Isozymes Analysis of the Golden Cuttlefish Sepia esculenta（Cephalopoda ： Sepiidae）

Thirty-nine isozymes in four tissues (mantle muscle, buccal bulb muscle, eye and liver) of Sepia esculenta were screened for enzymatic analysis using starch gel electrophoretic technique. Eighteen enzymes (G3PDH, LDH, MDH, MEP, IDHP, PGDH, GRS, NP, AAT, CK, AK, EST, ALP, ACP, FBP, MPI, GPI and PGM) show strong activities and good convergence in zymogram. They are proved to be suitable genetic markers in Sepia esculenta. Among the tissues used, mantle muscle is the best for electrophoretic analysis of isozymes. Eye and liver are fairly good for some special enzymes, such as LDH, EST, MPI, etc. Twenty-six loci are detected. The proportion of polymorphic loci is 0.115 in the Qingdao sample and 0.153 in the Rizhao sample (P<0.99). The mean values of the observed and expected heterozygosity per locus of Qingdao sample are 0.016 and 0.017, while those of the Rizhao sample are 0.023 and 0.025 respectively.     

Isolation via enrichment and characterization of ten polymorphic microsatellite loci in the cuttlefish, Sepiella maindroni de Rochebruns

Ten novel polymorphic microsatellite loci were developed using an enrichment and colony hybridization protocol and characterized for the cuttlefish, Sepiella maindroni. Polymorphism was explored by using 30 individuals from the coastal waters of Zhanjiang, Guangdong province, China, in December 2007. The number of alleles ranged from 5 to 13. The ranges of observed and expected heterozygosity were from 0.578 9 to 1.000 0 and 0.682 8 to 0.925 7, respectively, and the average polymorphic information content (PIC) was 0.778 5. These microsatellite loci will certainly facilitate the detection of the genetic variation and population structure of S. maindroni.     

我国应发展头足类增养殖

世界海洋头足类动物的总捕获量近几十年来一直在稳步增长。据联合国粮农组织资料统计,1945年全世界海洋头足类动物的总捕获量为500000t左右;捕捞头足类动物的国家为30个;到了1980年世界海洋头足类总产量约达153×10~4t,有75个国家参与了头足类的捕捞生产。 由于对头足类的过度捕捞,一些有重要经济价值的头足类动物,如柔鱼、墨鱼以及章鱼的产量在过去20     

4月墨鱼产卵来

乌贼本名乌鲗,俗称乌贼,又称花枝、墨斗鱼或墨鱼。其实乌贼并不是鱼,属于软体动物门头足纲乌贼目。乌贼是我国四大海产(大黄鱼、小黄鱼、带鱼、乌贼)之一。它不仅能像鱼一样在海中快速游泳,还有一套施放"烟幕"的绝技。乌贼体内有一个墨囊,囊内储藏着能分泌天然墨汁的墨腺,在遇敌害或危急时,墨囊收缩,射出墨汁,自己便     

有问必答

在广东出差的时候吃到了很特别的墨鱼墨炒饭，想问问墨鱼墨真的能吃吗？墨鱼通过喷墨来麻痹猎物，那它的墨对人体会不会有什么毒害呢？