Under light microscope, the egg is an oblated and agglutinated demersal with a narrow perivitelline space; eggs ranged in diameter from 1.95 to 2.38 mm with a mean of 2.18 ± 0.03 mm; their membrane are smooth and they have 5 to 7 cannular keratose egg-filaments; the oil globules are multiple, ranged in diameter from 0.05 to 0.50 mm and in number from 7 to 145 with a mean of 28±2, the position of them migrate during embryonic development; the yolks are ivory-white with no segments, ranged in diameter from 1.00 to 2.30 mm with a mean of 1.90 ± 0.03 mm; the development phases of the embryo are variable. So they were identified as the eggs of one Beloniformes.

在光學(xué)顯微鏡下：卵呈微扁圓形美女被操网站啪，卵徑1.95~2.38mm，粘著沉性；卵黃間隙較窄，卵黃囊呈乳白色日韩一区在线观看，無龜裂；卵膜平滑亚洲欧洲国产码专区在线男男，在其表面有5~7根細(xì)長角質(zhì)管狀卵膜絲日韩手机福利写真网站；多油球數(shù)不定（4~145），油球徑0.05~0.50mm欧美另类激情视频在线观看，油球在卵黃囊中的位置隨不同的發(fā)育時期而不斷發(fā)生變化自拍日韩在线观看视频网站免费；胚體處在不同的發(fā)育階段，其特征符合頜針魚目魚卵的特征国产福利在线观看免费第一福利。

Based on otter trawl catch rates of five surveys conducted by South China Sea Fisheries Research Institute from 1961 to 1999, changes in demersal trawling fishery resources in the northern South China Sea were analyzed.

摘 要：利用1961~1999年期間南海水產(chǎn)研究所5次漁業(yè)資源調(diào)查的底拖網(wǎng)漁獲率數(shù)據(jù)，分析了南海北部底拖網(wǎng)漁業(yè)資源的數(shù)量變動美女黄片视频大全。

This finding emphasizes the wealth of discoveries to be made in pelagic and deep demersal habitats.

有4個物種生活在靠近海底的地方美美女一级A片视频，它們當(dāng)中有3種生活在水柱的更高處。

Euphausiids supplied most of the food intake for the pelagic fish communities, followed by copepods, amphipods and sagitta, while the most important food resources for the demersal fishes were shrimps and fishes as well as euphausiids.

磷蝦類是中上層魚類最主要的食物來源毛片网站在线免费播放，其次是橈足類欧美日韩性爱AAA视频、端足類和毛顎類；蝦類和魚類是底層魚類最主要的食物來源国产东北老妓女视频在线播放，其次是磷蝦類国产东北老妓女视频在线。

The eggs, measuring 1.5-1.8 mm in diameter, were demersal strongly sticky, almost spherical in shape, transparent and unpigmented, with a pale yellow yolk and no oil globule and 2.3 - 2.5 mm after absorbing water.

另外采用組織學(xué)、組織化學(xué)對其原始器官分化91亚洲精品自在在线观看不卡的，在顯微水平上進(jìn)行了研究欧美日韩美女1000，結(jié)果表明：成熟卵圓形，卵徑1.5～1.8mm国内JIZZ，淡黃色亚洲午夜A∨无码毛片久久、透明、沉性亚洲精品福利视频、具強(qiáng)粘性激情偷乱人伦文学。

demersal：居于水底的

demerit 缺點 | demersal 居于水底的 | demesmerize 脫離催眠

demersal：水底的

demersalpopulation底棲種群 | demersal水底的 | demesticuser國內(nèi)用戶

demersal：沉于水底的

demerit 記過過失 | demersal 沉于水底的 | demi column 嵌墻柱

demersal：底棲動物

底棲的 benthic | 底棲動物 demersal | 底棲生物 benthos

demersal fish：底棲魚

deleterious gas 有害氣體 | demersal fish 底棲魚 | Demonstration projects in the field of the environment 環(huán)境領(lǐng)域的示范項目