Tag Shrimp

A laboratory study at the University of Arizona examined the effects of tilapia to control EMS and mortality in Pacific white shrimp.in controlling AHPN. 

Mushiness of shrimp tails is often associated with head-on shrimp. Results from the authors’ study, however, indicated that texture values did not vary much between headless and head-on shrimp stored over a two-week period at 4 degrees-C. 

The use of biofloc systems for shrimp culture requires monitoring of water quality parameters, particularly suspended solids levels. 

Phytogenics comprise a class of plant-derived feed additives that improve animal performance. They have been shown to exert multiple positive effects in fish and shrimp, including improvement of feeding efficiency and digestion, reduction of nitrogen excretion and improvement of gut flora and health. 

A study of shrimp promotions by supermarkets in northern Spain indicated that shrimp prices evolve in accordance with demand quantities. In periods of high demand, retailers generally increase prices to maximize margins. 

Field trails in Alabama, USA, demonstrated the potential of raising striped mullet with Pacific white shrimp in inland ponds. Using wild-caught fingerlings at low density, the trials found the same survival rates as for mullet and shrimp grown separately. 

Based on the results of a study in Peru, the authors found that the high volumes of quick lime and hydrated lime needed to effectively control vibriosis outbreaks in shrimp ponds would raise pH levels in culture water and stress the animals under culture. 

In trials raising larger juvenile shrimp than those used previously in indoor super-intensive recirculating raceway systems, the positive effects from increased stocking size, growth rate and survival resulted in a reduced crop duration time. 

Extrusion manufacturing of aquafeeds has recently seen advances in several areas. The development of new die technology has multiplied hourly output. 

In studies of early mortality syndrome/acute hepatopancreatic necrosis syndrome at an Agrobest shrimp farm in peninsular Malaysia, results indicated that the disease originated with infected postlarvae and quickly spread throughout the farm. 

The authors tested the effects of sequencing autotrophic and heterotrophic dominance on water quality levels in a recirculating system raising shrimp. Culture tanks were inoculated with nitrifying bacteria, and chemoautotrophic dominance was maintained. 

Protein hydrolysates can be produced by acid, base or enzymatic hydrolysis processes. Acid hydrolysis produces salt that makes the product unsuitable for food and destroys some essential amino acids. An optimum process for one fish or shellfish by-product may not be optimum for another. 

To meet demand and maintain the sustainability of the shrimp aquaculture industry, commercial synthetic artemia has been developed for use as a bio-secure replacement for live artemia in larviculture. 

Research continues in the global efforts to identify the cause of acute hepatopancreatic necrosis syndrome in farmed shrimp and find solutions to stop the major losses caused by its spread. 

Controlled by timers, automatic feeders should be placed in deeper areas of ponds and away from aerators. Overfeeding is rare during automatic feeding, and pond bottom quality is maintained through grow-out cycles.