de Oliveira Marinez Moraes, Ribeiro Tainá, Orlando Tamira Maria, de Oliveira Dênio Garcia Silva, Drumond Mariana Martins, de Freitas Rilke Tadeu Fonseca, Rosa Priscila Vieira
Department of Veterinary Medicine, Federal University of Lavras, Mailbox 3037, Lavras, Minas Gerais 37200-000, Brazil.
Department of Veterinary Medicine, Federal University of Lavras, Mailbox 3037, Lavras, Minas Gerais 37200-000, Brazil.
Anim Reprod Sci. 2014 Nov 10;150(1-2):62-9. doi: 10.1016/j.anireprosci.2014.08.006. Epub 2014 Aug 29.
The goal of the present work was to study the reproductive performance of Nile Tilapia (Oreochromis niloticus) female broodstock fed diets containing different levels of crude protein (CP). Two hundred and forty Nile tilapia (O. niloticus) were used at an average age of 30 months, with 180 females and 60 males. The broodstock were lodged separately in masonry tanks with continuous water flow. The females were stocked in thirty tanks with dimensions of 8 m(3) in a completely randomized design consisting of five treatments and six replications. The treatments consisted of five diets with different levels of CP (32, 34, 36, 38 and 40%) and with digestible energy per gram of protein of 9.5 kg of feed. The crude protein (CP) levels positively influenced (p<0.05) reproductive parameters (female relative and absolute fecundity, egg diameter, fasting larvae survival capacity), the somatic indexes (gonadosomatic (GSI), hepatosomatic (HIS), viscerosomatic (VSI)), total plasma protein, albumin and triglycerides. There were no significant differences (p>0.05) observed with regard to spawning weight and female weight. The reproductive parameters studied in the present research indicate that diets formulated with 38% CP with digestible energy per gram of CP of 9.5 were the best diets for tilapia females during the reproductive period.
本研究的目的是探究投喂不同粗蛋白（CP）水平日粮的尼罗罗非鱼（Oreochromis niloticus）雌鱼亲鱼的繁殖性能。实验使用了240尾尼罗罗非鱼，平均年龄为30个月，其中雌鱼180尾，雄鱼60尾。亲鱼分别饲养在有持续水流的砖石池中。雌鱼被放养在30个容积为8立方米的水池中，采用完全随机设计，包含五个处理组，每组六个重复。处理组由五种不同CP水平（32%、34%、36%、38%和40%）的日粮组成，每克蛋白质的可消化能量为9.5千卡饲料。粗蛋白（CP）水平对繁殖参数（雌鱼相对和绝对繁殖力、卵径、空腹幼体存活能力）、躯体指数（性腺指数（GSI）、肝体指数（HIS）、脏体指数（VSI））、总血浆蛋白、白蛋白和甘油三酯产生了积极影响（p<0.05）。在产卵重量和雌鱼体重方面未观察到显著差异（p>0.05）。本研究中所研究的繁殖参数表明，CP含量为38%且每克CP可消化能量为9.5千卡的日粮是尼罗罗非鱼雌鱼繁殖期的最佳日粮。
