LS 15 PSET4.docx - 1 The presence of the cuckold males did...

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1. The presence of the cuckold males did reduce the nest owners’ egg guarding. From the data provided, the nest owners’ egg guarding was rated as 80 (+,-) 10 when there were no rivals present but when there was a rival present, the nest owners reduced the egg guarding significantly to 52 (+,-) 7. However, the cuckold males’ presence did not alter offspring guarding. From the data, when no rivals were present, the offspring guarding was 90 (+,-) 10 but when rivals were present, the guarding increased to 95 (+,-) 10. From the experiment, you can infer that the nest owners saw the cuckolding males to be a greater risk when the rival males were present thus their paternal certainty became lower which reduced their egg guarding. If they knew that the offspring is genetically related to them, the presence of the rival males would have no effect thus they would not increase their offspring guarding since they have higher paternal certainty which made offspring guarding unchanged. 2. From both experiments, the data provides strong evidence supporting that if the offspring is genetically related to the male bluegill sunfish, then paternal care will increase thus indicating that genetic relatedness matters for parental care for the male bluegill sunfish. It was

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