Impact of feeds on development of the digestive system of burbot (Lota lota Linnaeus, 1758) reared in aquaculture

Jarak, Matea (2015) Impact of feeds on development of the digestive system of burbot (Lota lota Linnaeus, 1758) reared in aquaculture. Diploma thesis, Faculty of Science > Department of Biology.

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Abstract

This study describes impacts of feeds on development of the digestive system of burbot larvae (Lota lota Linnaeus, 1758) reared in recirculatory systems in aquaculture. The larvae diet starts with feeding larvae living prey and after they switch to manufactured diet which affects the mortality rate. Because of it, the aim of this experiment was determinate the period of weaning start, considering the development of the digestive system. In this study, histological sections of the posterior gut from 72 burbot larvae reared in hatchery in education and research facility from Zele, Belgium were analysed. Sampled larvae were divided into two groups: one group started weaning process in 6th week of life, where the second one started weaning in 8th week of life. The sections were stained with hematoxilin and eosine, combined periodic acid and Schiff reagens (PAS) and alcian blue (AB). The whole body length, wet body weight, the mucosa surface and epithelia height were measured, and goblet cells per mucosa and AB and PAS positive goblet cells were counted. Whole body length, wet body weight, the mucosa surface and epithelia height, count of goblet cells per mucosa measured and count of AB and PAS positive goblet cells positively correlated with the larvae age in both groups. The larvae that started with early weaning in 8th week showed a better growth in length and weight.

Item Type: Thesis (Diploma thesis)
Keywords: Lota, hindgut, comercial diets, goblet cell, epithelia
Supervisor: Zanella, Davor
Date: 2015
Number of Pages: 36
Subjects: NATURAL SCIENCES > Biology
Divisions: Faculty of Science > Department of Biology
Depositing User: Grozdana Sirotic
Date Deposited: 20 Apr 2015 11:45
Last Modified: 20 Apr 2015 11:45
URI: http://digre.pmf.unizg.hr/id/eprint/3843

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