{"id":11397,"date":"2020-08-20T06:29:01","date_gmt":"2020-08-20T06:29:01","guid":{"rendered":"https:\/\/www.lifescienceart.com\/?p=11397"},"modified":"2020-08-20T06:29:01","modified_gmt":"2020-08-20T06:29:01","slug":"hierarchy-of-fear-in-the-savanna","status":"publish","type":"post","link":"https:\/\/www.lifescienceart.com\/ro\/science\/zoology\/hierarchy-of-fear-in-the-savanna\/","title":{"rendered":"Ierarhia fricii \u00een savan\u0103"},"content":{"rendered":"

Ierarhia fricii \u00een savan\u0103<\/h2>\n\n

Ierarhia fricii \u00een savan\u0103<\/h2>\n\n

C\u00e2nd animalele tr\u0103iesc \u00eentr-un habitat plin de pr\u0103d\u0103tori, trebuie s\u0103 fie constant \u00een c\u0103utarea pericolului. \u00cen vastele savane din Africa de Sud, exist\u0103 o clar\u0103 \u201eierarhie a fricii\u201d printre ungulate (animale cu copite) care cutreier\u0103 aceste paji\u0219ti.<\/p>\n\n

Leii, pr\u0103d\u0103torii de v\u00e2rf ai savanei, domnesc supremi \u00een v\u00e2rful acestei ierarhii. Urletele lor \u00eenfrico\u0219\u0103toare trimit fiori pe \u0219ira spin\u0103rii animalelor pr\u0103d\u0103, determin\u00e2ndu-le s\u0103 fug\u0103 pentru siguran\u021b\u0103. C\u00e2inii s\u0103lbatici africani \u0219i gheparzii \u00eei urmeaz\u0103 \u00eendeaproape, provoc\u00e2nd, de asemenea, r\u0103spunsuri puternice de fric\u0103.<\/p>\n\n

R\u0103spunsuri induse de fric\u0103: o problem\u0103 de supravie\u021buire<\/h2>\n\n

Intensitatea r\u0103spunsului de fric\u0103 al unui ungulat depinde de pr\u0103d\u0103torul specific pe care \u00eel \u00eent\u00e2lne\u0219te. De exemplu, impalele, o specie comun\u0103 de prad\u0103 \u00een savan\u0103, se vor repezi la sunetul m\u00e2r\u00e2itului unui leu, dar pot r\u0103m\u00e2ne neperturbate de sunetul unui ghepard.<\/p>\n\n

Aceast\u0103 ierarhie a fricii are un impact profund asupra comportamentului animalelor pr\u0103d\u0103. Frica le guverneaz\u0103 modelele de hr\u0103nire, alegerea habitatului \u0219i chiar strategiile lor reproductive. Prin \u00een\u021belegerea r\u0103spunsurilor induse de fric\u0103 ale ungulatelor, oamenii de \u0219tiin\u021b\u0103 pot ob\u021bine informa\u021bii valoroase despre dinamica complex\u0103 a ecosistemelor de savan\u0103.<\/p>\n\n

Testarea r\u0103spunsurilor de fric\u0103 ale ungulatelor<\/h2>\n\n

Pentru a investiga \u0219tiin\u021bific ierarhia fricii printre ungulate, cercet\u0103torii au efectuat un studiu \u00een Parcul Na\u021bional Greater Kruger. Au \u00eenregistrat sunete de lei, gheparzi \u0219i c\u00e2ini s\u0103lbatici africani, precum \u0219i chem\u0103ri de p\u0103s\u0103ri (un control non-amenin\u021b\u0103tor).<\/p>\n\n

Folosind camere capcan\u0103 echipate cu difuzoare, au redat aceste sunete l\u00e2ng\u0103 punctele de ad\u0103pare, unde animalele sunt cel mai probabil s\u0103 se adune. C\u00e2nd camera detecta mi\u0219care animal\u0103, activa difuzorul pentru a emite un sunet de pr\u0103d\u0103tor \u0219i \u00eenregistra r\u0103spunsul animalului.<\/p>\n\n

Rezultate: o ierarhie clar\u0103 iese la iveal\u0103<\/h2>\n\n

Studiul a dezv\u0103luit o ierarhie distinct\u0103 a fricii printre ungulate. Leii au provocat cel mai puternic r\u0103spuns de fric\u0103, urma\u021bi de c\u00e2inii s\u0103lbatici africani \u0219i apoi de gheparzi. Aceast\u0103 ierarhie se aliniaz\u0103 cu probabilitatea ca un ungulat s\u0103 fie ucis de fiecare specie de pr\u0103d\u0103tor.<\/p>\n\n

Impalele, \u00een ciuda faptului c\u0103 rareori cad prad\u0103 leilor, au prezentat cea mai mare fric\u0103 fa\u021b\u0103 de acest pr\u0103d\u0103tor de v\u00e2rf. Acest lucru sugereaz\u0103 c\u0103 animalele de prad\u0103 evalueaz\u0103 nu numai probabilitatea unui atac, ci \u0219i poten\u021bialele consecin\u021be ale acelui atac.<\/p>\n\n

Excep\u021bii de la ierarhie<\/h2>\n\n

Porcii mistre\u021bi, spre deosebire de alte ungulate, nu au ar\u0103tat nicio preferin\u021b\u0103 \u00een r\u0103spunsul lor de fric\u0103 fa\u021b\u0103 de diferi\u021bi pr\u0103d\u0103tori. Acest lucru se datoreaz\u0103 probabil capacit\u0103\u021bii lor de a se ap\u0103ra \u00eempotriva pr\u0103d\u0103torilor mai mici, cum ar fi c\u00e2inii s\u0103lbatici \u0219i gheparzii.<\/p>\n\n

Implica\u021bii pentru conservare<\/h2>\n\n

\u00cen\u021belegerea ierarhiei fricii printre animalele de prad\u0103 este crucial\u0103 pentru eforturile de conservare. Activit\u0103\u021bile umane, cum ar fi fragmentarea habitatului \u0219i eliminarea pr\u0103d\u0103torilor, pot perturba aceste rela\u021bii naturale pr\u0103d\u0103tor-prad\u0103.<\/p>\n\n

Protej\u00e2nd pr\u0103d\u0103torii \u0219i habitatele lor, putem men\u021bine echilibrul delicat al ecosistemelor de savan\u0103 \u0219i asigura supravie\u021buirea acestor specii iconice de animale s\u0103lbatice.<\/p>\n\n

Efectele \u00een cascad\u0103 ale interac\u021biunilor pr\u0103d\u0103tor-prad\u0103<\/h2>\n\n

Pr\u0103d\u0103torii nu doar ucid prada, ci \u00eei influen\u021beaz\u0103 \u0219i comportamentul \u0219i distribu\u021bia. Un studiu \u00een Kenya a demonstrat c\u0103 riscul de pr\u0103dare din partea leoparzilor \u0219i a c\u00e2inilor s\u0103lbatici modeleaz\u0103 preferin\u021bele de habitat ale impalelor, ceea ce, la r\u00e2ndul s\u0103u, afecteaz\u0103 distribu\u021bia speciilor de copaci \u00een savan\u0103.<\/p>\n\n

Prin urmare, pierderea sau reintroducerea unei specii de pr\u0103d\u0103tori poate avea efecte \u00een cascad\u0103 \u00een \u00eentregul ecosistem, impact\u00e2nd vegeta\u021bia, disponibilitatea apei \u0219i abunden\u021ba altor specii animale.<\/p>\n\n

Concluzie<\/h2>\n\n

Ierarhia fricii \u00een savan\u0103 este un fenomen complex \u0219i dinamic care modeleaz\u0103 comportamentul animalelor pr\u0103d\u0103 \u0219i influen\u021beaz\u0103 \u00eentregul ecosistem. Prin \u00een\u021belegerea acestor r\u0103spunsuri induse de fric\u0103, oamenii de \u0219tiin\u021b\u0103 \u0219i conservatorii pot lucra pentru a proteja aceste ecosisteme fragile \u0219i pentru a asigura supravie\u021buirea faunei s\u0103lbatice incredibile care le locuie\u0219te.<\/p>","protected":false},"excerpt":{"rendered":"

Ierarhia fricii \u00een savan\u0103 Ierarhia fricii \u00een savan\u0103 C\u00e2nd animalele tr\u0103iesc \u00eentr-un habitat plin de pr\u0103d\u0103tori, trebuie s\u0103 fie constant \u00een c\u0103utarea pericolului. \u00cen vastele savane din Africa de Sud,…<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[280],"tags":[254,309,401,219,15432,15431,15433],"class_list":["post-11397","post","type-post","status-publish","format-standard","hentry","category-zoology","tag-wildlife","tag-animal-behavior","tag-conservation","tag-ecology","tag-predator-prey-interactions","tag-fear-response","tag-savanna-ecosystem"],"_links":{"self":[{"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/posts\/11397","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/comments?post=11397"}],"version-history":[{"count":1,"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/posts\/11397\/revisions"}],"predecessor-version":[{"id":11398,"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/posts\/11397\/revisions\/11398"}],"wp:attachment":[{"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/media?parent=11397"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/categories?post=11397"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/tags?post=11397"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}