Review Work
According to Kollinker and Richner’s article, Naviagation in a cup: chick positioning in a great tit, Parus major, nests, “the angle between male and female feeding position varies across nests between 0 degrees and 180 degrees and the individual feeding location of each parent appears to be stable over the nestling period”. This situation creates a source of contention between siblings over food. If a parent provides food from the same position in the nest, there is only one advantageous feeding site for the siblings to compete for but if both parents feed at different positions in the nest, then there are two ideal sites, which cuts the offspring profitability in half. If both parents chose to sit in two locations relatively …show more content…
“Constraints resulting from complex interactions between prey size, energy demands and foraging efficiency, which lead to no adaptive mortality of small nestling.” (Slagsvold, p. 692). According to the feeding constraint hypothesis, younger offspring are only able to digest little and mushy food sources where the older and larger siblings require bigger prey for survival. Therefore parents are more likely to catch bigger prey, outweighing the benefits versus the costs of catching a certain size of a prey for their offspring. Slavsgold and Wiebe hypothesized there won’t be a difference in the range of prey sizez brought to the asynchronous nest compared to synchronous nests. This would decrease the younger’s offspring growth rate as well as it’s chance of survival. If the parents are purposely not feeding the younger siblings, they won’t even try to transfer the food to them. If the parents are trying to feed the younger siblings and are unsuccessful, the larger siblings will be given the prey showing that the feeding constraint hypothesis is
According to Kollinker and Richner’s article, Naviagation in a cup: chick positioning in a great tit, Parus major, nests, “the angle between male and female feeding position varies across nests between 0 degrees and 180 degrees and the individual feeding location of each parent appears to be stable over the nestling period”. This situation creates a source of contention between siblings over food. If a parent provides food from the same position in the nest, there is only one advantageous feeding site for the siblings to compete for but if both parents feed at different positions in the nest, then there are two ideal sites, which cuts the offspring profitability in half. If both parents chose to sit in two locations relatively …show more content…
“Constraints resulting from complex interactions between prey size, energy demands and foraging efficiency, which lead to no adaptive mortality of small nestling.” (Slagsvold, p. 692). According to the feeding constraint hypothesis, younger offspring are only able to digest little and mushy food sources where the older and larger siblings require bigger prey for survival. Therefore parents are more likely to catch bigger prey, outweighing the benefits versus the costs of catching a certain size of a prey for their offspring. Slavsgold and Wiebe hypothesized there won’t be a difference in the range of prey sizez brought to the asynchronous nest compared to synchronous nests. This would decrease the younger’s offspring growth rate as well as it’s chance of survival. If the parents are purposely not feeding the younger siblings, they won’t even try to transfer the food to them. If the parents are trying to feed the younger siblings and are unsuccessful, the larger siblings will be given the prey showing that the feeding constraint hypothesis is