Sharks a cikin Black Sea: Gaskiya ko Tarihin?

Wasu mutane, musamman ma bayan da sa mamaki rahotanni na shark kai hare-hare a cikin mura na Misira, tambaya: amma shi ne shi hadari ga swimmers da kuma iri iri ruwan tekun Black Sea? Ko samu ko da sharks a cikin Black Sea, da kuma ko za ka iya saduwa da su a kan iyakar Caucasus da kuma Crimea?

Don cikakken amsa wannan tambaya da kuma sake tabbata dukan damuwa, ku kawai bukatar yin yawon shakatawa, albeit a takaice, tarihin abin da ya faru na ruwa yanki, wanda a yanzu ake kira da tekun Black Sea. Miliyan 10. Shekaru da suka wuce akwai wata babbar kandami, wanda masana kimiyya sun mai suna Sarmatskys teku. A hankali Sarmatian Sea tare da karuwa daga duwãtsu aka raba da dama manyan tabkuna, tekuna, yanke daga ruwan teku: da Aral, Caspian da kuma Black. Wannan na karshe, saboda da babbar dama ƙõramu sunã gudãna a cikin shi, shi da aka desalinated. A tsawon lokaci, duk da fauna da cewa na zaune a cikin zamanin d Black Sea, da lake ya zama sabo ruwa. Amma miliyan 8. Shekaru da suka wuce akwai wata babbar girgizar ƙasa dakarun cewa halitta Tekun Marmara da kuma Bosporus da Dardanelles da kuma tabbatar da m zuwa sa'an nan mazaunan Black Sea. Taro na gishiri da ruwa flooded daga Rum zuwa tekun Black Sea. A canje-canje su ne don haka m cewa ruwa tare marine mazaunan Black Sea ba da lokaci zuwa daidaita zuwa gare su. A babbar yawan gawawwakin sunk zuwa kasa, da kuma aiwatar da bazuwar daga cikin Black Sea sanya kwarai, ba kama da sauran teku: samo asali hydrosulfide Layer, located 150 mita kasa da ruwa surface.

Wannan hydrogen sulfide Layer ya aikata a cikinsa shimfiɗã ta na da tekun Black Sea. Kasa 150 m iya zama ba, fãce sulfuric anaerobic kwayoyin da cewa ta rayuwa aiki kawai kara yawan hydrogen sulfide. Wannan shã'aninku - wani bakin ciki Layer cewa shi ne mai arziki a cikin kifi, sosai tightens rayuwar irin manyan da kuma kawo hadari da yara, kamar kifayen teku a tekun Black Sea. Amma hydrogen sulfide - ba kawai factor cewa tubalan da hanyar da kifayen teku. A manyan yawan kõguna da kunkuntar Bosporus markedly desalinate ruwa na teku. Isar da shi a ce cewa, gwargwado na Black Sea rabin abin da na Rum. Bayan haka, ta tabbata a cikin hunturu ruwa za a iya sanyaya zuwa + 9 P cewa samu a sanyi, amma ba sanyi ruwan Atlantic sharks ne sosai m. M ga sharks da kuma scanty abinci tushe na Black Sea: manyan yara fi son manyan da Stein ganima da cewa na zaune a cikin zurfin ruwa, yayin da Black Sea ne mai arziki a cikin kananan kifi: irin kifi, sprat, sardines, wanda rayuwa a cikin farfajiya yadudduka na ruwa.

Idan muka ɗauka cewa wani shark da zaplyvet bazara daga Rum zuwa Black Sea, abu ne mai wuya cewa shi ba zai samu daga Bosphorus saboda unsuitability na ruwa da kuma scarcity abinci. Duk da haka sharks a cikin Black Sea ne, kuma ko da gwargwadon iri biyu. Amma ba a tsorata sosai! Wannan spiny dogfish shark, kuma aka sani da kare shark saboda kama da muzzle, kuma cat sharks. Wadannan nau'o'i guda biyu na abinci, kazalika da tekun Black Sea dabbobin ruwa, da ƙananan kifaye, da motsi a cikin kananan dabbobi. Ba su ci mutane, ko da yake bãkunansu kuma, kamar dabbobin ruwa, suna cike da hakora. Amma mutane suna son ci wadannan kananan sharks: steaks katrana dauke da wani babban delicacy a cikin Crimea, kuma daga sturgeon katrana mai daraja a cikin wannan hanya a matsayin sturgeon sturgeon kamar yadda wannan kifi yana da kusan babu kasũsuwa, ashe, da kuma da nama yana da kyau kwarai da dandano.

Duk da haka, a fili kãfirta shark hadari a tekun Black Sea ne har yanzu ba shi daraja: a katrana a kan filafilin kifi yana da kaifi karu, wanda ya haddasa zafi da zai iya sa kumburi da raunuka. Ko da yake ba peculiar zuwa katranov da cat sharks wani lokacin iyo a cikin kududdufi ruwa, kuma za su iya kawai zo. A wannan yanayin da kifi iya tsoro taso kan ruwa da kuma hakora. Amma wannan yanayin da aka rubuta kawai sau daya a duk shekaru da na lura (a cikin 1970s a kan rairayin bakin teku Yevpatoria). A mafi hatsari dabba ga mutane a cikin Black Sea - yana da ba a shark da stingrays, stingray. Bayayyakinsu suna sanye take da zangarniya ba sauki, kuma m. Rabo daga allura dafin ba mutuwa da mutane, amma za a iya tsanani washe hutu, kamar yadda reshe ta kumbura daga cizo. Akwai lokuta da mutuwar (ko da yake ba a cikin Black Sea) daga bugawa da karu a muhimmanci gabobin. Amma, in general, Black Sea ne dauke da safest a kwatanta da sauransu.