Barnacles. Impilo umjikelezo, ukukhiqizwa kabusha

Marine isithelo barnacles - uhlobo zomdlavuza barnacles (suborder barnacles). I abadala kwalesi silwane Uyi ukuphila esinqunyiwe, axube ngokwabo ezindaweni okunzima. Izindawo kungenzeka kuphela esigabeni elalikudle lapho liseyisibungu. Okwamanje, kule uhlobo lwe kuhlanganisa zilwane ezingu-60.

Lezi zilwane zasolwandle (isithombe ngezansi) kufanele amagobolondo calcareous, ehambisana substrate. Ukucwila yakhiwe amapuleti 6, ezine zazo yakha cap futhi unekhono ukuhambisa ngaphandle. Crustacean amanga ezansi endlini, ababambelela nemilenze phakathi amapuleti evulekile. Ngakho-ke yenza eyingqabavu kushaywa komqondo, ukuze ukushayela amanzi endlini izinhlayiyana zokudla.

I barnacle ubukhulu ifinyelela amasentimitha eziyisikhombisa futhi ubude - 13. Umbala ngokuvamile olumhlophe noma lemicu empunga elinamathela othini ne emapheshana longitudinal purple noma ensundu.

Barnacle ematheni zawo ezibanzi unamathisele kunoma iyiphi indawo - igobolondo Conch, amatshe, izimpande zemithi yinqwaba zinsika, ezinzulwini lwemikhumbi, kanye ezihlukahlukene izilwane. Ngezansi ungabona izithombe izilwane zasemanzini, okungase unamathisele isithelo. I ingcina, okuyinto kuveza barnacles, ezinzile kakhulu. Imelana okushisa afinyelela ku-degree angu-200 futhi bangaveziwe alkalis, acid nezinye yokususa ingcekeza elenkani.

Ngakwelinye ihlangothi, ezinkulu amaphiko barnacles zixazulula isipanji elithambile, okuyiwona endlini crustacean uyisisekelo futhi okuthembekile okuqinile.

Ukuguquguquka kwempilo ulwandle isithelo

Kutfutfukiswa ulwandle isithelo icuketse letigaba ezilandelayo: amaqanda, isibungu, isikhuphashe omdala. Lezi ziphungumangathi zasondela eliphuma amaqanda ukuntanta ngokukhululekile futhi izigaba ezimbili: nauplius futhi Zypries. Ngo abandayo zama-esiteji elalikudle lapho liseyisibungu Uthatha 2 amaviki ngaphambi lokuqala lwenyanga, ngesikhathi tropical - 3-5 izinsuku.

Izibungu esiteji Zypries angadli. Okwesikhathi esithile ziyabuya, kodwa, kanye izimo ezikahle anamekwe substrate. izinkalankala Adult Uyi ukuphila isilungisiwe.

Barnacles ezikhulayo nokuthuthukisa ngejubane angabacwasi ngokushesha. Ezindaweni ezishisa kakhulu, izinhlobo ezithile kakade amasonto 1-2 emva sokuxazulula ukufinyelela ukuvuthwa. Ngo ukubanda Baltic Sea, kuthatha cishe izinyanga ezintathu. Isikhathi sokuphila krill isukela eminyakeni 1-2 ukuze 5-7 noma ngaphezulu.

Njengoba liphindaphindeke barnacle

Phakathi kwabantu ihlezi eceleni, cross-kokukhulelwa wenziwa. Barnacle kuyinto hermaphrodite, okungukuthi, ngamunye has kokubili gonads owesilisa nowesifazane. Eduze phansi phambi pair of imilenze oviducts zivulwa, kusukela lapho amaqanda zitholakala ke ukuwela umgodi we nesiphuku. Vas efferens iyangena ijabulise besilisa copulatory sitho, lapho abhanqiwe waqonda, amehlo aphumele ngaphandle kwangaphandle futhi phakathi komgodi isiphuku ngaphambili ngabanye. Banikeze isidoda ivundisa iqanda. Izifundo sezenziwe, phakathi kwesikhathi lapho kwaba sobala ukuthi isithelo Ulwandle nokuzala wedwa. Emva kokukhulelwa, amaqembu iqanda isiphuku ingaphakathi ipuleti sihlanganise oviparous bese uqale kwasani.

Cold eyakheke amaqanda ngabanye ehlobo, zalisa nabo ubusika kuya entwasahlobo izibungu aphume. abantu Heat abathanda unyaka wonke amaqanda izikhathi eziningana.