{"id":4830,"date":"2023-09-29T22:48:58","date_gmt":"2023-09-29T20:48:58","guid":{"rendered":"https:\/\/terraplaza.com\/magazin\/?p=4830"},"modified":"2023-11-25T16:31:02","modified_gmt":"2023-11-25T15:31:02","slug":"a-misztikus-melytenger-vilaga-a-torfarku-rak","status":"publish","type":"post","link":"https:\/\/terraplaza.com\/magazin\/hu\/izeltlabuak-hu\/a-misztikus-melytenger-vilaga-a-torfarku-rak\/4830\/","title":{"rendered":"A misztikus m\u00e9lytenger vil\u00e1ga: a t\u0151rfark\u00fa r\u00e1k\u00a0"},"content":{"rendered":"\n<p><strong>A t\u0151rfark\u00fa r\u00e1kokat joggal nevezhetj\u00fck \u00e9l\u0151 k\u00f6v\u00fcleteknek, ugyanis m\u00e1r 300 milli\u00f3 \u00e9ve szinte v\u00e1ltozatlan form\u00e1ban vannak jelen a F\u00f6ld\u00f6n. Ez azt jelenti, hogy m\u00e1r a dinoszauruszok el\u0151tt megjelent els\u0151, a maihoz hasonlatos alakjuk. Azonban ma m\u00e1r lassan a kihal\u00e1s sz\u00e9l\u00e9re sodr\u00f3dnak, ugyanis \u00e9l\u0151hely\u00fck cs\u00f6kken\u00e9se mellett az emberek is t\u00fal sok p\u00e9ld\u00e1nyt fognak be. Ez az\u00e9rt van, mert az \u00e1llat v\u00e9re egy koagulog\u00e9n nev\u0171 feh\u00e9rj\u00e9t tartalmaz, amelyhez hasonl\u00f3t m\u00e9g nem siker\u00fclt szintetiz\u00e1lni a tud\u00f3soknak, illetve kedvelt \u00e1llat a prepar\u00e1torok k\u00f6reiben is.<\/strong><\/p>\n\n\n\n<p>Azok a tengeri \u00edzeltl\u00e1b\u00faak, melyek a mai t\u0151rfark\u00fa r\u00e1kokhoz hasonl\u00f3 form\u00e1t mutatnak, m\u00e1r az Ordov\u00edcium korban (485,4 milli\u00f3 \u00e9s 443,8 milli\u00f3 \u00e9vvel ezel\u0151tt) megjelentek a F\u00f6ld\u00f6n. Rendk\u00edv\u00fcl \u0151si csoportr\u00f3l van sz\u00f3, hiszen ebben az id\u0151szakban sem eml\u0151s\u00f6k, sem madarak, sem h\u00fcll\u0151k nem voltak m\u00e9g jelen, \u00e9s a k\u00e9t\u00e9lt\u0171ek megjelen\u00e9s\u00e9re is m\u00e9g sz\u00e1zmilli\u00f3 \u00e9vig kellett v\u00e1rni. Teh\u00e1t nem igaz\u00e1n volt m\u00e9g \u00e9let a sz\u00e1razf\u00f6ld\u00f6n. Annak ellen\u00e9re, hogy a nev\u00fck a r\u00e1kokra utal, rendszertanilag ink\u00e1bb a skorpi\u00f3khoz \u00e9s a p\u00f3kokhoz \u00e1llnak k\u00f6zelebb. Ennek oka, hogy a cs\u00e1pr\u00e1g\u00f3sok (<em>Chelicerata<\/em>) alt\u00f6rzs\u00e9be tartoznak, amely a p\u00f3kszab\u00e1s\u00faakkal k\u00f6z\u00f6s. Ezen bel\u00fcl pedig a r\u00e1kszab\u00e1s\u00faak (<em>Merostomata<\/em>) oszt\u00e1ly\u00e1ba sorolj\u00e1k \u0151ket [1].<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"960\" height=\"540\" src=\"https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR1.png\" alt=\"\" class=\"wp-image-4840\" srcset=\"https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR1.png 960w, https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR1-300x169.png 300w, https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR1-768x432.png 768w, https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR1-150x84.png 150w, https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR1-450x253.png 450w\" sizes=\"(max-width: 960px) 100vw, 960px\" \/><figcaption class=\"wp-element-caption\">Fot\u00f3: Reuters &#8211; Mike Segar<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Fel\u00e9p\u00edt\u00e9se<\/h2>\n\n\n\n<p>Test\u00fcket 3 r\u00e9szre lehet tagolni: els\u0151 r\u00e9sze a prosoma, azaz az el\u0151test, amib\u0151l az angol \u201ehorseshoe crab\u201d vagyis l\u00f3patk\u00f3 r\u00e1k elnevez\u00e9s\u00fck ered. Ez a test\u00fck legnagyobb r\u00e9sze, ahol az idegrendszeri k\u00f6zpontjuk \u00e9s a szervek nagy r\u00e9sze tal\u00e1lhat\u00f3, amit egy lemez v\u00e9d. Az \u00e1llatnak t\u00edz szeme van, k\u00fcl\u00f6nb\u00f6z\u0151 helyeken a test\u00e9n, de ezeken k\u00edv\u00fcl is vannak m\u00e9g f\u00e9ny\u00e9rz\u00e9kel\u0151 receptoraik a \u201efarok\u201d, az a telson k\u00f6zel\u00e9ben [2]. Az el\u0151test sim\u00e1n \u00edvelt fels\u0151 fel\u00fclet\u00e9n helyezkedik el egy p\u00e1r oldals\u00f3 \u00f6sszetett szem \u00e9s egy sokkal kisebb k\u00f6z\u00e9ps\u0151 szemp\u00e1r, amelyek k\u00e9pesek \u00e9rz\u00e9kelni az ultraibolya f\u00e9nyt. Ezek fontos szerepet j\u00e1tszanak a p\u00e1rkeres\u00e9sben, m\u00edg az \u00e1llat t\u00f6bbi szeme ink\u00e1bb a f\u00e9ny v\u00e1ltoz\u00e1sait, a mozg\u00e1st \u00e9s a holdf\u00e9nyt \u00e9rz\u00e9keli [3] [1]. A el\u0151test alatt hat p\u00e1r v\u00e9gtag tal\u00e1lhat\u00f3: az els\u0151 p\u00e1r az \u00fagynevezett cs\u00e1pr\u00e1g\u00f3k (chelicereae), amelyek kiz\u00e1r\u00f3lag a f\u00e9rgek, v\u00e9kony h\u00e9j\u00fa puhatest\u0171ek, r\u00e1kok \u00e9s m\u00e1s zs\u00e1km\u00e1ny\u00e1llatok megragad\u00e1s\u00e1ra szolg\u00e1l. A k\u00f6vetkez\u0151 p\u00e1r az \u00e1llkapcsi tapogat\u00f3k (pedipalpus), amelyek a h\u00edmekn\u00e9l a p\u00f3kokhoz hasonl\u00f3an a p\u00e1rz\u00e1sban vesznek r\u00e9szt. Az ut\u00e1nuk k\u00f6vetkez\u0151 n\u00e9gy l\u00e1bp\u00e1r m\u00e1r igazi j\u00e1r\u00f3l\u00e1b, a helyv\u00e1ltoztat\u00e1st szolg\u00e1lj\u00e1k. Az utols\u00f3 l\u00e1bak t\u00f6ve m\u00f6g\u00f6tt egy p\u00e1r elcs\u00f6kev\u00e9nyesedett f\u00fcggel\u00e9k, az \u00fagynevezett chilaria tal\u00e1lhat\u00f3.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"605\" height=\"256\" src=\"https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR2.png\" alt=\"\" class=\"wp-image-4839\" srcset=\"https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR2.png 605w, https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR2-300x127.png 300w, https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR2-150x63.png 150w, https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR2-450x190.png 450w\" sizes=\"(max-width: 605px) 100vw, 605px\" \/><\/figure>\n\n\n\n<p>A test k\u00f6z\u00e9ps\u0151 hasi r\u00e9sze az ut\u00f3test (opisthosoma), amely h\u00e1romsz\u00f6g alak\u00fa, oldalain t\u00fcsk\u00e9k helyezkednek el. Ezek a t\u00fcsk\u00e9k mozgathat\u00f3ak, \u00e9s az \u00e1llat v\u00e9delm\u00e9t szolg\u00e1lj\u00e1k.&nbsp; A has als\u00f3 r\u00e9sz\u00e9n a mozgat\u00f3 izmok \u00e9s a l\u00e9gz\u00e9shez haszn\u00e1lt kopolty\u00fak tal\u00e1lhat\u00f3k [1] [3].<\/p>\n\n\n\n<p>A harmadik r\u00e9sz a farok, a telson, amely form\u00e1j\u00e1t tekintve nagyon hasonl\u00edt egy t\u0151rre, innen kapta az \u00e1llat magyar elnevez\u00e9s\u00e9t is. A telson hossz\u00fa \u00e9s hegyes, els\u0151re tal\u00e1n f\u00e9lelmetesnek is t\u0171nhet, azonban nem vesz\u00e9lyes, nem rendelkezik m\u00e9reganyaggal sem. Funcki\u00f3j\u00e1t tekintve az \u00e1llat arra haszn\u00e1lja, hogy meg tudja mag\u00e1t ford\u00edtani abban az esetben, ha a h\u00e1t\u00e1ra fordulna. <\/p>\n\n\n\n<p>A n\u0151st\u00e9nyek nagyobbak, mint a h\u00edmek: a legnagyobb ismert faj, a<em> Limulus polyphemus<\/em> n\u0151st\u00e9nyei fej\u00fckt\u0151l a farokig 46-48 centim\u00e9teres hossz\u00fas\u00e1got k\u00e9pesek el\u00e9rni, m\u00edg a h\u00edmek k\u00f6r\u00fclbel\u00fcl 36-38 centim\u00e9ter hossz\u00fara n\u0151nek meg [3].<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/AdobeStock_274186012-1024x683.jpeg\" alt=\"\" class=\"wp-image-4847\" srcset=\"https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/AdobeStock_274186012-1024x683.jpeg 1024w, https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/AdobeStock_274186012-300x200.jpeg 300w, https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/AdobeStock_274186012-768x512.jpeg 768w, https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/AdobeStock_274186012-1536x1024.jpeg 1536w, https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/AdobeStock_274186012-2048x1365.jpeg 2048w, https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/AdobeStock_274186012-150x100.jpeg 150w, https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/AdobeStock_274186012-450x300.jpeg 450w, https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/AdobeStock_274186012-1200x800.jpeg 1200w, https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/AdobeStock_274186012-1320x880.jpeg 1320w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">Fot\u00f3: galitskaya \u2013 stock.adobe.com<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u00d6sszesen 4 t\u0151rfark\u00fa fajt k\u00fcl\u00f6nb\u00f6ztet\u00fcnk meg<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>Latin n\u00e9v<\/strong><\/td><td><strong>Magyar elnevez\u00e9s<\/strong><\/td><td><strong>\u00c9l\u0151hely<\/strong><\/td><\/tr><tr><td><em><strong>Carcinoscorpius rotundicauda<\/strong><\/em><\/td><td>Mangrove t\u0151rfark\u00fa r\u00e1k<\/td><td>D\u00e9l- \u00e9s D\u00e9lkelet-\u00c1zsia<\/td><\/tr><tr><td><em><strong>Limulus polyphemus<\/strong><\/em><\/td><td>Atlanti vagy amerikai t\u0151rfark\u00fa r\u00e1k<\/td><td>Egyes\u00fclt \u00c1llamok atlanti partvid\u00e9ke \u00e9s a Mexik\u00f3i-\u00f6b\u00f6l d\u00e9lkeleti r\u00e9sze<\/td><\/tr><tr><td><em><strong>Tachypleus<\/strong><\/em><br><em><strong>gigas<\/strong><\/em><\/td><td>Indo-csendes-\u00f3ce\u00e1ni, indon\u00e9ziai, indiai vagy d\u00e9li t\u0151rfark\u00fa r\u00e1k<\/td><td>D\u00e9l- \u00e9s D\u00e9lkelet-\u00c1zsia<\/td><\/tr><tr><td><em><strong>Tachypleus tridentatus<\/strong><\/em><\/td><td>K\u00ednai vagy jap\u00e1n t\u0151rfark\u00fa r\u00e1k<\/td><td>D\u00e9lkelet- \u00e9s Kelet-\u00c1zsia<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">T\u00e1pl\u00e1lkoz\u00e1sa<\/h2>\n\n\n\n<p>A t\u0151rfark\u00fa r\u00e1kok legink\u00e1bb f\u00e9rgekkel, kagyl\u00f3kkal, puhatest\u0171ekkel \u00e9s elpusztult halakkal t\u00e1pl\u00e1lkoznak, de id\u0151nk\u00e9nt alg\u00e1t is fogyasztanak. A t\u00e1pl\u00e1l\u00e9kot l\u00e1baikkal a sz\u00e1jukhoz h\u00fazz\u00e1k, majd a sz\u00e1jny\u00edl\u00e1st k\u00f6r\u00fclvev\u0151 f\u00fcggel\u00e9kekkel veszik fel [3].<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Szaporod\u00e1sa, \u00e9letciklusai<\/h2>\n\n\n\n<p>M\u00e9lytengeri \u00e9letm\u00f3djuk ellen\u00e9re szaporodni felj\u00f6nnek a felsz\u00ednre, ami a k\u00e9s\u0151 tavaszi \u00e9s kora ny\u00e1ri id\u0151szakra esik. A h\u00edmek \u00e9rkeznek meg el\u0151sz\u00f6r, majd v\u00e1rnak a n\u0151st\u00e9nyekre. Amikor a n\u0151st\u00e9nyek a partra \u00e9rnek, a h\u00edmeket vonz\u00f3 illatanyagokat, \u00fagynevezett feromonokat bocs\u00e1tanak ki, \u00e9s ezzel jelzik, hogy itt az ideje a p\u00e1rz\u00e1snak. Legink\u00e1bb \u00e9jszaka, dag\u00e1ly idej\u00e9n, valamint \u00faj- \u00e9s teliholdkor p\u00e1rosodnak. P\u00e1rz\u00e1skor a kisebb h\u00edm a nagyobb n\u0151st\u00e9ny p\u00e1nc\u00e9lj\u00e1nak tetej\u00e9re kapaszkodik speci\u00e1lis el\u00fcls\u0151 karmaival a v\u00edzben, \u00e9s egy\u00fctt k\u00fasznak a partra. A parton a n\u0151st\u00e9ny kis m\u00e9lyed\u00e9seket \u00e1s, ahov\u00e1 t\u00f6bb ezer pet\u00e9t rak le, majd a h\u00edm ezut\u00e1n h\u00edmivarsejtjeivel befedi azokat. A f\u00e9szkek \u00e1ltal\u00e1ban k\u00f6zvetlen\u00fcl a magas v\u00edz\u00e1ll\u00e1s alatt vannak. Ezt a folyamatot minden p\u00e1r t\u00f6bbsz\u00f6r is megism\u00e9telheti t\u00f6bb t\u00edzezer pet\u00e9vel [2] [3].<\/p>\n\n\n\n<p>A p\u00e1rz\u00e1si id\u0151szak befejezt\u00e9vel a kifejlett t\u0151rfark\u00faak visszat\u00e9rnek az \u00f3ce\u00e1n m\u00e9ly\u00e9re, eg\u00e9szen a k\u00f6vetkez\u0151 tavaszig. A pet\u00e9k sz\u00e1mos tengerparti mad\u00e1r, v\u00e1ndormad\u00e1r, tekn\u0151s \u00e9s hal t\u00e1pl\u00e1l\u00e9k\u00e1ul szolg\u00e1lnak.<\/p>\n\n\n\n<p>A kikelt l\u00e1rv\u00e1k nagyon hasonl\u00f3ak a feln\u0151tt p\u00e9ld\u00e1nyokhoz, de telsonjuk m\u00e9g nagyon apr\u00f3. A l\u00e1rv\u00e1k \u00e9let\u00fck els\u0151 \u00e9v\u00e9t a sek\u00e9ly ter\u00fcletek homokos alj\u00e1n t\u00e1pl\u00e1lkozva t\u00f6ltik, \u00e9s ahogyan fejl\u0151dnek, \u00fagy v\u00e1ndorolnak az egyre m\u00e9lyebb vizekbe. A k\u00f6vetkez\u0151 10 \u00e9vet vedl\u00e9ssel \u00e9s t\u00e1pl\u00e1lkoz\u00e1ssal t\u00f6ltik. Teljes kifejl\u0151d\u00e9s\u00fck nagyj\u00e1b\u00f3l 16-17 \u00e9vet vesz ig\u00e9nybe. Az ivar\u00e9retts\u00e9get 9-12 \u00e9vesen \u00e9rik el, \u00e9s \u00f6sszesen kb. 20 \u00e9vig \u00e9lnek [3].<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u00c1ld\u00e1s vagy \u00e1tok?<\/h2>\n\n\n\n<p>A t\u0151rfark\u00fa r\u00e1kok szervezete rendk\u00edv\u00fcl ellen\u00e1ll\u00f3 a k\u00f3rokoz\u00f3kkal szemben. Tal\u00e1n ez lehet az oka, hogy \u00e9vmilli\u00f3kon kereszt\u00fcl v\u00e1ltozatlan form\u00e1ban tudtak fennmaradni, m\u00edg k\u00f6r\u00fcl\u00f6tt\u00fck komplett \u00f6kosziszt\u00e9m\u00e1k t\u0171ntek fel, vir\u00e1gzottak \u00e9s pusztultak el. A v\u00e9dekez\u00e9s a nyitott kering\u00e9si rendszer\u00fckbe nagyon k\u00f6nnyen bejut\u00f3 k\u00f3rokoz\u00f3k ellen alakult ki. V\u00e9r\u00fcknek sz\u00fcrk\u00e9s sz\u00edne van, azonban ha leveg\u0151vel \u00e9rintkezik, akkor a l\u00e9gk\u00f6ri oxig\u00e9n hat\u00e1s\u00e1ra ink\u00e1bb k\u00e9k sz\u00edn\u0171v\u00e9 v\u00e1lik, ami a r\u00e9ztartalm\u00e1nak k\u00f6sz\u00f6nhet\u0151. A v\u00e9r\u00fckben az emberi feh\u00e9rv\u00e9rsejtekhez hasonl\u00f3, \u00fagynevezett am\u0151bocit\u00e1k vannak, amelyek funkci\u00f3jukat tekintve az am\u0151b\u00e1khoz hasonl\u00f3an \u00e1ll\u00e1bakkal mozg\u00f3 v\u00e9dekez\u0151 sejtek. Az am\u0151bocit\u00e1k azonnal m\u0171k\u00f6d\u00e9sbe l\u00e9pnek, ha k\u00f3rokoz\u00f3 jelenl\u00e9t\u00e9t \u00e9rz\u00e9kelik, majd ezt k\u00f6vet\u0151en kibocs\u00e1jtj\u00e1k a koagulog\u00e9n nev\u0171 feh\u00e9rj\u00e9t, amely g\u00e9les burkot k\u00e9pez a bakt\u00e9rium k\u00f6r\u00fcl, ezzel mozg\u00e1sk\u00e9ptelenn\u00e9 t\u00e9ve azt [1].<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"502\" height=\"332\" src=\"https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR3.png\" alt=\"\" class=\"wp-image-4838\" srcset=\"https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR3.png 502w, https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR3-300x198.png 300w, https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR3-150x99.png 150w, https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR3-450x298.png 450w\" sizes=\"(max-width: 502px) 100vw, 502px\" \/><figcaption class=\"wp-element-caption\">A jap\u00e1n t\u0151rfark\u00fa (Tachypleus tridentatus) koagulog\u00e9n feh\u00e9rj\u00e9je [4]<\/figcaption><\/figure>\n\n\n\n<p>Emiatt lettek a t\u0151rfark\u00fa r\u00e1kok rendk\u00edv\u00fcl fontosak a gy\u00f3gyszeripar sz\u00e1m\u00e1ra. 1956-ban Frederick Bang amerikai tud\u00f3s felfedezte a koagulog\u00e9n nev\u0171 feh\u00e9rj\u00e9t, ezzel lehet\u0151v\u00e9 t\u00e9ve kutat\u00f3t\u00e1rsa, Jack Levin hematol\u00f3gus sz\u00e1m\u00e1ra a \u201eLimulus Amebocyte Lysate\u201d (LAL) teszt kifejleszt\u00e9s\u00e9t. A teszt a Gram-negat\u00edv bakt\u00e9riumok \u00e9s m\u00e1s szennyez\u0151 anyagok kimutat\u00e1s\u00e1ra szolg\u00e1l, amelyek a szervezetbe bejuttatott folyad\u00e9kokban (p\u00e9ld\u00e1ul gy\u00f3gyszerek \u00e9s intrav\u00e9n\u00e1s oldatok) vagy az orvosi m\u0171szerek \u00e9s tart\u00e1lyok fel\u00fclet\u00e9n jelenhetnek meg. Az Egyes\u00fclt \u00c1llamok \u00c9lelmiszer- \u00e9s Gy\u00f3gyszer\u00fcgyi Hivatala el\u0151sz\u00f6r 1977-ben enged\u00e9lyezte a teszt haszn\u00e1lat\u00e1t. Amikor ezek a szennyez\u0151k kapcsolatba ker\u00fclnek az LAL-lal, a koagulog\u00e9n reag\u00e1l a Gram-negat\u00edv bakt\u00e9riumokkal vagy az endotoxinnal (a bakt\u00e9rium sejtfal\u00e1hoz k\u00f6t\u00f6tt m\u00e9rgez\u0151 anyag), \u00e9s ak\u00e1r egy trilli\u00f3 r\u00e9szecske koncentr\u00e1ci\u00f3ban is g\u00e9lt k\u00e9pez k\u00f6r\u00fcl\u00f6tt\u00fck. Ez azt jelenti, hogy egy ezer k\u00f6bm\u00e9teres medenc\u00e9ben ak\u00e1r egy milliliternyi toxin is kimutathat\u00f3 lesz. A bakt\u00e9riumok jelenl\u00e9t\u00e9t vizsg\u00e1l\u00f3 m\u00e1s m\u00f3dszerekhez k\u00e9pes a LAL-teszt gyors: k\u00f6r\u00fclbel\u00fcl 45 percen bel\u00fcl v\u00e1laszt ad. A koagulog\u00e9n kinyer\u00e9s\u00e9hez azonban v\u00e9rt kell lecsapolni a m\u00e9g \u00e9l\u0151 t\u0151rfark\u00faakb\u00f3l, amelyeknek \u00edgy a v\u00e9rz\u00e9sb\u0151l ered\u0151 hal\u00e1loz\u00e1si ar\u00e1nya nagyj\u00e1b\u00f3l 30 sz\u00e1zal\u00e9k [1].<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"612\" height=\"417\" src=\"https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR4.png\" alt=\"\" class=\"wp-image-4837\" srcset=\"https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR4.png 612w, https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR4-300x204.png 300w, https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR4-150x102.png 150w, https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR4-450x307.png 450w\" sizes=\"(max-width: 612px) 100vw, 612px\" \/><figcaption class=\"wp-element-caption\">Kromog\u00e9n endotoxin vizsg\u00e1lati reagensek [5]<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Mi az a Gram-negat\u00edv bakt\u00e9rium?<\/h2>\n\n\n\n<p>A Gram-negat\u00edv bakt\u00e9riumok olyan mikroorganizmusok, amelyeket a Gram-sz\u00ednez\u00e9s nev\u0171 laborat\u00f3riumi m\u00f3dszerrel lehet azonos\u00edtani. A Gram-sz\u00ednez\u00e9s egy olyan elj\u00e1r\u00e1s, amely seg\u00edt megk\u00fcl\u00f6nb\u00f6ztetni a bakt\u00e9riumok sejtfal\u00e1nak k\u00e9miai szerkezet\u00e9t. A Gram-negat\u00edv bakt\u00e9riumok azok a bakt\u00e9riumok, amelyek a k\u00e9k-piros sz\u00ednez\u00e9st k\u00f6vet\u0151en k\u00e9kessz\u00fcrke sz\u00ednt fognak mutatni a mikroszk\u00f3p alatt. A bakt\u00e9riumok rendk\u00edv\u00fcl nagy fajgazdags\u00e1ggal rendelkeznek \u00e9s sz\u00e1mos k\u00f3rokoz\u00f3 is megtal\u00e1lhat\u00f3 k\u00f6z\u00f6tt\u00fck. Ilyen p\u00e9ld\u00e1ul az <em>Escherichia coli<\/em> (<em>E. coli<\/em>), a <em>Salmonella<\/em>, a <em>Pseudomonas<\/em>, \u00e9s a <em>Neisseria<\/em>&nbsp; [6].<\/p>\n\n\n\n<p>Ezeknek a bakt\u00e9riumoknak a k\u00fcls\u0151 h\u00e1rty\u00e1ja gazdag egy lipopoliszacharidnak nevezett molekul\u00e1ban. Abban az esetben, ha ilyen bakt\u00e9riumok ker\u00fclnek be a v\u00e9r\u00e1ramba, a lipopoliszacharidok sz\u00e1mos k\u00f3ros folyamatot ind\u00edthatnak el, p\u00e9ld\u00e1ul magas l\u00e1zat \u00e9s v\u00e9rnyom\u00e1ses\u00e9st okozhatnak. Ezek miatt a lipopoliszacharidot gyakran endotoxink\u00e9nt eml\u00edtik. [7].<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"405\" src=\"https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR5.png\" alt=\"\" class=\"wp-image-4836\" srcset=\"https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR5.png 600w, https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR5-300x203.png 300w, https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR5-150x101.png 150w, https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR5-450x304.png 450w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><figcaption class=\"wp-element-caption\">Gram-pozit\u00edv l\u00e9pfenebacilusok (Bacillus anthracis)<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Mik azok az endotoxinok?<\/h2>\n\n\n\n<p>Az endotoxinok olyan lipopoliszacharidok (LPS), amelyek egy hidrofil poliszacharidb\u00f3l \u00e9s egy lipofil lipiddom\u00e9nb\u0151l \u00e1llnak. A lipopoliszacharidok a Gram-negat\u00edv bakt\u00e9riumok f\u0151 felsz\u00edni antig\u00e9njei, amelyek a gyullad\u00e1sos reakci\u00f3k er\u0151s serkent\u0151i. M\u00e1r nagyon alacsony koncentr\u00e1ci\u00f3ban is kifejtik hat\u00e1sukat, \u00e9s r\u00e9szt vesznek a szepszis, a szeptikus sokk \u00e9s az endotox\u00e9mia patogenezis\u00e9ben. Az LPS a bakt\u00e9riumok sejtfal\u00e1b\u00f3l szabadul fel, amikor antibiotikumok vagy a komplementrendszer elpuszt\u00edtja azokat. A kering\u00e9si rendszerbe ker\u00fcl\u0151 LPS beind\u00edtja a monocit\u00e1k \u00e9s makrof\u00e1gok gyullad\u00e1sos v\u00e1lasz\u00e1t, ami olyan pro-inflammatorikus citokinek, mint a TNF-\u03b1 \u00e9s az IL-1\u03b2 termel\u00e9s\u00e9hez vezet. Ezen fel\u00fcl aktiv\u00e1lja az adapt\u00edv immunv\u00e1laszhoz sz\u00fcks\u00e9ges ko-stimul\u00e1l\u00f3 molekul\u00e1k termel\u00e9s\u00e9t is. S\u00falyos esetekben azonban a gyullad\u00e1s elszabadul, \u00e9s v\u00e9g\u00fcl szepszishez vagy szervi el\u00e9gtelens\u00e9ghez vezethet [8], [9].<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"606\" height=\"346\" src=\"https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR6.png\" alt=\"\" class=\"wp-image-4835\" srcset=\"https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR6.png 606w, https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR6-300x171.png 300w, https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR6-150x86.png 150w, https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR6-450x257.png 450w\" sizes=\"(max-width: 606px) 100vw, 606px\" \/><figcaption class=\"wp-element-caption\">A v\u00e9rben l\u00e9v\u0151 LPS aktiv\u00e1lja a monocit\u00e1kat (feh\u00e9rv\u00e9rsejteket), ami gyullad\u00e1sos medi\u00e1torok kiv\u00e1laszt\u00e1s\u00e1hoz vezet. Sziszt\u00e9m\u00e1s gyullad\u00e1sban ez t\u00f6bb szervi el\u00e9gtelens\u00e9ghez \u00e9s szepszishez vezethet [8].<\/figcaption><\/figure>\n\n\n\n<p>A t\u0151rfark\u00fa r\u00e1kok vad\u00e1szata nem most kezd\u0151d\u00f6tt. M\u00e1r a XIX. sz\u00e1zadban is milli\u00f3sz\u00e1mra fogt\u00e1k ki p\u00e1rz\u00e1si id\u0151szakban a part menti vizekben hever\u0151 \u00e1llatokat, hogy tr\u00e1gy\u00e1z\u00e1sra haszn\u00e1lj\u00e1k \u0151ket. 1603-ban Samuel De Champlain francia felfedez\u0151 \u00e9szrevette, hogy az amerikai \u0151slakosok elpusztult p\u00e9ld\u00e1nyokat \u00e1stak be a kukoricamez\u0151kbe, amit a telepesek is \u00e1tvettek. Amikor az USA a XIX. sz\u00e1zad v\u00e9ge fel\u00e9 megindult az iparosod\u00e1s ir\u00e1ny\u00e1ba, n\u00e9h\u00e1ny tengerparti v\u00e1llalat \u00fagy d\u00f6nt\u00f6tt, hogy nagy \u00fczletet csin\u00e1l ebb\u0151l. Ahelyett, hogy a mocsaras partokon g\u00e1zolva gy\u0171jt\u00f6tt\u00e9k volna be a r\u00e1kokat, mint el\u0151deik, ink\u00e1bb t\u0151rfark\u00fa-\u201ekik\u00f6t\u0151ket\u201d \u00e9p\u00edtettek New Jersey \u00e9s Delaware partjain\u00e1l. Amikor az ap\u00e1ly levonult, h\u00e1l\u00f3k, dr\u00f3toszlopok \u00e9s f\u00e1b\u00f3l k\u00e9sz\u00fclt platformok egy\u00fcttese k\u00e9nyszer\u00edtette az \u00edv\u00f3 \u00e1llatokat a ketrecekbe. A legt\u00f6bb esetben a munk\u00e1sok ezut\u00e1n \u00f6sszegy\u0171jt\u00f6tt\u00e9k, \u00e9s a partvonal ment\u00e9n sz\u00e9pen egym\u00e1sra halmozt\u00e1k \u0151ket, hogy kisz\u00e1radva elpusztuljanak [10]. Miut\u00e1n v\u00e9geztek a strandon, egy feldolgoz\u00f3\u00fczembe k\u00fcldt\u00e9k \u0151ket, porr\u00e1 \u0151r\u00f6lt\u00e9k, \u00e9s \u201ecancerine\u201d nev\u0171 m\u0171tr\u00e1gyak\u00e9nt \u00e1rult\u00e1k.<\/p>\n\n\n\n<figure class=\"wp-block-pullquote\"><blockquote><p>T\u0151rfark\u00faak milli\u00f3i pusztultak el, miel\u0151tt a mesters\u00e9ges m\u0171tr\u00e1gy\u00e1k az 1970-es \u00e9vekben fokozatosan felv\u00e1ltott\u00e1k ezt a gyakorlatot.<\/p><\/blockquote><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"618\" height=\"403\" src=\"https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR7.png\" alt=\"\" class=\"wp-image-4834\" srcset=\"https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR7.png 618w, https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR7-300x196.png 300w, https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR7-150x98.png 150w, https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR7-450x293.png 450w\" sizes=\"(max-width: 618px) 100vw, 618px\" \/><figcaption class=\"wp-element-caption\">K\u00e9p forr\u00e1sa: Delaware Public Archives<\/figcaption><\/figure>\n\n\n\n<p>A keleti part ment\u00e9n \u00f6t v\u00e1llalat (amelyek D\u00e9l-Karolin\u00e1ban, New Jerseyben, Massachusettsben, Virgini\u00e1ban \u00e9s Marylandben m\u0171k\u00f6dnek) uralja a t\u0151rfark\u00fa r\u00e1kok lecsapol\u00e1s\u00e1nak piac\u00e1t, \u00e9s jelent\u0151s profitot termelnek ezen az \u00fczleten. Miut\u00e1n a t\u0151rfark\u00faakat kifogt\u00e1k a sek\u00e9ly vizekb\u0151l, azokat speci\u00e1lis ac\u00e9lpultokon helyezik el a v\u00e9rv\u00e9telhez. Ezt k\u00f6vet\u0151en bemetsz\u00e9st ejtenek az \u00e1llat test\u00e9n a sz\u00edvhez k\u00f6zel, majd a v\u00e9r\u00fcket \u00fcvegekbe csurgatj\u00e1k. Egy liter kinyert LAL-reagens \u00e9rt\u00e9ke meghaladja a 15 ezer doll\u00e1rt. Ez jelenlegi \u00e1rfolyamon sz\u00e1molva t\u00f6bb mint 5 milli\u00f3 forintot jelent. Fontos megjegyezni, hogy az \u00e1llatoknak ez az elj\u00e1r\u00e1s nem felt\u00e9tlen\u00fcl jelenti a biztos hal\u00e1lt, mivel a fenntarthat\u00f3s\u00e1g elveit k\u00f6vetve a kiszedett p\u00e9ld\u00e1nyokat 24 \u201372 \u00f3r\u00e1n bel\u00fcl visszahelyezik a v\u00edzbe, az eredeti fog\u00e1si ter\u00fclett\u0151l messze. Ezzel pr\u00f3b\u00e1lj\u00e1k elker\u00fclni, hogy ugyanazokat a t\u0151rfark\u00faakat r\u00f6vid id\u0151n bel\u00fcl ism\u00e9t befogj\u00e1k [11] [12].<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"613\" height=\"408\" src=\"https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR8.png\" alt=\"\" class=\"wp-image-4833\" srcset=\"https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR8.png 613w, https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR8-300x200.png 300w, https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR8-150x100.png 150w, https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR8-450x300.png 450w\" sizes=\"(max-width: 613px) 100vw, 613px\" \/><figcaption class=\"wp-element-caption\">T\u0151rfark\u00fa r\u00e1kok kiv\u00e9reztet\u00e9se egy charlestoni l\u00e9tes\u00edtm\u00e9nyben, S.C. \u00e1llamban, 2014 j\u00fanius\u00e1ban. &#8211; Fot\u00f3: Ariane M\u00fcller<\/figcaption><\/figure>\n\n\n\n<p>Ma m\u00e1r van egy olyan min\u0151s\u00e9g\u0171 szintetikus alternat\u00edv\u00e1nk, amelyet Eur\u00f3p\u00e1ban a LAL-al egyen\u00e9rt\u00e9k\u0171 tesztanyagk\u00e9nt min\u0151s\u00edtettek, azaz t\u00f6bb\u00e9 nincs sz\u00fcks\u00e9g\u00fcnk az \u00e9l\u0151 \u00e1llatok v\u00e9r\u00e9re. Az Egyes\u00fclt \u00c1llamokban ennek ellen\u00e9re nem cs\u00f6kken a gy\u0171jt\u00e9s, hanem n\u00f6vekszik. 2021-ben t\u00f6bb mint 700.000 t\u0151rfark\u00fa v\u00e9r\u00e9t csapolt\u00e1k le. Ez t\u00f6bb, mint eddig b\u00e1rmelyik \u00e9vben az\u00f3ta, hogy a hat\u00f3s\u00e1gok 2004-ben elkezdtek nyilv\u00e1ntart\u00e1st vezetni a felhaszn\u00e1lt \u00e1llatokr\u00f3l. Mi\u00f3ta megjelent az \u00faj, LAL-t helyettes\u00edt\u0151 tesztanyag, a kihal\u00e1szott r\u00e1kok sz\u00e1ma t\u00f6bb mint k\u00e9tszeres\u00e9re n\u0151tt. \u00c9vente legal\u00e1bb 80 milli\u00f3 vizsg\u00e1latot v\u00e9geznek el vil\u00e1gszerte a t\u0151rfark\u00fa v\u00e9rb\u0151l kinyert koagulog\u00e9n felhaszn\u00e1l\u00e1s\u00e1val.<\/p>\n\n\n\n<p>Az ipar\u00e1g illet\u00e9kesei ragaszkodnak ahhoz, hogy viszonylag kev\u00e9s \u00e1llat veszti \u00e9let\u00e9t a folyamat miatt (10-30 %). Ennek bizony\u00edt\u00e1s\u00e1ra vagy c\u00e1fol\u00e1s\u00e1ra a New Hampshire-i Egyetem kutat\u00f3i jelad\u00f3kat szereltek a felhaszn\u00e1lt \u00e1llatok p\u00e1nc\u00e9lj\u00e1ra, aminek c\u00e9lja az aktivit\u00e1suk k\u00f6vet\u00e9se volt. Az eredm\u00e9nyek azt mutatt\u00e1k, hogy a r\u00e1kok 82%-os ar\u00e1nyban t\u00fal\u00e9lt\u00e9k a megpr\u00f3b\u00e1ltat\u00e1st, de aktivit\u00e1suk cs\u00f6kkent. Ez a f\u00e1rad\u00e9kony, letargikus \u00e1llapot pedig megnehez\u00edtheti a k\u00f6vetkez\u0151 p\u00e1rz\u00e1si id\u0151szakot, hiszen a m\u00e9g l\u00e1badoz\u00f3 n\u0151st\u00e9nyek kevesebbet p\u00e1rosodnak, \u00e9s kevesebb pet\u00e9t raknak, ami a popul\u00e1ci\u00f3 cs\u00f6kken\u00e9s\u00e9t eredm\u00e9nyezi [12].<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"966\" height=\"643\" src=\"https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR9.png\" alt=\"\" class=\"wp-image-4832\" srcset=\"https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR9.png 966w, https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR9-300x200.png 300w, https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR9-768x511.png 768w, https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR9-150x100.png 150w, https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR9-450x300.png 450w\" sizes=\"(max-width: 966px) 100vw, 966px\" \/><figcaption class=\"wp-element-caption\">T\u0151rfark\u00faakat sz\u00edjaznak le, hogy kiv\u00e9reztess\u00e9k \u0151ket a Charles River Laborat\u00f3rium Charlestonban (S.C.) l\u00e9v\u0151 l\u00e9tes\u00edtm\u00e9ny\u00e9ben 2014 j\u00fanius\u00e1ban. \u2013 Fot\u00f3: Ariane M\u00fceller<\/figcaption><\/figure>\n\n\n\n<p>A Term\u00e9szetv\u00e9delmi Vil\u00e1gsz\u00f6vets\u00e9g (IUCN) a vesz\u00e9lyeztetett fajok list\u00e1j\u00e1ba sorolta az amerikai t\u0151rfark\u00fa r\u00e1kot (<em>Limulus polyphemus<\/em>) 2016-ban, 2018-ban pedig a jap\u00e1n t\u0151rfark\u00fa r\u00e1kot (<em>Tachypleus tridentatus<\/em>) is. A m\u00e1sik k\u00e9t fajra vonatkoz\u00f3 adatok tov\u00e1bbra sem meggy\u0151z\u0151ek. B\u00e1r az amerikai popul\u00e1ci\u00f3 nagys\u00e1g\u00e1val kapcsolatban tov\u00e1bbra sincs elegend\u0151 inform\u00e1ci\u00f3nk, a megl\u00e9v\u0151 adatok alapj\u00e1n m\u00e9gis meg\u00e1llap\u00edthatjuk, hogy a faj popul\u00e1ci\u00f3ja 90%-os cs\u00f6kken\u00e9st mutat az 1990-es \u00e9vekhez k\u00e9pest [1].<\/p>\n\n\n\n<p>Az emberek \u00e1ltal v\u00e9gzett gy\u0171jt\u00f6get\u00e9s, \u00e9s a ragadoz\u00f3k, p\u00e9ld\u00e1ul a c\u00e1p\u00e1k, sir\u00e1lyok, r\u00f3k\u00e1k \u00e9s a mos\u00f3medv\u00e9k v\u00e9lhet\u0151en hozz\u00e1j\u00e1rultak az amerikai t\u0151rfark\u00fa r\u00e1kok popul\u00e1ci\u00f3j\u00e1nak cs\u00f6kken\u00e9s\u00e9hez [4]. A pusztul\u00e1s egy\u00e9b forr\u00e1sai k\u00f6z\u00e9 tartozik az \u00e9l\u0151hely elveszt\u00e9se, a petecsemp\u00e9szet \u00e9s a hal\u00e1szh\u00e1l\u00f3kba val\u00f3 v\u00e9letlen befog\u00e1s [1]. A sz\u00f6vets\u00e9gi korm\u00e1ny vesz\u00e9lyeztetettnek nyilv\u00e1n\u00edtotta az egyik part ment\u00e9n vonul\u00f3 mad\u00e1rfajt, a sarki partfut\u00f3t (Calidris canutus rufa), amely k\u00f6zvetlen\u00fcl f\u00fcgg a r\u00e1kok pet\u00e9it\u0151l. Vonul\u00e1suk k\u00f6zben megszokott \u00e1llom\u00e1suk a t\u0151rfark\u00fa r\u00e1kok \u00edv\u00e1si helye, ahol energi\u00e1juk legnagyobb r\u00e9sz\u00e9t a frissen lerakott pet\u00e9kb\u0151l nyerik. Azonban az elm\u00falt 40 \u00e9vben a mad\u00e1rfaj popul\u00e1ci\u00f3j\u00e1nak mintegy 94%-a elt\u0171nt. Ennek egyik legf\u0151bb oka pedig a r\u00e1kok sz\u00e1m\u00e1nak cs\u00f6kken\u00e9se az Atlanti-\u00f3ce\u00e1n partvid\u00e9k\u00e9n [12]. A t\u0151rfark\u00faak egyedsz\u00e1m\u00e1nak cs\u00f6kken\u00e9se teh\u00e1t bel\u00e1thatatlan k\u00f6vetkezm\u00e9nyekhez vezet az \u00f6kosziszt\u00e9m\u00e1ban.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"574\" height=\"421\" src=\"https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR10.png\" alt=\"\" class=\"wp-image-4831\" srcset=\"https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR10.png 574w, https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR10-300x220.png 300w, https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR10-150x110.png 150w, https:\/\/terraplaza.com\/magazin\/wp-content\/uploads\/2023\/09\/TR10-450x330.png 450w\" sizes=\"(max-width: 574px) 100vw, 574px\" \/><figcaption class=\"wp-element-caption\">Egy sarki partfut\u00f3 csapkod a sz\u00e1rnyaival a parton Fortescue-ban, N.J. \u00e1llamban, 2007-ben. A vesz\u00e9lyeztetett fajk\u00e9nt nyilv\u00e1ntartott part menti madarak a t\u0151rfark\u00fa r\u00e1k pet\u00e9it\u0151l k\u00f6zvetlen\u00fcl f\u00fcggenek. &#8211; Fot\u00f3: Tim Shaffer\/Reuter<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><em>Irodalomjegyz\u00e9k:<\/em><\/h3>\n\n\n\n<p>[1] The editors of Encyclopedia Britannica, \u201eHorseshoe crab (chelicerate)\u201d, [Online]. El\u00e9rhet\u0151: https:\/\/www.britannica.com\/animal\/horseshoe-crab<br>[2] Florida Fish and Wildlife Conservation Commission, \u201eFacts about horsehsoe crab and FAQ\u201d, [Online]. El\u00e9rhet\u0151: https:\/\/myfwc.com\/research\/saltwater\/crustaceans\/horseshoe-crabs\/facts\/<br>[3] The National Wildlife Federation, \u201eHorseshoe crab\u201d, [Online]. El\u00e9rhet\u0151: https:\/\/www.nwf.org\/Educational-Resources\/Wildlife-Guide\/Invertebrates\/Horseshoe-Crab<br>[4] \u201eCoagulogen of Tachypleus tridentatus\u201d. [Online]. El\u00e9rhet\u0151: https:\/\/www.horseshoecrab.org\/info\/lifecycle.html<br>[5] \u201eKromog\u00e9n endotoxin vizsg\u00e1lati reagensek\u201d. [Online]. El\u00e9rhet\u0151: https:\/\/www.acciusa.com\/products-and-services\/bet-products\/lal-reagents\/<br>[6] Martin Exner, Sanjay Bhattacharya, B\u00e4rbel Christiansen, J\u00fcrgen Gebel, Peter Goroncy-Bermes, Philippe Hartemann, Peter Heeg, Carola Ilschner, Axel Kramer, Elaine Larson, Wolfgang Merkens, Martin Mielke, Peter Oltmanns, Birgit Ross, Manfred Rotter, Ricarda Maria Schmithausen, Hans-G\u00fcnther Sonntag and Matthias Trautmann, \u201eAntibiotic resistance: What is so special about multidrug-resistant Gram-negative bacteria?\u201d, [Online]. El\u00e9rhet\u0151: https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC5388835\/<br>[7] Gergely Lajos, <em>Orvosi mikrobiol\u00f3gia<\/em>, 2. \u00c1tdolgozott kiad\u00e1s. Budapest: Alliter Kiad\u00f3i \u00e9s Oktat\u00e1sfejleszt\u0151 Alap\u00edtv\u00e1ny, 2003.<br>[8] S. Harm, C. Schildb\u00f6ck, K. Strobl, \u00e9s J. Hartmann, \u201eAn in vitro study on factors affecting endotoxin neutralization in human plasma using the Limulus amebocyte lysate test\u201d, <em>Sci Rep<\/em>, k\u00f6t. 11, sz. 1, o. 4192, febr. 2021, doi: 10.1038\/s41598-021-83487-4.<br>[9] S. Razin \u00e9s S. Rottem, <em>Membrane lipids of prokaryotes<\/em>. in Current topics in membranes and transport, no. v. 17. New York: Academic Press, 1982.<br>[10] Sam Brasch, \u201eWhen Horseshoe Crabs Went to Fertilizer\u201d, [Online]. El\u00e9rhet\u0151: https:\/\/modernfarmer.com\/2014\/03\/horseshoe-crabs-went-fertilizer\/<br>[11] Dr. Moln\u00e1r Csaba, \u201eA k\u00e9k v\u00e9r \u00e1tka\u201d, [Online]. El\u00e9rhet\u0151: https:\/\/molnarcsaba.wordpress.com\/2017\/11\/06\/a-kek-ver-atka\/<br>[12] \u201eCoastal biomedical labs are bleeding more horseshoe crabs with little accountability\u201d, [Online]. El\u00e9rhet\u0151: https:\/\/www.npr.org\/2023\/06\/10\/1180761446\/coastal-biomedical-labs-are-bleeding-more-horseshoe-crabs-with-little-accountabi<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A t\u0151rfark\u00fa r\u00e1kokat joggal nevezhetj\u00fck \u00e9l\u0151 k\u00f6v\u00fcleteknek, ugyanis m\u00e1r 300 milli\u00f3 \u00e9ve szinte v\u00e1ltozatlan form\u00e1ban vannak jelen a F\u00f6ld\u00f6n. Ez azt jelenti, hogy m\u00e1r a dinoszauruszok el\u0151tt megjelent els\u0151, a maihoz hasonlatos alakjuk. Azonban ma m\u00e1r lassan a kihal\u00e1s sz\u00e9l\u00e9re sodr\u00f3dnak, ugyanis \u00e9l\u0151hely\u00fck cs\u00f6kken\u00e9se mellett az emberek is t\u00fal sok p\u00e9ld\u00e1nyt fognak be. Ez az\u00e9rt<\/p>\n","protected":false},"author":4,"featured_media":4842,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[36,144],"tags":[914,918,862,916,153,912],"class_list":{"0":"post-4830","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-izeltlabuak-hu","8":"category-melyviz-hu","9":"tag-csapragosok","10":"tag-elo-kovulet","11":"tag-izeltlabuak","12":"tag-melytenger","13":"tag-melyviz-hu","14":"tag-torfarku-rak"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>A misztikus m\u00e9lytenger vil\u00e1ga: a t\u0151rfark\u00fa r\u00e1k\u00a0 &#8211; TerraPlaza magazin<\/title>\n<meta name=\"description\" content=\"A t\u0151rfark\u00fa r\u00e1kokat joggal nevezhetj\u00fck \u0151si k\u00f6v\u00fcleteknek, ugyanis m\u00e1r 300 milli\u00f3 \u00e9ve szinte v\u00e1ltozatlan form\u00e1ban vannak jelen a f\u00f6ld\u00f6n.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/terraplaza.com\/magazin\/hu\/izeltlabuak-hu\/a-misztikus-melytenger-vilaga-a-torfarku-rak\/4830\/\" \/>\n<meta property=\"og:locale\" content=\"hu_HU\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"A misztikus m\u00e9lytenger vil\u00e1ga: a t\u0151rfark\u00fa r\u00e1k\u00a0 &#8211; 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