Parameters [of] fecundity in partridge
2006
Maletic, V., Sumarski fakultet, Skopje (The Former Yugoslav Republic of Macedonia)
The aim of the investigation was to clear one of a population dynamic factor which directly influences on the real periodical increase. This is a breeding coefficient, i.e. ratio between the number of pairs which had successfully brought raising generation and a number of separated pairs in spring. On the basis of a number of partridges within the flock in fall populations, a successful pair increase, i.e. a number of current year individuals was determined. For this purpose, during several years, on the typical localities for partridge survival in the R. of Macedonia, by the visual-marchroute method we executed an inventarisation of the number of partridges during two periods of the year (March 1-10, and October 1-10). In the frame of the experimental field, with a surface from 411 to 443 ha, various cultures participated, proportionally to their presence in the investigated fields. The breeding coefficient value varies from 0.31 to 0.68, while the average increase of successful pair counts 7.81 individuals.
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
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