潛鴨 的英文怎麼說
中文拼音 [qiányā]
潛鴨
英文
pochard-
Diving and estuarine ducks
潛鴨與河口鴨A comprehensive appraisal of morphologic evolution strongly infers that d. glomerata with upright inflorescences have more potential for development
4 ）從形態學特徵及相關農藝性狀分析，花序直立的鴨茅更具開發利用潛力。Phylogenetic analysis surports that anseranas should be placed in monotypic family anseranatidae, and the whistling ducks and the white - backed duck should be separated from subfamily anserinae and placed them into family dendrocygnidae. the family anatidae could be classified into two subfamilies, anserinae and anatinae. the results approve that the swans should be put into the tribe cygnini of subfamily anserinae as suggested by livezey ( 1996, 1997b ) and the shelducks should be placed in the tribe tadornini of subfamily anatinae, therefore, our results do not support sibley and ahlquist ' s ( 1990 ) establishment of the subfamily cygninae and placing the shelducks in the tribe anserini
研究結果表明： 1 ）雁形目鳥類12srrna基因有較多的堿基插入和缺失，堿基轉換數高於顛換數； 2 ）贊同將鵲鵝（ anseranas ）置於鵲鵝科（ anseranatidae ）中，樹鴨（ dendrocygna ）應從雁亞科（ anserinae ）中獨立出來設立樹鴨科（ dendrocygnidae ） ，白背鴨（ thalassornis ）隸屬于樹鴨科； 3 ）鴨科（ anatidae ）可分為雁亞科和鴨亞科（ anatinae ） 2個亞科，不贊同sibley & ahlquist （ 1990 ）設立天鵝亞科（ cygninae ）及將麻鴨歸入雁族（ anserini ）的觀點，支持livezey （ 1996a ， 1997b ）的觀點建議將天鵝類歸為雁亞科天鵝族（ cygnini ） ，麻鴨置於鴨亞科下麻鴨族； 4 ）在鴨亞科內的系統發生上，潛鴨最早分歧出來，麻鴨、海中文摘要鴨及棲鴨彼此iaj的親緣關系較近；河鴨族為一單系發生群，在系統演化中形成獨立的一支。The area is the largest wetland in hong kong. the wetland acts as a refueling station and wintering site for thousands of migratory birds during their migrations between the arctic russia and australia. the total migratory birds using the area may be over 120, 000
該濕地是本港最大的一片，在冬季有超過5萬只候鳥在該處渡冬，當中包括如黑臉琵鷺、黑嘴鷗、花臉鴨、青頭潛鴨及卷羽鵜鶘等世界性瀕危的品種。Prevention and cure of the derzsy ' s disease depended on vaccine and antiserum, antibodies of eggs. the vaccines includes goose embryo and duck embryo vaccines which were used 1n breed goose and goslings, and those vaccines have great effect in breeding goose, but the entire virion live vaccines and attenuated vaccines exist many deficiencies. such as preclinical infection, dissemination of virus, recovery of viru5, etc. those proplems can be sol / ed by producing genetic engineering " asclne
目前使用的疫苗分為種鵝用和雛鵝用的鵝胚和鴨胚化疫苗，這些疫苗在實際生產中發揮巨大作用，因其為全毒苗或弱毒苗，存在著潛伏感染，排毒散毒，毒力返祖的缺陷，基因工程疫苗的研製可解決上述問題。Potential ecological risk index was applied to assessing the sediments of yaer lake, hubei province before and after dredging, which can provide scientific basis for the decision making and management of environment agencies
摘要通過對鴨兒湖底質在工程清淤前後的潛在生態風險評價，為環境保護管理部門的決策和管理提供科學的依據。Be amazed by the reef ' s intricate coral formations, ornate reefs and more brilliantly coloured fish than you could shake a stick ( or flipper ) at
大堡礁迷宮般的珊瑚造型，華美的礁石，以及色彩斑斕的魚群會令你瞠目，顧不得朝著魚兒晃動棍棒或潛水服的鴨腳板了。分享友人