Sixty pre-pubertal Yaffa breeder cocks of about 16 weeks old were used to evaluate the reproductive effect of fumonisin B1(FB1), a toxic secondary metabolite of Fusarium verticillioides on pubertal age, tubular diameter and volumetric proportions of spermatogenic elements. The cocks were randomly allotted to diets containing 0.2(control), 5.2, 10.2 and 15.2ppmFB1 in a 16-weeks feeding trial. At week 22, semen collection was conducted at 48hours interval until the ages at puberty of the cocks were established. At the end of the experiment, half of the right testis of each cock was removed and processed histologically for evaluation of diameter of seminiferous tubules and volumetric proportions of testicular elements. Results showed that cocks that were fed diets containing 0.2, 5.2 and 10.2ppmFB1 attained puberty two and half (21/2) weeks earlier than cocks that were fed 15.2ppmFB1. Tubular diameter (130.78µm) of cocks that were fed 0.2ppmFB1 was significantly (P <0.05) superior to the diameter of 107.38, 104.05 and 103.10µm obtained from cocks that were fed 5.2, 10.2 and 15.2ppmFB1 respectively. Spermatogonia A and B of cocks that were fed 0.2 and 5.2ppm FB1 were significantly higher than those of cocks fed 10.2 and 15.2ppmFB1. Round spermatids, sertoli cells and lumen of cocks fed 15.2ppmFB1 were significantly impaired. The proportions of basement membrane and cytoplasm in the testes of cocks fed 15.2ppmFB1 were significantly higher suggesting an impairment of spermatogenic element in the cocks. This study revealed that exposure of cocks to be used for breeding purpose to dietary FB1 higher than 10.2ppm will impede the reproductive efficiency of the cocks.
Ogunlade Jacob Taiwo,
Response of Yaffa Breeder Cocks to Dietary Fumonisin B1: Volumetric Proportions of Spermatogenic Elements, Tubular Diameter and Pubertal Age, Animal and Veterinary Sciences.
Vol. 7, No. 2,
2019, pp. 46-51.
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