With the shrimp farming industry increasingly moving towards low fishmeal content feeds, practical feed formulations depend on meals, solubles and hydrolysates made from fish, squid, shrimp, krill and molluscs to act as chemoattractants and feeding stimulants. But with such a wide array of options, identifying the optimal marine chemoattractant for a species like whiteleg shrimp has proven incredibly difficult, until now.
Published in the peer reviewed Journal of the World Aquaculture Society, a new study conducted by a team from the Instituto de Ciências do Mar, Brazil (Labomar) in conjunction with Aker BioMarine, has suggested a winner in krill meal.
Assessing the feed preference and the growth response of juvenile whiteleg shrimp (Litopenaeus vannamei) to various different marine chemoattractants, a diet with three percent fishmeal was supplemented with either three percent krill meal, squid meal, shrimp head meal, shrimp meal, squid liver meal, salmon meal, soy protein concentrate or five percent liquid sardine hydrolysate.
With under 100 animals/m2 in 56 1-m3 tanks, shrimp were fed 10 times daily for 74 days. At harvest, the shrimp were counted, weighed, and their growth performance and feed efficiency determined. In order to evaluate feed preference, two-by-two comparisons were carried out, with diets with different chemoattractants delivered simultaneously in two separate feeding trays allocated in each tank.
Read the full article on the International Aquafeed website, HERE.
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| Antarctic Krill Image credit: Aker BioMarine |
Assessing the feed preference and the growth response of juvenile whiteleg shrimp (Litopenaeus vannamei) to various different marine chemoattractants, a diet with three percent fishmeal was supplemented with either three percent krill meal, squid meal, shrimp head meal, shrimp meal, squid liver meal, salmon meal, soy protein concentrate or five percent liquid sardine hydrolysate.
With under 100 animals/m2 in 56 1-m3 tanks, shrimp were fed 10 times daily for 74 days. At harvest, the shrimp were counted, weighed, and their growth performance and feed efficiency determined. In order to evaluate feed preference, two-by-two comparisons were carried out, with diets with different chemoattractants delivered simultaneously in two separate feeding trays allocated in each tank.
Read the full article on the International Aquafeed website, HERE.
The Aquaculturists
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