Barnacles. A rayuwa ta sake zagayowar, haifuwa

Marine ɗan itacen oak barnacles - wani irin cancers barnacles (suborder barnacles). A manya na wannan jinsin su ne wani ajali rayuwa, attaching da su, don da wuya saman. Sake ma su matsugunni mai yiwuwa ne kawai a larval mataki. A halin yanzu, wannan HALITTAR hada da 60 jinsin.

Wadannan marine dabbobi (photo kasa) da calcareous bawo, wanda aka haɗe zuwa substrate. Nutse kanta kunshi faranti 6, hudu daga wanda ya samar da wani hula da kuma suna da ikon motsa baya. Crustacean ya ta'allaka ne a kasa daga cikin gidan, mai danko wata gabar jiki tsakanin bude faranti. Kamar haka shi ya sa ƙwazo rhythmic duka na, domin su fitar da ruwan ciki da gidan da abinci barbashi.

A diamita barnacle kai bakwai santimita da kuma tsawon - 13. canza launi ne yawanci whitish ko grayish tare tsaye tube na shunayya, ko ruwan kasa.

Barnacle ta m soles a haɗe da duk wani surface - wani conch harsashi, kankara, itace tushen, tara na Piers, da bottoms jiragen ruwa, kazalika da wani iri-iri na dabbobi. A ƙasa zaka iya ganin hotuna da marine dabbobi, wanda zai iya hašawa da wani ɗan itacen oak. The m, wanda aka samar barnacles, sosai a barga. Yana withstands yanayin zafi har zuwa 200 darajõji, kuma ba fallasa zuwa alkalis, acid da wasu kaushi.

Bi da bi, manyan fikafikai barnacles sau da yawa shirya taushi soso, ga abin da crustacean gidan ne abin dogara da kuma m tushe.

A rayuwa ta sake zagayowar daga teku ɗan itacen oak

Development of teku ɗan itacen oak kunshi wadannan matakai: kwai, tsutsa, adult crayfish. The larvae kunno kai daga qwai taso kan ruwa da yardar kaina da kuma masu matakai biyu: nauplius da Zypries. A sanyi-ruwa jinsunan larval mataki yana daga 2 makonni kafin na farko na watan, yayin da wurare masu zafi - game 3-5 days.

Larvae mataki Zypries ci ba. Ga wasu lokaci da suka taso kan ruwa, amma, sau daya a cikin sharadi gwargwado suna haɗe zuwa substrate. Adult crabs ne tsayayyen rayuwa.

Barnacles girma da kuma tasowa a fairly m taki. A yammacin sahara, wasu jinsin su ne riga 1-2 makonni bayan ya magance kai ga ƙarfinsa. A colder Baltic Sea, yana daukan game da watanni uku. A rayuwa span na krill ne daga 1-2 ga 5-7 shekaru ko fiye.

Kamar yadda na ninka barnacle

Tsakanin mutane a zaune kusa da, giciye-hadi ne da za'ayi. Barnacle ne hermaphrodite, wato, kowane yana da biyu namiji da mace gonads. Kusa da kasa na gaba biyu daga kafafunsa oviducts aka buɗe, daga abin da qwai suna located, sa'an nan fada cikin rami na alkyabba. Vas efferens daga ƙarƙashinsu a cikin tubular namiji copulatory sashin jiki, wanda a lokacin da su guda biyu mike, protruding m, kuma a cikin alkyabbar rami na gaba da mutum. Samar musu da maniyyi fertilizes da kwai. Nazarin da aka gudanar, a lokacin da shi ya bayyana cewa teku ɗan itacen oak iya haifa kadai. Bayan hadi, kwai kungiyoyin a alkyabbar rami farantin hada oviparous da kuma fara crushing.

Cold-kafa mutum qwai a lokacin rani, sa taki su a cikin hunturu ga spring da larvae fita. Heat-auna mutane a ko'ina cikin shekara sa qwai sau da yawa.