PSYCH 3T03 Study Guide - Final Guide: Prothonotary, Subantarctic Fur Seal, Advantageous
17 Apr 2018
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One answer to this question is that the time, energy, and resources that parents devote to their o spring have costs, including reduced fecundity in the future and fewer opportunities to mate in the present. Moreover, because the costs of parental care are often greater than the costs of maternal care, particularly in polygynous species, paternal care is rarer than maternal care. How does a parental bird balance bene ts of feeding o spring (i. e. increasing reproductive success) with costs of leaving the nest (i. e. giving away nest location to predators and making themselves vulnerable as well): depends on . Nature of predator (whether it consumes adults or o spring) Annual mortality rate for breeding adults: birds with low mortality rates will exhibit less risk as they are likely to reproduce in future, birds with high mortality rates should be more concerned with needs of nestlings, e. g. North american birds have shorter lifespans and produce larger clutches than.
