Early Reproductive Failure in Ewes in a Tropical Environment*

Extraversion, Neuroticism and Academic Attainment in Uganda

“…This is perhaps not surprising since universities tend to use similar teaching methods and university students tend to be the most intelligent of their age group. With school children, however, Entwistle (1972) in his extensive review found no crosscultural investigations.…”

“…and Entwistle (1972) have both attempted to organise the chaos of findings relating personality variables and academic attainment. Generally, a t primary school and during the first stages of secondary school stable extraverts have the advantage.…”

“…Later, introverts, possibly the more unstable ones, do better. Entwistle (1972) has shown, however, that there are interactions with the sex and ability of the pupil, and the type of subjects studied, as well as with geographic area, classroom organisation and size, and teaching methods ! Cross-cultural studies, where many of the interacting variables are radically different, can examine how robust is the pattern of relationships found in the Western culture.…”

Ram fertility and fertilization rates in the ewe in a semi-arid tropical environment

“…E a r l i e r work in this environment (Mottle, 1956(Mottle, , 1966 indicated that approximately one third of ewes which mated failed to lamb, and subsequent studies by Entwistle (1970Entwistle ( , 1972 have shown that failure of fertilization is the m a j o r source of early r eproductive wastage in the region. E a r l i e r work in this environment (Mottle, 1956(Mottle, , 1966 indicated that approximately one third of ewes which mated failed to lamb, and subsequent studies by Entwistle (1970Entwistle ( , 1972 have shown that failure of fertilization is the m a j o r source of early r eproductive wastage in the region.…”

“…The detrimental effects of high ambient t e m p e r a t u r e s on r a m fertility a r e now well recognised (reviewed by Moule, 1970) and field observations in tropical inland Australia (Entwistle, 1972) have suggested that heat induced r a m infertility may be a contributing factor to low fertilization rates, and lowered fertility of ewes in the region.…”