Fishery Issues

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Fishery Issues
By Andrew Rodrigues, Stevie Ray Sendejas, Sayed
Hashimi
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Outline Fish Farming Methods in use
Today Fish Farming Facts Fish Production
Worldwide Fish Farming Issues Genetically
Altered Fish Summary Of Fish Facts
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Current Fish Farming Methods in use today Fish
Farming Human made fisheries Wild Fish Farming
Natural fish supplies currently being exploited
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Fish Farming Facts 40 of all fish farming is
now done from land based offshore farms Demand
for fishing products have doubled since the 50s
and are still rising at an alarming rate Ocean
gives nearly 100 million tons of fish annually
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Top Fish production worldwide 1999
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Top Fish production worldwide 2004
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Top Aqua cultural species farmed worldwide
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Fish farming Issues Recent studies have shown
that overfishing and harmful aquaculture
practices can seriously damage the ocean Marine
aquaculture by using methods such as fish in
cages and so-called net pens pollutes the
environment by spreading waste to the ocean
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This waste is a combination of nutrients, uneaten
feed, fish sewage and dead fish This pollution
is called utrophication Algae and plankton feed
on these pollutions. The decomposition process
consumes dissolved oxygen from surrounding water
and sediments, making the area less able to
support life.
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On fish farms up to 40 of the fish may die
before farmers can kill them so a large amount of
pollution is created Some fish are raised in
very poor conditions and dirty water which to
keep the fish healthy they put a large amount of
chemicals into the water which also cause
pollution
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However there is some ways fish farming can
actually be helpful and clean the water such as
Bivalve shellfish which filter up to 55 gallons a
day of the ocean seawater These types of fish
farms might be able to be used in conjunction
with the highly pollution ones to help compensate
for the large amount of waste produced
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A new technology in fish farming is that
companies such as Aqua Bounty Technologies wish
to use genetically altered salmon which grow year
round instead of just summer This so called
AquAdvantage fishing is supposedly able to reach
market size twice as fast as normal fish farms
and produce less waste
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Also using genetically altered fish that are
designed to resist disease, tolerate cold water,
and convert feed to body mass more efficiently
for food could lower seafood production costs and
reduce the need for antibiotics in fish
farming However some worry that these Modified
fish could pose problems to the environment if
they escaped into the wild
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A negative about genetically altered fish is that
they have proteins that trigger allergies,
biologically active substances such as growth
hormones and toxic metabolites are created
through the genetic engineering process. Also if
these fish escaped they could become an invasive
species because the lack of natural predators
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Summary of Fish Farming Facts Most of our
current fish farming either in wild or man-made
fisheries have reached or exceeded their natural
limits These man-made fish farms cause a high
amount of pollution in our oceans with chemicals
and the waste produced by fish
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Species such as Bivalve shellfish could be used
in conjunction with fish farming to help keep our
water clean and reduce pollution Genetically
engineered fish could be a solution in the Near
Future to reducing waste and helping make more
healthy fish Genetically altered fish however
could cause serious problems in the Ocean by
creating an invasive species and having chemicals
in them that could produce problems in the near
future
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Work Citied Edward D. Houde, Joachim Scharfe,
marine fishieres, in AccessScience_at_McGraw-Hill,
http//www,accessscience.com, DOI
10.1036/1079-8542.406100 Cooper, Mary H.
"Threatened Fisheries." CQ Researcher 12.27
(2002) 617-648. CQ Researcher Online. CQ Press.
Your library's name, city, state abbreviation. 6
Nov. 2007 lthttp//library.cqpress.com/cqresearcher
/cqresrre2002080200gt. Weeks, Jennifer. "Fish
Farming." CQ Researcher 17.27 (2007) 625-648. CQ
Researcher Online. CQ Press. Your library's name,
city, state abbreviation. 6 Nov. 2007
lthttp//library.cqpress.com/cqresearcher/cqresrre2
007072700gt.