is a form of agriculture that involves
the propagation, cultivation, and
marketing of aquatic animals and
plants in a controlled environment.
Aquaculture
covers a very large area of knowledge and involves many general engineering specialisms such as mechanical engineering, environmental engineering, materials technology, instrumentation, and monitoring, and building design and construction.
Aquaculture Engineering
World fish farming was first
practiced as long ago as 2000
B.C., in ____.
China
In the _______ can be
traced back to the mid to late
l9th century when pioneers
began to supply brood fish,
fingerlings, and lessons in fish
husbandry to would
United States
In early 1960’s,
commercial fish culture
in the ______ was
mainly restricted to
rainbow trout, bait fish,
and a few warm water
species, such as the
buffaloes, bass, and
crappies.
United States
Challenges in early aquaculture
- operators were not experienced in fish culture.
- low-value species were being raised
- ponds were not properly built
- selected species lacked adequate technical support.
Firmly established catfish industry, which originated in the southeastern United States, started in the late _____.
1950s
How many phases are there in the Catfish Industry?
4 Phases
This phase was characterized by rapid expansion and relatively high production costs that resulted in low yields and inefficiency.
1st phase or pioneering phase (1960– 1970)
This phase gave rise to major improvements in production and lower unit costs. Average annual yields increased from 1,500–2,000 to 3,000–4,000 lb/acre. There was, however, a drastic shakeout of unprofitable and marginal producers when feed costs rose as a result of a scarcity of fish meal.
2nd phase (1971-1976)
This phase saw vastly improved productivity greatly increased acreage, and lower production costs.
3rd phase (1977–1982)
This phase saw a decreased rate of expansion in the catfish industry, while production of other aquaculture products such as salmon, striped bass, crawfish, and tilapia increased.
4th phase (1982– 1989)
The Negative Impacts of Wild Caught Fish (6 +1)
• Environmental Issues
• By-catch
• Overfishing
• Orange Roughly
• Destructions of habitat
• Muroami
• Bottom trawling
Aquaculture is a form of agriculture that involves
the propagation, cultivation, and
marketing of aquatic animals and
plants in a ______.
controlled environment
Negative impact of wild catch fish that is unintentional capture of fishes or non-target fishes
By-catch
Negative impact of wild caught fish that is done to meet the demand
Overfishing
Negative impact of wild caught fishrap that is done through wrapping net around corals then e-hit para ang nagtago na fish kay mugawas
Muroami
Negative impact of wild caught fish that is done by e-labog ang net, tapos bisag unsa lang ang makuha
Trawling or Bottom Trawling
It is estimated that _____ of the
worlds natural fish stocks are
fully to over exploited,
depleted, or in a state of
collapse.
80%
Approximately ____ of
the large predatory fish
are already gone.
90%
(4+1) common Classification of Aquaculture
- Production per unit volume (m3 ) or unit area (m2 ) farmed
- Life stage of the species produced on the farm.
- Type of farming technology used
- Based on the location
- How water is supplied to a farm is used
3 types of aquaculture classified in production per unit volume or unit area farmed
Extensive aquaculture
Intensive aquaculture
Semi-intensive aquaculture
Classification of aquaculture, with low production per unit volume.
Extensive aquaculture
Classification of aquaculture, the species being farmed are kept at a low density and there is minimal input of artificial substances and
human intervention
Extensive aquaculture
