Qee cov qav ci thaum tsaus ntuj, siv cov tshuaj fluorescent, cov kws tshawb fawb hais
Xyoo 2017, cov kws tshawb fawb tau tshaj tawm ib qho txuj ci tseem ceeb, qee cov qav ci thaum tsaus ntuj, siv cov tshuaj fluorescent uas peb tsis tau pom ua ntej hauv qhov xwm txheej.
Thaum lub sijhawm, nws tsis paub tias muaj pes tsawg hom qav tuaj yeem tawm cov fluorescence no.
Kev tshawb fawb ntawm 151 hom ntawm South American frogs qhia qhov degree ntawm fluorescence ntawm txhua tus neeg hom. Cov ntaub ntawv los ntawm kev tshawb fawb qhia tias fluorescence yog khi rau cov qav qhov muag.
Raws li cov kws tshawb fawb, lub teeb emission cuam tshuam rau txoj kev qav qhia rau ib leeg. Lawv ntseeg tias fluorescence repels predators.
"Los ntawm kev kawm hauv South America, peb tau tshawb pom thiab sau cov qauv ntawm biofluorescence nyob rau hauv cov hav zoov kub hnyiab," sau Florida State University biologist Courtney Witcher.
"Muaj ntau yam hauv tsiaj lub nceeg vaj ci ntsa iab, tab sis qhov laj thawj tsis yog ib txwm pom tseeb," cov kws tshawb fawb taw qhia.
Fluorescence yog hom ci uas tsim thaum lub teeb raug nqus thiab rov ua dua ntawm qhov sib txawv ntawm lub wavelength, thiab pom nyob rau hauv ntau hom, nrog rau sharks, chameleons thiab salamanders. Cov pob txha kuj fluoresce, cov kws tshawb fawb piav qhia.
Cov biofluorescence tsim nyob rau hauv daim tawv nqaij ntawm Qav yog txawv los ntawm fluorescence ntawm lwm yam luminous tsiaj.
Lub teeb xiav, uas yog ze tshaj plaws rau lub ntiaj teb lub ntuj twilight, tsim cov fluorescence muaj zog tshaj plaws, thiab cov fluorescence nws tus kheej tshwm nyob rau hauv ob qho tib si peaks ntawm pom lub teeb - ntsuab thiab txiv kab ntxwv, cov kws tshawb fawb hais tias.
Ntau tus qav yog crepuscular - uas yog, lawv ua haujlwm thaum tsaus ntuj. Hauv qee hom, lawv ob lub qhov muag tau tsim los ua haujlwm zoo tshaj plaws nyob rau hauv lub teeb no, dominated los ntawm pas nrig-shaped photoreceptors rhiab rau ntsuab thiab xiav, sau Science Alert.
Qav 'ntsuab ci ci tshaj plaws thaum nruab hnub, cov kws tshawb fawb piav qhia. Qhov chaw ntawm lub cev uas ci ntsa iab yog cov feem ntau koom nrog kev sib txuas lus tsiaj, uas yog lub caj pas thiab nraub qaum. Qhov no qhia tias biofluorescence yog ib feem ntawm cov cuab yeej sib txuas lus ntawm cov qav.
Source: Science Alert
Duab los ntawm nastia: https://www.pexels.com/photo/green-frog-103796/
