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This is Scientific American ― 60-Second Science. I'm Jason Goldman.
In the jungle, home is anywhere you can raise your babies ― while trying not to get gobbled up by somebody else.
Take a tiny creature from Brazil whose name is longer than it is: the Bahia's broad-snout casque-headed tree frog.
It likes to hang out in the little ponds that form in cavities within bromeliad plants.
These petite pools are technically known as "phytotelmata," from the Greek words for plant and pond.
A male finds a bromeliad and attracts a female, who lays her eggs directly into the water.
The male stays behind to guard the eggs and tadpoles ― spending the rest of his life within that one plant.
But not just any bromeliad pool will do.
"It's so crazy that there are some really nice, big bromeliads and I never found our frog there.
If I would be a frog, I would like that bromeliad."
Herpetologist Mirco Solé, from Brazil's State University of Santa Cruz, quoting his graduate student, Amanda Lanter-Silva.
"But then we made the research, and we saw that there were tradeoffs."
In all, Solé and his team surveyed 239 bromeliads within a protected part of Brazil's Atlantic rainforest,
of which 74 were occupied by frogs.
The frogs preferred big bromeliads.
这里是科学美国人――60秒科学。我是杰森・古德曼。
在丛林里,能抚养孩子的任何地方都是家,不过同时你也要尽量避免被其它动物吃掉。
以巴西一种小型生物为例,这种生物的名字比其身长还长:巴伊亚宽鼻盔头树蛙。
它喜欢待在凤梨科植物中小洞注水形成的小水池里。
这些小水池学名为“树上水池”,源于希腊语,意为植物和水池。
雄蛙发现凤梨科植物后会在此吸引雌蛙,雌蛙会直接将卵产在水中。
雄蛙留下来保护卵和蝌蚪,并在这株植物中度过余生。
但并不是每个凤梨水池都有雄蛙。
“有些凤梨又大又好,但我在里面却没找到一只雄蛙,这太不正常了。
如果我是树蛙,我会喜欢那种凤梨。”
这是巴西圣克鲁斯州立大学的爬虫学家米尔科・索莱引用其研究生阿曼达・莱特-席尔瓦的原话所说。
“但后来我们做了研究,发现树蛙有自己的权衡考虑。”
索莱及其团队调查了巴西大西洋雨林一片保护区中的230株凤梨,
其中74株被树蛙占领。
树蛙偏爱大凤梨。
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