Activity of the digestive protease, chymotrypsin, in larvae of the cultured sharpsnout sea bream (diplodus puntazzo)
Küçük Resim Yok
Tarih
2008
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Specific and total activity of the digestive protease, chymotrypsin, was studied in cultured sharpsnout sea bream larvae (Diplodus puntazzo) for 35 days from hatching and in a variety of pH levels. Activity was detected upon hatching (2.8 ± 0.34 mm total length), before the onset of exogenous feeding. Specific chymotrypsin activity exponentially increased from mouth opening on day 3 until day 25, then dropped until the end of the experiment. Total chymotrypsin activity sharply increased to day 10, then continued to increase, but slightly, until the end of the experiment. As expected, pH strongly affected both specific and total chymotryptic activity in the digestive tracts of larvae. Both were significantly lower when pH was acidic (1.5, 3.0, 4.0) than when it was alkaline (8.0, 9.0, 10.0) although there were no significant differences within either the acidic or the alkaline range. Our results indicate that chymotrypsin activity is capable of digesting protein before mouth opening and may be a valuable tool for better understanding the nutritional capabilities of young larvae.
Açıklama
Anahtar Kelimeler
Chymotrypsin, Digestive enzyme, Diplodus puntazzo, pH, Sharpsnout sea bream larvae
Kaynak
Israeli Journal of Aquaculture - Bamidgeh
WoS Q Değeri
Scopus Q Değeri
Q4
Cilt
60
Sayı
2
