Soy products replace fishmeal in offshore cobia feed study
A project of the Soy-in-Aquaculture program evaluated the feasibility of using soy protein concentrate and soybean meal to replace fishmeal in cobia diets.
Shrimp hatchery production: myth vs. reality
The quality of postlarvae supplied by a shrimp hatchery can vary considerably. Common myths, such as acceptance of low survival and insufficient concern for water quality, can contribute to lower animal quality.
Tobacco dust: natural molluscicide for aquaculture applications
Research found that tobacco dust applied in culture water killed ramshorn snails within three days and did not compromise channel catfish.
Lobster farming in Indonesia
A multinational project in Lombok, Indonesia, is focused on the identification and monitoring of improved seed collection and grow-out production methods for spiny lobsters.
Practical feeds without fishmeal suitable for gilthead sea bream
In a study, the performance of gilthead sea bream juveniles fed diets with no fishmeal was compared to that of bream fed diets with 30 or 10 percent fishmeal.
Shrimp necrosis has infectious etiology
Researchers studied the nature of muscle necrosis in shrimp by sampling infected shrimp from local ponds and challenging healthy specimen with filtrates from the diseased shrimp.
Toxicity vs. detection
The 2001 detection of chloramphenicol in shrimp imported into the Netherlands heightened awareness of and anxiety over the presence of chemicals in food.
Aquaculture disease diagnosis is detective work
Those charged with determining the underlying cause of a disease outbreak have a wide variety of detective tools at their disposal.
Settling chambers remove suspended solids, but limit biofloc in shrimp system
Shrimp survival, weight, yield and feed conversion were better in farm units that operated with settling chambers for solids removal than in units without.
Recent developments in biofloc technology
Combining biofloc technology with bio-secure modular shrimp culture can make operations more sustainable and economically viable. For optimized biofloc production, lined ponds and reservoirs and high stocking densities are essential. Paddlewheel aerators keep dissolved-oxygen levels high.
Aquaculture in Germany
Germany produces a limited amount of carp, trout, mussels and other species. Although traditional pond-based farms continue to operate, the country’s aquaculture production is trending toward land-based systems that feature efficient resource use and reduced environmental impacts.
Spermatophore regeneration in black tiger shrimp
Male reproductive dysfunction has been increasingly reported in commercial shrimp maturation facilities. The authors recently carried out studies to characterize the reproductive capability of male black tiger shrimp.
Shrimp genetic improvement in Ecuador
One of the largest shrimp maturation operations in Ecuador is working with five major shrimp producers to improve growth rates.
Early Mortality Syndrome threatens Asia’s shrimp farms
The emerging disease Early Mortality Syndrome has caused large losses among shrimp farmers. EMS is characterized by mass mortalities during the first 30 days of culture.
Effective management avoids gas bubble trauma
When aquaculture pond water suddenly warms, gas bubbles can form in the blood of aquatic animals and lead to stress or mortality.
Peru project studies blood cockles for stock enhancement, aquaculture
In Peru, some wild cockle communities have been so overfished that total fishing bans are being considered. A project was therefore established to develop sustainable spat production as a crucial step toward the implementation of a conservation strategy for blood cockles that fosters social aquaculture and stock enhancement. The project rested on the establishment of protocols for reproduction, larval culture and seeding; development of diagnostic tools for molluscan pathogens and the study of blood cockles’ genetic diversity.