 Wysłany: Nie 0:15, 18 Sie 2013 Temat postu: Fish fight breaks out over tiny catch |
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| Fish fight breaks out over tiny catch
One small fish: Paedocypris progenetica gets lost on a fingertip.© Maurice Kottelat Cornol Switzerland and Raffles Museum Singapore You might be more used to arguments about who has caught the biggest fish. But this week a squabble has broken out among zoologists, each of whom is claiming to have found the smallest. The debate began when Ralf Britz,Duvetica Jackets For Women, of London's Natural History Museum, and his colleagues announced the discovery of Paedocypris progenetica,giuseppe zanotti shoes, a fish that lives in acidic peat swamps of southeast Asia. With females measuring just 7.9 millimetres long,giuseppe zanotti heels, and males just a tad bigger, the species is truly a tiddler. The researchers claimed it should be recognized as the smallest backboned animal in the world1 (see Go fish!). not just millimetres that count - it's how you use those millimetres. Ted Pietsch, of the University of Washington in Seattle, points out that last year he described an even smaller fish, which he claims should be recognized as first (or perhaps last) in the size stakes. "When I saw the paper I thought 'hey!'," Pietsch recalls. He was surprised to see that the researchers made no mention of the deep-sea anglerfish Photocorynus spiniceps, males of which are just 6.2 millimetres long. My fish is smaller than your fish Pietsch discovered his fish, which lives in waters off the Philippines,giuseppe zanotti sandals, by trawling through a museum collection. He described the species at a meeting in Taiwan in May 2005, and later published the details2. So is his the true king of the mini fish? Like all the best arguments, it's not that simple. Photocorynus spiniceps females are much larger,isabel marant sneakers, and the tiny males hitch a ride on their backs as permanent breeding partners. Pietsch/University of Washington That argument holds no water for Pietsch,Cheap Giuseppe Zanotti Shoes, however. "To me it doesn't matter if it's a breeding parasite," he says. It is still a sexually mature adult with a backbone, he argues. Britz counters that because the male's jaws are latched on to the female,cheap Giuseppe Zanotti Shoes, it may in fact be longer than Pietsch's measurement. "Salamanders are the smallest vertebrates - there's not even any question,giuseppe zanotti sneakers," says David Wake of the University of California,Soccer Shoes on Sale, Berkeley. These amphibians are typically at least several centimetres long. But that is tiny in relation to the size of their genome, Wake points out. Of the 500 different salamander species,isabel marant online, many have well over ten times as much genetic material in each cell as humans do. This makes for big,giuseppe zanotti for men, cumbersome cells,giuseppe zanotti sale, which means that adopting a complex body form is more of an achievement given the same body size,isabel marant australia, Wake argues. "I'm always surprised that biologists who want to make sophisticated arguments resort to using a metre stick,Australia Isabel Marant," he says. "It's not just millimetres that count - it's how you use those millimetres." Fella feeling But how should one resolve the fish dispute? Wake suggests judging on the basis of the larger of the two sexes rather than the smaller, meaning that P. progenetica, championed by Britz's team,cheap isabel marant, would emerge victorious. Either way, it does not look as if either of the camps will hold a grudge against the other. "These are fellas I've known for 30 years," says Pietsch. "It's a very friendly debate."相关的主题文章： http://latale.bbspace.org/viewthread.php?tid=31435&extra=page%3D1&frombbs=1 http://jnyinzuo.com/forum.php?mod=viewthread&tid=148837 http://www.51dou.cn/thread-102616-1-1.html http://yes.photovsky.com/2012/08/post-342.html#comments http://r4pid.com/viewtopic.php?f=4&t=340695 http://www.ezreadmag.com/?p=160366 http://socialcirclessite.com/blogs/viewstory/1203123 http://www.opda.com.cn/ http://planetlivechat.com/chatcommunity/subscribe/ http://pantydeal.net/index.php/members/home http://www.cnshmo.com/bbs//viewthread.php?tid=256665&extra= http://www.pcf8.com/bbs/forum.php?mod=viewthread&tid=12712352 http://blogs.princeton.edu/pia/personal/xinjiang/2009/06/profiling.html#comments http://jibuzi.com/plugin.php?id=jbz_userinfo:userinfo http://kawaseshijima.odayakaan.com/2012/08/post-1333.html#comments |
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