A comparative analysis of senescence in adult damselflies and dragonflies (Odonata)

摘要: Any population whose members are subject to extrinsic mortality should exhibit an increase in with age. Nevertheless, the prevailing opinion is that populations of adult damselflies and dragonflies do not such senescence. Here, we challenge this contention by fitting a range demographic models data on which these earlier conclusions were based. We show model exponential age-related (Gompertz) generally provides more parsimonious fit than alternative including age-independent mortality, indicating many odonates indeed senesce. Controlling for phylogeny, comparison daily 35 odonate species indicates although male female mortalities positively correlated, tends be higher males those territoriality. Hence, first time territoriality may impose survivorship cost males, once underlying phylogenetic relationships accounted for.