Providing parental care is potentially costly. Costs can arise through elevated energy expenditure or from an increased risk of mortality. A cost of parental care can also occur because a parent is compromised in their ability to forage. We used pumpkinseed Lepomis gibbosus, a fish with an alternative male mating strategy, to test whether parental males differed in their feeding in comparison with females and cuckolder males. To address this question, we examined the stomach contents of female, cuckolder male, and parental male pumpkinseed during the breeding season over an entire diel cycle. We showed that parental males had a lower total weight of food in their stomachs in comparison with females, while cuckolder males did not. Parental males also had a lower weight and number of chironomids in their stomachs. The temporal pattern of feeding of parental males diverged from that of females, and they had a lower probability of pupal chironomids in their stomachs, which implies spatial segregation in foraging. Parental males had a greater probability of conspecific eggs in their stomachs than females, while the probability of egg cannibalism did not differ between cuckolder males and females. Overall, these finding meet predictions in accordance with an assumption that parental care and territoriality can compromise feeding.

Department of Ecology and Vertebrate Zoology University of Łódź Banacha 12 16 90 237 Łódź Poland

Department of Ecology and Vertebrate Zoology University of Łódź Banacha 12 16 90 237 Łódź Poland Institute of Vertebrate Biology Academy of Sciences of the Czech Republic Květná 8 603 65 Brno Czech Republic School of Biology and Bell Pettigrew Museum of Natural History University of St Andrews St Andrews KY16 8LB UK

Environmental and Life Sciences Graduate Program Trent University Peterborough ON K9J 7B8 Canada

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