Studies of mating behaviour and some factors influencing the sexual response in the male sheepOvis aries

Pepelko, William E.; Clegg, M. T.

doi:10.1016/0003-3472(65)90043-6

Cited by 59 publications

(19 citation statements)

References 7 publications

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“…Rams copulated with the second ewe in 139 of the 150 tests in which they copulated with the first ewe. However, in contrast to the results of Pepelko and Clegg (1965), Bermant et al found a significant reduction in the number of ejaculations attained with the second ewe as compared with the first. Clegg, Beamer, and Bermant (1969) found few consistent effects of introduction of a second female on castrated rams.…”

Section: Sheep (Ovis Aries)mentioning

confidence: 63%

Effects of novelty of copulatory behavior: The Coolidge effect and related phenomena.

Dewsbury

1981

Psychological Bulletin

171

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The degree of novelty of both mating partner and mating situation can be of great importance to the sexual behavior of nonhuman animals under some circumstances. The "Coolidge effect" can be defined as the restoration of mating behavior in males that have reached sexual satiation with one female and show a restoration of mating behavior when the original female is replaced with a novel female. Information on the Coolidge effect has recently been used in extrapolations to human behavior, in attempts to predict monogamy in different species, and in a sociobiological context. The literature on the Coolidge effect is reviewed critically and various complexities and inconsistencies are discussed. Studies conducted utilizing different paradigms, including the Coolidge effect, changes of female prior to satiety, multifemale tests, between-test changes of female, changes of environment, and choice situations, should be consistently differentiated. Results differ as a function of species, paradigm, and testing conditions.

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Section: Sheep (Ovis Aries)mentioning

confidence: 63%

Effects of novelty of copulatory behavior: The Coolidge effect and related phenomena.

Dewsbury

1981

Psychological Bulletin

171

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“…Estrus was assumed to commence halfway between the last negative and first positive observation of estrous behavior. The rams were changed at frequent intervals to reduce variation caused by the male (8,9).…”

Section: Methodsmentioning

confidence: 99%

Action of Exogenous Progesterone and Estrogen on Behavioral Estrus and Luteinizing Hormone Levels in the Ovariectomized Ewe

Scaramuzzi¹,

Tillson²,

et al. 1971

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A series of experiments were conducted which involved the exogenous administration of progesterone and estrogens to 15 ovariectomized ewes. Plasma LH levels were measured by radioimmunoassay and the occurrence of behavioral estrus was determined by vasectomized rams. Injection of estradiol benzoate (EDB) either at 2 or at 16 days after the end of progesterone priming produced 2 effects. Initially, a depression (0-12 hr post injection) of plasma LH, followed by an LH surge (12-24 hr post injection). EDB (50 tig) injected at 2, 8 and 14 days after the end of progesterone priming resulted in typical LH surges to all 3 injections.However, the behavioral responses decreased with repeated injections of EDB. When progesterone was injected simultaneously with EDB on day 2 after the end of progesterone priming, both estrous behavior and the LH surge were totally inhibited but the initial depression in plasma LH was still apparent. These data indicate that estrogens exert both negative and positive actions on LH release from the hypothalamo-hypophyseal system, and that progesterone exerts a block on only the positive action of estrogen. (Endocrinology 88: 1184(Endocrinology 88: , 1971

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“…Also, in rams, the reaction time was restored when a new female stimulus was presented (Pepelko and Clegg, 1965). Therefore, changing the stimulus female found to shorten the sexual reaction time of males of several species (Thiery and Signoret, 1978) and increase in number of mounts which is indicative of high libido.…”

Section: Enhance Male Sexual Performancementioning

confidence: 89%

Biostimulation: Innovative Tool to Improve Reproductive Efficiency in Farm Animals

Kerketta¹,

Singh²,

Sahu³

et al. 2017

Int. J. Livest. Res.

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Studies of mating behaviour and some factors influencing the sexual response in the male sheepOvis aries

Cited by 59 publications

References 7 publications

Effects of novelty of copulatory behavior: The Coolidge effect and related phenomena.

Effects of novelty of copulatory behavior: The Coolidge effect and related phenomena.

Action of Exogenous Progesterone and Estrogen on Behavioral Estrus and Luteinizing Hormone Levels in the Ovariectomized Ewe

Biostimulation: Innovative Tool to Improve Reproductive Efficiency in Farm Animals

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