Table of Content

25 February 2013, Volume 35 Issue 1

Previous Issue    Next Issue

Species composition and abundance temporal-spatial distribution of fish egg, larvae and juveniles in Dongshan Bay of Fujian

2013, 35(1):  1-7. 

Asbtract ( )   PDF (4139KB) ( )  

Related Articles | Metrics

Abstract: Based on the surveys data of fish eggs, larvae and juveniles in Dongshan Bay of Fujian in Spring(May, 2008) and Summer(August, 2008) and historical related data, the composition and abundance of temporal-spatial distribution of fish eggs, larvae and juveniles in Dongshan Bay were studied. The results showed that: there were 24 species of fish eggs, larvae and juveniles in survey stations, of which 16 were identified to species, 4 to genus, 4 to family and 2 unidentified. The fish is active in reproductive during spring and summer, while there are plenty eggs and larvae in the bay. The number of fish eggs, larvae and juveniles were mainly consist of migratory economic species, such as Etrumeus teres, Sardinella aurita, Sardinella zunasi, Sillago japonica and Argyrosomus argentatus. Intensive areas of fish eggs in spring is in coastal water of west of Dashuang Island and coastal water of nearest of Ciziwei Nuclear Power Plant, while in Tayu near the bay estuary in summer. In compare with other gulfs in Fujian, Dongshan Bay is an important spawning ground for migratory economic fish on account of its long spawning period. So, its economic value is more important than Quanzhou Bay and Sansha Bay.

Preliminary investigation on the benthos of rocky intertidal zone in Dongdai village of Nanri island

2013, 35(1):  8-14. 

Asbtract ( )   PDF (3795KB) ( )  

Related Articles | Metrics

A survey on two rocky intertidal sections in Dongdai village of Nanri island was carried out from April 2011 to February 2012 . 73 species were identified and analyzed , including 49 species of Mollusca , 8 species of Macroalgae , 7 species of Crustacea , 6 species of Echinodemata , 1 species of Polychata , and 2 others. The average biomass of benthos in the intertidal zone was 1658.01 g/m2 , and the average inhabit density was 23420 ind./m2 . The biodiversity index varies 0.42~1.84 ; the index of Margalef’s species richness varies 0.67~1.71 ; the Pielou’s evenness varies 0.12~0.42 ; and the index of Simpson’s dominance varies 0.13~0.61 . The distribution characteristics was the result of multiple factors , including habitat , seasonality , and human activity and so on .

The Overall Evaluation of Environment Effects of Gaoji Seawall around East and West Sea Area of Xiamen

2013, 35(1):  15-21. 

Asbtract ( )   PDF (3875KB) ( )  

Related Articles | Metrics

Abstract:The paper analyzes the status quo of this sea area through the ocean environment monitor materials of Xiamen west and east sea area during July the inter-tide period in 2008 and conducts comprehensive evaluation and analysis on the ocean environment by the way of BP artificial neurology network. The result shows that the overall condition of sea water quality around east-west sea area, Tongan Bay, south-west sea area, except that inorganic nitrogen and phosphate (exceptions) are over proof. The other monitor index meets the corresponding standards. The comprehensive evaluation analysis shows that the overall environment difference of water quality on both sides of Xiamen Gaoji seawall is obvious. The water quality of west sea area is stable. The difference between big and small tide of Tongan Bay is huge. After the bank is broken, the tendency towards stable west sea area environment is bound to be destroyed. It is suggested that there should be strengthened measure on the monitor of pollutant discharge around Tongan Bay and sensitive creature protection at the beginning of the seawall break-up.

The sterilization of seawater treatment by the little electrolysis technique of the nanocatalyst and its adaptive research of grouper

2013, 35(1):  22-26. 

Asbtract ( )   PDF (3424KB) ( )  

Related Articles | Metrics

Abstract:The controlling of water quality is a key factor for aquatic production. In recent years, chemical and physical water-treatment methods have been used in aquatic species and aquaculture production, which has a certain effect in improving the growing environment of the aquaculture. But there are still kinds of shortages existed. In this paper, seawater sterilization was studied by the little electrolysis technique of the nanocatalyst, which expect to ascertain the minimum value of completely sterilization. And tolerance range of free chlorine in the aquaculture water was studied by different level of treatment intensity of this technology. The result showed that when the treatment intensity was 1.06 W·h/t, the sterilizing rate could be 100%. And the cost was 0.00053yuan per one ton seawater. The highest tolerance intensity for the grouper fry was 4.08 W·h/t. And under this intensity, It could reach the best effect of sterilization and continuous bacteriostatic. And this intensity could be used in practical production of offspring seed. Using the little electrolysis technique of the nanocatalyst to produce the free chlorine, which can disinfect pathogenic organisms and further to purify water, and expect to suppress the occurrence of pathogenic diseases in the end. Finally, the promotion of the little electrolysis technique of the nanocatalyst could have a certain value and environmental effect in aquaculture.

Inoic induces settlement and metamorphosis in Portuguese oyster (Crassostrea angulata) larvae

2013, 35(1):  27-31. 

Asbtract ( )   PDF (3166KB) ( )  

Related Articles | Metrics

Portuguese oyster larvae were exposed to solutions of KCl、CaCl2、MgCl2、NH4Cl at various concentrations. The result is showed below. At the beginning of the test, K+ and NH4+ induced larvae settlement behavior. After a week, except Mg2+ and NH4+, under the concentration of 10mM,20mM, K+ and 10mM-25mM, Ca2+ both induced larvae settlement and metamorphosis; NH4+ caused high mortality. This indicated that in commercial breeding of Portuguese oyster, KCl、CaCl2 may be the potential chemical cues.

The application of enzymatic in squid liver oil extraction

wu chengye

2013, 35(1):  32-39. 

Asbtract ( )   PDF (4419KB) ( )  

Related Articles | Metrics

Squid liver was the raw material in this work, AS.1389 neutral protease was used to extract fish oil, extraction rate was choose as index, the best enzymatic technology was confirmed by single factors and surface response tests. And the fish oil extraction ratio, oil quality and fatty acid composition were system compared which was extracted by enzymatic and water. The result showed that the optimum condition of enzymatic technology was follows：liquid ratio was 1:1, pH was 6, the quantity of enzyme was 1340 U/g , temperature was 55℃ and hour was 4 h; Compared with water extraction, the enzymatic oil are higher extraction rate, lower peroxide value, better oil quality.

Optimization of testing conditions for determinating sulfonamides residues in aquatic products by post-column derivation high performance liquid chromatography

Shui-Fen TANG

2013, 35(1):  40-46. 

Asbtract ( )   PDF (4005KB) ( )  

Related Articles | Metrics

The testing conditions for determinating sulfonamides residues was optimized, base on the standard method of determinating eight sulfonamides in aquatic products by post-column derivatization high performance liquid chromatography (HPLC) method. In the optimized conditions, eight sulfonamides (sulfadiazine, sulfathiazole, sulfamerazine, sulfamethazine, sulfamethoxazole, sulfamethoxypyridazine, sulfisoxazole, sulfaquinoxaline) residues in aquatic products were separated and detected. The calibration curves were linear in a concentration range of 0.025～0.5μg/ml for sulfadiazine, sulfathiazole, sulfamerazine, sulfamethazine; 0.05～1.0μg/ml for sulfamethoxazole, sulfamethoxypyridazine, sulfisoxazole and 0.1～2.0μg/ml for sulfaquinoxaline, with r > 0.999. The average recoveries were 84.2%～109% and the relative standard deviation was in the range of 1.64%～10.6% for spiked weever sample with 5μg/kg～100μg/kg of sulfonamides.

Study on ecological breeding technique of Megalonibea fusca in earth pond

2013, 35(1):  47-52. 

Asbtract ( )   PDF (4377KB) ( )  

Related Articles | Metrics

Abstract: The breeding of Megalonibea fusca in earth pond was adopted the combining method of the indoor high-density breeding first and the cultivation in earth pond afterwards. When the young hatch was cultivated to the juvenile stage in the room, the fish paste was fertilized for bait. After that, fry in earth ponds was fed with fish paste all the time. The four ponds with a total area of 2.2666667ha bred 5.3 × 105 juveniles which the body length ranged from 9.9 mm to12.6mm. In autumn, the temperature of pond water ranged form 23 to 18.4 ℃, salinity of 13～25, pH 8.3～8.8. After 50 days, 2.868 x 105 fry were harvested with overall length of 35～69mm and average length of 48 mm, while the survival rate was 54.1%. Using the fish paste, the water was clear, green and stable, the bait food was rich, and the survival rate of larvae with large size could improve.

Studies on angelfish scale-breeding technology

2013, 35(1):  53-57. 

Asbtract ( )   PDF (3047KB) ( )  

Related Articles | Metrics

This paper presents the technical research results of large-scale breeding of angelfish in Xiamen from 2005 to 2006, and described the process of scale breeding, The experiment introduced a total of 1000 angelfish parent fish with the production amount of 38,400 fertilized egg, 34,600 hatched larvae, and about 23,300 young fish with the total length of more than 1.5cm. The fertilization rate was 89.9%, the hatching rate was 91.9%, and the juvenile survival rate was 74.7%.

Discussion on the Practicability of Setting Frozen Surimi Sector Standard

2013, 35(1):  58-63. 

Asbtract ( )   PDF (4173KB) ( )  

Related Articles | Metrics

The urgency and necessity of setting frozen surimi sector standard are analyzed based on the current development of frozen surimi in this summary, through different light such as the standardization system establishment of aquatic products processing, reducing trade disputes, the protection of fishery resources, the construction industrial organization and discipline, cultivating the large-scale enterprises and so on. In order to get a viable sector standard of frozen surimi, the practicability is described and the suggestions are given according to related standards, which contain the using requirements of raw materials, safety index, physicochemical indexes, classification sensory evaluation and other aspects of frozen surimi. So the surimi industry will develop healthily and rapidly.

The comparison of agarose different extraction methods and modification research

2013, 35(1):  73-77. 

Asbtract ( )   PDF (3702KB) ( )  

Related Articles | Metrics

This paper reviews the comparison of different agarose extraction methods, mainly in principle, operation process and quality indicators. The results indicate that the EDTA-Na2 method and the DEAE cellulose method is more well than other extraction methods. It also points out the problems existing in the extraction process. This paper introduces two common agarose modified product too, mainly introduces the modification of the product principle and extraction method and so on, so as to further study the derivatives of agarose providing theoretical supports.

Research Progress of the Fatty Acid in the Marine Microalgae

Lin WuJie

2013, 35(1):  78-82. 

Asbtract ( )   PDF (3976KB) ( )  

Related Articles | Metrics

Abstract: Arachidonic acid，Eicosapentaenoic acid and Docosahexaenoic acid are the essential polyunsaturated fatcyacigs of human and other animal. This paper reviews the influence of environmental impact factor (temperature, light radiation, chemical composition of culture solution, ventilation volume, methods of storage and culture, and so on) on the content of PUFAs in the marine microalgae, to provide a theoretical reference for the follow-up researcher. Producing the PUFA by the ocean microalgae has great advantage compared to extracting the PUFA directly from the fish. The core problem of microalgae industry is developping the efficient and cheap photo-bioreactor.