2020:groups:g10:start
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2020:groups:g10:start [2020/01/09 00:43] – poloni | 2020:groups:g10:start [2020/01/10 17:54] (current) – moved theme 10 to 4 mendes | ||
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- | **Group 10** | ||
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- | embarassment of plastics</ | ||
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- | Wiki site of the practical exercise of the [[http:// | ||
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- | Here you will find the exercise assignment and the group' | ||
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- | If you are a group member login to edit this page, create new pages from it, and upload files. | ||
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- | ===== Introduction ===== | ||
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- | Many marine fish begin their life at ocean surface, where they live for days to weeks, feeding mainly from zooplankton until its development is complete. The availability of such resource is therefore fundamental for these marine fish species' | ||
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- | Surface slicks are meandering lines of convergence on the ocean surface, usually formed by wind and internal waves, that accumulate zooplankton and other microorganisms, | ||
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- | The mean size of fishes in slicks was found to be almost 30% larger than in other surface areas, probably because some larger larval fish are able to detect the accumulation of resources and indeed travel from slick to slick, whilst other large larval fish cannot detect or choose not to travel to slicks, feeding less than fishes in slicks and presenting a smaller mean size. Also, since smaller larval fish are dragged in and out of slicks, some can remain feeding in it and achieve larger sizes than the ones that don' | ||
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- | {{2020: | ||
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- | However, these surface slicks also tend to accumulate micro plastics that are often mistaken as food by larval fish. Currently slicks contain a ratio of about 7:1 of plastics: | ||
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- | ===== Assignment ===== | ||
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- | Propose a mathematical model for the fish population, incorporating the effects of resource and plastic accumulation in slicks and also the possible harmful effects plastics may cause in fish population. | ||
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- | ===== Questions & Suggestions ===== | ||
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- | * Is there any advantage in avoiding surface slicks due to plastic accumulation? | ||
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- | * Could larval fish maintain plastic levels in surface slicks under control due to their accidental consumption? | ||
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- | * We suggest you to focus on larger larval fishes, as they can actively search, or not, for slicks. | ||
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- | ===== References ===== | ||
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- | J.M. Gove //et al.// | ||
- | **Prey-size plastics are invading larval fish nurseries**, |
2020/groups/g10/start.1578530596.txt.gz · Last modified: 2024/01/09 18:45 (external edit)