'Yan uwan majiyoyin katsewa da katantanwa wadanda suke rayuwa a cikin ruwan teku, waye muke magana? Tabbas, game da nudibranchs. Wannan shine abin da suke kira keɓaɓɓiyar rukuni na gastropods da ke rayuwa cikin teku.
A yau wannan rukunin yana da kusan ɗabi'a dubu, waɗanda za mu gaya muku a wannan labarin. Mene ne na musamman game da waɗannan dabbobi? Ta yaya suka banbanta da sauran 'yan uwansu nau'ikan (mollusks)?
Da farko dai, bayyanar asali. Kawai kalli waɗannan kyakkyawa na cikin ruwa, daidai ne a gare su don tsara ainihin "gasar kyakkyawa ta ruwan teku", saboda duk suna da kyau don zaɓin, suna da kyau - ɗayan ya fi na ɗaya! Abin da siffofin, abin da launuka!
Amma tsarin jikin mutum, basu banbanta da sauran nau'ikan gastropods: duk iri daya ne "kafa", wacce take aiki a matsayin kayan motsa jiki, duk tsinkayen guda daya ne akan jikin da kananan idanu.
Af, waɗannan ƙananan fashewar (rhinophores) suna wakiltar “tsari” na musamman wanda ke taimakawa mollusk ba kawai ƙanshi ba, har ma don kama ɗanɗano.
Masana kimiyya sun kira wannan kayan sunadarai. Tare da irin wannan ƙayyadaddun inganci, mollusk na nudibranch na iya samun abinci cikin sauƙi, motsawa har ma da ɓoyewa daga abokan gaba.
Dangane da tsarin kwayoyin halitta na ciki, an rarraba nudibranchs zuwa manyan sassan biyu: eolides da doridids. Kasancewar gills da kuma tsarin hanta yana rarrabe wakilan bangarori biyu: doridids yana gabatar da gills na gaske kuma hanta tana nan a cikin jikin mutum kuma dukkan sassan jikin mutum ne, wanda ba za'a iya fada game da eolides (ba su da kwayoyi, kuma hanta yana da rabuwa).
Abin da ya hada dukkan nudibranchs? Na farko shine bambancin yanayin jikin: yana iya bambanta daga zagaye zuwa tsutsa-tsutsa mai-girma.
Alamar ta biyu ita ce farfajiyar gefen kwandon: huhun bakin ciki na iya kasancewa da laushi, sannan kuma suna da huhun ciki, huɗa, maɓuɓɓuga, har ma da fitowar iska.
Da kyau, na uku, alama mafi ban sha'awa wanda ke haɗe duk nudibranchs shine palette mai ban mamaki da launuka da tabarau! Wadannan dabbobi za a iya fentin su a shuɗi, cyan, rawaya, ja, violet, kore ... duk launuka ba za a iya ƙidaya su ba!
Amma shin kun san cewa launi iri-iri na huffranch mollusk na iya canzawa kuma ya dogara da wane irin abinci ne da ta ɗanɗana kafin waɗannan? Wannan hakika ya tabbata - masana kimiyya sun tabbatar!
Dangane da tsarin jikin mutum kuwa, tsirararanchs sun banbanta kansu anan: nau'ikan gabbai, tabo, rariyoyi da tatsuniyoyi suna sanya wadannan halittu da basu da kyau. Kuna iya tabbatar da wannan ta hanyar kallon hoto na kowane wakilin nudibranch mollusks.
Haɗin wannan rukuni na mollusks da salon: dukansu basu da aure. Bugu da kari, ana iya daukar su dawwamammun mazauna gaɓar teku, saboda suna cikin motsi akai-akai don neman abinci, kuma basu taɓa samun “gida” ba.
A matsayin abinci, an zaɓi ƙananan dabbobi don farauta. Yawancin lokaci, menu nasu ya ƙunshi wakilan hydroids, sponges, jellyfish, sitiriyon teku, bryozoans, har ma da kwai na mollusks daban-daban.
Kamar yadda kake gani, “abincin” mollusks na nudibranch ba ya bambanta da saurin motsi, amma ba zai yiwu ba, saboda "mafarautan" da kansu suna motsawa a hankali kuma suna wahala.
Nudibranch mollusks an kiyaye shi daga maƙiyansu ta hanyar launuka iri-iri: jiki mai fenti a cikin launuka masu haske na taimaka musu su ɓoye tsakanin murjani, a bangon dutse na dutse, ƙananan tsire-tsire kuma ba a gane su ba.
Amma wani lokacin “katon ido mai-girma” kifayen da kifi har yanzu suna lura da wata halitta mai kama da juna, sannan babu wani abin da ya rage ga ƙwarƙwarar nudibranch ta zama abincin wani.
Nudibranch
Nudibranch | |||
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![]() Phyllidiopsis papilligera | |||
Tsarin kimiyya | |||
Mulkin: | Eumetazoi |
Squad: | Nudibranch |
- Nudibranchiata
- Gymnobranhiata
- Gymnobranhia
Nudibranch (lat. Nudibranchia) - ɓataccen ƙwayar marine na Heterobranchia na ruwa. Fasalin fasalin sun hada da rashi harsashi da alkyabba mai fasali. Kwalayen fata sakandare su ne wadanda basu da kariya ta kariya daga nau'ikan siffofi daban-daban kuma suna kan bangarorin ko gefen jikin mutum; Mafi yawanci zaune a cikin ruwa tekuna da kuma teku. Wasu nau'ikan suna da guba kuma suna da launi mai haske. Duk nudibranchs sune hermaphrodites. Very picky game da abinci.
Rarrabawa
Tun daga Yuli 2018, 'yan wasan sun hada da ƙananan ƙananan bayanai da superfamilies:
- Cladobranchia na ƙasa
- Supereamily Aeolidioidea Grey, 1827
- Superfamily Arminoidea Iredale & O'Donoghue, 1923 (1841)
- Dantronotoidea Allman, 1845
- Doridoxoidea Bergh, 1899
- Superfamily Fionoidea Grey, 1857
- Superfamily Flabellinoidea Bergh, 1889
- Superfamily Proctonotoidea Grey, 1853
- Superritamily Tritonioidea Lamarck, 1809
- Subor Doridina
- Kayan aikin Lantarki na wanka
- Babbar wasan wanka da Bergh, 1891
- Infraorder Doridoidei
- Superoramily Doridoidea Rafinesque, 1815
- Supercamily Onchidoridoidea Grey, 1827
- Superfamily Phyllidioidea Rafinesque, 1814
- Polyceroidea Alder & Hancock, 1845
- Kayan aikin Lantarki na wanka