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Old 02-26-2009, 03:44 PM   #1
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Default Sailfin catfish (Pterygoplichthys pardalis and P. disjunctivus), commonly known as janitor fish

These fish are plecos, or algae eaters. Who hasn't bought one to use in their aquarium to keep their glass free of algae?

Janitor fish offers fisherfolk income opportunity
Written by Jonathan L. Mayuga / Correspondent
Wednesday, 11 February 2009 20:35

http://businessmirror.com.ph/index.php?option=com_content&view=article&id=5929: janitor-fish-offers-fisherfolk-income-opportunity-&catid=53:agri-commodities
excerpts from above
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THE lowly Sailfin catfish (Pterygoplichthys pardalis and P. disjunctivus), commonly known as janitor fish, could be an alternative source of protein and actually help enhance the growth of chicken and swine, a study commissioned by the World Bank and the Laguna Lake Development Authority (LLDA) show.

Although the study recommended further studies on the janitor fish to effectively address its invasiveness, it also concluded the janitor fish could open up new livelihood opportunities in the years to come.

The project aims to control the species’ invasiveness and at the same time look at how fisherfolk may gain additional income from the specie. The premise is to use the janitor fish as an ingredient of feeds for pig and poultry.
“Benefiting from the Dreaded Janitor Fish”
http://web.worldbank.org/WBSITE/EXTERNAL/OPPORTUNITIES/GRANTS/DEVMARKETPLACE/0,,contentMDK:20504548~pagePK:180691~piPK:174492~t heSitePK:205098,00.html
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The project creates a monetary value for a worthless pest while addressing the high cost of animal and fish feed. The project solves both problems by establishing the viability of using the janitor fish for fish and animal feed, and by training marginalized fish and hog farmers to manufacture such feed. The fishing community will now have an incentive to harvest the janitor fish and sell it, thus checking the species’ invasiveness while yielding additional income for small-scale fisherfolk. The project plans to set up 4 hectares of fish cages to catch the fish and engage the cooperation of 10 hog farmers.


These fish are established in the United States. Imported for re-sale by the aquarium industry, this is another classic example of people releasing pets.
http://www.absoluteastronomy.com/topics/Pterygoplichthys
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These fish have been introduced into many locations. Several species of Pterygoplichthys have been established in the United States in Flrodia, Hawaii, Nevads, and Texas. Established species include P. multiradiatus in Florida and Hawaii, P. disjunctivus in Florida, and P. anisitsi in Texas.Sailfin catfish are one of the more successful established exotic fish in Florida in terms of their range extension and abundance, yet their presence has not had any measurable effect on native fishes, although they have contributed significantly to the carrying capacity of some fish communities. Moreover, none of the 30 professional water managers, engineers, lake management, and shoreline stabilization company owners contacted in 2004 by a particular study considered erosion caused by the burrowing activity of loricariid catfishes a major problem, except in some man-made lakes in the southeastern part of the state.

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Old 02-26-2009, 06:15 PM   #2
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"The fishing community will now have an incentive to harvest the janitor fish and sell it, thus checking the species’ invasiveness while yielding additional income for small-scale fisherfolk. "

As long as it doesn't get TOO profitable, to the point they start raising the pests, who then escape, etc, etc.
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