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Effect of different protein sources on protease activity of northern pike, Esox lucius Linneaus 1758, juvenile
Abstract
The aim of the study is to determine the inhibitory effect of different protein sources on protease activity of Northern pike, E. lucius, during larval ontogeny. For this purpose, Northern pike were fed from yolk sac absorption until 21 days after hatching (DAH). At that point, larvae were sampled on 7, 14 and 21 DAH days and the activity of enzyme was analyzed in vitro. In the study, two different fish meal, chicken meal, krill meal, corn gluten, soybean protein concentrate, soybean meal and dried distillers grains with solubles were tested. Fish meal-I showed the lowest effect (7.53 %) on 7 DAH larvae. Moreover, chicken meal has the highest inhibitory effect on the proteases in the first week (68.27%). In the following period (DAH 14), although the inhibition ratio dramatically increased in all ingredients, fish meal-I has still the lowest effect on proteolytic activity (55.66%). In the same period, the highest effect was obtained from krill (82.28 %) and chicken meals (86.73 %), respectively. Then, there was no statistical difference between fish meal-I, fish meal-II and corn gluten in the 21 DAH and relatively lower than the others (p>0.05). Additionally, chicken meal again has the highest effect on juveniles with the ratio 89.27 %. As a result, the increase of proteolytic activity was notably increased in 7-14-21 DAH, however, it is concluded that feeding larvae and juveniles with live prey is still suggested to get better result for such a carnivorous species culture.
Keywords
Destekleyen Kurum
Hatay Mustafa Kemal University Scientific Projects Department
Proje Numarası
16792
Teşekkür
Special thanks to Francisco Javier MOYANO for sharing enzyme analyze methods and for future project ideas. The present work was supported from Mustafa Kemal University Scientific Projects Department with the project number 16792
Kaynakça
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Ayrıntılar
Birincil Dil
İngilizce
Konular
Yapısal Biyoloji
Bölüm
Araştırma Makalesi
Yayımlanma Tarihi
15 Haziran 2020
Gönderilme Tarihi
30 Ekim 2019
Kabul Tarihi
29 Kasım 2019
Yayımlandığı Sayı
Yıl 2020 Cilt: 37 Sayı: 2