In addition, they used a "population dynamics" model describing the mating patterns and breeding success of emperor penguins.

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The topics include civil engineering, insect genetics, invasion biology, fish population dynamics, and toxic chemical exposures, among others.

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Population dynamics are outstripping even the most optimistic scenarios.

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In a study published last year in Conservation Letters, a group of scientists led by Brian MacKenzie, of the Technical University of Denmark, describe how they ran a computer model of the bluefin tuna's population dynamics.

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Experience with other fisheries, such as the collapse of the cod population of the Grand Banks off Newfoundland in 1992, has shown that the dynamics of an ecosystem can change when a top predator is removed completely.

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In fact, it corresponds to a decades-old phenomenon related to US internal dynamics, especially to changes in demographics (the relative rise in population of southern and western states such as Texas, California, Oregon which have had traditionally less links with Europe).

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