Dietary zinc requirement of Labeo rohita juveniles fed practical diets

Journal of Applied Animal Research

Zafar Iqbal Khan¹  Mahroze Fatima²  Syed Makhdoom Hussain³  Majid Hussain⁴  Syed Zakir Hussain Shah⁴  Muhammad Afzal⁵  Khadija Akram⁵  Zainab Akram⁵ 

[1] Department of Botany, University of Sargodha;Department of Fisheries and Aquaculture, University of Veterinary and Animal Sciences;Department of Zoology, Government College University;Department of Zoology, University of Gujrat;Fish Nutrition Laboratory, Department of Zoology, Wildlife and Fisheries, University of Agriculture;

关键词: absorption;    alp;    l. rohita;    tbars;    zn;    requirement;   

DOI  :  10.1080/09712119.2019.1613238

来源: DOAJ

【 摘 要 】

The present study was designed to estimate the zinc (Zn) requirement of Labeo rohita juveniles fed practical diet. Treatments used for the study were consisted of six experimental diets supplemented with graded levels of Zn (0, 21, 42, 63, 84 and 104 mg/kg diet) from Zn gluconate. For each experimental diet, two replicates were allocated, and 18 fish were stocked in each replicate. The feeding trial was lasted for 90 days. Results showed that final weight, absolute weight gain, weight gain% and specific growth rate increased with increasing dietary Zn levels up to 42 mg/kg and started to decrease with further increase in dietary Zn level. Quadratic regression analysis of weight gain% data indicated that L. rohita juveniles required 62.58 mg/kg Zn for normal growth. Maximum Zn absorption was observed in fish fed diet supplemented with 42 mg/kg Zn compared with other dietary treatments. Alkaline Phosphatase (ALP) activity in kidney and spleen of L. rohita juveniles increased with the increase in dietary Zn levels up to 42 and 63 mg/kg, respectively. Conclusively, supplementation of graded levels of dietary Zn-gluconate improved the growth performance and increased the Zn bioavailability and ALP activity up to a certain limit in L. rohita juveniles.

【 授权许可】

Unknown