Unsplash<\/a><\/figcaption><\/figure>\n\n\n\nObserwacja i analiza:<\/p>\n\n\n\n
Izotopy to pierwiastki, kt\u00f3re maj\u0105 tak\u0105 sam\u0105 liczb\u0119 proton\u00f3w, ale inn\u0105 liczb\u0119 neutron\u00f3w i nie rozpadaj\u0105 si\u0119 z up\u0142ywem czasu.<\/p>\n\n\n\n
Obecnie te izotopy pierwiastk\u00f3w zosta\u0142y powi\u0105zane z okre\u015bleniem \u017ar\u00f3d\u0142a diety zwierz\u0105t w\u0119drownych.<\/p>\n\n\n\n
Warstwy soczewki ga\u0142ki ocznej s\u0105 bogate w bia\u0142ka. Bia\u0142ka te s\u0105 wi\u0105zane przez pierwiastki izotopowe, kt\u00f3re prowadz\u0105 do sygnatury izotopowej, kt\u00f3r\u0105 mo\u017cna oceni\u0107 za pomoc\u0105 analizy stabilnych izotop\u00f3w.<\/p>\n\n\n\n
M\u0142ode ryby \u0142ososiowate badano w trzech r\u00f3\u017cnych siedliskach izotopowych z r\u00f3\u017cn\u0105 sieci\u0105 pokarmow\u0105 w celu ilo\u015bciowego okre\u015blenia archiwalnej tkanki ga\u0142ki ocznej ryb.<\/p>\n\n\n\n
U\u017cyte stabilne izotopy to siarka 35, w\u0119giel 13 i azot 15 (34<\/sup>S, 13<\/sup>C,15<\/sup>N).<\/p>\n\n\n\nIzotop siarki jest przydatny w poznaniu \u017ar\u00f3de\u0142 diety. Ryby z migracji przybrze\u017cnych s\u0105 bogate w izotop w\u0119gla 13, dlatego jest on u\u017cywany do okre\u015blenia ruchu migracyjnego.<\/p>\n\n\n\n
Izotop azotu jest wykorzystywany w zarz\u0105dzaniu poziomami troficznymi u zwierz\u0105t w\u0119drownych.<\/p>\n\n\n\n
Analiza stabilnych izotop\u00f3w zosta\u0142a opracowana w oparciu o koncepcj\u0119 \"jeste\u015b tym, co jesz\".<\/p>\n\n\n\n
Na tej podstawie naukowcy poszukiwali izotop\u00f3w pierwiastk\u00f3w takich jak siarka, w\u0119giel i azot w tkankach doros\u0142ych ryb \u0142ososiowatych hodowanych w trzech r\u00f3\u017cnych siedliskach.<\/p>\n\n\n\n
Ich badania doprowadzi\u0142y do odkrycia, \u017ce ryby hodowane na sezonowych terenach zalewowych mia\u0142y wi\u0119cej warstw soczewki, a tak\u017ce ros\u0142y znacznie szybciej ni\u017c te hodowane w rzece i siedlisku wyl\u0119garni.<\/p>\n\n\n\n
Analiza izotopowa wykaza\u0142a r\u00f3wnie\u017c, \u017ce ryby mia\u0142y wysok\u0105 zawarto\u015b\u0107 w\u0119gla i siarki ze wzgl\u0119du na pola ry\u017cowe obwodnicy.<\/p>\n\n\n\n
Wi\u0105zanie bia\u0142ek kuli rybiej z izotopem pierwiastka zosta\u0142o wykorzystane do analizy zawarto\u015bci diety.<\/p>\n\n\n\n
Opr\u00f3cz tego, m\u0142ode ryby \u0142ososiowate mia\u0142y stabilny izotop pierwiastka zarejestrowany w soczewce oka, co doprowadzi\u0142o do por\u00f3wnania z doros\u0142ymi rybami w celu przegl\u0105du ich siedliska i \u017ar\u00f3d\u0142a po\u017cywienia.<\/p>\n\n\n\n
Narz\u0119dzie analizy stabilnego izotopu (SIA) poszerzy\u0142o zakres r\u00f3\u017cnych projekt\u00f3w ochrony przyrody. Mo\u017ce by\u0107 wykorzystywana do izolowania siedlisk r\u00f3\u017cnych zwierz\u0105t w\u0119drownych, poniewa\u017c s\u0105 one silnie dotkni\u0119te obecnymi zmianami klimatycznymi, a tak\u017ce dzia\u0142alno\u015bci\u0105 cz\u0142owieka.<\/p>\n\n\n\n
Aby dowiedzie\u0107 si\u0119 wi\u0119cej o ich badaniach, zapoznaj si\u0119 z odno\u015bnikiem podanym poni\u017cej.<\/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. Post\u0119py w rekonstrukcji diety w soczewkach dla rybich oczu<\/strong>. Metody w ekologii i ewolucji<\/em>, 2021; DOI: 10.1111\/2041-210X.13543<\/a><\/p>\n\n\n\n<\/p>","protected":false},"excerpt":{"rendered":"
Zgadza si\u0119, wszystkie odpowiedzi kryj\u0105 si\u0119 w oczach. Nawet je\u015bli chodzi o histori\u0119 ryb. Naukowiec Miranda Bell i jego zesp\u00f3\u0142 z Uniwersytetu Kalifornijskiego zilustrowali wykorzystanie soczewek ga\u0142ek ocznych ryb do przewidywania zmian w diecie i migracji ryb. Migracja zwierz\u0105t wodnych jest zwykle pod [...]<\/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>