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- W2083575255 abstract "Abstract Data from a 12‐year field study have allowed us to quantify ‘costs of reproduction’ in a natural population of water pythons ( Liasis fuscus ) in tropical Australia. Both sexes of pythons cease feeding during the reproductive season. For males, this involves fasting for a 6 week period. Adult males lose weight rapidly over this period (approximately 17% of their body mass) but regain condition in the following months, and do not experience reduced survival. In contrast, reproductive adult females cease feeding for 3 months, lose an average of 44% of their body mass over this period, and experience increased mortality. A causal link between reproductive output and reduced female survival is supported by (i) a decrease in survival rates at female maturation; (ii) a correlation between survival rates and frequency of reproduction, in a comparison among different size classes of adult pythons; and (iii) a lowered survival rate for females that allocated more energy to reproduction. Hence, both sexes experience substantial energy costs of reproduction, but a relatively higher energy cost translates into a survival cost only in females. Such non‐linearities in the relationship between energy costs and survival costs may be widespread, and challenge the value of simple energy‐based measures of 'reproductive effort’." @default.
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- W2083575255 date "2000-12-01" @default.
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- W2083575255 title "Energy versus risk: costs of reproduction in free-ranging pythons in tropical Australia" @default.
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- W2083575255 doi "https://doi.org/10.1111/j.1442-9993.2000.tb00073.x" @default.
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