Theodoxus katantanwa: abun ciki, haifuwa, bayanin, hoto

Babban fasali na nau'in

Halin nasa ne na dangin Neretid. Kamar yawancin dangi, za su iya rayuwa a cikin ruwa mai laushi da maras kyau. Girman su ya kai matsakaicin tsayin santimita. Harsashi yana zagaye, tare da ɗan murƙushewa; ga mutane da yawa, yana kama da kwano ko ƙoƙo a siffa. A bayan tafin tafin kafa akwai hula, wanda dabbar ta rufe ƙofar kamar yadda ake bukata, kamar ampoules. tafin tafin hannu haske ne, murfi da ƙofar shiga suna rawaya.

Launi na mollusks yana da bambanci da kyau. Tsarin harsashi yana da bambanci - babba da ƙananan ɗigo ko zigzags masu tsaka-tsaki a kan haske ko duhu. Harsashi da kansu masu kauri ne masu kauri kuma masu yawa, masu ɗorewa. Gaskiyar ita ce, a cikin yanayi, mollusks suna rayuwa a cikin tafki tare da ƙarfin halin yanzu, kuma harsashi mai ƙarfi ya zama dole kawai a cikin waɗannan yanayi.

Iri:

• Theodoxus danubialis (theodoxus danubialis) - kyawawan mollusks tare da harsashi na lemun tsami-fari mai launi tare da nau'i mai ban sha'awa na zigzags duhu na kauri daban-daban. Suna iya girma har zuwa santimita daya da rabi. Suna son ruwa mai wuya.
• Theodoxus fluviatilis (theodoxus fluviatilis) - an rarraba nau'in a kan babban yanki, amma a lokaci guda an dauke shi da wuya. Rarraba a Turai, Rasha, Scandinavian kasashen. Harsashi suna da duhu a launi - launin ruwan kasa, ja, shunayya, tare da bayyanannun fararen ɗigon ruwa. Suna da al'ada mai ban sha'awa: kafin cin algae, suna niƙa su a kan duwatsu. Saboda haka, ƙasa an fi son m.
• Theodoxus transversalis (theodoxus transversalis) - maimakon ƙananan katantanwa, bawo ba tare da tsari ba, launuka daga launin toka zuwa rawaya ko launin ruwan kasa-rawaya.
• Theodoxus euxinus (theodoxus euxinus) - molluscs tare da harsashi na launi mai haske mai daɗi, tare da kyakkyawan tsari na layin da aka karye da specks. Suna zaune a cikin yankuna masu dumi - Romania, Girka, Ukraine.
• Theodoxus pallasi (theodoxus pallasi) - yana zaune a cikin ruwa mai laushi da gishiri. Yanayin yanayi - Azov, Aral, Black Sea, koguna na cikin kwalayen su. Kasa da centimita a girman, launukan ɗimbin duhu ne da zigzags akan bangon launin toka-rawaya.
• Theodoxus astrachanicus (theodoxus astrachanicus) - yana zaune a cikin Dniester, kogunan Tekun Azov. Wadannan gastropods suna da kyakkyawan tsari mai haske da haske: zigzags masu duhu akai-akai akan bango mai launin rawaya.

Wanene theodoxus

Waɗannan ƙananan ƙananan katantanwa ne waɗanda ke zaune a cikin ruwan Rasha, Ukraine, Belarus, Poland, Hungary. Ana kuma samun su a cikin ƙasashen Baltic da Scandinavia.

A gaskiya ma, ana iya kiran su kawai da ruwa mai tsabta, tun da wasu nau'in jinsin Theodoxus suna zaune a cikin Tekun Azov, Black da Baltic Seas. A ka'ida, daruruwan dubban shekaru da suka wuce, duk wadannan gastropods sun rayu a cikin ruwan teku mai gishiri, sa'an nan kuma wasu nau'o'in suna motsawa zuwa koguna da tafkuna.

Babu wani abu mai ban mamaki a kallon farko. Duk da haka, bai kamata mutum ya ji kunya ba kafin lokaci, waɗannan wakilan gida na rukuni na gastropods suna da nau'i-nau'i iri-iri na harsashi, halaye masu ban sha'awa, da halayen halayen haifuwa. A ƙarshe, suna da kyau kawai!

An yi nasarar kwatanta waɗannan katantanwa na dogon lokaci, kuma an sami kuma babu jayayya game da matsayinsu a cikin ilimin kimiyya: class Gastropoda (Gastropoda), iyali Neritidae (Neretids), jinsin Theodoxus (Theodoxus).

A matsayinka na mai mulki, waɗannan neretids suna rayuwa a kan duwatsu masu wuya, wanda ke hade da yanayin abincin su. Suna kawar da mafi ƙanƙanta algae da detritus (ragowar kwayoyin halitta da suka lalace) daga saman da aka rufe da ruwa.

Katantanwa sun fi yin kyau a cikin ruwa mai wuya. Kuma wannan ba abin mamaki ba ne, tun da suna buƙatar yawancin calcium don gina harsashi.

Wataƙila mutane da yawa sun haɗu da waɗannan mollusks a cikin koguna da tafkunansu na asali, amma mutane kaɗan suna tunanin cewa za a iya samun nasarar ajiye su a cikin ƙaramin akwatin kifaye don amfanin dalilin. Matsakaicin rayuwar neretids shine kusan shekaru 3.

Content

Kula da waɗannan katantanwa masu ban mamaki ba shi da wahala ko kaɗan. Suna jin dadi daidai da yanayin zafi na +19 da +29. Suna ciyar da algae, kuma suna aiki da hankali - waɗannan su ne masu taimakawa masu kyau, godiya ga wanda ya fi sauƙi ga mai shi don kiyaye akwatin kifaye mai tsabta. Gaskiya ne, ƙazantaccen algae, kamar "black gemu", yana da wuya a gare su. Katantanwa suna barin tsire-tsire masu tsayi a cikakke - wannan kuma shine babban ƙari. A matsayinka na mai mulki, akwatin kifaye wanda waɗannan gastropods ke rayuwa koyaushe yana da kyau, kuma ciyayi a cikinta suna da tsabta da lafiya.

Yawancin nau'ikan mollusks sun fi son ruwa mai ƙarfi, mai wadatar alli - suna buƙatar shi don harsashi mai ƙarfi. Kuna iya sanya duwatsun teku (limestone) a cikinsu a cikin akwatin kifaye (la'akari, ba shakka, bukatun sauran mazaunan akwatin kifaye). Haka kuma ba su son tsayayyen ruwa.

Katantanwa sun ƙunshi ƙasa da 6-8 lokaci guda. Har yanzu suna kanana sosai, don haka a cikin ƙananan lambobi kawai ba za ku lura da su a cikin akwatin kifaye ba. Bugu da ƙari, irin wannan adadin ya zama dole don haifuwa. Gaskiyar ita ce, waɗannan mollusks duka biyu ne na maza da mata, kuma a lokaci guda maza ba su bambanta da mace ba.

Wani fasali mai ban sha'awa na halayen waɗannan kyawawan mazaunan akwatin kifaye shine cewa kowannensu yana da nasa wuri a cikin "iyali". Wannan shine wurin da dabbar dabba ke hutawa da yankin uXNUMXbuXNUMXbthe yankin da yake "tsara". A matsayinka na mai mulki, wannan wuri ne mai wuyar gaske - sun fi son shi zuwa ga ganye da mai tushe na shuke-shuke. Yakan faru sau da yawa cewa karamin theodoxus ya zauna a kan harsashi na mollusks mafi girma. Katantanwa a hankali da tsari suna share wuraren da suke lalata, kuma ƙarancin abinci ne kawai zai iya tilasta musu barin iyakar wannan wuri.