scholarly journals Viewpoint: the interface between scientific advice and fisheries managementa

2007 ◽  
Vol 64 (4) ◽  
pp. 846-850 ◽  
Author(s):  
Kjartan Hoydal
Keyword(s):  
Fisheries Management ◽  
Fishery Management ◽  
Objective Assessment ◽  
Social Constraints ◽  
Scientific Advice ◽  
Fishing Mortality ◽  
Management Framework ◽  
The North ◽  
Sustainable Fishery ◽  
The Impact

Abstract Hoydal, K. 2007. Viewpoint: the interface between scientific advice and fisheries management. – ICES Journal of Marine Science, 64: 846–850. Basic elements in responsible, robust, and sustainable fishery management frameworks are well understood and easily listed. Common sense and international law underline the prominent role of science in management. Most managers request peer-reviewed advice based on an objective assessment of the impact of fisheries on marine ecosystems, to create a basis for sustainable and profitable fisheries. Management systems in the North Atlantic rely extensively on advice on total allowable catches (TACs) to control fishing mortality in stocks under regulation. This leads to an unhelpful focus on inherently uncertain catch forecasts. With the wisdom of hindsight, TACs have rarely led to the predicted reduction in fishing mortality. And because of the focus on TACs, other elements in the management framework, notably overcapacity and other economic and social constraints, do not receive the necessary attention. A comparison of the way fishing advice is acquired with the same process in the hydrocarbon extraction industry draws attention to the multi-user problem in marine fisheries management.

scholarly journals Is a management framework based on spawning-stock biomass indicators sustainable? A viability approach

2007 ◽  
Vol 64 (4) ◽  
pp. 761-767 ◽  
Author(s):  
Michel De Lara ◽  
Luc Doyen ◽  
Thérèse Guilbaud ◽  
Marie-Joëlle Rochet
Keyword(s):  
Fisheries Management ◽  
Significant Contribution ◽  
Bay Of Biscay ◽  
Fishing Mortality ◽  
Precautionary Approach ◽  
Management Framework ◽  
Control Approach ◽  
Management Indicators ◽  
Stock Biomass ◽  
Spawning Stock

Abstract De Lara, M., Doyen, L., Guilbaud, Th., and Rochet, M-J. 2007. Is a management framework based on spawning-stock biomass indicators sustainable? A viability approach. – ICES Journal of Marine Science, 64: 761–767: 000–000. Fisheries management agencies have to drive resources on sustainable paths, i.e. within defined boundaries for an indefinite time. The viable-control approach is proposed as a relevant method to deal with sustainability. We analyse the ICES precautionary approach (PA) by means of the notion of viability domain, and provide a mathematical test for sustainability. It is found that the PA based on spawning-stock biomass (SSB) and fishing mortality (F) indicators is sustainable only when recruits make a significant contribution to SSB. In this case, advice based upon SSB, with an appropriate reference point, is sufficient to ensure sustainability. In all other cases, SSB is not a sufficient metric of stock productivity and must be complemented with other management indicators to ensure sustainability. The approach is illustrated with numerical applications to the northern hake and Bay of Biscay anchovy.

scholarly journals Relations of COVID-19 and the Risk Management Framework

2021 ◽  
Vol 13 (21) ◽  
pp. 11854
Author(s):  
Jozef Klucka ◽  
Rudolf Gruenbichler ◽  
Jozef Ristvej
Keyword(s):  
Risk Management ◽  
Ad Hoc ◽  
Mitigation Strategies ◽  
Negative Consequences ◽  
Management Framework ◽  
The North ◽  
Risk Management Framework ◽  
Internet Resources ◽  
Internal Procedures ◽  
The Impact

The routine approach used in risk management is based on the scheme that within the prevention period an organisation or a state prepares for the expected risks and once the risks occur, resources and internal procedures are implemented to mitigate their negative consequences. The objective of the paper is to analyse risk management and its constraints, its application in COVID-19 period and based on it provide mitigating strategies for specific problems/risks related to COVID-19. The research methods related to the topics are: (a) study of books, newspapers and other internet resources and (b) interviews with COVID-19 managers at district and regional level in the north of Slovakia. The proposals for mitigation strategies are based on the basic assumption relevant for COVID-19 that there are risks with unknown probability and unknown consequences. Therefore, the mitigation strategies are adapted to the current situation, which includes lack of data and know-how, lack of experience, political and economic unrest and social problems. The impact of constraints is based on an ad-hoc or unplanned and clearly structured approach. Problems and risks are identified and mitigation strategies are proposed. The proposed measures (quantitative/qualitative) should be evaluated and via benchmarking the development and efficiency of applied measures monitored and assessed. The output of identified risk-known and –unknown creates a framework for implementation.

scholarly journals Minimizing the Impact of Yellowfin Tuna Thunnus albacares fishing in Banda Sea

2021 ◽  
Author(s):  
Haruna
Keyword(s):  
Fishery Management ◽  
Average Length ◽  
Yellowfin Tuna ◽  
Minimum Size ◽  
Thunnus Albacares ◽  
Natural Mortality ◽  
Fishing Mortality ◽  
Mortality Ratio ◽  
Tuna Fisheries ◽  
The Impact

The declining trend of Yellowfin Tuna Thunnus albacares production in Fishery Management Territory of Indonesia 714 nowadays will affect the demand for tuna products in Indonesia and global. Regarding the management purposes, the impact of fishing needs to be minimized. Therefore, the estimation of population structure based on the length and age is very important to be studied. The data were collected from November 2015 to October 2016 from longline and handline catching activities operated in the Banda Sea. The average length of yellowfin tuna caught with longline and handline was 98.5 cm and the first length maturity was Lm 103.6 cm. The result showed that the first yellowfin tuna caught was Lc_opt 125.2 cm, where fishing mortality ratio toward natural mortality was at the level that endangered the sustainability of yellowfin tuna fisheries in the Banda Sea. To minimize the impact, there needs to be a minimum size regulation of yellowfin tuna that should be landed

scholarly journals Precision Fishery Management Framework Based on Fisheries Management Area

2021 ◽  
Vol 912 (1) ◽  
pp. 012074
Author(s):  
Yonvitner ◽  
J Sartin
Keyword(s):  
Fisheries Management ◽  
Carrying Capacity ◽  
Fish Consumption ◽  
Fishery Management ◽  
Capacity Utilization ◽  
Logical Framework ◽  
Fish Processing ◽  
Fisheries Governance ◽  
Management Framework ◽  
Management Area

Abstract Implementing precision fisheries management is a challenge for fisheries governance. Precision fisheries management might depend on the availability of data, area, carrying capacity, utilization, labor, industrial capacity, and fish consumption of the community. For Indonesia, the Fisheries Management Areas (FMAs) approach could become the basis for traceability and measurability of precision fisheries management. To ensure its effectiveness, the design of precision fisheries management must be started with the development of a logical framework, which then serves as a foundation for a further management design. This paper aims to present a management framework for precision fisheries management based on Fisheries Management Area. The framework covers sub sector in fisheries including capture fisheries, aquaculture, fish processing, and conservation activities. Meanwhile, supervision is the cornerstone that will oversee the implementation of all the fisheries sub sector. The framework shows that spatial-based data is one of the determinants in the efficacy of precision fisheries management.

scholarly journals BIOLOGICAL BASE OF SKIPJACK AS THE FOUNDATION FOR SUSTAINABLE FISHERIES MANAGEMENT IN THE NORTH MALUKU PROVINCE

2016 ◽  
Vol 8 (1) ◽  
Author(s):  
Amirul Karman ◽  
Sulaeman Martasuganda ◽  
M. Fedi A. Sondita ◽  
Mulyono S. Baskoro
Keyword(s):  
Surface Water ◽  
Fisheries Management ◽  
Fishery Management ◽  
Size Composition ◽  
Biological Data ◽  
Study Objective ◽  
Gonad Maturity ◽  
The North ◽  
Western Zone ◽  
First Maturity

<p><em>Skipjacks in the western and southern waters of North Maluku Province were caught using pole and line with FADs. Skipjack usually swims near the surface water and  tends to be classified as a juvenile skipjack that caught during fishing activities. The study objective was to analyze biological data of skipjack including length weight  relationship, growth, length at first maturity/lm and catch size, size composition and gonad maturity. Skipjack samples were caught in the waters of the western (zone A) and southern (zone b) areas of North Maluku Province, from April 2012 until May 2013. The sudy results show the value bof  skipjack caught around FADs  at zone A and B were similar as b=3. This indicates that the growth of skipjack in both areas was categorized as in isometric pattern. L∞  of skipjack caught at zone A  was 75 cm at the age of 56 months and  at zone B was 76 cm at the age of 56 months. Lm value skipjack caught in zone A and zone B was obtained by 43 cm, with a range of long-forked skipjack caught in zone A from 26.0 to 72.0 cm, and at zone B from 26- to 71 cm , The gonad maturity at zone A and  B, was obtained in  the similar stages as  maturity stages I, II, III,IV, and V.</em> <em>TKG V of the skipjack caught around FADs zone A is found in March and B in July, so it can be presumed skipjack in two zones throughout the year with peak spawning occurs in March for zone A and  B in July.</em></p><p><strong><em>Keywords</em></strong><em>: Biological base, skipjack, fishery management, North Maluku</em></p>

scholarly journals Defining the economic scope for ecosystem-based fishery management

2019 ◽  
Vol 116 (10) ◽  
pp. 4188-4193 ◽  
Author(s):  
Kailin Kroetz ◽  
Matthew N. Reimer ◽  
James N. Sanchirico ◽  
Daniel K. Lew ◽  
Justine Huetteman
Keyword(s):  
Network Analysis ◽  
Fisheries Management ◽  
Fishery Management ◽  
Fisheries Economics ◽  
Ecological Connectivity ◽  
Management Framework ◽  
Management Changes ◽  
Ecosystem Based Fisheries Management ◽  
Traditional Indicator

The emergence of ecosystem-based fisheries management (EBFM) has broadened the policy scope of fisheries management by accounting for the biological and ecological connectivity of fisheries. Less attention, however, has been given to the economic connectivity of fisheries. If fishers consider multiple fisheries when deciding where, when, and how much to fish, then management changes in one fishery can generate spillover impacts in other fisheries. Catch-share programs are a popular fisheries management framework that may be particularly prone to generating spillovers given that they typically change fishers’ incentives and their subsequent actions. We use data from Alaska fisheries to examine spillovers from each of the main catch-share programs in Alaska. We evaluate changes in participation—a traditional indicator in fisheries economics—in both the catch-share and non–catch-share fisheries. Using network analysis, we also investigate whether catch-share programs change the economic connectivity of fisheries, which can have implications for the socioeconomic resilience and robustness of the ecosystem, and empirically identify the set of fisheries impacted by each Alaska catch-share program. We find that cross-fishery participation spillovers and changes in economic connectivity coincide with some, but not all, catch-share programs. Our findings suggest that economic connectivity and the potential for cross-fishery spillovers deserve serious consideration, especially when designing and evaluating EBFM policies.

scholarly journals A multi-stock harvest control rule based on “pretty good yield” ranges to support mixed-fisheries management

2019 ◽  
Author(s):  
Dorleta Garcia ◽  
Paul J Dolder ◽  
Ane Iriondo ◽  
Claire Moore ◽  
Raúl Prellezo ◽  
...  
Keyword(s):  
Fisheries Management ◽  
Stock Assessment ◽  
Holistic Approach ◽  
Fishing Mortality ◽  
Fish Stocks ◽  
Control Rule ◽  
Harvest Control Rule ◽  
The Impact ◽  
Ecosystem Based Fisheries Management

Abstract Advice for commercially exploited fish stocks is usually given on a stock-by-stock basis. In light of the ecosystem-based fisheries management, the need to move towards a holistic approach has been largely acknowledged. In addition, the discard bans in some countries requires consistent catch advice among stocks to mitigate choke species limiting fisheries activity. In this context, in 2015, the European Commission proposed the use of fishing mortality ranges around fishing mortality targets to give flexibility to the catch advice system and improve the use of fishing opportunities in mixed-fisheries. We present a multi-stock harvest control rule (HCR) that uses single stock assessment results and fishing mortality ranges to generate a consistent catch advice among stocks. We tested the performance of the HCR in two different case studies. An artificial case study with three stocks exploited simultaneously by a single fleet and the demersal mixed-fishery operating in Bay of Biscay and Celtic Sea. The HCR produced consistent catch advice among stocks when there was only a single fleet exploiting them. Even more, the HCR removed the impact of the discard ban. However, in a multi-fleet framework the performance of the HCR varied depending on the characteristics of the fleets.

scholarly journals PERFORMANCE OF A FISHERY HARVESTING DIFFERENT MINIMUM SHRIMP SIZES IN THE ARAFURA SEA

2012 ◽  
Vol 18 (2) ◽  
pp. 79
Author(s):  
Purwanto Purwanto
Keyword(s):  
Fishery Management ◽  
Optimal Size ◽  
Natural Mortality ◽  
Economic Approach ◽  
Fishing Mortality ◽  
Arafura Sea ◽  
Total Profit ◽  
Bell Model ◽  
The Impact ◽  
Near Future

Avoiding overfishing and ensuring the sustainability of the shrimp stock in the Arafura Sea are of prime importance for fishery management. Exploited shrimp stock consists of several cohorts, and grows considerably with age. When the shrimps are caught before the cohort has had the opportunity to achieve its optimum biomass level, the fishery will lose much of the potential benefit that could be achieved by catching them in the near future. Therefore, a bio-economic approach was developed, on the basis of the length-based Thompson &amp; Bell model, to evaluate the impact of harvesting different size of shrimps on fishery performance. The result of analysis shows that the fishery achieved the optimal total profit when the shrimp size at first-capture and fishing mortality were 29 mm CL and 0.50, respectively. The total profit to the fishery would be sub-optimal when the shrimp size at-first-capture was smaller or larger than the optimal size. Further, it was more economical to harvest shrimps at the larger size and higher fishing mortality, and resulting in higher total profit, when natural mortality decreased.

scholarly journals Fine-scale fisheries co-management through cooperative acoustic surveys

2018 ◽  
Author(s):  
OCTO
Keyword(s):  
Fisheries Management ◽  
North Pacific ◽  
Fishery Management ◽  
Aleutian Islands ◽  
Small Areas ◽  
The North ◽  
Acoustic Surveys ◽  
Temporal And Spatial ◽  
Management Council ◽  
The North Pacific

The authors describe a method of collaborative fisheries management offering both fine temporal- and spatial-scale resolution which was trialed in Alaska’s Aleutian Islands walleye pollock fishery. In this fishery, scientists, locals, and industry are highly-engaged and already involved in a co-management process set forth by the North Pacific Fishery Management Council. This methodology involves fishers using off-the-shelf commercial echosounders to conduct acoustic surveys in small areas to enhance existing fisheries data (such as estimates of total catch from fisheries observers) in an effort to allow more harvest without affecting nearby threatened species.

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