Author(s): Mewes, Juliana Kasper ; Meurer, Fabio ; Tessaro, Lucelia [UNESP] ; Buzzi, Alexandre Henrique ; Syperreck, Mirna Adriane ; Bombardelli, Robie Allan
Date: 2018
Persistent ID: http://hdl.handle.net/11449/162056
Origin: Oasisbr
Subject(s): Biodiesel; CASA; Fecundity; Semen; Spermatozoids; Testicle
Made available in DSpace on 2018-11-26T17:06:40Z (GMT). No. of bitstreams: 0 Previous issue date: 2016-12-01
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Fundacao Araucaria de Apoio ao Desenvolvimento Cientifico e Tecnologico do Parana
The effects of crude glycerin in the diets of male Nile tilapia (Oreochromis niloticus) on growth, seminal and spermatic characteristics, blood parameters, histological aspects of the hepatic and testicular tissue, and on the chemical composition of different organs/tissues were evaluated. For 10 months, the animals were fed diets containing 32% digestible protein (DP), 3200 kcal digestible energy (DE) . kg ration(-1) and five inclusion levels of crude glycerin (0, 4, 8, 12 and 16%). Growth, seminal and spermatic parameters were evaluated, and the plasmatic levels of calcium, triglycerides and glucose were measured. Gonadosomatic, viscerosomatic and hepatosomatic indexes were evaluated and combined with the histological parameters of the testicles and liver. Finally, the centesimal composition of the muscles, testis, liver and viscera were evaluated. The volume of semen released, fecundity, effective fecundity and plasmatic levels of glucose decreased proportionally (p < 0.05) to the increase of glycerin in the diet. The hepatosomatic index increased proportionally (p < 0.05) to the inclusion levels of crude glycerin in the diet. Fish fed on glycerin had the highest protein levels (p < 0.05) in the muscle and testicles. Histological assessment suggests that fish fed the lowest glycerin diet had the highest amounts of spermatozoids in the testicles. Other variables under analysis were not affected by diet (p > 0.05). The results show that, although crude glycerin does not impair growth, any inclusion level in the diet impairs the spermatogenesis process and damages the sperm characteristics of male Nile tilapia. Statement of relevance: Do not use the crude glycerin to the Nile tilapia males. (C) 2016 Elsevier B.V. All rights reserved.
Univ Estadual Oeste Parana UNIOESTE, Rua Fac 645, BR-85903000 Toledo, Parana, Brazil
Univ Estadual Paulista, Ctr Aquicultura, Via Acesso Prof Paulo Donato Castellane S-N, BR-14884900 Jaboticabal, SP, Brazil
Univ Fed Parana, Rua Pioneiro 2153, BR-85950000 Palotina, PR, Brazil
Univ Estadual Londrina, Rodovia Celso Garcia Cid S-N, BR-86057970 Londrina, Parana, Brazil
Univ Estadual Paulista, Ctr Aquicultura, Via Acesso Prof Paulo Donato Castellane S-N, BR-14884900 Jaboticabal, SP, Brazil
CNPq: 485664/2011-9
Fundacao Araucaria de Apoio ao Desenvolvimento Cientifico e Tecnologico do Parana: 15924
