu, 24 Apr 2008 16:52:52 -0700
Content-Type:text/plain
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Re: Dick's comments, have to wonder if this sensible approach could  
actually reduce lobster yield by drastically cutting back on the  
volume of the bait buffet being set out in order to maintain the 86%  
discard rate!

Just making trouble...

Les


Les Kaufman
Professor of Biology
Boston University Marine Program
and
Senior PI
Marine Management Area Science
Conservation International

“I know the human being and fish can coexist peacefully.”
George W. Bush
Saginaw, Michigan; September 29, 2000



On Apr 24, 2008, at 3:00 PM, FISH-SCI automatic digest system wrote:

> There are 2 messages totalling 229 lines in this issue.
>
> Topics of the day:
>
>   1. Fishing Throws Targeted Species Off Balance
>   2. Ichthyology,  Fisheries, Aquaculture - New Specialist Books,  
> April 2008
>
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>
> ----------------------------------------------------------------------
>
> Date:    Wed, 23 Apr 2008 18:07:45 -0400
> From:    Richard Allen <[log in to unmask]>
> Subject: Re: Fishing Throws Targeted Species Off Balance
>
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>
> Following a similar line of reasoning as that expressed by Trevor with
> regard to "spawning at least once," I would question the need to
> avoid fishing during the breeding season.  Unless fishing broadly  
> disrupts
> spawning by individuals other than those that are caught, spawning  
> should be
> adequate if the spawning biomass that gets to spawn is adequate.
>
> These myths lead to regulations that create waste of harvesting  
> resources
> that are increasingly hard to justify.  For example, rules that  
> require the
> discarding of egg-bearing lobsters have no biological justification  
> other
> than to reduce the fishing mortality rate, which could be  
> accomplished with
> direct controls on total harvest.  Almost every female lobster that is
> landed is bearing eggs internally, which is legal.  Total egg  
> production
> would not be adversely affected if lobsters with external eggs were  
> landed
> and there were a cap on harvest that caused females without  
> external eggs to
> be left in the water to bear their eggs and reproduce.
>
> This absurdity is exacerbated by the prohibition on taking "V-notch"
> lobsters, which are females that have been marked with a notch in  
> their tail
> flipper to protect them from harvest.  This "torture and release"  
> program is
> another example of a popular regulation that is wasteful of total  
> resource
> use.
>
> With an 86% discard rate in the Rhode Island lobster trap fishery  
> in 2006,
> we need to think about the waste of fuel, bait, labor, etc  
> associated with
> the use of regulations that allow fishermen to catch too many  
> animals, but
> require them to throw most of those animals back.  Better to simply  
> keep
> what is caught and stop fishing when the allowable take has been  
> landed,
> taking into account the size distribution of the population and the  
> catch
> for purposes of yield per recruit, fecundity, and the need to  
> maintain an
> adequate biomass to get long-lived species through a period of low
> reproductive success.
>
> Dick Allen
> www.LobsterConservation.com
>
> -----Original Message-----
> From: Scientific forum on fish and fisheries
> [mailto:[log in to unmask]] On Behalf Of Pranaya Parida
> Sent: Wednesday, April 23, 2008 12:02 AM
> To: [log in to unmask]
> Subject: Re: Fishing Throws Targeted Species Off Balance
>
>> <> ><> ><> ><> ><> ><> ><> ><> ><> ><> ><> ><> ><> ><> ><> ><>
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>
> Dear friends,
>
>
>
> It's a good discussion whether the younger ones to be spared or the  
> older
> ones to be spared during fishing.
>
>
>
> But the ethics/principle is neither there should be any recruitment  
> over
> fishing nor the growth over fishing.
>
>
>
> To control the growth over fishing: we have to spare the younger ones
>
> To control the recruitment over fishing: we have to spare the older  
> ones
>
>
>
> Another principle/ethics in fisheries management is " we should give a
> chance to individuals to breed at least once in their life time."
>
>
>
> For the stock assessment for fisheries management the calculation  
> of the
> Length at maturity (Lm50), generally helps the fisheries scientist  
> to decide
> the minimum size of the species to be caught.
>
>
>
> No fish less than Lm50 should be caught for the fisheries management
> purpose.
>
>
>
> Again we should not catch the broods or there should not be any  
> fishing
> during the breeding seasons so that there should proper recruitment  
> in the
> ecosystem.
>
>
>
> Thanking you for these discussions.
>
>
>
> Kindly provide your valuable suggestion on my comments.
>
>
>
> With best wishes,
>
>
>
>
> -- 
> *Dr. Pranaya Kumar Parida
> Fisheries Specialist
> AFPRO
> Bhubaneswar
> Orissa, INDIA
> +91-9437471364*
>
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>
> ------------------------------
>
> Date:    Thu, 24 Apr 2008 08:46:56 +0100
> From:    Steven Simpson Books <[log in to unmask]>
> Subject: Ichthyology,  Fisheries, Aquaculture - New Specialist  
> Books, April 2008
>
>> <> ><> ><> ><> ><> ><> ><> ><> ><> ><> ><> ><> ><> ><> ><> ><>
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>
> Steven Simpson Books
> Specialist Booksellers & Publishers' Distributor (Est.1986)
>
> Office tel. 01-953-850-471, overseas tel. +441-953-850-471
>
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>
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>
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>
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>
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> http://www.stevensimpsonbooks.com/si/978572.html
>
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>
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>
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>
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>
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>
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>
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>
>
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>
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>
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>
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> Order online : please visit our webshop www.stevensimpsonbooks.com
>
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>
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>
> ------------------------------
>
> End of FISH-SCI Digest - 23 Apr 2008 to 24 Apr 2008 (#2008-61)
> **************************************************************
>


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