BIO374H5 Chapter Notes - Chapter 10: Polyculture, Biofouling, Action Potential
Document Summary
Aquaculture cultivation of aquatic animals, e. g. , finfish and shellfish, Worldwide demand for aquaculture products will grow by 70% during the next 30 years. More than 50% of all fish stocks = fully exploited. Another 30% = overexploited, depleted, or recovering. Bait fish for commercial + recreational fishing. Make fishmeal and oils for animal feed for poultry, cattle, scine, Some transferred to net pens/cages to reach final size: reared fish grow to desired size for market. E. g. , west virginia fisheries biologists provide rearing cold-water species (rainbow trout + arctic char) high-quality environments at abandoned coal mines. Polyculture integrated aquaculture; raising more than 1 species in the same controlled environment. Minimize cost of artificial filtration and removal of wastes; limits amount of wastewater effluent. Hydroponic systems small-volume water-flowing systems in which vegetables or herbs are cultured in racks through which wastewater from fish tanks can flow. Selective breeding: growth rate and body characteristics (muscle mass vs. body fat)
