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Male reproductive strategy explains spatiotemporal segregation in brown bears.

Steyaert SM, Kindberg J, Swenson JE, Zedrosser A - J Anim Ecol (2013)

Bottom Line: NPI can be a foraging strategy, a strategy to reduce competition, or a male reproductive strategy.We found that spatiotemporal segregation was strongest between females with cubs-of-the-year and adult males during the mating season.In species exhibiting NPI as a male reproductive strategy, female avoidance of infanticidal males is probably more common than observed or reported, and may come with a fitness cost if females trade safety for optimal resources.

View Article: PubMed Central - PubMed

Affiliation: Institute of Wildlife Biology and Game Management, University of Natural Resources and Life Sciences, Vienna, A-1180, Austria; Department of Ecology and Natural Resource Management, Norwegian University of Life Sciences, Ås, NO-1432, Norway.

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Diurnal and seasonal responses of brown bears to the Normalized Difference Vegetation Index (NDVI). Parameter estimates and their 95% highest posterior density intervals are shown for adult males (≥5 years, •), adult lone female (≥5 years, ) and females with cubs-of-the-year (x), during eight 3-h time intervals during the mating and postmating seasons in central Sweden during 2006–2010.
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fig03: Diurnal and seasonal responses of brown bears to the Normalized Difference Vegetation Index (NDVI). Parameter estimates and their 95% highest posterior density intervals are shown for adult males (≥5 years, •), adult lone female (≥5 years, ) and females with cubs-of-the-year (x), during eight 3-h time intervals during the mating and postmating seasons in central Sweden during 2006–2010.

Mentions: NDVI – Adult males and lone females showed a bell-shaped diurnal trend in their selection of areas with high NDVI values, peaking at midday during both seasons (Fig. 3). Females/cubs did not show this pattern during the mating season and parameter estimates for NDVI values were generally lower than for the other reproductive classes. The response to NDVI was similar among reproductive classes during the postmating season (Fig. 3).


Male reproductive strategy explains spatiotemporal segregation in brown bears.

Steyaert SM, Kindberg J, Swenson JE, Zedrosser A - J Anim Ecol (2013)

Diurnal and seasonal responses of brown bears to the Normalized Difference Vegetation Index (NDVI). Parameter estimates and their 95% highest posterior density intervals are shown for adult males (≥5 years, •), adult lone female (≥5 years, ) and females with cubs-of-the-year (x), during eight 3-h time intervals during the mating and postmating seasons in central Sweden during 2006–2010.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3757318&req=5

fig03: Diurnal and seasonal responses of brown bears to the Normalized Difference Vegetation Index (NDVI). Parameter estimates and their 95% highest posterior density intervals are shown for adult males (≥5 years, •), adult lone female (≥5 years, ) and females with cubs-of-the-year (x), during eight 3-h time intervals during the mating and postmating seasons in central Sweden during 2006–2010.
Mentions: NDVI – Adult males and lone females showed a bell-shaped diurnal trend in their selection of areas with high NDVI values, peaking at midday during both seasons (Fig. 3). Females/cubs did not show this pattern during the mating season and parameter estimates for NDVI values were generally lower than for the other reproductive classes. The response to NDVI was similar among reproductive classes during the postmating season (Fig. 3).

Bottom Line: NPI can be a foraging strategy, a strategy to reduce competition, or a male reproductive strategy.We found that spatiotemporal segregation was strongest between females with cubs-of-the-year and adult males during the mating season.In species exhibiting NPI as a male reproductive strategy, female avoidance of infanticidal males is probably more common than observed or reported, and may come with a fitness cost if females trade safety for optimal resources.

View Article: PubMed Central - PubMed

Affiliation: Institute of Wildlife Biology and Game Management, University of Natural Resources and Life Sciences, Vienna, A-1180, Austria; Department of Ecology and Natural Resource Management, Norwegian University of Life Sciences, Ås, NO-1432, Norway.

Show MeSH
Related in: MedlinePlus