Eel

European river eels ihove dzinonakidza. Vanoshambira kusvika kumakiromita 5000 kuti vabereke: kubva kunzizi dzeEurope mhiri kweAtlantic kusvika kuGungwa reSargasso.

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Ko rwizi rweEuropean river eel runotaridzika sei?

European river eels ndeyemhuri ye eel uye hazvikanganisi nemiviri yadzo mirefu, mitete. Musoro wakatetepa uye hauna kumira kunze kwemuviri, uyo wakatenderera muchikamu-chikamu. Muromo uri pamusoro, kureva kuti shaya yezasi yakati rebei pane repamusoro. Pakutanga kuona, eel inofanana nenyoka. Zvimbi zvepectoral zvinogara kuseri kwemusoro, zvimbi zvepelvic hazvipo. Zvimbi zvekumashure, zvekumashure uye zvekumashure hazvifananidzi zvimbi zvehove. Idzo dzakatetepa uye dzakaita semipendero uye dzinomhanya dzinenge muviri wese.

Kumashure kune dema kusvibira, dumbu reyellow kana sirivheri. Varume nehadzi dzenzizi dzenzizi dzakasiyana muhukuru: varume vanongoreba 46 kusvika 48 centimita, nepo vakadzi vane 125 kusvika 130 centimita uye vanorema kusvika makirogiramu matanhatu.

Eels anogara kupi?

Iro European river eel inowanikwa muEurope yose kubva kugungwa reAtlantic mhiri kweMediterranean kusvika kuNorth Africa neAsia Minor. Eels ndeimwe yehove dzinogona kugara mumvura ine munyu, mvura yakachena uye brackish mvura.

Ndeapi marudzi eeel aripo?

Pamusoro peEuropean, kunewo American river eel, marudzi ese ari maviri akafanana. Kune mamwe marudzi muAsia neAfrica. Anosvika zana nemakumi mashanu emarudzi emaconger eels zvakare ndeemhuri imwechete. Iwo anowanikwa mumakungwa kubva kunzvimbo dzinopisa kusvika kunzvimbo dzine mwero, asi usamboenda kumvura yakachena.

Maeels anosvika makore mangani?

Eels anotamira kuGungwa reSargasso kunoberekana anofa mushure mekubereka. Varume vanozoita gumi nevaviri, vakadzi vanosvika makore makumi matatu. Zvisinei, kana mhuka dzikadziviswa kutamira kugungwa uye kuberekana, dzinotanga kudya zvakare uye dzinogona kurarama makore anosvika makumi mashanu.

Maitiro

nzizi dzemurwizi dzinorarama sei?

Nzizi dzemurwizi imhuka dzeusiku. Masikati vanohwanda mumapako kana pakati pematombo. Kune misiyano miviri yeEuropean river eel: dema eel, iyo inonyanya kudya magakanje madiki, uye chena eel, iyo inonyanya kudya hove. Asi zvose zviri zviviri zvinoitika pamwe chete.

Eels imhuka dzakasimba kwazvo. Vanogona kurarama panyika kwenguva yakareba uye vanogona kunyange kukambaira pasi kubva kune imwe mvura kuenda kune imwe. Izvi zvinodaro nekuti ivo chete vane madiki magill kuvhurwa uye vanogona kuvhara. Vanogonawo kutora oksijeni kuburikidza neganda.

Kana chando chasvika, dzinoenda mumvura dzakadzika dzenzizi dzozviviga mumatope. Aya ndiwo maponero azvinoita muchando. European river eels dzinonzi catadromous migratory fish: dzinotama kubva kunzizi nemadziva kuenda kugungwa kuti dzibereke. Zvakapesana ndizvo zvakaita hove dzinonzi anadromous migratory fish dzakadai sesalmon: dzinotama kubva mugungwa dzichienda kunzizi kuti dzibereke.

Shamwari nevavengi veeel

Eels - kunyanya pwere - ndidzo dzinonyanya kubatwa nedzimwe hove dzinodya.

Eels inobereka sei?

Pakati paKurume naChivabvu, mamilimita mashanu kusvika manomwe anochochonya muGungwa reSargasso. Iwo ane ribhoni-akaumbwa uye akajeka. Vanonzi "willow leaf larvae" kana kuti leptocephalus, zvinoreva "musoro wakamanikana". Kwenguva refu, dzaifungidzirwa kuva mhando dzakasiyana dzehove nokuti hadzina kutaridzika senge eel dzakura.

Makonye madiki anogara munzvimbo yepamusoro yemvura uye anoyerera kumabvazuva muAtlantic neGulf Stream. Pashure pegore rimwe kusvika kumatatu, pakupedzisira vanosvika kugungwa risina kudzika, riri pamhenderekedzo yegungwa kubva kukondinendi yeEurope uye kubva kuNorth Africa. Pano mhunga inoshanduka kuita inonzi magirazi eel, ayo akareba 65 millimeters uye zvakare akajeka. Kwenguva yakati vanogara mumvura ine brackish, semuenzaniso munzvimbo dzemvura inosanganiswa nemvura yakachena uye yemunyu.

Munguva yezhizha, girazi eels inosviba uye inokura nesimba. Vamwe vavo vanogara mumvura ine brackish, vamwe vanotama vachikwira nenzizi. Zvichienderana nehuwandu hwekudya uye kutonhora, maeel anokura nekumhanya kwakasiyana: pamhenderekedzo yeNorth Sea, mhuka dzinenge masendimita masere kureba mumatsutso ekutanga mushure mekunge dzasvika kumahombekombe, uye kusvika masendimita makumi maviri pagore gare gare. Idzo dzava kunzi yellow eel nekuti dumbu radzo rakaita yero uye kumusana kwaro kune grey-brown.

Pashure pemakore mashomanana, eels anotanga kuchinja. Izvi zvinotanga pazera remakore matanhatu kusvika mapfumbamwe kuvarume uye pakati pemakore gumi ne10 kuvakadzi. Musoro wemboro unobva wawedzera kunanga, maziso akakura, uye muviri wakasimba uye une tsandanyama. Musana unova wakasviba uye dumbu rine sirivheri.

Zvishoma nezvishoma gadziriro yekugaya inodzikira uye mazizi anomira kudya. Shanduko iyi inotora mavhiki mana uye dzava kunzi silver eels kana silver eels - nekuda kweruvara rwedumbu radzo.