2019:groups:g7:start
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- | ====== Fishers vs Pirates: Does Crime Pay? ====== | ||
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If you are a group member login to edit this page, create new pages from it, and upload files. | If you are a group member login to edit this page, create new pages from it, and upload files. | ||
- | ==== Introduction ==== | + | ===== Introduction |
- | + | {{ https:// | |
- | Some animals are widely known for resorting to a different way of obtaining food: theft. Species that steal for eating are known as kleptoparasites. Usually they choose other species as victims, but that's not always true. Some species like the kelp gull (//Larus dominicanus// | + | Some animals are widely known for resorting to a different way of obtaining food: theft. Species that steal for eating are known as kleptoparasites. Usually they choose other species as victims, but that's not always true. Some species, like the kelp gull (//Larus dominicanus// |
One factor that affects the success of pirates is how many of them exist in the population. If there are few pirates and many fishers, there might be many gulls to steal from, making the theft easier. Otherwise, if there are many pirates and few fishers, there may be competition between pirates, and finding a gull to steal from may be hard. | One factor that affects the success of pirates is how many of them exist in the population. If there are few pirates and many fishers, there might be many gulls to steal from, making the theft easier. Otherwise, if there are many pirates and few fishers, there may be competition between pirates, and finding a gull to steal from may be hard. | ||
- | Several other factors influence the choice of a gull. Food availability may also be a factor. If there is plenty of fish, then fishing may be very easy. Also, the age of a gull may play an important | + | Food availability may also be a factor: if there is plenty of fish, then fishing may be very easy. The age of a gull may be important |
- | ==== Assignment ==== | + | ===== Assignment |
Build a mathematical model that describes the number (or proportion) of fishers and pirates on a population of kelp gulls taking into account the factors that affect the choice of the gulls. | Build a mathematical model that describes the number (or proportion) of fishers and pirates on a population of kelp gulls taking into account the factors that affect the choice of the gulls. | ||
- | ==== Suggested Questions ==== | + | ===== Suggested Questions |
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+ | * If the gulls' behavior is adaptive, what would be the " | ||
+ | * Are there conditions in which no gull would act as pirate? | ||
+ | * Is there an " | ||
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+ | ==== Challenge | ||
- | * Is there an optimal proportion of pirates? | + | * From an evolutionary point of view, is there an "optimal" - evolutionarily stable - proportion of pirates? |
- | * Are there conditions in which no gull wants to be a pirate? | + | |
- | ==== References ==== | + | ===== References |
Steele, W. K., & Hockey, P. A. (1995). Factors influencing rate and success of intraspecific kleptoparasitism among kelp gulls (Larus dominicanus). The Auk, 847-859. | Steele, W. K., & Hockey, P. A. (1995). Factors influencing rate and success of intraspecific kleptoparasitism among kelp gulls (Larus dominicanus). The Auk, 847-859. | ||
2019/groups/g7/start.1545159710.txt.gz · Last modified: 2024/01/09 18:45 (external edit)