Effect of Frequency of Ejaculation on Semen Characteristics in Two Breeds of Turkeys (Meleagris gallopavo) Raised in a Tropical Environment
TL;DR: Semen collection in turkeys is more favourable when harvested once per week since semen concentration declines progressively with increase in the ejaculation frequency.
Abstract: A study was carried out at the Abubakar Tafawa Balewa University Farm, Bauchi (February - May, 2002) to investigate the effect of frequency of ejaculation (once, twice and thrice per week) on semen traits in exotic and local turkeys. The results showed that ejaculate volume, live spermatozoa, abnormal spermatozoa, sperm concentration and total sperm per ejaculate were significantly (P<0.05) higher in exotic than local turkeys, values being 0.32±0.02 vs 0.17±0.02ml, 83.83±1.33 vs 80.67±1.33%, 11.19±0.73 vs 13.61±0.73%, 4.66±70.73 vs 2.81±74.93 x 10 and 97.72±9.86 vs 50.81±10.45 x 10 . It was also shown that 9 9 sperm concentration was the only variable significantly affected (P<0.05) by frequency of ejaculation. The interaction of breeds and frequency of ejaculation also favoured (P<0.05) the exotic breed at lower frequency of ejaculation. Semen collection in turkeys is more favourable when harvested once per week since semen concentration declines progressively with increase in the ejaculation frequency. The exotic have superior genetic make-up than the local turkeys in terms of their reproductive potential.
Citations
More filters
01 Jan 2011
TL;DR: From the work, it is evident that metabolizable substrates containing coconut milk and other diluents used proved efficient and would enhance turkey semen preservation and artificial insemination practice in the authors' local environment.
Abstract: An investigation was conducted with a total of one hundred and fifty (150) semen samples collected randomly from six (6) toms and one thousand three hundred and fifty eggs (1350) from forty-five (45) hens to evaluate the effect of diluents, age of semen and insemination doses on viability and fertility of turkey semen preserved at ambient temperature. Results of the work revealed that the semen qualities of those toms used for the work were not statistically different (P>0.05). The rate of semen survival per hour shows that in diluent (DIII) containing coconut milk a highly significant difference (P<0.01) in rates of survival of sperm during the 8 hour period was observed. Other diluents preserved sperm for a reasonable period of time, diluent (D0) lasted for 4 hrs, DI lasted for 5 hrs whereas DII also sustained survival of sperm for above 6 hrs before the sharp decline. The level of fertility recorded in all the diluents using different dosages showed that diluent D0 containing 0.2ml recorded the highest yield. The overall result in this case showed a highly significant difference (P<0.01). In the aspect of hatchability, diluent DI produced the highest number of chicks valued 63.48+8.27% .Significantly higher (P<0.01) hatch of fertile eggs and eggs set was obtained from hens inseminated with semen diluted in DIII than other diluents. From the work, it is evident that metabolizable substrates containing coconut milk and other diluents used proved efficient. The results show that careful improvement and utilization of those local and affordable diluents would enhance turkey semen preservation and artificial insemination practice in our local environment.
1 citations
TL;DR: In this paper , the variance in semen quality and compared it with some characteristics of the semen of other local breeds were compared at 60 weeks of age, and the results showed that the white and striped breeds significantly outperformed the black breed (P≤0.05) in the proportion of stay sperms.
Abstract: The Iraqi local chicken is national wealth, so it is necessary to work on increasing knowledge of its fertilization capabilities. The current research aims to identify the local breeds that have fertility characteristics by studying the variance in semen quality and comparing it with some characteristics of the semen of other local breeds. Replicates of white breeds W, Black B, and striped BW were adopted at 60 weeks of age. Semen values according to the characteristics of colour, the volume of semen, number and concentration of sperm, percentage of abnormalities, live and dead sperm, and individual and collective motility. Semen colour for all breeds was pearly white, and there had been no big differences in the characteristics of semen size, sperm count, concentration, individual and collective motility, and percentage of dead sperm. While, the white and striped breeds significantly outperformed the black breed (P≤0.05) in the proportion of stay sperms. Black breed significantly outperformed the rest of the study breeds in the percentage of sperm abnormalities, as it turned out that the study breeds had good fertility characteristics compared to other local breeds.
References
More filters
Book•
01 Jan 1974
TL;DR: Reproduction in farm animals, Reproduction in farming animals, مرکز فناوری اطلاعات و اشاوρزی .
Abstract: Reproduction in farm animals , Reproduction in farm animals , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی
1,211 citations
"Effect of Frequency of Ejaculation ..." refers background or methods in this paper
...Seminal traits with respect to volume, concentration, motility, live and abnormal spermatozoa and total spermatozoa were evaluated as per the procedures laid down by Butswat (1994) and Hafez (1995)....
[...]
...Spermatozoal abnormalities in the two breeds were lower than the 20% reported by Hafez (1995)....
[...]
Book•
01 Jan 1990
TL;DR: This paper presents new directions in Poultry Genetics, focusing on quantitative and qualitative Genetics of plumage, skin and eye pigmentation in chickens, and Quantitative Genetics and Selection of growth and meat production in chickens.
Abstract: Foreword. Part I. Poultry Biology. Origin and history of poultry species (R.D. Crawford). Poultry genetic resources: evolution, diversity and conservation (R.D. Crawford). Reproductive biology in relation to breeding and genetics (H.P. Van Krey). Preservation of avian cells (M.R. Bakst). II. Qualitative Genetics. Genetics of plumage, skin and eye pigmentation in chickens (J.R. Smyth, Jr.). Mutations and major variants of plumage and skin in chickens (R.G. Somes, Jr.). Mutations and major variants of muscles and skeleton in chickens (R.G. Somes, Jr.). Genetics of biochemical variants in chickens (A.A. Grunder). Mutations and major variants of the nervous system in chickens (R.D. Crawford). Mutations and major variants of other body systems in chickens (R.G. Somes, Jr. et al.). Lethal mutant traits in chickens (R.G. Somes, Jr.). Mutations and major variants in turkeys (T.F. Savage). Mutations and major variants in Japanese quail (K.M. Cheng, M. Kimura). Mutations and major variants in guinea fowl (R.G. Somes, Jr.). Mutations and major variants in ring-necked pheasants (R.G. Somes, Jr.). Mutations and major variants in domestic ducks (F.M. Lancaster). Mutations and major variants in muscovy ducks (C. Fedeli Avanzi, R.D. Crawford). Mutations and major variants in geese (R.O. Hawes). Cytology and cytogenetics (J.J. Bitgood, R.N. Shoffner). Pleiotropic and associated effects of major genes (P. Merat). Linkage relationships and gene mapping (J.J. Bitgood, R.G. Somes, Jr.). III. New Directions in Poultry Genetics. Immunogenetics (S.J. Lamont, R.R. Dietert). Molecular genetics (G. Bulfield). Genetic engineering (R.M. Shuman). IV. Quantitative Genetics and Selection. Genetics of growth and meat production in chickens (J.R. Chambers). Genetics of growth and meat production in turkeys (E.G. Buss). Genetics of growth and meat production in other galliforms (H.L. Marks). Genetics of growth and meat production in waterfowl (H. Pingel). Genetics of egg production in chickens (R.W. Fairfull, R.S. Gowe). Genetics of egg production in other galliforms (H.L. Marks). Genetics of egg production and reproduction in waterfowl (H. Pingel). Genetic variation in egg composition (K.W. Washburn). Disease genetics (J.S. Gavora). Nutritional genetics (R.A.E. Pym). Behavioral genetics (P.B. Siegel, E.A. Dunnington). Genotype x environment interactions (A.K. Sheridan). Heterosis (R.W. Fairfull). Genetic controls in selection (R.S. Gowe, R.W. Fairfull). Inbreeding (H. Abplanalp). V. Applied Breeding and Selection. Industrial breeding and selection (P. Hunton). Breeding and selection by poultry fanciers (W.C. Carefoot). Breeding and selection programs in developing countries (T.K. Mukherjee). Author Index. Subject Index.
413 citations
97 citations
01 Jan 1972
43 citations