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The broad reduction hypothesis, one of several hypotheses explaining asynchronous hatching.

Brood reduction hypothesis: A strategy that enables partial success of meat spine by feeding older and older offspring during food shortages.

 

Birds of prey: Increasing the probability of food shortage because large prey has to be eaten separately between siblings, competition is fierce, and prey has to be sought through hunting.

→ Therefore, the probability of brothers not being able to eat evenly increases ☞ The road reduction hypothesis is appropriate.

 

Mountain bird (Sparrow tree): Small food size allows young to swallow food in one bite, making it relatively easier to find food than birds of prey.

→ Therefore, the probability of brothers eating evenly increases ☞ Brood reduction hypothesis is inappropriate

 

The purpose of this study is to verify that the road reduction hypothesis that explains asynchronous hatching does not apply to mountain birds.

 

The hypothesis of this study is that mountain birds feed their babies evenly. If this is proved by experiment, it is proved that the road reduction hypothesis does not fit the mountain bird.

 

On the other hand, if the experiment does not prove this hypothesis (i.e., if mountain birds do not feed their babies evenly), we will analyze the cause by watching videos of why mountain birds feed their babies disproportionately.