Table of Content

25 June 2013, Volume 35 Issue 3

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Preliminary ivestigation of fish resources of the Guilongshan provincial nature reserve, Fujian province, China

2013, 35(3):  167-174. 

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A preliminary investigation of fish composition was performed in the Guilongshan Nature Reserve of Fujian province in July 2012. Nineteen fish species were collected from 6 sites, belonging to 5 orders, 8 families and 16 genera. The largest group of the fish community was from Cypriniformes, representing the typical fauna characteristic of oriental realm. Most species were omnivorous fishes living in the benthic zone of the mountain streams. The community diversity at each site was measured using the Shannon-Weiner index, Pielou evenness index, richness index and similarity analysis. The results showed that community diversity varied among sites. The analysis of relative importance index demonstrated that Zacco platypus, Distoechodon tumirostris and Acrossocheilus parallens were the dominant species among all sampling sites.

Application on ecological fishery of Setting-nets in Shanmei reservoir

Xing-Yong SHUI

2013, 35(3):  175-180. 

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Setting-nets was one of fishing nets,which has been widely used in fishery production in the reservoir. In this paper, 30 setting-nets were flexible installed with a single or 2 ~ 3 cages inverted staggered series by the topography, fish catch and food organism in Shanmei reservoir. There were 529.5 tons of fish catch in 2011,,and the average annual output was 17.65-51.3 tons of single box.376.4 tons of the fish production was caught in the production season which was from May to July, and accounting for annual fish production 71.08%.The new fishing for reservoir characteristics was established in Shanmei reservoir.

The study on adsorptive capability of oyster shell powder adsorbing low concentration of Heavy metal ions in Water

2013, 35(3):  193-202. 

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In order to study the adsorptive capability of oyster shell powder adsorbing low concentration heavy metal ions in water, five kinds of heavy metal ions Cu2+,Zn2+,Pb2+,Cd2+,Cr(Ⅵ)has been added in the water, the influence of adding different amount, adsorption temperature, pH value, adsorption time and initial concentration of solution has been discussed. And it also carried out dynamics research, thermodynamic study and SEM analysis. Results showed that Cu2+,Zn2+,Pb2+ has a good removal capacity, but Cd2+、Cr(Ⅵ) is relatively weak. The adsorption by oyster shell powder is in line with the secondary kinetic equation and the Langmuir isotherm model. The SEM maps indicated that secondary solid was built on the oyster shell powder surface after adsorbing Cu2+,Zn2+,Pb2+ and no obvious phenomena on the surface after adsorbing Cd2+,Cr(Ⅵ).

Studies on the content change of heavy metals in seawater of Minjiang Estuary

2013, 35(3):  203-210. 

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The contents of the heavy metals such as Hg、As、Pb、Cd、Cu、Zn in the seawater near Minjiang Estuary are determined and the distribution law is obtained from 2003 to 2012. Using ARIMA model to forecast the trend of contents within the next two years. The results showed that the contents of Pb, Cd, Cu are relatively stable near Minjiang Estuary since 2003,while the other contents of the heavy metals are steady yearly .The analysis of ARIMA indicated that the contents of heavy metals within the future two years will be close to the average annual contents in 2003～2012。

A preliminary study of nutrients distribution in Pseudosciaena crocea Net-Cage Culture Area of Sandu Bay

2013, 35(3):  211-217. 

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Abstract: We monitored the contents of nutrients in Pseudosciaena crocea Net-Cage Culture Area of Sandu Bay during 2009 to 2011, and assessed the distribution and abundance of nutrients preliminarily. The result indicated that the water quality in cultivation zones of Sandu Bay is superior to the water quality standard (Il kind of GB3097-1997 sea water quality standard). NO3-N is the dominated component of DIN in this area, accounted for 78.08%~88.89% of total DIN. PO4－P may be the critical factor in the growth and reproduce process of phytoplankton, and had a vital influence on the primary productivity of this domain. The contents of nutrients (N, P, Si) present distinct variations between months, years and spaces.

Analysis and evaluation on water quality of main aquaculture area in Xiamen coastal waters

2013, 35(3):  218-225. 

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According to monitoring results on water quality environment of Xiamen coastal aquaculture area from 2010 to 2012, this paper analyzes and evaluates the water quality status in major culture area in Xiamen. The results show that the water environmental quality is generally good. The indicators of pH, DO, BOD5 and COD are basically in compliance with the standard. The water quality in Da-xiao Deng sea area is excellent, while there are varying degrees of eutrophication in Tong’an bay.

Forcast for artificial seeding of Crassostrea angulata in Shenhu Bay of Shishi

Chuan-Fu SONG

2013, 35(3):  226-229. 

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Shenhu Bay in Shishi is one of the the most main seeding and feeding district for Crassostrea angulata in our province. It’s rich in natural oyster seedlings. When the breeding season of the oyster approached every March, gonad maturity and sperm&eggs emission were observed, and water samples were collected by townet. Developmental stage and quantity variety of Oyster’s larva were examined by microscope so that peak time for metamorphosis of ocellus larva were grasped correctly. It was a scientific instruction for the raisers to throw in the beds for collecting oyster larva. From 2010 to 2012, totally 11 times for artificial seeding were developed by our station, and umboveligers & ocellus larva that collected by townet were microscopical examined as 258pic/m3 & 114pic/m3, 218 pic/m3 & 74pic/m3, 56 pic/m3 & 236 pic/m3 on May 18th 2010, May 4th 2011, May 3rd 2012. And peak time for natural oyster seedlings’ attaching was coming later soon. Moreover, it’s concluded by results of microscopical examination and attaching that peak time for natural oyster seedlings’ attaching was about from 5th, May to 25th, May, that means every summer begins was the peak time for oyster seedlings’ attaching.

Analysis of two fishery contamination accidents caused by poultry manure

2013, 35(3):  230-235. 

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Two fishery death accidents happened in Fujian province Minhou county and Fuqing city freshwater fish farms were concluded caused by poultry manure contamination. Through the investigation we found the ammonia, ammonia nitrogen and total coli group were beyond the standard level in the contaminated water. The oxygen consumption substances increased by poultry manure contamination in Minhou county fishery farm. The consumption of oxygen in water caused the fish died for hypoxia. The dissolved oxygen in dead zone is 0.55mg/L to 0.92mg/L. Caused by poultry manure contamination in Fuqing city fishery farm, the amount of phytoplankton rapidly increased from 9.58×107 to 1.05×108cell/L after consuming ammonia nitrogen nutrients. Photosynthesis also produced lager amounts of oxygen in daylight which resulted in super saturation dissolved oxygen （180%~183%）. At the same time released of carbon dioxide also led to pH increase （9.59~9.79）. Furthermore, a large amount of NH4+ in water were transformed into NH3, consequently fish died for the increase of ammonia content. After investigation of these two typical poultry manure contamination in aquaculture water cases, we analyzed the variation of index factors and concluded that the poultry manure contamination could lead to increase of ammonia, ammonia nitrogen and total coli group. The factors causing fish death were lack of oxygen and ammonia poisoning. Recommended strategies for pollution prevention suggested in the paper as well.

Analysis of Current State, Problems and Corresponding Development Policies of Abalone Culture Industry in Fuzhou

2013, 35(3):  236-241. 

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according to statistics, by 2010, our national abalone production reached 5.65×104t, accounting for 86% of world total production, among which 3/4 were produced in Fujian province. In 2011, abalone production in Fuzhou city, Fujian province amounted to 3.15×104t, taking up 52% of the province’s total production. Lianjiang county, known as the “home to Chinese abalone.”, in particular, is the nation-wide top abalone production county in China, Undergoing two decades of development, abalone production industry in Fuzhou has become a pillar mariculture industry with annual production value of 30×108 yuan. In spite of its significant role in accelerating social and economic development in the fishing area, it also confronts several problems and bottlenecks. The corresponding policies are as follows: to strengthen sea area planning and distribution and promote orderly development of abalone industry; to intensify system development for seed industry and speed up introduction and breeding of quality seeds; to take overall prevention and treatment measure to minimize risk of abalone industry; to innovate abalone farming technological pattern so as to increase the overall benefit of abalone industry; to accelerate supportive feed research and development, ensuring supply of abalone feed; to vigorously develop deep-processing to improve additional value of abalone products; to build brand and expand market for the sustained stable development of abalone industry.

The effect of several modification on electroosmosis and freezing point of agarose

wu chengye

2013, 35(3):  242-246. 

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This paper reviews the features and applications of low electroosmosis agarose, low freezing point agarose and agarose chromatography material. And cited several modification methods and modified principle of the products. The paper is aiming to provide reference for modification process and further in-depth study of the agarose.