Wannan m da bambance bambancen irin - Shellfish

Abin da muka sani game da su - game vtorichnopolostnyh invertebrate dabbobi, wanda ake hada a wani irin Shellfish? Wannan suna da taushi, boneless jiki, wasu suna da calcareous bawo (kamar dodon kodi), da kuma wasu da shi ba ya wanzu (as a slugs). Wasu daga cikin su kai wani m rayuwa, cin ciyawa, da kuma wasu - ko da hatsari da yara da kuma parasites. Wani sosai m (misali, katantanwa jan gindi fiye da awa daya kawai 12-20 santimita), yayin da squid yin amfani da wani "jet engine", za a iya isa gudu daga 70 km / h. Akwai jinsunan da aka musamman bred da za a ci abinci (mussels, oysters) ko ga lu'ulu'u, sepia, purpura. Kuma akwai wani sosai m Shellfish cewa zai iya sa mutuwa kawai goma daga cikinsu maza.

Daga cikin wannan musamman da bambance-bambance kadan iyali akwai kuma cannibals, kuma ko da Vampires. Yaya kimiyya classifies da irin wannan? Mollusks kasu kashi uku kungiyoyin: bivalves, gastropods da cephalopods. Amma kafin magana game da bambance-bambance tsakanin katantanwa, oysters da squid, bari ware abin da haɗa kan bangaskiya wadannan daban-daban a cikin bayyanar, salon da kuma matakin da m dabbobi. Duk da ba su ciki kwarangwal. Bawo na wasu dabbobi ne su "gida", overheat kariya da kuma yara. Jikinsu kunshi wani jiki da kafafunsa da kansa. A mafi jinsin, akwai wani "alkyabbar" - fata Musulunci da yake rufe da zuciya, hanta, koda. Jini suna da yellowish, amma wasu cephalopods - m.

Shellfish irin aka sosai na kowa a cikin Jurassic lokaci, a lokacin da mafiya yawa daga cikin Duniya ta surface an rufe ta da ruwa. Akwai fiye da 130.000 jinsunan burbushin halittun - kusan kamar yadda da yawa kamar yadda a can ake yanzu data kasance jinsunan. Kuma daga cikinsu akwai waɗanda aka dauke su dadaddun, amma da suka kama da rai da abinsa lafiya daga zurfin ruwa. Wannan shi ne abin da ya faru tare da "m" neopilina cewa kama a shekara ta 1952 a cikin tekun Pacific. Saboda haka ba za mu iya ce yaƙĩni abin da irin bace - bayanai game da nau'i nau'i za a iya yi karin gishiri. An yi imani da cewa a lokacin da Jura clams sun babbar, kuma wannan ya tabbatar da archaeological Finds. The most, samu a kudancin {asar Amirka, cephalopod misali -. Three-mita squid zauna cikin tẽku miliyan 325 da suka wuce. Duk da haka, a shekarar 2003 kashe bakin tekun na Antarctica da aka kama squid a biyu da rabi mita dogon.

Class Gastropods ne musamman a cewa, da wakilan sun ƙware cikin ƙasar, kuma domin shi ne mafi m. Ba kamar bivalves da cephalopods, akwai wani Refayawa. Wasu wurare masu zafi jinsunan iya isa har zuwa 60 cm, amma masu rinjaye - ne kananan dabbobi ne 8-12 cm tsawo. Shi ne ake kira don haka saboda "kafafunsa", wanda a gaskiya - ba wani reshe da akwati kanta. Wasu daga gastropods da kwatami, da kuma wasu - "tsirara". Su matsawa sosai a hankali, Munã rage tsoka jiki da kafafu. Suna ciyar da abinci, yafi a kan shuka abinci. A nazarin sasannin dodon kodi a kasa na shugaban yana da wani bakin, kuma a saman - m tentacles, da tukwici na wanda an sanya "idanu". A ciki gabobin ne a karkashin alkyabbar.

Me kuma yake ban sha'awa rukuni na mutane kamar da irin Shellfish? Wasu daga cikin su (bivalves), rayuwa ne kawai a ruwa a jikinsu. The most dabba daga wannan aji ne tridacna: wasu samfurori yin la'akari 300 kg. A halayyar alama na irin wannan ne musamman karfi tsokoki, fastening harsashi bawuloli. Babban dutse mai daraja cirewa daga harsashi, yin la'akari 6 kg. Yana da ban sha'awa da cewa Black Sea Rapan buga Black Sea ne kawai 30-shekara na karni na ashirin, tare da isowa daga cikin jirgin Pacific. M gluttonous baki a kasa da shekaru 100 don rage yawan na gida mussels da oysters, ya sa su a kan gãɓar rãmi na nau'i nau'i.

An yi imani da cewa babu wani daga gastropods ko bivalves bã su hankalta. Duk da haka, irin wannan kilam, kamar wani dorinar ruwa, Yanã involuntary girmamawa. Wakilin cephalopods daidai amenable zuwa horo, san mutanen da suka ciyar, rarrabe tabarau na launuka taro, watsa bayanai daga mutum daya zuwa wani da yake cikin kwakwalwa, abin da na tsare "protocherep" - musamman cartilaginous harsashi. Tare da duk wannan babbar dorinar ruwa iya matsi a cikin rata tare da kauri da tsabar kudin! Wadannan molluscs iya gina gidajensu: daga gwangwani ko matattu bawo da suka tattara, da yi ko da tare da bude kofa!