2020:groups:g9:start
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2020:groups:g9:start [2020/01/10 21:43] – título mendes | 2020:groups:g9:start [2020/01/10 22:39] – prado | ||
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===== Introduction ===== | ===== Introduction ===== | ||
- | The gray-capped social weaver (//Pseugodonigrita | + | The gray-capped social weaver (//Pseudonigrita |
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- | Some members of this species may toss eggs in some adverse situations, such as to make space for new eggs when a nest is full or when the egg is unfertilized. Recently, a new event was discovered to trigger egg toss: when predation levels are high and clutch size becomes too small, some gray-capped social weaver parents may toss their eggs as a strategy to maximize its reproductive success, which is alleged to be a new feature in social birds, and is called parental tossing. | + | Some members of this species may toss eggs in adverse situations, such as to make space for new eggs when a nest is full or when the egg is unfertilized. Recently, a new event was discovered to trigger egg toss: when predation levels are high and clutch size becomes too small, some gray-capped social weaver parents may toss their eggs as a strategy to maximize its reproductive success, which is alleged to be a new feature in social birds, and is called parental tossing. |
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+ | The hypothesis is that the investment in hatching and nurturing the remaining eggs and newborns of the reduced clutch has a high risk of no return, since these newborns may die before hatching or maturing. | ||
+ | {{ https:// | ||
+ | Therefore, the gray-capped social weavers would throw these eggs out and save the energy and resources to the next breed, in which the probability of success is higher, since the new breed would have a higher number of eggs. Another | ||
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- | The hypothesis is that the investment in hatching and nurturing the remaining eggs and newborns of the reduced clutch has a high risk of no return, since these newborns may die before hatching or maturing. Therefore, the gray-capped social weavers would throw these eggs out and save the energy and resources to the next breed, in which the probability of success is higher, since the new breed would have a higher number of eggs. Another | ||
===== Assignment ===== | ===== Assignment ===== | ||
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Propose a mathematical model for the population dynamics of the gray-capped social weavers with tossing and non-tossing strategies. | Propose a mathematical model for the population dynamics of the gray-capped social weavers with tossing and non-tossing strategies. | ||
- | ===== Questions & Suggestions | + | ===== Suggested questions |
* What would be the demographic consequences of the egg-tossing behaviour by parents? Can you derive measures of the success of the egg-tossing strategy from these consequences? | * What would be the demographic consequences of the egg-tossing behaviour by parents? Can you derive measures of the success of the egg-tossing strategy from these consequences? | ||
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* Does the success of tossing depend on the size of the weaver and predator populations? | * Does the success of tossing depend on the size of the weaver and predator populations? | ||
+ | Further well-grounded questions from the group are welcome. | ||
===== References ===== | ===== References ===== |
2020/groups/g9/start.txt · Last modified: 2024/01/09 18:45 by 127.0.0.1