Lolu hlobo ongaqondakali futhi ezihlukahlukene - Shellfish

Yini esiyaziyo ngala madoda - ngezilwane vtorichnopolostnyh ezilwane ezingenamgogodla, okuyinto ehlangana uhlobo shellfish? Lokho banayo ethambile, lesi sidlo esingenamathambo esehla umzimba, abanye babe amagobolondo calcareous (njenge iminenke), kanti ezinye ingekho (njengaku slugs). Ezinye zazo phila impilo enokuthula, ukudla utshani, futhi ezinye - ngisho nalabo abanukubeza izingane eziyingozi kanye nezinambuzane. Othile kancane kakhulu (isib, umnenke inyonyoba esingaphezudlwana kwehora amasentimitha 12-20 nje), kuyilapho squid usebenzisa "jet injini", ungakwazi ukufinyelela isivinini 70 km / h. Kukhona izinhlobo ngokukhethekile ezifuywa udliwe (izimbaza, ama-oyster) noma amapharele, sepia, purpura. Futhi kukhona shellfish enobuthi kakhulu ukuthi angabangela ukufa eziyishumi nje kubo amadoda.

Phakathi lokhu mkhaya variegated kakhulu kukhona amazimu, ngisho eyayisekhanda lami. kanjani isayensi libabiza lolu hlobo? Mollusk zihlukaniswe amaqembu amathathu: bivalves, gastropods futhi cephalopods. Kodwa ngaphambi ukhuluma ngani umehluko phakathi umnenke, oyster futhi squid, ake ukuhlukanisa yini esihlanganisa lezi kwesama, yokuphila kanye ezingeni intelligence kwezilwane. Zonke abanakho skeleton yangaphakathi. Amagobolondo kwezinye izilwane "ekhaya" yabo, overheat Ukuvikelwa nasezilwaneni eziyingozi. umzimba wabo siqukethe esifubeni, imilenze ikhanda. Ezinhlotsheni eziningi zezinto eziphilayo, kukhona "isembatho" - isikhumba nesibaya ukuthi ihlanganisa inhliziyo, isibindi, izinso. Igazi banayo aphuzi, kodwa ezinye cephalopods - ngokubomvu.

Shellfish uhlobo kwakuvamile kakhulu esikhathini Jurassic, lapho iningi surface eMhlabeni laligcwele amanzi. Kunezinhlobo ezingaphezu kuka-130 eziyinkulungwane hlobo of dalwa! Ezimbiwa phansi - cishe amaningi njengoba manje kunezigidi izinhlobo etholakalayo. Futhi phakathi kwabo kukhona nalabo babebhekwa njengezinhlanya yokuqothulwa, kodwa ababambanga uyaphila futhi alimale ekujuleni kwamanzi. Yilokhu okwenzeka "ezimbiwa phansi" neopilina ukuthi ubanjwe 1952 elwandle eliKhulu iPacific. Ngakho-ke ngeke sikwazi ngokuqiniseka onjani wanyamalala - ulwazi mayelana yokuqothulwa abakulo kungabonakala ihaba. Kukholakala ukuthi ngesikhathi Jura clams ayemakhulu kakhulu, futhi lokhu kuqinisekiswa imivubukulo. Umhlangano omkhulu kunayo yonke, atholakala eningizimu-US, cephalopod ndlovu -. Imitha-Three squid zasolwandle iminyaka eyizigidi ezingu-325 edlule. Nokho, ngo-2003 ngasogwini Antarctica wabanjwa squid ngamamitha amabili nesigamu ubude.

Class Gastropods uhlukile nabameleli bayo kahle ezweni, ngoba ngobuningi. Ngokungafani bivalves futhi cephalopods, azikho imidondoshiya. Ezinye izinhlobo zawo ezishisayo ongafinyelela ngamasentimitha angu-60, kodwa iningi - yizilwane ezincane made 8-12 cm. Ibizwa ngokuthi ngakho ngenxa "imilenze", okuyinto empeleni - hhayi esinye sezitho zomzimba wakho futhi isiqu uqobo. Ezinye gastropods abe zigezwa khona, futhi abanye - "enqunu". Awasheshi kakhulu, ukunciphisa imisipha esifubeni kanye nasemilenzeni; Zidla khona ikakhulu ukudla isitshalo. Ngo iminenke eliwumhlaba ezansi ikhanda has a umlomo, futhi phezulu - tentacles ebucayi, amathiphu zazo ibekwe "amehlo". Izibilini bangaphansi nesiphuku.

Yini enye engingabuye iqembu ezithakazelisayo yezidalwa ezifana uhlobo shellfish? Ezinye zazo (bivalves), ukuphila kuphela imizimba amanzi. Isilwane elikhulu lesi sigaba tridacna: ezinye zezinhlobo enesisindo 300 kg. Isici nobuntu lolu hlobo bunemisipha sinamandla kakhulu, yasibamba igobolondo valve. Igugu enkulu ekhishwe kusuka kumasistimu asebenzayo, enesisindo 6 kg. Kuyathakazelisa yokuthi Sea Rapan hit oLwandle Olumnyama kuphela-iminyaka engu-30 ngekhulu leminyaka lamashumi amabili, kanye ukufika umkhumbi Pacific. Bukhali isivakashi oyisiminzi eminyakeni engaphansi kwengu-100 ukunciphisa labantu izimbaza zendawo oyster, wabakhwelisa engcupheni yokuqothulwa.

Kukholakala ukuthi ayikho gastropods noma bivalves abanalo biko. Nokho, i-imbaza, njengabo-octopus, kubangela nenhlonipho okungalindelekile. Ummeleli we-cephalopods kahle amenable nokuqeqeshwa, ukwazi abantu abasebenzisa ukondla, ukuhlukanisa shades of imibala mass, edlulisa ulwazi kusuka komunye umuntu uya komunye futhi ebuchosheni, esivikela "protocherep" - igobolondo okhethekile cartilaginous. Kucatshangwa ngakho konke lokhu ingwane omkhulu unganciphisa ku igebe nge ukushuba uhlamvu! Lezi molluscs bangakha amakhaya: kusuka amathini noma amagobolondo efile babuthela ukwakhiwa ngisho ne bavulela!