Giant clam - chikuru dzemugungwa

Ndine chokwadi vazhinji makanzwa kuti mukuru clam akanga abatwa 1956 nemhenderekedzo chitsuwa Japanese pakati Ishigaki. Vakatendeukira kuna kuva hofori clam, vesivshaya 333 makirogiramu ane kureba 1.16 mamita. Averenga nyaya chanhasi, uchadzidza zvakawanda pamusoro vagere pasi pemvura yakadzika.

dzinogarisana

Hofori idzi anogara pakadzika Indian uye Pacific mumakungwa. Asi umambo chaicho clams anonzi Mukuru Chipingamupinyi Dzedu Dziri, rakamiswa nemhenderekedzo kumabvazuva Australia. Zviri pano, ari guru dzezvimwe ose njere, dzine vashoma nemhando dzose korari kumusha guru dzemugungwa.

Uyezve, anogona kuonekwa muGungwa Dzvuku. Zvinofadza kuti vanogara havasi chete mvura shoma, asi ukuru asingapfuuri zana mamita.

STRUCTURAL zvinhu

Giant clam goko ane hombe rine ichibhabhamisa maviri rinotungamirirwa kumusoro. Nejasi mollusc Hakuna mumwe peganda pazvirugu. Inoitwa maviri akaturikidzana. Outdoor - ferrous uye akaisa pamusoro wechipfuwo inokosha cilia kufamba kuburikidza nemvura anopinda jasi mhango.

Mukuwedzera, chikuru dzemugungwa munyika ine gills, akafanana dzakachinjwa ctenidium. Mumwe nomumwe wavo une ndiro migove miviri. sezvikamu aya chokuita mumwe achishandisa kunzi filiform petals. Gills clams basa Sefa basa, kunotadzisawo zvokudya zvacho. Uyewo ichi guru rakadzika gungwa anogara, pane V-zvakaumbwa itsvo, mumwe mugumo iyo inotanga kupinda pericardium, uye wechipiri - iri jasi mhango.

PFUPI KUTSANANGURWA chitarisiko

Just ona kuti ichi clam hofori chinokushamisa wayo ukuru. Kureba inogona kusvika mamita rimwe nehafu, uye kurema anenge mazana maviri makirogiramu. Uyezve, vanozikamwa pamutemo zviitiko ndibate zvaitoshamisa specimens. Sezvambotaurwa, clams, akabata Japanese pamhenderekedzo, rikawira Book of Records.

Sezvineiwo, avhareji hunotarisira zvisikwa izvi chihombe upenyu anenge matatu emakore. Kudeuka clam chinoshamisa akasiyana-siyana. Zvakasikwa, pane kuchena, yero, zvitema, rima zvitema, tekoizi, girini uye mashava vanhu. Zvinonzi kwakaratidza kuti Hue pakutsvaga noruvara unicellular algae mhenyu jasi rwehofori. Kana singi, ayo mavara havasi kudaro siyana. Kazhinji, akafuka ivhu inoramba.

kubereka

Just cherechedza kuti mukuru clam - a hermaphrodite. Asi ivo nevamwe kuti vane unyanzvi pamuchinjikwa-muchangosangana. The makuru yevagari saizi clams, dzakanga mikana nechitarisiko vana vavo remangwana. Zvinozivikanwa kuti akura vanhu vakakwanisa kukanda mazai mamiriyoni akawanda.

Somugumisiro pakusangana kwavo kuonekwe mazai tuduku, uye gare gare ivo anochochonya kuita mazana munyoro anoshongwa, inonzi trochophores. Nokuti gumi mazuva anotevera, vachifambira pamwe plankton mugungwa mumvura. Pataikura, ivo kunyura kusvika pasi ndokutanga vachishingairira kutsvaka yakanaka nzvimbo musha yemberi. Awana yakakodzera substrate wechidiki tridacna namatirai kwairi achishandisa yakarukwa shinda. Sezvo vanokurukura izvi zvishoma nezvishoma kufa kuda. Yakura vanhu chinyararire avete pasi, vakabata parutivi warwo uremu.

Chii anodya guru clam?

Hwaro ake kudya vari plankton uye slurry zvinosanganisira makemikari nezvimedu mumvura mbiru. Simba akapa nokuda inonzwika apo mvura kupinda jasi mhango tridacna. The zvokudya hwakakanyiwa mvura, zvinofamba nokuda cilia. Somugumisiro, mumuromo clam, riri pedo pamberi tsandanyama-contactor, zvidimbu zvidiki zvokudya kuuya pre-aparadzana zvicherwa tsvina. Kubva ipapo vopinda yegurokuro uye ipapo mudumbu. Ekupedzisira anoendazve foregut, zvishoma nezvishoma kunochinja kupinda shure.

Uyezve, iyi hofori vagari megungwa uchidzidza symbiotic algae, kana zooxanthellae. Vakahwanda mukati merima mipendero nguo mhango pakati mollusc uye nenguva kugaya navo.

kunyoresa

Kubvira kare, kuti goko uyu vaRafa yakanaka vaishandisa vomunzvimbo sezvo chivakwa zvinhu. Mukuwedzera, avaindipa mhando dzose rwokugadzira uye zvemumba. Uyewo kubva mapapiro akavacheka-cheka denderedzwa anoshanda mari chaitika.

Apo neapo nokuti Tridacnids anovhima namaparera. Maererano nedzimwe mishumo, mune chimwe chiitiko dzemugungwa uremu akawanikwa anenge manomwe makirogiramu, uye panguva maviri navatatu masendimita refu. Mumakore achangopfuura, nyika goko zvisikwa izvi vari kushingaira mukakachurwa vashanyi. Naizvozvo, kukura chavagari hwave huchidzikira clams.