{"id":35758,"date":"2019-10-31T22:06:11","date_gmt":"2019-10-31T19:06:11","guid":{"rendered":"https:\/\/prohoster.info\/blog\/zaraznyj-stress-mezhvidovaya-sinhronizatsiya-urovnya-kortizola-na-primere-sobak-i-ih-hozyaev\/"},"modified":"2019-10-31T22:06:11","modified_gmt":"2019-10-31T19:06:11","slug":"zaraznyj-stress-mezhvidovaya-sinhronizatsiya-urovnya-kortizola-na-primere-sobak-i-ih-hozyaev","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hr\/blog\/news\/zaraznyj-stress-mezhvidovaya-sinhronizatsiya-urovnya-kortizola-na-primere-sobak-i-ih-hozyaev","title":{"rendered":"Zarazni stres: me\u0111usobna uskla\u0111enost razine kortizola kod pasa i njihovih vlasnika","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><img decoding=\"async\" alt=\"Zarazni stres: me\u0111usobna uskla\u0111enost razine kortizola kod pasa i njihovih vlasnika\" src=\"\/wp-content\/uploads\/2019\/06\/63a4a70d063e48cee790aed02df77736.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n\u010covjek je dru\u0161tveno bi\u0107e. Koliko god se pojedinac trudio da bude izoliran ili udaljen, drugi ljudi \u0107e na njega utjecati, \u010desto i ne \u017eele\u0107i to. Ovaj fenomen nazivamo me\u0111udjelovanja unutar vrste. Va\u017ena rije\u010d u ovoj dugoj definiciji je \"unutar vrste\". To zna\u010di da se sli\u010dne reakcije mogu promatrati ne samo u grupama ljudi, ve\u0107 i u jatima ptica, u \u010doporu lavova ili \u010dak u stadu ovaca. Organizam u bliskoj povezanosti tijekom du\u017eeg vremena utje\u010de na druge, uklju\u010duju\u0107i aspekte psiho-emocionalnog stanja. Danas \u0107emo razgovarati o istra\u017eivanju \u010diji su rezultati, prema tvrdnjama autora, postali prvi stvarni dokaz me\u0111uvrsne dvostrane psiho-emocionalne reakcije. Kako se to manifestira, tko su bili subjekti istra\u017eivanja i kako znanstvenici potkrepljuju svoje zaklju\u010dke? To \u0107emo saznati iz izvje\u0161taja istra\u017eiva\u010dke grupe. Idemo.<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<h3>Osnova istra\u017eivanja<\/h3>\n<p>\nAko pitate koje karakteristike isti\u010du \u010dovjeka u odnosu na druga bi\u0107a, mnogi \u0107e prvo spomenuti inteligenciju, i to \u0107e biti to\u010dno. Drugi \u0107e dodati dru\u0161tvenost i emocionalnost, ali ti epiteti nisu primjenjivi samo na ljude. Sva bi\u0107a koja \u017eive u grupama su dru\u0161tvena. \u0160to se ti\u010de emocija, \u010dovjek mo\u017ee imati i posjeduje \u0161iri spektar emocija i metoda njihova izra\u017eavanja nego neka surikata, ali emocije nisu njegova jedinstvena osobina. <\/p>\n<p>Psiho-emocionalno stanje pojedinca \u010desto je jako povezano s okru\u017eenjem u kojem se nalazi, posebice s dru\u0161tvom koje ga okru\u017euje. Znanstvenici to nazivaju zaraznim emocijama, me\u0111u kojima je najja\u010da \"infekcija\" stres. Na primjer, utvr\u0111eno je da studenti \u010diji u\u010ditelj stalno stvara stres, imaju povi\u0161ene razine <i>kortizola*<\/i>. <\/p>\n<blockquote><p><b>Kortizol*<\/b> je biolo\u0161ki aktivni glukokortikoidni hormon koji sudjeluje u odgovorima organizma na stresne situacije.<\/p>\n<p><img decoding=\"async\" alt=\"Zarazni stres: me\u0111usobna uskla\u0111enost razine kortizola kod pasa i njihovih vlasnika\" src=\"\/wp-content\/uploads\/2019\/06\/37aa4fe5b7b5169c9b3af9516af370a4.png\" style=\"display:block;margin: 0 auto;\" \/><\/p><\/blockquote>\n<p>Sli\u010dnu sliku mo\u017eemo promatrati \u010dak i kod preri\u0161nih voluharica (Microtus ochrogaster), koje pokazuju korelaciju razina stresa s partnerom koji je prethodno bio izlo\u017een <i>stresoru*<\/i>.<\/p>\n<blockquote><p><b>Stresor*<\/b> \u2014 bilo koji faktor koji izaziva stres.<\/p><\/blockquote>\n<p>No, ovo su primeri intra-vrsovne korelacije stresa. Inter-vrsovna tako\u0111e postoji, iako nije toliko istra\u017eena. Da bi ovo ispravili, nau\u010dnici su predlo\u017eili prou\u010davanje nivoa stresa kod ku\u0107nih pasa i njihovih vlasnika. Kao \u0161to smo ve\u0107 diskutovali u <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/ua-hosting\/blog\/456850\/\">pro\u0161li petak<\/a><\/noindex>, \u010dovek i pas koegzistiraju ve\u0107 mnoge hiljade godina. Oboje su socijalna bi\u0107a, pa je sasvim o\u010dekivano da psiholo\u0161ko-emocionalna povezanost postoji u ovakvim odnosima.<\/p>\n<p>Nau\u010dnici tvrde da izme\u0111u \u010doveka i njegovog \u010detvorono\u017enog prijatelja mo\u017ee do\u0107i do me\u0111uvrsovne dugoro\u010dne sinhronizacije hormona stresa (kortizola), \u010diji nivo se mo\u017ee proveriti putem dlake. Krv i slina su odba\u010deni, jer ovi materijali daju rezultate koji opisuju nedavni period, dok dlaka omogu\u0107ava procenu dugoro\u010dnog hormonskog okru\u017eenja. Dlaka raste, koliko god to zvu\u010dalo banalno, i kortizol ostavlja svoj trag u njoj, \u010dije prou\u010davanje mo\u017ee dovesti do retrospektivnog kalendara koncentracija ovog hormona. Sli\u010dna analiza ve\u0107 je ranije sprovedena u slu\u010daju majki i njihove dece, \u010diji je nivo kortizola, prema rezultatima, bio sinhronizovan.<\/p>\n<p>\u0160to se ti\u010de pasa, va\u017ena karakteristika u komunikaciji \u010doveka sa svojim ljubimcem je obuka i postavljanje hijerarhije. Ako pas nije obu\u010den, mo\u017ee se pona\u0161ati nepristojno (na primer, zalivati va\u0161e omiljene cve\u0107e na na\u010din koji vama ne odgovara, ili lajati i napadati prolaznike). Da bi se postigla disciplina, pas mora shvatiti da je njegov vlasnik vo\u0111a, tj. dominantna jedinka u \u010doporu. Proces obuke i disciplinovanja pasa dovodi ne samo do emocionalne veze izme\u0111u njega i \u010doveka, ve\u0107 i obostrano uti\u010de na pona\u0161anje svakog od <i>diada*<\/i>.<\/p>\n<blockquote><p><b>Diada*<\/b> \u2014 simbioza u kojoj postoji hijerarhijska zavisnost. Diada je tako\u0111e i skupina dva me\u0111usobno povezana objekta, tj. par.<\/p><\/blockquote>\n<p>Nivo kortizola, kako su istra\u017eivanja pokazala, kod pasa i \u010doveka zavisi i od li\u010dnih karakteristika vlasnika, pa \u010dak i kombinacije pola psa\/vlasnika u diadi. <\/p>\n<p><img decoding=\"async\" alt=\"Zarazni stres: me\u0111usobna uskla\u0111enost razine kortizola kod pasa i njihovih vlasnika\" src=\"\/wp-content\/uploads\/2019\/06\/a92c2ed0032616baae19e81da14e8912.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>U\u010desnici istra\u017eivanja: border-koli (sleva) i sheltie (desno).<\/i><\/p>\n<p>U ovom radu znanstvenici su se odlu\u010dili detaljnije prou\u010diti pitanje me\u0111usobne psiho-emocionalne sinhronizacije na primjeru dijade \u010dovjek-pas. Za to je pozvano 58 ljudi i njihovih ljubimaca (tj. 58 dijada). Znanstvenici su pratili fizi\u010dku aktivnost svake od pasa putem posebne ogrlice koja prenosi podatke o stanju organizma psa. Razina kortizola kod pasa i njihovih vlasnika mjerena je tijekom ljetnih i zimskih mjeseci kako bi se analizirale promjene u razdoblju izme\u0111u uzorkovanja biolo\u0161kog materijala (dlake). U istra\u017eivanju su sudjelovale dvije pasmine pasa \u2013 sheltie (33 jedinke: 18 \u017eenki i 15 mu\u017ejaka) i border collie (25 jedinki: 13 \u017eenki i 12 mu\u017ejaka), me\u0111u kojima su bili i obi\u010dni ku\u0107ni ljubimci te stalni sudionici razli\u010ditih natjecanja. Svi vlasnici pasa bile su \u017eene. Prosje\u010dna dob repatih ispitanika iznosila je 4,7 \u00b1 0,4 godine za obi\u010dne ljubimce i 4,7 \u00b1 0,7 godina za sudionike natjecanja. Prosje\u010dna dob vlasnica pasa iznosila je 46,3 \u00b1 1,7 godina.<\/p>\n<h3>Rezultati istra\u017eivanja<\/h3>\n<p>\nZa analizu u\u010dinka \u010dovjeka na psa kori\u0161ten je generalizirani linearni model uzimaju\u0107i u obzir spol, pasminu i na\u010din \u017eivota ljubimaca.<\/p>\n<p><img decoding=\"async\" alt=\"Zarazni stres: me\u0111usobna uskla\u0111enost razine kortizola kod pasa i njihovih vlasnika\" src=\"\/wp-content\/uploads\/2019\/06\/09bca58d0155d52b5894948d6353cb14.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Slika br. 1<\/i><\/p>\n<p>Kao \u0161to je prikazano na gornjem grafu, razina kortizola vlasnika zaista sna\u017eno utje\u010de na istu vrijednost kod pasa kako zimi (N = 55, \u03c72 = 13.796, P &lt; 0.001, \u03b2 = 0.027), tako i ljeti (N = 57, \u03c72 = 23.697, P &lt; 0.001, \u03b2 = 0.235). Drugim rije\u010dima, kada razina kortizola kod \u010dovjeka raste, to se isto doga\u0111a i kod pasa.<\/p>\n<p>U ljetnim mjesecima najistaknutije me\u0111usobne povezanosti bile su izme\u0111u HCC (hair cortisol concentration \u2014 koncentracija kortizola u dlaci) \u010dovjeka i na\u010dina \u017eivota psa (\u03c72 = 6.268, P = 0.012, <b>2A<\/b>) i izme\u0111u HCC i spola psa (\u03c72 = 5.200, P = 0.023, <b>2B<\/b>).<\/p>\n<p><img decoding=\"async\" alt=\"Zarazni stres: me\u0111usobna uskla\u0111enost razine kortizola kod pasa i njihovih vlasnika\" src=\"\/wp-content\/uploads\/2019\/06\/b84b4f5a39442481f697441bfd9145ac.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Slika br. 2: povezanost HCC i na\u010dina \u017eivota (<b>2A<\/b>); povezanost HCC i spola psa (<b>2B<\/b>).<\/i><\/p>\n<p>Utjecaj na HCC \u010dovjeka imao je sve pse neovisno o spolu i na\u010dinu \u017eivota, ali najja\u010di u\u010dinak imale su \u017eenke i psi koji sudjeluju u natjecanjima.<\/p>\n<p>Zimi je, pak, va\u017enu ulogu imala pasmina (\u03c72 = 6,451, P = 0,011): kod sheltie HCC je bio zna\u010dajno vi\u0161i nego kod border collie (12.905 \u00b1 1.417 naspram 12.069 \u00b1 1.203).<\/p>\n<p><img decoding=\"async\" alt=\"Zarazni stres: me\u0111usobna uskla\u0111enost razine kortizola kod pasa i njihovih vlasnika\" src=\"\/wp-content\/uploads\/2019\/06\/1f20b2a89d57aafb2bfb0cc8c46c8137.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Slika br. 3: povezanost HCC i godi\u0161njeg doba kada su uzeti biolo\u0161ki materijali za analizu.<\/i><\/p>\n<p>Osim gore navedenih faktora, postoje i drugi (radi li vlasnik psa, starost psa, je li \u017eivio s drugim ljubimcima itd.). Me\u0111utim, ti faktori nisu imali gotovo nikakav utjecaj na rezultate, stoga ih istra\u017eiva\u010di nisu uzeli u obzir.<\/p>\n<p>Me\u0111utim, fizi\u010dka aktivnost zaista mo\u017ee utjecati na razinu kortizola u organizmu, pa su znanstvenici odlu\u010dili provjeriti povezanost dugoro\u010dnog nivoa kortizola i aktivnosti pasa. Pra\u0107enje stanja \u010detverono\u017eaca provedeno je putem posebnog ovratnika tijekom 1 tjedna, od kojeg su znanstvenici izdvojili 3 radna i 1 slobodan dan za analizu.<\/p>\n<p>Koli\u010dina vremena koju su psi proveli u stanju umjerene i visoke fizi\u010dke aktivnosti korelirala je s HCC pasa. Pri tome nisu otkrivene zna\u010dajne korelacije ni s ljetnim HCC (N = 44, r = -0,213, P = 0,165), ni sa zimskim HCC (N = 43, r = -0,239, P = 0,122).<\/p>\n<p>Najte\u017ee zapa\u017een faktor utjecaja na razinu kortizola ostao je karakter, odnosno osobine li\u010dnosti psa i njegovog vlasnika. Sudionici istra\u017eivanja ispunili su po 2 upitnika: DPQ (Dog Personality Questionnaire \u2014 upitnik o karakteru psa) i The Big Five Inventory (upitnik o osobnim karakteristikama \u010dovjeka).<\/p>\n<p>Kako se pokazalo, karakter vlasnika sna\u017eno utje\u010de na razinu kortizola ku\u0107nog ljubimca. Tako je pove\u0107ana razina neuroticizma kod \u010dovjeka imala negativan u\u010dinak na HCC psa (ljeto: \u03c72 = 7.951, P = 0.005, \u03b2 = \u22120.364; zima: \u03c72 = 4.919, P = 0.027, \u03b2 = \u22120.026).<\/p>\n<p>Na kraju su znanstvenici provjerili kako sam godi\u0161nje doba utje\u010de na razinu kortizola, s obzirom na to da su uzorci namjerno uzeti ljeti i zimi. Utvr\u0111eno je da je u zimskom razdoblju razina hormona stresa zna\u010dajno vi\u0161a nego ljeti.<\/p>\n<p><img decoding=\"async\" alt=\"Zarazni stres: me\u0111usobna uskla\u0111enost razine kortizola kod pasa i njihovih vlasnika\" src=\"\/wp-content\/uploads\/2019\/06\/194998f2303ae48be56aa708e1bb12af.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Slika br. 4<\/i><\/p>\n<p>Analiza odnosa godi\u0161njeg doba i na\u010dina \u017eivota pokazala je da ku\u0107ni psi imaju vi\u0161u razinu kortizola zimi, dok psi sudionici natjecanja imaju vi\u0161u razinu ljeti (<b>4A<\/b>). Kada je rije\u010d o razlikama me\u0111u spolovima, \u017eenke su pokazale vi\u0161i HCC i zimi i ljeti (<b>4\u0412<\/b>).<\/p>\n<p>Za detaljnije upoznavanje s nijansama istra\u017eivanja preporu\u010dujem da zavirite u <noindex><a rel=\"nofollow\" href=\"https:\/\/www.nature.com\/articles\/s41598-019-43851-x.pdf\">izvje\u0161taj znanstvenika<\/a><\/noindex>.<\/p>\n<h3>Epilog<\/h3>\n<p>\nMe\u0111usobna povezanost psiholo\u0161kih i emocionalnih stanja dvoje ili vi\u0161e jedinki iste vrste koje dugo vremena \u017eive zajedno bila je i ostaje neosporna. \u0160to se ti\u010de me\u0111uspecies sinhronizacije kortizola, nema posebno iznena\u0111uju\u0107ih otkri\u0107a. Ovaj rad nije bio usmjeren na otkri\u0107a, ve\u0107 je bio potreban za potvr\u0111ivanje ranije iznesene teorije da \u010dovjek i pas, kao predstavnici socijalnih vrsta, imaju sna\u017ean utjecaj jedni na druge.<\/p>\n<p>Nau\u010dnici sa Univerziteta u Lin\u010d\u00f6ping (\u0160vedska), koji su proveli ovo istra\u017eivanje, smatraju da su psi projekcija emocionalnog stanja svojih vlasnika. Drugim rije\u010dima, \u010dovjek ima veliki utjecaj na psa u smislu dugoro\u010dne sinhronizacije razine kortizola. Osim toga, tvrde da prethodna sli\u010dna istra\u017eivanja nisu provedena.<\/p>\n<p>Iznena\u0111uje li nas rezultat ovog rada, je li to za nas bila iznena\u0111enje? Radije ne nego da. Me\u0111utim, jo\u0161 jednom smo dobili nau\u010dnu potporu fraze \"mi smo odgovorni za one koje smo pripitomili.\" <\/p>\n<p><b class=\"spoiler_title\">Petak Off-Topic:<\/b><center><div class=\"youtube-placeholder\" data-id=\"-_9AkJ9I2ys\" onclick=\"loadVideo(this)\">\r\n        <img decoding=\"async\" src=\"https:\/\/img.youtube.com\/vi\/-_9AkJ9I2ys\/hqdefault.jpg\" alt=\"Pogledajte video\" loading=\"lazy\" width=\"480\" height=\"360\" style=\"width:100%;height:auto;\">\r\n        <div class=\"play-button\"><\/div>\r\n    <\/div><\/center><\/p>\n<p><center><div class=\"youtube-placeholder\" data-id=\"J4fbjNUTGg4\" onclick=\"loadVideo(this)\">\r\n        <img decoding=\"async\" src=\"https:\/\/img.youtube.com\/vi\/J4fbjNUTGg4\/hqdefault.jpg\" alt=\"Pogledajte video\" loading=\"lazy\" width=\"480\" height=\"360\" style=\"width:100%;height:auto;\">\r\n        <div class=\"play-button\"><\/div>\r\n    <\/div><\/center><\/p>\n<p>Hvala vam na pa\u017enji, ostanite radoznali, volite \u017eivotinje i \u017eelim vam odli\u010dan vikend, ekipo! \ud83d\ude42 <\/p>\n<p>\nHvala \u0161to ste s nama. Svi\u0111a li vam se na\u0161 sadr\u017eaj? \u017delite li vidjeti vi\u0161e zanimljivih materijala? Podr\u017eite nas naru\u010divanjem ili preporu\u010dite prijateljima. <b>30% popusta za korisnike Habr-a na jedinstveni analog entry-level servera, koji smo stvorili za vas:<\/b> <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/company\/ua-hosting\/blog\/347386\/\">Sve \u0161to trebate znati o VPS (KVM) E5-2650 v4 (6 jezgri) 10GB DDR4 240GB SSD 1Gbps od 20$ ili kako pravilno dijeliti server?<\/a><\/noindex> (dostupne opcije s RAID1 i RAID10, do 24 jezgre i do 40GB DDR4).<\/p>\n<p><b>Dell R730xd za pola cijene?<\/b> Samo kod nas <b><noindex><a rel=\"nofollow\" href=\"https:\/\/ua-hosting.company\/serversnl\">2 x Intel TetraDeca-Core Xeon 2x E5-2697v3 2.6GHz 14C 64GB DDR4 4x960GB SSD 1Gbps 100 TB od 199 $<\/a><\/noindex> u Nizozemskoj! <b>Dell R420 \u2014 2x E5-2430 2.2Ghz 6C 128GB DDR3 2x960GB SSD 1Gbps 100TB \u2014 od 99 $!<\/b><\/b> Pro\u010ditajte o tome <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/company\/ua-hosting\/blog\/329618\/\">Kako izgraditi infrastrukturu korporacijske klase koriste\u0107i Dell R730xd E5-2650 v4 servere po cijeni od 9000 eura za sitni\u0161?<\/a><\/noindex><br \/>\n<br \/>Izvor: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/ua-hosting\/blog\/457824\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0427\u0435\u043b\u043e\u0432\u0435\u043a \u2014 \u0441\u0443\u0449\u0435\u0441\u0442\u0432\u043e \u0441\u043e\u0446\u0438\u0430\u043b\u044c\u043d\u043e\u0435. \u041a\u0430\u043a \u0431\u044b \u043e\u0442\u0434\u0435\u043b\u044c\u043d\u044b\u0439 \u0438\u043d\u0434\u0438\u0432\u0438\u0434\u0443\u0443\u043c \u043d\u0438 \u0441\u0442\u0430\u0440\u0430\u043b\u0441\u044f \u0431\u044b\u0442\u044c \u043e\u0431\u043e\u0441\u043e\u0431\u043b\u0435\u043d\u043d\u044b\u043c \u0438\u043b\u0438 \u043e\u0442\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u043d\u044b\u043c, \u043d\u0430 \u043d\u0435\u0433\u043e \u0442\u0430\u043a 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\u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u00ab\u0432\u043d\u0443\u0442\u0440\u0438\u0432\u0438\u0434\u043e\u0432\u0430\u044f\u00bb. \u042d\u0442\u043e \u0437\u043d\u0430\u0447\u0438\u0442, \u0447\u0442\u043e \u043f\u043e\u0434\u043e\u0431\u043d\u0443\u044e \u0440\u0435\u0430\u043a\u0446\u0438\u044e \u043c\u043e\u0436\u043d\u043e \u043d\u0430\u0431\u043b\u044e\u0434\u0430\u0442\u044c \u043d\u0435 \u0442\u043e\u043b\u044c\u043a\u043e \u0432 \u0433\u0440\u0443\u043f\u043f\u0435 \u043b\u044e\u0434\u0435\u0439, [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":26794,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-35758","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.4 - 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