
thadaakam chab

canadayilum american aikyanaadukalude chila bhagangalilum kaanapedunna shudhajala cyprinid malsyamaanu lake chab (cusius plumbius). ellah vadakke american minokalilum, ettavum vadakke vitharanamulla onnaanith. athinte janussaaya koosiyasine innu monotypic aayi kanakkakkunnu. holotype maathruka shekharicha eliot koosinte perilaanu eee januss ariyappedunnathu.
vivaranam.
shareeram fusiform alppam neelamullathumaanu. ithinu saadhaaranayaayi 100 muthal 175 millimeter (4 muthal 7 inch vare) neelamundu, ivide paramavadhi neelam ekadesham 225 millimeter (9 inch) aanu. purambhaagam olivu-braun allengil irunda thavitt niramullathaanu, vashangal leden silver aanu, athinaal eee malsyathinte shaasthreeya naamatthil ledine soochippikkunna plumbius enna vaakk. mookk moorchayullathum mukalile chundinu alppam appurathekku neengunnathumaayirikkum. wayinte konukalil oronninum oru cheria barbell undu. skeyilukal cheruthenkilum nannayi drishyamaanu, chilath karuthathum thaazhathe vashangalil otappetta irunda paadukal undaakkukayum cheyyum. dorsal, pelvik, guda chirakukalkk oronninum 8 kiranangalund. pectoral chirakukalkk veethiyullathum 13-18 ullathum ennaal saadhaaranayaayi 15-16, kiranangalullathumaanu. malsyathinu pallukaloo adipose chirakukalo nattellukaloo illa. vaaya thaarathamyena cheruthaanu, wall fork cheythirikkunnu. prajananakshamamaya aanthumbukalkku pectoral chirakukalude adithattilum chilappol vaayaykk sameepavum thilakkamulla ooranchu allengil chuvapp paadukalum thalayude mukalil cheria vivaha kizhanguvargangalum pectoral kiranangalude dorsal uparithalavum vayattil pectoralukalude adithattinaduthum undakam. praayapoorthiyaakaathavar muthirnnavarkk samaanamaanengilum avarkk prathyakshamaaya mottling allengil stripe kuravaanu. penpakshikal saadhaaranayaayi aanpakshikalekkaal valuthaanu.
vitharanam.
kaanadayiludaneelam artic vritham vare eee thadaakam saadhaaranayaayi kaanapedunnu. vadakkan american ikyanaadukalilum, kooduthal krithyamaayi nyoo englandu, mishigan, ayowa, visconsin, minnesota, dakota, mondaana, vyoming, colorado, washington, idaho, utta ennividangalilum chitharikkidakkunna chila janasamkhyayundu. alaskayil vasikkunna eaka minau koodiyaanu chub thadaakam. illinoyisile mishigan thadaakavum vyomingile plait nadeethadavum ithinte shreniyil ulppedunnu. misauri nadiyude mukalile drainejil thadaakatthinte avashishtangal undu.
aavaasavyavastha.
athinte pothuvaaya peru soochippikkunnathu pole, shudhamaaya charal ulla thanutha vella thadaakangalilaan eee thadaakam saadhaaranayaayi kaanappedunnath, koodaathe thanutha vellathilulla nadikalilum aruvikalilum ithu jeevikum. ithu palappozhum aazhamillaatha avasthayilaanu jeevikkunnath, ennaal venalkkaalathinte madhyathil, thadaakatheeratthe choodulla vellam ozhivakkaan thadaakatthinte aazhameriya bhaagangalilekku neengiyekkaam.
bhakshanakramam.
thadaakatthile chabbinte bhakshanakramam vaividyamaarnnathaanu janthujaalangal, praanikal, jalapraanikalude laarvakal, aalgakal. ettavum valia vyakthikalkk cheria malsyangale pidikkaan kazhiyum. thadaakatthile chab thanne valia kollayadikkunna malsyangalkku kazhikkaan kazhiyum, athinaal ithu malsyabandhanathinu anuyojyamaanu.
valarcha.
kaattamaaran aruvi, nyoo brunswick, canada, thadaakatthile 5 centimeter (2 inch) neelamulla kuttichedikal ennivayil venalkkaalath prathimasam ekadesham 0.8 centimeter (0.3 inch) valarunnathayi kandethi.
punarnirmmaanam.
muttayidunna samayat, thadaakatthile aann chab penthumbikale pinthudarum. muttayidunnathinu thayyaraya aankuttikal oru penkuttiye charge cheyyum, ithu avale mukalilekku neenthan kaaranamaakunnu, chilappol jalathinte uparithalam thakarkkunnu. purushanmaar penkuttiykk sameepam neenthunnu, onniladhikam purushanmaar undengil, avar penkuttiyumayi malsarikkunnathinu parasparam aduthu neenthunnu. eee prakriyayil, penn oru paarayilekku neenthunnathuvare aann vaaya thurakkukayum adaykkukayum cheyyum, backie aann avalude muttakal vidunnathuvare avalkkethire neengunnu.
thadaakatthile kuttichedikal saadhaaranayaayi venalkkaalathinte thudakkathil muttayidunna kudiyettatthinu vidheyamaakunnu. thanuppulla varshangalil kudiyettam vaikunnathinaal kudiyettam aarambikkunnathil thaapanila oru punk vahikkunnu. kudiyerunna kuttichedikal avarude thadaakangalum nadikalum upekshichu poshaka aruvikalilekku kayarunnu, athil avaa inacherunnu (pakalum rathriyum) koodaathe charal allengil paarakalkk mukalil muttakal vidunnu. maathaapithaakkalude paricharanamilla. kudiyettasamayathu malsyangal kooduthalum vaikunnerathum raathriyilumaan neengunnathu.
perumaattam.
laboratariyil, thadaakatthile chabbukal swathanthramaayi oodunna syrcadian thaalangal prakadippichittundu, avaa innuvare padicha churukkam chila malsya enangalil ettavum krithyamaanu. eee malsyangal saadhaaranayaayi laboratariyil divasenayullavayaanu, ennaal kaattile avaa divasenayullatho, crepuscular allengil raathrikaalamo aakam.
thadaakatthile chabbinte thalachoril valia opttik lobukalundu, athinaal ithu oru nalla kazhcha nalkunnathaanennu karuthappedunnu. ennirunnaalum, raathriyilum ithinu bhakshanam nalkaan kazhiyum. mattu shudhajala malsyangalaaya sticklebaakku, northen paikk, sculpin, burboat ennivayumaayi thaarathamyam cheyyumbol ithinu mikacha kelvi sheshiyundennu velippettittund.
pothuvaaya peru.
thadaakathe chilappol northen chab, lake northen chab, chab minoo, plumbius minoo allengil boatlefish enningane mattu perukalil vilikkunnu. eee inam cubeckilum kaanapedunnu, athinte franch peru "mene dii laaku" ennaanu. mishigan thadaakatthile chubukal ennu vilikkappedunna mishigan thadaakathil vasikkunna "corgonus" janussile vividha sisko inangalumaayi eee thadaakathe thettidharikkaruthu.
thirichariyal.
upajaathikal.
thadaakatthile chubinte moonnu vyathyastha upajaathikal thiricharinjittundu "sii. pii plumbius, "sii. pii greeny ", munbu" sii "ennariyappettirunna onnu. pii disimilis ". sii" ennathinu oru peru ippol labhyamalla. pii disimilis ".

