溯河

我们乘坐平底长船溯河而上到格兰切斯特，在草地上举行野餐。

We punted up towards Grantchester and had a picnic in a meadow .

中华鲟（Acipensersinensis）是在我国东海、黄渤海大陆架生长，到长江上游金沙江下段或珠江上游江段繁殖的大型溯河洄游鱼类。

The anadromous Chinese sturgeon ( Acipenser sinensis ) mainly lives in the continental shelf of the Yellow Sea and East China Sea , and spawns in the Yangtze River and Pearl River .

本文提供了一种基于DIDSON的溯河洄游幼香鱼计数的新方法。

In this paper we present a new method for counting small size juvenile ayu that migrates upriver using a DIDSON .

他们坐平底船溯河而上，而且在岸边露营。

They punted up the river and camped by the bank .

他溯河而上，寻找源头。

He followed up the river and found its source .

鳗苗的溯河生态和资源量测算；

Ecology of upstream migration and estimation of resource amount of glass eel .

我们溯河而上直到它的源头。

We traced the river to its source .

它们只有为了繁殖才会溯河而上。

They only travel up rivers to breed .

河口地区沉积物的溯河搬运

Upstream Transportation of Sediment in Estuary

北太平洋溯河鱼类委员会

North Pacific Anadromous Fish Commission

彩虹鳟中的溯河产卵海鱼，较淡水种类体型大，斑点颜色淡。

The anadromous variety of rainbow trout , being larger and having darker spots than the freshwater variety .

中华人民共和国对源自本国河流的溯河产卵种群，享有主要利益。

The People 's Republic of China enjoys the primary interests in the anadromous stocks that originate in its rivers .

辽宁黄海沿岸鳗苗的溯河生态与资源

Ecology and resource on the upstream migration elvers of Japanese eel ( Anguilla Japonica ) in coastal waters of the Yellow Sea

文中提出的耳石中心核的定位方法适用于所有溯河或降河洄游的鱼类。

An efficient and precise method was proposed to locate an otolith core , which can be applied on any species of migratory fishes .

食性转化期为5～6月，又是溯河期，体长为51～98毫米。

Feeding habit changes from May to June at the body length of 51 to 98 mm and meanwhile it is the upstream period .

结果表明，仔鳗溯河性生态失调死亡率为49.8%（可信限为46.3～53.3%）；

Results obtained show that the upstream ecological disturbance disease mortality was about 49.8 percent ( confidence limit was 46 . 3-53 . 3 percent );

大多数迁移鱼类（如鲑鱼和鲱鱼）是溯河产卵种群。它们在淡水产卵，成年后生活在咸水中。

Most migratory fish , such as salmon and shad , are anadromous , spawning in fresh water and living as adults in salt water .

辽东半岛（黄海北部）溯河鳗苗食性的初步研究

Preliminary study on the feeding habit of the upstream migratory elver of Japanese eel ( anguilla japonica ) in the estuary of Northern Yellow sea , china

鳟鲑鱼科的各种淡水或溯河性食用及捕钓鱼，尤指鲑鱼属和红点鲑属，通常身体呈流线形，有斑纹，鳞片等。

Any of various freshwater or anadromous food and game fishes of the family salmonidae , especially of the genera Salmo and salvelinus , usually having a streamlined , speckled body with small scales .