CURRENT STATE AND DEVELOPMENT PERSPECTIVES OF THE CASPIAN SPRAT FISHERIES

2018 ◽  
pp. 69-75
Author(s):  
Tatiana Vasilievna Pomogaeva ◽  
Aliya Ahmetovna Aseinova ◽  
Yuriy Aleksandrovich Paritskiy ◽  
Vjacheslav Petrovich Razinkov
Keyword(s):  
Food Item ◽  
Growth Potential ◽  
North West ◽  
Marine Fishery ◽  
The North ◽  
Current State ◽  
West Part ◽  
Eggs And Larvae ◽  
Intensive Growth

The article presents annual statistical data of the Caspian Research Institute of Fishery. There has been kept track of the long term dynamics of the stocks of three species of Caspian sprat (anchovy, big-eyed kilka, sprat) and investigated a process of substituting a food item of sprats Eurytemora grimmi to a small-celled copepod species Acartia tonsa Dana. According to the research results, there has been determined growth potential of stocks of each species. Ctenophoran-Mnemiopsis has an adverse effect on sprat population by eating fish eggs and larvae. Ctenophoram - Mnemiopsis is a nutritional competitor to the full-grown fishes. The article gives recommendations on reclamation of stocks of the most perspective species - common sprat, whose biological characteristics helped not to suffer during Ctenophoram outburst and to increase its population during change of the main food item. Hydroacoustic survey data prove the intensive growth of common sprat biomass in the north-west part of the Middle Caspian. According to the results of the research it may be concluded that to realize the volumes of recommended sprat catch it is necessary to organize the marine fishery of common sprat at the Russian Middle Caspian shelf.

scholarly journals AIS and VBD Data Fusion for Marine Fishing Intensity Mapping and Analysis in the Northern Part of the South China Sea

2021 ◽  
Vol 10 (5) ◽  
pp. 277
Author(s):  
Xiaoen Li ◽  
Yang Xiao ◽  
Fenzhen Su ◽  
Wenzhou Wu ◽  
Liang Zhou
Keyword(s):  
South China Sea ◽  
South China ◽  
Coastal Area ◽  
Data Sources ◽  
Intensity Data ◽  
Marine Fishery ◽  
Fishing Vessels ◽  
Intensity Information ◽  
Marine Fishery Resources ◽  
Marine Fishing

For the sustainable development of marine fishery resources, it is essential to comprehensively, accurately, and objectively obtain the spatial characteristics and evolution law of fishing intensity. However, previous studies have focused more on the use of single data sources, such as AIS (Automatic Information System) and VBD (VIIRS boat detection), to obtain fishing intensity information and, as such, have encountered some problems, such as insufficient comprehensive data coverage for ships, non-uniform spatial distribution of data signal acquisition, and insufficient accuracy in obtaining fishing intensity information. The development of big data and remote sensing Earth observation technology has provided abundant data sources and technical support for the acquisition of fishing intensity data for marine fisheries. Based on this situation, this paper proposes a framework that integrates the data of fishing vessels from two sources (AIS, with high space-time granularity, and VBD, with short revisit cycle and high sensitivity), in order to obtain such information based on closely matching and fusing the vector point data of ship positions. With the help of this framework and the strategy of indirectly representing fishing intensity by data point density after fusion, the spatial characteristics and rules of fishing intensity in typical seasons (February, April, September, and November) in the northern South China Sea in 2018 were systematically analyzed and investigated. The results revealed the following: (1) Matching and fusing AIS and VBD data can provide a better perspective to produce robust and accurate marine fishery intensity data. The two types of data have a low proximity match rate (approximately 1.89% and 6.73% of their respective inputs) and the matching success for fishing vessels in the data was 49.42%. (2) Single AIS data can be used for nearshore (50 to 70 km) marine fishery analysis research, while VBD data reflect the objective marine fishing in space, showing obvious complementarity with AIS. (3) The fishing intensity grid data obtained from the integrated data show that high-intensity fishing in the study area was concentrated in the coastal area of Maoming City, Guangdong (0–50 km); the coastal area of Guangxi Beihai (10–70 km); around Hainan Island in Zhangzhou (10–30 km); and the Sanya nearshore area (0–50 km). However, it did not decay with increasing offshore distance, such as at the Trans-Vietnamese boundary in the Beibu Gulf, near the China–Vietnam Common Fisheries Area (50 km) and high-intensity fishing areas. (4) The obtained fishing intensity data (AIS, VBD, and AIS + VBD) were quantitatively analyzed, showing that the CV (Coefficient of Variation) of the average for each month (after fusing the two types of data) was 0.995, indicating that the distribution of the combined data was better than that before fusion (before fusion: AIS = 0.879, VBD = 1.642). Therefore, the integration of AIS and VBD can meet the need for a more effective, comprehensive, and accurate fishing intensity analysis in marine fishery resources.

scholarly journals The missing middle: Central Arctic Ocean gaps in fishery research and science coordination

Marine Policy ◽  
2017 ◽  
Vol 85 ◽  
pp. 79-86 ◽  
Author(s):  
T.I. Van Pelt ◽  
H.P. Huntington ◽  
O.V. Romanenko ◽  
F.J. Mueter
Keyword(s):  
Arctic Ocean ◽  
Central Arctic Ocean ◽  
Fishery Research ◽  
Missing Middle

scholarly journals Characterization of small-scale fisheries in the Camamu-Almada basin, southeast state of Bahia, Brazil

2008 ◽  
Vol 68 (4) ◽  
pp. 711-719 ◽  
Author(s):  
TCM. Souza ◽  
M. Petrere-Jr
Keyword(s):  
Low Income ◽  
Small Scale ◽  
Income Generation ◽  
Target Species ◽  
Market Prices ◽  
Marine Fishery ◽  
Small Scale Fisheries ◽  
Main Factor ◽  
Stock Abundance

In the Camamu-Almada basin, marine fishery is exclusively small-scale, with several structural deficiencies such as boats with low or absent navigational technology, lack of credit and low income. Local fishers complain that shrimp and lobster trawling fishing is the main factor responsible for low stock abundance, but they still persist in these activities as these two species command the highest market prices. So they feel that the target species are already over-fished. We suggest that proper management action, alternative ways of income generation and the payment of job insurance would help to mitigate the problem.

scholarly journals Analysis on the Development Trend of Marine Fishery Governance

2020 ◽  
Vol 9 (7) ◽  
pp. 32
Author(s):  
Zhi Chen ◽  
Chaojie Yang ◽  
Wubo Wan ◽  
Yongzhen Liu ◽  
Zhenbo Chen ◽  
...  
Keyword(s):  
Sustainable Development ◽  
Development Trend ◽  
Marine Ecology ◽  
Ecological Environment ◽  
Marine Fisheries ◽  
The Sustainable Development ◽  
Marine Fishery ◽  
Marine Economy ◽  
Fishery Governance ◽  
The Development Trend

Marine fishery is an important part of China’s economic development. Marine fishery is not only related to the development of marine economy, but also the marine ecological environment. It is very important to promote the competitiveness of marine fisheries, protect marine ecology, and explore the sustainable development of marine fisheries. In this regard, this article analyzes the development trend of marine fisheries, analyzes the current problems in marine fishery governance, and explores effective countermeasures for the development of marine fishery governance, hoping to provide some ideas for promoting marine fishery governance and enhancing the benefits of marine fishery development.

scholarly journals Study Case: Productivity of Catched Fish in Locations around the Construction of Coal Power Plant, Jepara Indonesia

2021 ◽  
pp. 52-63
Author(s):  
Slamet Isworo ◽  
Slamet Febrianto ◽  
Tosan Aji ◽  
Poerna Sri Oetari ◽  
Ekannisa Jasmiene
Keyword(s):  
Power Plant ◽  
Fish Production ◽  
Catch Per Unit Effort ◽  
Potential Conflict ◽  
Marine Fishery ◽  
Simple Regression Analysis ◽  
Study Case ◽  
The Government ◽  
Descriptive Method

Background and objective: The productivity of fishing in marine waters provides an overview of the level of ability of the fishing gear used by fishermen to obtain optimal fish catches. This study aims to determine the productivity of fishing in locations around the construction of the coal-fired power plant, Jepara Indonesia. Methods: The method used is a descriptive method which is a case study. This research case is about annual marine fishery productivity by calculating Catch Per Unit Effort (CPUE), then predictions are made using simple regression analysis. Results: Based on the results of the study, a positive modeling trend (increase) was obtained for total fishery production, total demersal fishery production, and total pelagic fish production. Conclusion: capture fisheries productivity in Jepara waters is generally quite good and is not affected due to the development of Tanjung Jati coal-fired power plant B-Unit 5 -6. This is because it is not a fishing operation area for fishermen so there is no potential conflict with fishermen. Suggestion: The results of this study can be used by the Government of Jepara Regency in determining sustainable fishing policies and not overfishing

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