scholarly journals Catch shares drive fleet consolidation and increased targeting but not spatial effort concentration nor changes in location choice in a multispecies trawl fishery

2019 ◽  
Vol 76 (12) ◽  
pp. 2377-2389 ◽  
Author(s):  
Peter T. Kuriyama ◽  
Daniel S. Holland ◽  
Lewis A.K. Barnett ◽  
Trevor A. Branch ◽  
Robert L. Hicks ◽  
...  
Keyword(s):  
Fishery Management ◽  
Location Choice ◽  
Fishing Effort ◽  
Fishing Activity ◽  
Catch Shares ◽  
Capital Costs ◽  
Trawl Fishery ◽  
Management Objectives ◽  
The Us ◽  
Fisher Behavior

Catch share systems are generally expected to increase economic rents in fisheries by increasing harvest efficiency, reducing capital costs through consolidation, and increasing the value of landed catch. However, these benefits may have costs, as consolidation and the potential for associated change in spatial distribution in landings can hinder social objectives such as maintaining access for fishery-dependent communities and small owner-operators. Achievement of such fishery management objectives are determined by changes in fisher behavior, which may be complex and difficult to predict. Predicting fisher behavior is particularly challenging in multispecies fisheries, in which the mix of species is a determinant of where and when fishing effort and landings occur. We evaluate changes in overall fishing effort, species targeting, and determinants of fishing location choice in response to catch shares in the US West Coast Groundfish Trawl Fishery. We found reductions in total fishing effort, increased targeting of some species, and no evidence of spatial effort concentration. Key determinants of location choice (distance, expected revenue, and recently fished locations) were similar among time periods, but after catch shares there was more avoidance of areas that lacked recent fishing activity or associated information with which to develop expectations of catch and bycatch. Additionally, location choice remained constant with up to 100-fold financial penalties on bycatch species.

scholarly journals Bioeconomic Approach for Assessing Status of Trawl Fishery in the Straits of Malacca

2021 ◽  
Vol 34 (4) ◽  
Author(s):  
HOONG SANG WONG ◽  
◽  
CHEN CHEN YONG ◽  
AZMAH OTHMAN
Keyword(s):  
Fishery Management ◽  
Statistical Tests ◽  
Fishing Effort ◽  
Current Status ◽  
Fish Stock ◽  
Base Case ◽  
Current Effort ◽  
Price Inflation ◽  
Trawl Fishery ◽  
Straits Of Malacca

The Straits of Malacca provides half of Malaysia’s total marine fish and seafood supply. Due to depleted fish stock, the Malaysian Government has established a comprehensive legal framework to reduce overfishing in the Straits over the last five decades. However, there are limited scientific studies on the current status of stock recovery. This paper aims to use bioeconomic approach to determine the current trawl fishery status in the Straits. Various statistical tests showed that the Clarke-Yoshimoto-Pooley model was better than the Schnute model in predicting and thus used to estimate the crucial bioeconomic parameters. The current yield and standardised effort of 239,692 tonnes and 931,692 standard fishing days were very close to the estimated biological maximum sustainable yield (239,915 tonnes) and above 18 % of the standardised effort (763,649 standard fishing days) to achieve it. The maximum economic yield was estimated at 201,542 tonnes while the corresponding standardised effort was 396,799 standard fishing days indicating serious economic overfishing in the Straits. If the current effort can be reduced by 57 %, fish biomass and economic rent will increase by 97 % and 835 %, respectively. A price sensitivity analysis predicted that demand-pull fish price inflation could exacerbate the overfishing problem, particularly under unrestrained environment. A 50 % increase in price could lead to a 132 % increase in fishing effort from the base case. The findings of this paper provide valuable insights for fishery managers to refine their existing fishery management program to achieve sustainable fishery for the future.

scholarly journals Accuracy of VMS data from Norwegian demersal stern trawlers for estimating trawled areas in the Barents Sea

2011 ◽  
Vol 68 (8) ◽  
pp. 1615-1620 ◽  
Author(s):  
K. L. Skaar ◽  
T. Jørgensen ◽  
B. K. H. Ulvestad ◽  
A. Engås
Keyword(s):  
Large Scale ◽  
Barents Sea ◽  
Linear Interpolation ◽  
Fishing Effort ◽  
Small Scale ◽  
Fishing Activity ◽  
Trawl Fishery ◽  
The Barents Sea ◽  
Global Positioning ◽  
Gps Trajectories

Abstract Skaar, K. L., Jørgensen, T., Ulvestad, B. K. H., and Engås, A. 2011. Accuracy of VMS data from Norwegian demersal stern trawlers for estimating trawled areas in the Barents Sea. – ICES Journal of Marine Science, 68: 1615–1620. The accuracy of vessel monitoring system (VMS) data, used to determine fishing activity in the trawl fishery for gadoids in the Barents Sea, was studied by observer notes and Global Positioning System (GPS) data from two Norwegian vessels in October 2007. A speed rule of 2–5 knots correctly classified 75–80% of the fishing activity and 85–90% of the non-fishing activity. Linear interpolation between hourly VMS recordings underestimated trawl trajectories by 15%. The median haulwise difference between the VMS and the GPS trajectories was ∼500 m. The interpolated VMS data are appropriate for mapping the large-scale distribution of fishing effort and the area impacted, but to link fishing activities with small-scale mapping of benthos, more-frequent VMS-update times and more-refined interpolation techniques are required.

Spatiotemporal occurrence of loggerhead turtles (Caretta caretta) on the West Florida Shelf and apparent overlap with a commercial fishery

2014 ◽  
Vol 71 (12) ◽  
pp. 1924-1933 ◽  
Author(s):  
Robert F. Hardy ◽  
Anton D. Tucker ◽  
Allen M. Foley ◽  
Barbara A. Schroeder ◽  
Robin J. Giove ◽  
...  
Keyword(s):  
Fishery Management ◽  
Temporal Distribution ◽  
Caretta Caretta ◽  
Fishing Effort ◽  
Conservation Strategies ◽  
West Florida Shelf ◽  
The West ◽  
Fishing Activity ◽  
Florida Shelf ◽  
Loggerhead Turtles

Information on the spatial and temporal distribution of protected marine species is critical for the development of conservation strategies. We examined a 12-year dataset describing the postnesting residence areas of 81 adult female loggerhead turtles (Caretta caretta) on the West Florida Shelf (WFS) in the northeastern Gulf of Mexico. The aggregation of loggerheads on the WFS represents at least four US recovery units for this protected species. We identified several seasonally persistent residence areas that were shared by multiple loggerheads on the WFS. The majority (69%) of individuals remained within a discrete residence area throughout the tracking period. We placed our results within the context of a related fishery management concern — loggerhead bycatch within the bottom longline component of the Gulf commercial reef-fish fishery. We characterized loggerhead residence areas and compared that information with fishing activity. Our results provide information on the distribution of WFS loggerhead residence areas and the extent to which residence areas overlap with areas of high fishing effort. Loggerheads were present year-round on portions of the WFS, within or near to areas with high fishing effort. Interactions among loggerheads and fishing activities could be reduced by conservation management strategies that consider these spatial and seasonal patterns of occurrence.

scholarly journals Northern Shortfin Squid (Illex illecebrosus) Fishery Footprint on the Northeast US Continental Shelf

2021 ◽  
Vol 8 ◽  
Author(s):  
Brooke A. Lowman ◽  
Andrew W. Jones ◽  
Jeffrey P. Pessutti ◽  
Anna M. Mercer ◽  
John P. Manderson ◽  
...  
Keyword(s):  
Continental Shelf ◽  
Fishery Management ◽  
Species Distribution Model ◽  
Population Distribution ◽  
Fishing Effort ◽  
Distribution Model ◽  
Substantial Impact ◽  
The Us ◽  
Limited Degree ◽  
Northeast Us

Northern shortfin squid (Illex illecebrosus) have presented a challenge for US fishery management because of their life history traits and broad population distribution. They are characterized by a short semelparous lifespan and high interannual variability in recruitment. Much of the stock resides outside of the boundaries of existing US fisheries surveys and US fishing effort. Based on the annual migration pattern and broad geographic distribution of shortfin squid, it is believed that the US squid fishery in the Mid-Atlantic has not had a substantial impact on the stock; however, recent catches are viewed as tightly constrained by quotas. To better estimate the potential impact of fishing on the resource, we worked with industry representatives, scientists, and managers to estimate the availability of the northern shortfin squid stock on the US continental shelf to the US fishery. Taking a novel analytical approach, we combine a model-based estimate of the area occupied by northern shortfin squid with the empirical US commercial shortfin squid fishery footprint to produce estimates of the area of overlap. Because our method overestimates the fishery footprint and underestimates the full distribution of the stock, we suggest that our estimates of the overlap between the area occupied by the squid and the fishery footprint is a way to develop a conservative estimate of the potential fishery impact on the stock. Our findings suggest a limited degree of overlap between the US fishery and the modeled area occupied by the squid on the US continental shelf, with a range of 1.4–36.3%. The work demonstrates the value of using high-resolution, spatially explicit catch and effort data in a species distribution model to inform management of short-lived and broadly distributed species, such as the northern shortfin squid.

scholarly journals Finding the accelerator and brake in an individual quota fishery: linking ecology, economics, and fleet dynamics of US West Coast trawl fisheries

2013 ◽  
Vol 71 (2) ◽  
pp. 308-319 ◽  
Author(s):  
Isaac C. Kaplan ◽  
Daniel S. Holland ◽  
Elizabeth A. Fulton
Keyword(s):  
West Coast ◽  
Fishery Management ◽  
Fishing Effort ◽  
Target Species ◽  
The Pacific ◽  
The Us ◽  
Fleet Dynamics ◽  
Us West ◽  
Trawl Fisheries ◽  
Management Council

Abstract Isaac C. Kaplan, Daniel S. Holland, and Elizabeth A. Fulton. 2014. Finding the accelerator and brake in an individual quota fishery: linking ecology, economics, and fleet dynamics of US West Coast trawl fisheries. – ICES Journal of Marine Science, 71: 308–319. In 2011, the Pacific Fisheries Management Council implemented an individual transferrable quota (ITQ) system for the US West Coast groundfish trawl fleet. Under the ITQ system, each vessel now receives transferrable annual allocations of quota for 29 groundfish species, including target and bycatch species. Here we develop an ecosystem and fleet dynamics model to identify which components of an ITQ system are likely to drive responses in effort, target species catch, bycatch, and overall profitability. In the absence of penalties for discarding over-quota fish, ITQs lead to large increases in fishing effort and bycatch. The penalties fishermen expect for exceeding quota have the largest effect on fleet behaviour, capping effort and total bycatch. Quota prices for target or bycatch species have lesser impacts on fishing dynamics, even up to bycatch quota prices of $50 kg−1. Ports that overlap less with bycatch species can increase effort under individual quotas, while other ports decrease effort. Relative to a prior management system, ITQs with penalties for exceeding quotas lead to increased target species landings and lower bycatch, but with strong variation among species. The model illustrates how alternative fishery management policies affect profitability, sustainability and the ecosystem.

scholarly journals Sustainable exploitation of temperate fish stocks

2009 ◽  
Vol 6 (1) ◽  
pp. 124-127 ◽  
Author(s):  
Henrik Sparholt ◽  
Robin M. Cook
Keyword(s):  
Species Interactions ◽  
Fishery Management ◽  
Regional Scale ◽  
Single Species ◽  
Fishing Effort ◽  
Theoretical Concept ◽  
Maximum Sustainable Yield ◽  
Production Model ◽  
The Status ◽  
Long Time

The theory of maximum sustainable yield (MSY) underpins many fishery management regimes and is applied principally as a single species concept. Using a simple dynamic biomass production model we show that MSY can be identified from a long time series of multi-stock data at a regional scale in the presence of species interactions and environmental change. It suggests that MSY is robust and calculable in a multispecies environment, offering a realistic reference point for fishery management. Furthermore, the demonstration of the existence of MSY shows that it is more than a purely theoretical concept. There has been an improvement in the status of stocks in the Northeast Atlantic, but our analysis suggests further reductions in fishing effort would improve long-term yields.

Capital budgeting practices: evidence from Korea

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Taeyeon Kim ◽  
Hongbok Lee ◽  
Kwangwoo Park ◽  
Doug Waggle
Keyword(s):  
Best Practices ◽  
Capital Budgeting ◽  
Developed Countries ◽  
Financial Advisors ◽  
Cost Of Equity ◽  
Content Type ◽  
Capital Costs ◽  
Developed Markets ◽  
The Us ◽  
Ceo Age

PurposeThe authors present the results of a survey on how Korean firms evaluate new projects and estimate their capital costs. The authors report how Korean firms’ capital budgeting practices compare to other developed countries and to best practices in the field of finance.Design/methodology/approachThe authors survey CFOs of major Korean firms on their capital budgeting practices. The authors then compare the results against the US and European firms and best practices of leading firms and financial advisors.FindingsThe authors find that the capital budgeting practices of Korean firms are as strong as or stronger than firms in developed markets. A majority of Korean firms use best practices techniques such as NPV, IRR and the CAPM for project evaluation and cost of equity estimation. Chaebol affiliation results in somewhat stronger capital budgeting practices. The authors also find that other factors, such as company size, leverage, CEO age and CEO education, impact capital budgeting practices.Originality/valueThis paper is the first article that comprehensively examines Korean firms' capital budgeting practices.

scholarly journals Does the closed fishing season influence the ichthyofauna consumed by Larus dominicanus?

2017 ◽  
Vol 65 (1) ◽  
pp. 9-18 ◽  
Author(s):  
Maiara Larissa Miotto ◽  
Barbara Maichak de Carvalho ◽  
Henry Louis Spach
Keyword(s):  
Bird Species ◽  
Strong Relationship ◽  
Morphometric Measurements ◽  
Fishing Activity ◽  
Trawl Fishery ◽  
Shrimp Trawl ◽  
Larus Dominicanus ◽  
The Family ◽  
The Mean ◽  
Closed Season

Abstract Fish that are incidentally caught by shrimp trawling represent a predictable and abundant resource for feeding several bird species, especially for the gull Larus dominicanus. This fishing activity is subject to disruptions throughout the year during closed fishing seasons, when other fishing modalities are exercised, which can alter the composition, abundance and size of the fish bycatch. This study evaluated the influence of the restriction of fishing period of shrimp (closed season) on the diet of L. dominicanus, on the Paraná State coast. From December 2013 to August 2014, 10 pellets were collected per month in two distinct areas that have shrimp trawl fishery as the main economic activity: one continental and another in an estuarine island. In total, 920 fish were identified, divided into four families and 15 species, especially the family Sciaenidae with 11 species. There were differences in abundance and biomass of species between areas and between seasons of pre-closure, closure and post-closure. Differences for the mean total length of the species were only detected between the pre-closed and closed seasons in one area. This study evidenced the strong relationship between L. dominicanus and the shrimp trawl fishery, the species composition identified in the pellets and their respective morphometric measurements follow the same pattern of the literature for fish discarded in trawling activities.

scholarly journals Can Catch Shares Reduce the US Federal Deficit?

2010 ◽  
Vol 3 (4) ◽  
Author(s):  
Dietmar Grimm ◽  
Judd Boomhower ◽  
Jason Blau
Keyword(s):  
Catch Shares ◽  
Federal Deficit ◽  
The Us

scholarly journals Use of avoidance behaviours to reduce the economic impacts of the EU Landing Obligation: the case study of a mixed trawl fishery

2019 ◽  
Vol 76 (6) ◽  
pp. 1554-1566
Author(s):  
Fabien Pointin ◽  
Fabienne Daurès ◽  
Marie-Joëlle Rochet
Keyword(s):  
Temporal Distribution ◽  
Grid Method ◽  
Fishing Effort ◽  
Economic Losses ◽  
Otter Trawl ◽  
Trawl Fishery ◽  
Nested Grid ◽  
Fishing Practices ◽  
The Eu

Abstract The EU Landing Obligation (LO) is designed to reduce bycatch (i.e. unwanted catch) through more selective fishing practices, such as avoidance behaviours which consist in allocating fishing effort to other species, fishing grounds or seasons. Incentives for fishers to change their behaviours depend on their economic performances as well as their ability to avoid bycatch. Changes in economic performances under the LO are evaluated based on cost and revenue equations. The nested grid method is then used to explore the spatial and temporal distribution of landings and discards, and to suggest alternative effort allocation to avoid bycatch. This article is focussed specifically on the French otter trawl fishery in the eastern English Channel and southern North Sea. Results suggest that under the LO the choke species problem will curtail fishing activities earlier in the year, leading to significant economic losses. In the absence of significant quota top-ups (at least 75%), a change in fishing practices consisting in reducing overall bycatch by 30% is insufficient to reduce losses. With a particular attention to choke species, more economically efficient avoidance strategies can be found thanks to the nested grid method.

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