Reproductive Costs

Robbins, Charles T.

doi:10.1016/b978-0-12-589382-4.50016-1

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2001

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“…Flowering and fruition around this region occur during the rainy season [28]. Food resources are closely linked to reproductive success [19]. Thus, sun bear gestation might be associated with the rainy season, at which time high food availability would contribute to increased nutritional needs.…”

Section: Discussionmentioning

confidence: 99%

Reproductive Pattern of the Sun Bear(Helarctos malayanus) in Sarawak, Malaysia.

2001

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ABSTRACT. Fecal progesterone assays were conducted in 3 captive female sun bears (Helarctos malayanus) segregated from males to characterize the species-specific reproductive pattern in their original distribution area in Sarawak, Malaysia. Peaks of fecal progesterone concentrations were observed once annually, and lactation was observed after increasing progesterone concentrations in all females without mating stimulus. These results suggest that sun bears in Sarawak, Malaysia, may have a seasonal reproductive pattern and ovulation was noted to occur spontaneously, followed by pseudopregnancy.KEY WORDS: Helarctos malayanus, ovulation, pseudopregnancy, seasonality, sun bear.

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Section: Discussionmentioning

confidence: 99%