Astaxanthin krill oil can result in a significant advantage for Pacific whiteleg shrimp in the post-larval stage, reducing mortality and the length of the production cycle, according to a new study.
The study, ‘Effect of dietary graded levels of astaxanthin krill oil and high protein krill meal on the growth performance and resistance of post-larval Litopenaeus vannamei under hyper-intensive nursery culture’, was conducted by the Instituto de Ciências do Mar, Brazil (Labomar) and Aker BioMarine and found that dietary supplementation of astaxanthin krill oil increased body weight, led to higher survival rates when the shrimp were exposed to stress and possibly increased essential fatty acids.
“Overall, our findings reveal that dietary inclusion of 30-50 grams of astaxanthin krill oil per kilogram of diet, combined with 80 grams of krill meal, has a strong effect on the growth and survival of post-larval Pacific whiteleg shrimp raised under high density conditions,” said Dr Alberto J.P. Nunes from Labomar and one of the authors of the study.
The study was carried out at Labomar’s facility in Brazil using two different rearing systems, one indoor (50 tanks) and one outdoor (40 tanks). The outdoor set received varying levels of QRILL AstaOmega Oil from Aker BioMarine, along with a control diet devoid of any krill oil.
The indoor set’s diet included varying levels of both astaxanthin krill oil and krill meal, to evaluate their effectiveness as substitutes for fish oil and fish meal. These diets were compared to a control diet without krill oil or meal.