In order to clarify the mitochondrial bar code sequence and taxonomic information of common goby fish in Tianjin coastal marine areas,seven species of goby fish were collected from Tianjin coastal marine areas,identif...In order to clarify the mitochondrial bar code sequence and taxonomic information of common goby fish in Tianjin coastal marine areas,seven species of goby fish were collected from Tianjin coastal marine areas,identified by morphology,and DNA was extracted for amplification and sequencing of mitochondrial COI gene fragments.Phylogenetic analysis and molecular identification software MEGA were used to analyze the sequence characteristics and molecular classification of COI gene fragments of 12 common goby species in Tianjin coastal marine areas.Seven COI gene fragments of Goby were amplified and sequenced,the average GC content was lower than AT content,the base had a bias in the codon position distribution,and the highest GC content was the second base,which was similar to the COI gene base of many fishes.The codon base variation rate was 19.4%,and the ratio of transitions to transversions was 1.3.Phylogenetic distance analysis and phylogenetic tree analysis clarified the phylotaxonomic and evolutionary relationships of 12 major goby species in Tianjin coastal marine areas.Genetic distance indicates that Amblychaeturichthys hexanema and Synechogobius ommaturus are the same species.The high codon variation rate of codon encoding gene in Goby may be related to its good environmental adaptability.展开更多
Sampling survey was carried out on the whole growth cycle(except the ice period from mid-January to mid-march next year)of Porphyra yezoensis breeding in Bohai Bay from late November 2017 to early May 2018,and the mar...Sampling survey was carried out on the whole growth cycle(except the ice period from mid-January to mid-march next year)of Porphyra yezoensis breeding in Bohai Bay from late November 2017 to early May 2018,and the marine environment factor were monitored at the same time.According to the the analysis of the growth condition of P.yezoensis and the environmental factors,the preliminary results confirmed that P.yezoensis could grow well in the Bohai Bay,the water temperature,salinity,pH and Nitrite are important environmental factors to limit its growth,if hanging net curtain in time when environmental conditions in the area is suitable for the growth of P.yezoensis that its growth period will be extended to five months.Survey also found that how to streak through the winter ice period is the key problems to be solved for P.yezoensis cultivation in the area,this study also puts forward two kinds of schemes,which is the effective method remains to be further tested.展开更多
Artificial fish reef is a kind of artificial structure in water,which provides a necessary and safe place for aquatic life such as fish to inhabit,grow,and breed,and creates an environment suitable for fish growth,so ...Artificial fish reef is a kind of artificial structure in water,which provides a necessary and safe place for aquatic life such as fish to inhabit,grow,and breed,and creates an environment suitable for fish growth,so as to protect and multiply fishery resources.In a large time scale,the physical process of sea area can deeply affect the chemical process and biological process,so the structure characteristics of artificial reef are the key factors affecting the flow field effect around the reef.In this study,through the hydrodynamic experiments of four kinds of reef models,including big windows box reef,big and small windows box reef,"(卐)"shaped reef and double-layer shellfish breeding reef,the influence of single reef structure on the flow field effect is analyzed,and the force conditions of different reefs under the same incoming current velocity are obtained.According to the simulation results,the safety research and calculation of five kinds of reef models are carried out,and the volumes of vortex area and upwelling area behind four kinds of reef are obtained.Using hydrodynamic model to simulate the flow field effect of reef area,optimizing the reef structure design,improving the maximum biological trapping and proliferation effect of reef,can provide theoretical guidance and scientific and technological support for the construction of reef area.展开更多
Under the background of a new round of transformation and upgrading of the marine fishery industrial structure and the"speed up and upgrading"of the national marine ranching,this paper uses the method of com...Under the background of a new round of transformation and upgrading of the marine fishery industrial structure and the"speed up and upgrading"of the national marine ranching,this paper uses the method of combining practical experience,literature review,and field research to describe the development of marine ranching at home and abroad,and summarizes the practice process and achievements of Tianjin marine ranch:one national and two provincial marine ranch demonstration areas,16 ecotype reef areas,one seafood demonstration area,and one floating fish reef demonstration area were built,with a total scale of 26.9 km^(2),and a total of 134900 m^(2) fish reefs.This paper emphatically analyzed the construction experience and characteristics of the Tianjin Dashentang Marine Ranch demonstration area.Combined with the development orientation and objectives of Tianjin marine ranch,it is proposed to unify understanding,perfect development concept,accelerate the pace of scientific research,and adhere to ecological priority.In future,the construction of Tianjin marine ranch should encourage innovation to achieve leap-forward development,explore a new model of fishery development based on the'Economic Union',with'marine ranching-ecological farming-leisure tourism-featured products'as the main body.Based on relevant experience at home and abroad,the industrialization model of marine ranch with Tianjin characteristics should be established,which aims to provide strong support for the construction of"blue granary"in Tianjin,the implementation of Tianjin's coastal ranching strategy,and the promotion of Tianjin coastal ecosystem reconstruction and fishery resource recovery.展开更多
基金supported by the National Key R&D Plan(2019YFD0902102 and 2019YFE01223000)Innovation Team Project of Marine Aquaculture Modern Agricultural Industry System in Tianjin City(ITTMRS2021005).
文摘In order to clarify the mitochondrial bar code sequence and taxonomic information of common goby fish in Tianjin coastal marine areas,seven species of goby fish were collected from Tianjin coastal marine areas,identified by morphology,and DNA was extracted for amplification and sequencing of mitochondrial COI gene fragments.Phylogenetic analysis and molecular identification software MEGA were used to analyze the sequence characteristics and molecular classification of COI gene fragments of 12 common goby species in Tianjin coastal marine areas.Seven COI gene fragments of Goby were amplified and sequenced,the average GC content was lower than AT content,the base had a bias in the codon position distribution,and the highest GC content was the second base,which was similar to the COI gene base of many fishes.The codon base variation rate was 19.4%,and the ratio of transitions to transversions was 1.3.Phylogenetic distance analysis and phylogenetic tree analysis clarified the phylotaxonomic and evolutionary relationships of 12 major goby species in Tianjin coastal marine areas.Genetic distance indicates that Amblychaeturichthys hexanema and Synechogobius ommaturus are the same species.The high codon variation rate of codon encoding gene in Goby may be related to its good environmental adaptability.
文摘Sampling survey was carried out on the whole growth cycle(except the ice period from mid-January to mid-march next year)of Porphyra yezoensis breeding in Bohai Bay from late November 2017 to early May 2018,and the marine environment factor were monitored at the same time.According to the the analysis of the growth condition of P.yezoensis and the environmental factors,the preliminary results confirmed that P.yezoensis could grow well in the Bohai Bay,the water temperature,salinity,pH and Nitrite are important environmental factors to limit its growth,if hanging net curtain in time when environmental conditions in the area is suitable for the growth of P.yezoensis that its growth period will be extended to five months.Survey also found that how to streak through the winter ice period is the key problems to be solved for P.yezoensis cultivation in the area,this study also puts forward two kinds of schemes,which is the effective method remains to be further tested.
基金supported by the National Key R&D Plan(No.2023YFD2401104)Tianjin Agricultural Development Service Center Science and Technology Innovation Project for Youth(No.ZXKJ202429 and No.ZXKJ202454).
文摘Artificial fish reef is a kind of artificial structure in water,which provides a necessary and safe place for aquatic life such as fish to inhabit,grow,and breed,and creates an environment suitable for fish growth,so as to protect and multiply fishery resources.In a large time scale,the physical process of sea area can deeply affect the chemical process and biological process,so the structure characteristics of artificial reef are the key factors affecting the flow field effect around the reef.In this study,through the hydrodynamic experiments of four kinds of reef models,including big windows box reef,big and small windows box reef,"(卐)"shaped reef and double-layer shellfish breeding reef,the influence of single reef structure on the flow field effect is analyzed,and the force conditions of different reefs under the same incoming current velocity are obtained.According to the simulation results,the safety research and calculation of five kinds of reef models are carried out,and the volumes of vortex area and upwelling area behind four kinds of reef are obtained.Using hydrodynamic model to simulate the flow field effect of reef area,optimizing the reef structure design,improving the maximum biological trapping and proliferation effect of reef,can provide theoretical guidance and scientific and technological support for the construction of reef area.
基金supported by the National Key R&D Plan(2019YFE0122300)Tianjin City Science and Technology Major Special Project and Project(18ZXRHSF00270)+1 种基金Tianjin Agricultural Development Service Center youth science and technology innovation project(ZXKJ202429)Tianjin City Mariculture Modern Agricultural Industry Technology System Innovation Team Project(ITTMRS2023005).
文摘Under the background of a new round of transformation and upgrading of the marine fishery industrial structure and the"speed up and upgrading"of the national marine ranching,this paper uses the method of combining practical experience,literature review,and field research to describe the development of marine ranching at home and abroad,and summarizes the practice process and achievements of Tianjin marine ranch:one national and two provincial marine ranch demonstration areas,16 ecotype reef areas,one seafood demonstration area,and one floating fish reef demonstration area were built,with a total scale of 26.9 km^(2),and a total of 134900 m^(2) fish reefs.This paper emphatically analyzed the construction experience and characteristics of the Tianjin Dashentang Marine Ranch demonstration area.Combined with the development orientation and objectives of Tianjin marine ranch,it is proposed to unify understanding,perfect development concept,accelerate the pace of scientific research,and adhere to ecological priority.In future,the construction of Tianjin marine ranch should encourage innovation to achieve leap-forward development,explore a new model of fishery development based on the'Economic Union',with'marine ranching-ecological farming-leisure tourism-featured products'as the main body.Based on relevant experience at home and abroad,the industrialization model of marine ranch with Tianjin characteristics should be established,which aims to provide strong support for the construction of"blue granary"in Tianjin,the implementation of Tianjin's coastal ranching strategy,and the promotion of Tianjin coastal ecosystem reconstruction and fishery resource recovery.
