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Abstract

This paper discusses the development of extenders and techniques for the protection of bird semen during semen preservation. The biochemical mechanisms that influence avian spermatozoa and their relationship with sperm motility are also examined. The effects of different pH levels and diluent...

Author(s)
Atanasov, V.
Publisher
National Centre for Agrarian Sciences in Bulgaria, Sofia, Bulgaria
Citation
Zhivotnov'dni Nauki, 2008, 45, 1, pp 90-102
Abstract

The ecological OVOCAP preparation based on natural capsaicin was applied per os to the wild duck (Anas platyrrynchos) following a strict scheme. Anas platyrrynchos is simultaneously a migratory and permanently settled bird in Bulgaria and its number to some extent depends on its artificial...

Author(s)
Kitanov, I.; Tjufekchiev, K.; Poljakov, D.
Publisher
Agricultural Academy, Sofia, Bulgaria
Citation
Zhivotnov'dni Nauki, 2010, 47, 3, pp 28-32
Abstract

The efficiency of artificial insemination was examined in Hubbard and Lohmann Brown hens. Fertilization of eggs was 79.94 and 75.36%, hatchability from fertilized eggs was 88.61 and 93.05% and total embryonic mortality was 6.92 and 4.37% for two breeds, respectively. Sex ratio was 4.76-5.25...

Author(s)
Dimitrov, S.; Atanasova, T.
Publisher
National Centre for Agrarian Sciences in Bulgaria, Sofia, Bulgaria
Citation
Zhivotnov"dni Nauki, 2001, 38, 2, pp 17-19
Abstract

The study was conducted to determine the microbial contamination of semen of Muscovy drakes which were used for artificial insemination. In the microbiological tests, it was observed that 12.50% of the ejaculates obtained were sterile, 43.75% were contaminated to the extent of 1000 mt/ml, 25.00% -...

Author(s)
Sabev, M.; Gersilov, V.; Nikolov, I.
Publisher
National Centre for Agrarian Sciences in Bulgaria, Sofia, Bulgaria
Citation
Zhivotnov'dni Nauki, 2004, 41, 2, pp 25-27
Abstract

A review, with many references, of the history of developing semen diluents suitable form various poultry species and including ostriches, starting with the Beltsville poultry semen extender by Sexton and Fewlass in 1978, up to Dass et al. in 2003.Then, biochemical mechanisms of the effects on...

Author(s)
Atanasov, V.
Publisher
National Centre for Agrarian Sciences in Bulgaria, Sofia, Bulgaria
Citation
Zhivotnov'dni Nauki, 2007, 44, 2, pp 73-83
Abstract

Due to economic decline in Bulgaria, poultry meat production declined between 1989 and 1998 from 188 500 tonnes annually to 107 000 tonnes, and egg production from 2873 million to 1689 million. Poultry meat consumption per head of population decreased from 18.4 to 8.2 kg, and egg consumption from...

Author(s)
Bakalivanova, T.; Chichibaba, B.
Publisher
National Centre for Agrarian Sciences in Bulgaria, Sofia, Bulgaria
Citation
Zhivotnov"dni Nauki, 2001, 38, 1, pp 35-37
Abstract

251 ejaculates were obtained by massage. Groups of 4-5 toms were used at a time, and the semen was pooled. Doses of 0.05 ml undiluted or 0.1 ml diluted semen were inseminated. The 2 methods of insemination resulted in 78.52 and 75.94% fertilization resp.

Author(s)
ZAGORSKI, D.; ZAHARIEV, Z.; GEORGIEV, G.; TASEV, A.
Citation
Veterinarna Sbirka, 1971, 68, 3, pp 27-30
Abstract

Artificial insemination was used to carry out hybridization between domestic fowls (10 White Leghorn, WL, hens or 3 New Hampshire, NH, cocks), and turkeys (5 ♀ and 2 ♂ Imperial White (IW)), guineafowls (7 ♀ and 3 ♂) and pheasants (7 ♀ and 3 ♂). For 56 turkey eggs (IW ♀♀ inseminated with NH semen),...

Author(s)
Tanchev, S.; Vasileva, Ihacek˜.; Khristov, A.; Kabakchiev, M.
Citation
Genetika i Selektsiya, 1987, 20, 1, pp 72-76
Abstract

Data were obtained on 20 ♂ and 600 ♀ Bronze and Imperial White turkeys in 1968 and on 10 ♂♂ and 300 ♀♀ in 1969. Semen was collected twice a week. In 688 ejaculates, volume averaged 0.28 ml, concentration of spermatozoa 3450 x 109/ml, sperm resistance 29.9 x 103 ml of 1% NaCl, and pH 7.4. In 4023...

Author(s)
NEDYALKOV, K.; STOYANOVA, M.; GANCHEV, L.
Citation
Veterinarnomeditsinski Nauki, 1971, 8, 5, pp 67-72
Abstract

866 ejaculates were obtained by massage and vacuum collector from 30 local Bronze ♂♂ Ejaculate volume averaged 0.166 cm*, sperm motility 86.6%, concentration 4332 × 106 spermatozoa/cm3, survival time at 39° C 340 min, and methylene blue reduction time 5.20 min per 1 × 109 spermatozoa. The use of...

Author(s)
ZAGORSKI, D.; KALEV, G.; ZAKHAR-IEV, Z.; GEORGIEV, G.
Publisher
Inst. Biol. Pathol. Reprod., Sofia.,
Citation
Veterinarnomeditsinski Nauki, 1970, 7, 2, pp 91-99

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