Energy efficiency of aquaculture
Readily available energy has supported expanded seafood production. Feed production is the major energy-consuming aspect of finfish and crustacean culture.
Lake, reservoir characteristics affect cage culture potential
Culture cages should be installed in areas with good water circulation and not placed in embayments with narrow openings or very shallow water.
Integrated multi-trophic aquaculture, part 2
Regulatory frameworks and financial incentives may be required to fully realize the benefits of integrated multi-trophic aquaculture systems.
Integrated multi-trophic aquaculture, part 1
Integrated multi-trophic aquaculture involves cultivating fed species with extractive species that utilize inorganic and organic wastes for their growth.
Farming algal fuel: Economics challenge process potential
Algae offer advantages over terrestrial plants for biofuel production: short generation cycles and fast population growth. Algal fuel production would spare corn and soybeans for consumption as food for humans.
In-pond raceway system demonstrates economic benefits for catfish production
Auburn University researched how to improve economic efficiency and profitability of catfish production with in-pond raceway systems. IPRS systems help achieve high levels of feed performance and fish survival, and lower production costs.
Membrane biological reactors provide wastewater treatment, resource reclamation
Membrane biological reactors provide wastewater treatment by utilizing activated sludge to remove nitrogen, phosphorus and biological oxygen demand. The reactors also have the potential for nearly complete water recovery in fish culture systems.
Simple settling chambers aid solids management in biofloc system
A study examined the effects of removing suspended solids using side-stream settling chambers in a superintensive biofloc shrimp system. The chambers reduced nitrate-nitrogen and phosphate concentrations and improved shrimp growth rate and biomass.
Pond fertilization reevaluated
Although higher rates have been promoted, pond fertilization ratios of 2:1 or 1:1 nitrogen to phosphorus should be maintained in older ponds for food fish production.
Cage production experiments conducted with shrimp in Costa Rica
Production of Pacific white shrimp in near-shore floating cages at sea was shown technically and economically feasible at small scale for several growing cycles, as managed by artisanal fishers and their families on the Pacific coast of Costa Rica.
Grassroots oyster aquaculture provides habitat for juvenile blue crabs
Juvenile blue crabs prefered floats containing three-dimensional structure provided by oysters and shells, which helped provide refuge from predators.
Shrimp feed bags recycled in Mexico
Based on the need to utilize thousands of used plastic feed bags rather than dispose of them, VIMIFOS began selling the bags to companies that reprocess them into pellets used to make plastic utensils.
Life cycle assessment in aquaculture
Life cycle assessment studies the environmental and other potential impacts throughout a product’s life, starting at raw material and following it through production, use and disposal.
New Zealand addresses social factors in aquaculture development
The regulatory system for aquaculture in New Zealand addresses social and cultural factors through legislation and policies that strongly utilize public consultation. The indigenous Mäori people, for example, play an integral role in aquaculture development.
Examining water temperature in aquaculture
Water temperature is a key water quality variable in aquaculture because it influences other variables, defines growing seasons and dictates what species can be grown at a particular location.
High-density split-pond systems offer high output, low maintenance
The split-pond culture system offers several advantages over traditional fish ponds. Aerating the small fish-confinement area is more effective at maintaining adequate levels of dissolved oxygen than in traditional ponds.