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Assessment of effect of ephemerous fauna and flora on fish output fishing with Fish Aggregating Devices (FAD) in Binh Thuan coastal area

Fishing and protecting juvenile lobster resource in Vietnam

Lobster (Palinurus) is a commercial species of high value. It is an important export product of Vietnam. In the last few years, the rapid development of lobster culture for commercial purpose has placed increased pressure on wild juvenile lobster resource. How to make appropriately exploitation of small and young lobsters for culture while maintaining and regenerating the resource has been a serious question. This article provided some measures to protect the juvenile lobster resource. They include: evaluating the state of juvenile lobster resource to make exploitation and protection plan; establishing community based lobster protected areas; studying on lobster artificial reproduction for culture.

Some measures to prevent and treat fish diseases associated with the lack of nutrients

The article listed the causes and symptoms of some fish diseases related to the lack of vitamin C and some other vitamins, the lack of minerals, and the lack of amino acid. Details on how to prevent and treat these diseases were also provided. For example, measures to prevent the lack of vitamin C include choosing healthy brood stocks; culturing at appropriate density; adding Aqua C Fish, Grow Fish, Aquazyme to fish diet at the rate of 1 kg/5-1 0 tons of fish.

Some results of the recent activities to prevent the introduction of contaminants into shrimp materials

The activities to prevent contaminant introduction into fisheries materials are one of the focus of the fisheries material quality, hygiene, and safety assurance. In order to carry out these activities, the Ministry of Fisheries has promulgated the Decision No. 234/QD-BTS dated March 22nd 2006 adopting the action-plan for quality assurance and veterinary for the fisheries materials in 2006, which includes the "inspection of contaminant reinforcement in shrimp materials in 2006". Three suspects are found through the inspection include impurities injectors, fisheries material collectors and processing factories. The inspection also showed that the people were more aware of the negative impacts caused by impurities, practical knowledge of quality management staff was enhanced and the quality of shrimp materials for processing was improved. Actually, the inspection should be a regular task and it is necessary to make the plan to perform it annually.

Study of techniques of rice-fish culture and the economic effectiveness of this model

In order to take advantage of the fisheries potentials and promote agricultural restructuring in response to improved social-economic life in rural areas, authors of the Research Institute for Aquaculture No. I carried out a study of techniques and economic effectiveness of the model of fish culture in the paddy fields. This study aimed at assessing the economic effectiveness of these models as well as developing the technical process applicable to production. The study was conducted in 2 years (1997-1998) in three areas: Phu Thinh commune (Yen Binh district, Yen Bai province); Dai Bai commune (Gia Luong district, Bac Ninh province) and Yen Chinh commune (Y Yen district, Nam Dinh province). The results showed that rice farming combined with fish culture brought out high economic effectiveness, creating jobs for farmers, raising production and protecting the ecosystem.

Study on chemical and microbial changes in squid muscle during storage in ice

Chemical and microbial changes in squid muscle (Loligo plei) and the efficiency of chemical indices for freshness evaluation were investigated during storage in contact ice (CI) and no contact ice (NC). Psychotropic bacterial counts (PsyC) and non-protein nitrogen (NPN), free amino acids (FAA), trimethylamine (TMA), volatile basic nitrogen (VBN), urea and free tryptophan contents were periodically determined in squid muscle. No difference (P < 0.05) was detected between treatments regarding the increase of psychotropic bacterial counts in squid muscle during storage. TMA and VBN contents in squid muscle increased only after day 9 and no increase was observed in free tryptophan and urea contents in CI treatment. In the NC treatment the contents of VBN and TMA slowly increased during the first days of storage whereas free tryptophan and urea contents markedly increased during the whole storage.