Allowable Catch Research Articles

Рыбопромысловый потенциал Южного Байкала в аспекте развития туризма и ограничений рыбного промысла

The article considers eco-economic aspects of using the fishing capacity of the basin of South Baikal in the framework of the development of tourism of the coastal territory within Slyudyansky Municipal District of Irkutsk Oblast and within the entire southern Baikal Region. The article proposes to more strongly focus on developing sport and recreational fishing in this most developed area of Lake Baikal.
 The eco-economic and legal analysis carried out by the authors allows them to conclude that the traditional regulation of the stock of omul in Baikal by determining the total allowable catches and quotas is not effective enough, since it has led to the prohibition of not only industrial but also limitation of sport and recreational fishing for omul. At the same time, there is no reliable data that recreational fishing along the southern coast of Baikal is the reason for the decrease in the total stocks of omul in Baikal. On the contrary, the South Baikal fishing area can become the basis for a more dynamic development of the tourism industry in the region, including such types of it as cognitive tourism, ecological tourism and sports and recreational one. Moreover, it is the South Baikal fishing area and the coastal territory of Slyudyansky Municipal District that can become a testing site for developing more optimal (considering the specifics of various areas of Lake Baikal) ecological approaches to the regulation, rational use and reproduction of the stock of omul in Baikal for the purposes of sport and recreational fishing at Lake Baikal, as well as development of an environmentally friendly tourism industry in the region.
 The authors propose to review the strategy of fishery development of the stocks of omul at Lake Baikal and remove restrictions on recreational fishing, accompanying this with organizational and legal measures that allow obtaining reliable statistical data on catches. Precisely in this most economically developed area of Lake Baikal it is advisable to practice the organizational and legal mechanisms for the environmentally friendly development of tourist and recreational activities based on the available water bioresources of the unique lake.

Analysis of Optimal Harvest and Management of Capture Fishery of Lake Ziway, Central Ethiopia

Even if there is fluctuation in fish species diversity and relative abundance of the species, Lake Ziway provides numerous environmental and/or ecosystem services. Despite to its importance, the Lake faces numerous threats because of its public good characteristics. Following the exponentially increased demand for fishes and the resource being public good, magnificent number of individuals are participated in capture fisheries in order to secure their livelihood. Free access to the fisheries, illegal fishing gears and environmental degradation are among the main reasons of decline in fish species and degradation of the Lake. From the current stock assessment survey, the study showed decline in biomass of fish over time. These negative trends in the Lake Ziway fisheries and poor water quality led to loss of livelihoods of many households who are directly or indirectly dependent on the Lake. Therefore, management of Lake Ziway fishery becomes very essential to manage the resource efficiently in a way that maximize fishers present and future benefits otherwise, the fish resource will disappear in the near future. Concerning management practices, most of the fishery regulations in this Lake put emphasis on the restriction of fishing gear, but the application of this instrument with its restrictions is almost zero. Moreover, Individual Transferable Quotas (ITQs) foster greater transparency and accountability for the management and enhancement of fishery resources by quota owners. In this regard, since it generates a sense of ownership and its versatility in providing a stable and productive market, ITQs are more effective than gear restrictions and in fact, it has major social benefits by controlling overharvesting. Due to this, to ensure the nutritional and food security of the country currently and in the near future, there is a need to enforce fishing gear restriction and set ITQs. Furthermore, there must be strong effort on studying the current stock of fish, and numbers of legal and illegal fishers to set Individual Transferable Quotas (ITQs) and Total Allowable Catch (TAC) for sustainable fishery management of Lake Ziway. Keywords: Ziway, capture fisheries, Individual Transferable Quotas, Total Allowable Catch, sustainable fishery management DOI: 10.7176/JESD/12-23-02 Publication date: December 31 st 2021

An Application of the Z-Transform in Extracting the Density Regulation from the Periodic Output of an Age-Structured Population Model

The application of the Z-transform, a manipulation tool from the discrete signal processing (DSP) toolbox, on an ecological model was motivated by the mathematical similarities between an age-structured fish population model with a non linear density regulation and a linear time invariant (LTI) control system. Both models include a switching mechanism in regulating stock/signal throughput in accordance with a given density limitation/set value and both models can be expressed in terms of a negative feedback loop difference equations (Getz & Haight,1989; °Astr¨om & Murray, 2008). In the fish model, the switching mechanism is a density regulated stock-recruitment (SR) function which models the strategies implemented by the population in keeping the vulnerable egg-larvaejuvenile densities within an environmental limitation thereof (Subbey et al, 2014). A switching mechanism is also present in control engineering, for example, in the mechanism associated with cruise control in cars which keeps traveling speed close to a chosen set value midst varying weather and road conditions (Antsaklis and Gao, 2005). In both cases, the choosing of the control action and the tuning of its parameters requires careful consideration to avoid failures such as incorrectly timed switching actions in a control plant (see Kuphaldt (2019)) and errors in estimating total allowable catch (TAC) in the fishing industry (see Borlestean et al (2015), Skagen et al (2013) and Taboadai and R. Anadn (2016)). The Z-transform has proven itself useful in tuning LTI controlmodels for a desired control action (see Orfanidis, (2010) and Smith, (1999)) and it is on this account that its application was extended to the ecological model in pursuit of a more efficient way of estimating SR parameters to simulate an already existing output. It was however found that it could not be used for parameter tuning but rather for the extraction of the SR component hidden in the output together with components resulting from the age structure itself. Such an extraction can greatly assist in the mathematical identification of the SR, reducing the complexity of its choosing as there are many different types used in the fishing industry such as the classic Beverton-Holt model, the Ricker model and Shepherd model (Myers, 2001; Iles, 1994; Shepherd, 1982). It can also be used to monitor changes in the SR over time which can indicate the presence of strategy evolution (Apaloo et al, 2009; Br¨annstr¨om et al, 2013). In 1998 Schoombie and Getz investigated the latter by subjecting the Shepherd SR to strategy optimization with regards to a parameter associated with population interventions in regulating recruitment throughput and it is because of this versatility that the Shepherd SR is chosen for the intended extraction. In true control style, Simulink, a graphic environment for designing control simulations, is used to visualize the production of the output as well as the extraction of the SR from it. This paper showcases the versatility of the Z transform and the possibilities and unexpected finds when applied to similar systems designed to regulate signals or, in this case, recruitment densities.

Multi-species assessment and management implications of lobster fisheries in Gunungkidul waters, Indonesia

Three species of lobsters including Panulirus penicillatus, P. homarus and P. longipes are harvested simultaneously by traps in Gunungkidul waters, Indonesia. The management restriction for only one species of lobster can be dangerous for the other species. A multi-species assessment was conducted to investigate the stock status indicators and to develop the management tools. Time-series catch and effort data for the three aggregated lobsters were used to apply a surplus production model to forecast the stock rebuilding scenarios. The recent fishing effort was higher than the effort at maximum sustainable yield and the recent aggregated stock biomass was less than the optimal biomass. Growth overfishing and recruitment overfishing were detected based on the multi-species yield per recruit and the spawning potential ratio analysis. In this multi-species fishery, P. penicillatus has the lowest spawning stock biomass, thus it could be considered as the weakest stock to develop the lobster fishery management in Gunungkidul waters. For the sustainability of multi-species fishery in Gunungkidul waters, a 29% reduction of recent effort, applying the TAC (Total allowable catch) to be 26,145 kg and setting the optimal mesh size should be taken into consideration as rational fisheries management tools.

The potential of the spiny lobster fishery in Aceh waters: A short review

The western-southern and northern coastal waters of Aceh are the potential fishing areas of spiny lobster, which faces the Indian Ocean and the Andaman Sea. Fishing gears that are widely used are lobster gill nets and hand-picking with compressors. In Indonesia, seven species of spiny lobsters are caught in these waters, including Panulirus homarus, P. penicillatus, P. versicolor, P. ornatus, P. polyphagus, P. longipes longipes, and P. longipes femoristiga. The habitat for spiny lobsters is spread from coral reefs, rock, sand, and muddy sand. Panulirus homarus is the most frequently caught species in these waters, followed by P. penicillatus and P. longipes. Panulirus homarus is mainly caught during the dry season (southwest wind) and high waves (May to July), where other lobster species experience a significant decrease in the catch. The stock of spiny lobster in Fisheries Management Area (FMA) 572 (including Aceh coastal waters) has been in an overfishing condition since 2008. Maximum sustainable yield (MSY) of spiny lobster in Aceh coastal waters part of Malacca Strait (FMA 571) is 188.60 tons.yr−1 with a total allowable catch (TAC) of 151.10 tons. yr−1. Furthermore, the MSY for Aceh coastal waters part of Indian Ocean is 292.09 tons.yr−1 with a TAC of 233.92 tons.yr−1. Spiny lobster fishing in Aceh coastal waters must ensure its use in the future, both ecologically, socially, and economically.

Sustainability and wealth creation, but no consensus: Recent decades in Iceland’s ITQ-managed fisheries

This paper describes the main developments, issues, and disputes surrounding Iceland’s fisheries and the individual transferable quota (ITQ) system governing them. The path to the ITQ system in Iceland started in 1979 in some pelagic fisheries. A substantial step was made in demersal fisheries when moving toward an individual vessel quota (IVQ) system in 1984. The biggest milestone in management was reached in 1990 when a comprehensive ITQ system was introduced that covered most Icelandic fisheries. Overfishing was a problem in the early days of the ITQ system. The path to sustainable fisheries was long and gradual, and now, most fish stocks are sustainably managed. There is clear evidence that the current fishing rights holders in Icelandic fisheries have demonstrated environmental stewardship because they have not opposed reductions in the total allowable catch (TAC) of important species. The economic performance of the industry has improved, and both the fishing and processing parts of Iceland’s fisheries are now very profitable, and the fishing component is paying significant resource rent taxes. The industry has changed considerably, fishing rights have been consolidated, primary fish markets have been liberalized, and vertically integrated firms dominate the Icelandic fishing industry. Fishing rights (permanent quota shares) are very valuable, so entering the industry for new participants is difficult. The Icelandic ITQ system is now and has always been very controversial and under heavy political debate and scrutiny.

Management of sustainable fisheries and utilization status of red snapper (Lutjanus spp.) using handline landed in archipelagic fishing port of Brondong

Fish resources of the study were landed in the Archipelagic Fishing Port of Brondong and it is dominated by the demersal fish (bottom). The red snapper (Lutjanus spp.) is one of demersal fish that is found in the Archipelagic Fishing port of Brondong. There is a catch on the red snapper (Lutjanus spp.) that takes place continuously without good management. This condition can impact to the decline or fullness of the number of its population, it is necessary to have a review to suspect the potential of sustainable catch and the number of total allowable catch, and the number of total allowable efforts in the management of the sustainable fishing commodity of red snapper (Lutjanus spp.). The data analysis method used is the production surplus model. The result of this research showed that the potential for maximum sustainable catch (YMSY) is 102.88 tons/year and total allowable catch (TAC) is 82.31 tons/year. Maximum sustainable effort (fMSY) is 709 trips/year and total allowable effort is 242 trips/year. utilization rate is 75% where condition in status fully exploited.

Sustainable potential analysis of Indian mackerel (rastrelliger kanagurta) resource in East Coast waters of Aceh Province

Indian mackerel (Rastrelliger kanagurta) was among the most commonly caught fish in Aceh east coast waters. Sustainability of Indian mackerel (R. kanagurta) must be maintained because of its important role in improving the fisheries economy in Aceh Province. This research was conducted in east coast waters of Aceh Province from January 2019-to April 2019. Purposes of this research were to describe the general condition and to find out the sustainable management scenario of the Indian mackerel (R. kanagurta) fisheries in Aceh east coast waters Province. The method used was quantitative descriptive. Data collection was done by conducting interview and literature studies. The material used was on Aceh Province capture fisheries statistical data (2003–2017) obtained from Marine and Fisheries Office Aceh Province. Data were analyzed by applying surplus production and dynamic system modelling. Results indicated that utilization rate value (URy) of the fish stock was 69%. Hence the utilization status of the Indian mackerel (R. kanagurta) resource was moderate exploited. Based on biomass in 2017, the sustainable management scenario of the fish for the next eight years (2018-2025) would achieve the highest allocation of fishing effort equal to total allowable catch (TAC) as big as 163%. Therefore, implementation of fishing efforts equivalent to the TAC regarding the biomass sustainability can be maintained until year 2025.

РЫБОХОЗЯЙСТВЕННАЯ ХАРАКТЕРИСТИКА ЩУКИ ESOX LUCIUS (L.) ТОПО-ПЯОЗЕРСКОГО ВОДОХРАНИЛИЩА (ВОДОСБОР БЕЛОГО МОРЯ)

The article presents the results of the work carried out within the framework of forecast topics and economic contractual topics aimed to assess the stock and production of pike in the Topo-Pyaozero (Kumskoe) Reservoir. There have been studied its main biological and structural-population indicators. Calculations of indicators of pike’s abundance and biomass at the present stage, necessary for the rational regulation of the fishery have been carried out. It was found that the fishing possibilities of the presented pike populations correspond to the production possibilities of its sexually mature part and the value obtained as a result of the biomass increase. Pike should be taken into the commercial operation from the age of 4+ years and older. The performed calculations of the stock size based on the materials of 2009–2020 recommend the volume of the pike total allowable catch at the present stage not less than 36 tons, or 21% of the value of the commercial stock (at the maximum rate of 23.4%). From the results of observations it follows that the abundance and stocks of pike in the Topo-Pyaozero Reservoir make it possible to provide large volumes of catch at the present time, and the total catch can be increased to the calculated values the volume of the allowable catch, provided that a rational fishery is maintained in water bodies. The intensity of fishing and an increase in pike catches in the reservoir should be considered as mandatory measures in terms of biological reclamation in reservoirs

СОСТОЯНИЕ РЫБОЛОВСТВА В ЮЖНОМ РАЙОНЕ ВОЛГО-КАСПИЙСКОГО РЫБОХОЗЯЙСТВЕННОГО БАССЕЙНА

The paper presents the generalized materials on the current state of fisheries in the Northern part of the Caspian Sea (southern region of the Volga-Caspian fisheries basin). It is shown that catches in the North-Western and Tersk-Caspian subdistricts varied in the opposite way: an increase in production in one subdistrict was accompanied by a decrease in the other. The decreasing or increasing catches is due to semi-anadromous (roach, brim, zander, carp) and freshwaterfish species (cat-fish, pike-perch, small size ordinary fish). There have been found the significant relationships between the size of catches in the North-Western and Tersk-Caspian subdistricts with the annual runoff and the volume of spring flooding of the Volga river, which allows to conclude that fish resources are redistributed between these regions depending on the natural conditions of 
 a particular year. In order to more fully develop the fish resources of the southern region of the Volga-Caspian fisheries basin, it is recommended to abandon the division of quotas into parts for the North-Western and Tersk-Caspian subdistricts and to allow the fishing organizations to work at the expense of the total allowable catch

Portuguese Artisanal Fishers’ Knowledge About Elasmobranchs—A Case Study

The high economic value of fisheries was historically associated to commercial teleost fishes. Since the 1970s, despite some elasmobranchs becoming an important target or a bycatch, relatively little research has been carried out on this group because of their low economic value. Due to their specific life history characteristics, sharks and rays are particularly vulnerable to overexploitation, taking several decades to recover after reaching an overexploitation status. In Portugal elasmobranch fishery results mainly from targeted longlining and bycatch from different fishing gears. During the last decade, the Total Allowable Catches (TACs) of rays have been decreasing, the European Union (EU) banned the capture of some ray species, the Portuguese government implemented both a closed season and a minimum landing size for some rays, and the EU prohibited target fishing for sharks. All these measures may have been highly responsible for the national and local landings reduction. Official landings from the last decade were analyzed, the landed species conservation status was consulted, and structured interviews using a questionnaire were conducted in the most important fishing port in the Portuguese mainland, the port of Sesimbra. Results led us to conclude that fishers’ answers and landings data did not match. It also revealed a lack of awareness by fishers about the state of shark and ray populations, and about some aspects of their biology and ecology, like reproduction season and method. The present study highlights the need to fill in this existing gap in knowledge through the transfer of scientific knowledge and sharing of management responsibilities. Also, we aimed to demonstrate the necessity for awareness and education activities within fishing communities, an essential step to elasmobranch conservation.

Can the Japanese fisheries qualify for MSC certification?

Among various ecolabeling schemes, the Marine Stewardship Council (MSC) is the largest certifier of seafood ecolabel for the wild caught fish in the world. An increasing number of fisheries in the world have applied for MSC certification. However, Japanese pre-assessed fisheries, one of the largest seafood producers, have not been keen on applying for the MSC certification. In this paper, we examine whether Japanese pre-assessed fisheries can qualify for MSC certification by using MSC pre-assessment scores of 53 fisheries in Japan. To understand these Japanese pre-assessed fisheries’ place in the world, we compared scores of these fisheries with those of the MSC certified fisheries. By using descriptive statistics, and cluster analyses, we found that most of the Japanese pre-assessed fisheries do not meet the MSC standards. Among other things, The Japanese pre-assessed fisheries targeting at total allowable catch (TAC) species are relatively well managed in terms of stock rebuilding, harvest strategy, and harvest control rules compared with other stock assessed, or non-assessed fish species. A cluster analysis sorted the Japanese pre-assessed fisheries with a good stock status into the similar clusters to the MSC fisheries. Difference in scores between the Japanese and MSC fisheries is ecological performance including approach for bycatch and endangered species. We found that the Japanese fisheries have a possibility to be strong candidates by adopting bycatch strategies.

Spatio-temporal interactions between Northeast Atlantic Mackerel and its fishery - Simulating different futures

The mackerel (Scomber scombrus) stock is one of the commercially most important pelagic species in the Northeast Atlantic, being targeted by various nations. Environmental and stock size changes caused a stock expansion after 2007, initiating a yet unresolved dispute between the European Union, United Kingdom, Iceland, Greenland and the Faroe Islands. We analyze the impacts of different Total Allowable Catches (TACs) on the mackerel stock and possible adaptations in simulated fleet behavior by applying an age-structured bio-economic optimization and simulation model, FishRent. We implement dynamic seasonal migration patterns, which alter the spatial extension of mackerel depending on biomass levels, assuming density dependent mechanisms. If true, this is an important consideration because it may provide the possibility for major fishing parties (the European Union, Norway and the UK) to exclude minor parties (Iceland) from fishing mackerel by selecting a high enough fishing pressure and therefore keeping the stock from migrating further north. This can, for instance, be achieved by setting a corresponding TAC. When applying a TAC under a business-as-usual scenario or higher, the stock biomass decreased close to BMSY on the long-term. In this case, the Danish fleets would benefit, increasing their profit up to 80%. All other fleets were negatively affected with a profit decreasing between 50% and 100% depending on the scenario. When applying a TAC according to the stock advice, the stock biomass was estimated to increase on the long-term. This benefitted the Irish and British fleets, but effects on the Icelandic fleet were neutral.

‘It’s how you catch the fish’: debates on ecolabelling, yield thinking, and care in Denmark

Since the second half of the 20th century, Maximum Sustainable Yield (MSY) has been the guiding principle of fisheries management, focused on reaching sustainability through bioeconomic modelling and harvest regulations. MSY has allowed managers to set Total Allowable Catch levels for target species with further implications for various forms of catch share programs. In this article, we employ a feminist ethic of care approach and literature on local environmental stewardship to analyze the case of a Danish environmental organization trying to introduce another dimension to fisheries management grounded on the concept of care and collective responsibility. The case includes two related attempts of establishing ecolabelling schemes for small-scale fisheries focused on a concept of careful/gentle fishing. Through the case study, we trace how a management focus on yield hinders the care perspective but also engenders forms of local and national resistance.

Vulnerability Assessment of Pelagic Sharks in the Western North Pacific by Using an Integrated Ecological Risk Assessment.

Simple SummaryA new integrated ecological risk assessment (ERA) including the IUCN Red List category, the body weight variation trend of 1989–2011 with large sample size (n > 678,000), and the inflection point of population growth curve coupled with the ERA was developed to assess the impact of longline fishery on the pelagic sharks in the western North Pacific. The intrinsic rate of population growth was used to estimate the productivity, and the susceptibility was estimated by the multiplication of the catchability, selectivity, and post-capture mortality. Five groups were identified based on the cluster analysis coupling with non-parametric multi-dimensional scaling. Rigorous management measures are recommended for the scalloped hammerhead, silky, and spinner shark at highest risk, setting total allowable catch quota is recommended for the bigeye thresher, and sandbar shark, and a consistent monitoring scheme is suggested for the smooth hammerhead, shortfin mako, pelagic thresher, oceanic whitetip, and dusky shark.The vulnerability of 11 pelagic shark species caught by the Taiwanese coastal and offshore longline fisheries in the western North Pacific were assessed by an ecological risk assessment (ERA) and 10 of the 11 species was assessed by using an integrated ERA developed in this study. The intrinsic rate of population growth was used to estimate the productivity of sharks, and the susceptibility of sharks was estimated by the multiplication of the catchability, selectivity, and post-capture mortality. Three indices namely, the IUCN Red List category, the body weight variation trend, and the inflection point of population growth curve coupled with ERA were used to conduct an integrated ERA. The results indicated that the scalloped hammerhead is at the highest risk (group 1), followed by the silky shark, and the spinner shark at high risk (group 2). The bigeye thresher, and sandbar shark fall in group 3, the smooth hammerhead falls in group 4, and the shortfin mako, pelagic thresher, oceanic whitetip, and dusky shark fall in group 5. Rigorous management measures for the species in groups 1 and 2, setting total allowable catch quota for group 3, and consistent monitoring schemes for groups 4 and 5 are recommended.

Market integration between the major domestic fish markets in Australia

The Southern and Eastern Scalefish and Shark Fishery (SESSF) is the main domestic supplier of fresh wild-caught fish to the Sydney and Melbourne markets. The fishery is managed through a series of total allowable catches (TACs) for key species, with an objective of achieving maximum economic yield (MEY) with biomass and fishing mortality at MEY as management targets. However, the sensitivity of seafood prices in identifying MEY for this fishery and Australian fisheries in general has been largely ignored and understudied. This article explores the spatial integration of domestic fish prices across the two main fish wholesale markets in Australia located in Sydney and Melbourne, using relatively simple market integration analysis of historical monthly price data (1999–2010). Price data collection in the Melbourne Fish Market ceased in 2010 after the privatization of the market and more recent data are not available. The analysis determined if there were any fundamental differences between the two major domestic fish markets in Australia, and to draw implications for bioeconomic modelling to identify MEY-based targets.

A Bioeconomic Analysis of the Sandfish (Arctoscopus japonicus) Management Policies of the Eastern Sea Danish Fishery in Korea

Before implementing resource management measures, it is essential to establish the goals of fisheries resource management by assessing the current biomass status and the level of fishing effort. This study aims to compare surplus production models, i.e., process-error and state-space models, based on how they fit the observed data. The effects of the Sandfish Stock Rebuilding Plan are analyzed using a bioeconomic model. The analytical results show that the least error is between the estimated and observed catch per unit effort using the state-space model. Therefore, the analysis results obtained using the state-space model are considered as the most reliable. The total allowable catch for Korean sandfish is set at 2196 tons per year. However, if we increase the current management regulation standard for available annual catch by 50%, the sandfish resource could be depleted. Furthermore, NPV decreased to 172,599 thousand won after ten years, in 2029. Therefore, a recommendation of this study is that when management policies for sandfish stock prioritize recovery, this would facilitate fisheries rebuilding.

A game theoretic perspective on the management of shared North Sea fishery resources: Pre and post Brexit

Since the introduction of the 200 nautical mile Exclusive Economic Zone (EEZ) regime, North Sea coastal states have cooperated in the management of shared stocks. Norway and the EU have jointly managed six shared stocks through the 1980 Agreement which includes the annual setting of total allowable catch quotas (TACs), quota shares and access agreements. This article first attempts to explain in a game theoretic context why cooperative management of shared North Sea fish stocks has been stable for more than 40 years. Brexit represented a shock to the cooperative agreement, and there are now three parties to the negotiations. The UK EEZ is important not only for British fishermen, but also for Norway and the EU27. The UK and the EU have agreed on a Trade and Cooperation Agreement which includes fisheries, but Norway and the UK have not yet reached a fisheries agreement. In the second part of the article we analyse the UK-EU fisheries agreement, the continuation of the 1980 Agreement, and the future fisheries relationship between the UK and Norway.

АНАЛИЗ ОСВОЕНИЯ СЫРЬЕВОЙ БАЗЫ СЕВЕРО-КУРИЛЬСКОЙ ЗОНЫ ДАЛЬНЕВОСТОЧНОГО РЫБОХОЗЯЙСТВЕННОГО БАССЕЙНА В 2010–2019 ГГ.

The article presents the analysis of the development of commercial objects in the North-Kuril zone of the Far Eastern fisheries basin for a ten-year period. The resource potential of this zone was found to consist of 11 objects for which the total allowable catches were established (TAC objects) and of 4 objects, the extraction of which is carried out within the recommended volumes (non-TAC objects). The main objects of production in the North-Kuril zone were pollock, Commander squid and terpug, the production volumes of each species, in the total catch of all objects, amounted to 48, 26 and 13%, respectively. The production volumes of the rest commercial objects amounted to a total of about 13%. An analysis of the dynamics of changes in the TACs was carried out for each test fishing object. A decrease of catch volumes in 2019, compared to 2010, was observed in three objects: terpugs, halibut and macrurus. For these objects during the period under review there was found a decrease in TAC volumes. Analysis of the development of the objects under study during the period 2010-2019 showed that crabs, scallops and pollock in the studied time interval had consistently high catch volumes and a high degree of development. The average rate of development of these objects was about 90% or more. The remaining 8 fishing objects were under-developed annually. The average degree of development of Far Eastern flounder, Commander squid, terpug, cod, sea bass was about 55-75%. The lowest average rate of development (less than 50%) was observed in halibut, pinchback and macrurus. It has been inferred that it is necessary to conduct further studies of fishing activities to develop the resource potential for subsequent modeling and optimization of fishing processes

Capture Fishery Production in Bintan Regency

The waters of Bintan Island are included in the deep sea waters of the South China Sea, within the Indonesian Exclusive Economic Zone, the potential for fish resources in the territorial waters and the South China Sea reaches 378.2 tons, with the allowable catch of 302.5 thousand tons. From this potential, the potential for fish resources that enter the territorial waters of Bintan Regency is 106,018 tons with a allowable catch of 50,287 tons. The purpose of the preparation of this scientific article is to provide information about capture fisheries production in Bintan Regency. The preparation of this scientific article was carried out in April 2021 in Bintan Regency using a descriptive analysis based on a literature review using secondary data as a source of information. The volume of fishery production originating from fishing efforts in Bintan Regency was recorded at 53,338.45 tons in 2017, while in 2018 and 2019 it was 54,682.27 tons and 55,604.40 tons, respectively. The amount of capture fisheries production in Bintan Regency has increased over the last 3 years (2017 - 2019).