查询词典 Portunus

The background survey and tracking survey of artificial reef area in Chenghai Laiwu were carried out before and after reefing in 2003 and 2007, respectively. The results indicated that after the deployment of artificial reefs, the biomass density of fishery resources increased by 25.63 times, which were much higher than before. The resources species was much more abundant; total number increased from 23 to 41, which increased by 0.78 times. The crab resources sharply increased by 1.75 times after artificial reef were deployed. Harpodon nehereus and Portunus sanguinolentus , which did not appeared in background survey, now became the dominant species in tracking survey. There were high diversity indexes in artificial reefs area and control area in tracking survey. In conclusion, the results indicated that the fish-aggregating effect of artificial reef site has improved a lot, and the community structure and the habitat environment have been significantly improved.

摘 要：2003和2007年分别对澄海莱芜人工鱼礁区进行了投礁前的本底调查和投礁后的跟踪调查，结果表明，投礁后礁区海域游泳生物的资源密度明显比投礁前高，增加了25.63倍；礁区海域各类资源种类均比投礁前丰富，总种数由投礁前的23种增加至41种，比投礁前增加了0.78倍，其中，蟹类种数增加最多，增加了1.75倍；在本底调查中没有出现的经济种类龙头鱼 Harpodon nehereus 和红星梭子蟹 Portunus sanguinolentus 在跟踪调查中已成为主要优势种；Shannon-Wienver多样性指数在礁区和对比区均比投礁前有所增加。

The fresh-keeping effects of Portunus Trituberculatus were investigated. The results showed the efects were better when air components and ratios of MAP were CO2 50% N2 50%. Compared with coating package and MAP, vacuum packing could inhibit the production of melanin in Portunus Trituberculatus gills and legs and prolong storage period effectively at 0-4℃.

结果表明：气调包装气体配比为CO2 50%，N2 50%的保鲜效果较好；但真空包装与气调包装和涂膜包装的保鲜效果相比，0～4℃下，真空包装可有效抑制梭子蟹腮部和足部褐变并延长三疣梭子蟹保鲜期，保鲜效果好于气调包装和涂膜包装。

The parasite is 5-7μm in size, and oval in shapes, with two flagellums. Preliminary study showed that the dinoflagellate Hematodinium. sp was the main pathogen of the milky disease of Portunus trituberculatus.

进一步通过分子生物学方法，确定该寄生虫为血卵涡鞭虫Hematodinium sp。，初步认定其是引起养殖梭子蟹"牛奶病"的一种重要病原。

Based on the collected data from the investigation of otter trawl fisheries and of crab resources in South Fujian-Taiwan bank fishing ground during 1992 to 1995, main distribution area, fishing season, main reproductive season and characteristics of population of Portunus gradiator were discussed.

本文根据1992～1995年期间闽南、台湾浅滩渔场开展单拖渔业调查和蟹类资源调查中所收集的资料，阐述了该渔场拥剑梭子蟹主要分布海区、生产汛期、繁殖盛期以及群体组成特点，为今后合理利用和管理该资源提供科学依据。

Objective: To investigate the flavor substances in Portunus trituberculatus and Squilla Oratoria that came from Bohai Sea place of production.

目的：利用固相微萃取技术分析渤海产地三疣梭子蟹和口虾蛄肌肉中的风味化合物。

Results: SPME was effective to analyze the flavor substances in Portunus trituberculatus and Squilla Oratoria, 20 and 15 main volatile compounds were identified respectively by comparing their mass spectra with those contained in the NIST mass spectral database; among these compounds most of them were carbonyl and alcohols.

结果：固相微萃取技术有效提取了三疣梭子蟹和口虾蛄肌肉中的呈味物质，经过NIST质谱数据库和文献对照，分别确定了20种和15种主要呈味物质，大多是一些酸类、酯类、醛类、醇类等化合物。

At present, mainly engaged in fresh seafood, including (live conger \ Ankang fish \ fish liver \ Tile Fish \ tiger fish \ Portunus \ hairy \ abalone, etc.)/ vegetables \ fungi \ mushrooms / and minerals used in construction.

目前主要经营鲜活水产品，包括(活海鳗\安康鱼\鱼肝\马头鱼\虎鱼\梭子蟹\大闸蟹\鲍鱼等)/蔬菜\菌类\菇类/和建筑用矿石。

In order to get a synthetic evaluation of the nutritional quality between wild and cultured of Portunus trituberculatus, crude protein, crude lipid, ash, amino acids and fatty acids in muscle, hepatopancreas and ovary of Portunus trituberculatus were determined by adopting national standard method.

通过分析比较野生和养殖三疣梭子蟹的肌肉、肝胰腺及生殖腺的营养成分，对其营养价值进行综合评价。

Portunus trituberculatus is a famous aquatic variety in Ningbo city and melanin is often found in storage period. It is a big problem to prohibit melanin phenomenon and prolong storage period of Portunus trituberculatus.

三疣梭子蟹属宁波名特优水产养殖品种，但三疣梭子蟹在保藏加工中容易发生褐变，哪种包装方式可抑制梭子蟹褐变并有效延长产品保鲜期，是一个值得探讨的问题。

The anatomical and histological characteristics and ultrastructure of the midgut gland of larval Portunus trituberculatus w ere studied. The basis of the midgut gland of larval Portunus trituberculatus is between the foregut and midgut.

摘 要 将蚤状幼体I期（Z1）到仔蟹共六期三疣梭子蟹幼体固定，作横切、纵切和平切的连续切片，观察中肠腺的解剖学及组织学特征，并研究其细胞的超微结构。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐