Immerse yourself in a cartoonish and colorful adventure, literally, and learn the story of intelligent fish. It is a point-and-click adventure game with platforming elements. Journal reference: PLoS ONE, DOI: 10.1371/ Nemo – this is the disregard of the 2003 cartoon of the same name. That suggests the larvae did not swim to their new homes, but were swept there. Simpson found there were strong prevailing currents flowing mainly from north to south, explaining why more larvae went south than north. Impressive though their journeys are, the clownfish larvae do not travel under their own steam. “So gene exchange from the southern populations could help the northern ones adapt as rising ocean temperatures gradually edge northwards.” “Cod sub-populations in southerly but not northerly ranges are already adapted to living in warmer water, for example,” says Simpson. Passing genes around could help populations that are affected by climate change adapt to the new conditions. That may be good news, because fish and other marine animals face a host of threats, including climate change which is both heating up their habitats and acidifying the water. He found 10 hybrids in the south and seven in the north, suggesting that previous migrants had successfully integrated and bred in their new homes. “There is a constant and meaningful exchange of genes,” says Simpson. The finding demonstrates that genes are being exchanged between seemingly distant colonies of reef fish, so each outpost is constantly being topped up with new genetic material. It’s the larvae that move.” Gene swapping In the film, an adult clownfish travels thousands of kilometres from the Great Barrier Reef to Sydney to find his son, says Simpson. The migrants had only recently been larvae, and must have arrived following that year’s spawning.
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