Physiological and reproductive correlates of behavioral strategies in femaledomestic pigs
Article Abstract:
The different ways of responding to the stress of social mixing is investigated in pigs. The mixing of female pigs into a group of unfamiliar individuals yielded three categories. The first group (High Success)can displace as many pigs they can, and the second group (No Success) is alwaysinactive and can never displace another pig. The third group (Low Success) can displace other pigs, but are more often displaced themselves. Results show thatthe amount of success achieved is highly correlated with body weight, and subsequent weight of offsprings. Therefore, agonistic achievements is importantin terms of physiology and reproduction.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 1992
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Studying birth sex ratio in domestic pigs
Article Abstract:
Douglas B. Meikle, Stephen H. Vessey and Lee C. Drickamer's comments on the evaluation of adaptive adjustment to secondary sex ratio in domestic swine cannot be proven by the experimental protocol used in the study. Maternal dominance rank does not affect reproduction because males emigrate from their natal group. Furthermore, nutritional state was a good indicator of an animal's condition because undernourished mothers produced more males than females.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 1997
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Multiple mechanisms may affect birth sex ratio in domestic pigs
Article Abstract:
Some of the views of William H. James regarding the multiple mechanisms that may affect birth sex ratio in the pig, Sus Scrofa, invite comment. The direct correlation of hormone levels with variation in pig litter sex ratios should also associate social status effect phenomenon with birth sex ratio. Moreover, the limited availability of sperm at the fertilization site contradicts fluctuations in hormones and variations during the contraception period.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 1998
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