Duananan ducks (Aythya affinis) na dangin duck ne, ba da umarnin anseriformes.
Rarraba ƙaramin kamun kifin.
Duck wani jinsin Ba'amurke ne na agwagwar ruwa. An rarraba shi a cikin gandun daji da wuraren shakatawa a Alaska, Kanada da Amurka a Arewa da Dakota ta Kudu, Montana, Wyoming, arewa maso gabashin Washington a yankin Kudancin Oregon, da arewa maso gabashin California.
A lokacin hunturu, yana zaune a wurare masu dacewa a cikin yankunan bakin teku na Pacific, gami da Colorado, kudu maso gabashin Florida, da kuma Atlantic Coast na Massachusetts. Hakanan, wannan nau'in agwagin yana bayyana a kudancin gefen manyan tabkuna da kuma cikin kogin Ohio da Mississippi. Duananan raƙuman hunturu a cikin Mexico da Amurka ta Tsakiya, a cikin Antilles da Hawaii. Wani lokaci ana lura da shi a lokacin sanyi a Yammacin Palaearctic, Greenland, Tsibirin Burtaniya, Tsibirin Canary, da Netherlands.
Saurari muryar karamin shaidan.
Mazaunin tartar.
Cksananan agwagi sun fi son wuraren kiwo don ciyarwa da kiwo. Ana samun su duk tsawon shekara, ko dai na dindindin ko na lokaci-lokaci, a cikin tafkunan ruwa tare da tsire-tsire masu tsiro na reeds da ruwa - pondweed, arowatic yarrow, hornwort. Ducks sun fi son jikin ruwa tare da adadi mai yawa na amphipods kuma mafi yawan, ciyawar cikin ruwa da ba a taɓa ba.
Ana samun su a cikin ruwa mai daɗi da kuma gandun daji masu ɗan kaɗan, gami da kandami, tabkuna, koguna, da kuma gabar teku. Zuwa ƙarami, ana zaɓar makiyaya da ciyawa kusa da wuraren ruwa.
Alamomin waje na Scananan Launi.
Duck Duck ɗan tsaka-tsaka ne. Maza sun fi mata girma kaɗan kuma suna auna 40.4 zuwa 45.1 cm, mata 39.1 zuwa 43.4 cm. Weight: 700 zuwa 1200 g a maza kuma daga 600 zuwa 1100 g a mata. Fuskokin ducks na canzawa a duk tsawon shekara. Namiji yana da shuɗi mai launin shuɗi, kai mai ɗanɗano-baƙar fata, nono, wuya, wutsiya a lokacin saduwa (daga watan Agusta zuwa Yuni na gaba) Bangarorin da ciki farare ne, kuma bayanta fari ne da lafazin launin toka.
Mace launin ruwan hoda ce, tare da inuwa masu haske a jikin gashin, kai jajaye ne, tare da tabo fari a gindin wani baƙin toka mai launin toka. A cikin duka mutane, gashin tsuntsaye na firamare na fari fari ne a ƙarshen; farin yadi ya tsaya a saman gefen saman fiffin sama. Launi na iris ya dogara da jinsi da shekaru. Launi na iris na ido a cikin kajin launin toka ne, a cikin agwagin samari ya zama rawaya-kore, sannan kuma rawaya mai duhu a cikin mazan da suka balaga. Launi na iris a cikin mata ya kasance mai launin ruwan kasa.
Cksananan ducks suna da wuya a rarrabe daga nau'ikan da ke da alaƙa, musamman daga nesa.
Sake haifuwa da karamin agwagwar teku.
Ananan tsuntsayen tsuntsayen tsuntsaye ne masu haɗuwa. Nau'i-nau'i suna yin su a ƙarshen bazarar hijirar kuma tsuntsayen sun kasance, sannan mace ta zauna don baƙwan ƙwai.
Yawan ganga da oviposition yana cikin watan Yuni. Mace da namiji suna zaɓar wuri tare da ƙaramin rami tsakanin ciyayi masu ciyawa. Tsuntsayen suna layi a ciki tare da ciyawa da fuka-fukai, suna ba wa gida fasalin zagaye.
Mace na yin 6 zuwa 14 kwai koren kwai.
Yawanci kwai 1 a kowace rana kuma yana fara kyankyasar kwana ɗaya ko biyu kafin kwancen ƙarshe ya tashi. Wasu agwagwan sukan sa kwan su a gidajen wasu matan. Manyan kamala suna halayyar al'ummomin kudanci; a cikin jama'ar arewa, agwagi ba su da ƙwai. Namiji ya bar mace kuma ya ajiye daban tsawon lokacin shiryawa a watan Yuni, kimanin kwanaki 21 - 27. Mace ce kawai ke ɗaukar ƙwai kuma tana kula da zuriyar. Ducklings suna bin agwagwa ta manya kuma suna ci da kansu, da farko suna tara abinci daga saman ruwan, kuma bayan makonni 2 sai su nitse cikin ruwan. Mace tana jagorantar agwagwa na tsawon makonni 2 zuwa 5, galibi tana barin dabbar kafin yaran agwagwan su fara tashi.
Ducklings a cikin ƙaramin agwagwa yana tasowa daga manyan ƙwai a lokacin dumi, saboda haka, suna da ƙimar rayuwa fiye da sauran nau'ikan da ke da alaƙa da dangin duck. A mafi yawancin lokuta, mutuwar kajin na faruwa ne a cikin weeksan makonnin farko bayan ƙyanƙyashe sakamakon ƙaddara ko kuma rashin sanyi. An yi imanin cewa kajin daga cikin agwagwar tartar ya bayyana a ƙarshen lokacin kiwo a lokacin da amphipods ke iyo sosai a jikin ruwa - babban abincin waɗannan agwagwan. Cksananan agwagi na iya tashi na kwanaki 47 - 61 bayan bayyanar su. Maza da mata suna haihuwar zuriya don shekara mai zuwa, kodayake a ƙarƙashin yanayi mara kyau, ana iya jinkirta haifuwa zuwa wani lokaci.
Matsakaicin adadin rayuwar rayuwar agwagwa a cikin daji shine shekaru 18 da watanni 4.
Abubuwan halaye na tartar.
Duananan ducks sune zamantakewar jama'a, tsuntsaye marasa tashin hankali. Suna jure kasancewar wasu jinsunan, banda farkon lokacin kiwo, lokacin da maza ke kare mata.
A lokacin hunturu, agwagi suna yin manyan garken tumakin da suke ƙaura.
Nau'ukan kiwo ba sa kare yankinsu, a maimakon haka suna da ƙananan yankuna waɗanda sau da yawa sukan sauya girman a lokacin kiwo. Yankin yankin ya fara ne daga hekta 26 zuwa 166. A lokacin hunturu, ƙananan agwagin teku suna yawo zuwa yankunan da ke da yanayi mai kyau. Bayan hunturu, mata suna komawa wuraren asali a cikin shekaru masu zuwa, maza ba koyaushe suke yin hakan ba.
Ciyar da tartar.
Cksananan agwagi, manya da yara agwagwa suna ciyar da kwari, crustaceans da molluscs. Wani lokacin kuma suna cin kwayar tsire-tsire na ruwa kamar su lili na ruwa da kwandon kwai.
Tsuntsaye suna ciyarwa a cikin ruwa mara zurfi, suna nitsewa cikin ruwa buɗe.
Suna nutsewa a kusurwa kuma suna bayyana a saman 'yan mitoci daga wurin da suka nutse. A mafi yawan lokuta, kunkuru suna cin abincinsu a karkashin ruwa, amma wani lokacin sukan ja shi zuwa gabar don cire sassan da basa cin abinci. Abincin zai bambanta dangane da wadatar lokacin abinci da mazauninsu. Lacustrine amphipods, chironomids, and leeches (Hirudinea) suna da mahimmin bangare a ciyarwa. Mollusks da tsaba suna shuka kayan abinci; a wani lokaci, agwagwa suna cin kifi, caviar da ƙwai a wasu lokuta na shekara. Ciyar iri ta mamaye kaka.
Matsayin kiyayewa na tartar.
UCananan ducks ana ɗaukar su da yawa ta IUCN kuma ba'a barazanar su da halaka. Babban yalwa da fadi da kewayon ƙasa suna nuna daidaitaccen yanayin jinsin. Wannan shine ɗayan sanannun nau'ikan ruwa a Arewacin Amurka. Koyaya, an bayar da rahoton raguwar yawan yanki. Wasu alumma suna rayuwa cikin lalataccen yanayi, tare da lalata yankuna masu dausayi da haɓaka gurɓataccen yanayi. An gano manyan matakan selenium a cikin hanta na agwagwa a cikin yankin Great Lakes, amma babu alamun alamun guban tsuntsaye a wasu yankuna. Karatun ducks a lokacin kwanciya a Arewacin Amurka sun nuna cewa ƙarancin abinci da damuwa suna haifar da rage aikin haihuwa kuma yana shafar haihuwar agwagwa a Arewacin Amurka.
