Wplyw wieku samic lisa srebrzystego na ich plodnosc i plennosc

• Autorzy: Kuzniewicz J , Olszewski Z.
• Języki publikacji: PL

Abstrakty

EN

The investigations done in 1989 at the Lubiechów Breeding Farm coverded two years period since 1986 till 1988. The source of informations were: well kept breeding books, farm note books, certificate block and personal observations of the authors. The data obtained are as follow: the year of female fertilization, the number of pups in the litter together with the number of survings pups, the number of males and females in the brood. Under the investigation 607 females of silver fox were taken. The number of its brood was 523. All together within 523 broods 2702 pups was born and 2528 were kept for fruther breeding. From obtained data conclusion as follow are presented: the is an essential relationship between the age females and its reproducibility. Most of the one year old females are sterile, able to abort and to destroy own pups, the age of females has no essential influence on the pregnacy expectancy time.

Słowa kluczowe

PL

zwierzeta futerkowe; zootechnika; plennosc; lisy; plodnosc; lis srebrzysty

• Wydawca: -
• Czasopismo: Zeszyty Naukowe Akademii Rolniczej we Wrocławiu. Zootechnika
• Rocznik: 1992
• Tom: 35
• Opis fizyczny: s.177-183,rys.,tab.,bibliogr.

Twórcy

autor

Kuzniewicz J

• Akademia Rolnicza, Wroclaw

autor

Olszewski Z.

Bibliografia

• [1] Kuźniewicz J.: Zesz. Nauk. AR Wrocław, Zoot. XXIX, 1986, 169-176.
• [2] Kurzawa A., Kuźniewicz J.: Hod. Drobn. Inwen., Warszawa, 5, 1983, 8.
• [3] Maciejowski J.: An. UMCS, Lublin. Sect. 'E. vol. 27, 1972, 359-381.
• [4] Narucka I.: Rocz. AR Poznań, LXXIV, Zoot. 21, 197A, 75-86.
• [5] Ruszczyc Z.: Metodyka doświadczeń zootechnicznych, PWRiL, Warszawa 1978, 256.
• [6] Sklepowicz M., Kuźniewicz J.: Hod. Drobn. Inwen., Warszawa, 3, 1982, 8-9.