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Author Topic: Salmon Feedlots using night lights to attract wild fish?  (Read 24500 times)

Bassonator

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Re: Salmon Feedlots using night lights to attract wild fish?
« Reply #45 on: August 02, 2012, 09:25:21 PM »

I am confused Bassanator you are for fish farms but against oil....

Funny as the only positive that farms seem to offer has been determined in past posts is profit and a few jobs ....oil makes profit big time and offers plenty of jobs ...what with all the messy cleanups.

Awww what the hell they are going to go extinct so we may as well get the profits before someone else does ...right



Like Ive always said" If the fish farms dont kill em then the sporties and commies will'.. ;) ;) ;)
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troutbreath

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Re: Salmon Feedlots using night lights to attract wild fish?
« Reply #46 on: August 02, 2012, 10:05:43 PM »


We love ya TB. ;D ;D ;D



watch your back bibster ;D got bacon in my pocket
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speycaster

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Re: Salmon Feedlots using night lights to attract wild fish?
« Reply #47 on: August 02, 2012, 10:37:14 PM »

Just take the B out of bassonatar. ;D ;D
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Bassonator

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Re: Salmon Feedlots using night lights to attract wild fish?
« Reply #48 on: August 02, 2012, 11:09:17 PM »

Just take the B out of bassonatar. ;D ;D

You thought that up all by your lonesome.......Wow ;D ;D ;D  Another one whos staring right at the name and still cant spell it right.. ???
« Last Edit: August 03, 2012, 08:02:21 AM by Bassonator »
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AnnieP

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Re: Salmon Feedlots using night lights to attract wild fish?
« Reply #49 on: August 03, 2012, 11:04:02 AM »

We are all aware of how salmon feedlots pollute the ocean floor, spread diseases and sea lice...... however I wonder how many people are aware that the feedlots use night lights to attract wild fish to the pens. Is this where some of the sockeye smolts are disappearing as they migrate past the feedlots? Is this a way for the feedlots to cut down on fish meal costs? Why is it allowed?

http://www.iasproducts.com/aLUWLightingSel.html

Effect of artificial light on wild fish and zooplankton in an area of active salmon farming http://salmoncoast.org/artificial_light_effects_mcconnell
 
Project Summary

This project looked at the effect of artificial light on wild fish and invertebrates. Artificial light can change the behaviour of aquatic organisms, though the direction of response can be species and life-stage specific. Open net-pen salmon farms in British Columbia routinely illuminate their net pens during the winter and spring, with unknown consequences on the abundance and distribution of marine fish and invertebrates.

This project conducted paired lit and control samples consisting of plankton hauls and purse seines around a 400W underwater light such as those used on salmon farms. Invertebrates were marginally more abundant on lit nights, while larval fish and non-larval fish were significantly more abundant on lit nights. In particular, the invertebrate taxa Gastropoda and Bivalvia were significantly more abundant on lit nights, as were the fish species, Pacific herring (Clupea pallasi), sand lance (Ammodytes hexapterus), threespine stickleback (Gasterosteus aculeatus), soft sculpin (Psychrolutes sigalutes), and great sculpin larvae (Myoxocephalus polyacanthocephalus). These results suggest that lights commonly used in open net-pen aquaculture may increase the abundance of some fish species around pens, thereby increasing the probability that farmed fish and wild species directly and indirectly interact in coastal marine environments.



Nothing like digging up a rehash of another of Morton's  theories.  There are a few good reasons for the systems being lit besides fooling Atlantics into not going broody and wanting to spawn. Has it occured to you that the farms would be a hazard to navigation at night if there was no lighting or that lighting is necessary for workers to see their way around the system at night ? This is an old claim from Morton and has no merit. Like everything she claims in  one study she claims there is no life around and under the farms and in the next she claims the pens are full of wild fish enticed there by lights to supplement  fish fodder. Blah Blah Blah
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alwaysfishn

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Re: Salmon Feedlots using night lights to attract wild fish?
« Reply #50 on: August 03, 2012, 06:49:48 PM »

Has it occured to you that the farms would be a hazard to navigation at night if there was no lighting or that lighting is necessary for workers to see their way around the system at night ?

That's a good one Annie.....  ;D  ;D

Is that why they put green lights under water?  Aren't lighthouses (which are used for navigation) normally above water?

At least Absolon backs up his defense of feedlots with some facts on occasion....  You just make stuff up.
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Bassonator

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Re: Salmon Feedlots using night lights to attract wild fish?
« Reply #51 on: August 03, 2012, 10:51:16 PM »

Heres a plan for ya AF grab the grandkids and a camera , tell em your going to show them how bad fish farms actually are and then grab us a picture or 2 of these green lights, then Ill believe ya but until that time its just more hueyy from an armchair biologist..... :D :D :D
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AnnieP

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Re: Salmon Feedlots using night lights to attract wild fish?
« Reply #52 on: August 06, 2012, 01:48:42 PM »

It's good to see you took some time to read the entire report before commenting further.....

As you have noted the lights attract virtually every fish that is in the area including salmon. I did notice how you failed to acknowledge the fact that the study was conducted when no sockeye were in the area.

So considering the feedlots use lights to attract fish so that they can use this free feed to raise their penned salmon, how much free product are they pulling out of the ocean that could be used to feed the wild salmon?

Most of us thought that these pens were just pollution and disease generators but we now see that they are raping and pillaging the feed fish and salmonoids as well by baiting them with light.....   Shameful really!  :o


Apparently you don't know that as far as MHI goes the wild fish are graded out of the pens. http://www.youtube.com/watch?v=Nwr7bJZUzs0&list=PL2B72A35640BB31D1&feature=plcp


My husband runs the boat doing the grading for your information now accuse me of making that up ?? :-*
« Last Edit: August 06, 2012, 01:54:44 PM by AnnieP »
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AnnieP

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Re: Salmon Feedlots using night lights to attract wild fish?
« Reply #53 on: August 06, 2012, 01:50:58 PM »

That's a good one Annie.....  ;D  ;D

Is that why they put green lights under water?  Aren't lighthouses (which are used for navigation) normally above water?

At least Absolon backs up his defense of feedlots with some facts on occasion....  You just make stuff up.



Actually I think your the one making stuff up. Quoting Morton also qualifies as making stuff up.
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alwaysfishn

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Re: Salmon Feedlots using night lights to attract wild fish?
« Reply #54 on: August 06, 2012, 02:13:56 PM »


Apparently you don't know that as far as MHI goes the wild fish are graded out of the pens. http://www.youtube.com/watch?v=Nwr7bJZUzs0&list=PL2B72A35640BB31D1&feature=plcp


My husband runs the boat doing the grading for your information now accuse me of making that up ?? :-*

Thanks Annie.....  proves the point that the feedlots are attracting wild fish using lights and of course the feed, or why else would they have to invest in a separator machine.  Of course the separator machine isn't going to help all the salmon fingerlings that have been swallowed up by the feedlot salmon, is it?
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alwaysfishn

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Re: Salmon Feedlots using night lights to attract wild fish?
« Reply #55 on: August 06, 2012, 02:15:30 PM »



Actually I think your the one making stuff up. Quoting Morton also qualifies as making stuff up.

If you read through the beginning of the thread you would see I'm not making this stuff up....
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Bassonator

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Re: Salmon Feedlots using night lights to attract wild fish?
« Reply #56 on: August 06, 2012, 03:28:15 PM »

Actually Ive read the links you posted and Annie is right anything after that, youre making it up, problem is your so caught up in your own BS that you actually believe it, and that lets people like Morton know thier brainwashing is working.
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AnnieP

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Re: Salmon Feedlots using night lights to attract wild fish?
« Reply #57 on: August 06, 2012, 06:03:16 PM »

If you read through the beginning of the thread you would see I'm not making this stuff up....


No Morton made it up your just rehashing it. Small fish are graded out and back into the water . End of story. Argue all you like it won't change the fact your wrong.
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aquapaloosa

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Re: Salmon Feedlots using night lights to attract wild fish?
« Reply #58 on: August 09, 2012, 03:43:18 PM »

I said I would post info on this.  Here it is:  

I have not read through the whole thing yet but I am sure it will be interesting.

http://publications.gc.ca/collections/collection_2007/dfo-mpo/Fs97-4-2662E.pdf

The potential for predation by caged Atlantic salmon on wild food organisms has
raised concerns about the possible impacts on local populations of wild fish species in
the vicinity of fish farms.  The use of bright lights on some sites had raised specific
concerns that wild species of fish and zooplankton were being attracted to the lights and
were then being consumed by the captive salmon.  We collected and examined
stomachs from Atlantic salmon reared at four different aquaculture sites on the northern
end of Vancouver Island.  One site used large lights as a technique to enhance growth.  
We examined a total of 600 stomachs from all sites collected over a 9-week period.  We
collected another 134 stomachs from an experimental aquaculture site near the Pacific
Biological Station, Nanaimo.  Most gut contents were contained within caecae, in
various states of digestion.  The gut contents varied in time and within and among pens
but very little wild feed was taken by salmon at any of the sites.  The main wild
organisms consumed were caprellids, small crustaceans that are part of the ‘fouling’
community that grows on the webbing of nets on the cages where the fish are held.  
There were some wild pelagic organisms such as copepods and euphausiids but these
were rare.  Only one fish was found in the stomachs, a small sand lance (Ammodytes
hexapterus).  No fish larvae were found in the stomachs but very small items, such as
larvae of marine fish such as herring (Clupea pallasi) or eulachons (Thaleichthys
pacificus) might have gone undetected because after a short time in the stomachs, the
fragile tissue in fish larvae would have been unrecognizable. It is probable, however,
that if substantial numbers of fish larvae had been consumed, we would have detected
some.  There were no obvious differences in the consumption of wild organisms among
the sites and lights had no apparent effect on the consumption of wild food.    

http://publications.gc.ca/collections/collection_2007/dfo-mpo/Fs97-4-2662E.pdf
« Last Edit: August 09, 2012, 03:48:27 PM by aquapaloosa »
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alwaysfishn

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Re: Salmon Feedlots using night lights to attract wild fish?
« Reply #59 on: August 09, 2012, 08:35:39 PM »

I said I would post info on this.  Here it is:  

I have not read through the whole thing yet but I am sure it will be interesting.


This study confirms that the Atlantics eat wild fish and that lights attract plankton which in turn attracts wild fish.

The problem I see with the study is that they sampled only fish that were attracted to feed pellets rather than randomly sampling fish from the pens. Likely the Atlantics eating the wild fish weren't hungry any way so they didn't chase the feed pellets..... The quantities of wild fish eaten by the Atlantics can't be relied on with that sort of sampling.

If you haven't read it here is the report I referenced in the beginning of this thread. http://www.int-res.com/articles/meps2010/419/m419p147.pdf    The problem I see with this study is that it doesn't simulate a feedlot scenario, it just uses lights.
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