Unsplash<\/a><\/figcaption><\/figure>\n\n\n\nVaatlus ja anal\u00fc\u00fcs:<\/p>\n\n\n\n
Isotoobid on elemendid, millel on sama arv prootoneid, kuid erinev arv neutroneid, mis ei lagune aja jooksul.<\/p>\n\n\n\n
N\u00fc\u00fcd on neid isotoope seostatud r\u00e4ndloomade toiduallika kindlaksm\u00e4\u00e4ramisega.<\/p>\n\n\n\n
Silmal\u00e4\u00e4tsede l\u00e4\u00e4tsed on v\u00e4idetavalt valgurikkad. Need valgud on seotud isotoopelementidega, mis viivad isotoopiam\u00e4rgistuseni, mida saab hinnata stabiilse isotoopanal\u00fc\u00fcsi abil.<\/p>\n\n\n\n
L\u00f5he noorkala uuriti kolmes erinevas isotoopilises elupaigas koos erineva toiduv\u00f5rgustikuga, et kvantifitseerida kalade silmamuna arhivaalkude.<\/p>\n\n\n\n
Stabiilsete isotoopidena kasutati v\u00e4\u00e4vlit 35, s\u00fcsinikku 13 ja l\u00e4mmastikku 15 (34<\/sup>S, 13<\/sup>C,15<\/sup>N).<\/p>\n\n\n\nV\u00e4\u00e4vli isotoop on kasulik toiduallikate tundma\u00f5ppimisel. Rannikul r\u00e4ndavate kalade isotoopides on palju s\u00fcsinik-13-isotoopi, seega kasutatakse seda r\u00e4ndliikumise m\u00e4\u00e4ramiseks.<\/p>\n\n\n\n
L\u00e4mmastiku isotoopi kasutatakse r\u00e4ndloomade troofiliste tasemete reguleerimisel.<\/p>\n\n\n\n
Stabiilsete isotoopide anal\u00fc\u00fcs on koostatud p\u00f5him\u00f5ttel \"sa oled see, mida sa s\u00f6\u00f6d\".<\/p>\n\n\n\n
Selle p\u00f5hjal uurisid teadlased kolmes erinevas elupaigas kasvanud t\u00e4iskasvanud l\u00f5hekalade kudedes selliseid isotoope nagu v\u00e4\u00e4vel, s\u00fcsinik ja l\u00e4mmastik.<\/p>\n\n\n\n
Nende uuringu tulemusena leiti, et hooajalises \u00fcleujutusalal kasvatatud kaladel oli rohkem l\u00e4\u00e4tsekihte, samuti kasvasid nad palju kiiremini kui j\u00f5e ja haudejaama elupaigas kasvatatud kalad.<\/p>\n\n\n\n
Samuti n\u00e4itas isotoopanal\u00fc\u00fcs, et kaladel oli k\u00f5rge s\u00fcsiniku- ja v\u00e4\u00e4vlisisaldus, mis oli tingitud m\u00f6\u00f6das\u00f5idutee riisip\u00f5ldudest.<\/p>\n\n\n\n
Silmakala palli valkude ja isotoopelemendi sidumist kasutati toitainete sisalduse anal\u00fc\u00fcsimiseks.<\/p>\n\n\n\n
Peale selle registreeriti noorkalade silmal\u00e4\u00e4tses stabiilne isotoopelement, mis v\u00f5imaldas v\u00f5rrelda t\u00e4iskasvanud kaladega, et saada \u00fclevaade nende elupaigast ja toiduallikast.<\/p>\n\n\n\n
See stabiilse isotoobi anal\u00fc\u00fcsi (SIA) vahend on laiendanud erinevate looduskaitseprojektide ulatust. Seda v\u00f5iks kasutada erinevate r\u00e4ndloomade elupaikade isoleerimiseks, kuna praegused kliimamuutused ja ka inimtegevus m\u00f5jutavad neid tugevalt.<\/p>\n\n\n\n
Et rohkem teada saada nende uuringute kohta, vaadake allpool toodud viidet.<\/p>\n\n\n\n
Miranda Bell-Tilcock, Carson A. Jeffres, Andrew L. Rypel, Ted R. Sommer, Jacob V. E. Katz, George Whitman, Rachel C. Johnson. Edasine toitumisrekonstrueerimine kalasilmal\u00e4\u00e4tsede puhul<\/strong>. \u00d6koloogia ja evolutsiooni meetodid<\/em>, 2021; DOI: 10.1111\/2041-210X.13543<\/a><\/p>\n\n\n\n<\/p>","protected":false},"excerpt":{"rendered":"
See on \u00f5ige, k\u00f5ik vastused peituvad silmades. Isegi siis, kui tegemist on kalade ajalooga. Teadlane Miranda Bell ja tema meeskond California \u00fclikoolist n\u00e4itasid, kuidas kalade silmal\u00e4\u00e4tsede abil saab ennustada kalade toitumise ja r\u00e4nde muutusi. Veeloomade r\u00e4nne on tavaliselt alla [...]<\/p>","protected":false},"author":18,"featured_media":12903,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[959,28],"tags":[554],"yoast_head":"\n
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<\/a>