Salmon even more harmful that originally thought - Fly Fishing Forum
Our Environment We are stewards of wild places

Thread Tools Search this Thread Rate Thread Display Modes
Old 06-05-2003, 08:02 AM
Dble Haul's Avatar
Dble Haul Dble Haul is offline
Fly chucker
Join Date: Aug 2001
Location: New England
Posts: 3,674
Salmon even more harmful that originally thought

Nothing new here....this is a perspective from Europe.....

Farmed salmon pose greater risk to wild species than thought
Wed Jun 4, 2:40 PM ET

PARIS (AFP) - Farmed salmon are a bigger risk to wild species than previously thought, according to a study which says young captive fish that escape their pens beat their native counterparts at the mating game.

Salmon farms are a thriving industry in Canada, Chile, Ireland, Norway and Scotland but biologists have long feared that the native gene pool could be destroyed if too many penned fish escape their confinement and inter-breed with wild fish.

Until now, those fears have been dampened by findings that escapees are less successful at reproducing than native fish.

But a new study says the picture is more complex, the British weekly New Scientist reports in its forthcoming June 7 issue.

Farmed salmon may be less fertile than wild fish but young males among them more than make up for it. Their early sexual maturity and aggressiveness enables them to sneak in front of larger wild fish to fertilise the female's eggs.

Experiments conducted on farmed, wild and hybrid species of Norwegian salmon by Oxford University scientist Dany Garant and colleagues found that farmed yearlings were four times as successful as wild ones at fertilising eggs.

Even the hybrids were twice as good at it as their wild rivals.

Given the faster life cycles of farmed salmon, these young fish could very quickly spread their genes through wild populations, says Garant's study, published in a specialist journal, Ecology Letters.

William Muir, an expert on farmed and transgenic fish at Purdue University in the US state of Indiana, told New Scientist that the study shed "incredibly important" light on the dilemma of farmed fish.

"(Escapees) could swamp the gene pools with maladapted genes and quickly cause extinction of wild fish," he warned.

Seven countries that have big salmon farming industries signed an agreement in 1994 aimed at minimising the impact of fish farming in the North Atlantic.

But the measures set out in the accord are only voluntary guidelines and do not hold countries accountable for damage wrought by escaped fish.

Escapees are a major problem, said Garant. "In Norway, some rivers are completely invaded by farmed fish."
Reply With Quote Quick reply to this message
Old 06-05-2003, 10:00 AM
Moonlight Moonlight is offline
Registered User
Join Date: Jan 2002
Location: North West
Posts: 884
Always amazed...

The information that continues to surface regarding Aquaculture is so compeleing that I am begining to think it may be curtailed in the not to distant future. It will be a struggle but now it is being ratcheted up by many great studies that bolster all the antecdotal information that Conservation and Fshing organizations have been working with for the last 20 years.
The recent report on the health of the worlds oceans by "The Pew Commission" calls for stricter controls and cites escalating extraction of fish for Aquaculture feed as a major Global problem.

The Snowball is growing!!!!
Reply With Quote Quick reply to this message

Quick Reply

Register Now

In order to be able to post messages on the Fly Fishing Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Home Waters
Your home waters
Current Favorite Fly
If you only had one... (change anytime)


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Food for thought? juro Stripers and Coastal Gamefish 0 08-19-2010 05:06 AM
Food for thought... or thought for food juro Worldwide Flyfishing Discussion 1 04-28-2009 07:45 AM
Court Ruling Protects Salmon and Clean Water from Harmful Logging salmo Our Environment 0 04-11-2007 06:59 PM
Thought's From Behnke DEERHAAWK Our Environment 3 11-12-2004 07:25 AM
Food for thought FishHawk Stripers and Coastal Gamefish 10 09-04-2001 05:00 AM

All times are GMT -5. The time now is 12:53 AM.

vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright (All Rights Reserved)