Austriella corrugata is a relatively large bivalve mollusc species, living in the low tide mangrove forest with mostly muddy and sandy bottom. Austriella corrugata is delicious and rich in nutrients; brings very high economic value; is popular and is a specialty of coastal areas of Quang Ninh. At present, the supply of Austriella corrugata at the market is from natural exploitation. As there is increasingly high demand for Austriella corrugate, natural Austriella corrugata is exploited more and more, resulting in increasingly exhausted and severely declining resources. Therefore, it is necessary to study and master the biological and reproductive characteristics and living conditions of the species, in order to provide the scientific basis for the protection and development of resources and the production of the breeding, gradually changing from natural exploitation into production, raising incomes for coastal fishermen, and at the same time diversifying valuable livestock breeds and preserving biodiversity.
Austriella corrugate and its living environment
In realization of the memorandum of understanding on promoting scientific and technological cooperation between Quang Ninh province and the Vietnam Academy of Science and Technology, between 2015 and 2017, the Vietnam Academy of Science and Technology and the Quang Ninh provincial People's Committee assigned the Institute of Marine Environment and Resources to chair and Dr. Nguyen Xuan Thanh to be the head of the scientific research and technological development “Study on Austriella corrugata production technology suitable for environmental conditions in Quang Ninh province”. The task consists of two components:
Component 1: "Study on the Reproductive Biological Characteristics of Austriella corrugata for preserving and developing Austriella corrugata in Quang Ninh province" with the Vietnam Academy of Science and Technology’s assessment of content, approval, funding and acceptance.
Component 2: "Study on technology for producing breeding Austriella corrugate suitable for ecological environment in Quang Ninh province" with Quang Ninh province’s assessment of content, adoption, funding and acceptance.
After three years of research, with support and care from the management agencies and households involved in the research, the project has completed its objectives, content and products.
Research results of Component 1: Assessing the current status of Austriella corrugate resources in Quang Ninh (distribution density, biomass, current reserves, exploitation output); Developing a diagram on the distribution of Austriella corrugate resources in some coastal tidal areas of Quang Ninh province; Identify the causes affecting Austriella corrugate resources. Assessing the conservation status of Austriella corrugate resources in Quang Ninh; Identifying reproductive biological characteristics (gonadal morphology and development, gonadal growth index, reproductive season, sex structures in populations, first sexual gonadal growth size, reproductive strength, and stages of developmental of Austriella corrugate); Identifying Austriella corrugate’s typical living environment in coastal tidal areas in Quang Ninh province; Successfully implementing the model for monitoring Austriella corrugate resources, making a practical basis for proposing some measures to conserve and restore Austriella corrugate resources.
Component 1 was evaluated as excellent result by the testing council on December 26, 2017.
Research results of Component 2: Producing 1,362,000 level 1 breeding (1 - 3 mm), more than 56,000 level 2 Austriella corrugate breeding, sized 7 - 10 mm and 4,982 Austriella corrugate sized 26 - 34 mm. The technical process of producing Austriella corrugate breeding which suits ecological conditions of Quang Ninh province was assessed and issued at Decision 182 /QD-SNN & PTNT dated March 6, 2017 by the provincial Department of Agriculture and Rural Development. The process was registered as a useful solution by the National Office of Intellectual Property of Vietnam at Decision 43748/QD - SHTT dated June 30, 2017. The technical process of producing breeding Austriella corrugate and those for food in Quang Ninh province’s natural condition was assessed and issued by the Quang Ninh provincial Department of Agriculture and Rural Development at Decision 689/QD-SNN&PTNT dated June 30, 2017.
Component 2 has been evaluated as excellent result by the testing council on October 13, 2017.
Austriella corrugate breeding level II and Austriella corrugate product after five months trial production
In addition, the component supported the training of 2 masters and 3 aquaculture engineers; published 4 articles in specialized scientific journals.
These are the initial findings of the study on Austriella corrugate. Scientists from the Institute of Marine Resources and Environment suggested that further research and completion of Austriella corrugate breeding and Austriella corrugate production is needed to make the production effective, expanded and developed. Meanwhile, it is necessary to carry out detailed planning and regional planning on preservation and production of Austriella corrugate in Quang Ninh province, in order to protect and develop Austriella corrugate resources and ensure biodiversity.
Translated by Phuong Huyen
Link to Vietnamese version