Aquaculture

“Recirculating aquaculture systems cut the pollution and disease that occur in current fish farming operations,” begins an article entitled “Recirculating aquaculture systems: The future of fish farming?”

Inside what looks like a plastic-roofed greenhouse sitting in an old cow pasture are six round, 1,500-gallon tanks (imagine kiddie pools that are eight feet deep), each holding a few hundred rainbow trout. A tangled network of PVC pipes – some as thick as tree trunks, others as slender as pool cues – traces crooked patterns in the cramped space, which is alive with the sound of whirring motors and lots of water, dripping, bubbling, and gushing steadily through the whole convoluted system.

. . . . .

Recirculating aquaculture systems, or RAS, are closed-loop production systems that continuously filter and recycle water, enabling large-scale fish farming that requires a small amount of water and releases little or no pollution.

About 99.75 percent of the water in each unit is continuously cleaned and returned to the fish tanks. Manure filtered from the water during the recycling process is used as fertilizer on nearby farm fields. The nutrient-rich water can also be used to feed vegetables and herbs in large-scale aquaponics systems, which in turn filter the water for reuse.

The comprehensive technology number and interdisciplinary number for aquaculture is 639.8 Aquaculture.  Examples of works classed in 639.8 are Aquaculture: Principles and Practices, Cage Aquaculture, and Recirculating Aquaculture.

The entry 639.8 Aquaculture has the scatter note: “Class aquaculture of a specific kind of animal with the kind, e.g., aquaculture of fishes 639.3.”  Works on salmon farming, for example, are classed in 639.3756 Culture of salmon (built with 639.37 Culture of amphibians and specific kinds of fishes plus 56 from 597.56 Salmon, following instruction at 639.372–639.377 Culture of specific kinds of fishes), e.g., Handbook of Salmon Farming.  Works on aquaculture of tilapias are classed in 639.3774 Culture of Cichlidae (built with 639.37 plus 74 from 597.74 Cichlidae; 597.74 has “tilapias” in the including note,and the Relative Index entry “Tilapias”), e.g., Tilapia Culture.

Comments

[jamie]

Just discovered this great blog. Why is it great? I'm managing a tiny resource centre and often get stuck with which ddc no. to use. This is a great reference source for any librarian. Thanks so much! :)

[fish breeding]

recirculation systems are the future of fish farming. WIth the seas being raped fish breeding and growing will happen in RAS systems.