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Article
David Jenkins, Auteur ; Tim H. Sparks, AuteurCapsule Marked changes were observed in the spring phenology of birds and were more apparent in residents and short-distance migrants than in trans-Mediterranean migrants. Aims To examine changes in first songs and arrivals of birds in northeast[...]
Article
David Jenkins ; A. Watson 1967Finnish Game Research, 30
Article
David Jenkins ; Adam Watson ; G. R. Miller 1967Journal of Animal Ecology, 36(1)[1. Population studies on red grouse at Kerloch gave results similar to Glen Esk (Jenkins et al. 1963), except that breeding stocks at Kerloch did not change greatly from year to year. 2. Breeding birds took territories in autumn, and expelled n[...]
Article
G.R. Miller ; David Jenkins ; Adam Watson 1966Journal of Applied Ecology, 3(2)[1. The breeding densities and breeding success of red grouse were compared with the performance of their main food plant, heather, at seventeen study areas of 93-194 ha in north-east Scotland in 1959-61. 2. Heather performance was assessed each[...]
Article
David Jenkins ; Adam Watson ; G. R. Miller 1964Journal of Applied Ecology, 1(1)[1. The object of the paper is to assess the importance of predation on red grouse numbers on two study areas in north-east Scotland, where we counted live grouse and found the bodies of nearly all those killed by predators. 2. The abundance of [...]
Rapport
Article
David Jenkins ; Adam Watson ; G. R. Miller 1963Journal of Animal Ecology, 32(3)1. This paper describes the results of a five-year population study of red grouse on selected study areas in north-east Scotland, chiefly on two study areas of 460 and 405 ha, but also on smaller areas elsewhere. 2. Counting the grouse, many of [...]
