Íslenskar landbúnaðarrannsóknir - 01.03.1977, Side 90

Íslenskar landbúnaðarrannsóknir - 01.03.1977, Side 90
88 ÍSLENZKAR LANDBÚNAÐARRANNSÓKNIR REFERENCES Aðalsteinsson, Stefán, 1970. Colour inheritance in Icelandic sheep and relation between colour fer- tility and fertilization. J. Agric. Res. Icel. 2: 3—135. Aðalsteinsson, Stefán and Hattgrímsson, Sveinn, 1977. Inherited fertility depression in Icelandic sheep. J. Agric. Res. Icel. 9, 1: 76—80. Biegert, K., 1939. Untersuchungen iiber die Zwil- lingsfrachtigkeit bei dem deutchon veredelten Landschaft (Wurttemberger) unter besonderes Beruchsichtigung der Hohenheimer Hamherde. Z. Tierz. Zucht Biol., 42: 215—258. Demster, E. R. and Lerner, I. M., 1950. Herita- bility of threshold characters. Genetics. 35: 212 —236. Edey, T. N., 1969. Prenatal mortality in sheep. A review. A.B.A. 37: 173—190. Edgar, D. G., 1958. The induction of ovulation and oestrus in ewes during anoestrus. Proc. N. Z. Soc. Anim. Prod. 18: 97. Hallgrímsson, Sveinn, 1966. Innvirkning av noen factorer pá fruktbarhet hos sau (Some faaors affecting fertility in Icelandic sheep). Thesis Vollebekk, Norway 1966, 73 pp. Hattgrímsson, Sveinn, 1973. Starfsemi fjárræktar- félaganna. Freyr 68: 80—84. Heape, W., 1899. Agordian, Carvenness and ferti- lity in sheep. Roy. Agric. Soc. Engl. Ser. 3, 10: 217—248. Hulet, C. V. and Ercanbrack, S. K., 1962. A ferti- lity index for rams. Anim. Sci. 21: 489. Hulet, C. V., Warren, C. F. and Blackwell, L. R., 1965. Relationship of semen quality and ferti- lity in the ram on fecundity in the ewe. Reprod. Fertil. G: 311—315. Lax, F. and Brown, G. H., 1968. The influence of maternal handicap, inbreeding and ewes body weight at 15—16 months of age on re- production rate in Australian Merinos. Aust. J. Agric. Res. 19: 442—443. Morley, F. H. W., 1954. A new unusual faaor in Australian Merino sheep. Aust. Vet. 30: 237— 240. Purser, A. F., 1965. Repeatability and heritability of fertility in hill sheep. Anim. Prod. 7: 75— 82. Terrill, C. E., 1937. Measurement of reproduaive capacity as an aid in seleaion of rams of high fertility. Proc. Am. Soc. Anim. Prod. 1937: 311—316. Young, S. S. Y., Turner, H. N. and Dolling, C. H. S., 1963. Selection for fertility in Australian Merino sheep. Aust. J. Agric. Res. 14: 460— 486. Webster, W. M., 1952. Infertility in rams, Proc. N. Z. Soc. Anim. Prod. 11: 62—78. Wiggins, E. L., Terrill, C. E. and Emik, L. O., 1953. Relationship between libido, semen characterisics and fertility in range rams. J. Anim. Sci. 12: 684—696.

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