Unsplash<\/a><\/figcaption><\/figure>\n\n\n\nObserva\u021bie \u0219i analiz\u0103:<\/p>\n\n\n\n
Izotopii sunt elemente care au acela\u0219i num\u0103r de protoni, dar un num\u0103r diferit de neutroni care nu se dezintegreaz\u0103 \u00een timp.<\/p>\n\n\n\n
Acum, aceste elemente izotopice au fost asociate cu determinarea sursei alimentare a animalelor migratoare.<\/p>\n\n\n\n
Se spune c\u0103 lamelele lentilelor globului ocular sunt bogate \u00een proteine. Aceste proteine sunt legate de elemente izotopice care conduc la o semn\u0103tur\u0103 izotopic\u0103 ce poate fi evaluat\u0103 prin analiza izotopilor stabili.<\/p>\n\n\n\n
Pe\u0219tele somon juvenil a fost studiat \u00een trei habitate izotopice diferite, cu o re\u021bea alimentar\u0103 diferit\u0103, pentru a cuantifica \u021besutul arhivat al globului ocular al pe\u0219tilor.<\/p>\n\n\n\n
Elementele izotopice stabile utilizate au fost: sulf 35, carbon 13 \u0219i azot 15 (34<\/sup>S, 13<\/sup>C,15<\/sup>N).<\/p>\n\n\n\nIzotopul de sulf este util pentru cunoa\u0219terea surselor alimentare. Pe\u0219tele provenit din migra\u021bia costier\u0103 este bogat \u00een izotopul carbonului 13 \u0219i, prin urmare, este utilizat pentru a determina mi\u0219carea migratorie.<\/p>\n\n\n\n
Izotopul de azot este utilizat \u00een reglarea nivelurilor trofice la animalele migratoare.<\/p>\n\n\n\n
Analiza izotopilor stabili este formulat\u0103 pe baza conceptului \"e\u0219ti ceea ce m\u0103n\u00e2nci\".<\/p>\n\n\n\n
Pe aceast\u0103 baz\u0103, oamenii de \u0219tiin\u021b\u0103 au c\u0103utat elemente izotopice, cum ar fi sulful, carbonul \u0219i azotul, \u00een \u021besuturile pe\u0219tilor somon adul\u021bi crescu\u021bi \u00een trei habitate diferite.<\/p>\n\n\n\n
Studiul lor a dus la descoperirea faptului c\u0103 pe\u0219tii crescu\u021bi \u00een c\u00e2mpiile inundabile sezoniere aveau mai multe straturi de cristalin \u0219i cre\u0219teau mult mai repede dec\u00e2t cei crescu\u021bi \u00een r\u00e2u \u0219i \u00een habitatul de incubare.<\/p>\n\n\n\n
De asemenea, analiza izotopic\u0103 a ar\u0103tat c\u0103 pe\u0219tii aveau un con\u021binut ridicat de carbon \u0219i sulf din cauza c\u00e2mpurilor de orez din zona de ocolire.<\/p>\n\n\n\n
Pentru a analiza con\u021binutul de hran\u0103 a fost utilizat\u0103 legarea proteinelor din globul de pe\u0219te \u0219i a elementului izotopic.<\/p>\n\n\n\n
\u00cen afar\u0103 de aceasta, pe\u0219tele somon t\u00e2n\u0103r a avut un element izotopic stabil \u00eenregistrat \u00een cristalinul ocular, ceea ce a dus la compararea cu pe\u0219tele adult pentru a avea o imagine de ansamblu a habitatului \u0219i a sursei sale alimentare.<\/p>\n\n\n\n
Acest instrument de analiz\u0103 a izotopilor stabili (ASI) a l\u0103rgit domeniul de aplicare pentru diverse proiecte de conservare. Acesta ar putea fi utilizat pentru a izola habitatele pentru diverse animale migratoare, deoarece acestea sunt foarte afectate de schimb\u0103rile climatice actuale \u0219i de activit\u0103\u021bile umane.<\/p>\n\n\n\n
Pentru a afla mai multe despre cercetarea lor, consulta\u021bi referin\u021ba de mai jos.<\/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. Avansarea reconstruc\u021biei dietei \u00een lentilele cu ochi de pe\u0219te<\/strong>. Metode \u00een ecologie \u0219i evolu\u021bie<\/em>, 2021; DOI: 10.1111\/2041-210X.13543<\/a><\/p>\n\n\n\n<\/p>","protected":false},"excerpt":{"rendered":"
A\u0219a este, toate r\u0103spunsurile se afl\u0103 \u00een ochi. Chiar \u0219i atunci c\u00e2nd vine vorba de istoria pe\u0219tilor. Cercet\u0103torul Miranda Bell \u0219i echipa sa de la Universitatea din California au ilustrat utilizarea lentilelor globilor oculari ai pe\u0219tilor pentru a prezice schimb\u0103rile \u00een dieta \u0219i migra\u021bia pe\u0219tilor. Migra\u021bia animalelor acvatice este, de obicei, sub [...]<\/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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