scholarly journals Scottish Inshore Fisheries Integrated Data System (SIFIDS): work package (2) final report WP2A: development and pilot deployment of a prototypic autonomous fisheries data harvesting system, and WP2B: investigation into the availability and adaptability of novel technological approaches to data collection

2019 ◽  
Author(s):  
R. Ayers ◽  
G.P. Course ◽  
G.R. Pasco
Keyword(s):  
Data Collection ◽  
Economic Value ◽  
Fishing Effort ◽  
Final Report ◽  
Executive Summary ◽  
Fishing Activity ◽  
Business Decisions ◽  
Fishing Vessels ◽  
Spatio Temporal ◽  
Data Deficient

[Extract from Executive Summary] To enhance sustainability and foster resilience within Scotland’s inshore fishing communities an effective system of collecting and sharing relevant data is required. To support business decisions made by vessel owners as well as informing fisheries managers and those involved in marine planning it will be vital to collect a range of information which will provide a robust understanding of fishing activity, the economic value of the sector and its importance within local communities. The SIFIDS Project was conceived to assist in attaining these goals by working alongside fishers to develop and test technology to automatically collect and collate data on board vessels, thereby reducing the reporting burden on fishers. The project built upon previous research funded through the European Fisheries Fund (EFF) and was designed to deliver a step change in the way that inshore fisheries in Scotland could be managed in cooperation with the industry. The project focussed on inshore fishing vessels around Scotland, where spatio-temporal information on the distribution of vessels and associated fishing effort is data deficient. The whole project was broken down into 12 highly integrated work packages. This is the integrated report for work packages 2A and 2B, entitled’ Development and Pilot Deployment of a Prototypic Autonomous Fisheries Data Harvesting System’ (2A) and ‘Investigation into the Availability and Adaptability of Novel Technological Approaches to Data Collection’ (2B).

scholarly journals Estimating Fishing Effort and Spatio-Temporal Distribution of Longline Vessels in the Indian Ocean

2021 ◽  
Vol 8 ◽  
Author(s):  
Febrianto W. Utama ◽  
Xavier Hoenner ◽  
Britta Denise Hardesty ◽  
David Peel ◽  
Jessica H. Ford ◽  
...  
Keyword(s):  
Indian Ocean ◽  
Temporal Distribution ◽  
Fishing Effort ◽  
Fishing Activity ◽  
Widespread Occurrence ◽  
Fisheries Resources ◽  
Spatial Shift ◽  
Landing Sites ◽  
The Indian Ocean ◽  
Spatio Temporal

Protein from fish is essential for feeding the world’s population and is increasingly recognized as critical for food security. To ensure that fisheries resources can be sustainably maintained, fisheries management must be appropriately implemented. When logbook and landing records data are not complete or are incorrect, it is challenging to have an accurate understanding of catch volume. Focusing on Indonesian longline vessels operating in the Indian Ocean from 2012–2019 (n = 1124 vessels), our aims were to (1) assess compliance through identification of landing sites and potentially illicit behavior inferred by interruptions in VMS transmission, and (2) understand how the fishery operates along with quantifying the spatio-temporal distribution of fishing intensity by applying a Hidden Markov Model, which automatically classified each VMS position as fishing, steaming and anchoring. We found vessel compliance gaps in 90% of vessels in the dataset. Compliance was questionable due both to the widespread occurrence of long intermissions in relaying VMS positions (mean = 17.8 h, n = 973 vessels) and the use of unauthorized landing sites. We also observed substantial changes in fishing effort locations among years. The introduction of regulatory measures during the study period banning transshipment and foreign vessels may be responsible for the spatial shift in fishing activity we observed, from encompassing nearly the whole Indian Ocean to more recent intense efforts off western Sumatra and northern Australia.

scholarly journals Fishing for euros: how mapping applications can assist in maintaining revenues under the Landing Obligation

2020 ◽  
Author(s):  
Julia Calderwood ◽  
Kristian Schreiber Plet-Hansen ◽  
Clara Ulrich ◽  
David G Reid
Keyword(s):  
Temporal Dynamics ◽  
Species Distributions ◽  
Fishing Effort ◽  
Fishing Industry ◽  
Fishing Activity ◽  
Spatio Temporal ◽  
Catch Rates ◽  
Demersal Species ◽  
High Catch

Abstract With the introduction of the Landing Obligation (LO) in EU fisheries, there is an increasing need for fishers to avoid unwanted catches while maximizing revenues. Improving understanding of the spatio-temporal dynamics of unwanted catches could assist the fishing industry optimize catches by altering where they fish. How following such advice relates to revenues and fishery dynamics requires more consideration. We take an existing hotspot mapping methodology and examine how it could be used to identify fishing opportunities under the LO in Irish (Celtic Sea) and Danish (North Sea and Skagerrak) demersal fisheries. We consider if fishing effort can be relocated to avoid unwanted catches while maintaining revenues. The value per unit effort of fishing activity in both areas was often linked to high catch rates of key demersal species (cod, haddock, hake, and whiting). Our analyses indicated, however, that there are options to fish in areas that could provide higher revenues while avoiding below minimum conservation reference size catches and choke species. This was evident across both case study areas demonstrating that hotspot mapping tools could have wide applicability. There does, however, remain a need to explore how the displacement of vessels may further alter species distributions and fleet economics.

scholarly journals Taking full advantage of the diverse assemblage of data at hand to produce time series of abundance. A case study on Atlantic salmon populations of Brittany

2021 ◽  
Author(s):  
Clément Lebot ◽  
Marie-Andrée Arago ◽  
Laurent Beaulaton ◽  
Gaëlle Germis ◽  
Marie Nevoux ◽  
...  
Keyword(s):  
Time Series ◽  
Data Collection ◽  
Atlantic Salmon ◽  
Full Advantage ◽  
Fishing Effort ◽  
Clear Trend ◽  
Multiple Data ◽  
Spatio Temporal ◽  
Catch Statistics ◽  
Transfer Of Information

Estimation of abundance with wide spatio-temporal coverage is essential to the assessment and management of wild populations. But, in many cases, data available to estimate abundance time series have diverse forms, variable quality over space and time and they stem from multiple data collection procedures. We developed a Hierarchical Bayesian Modelling (HBM) approach that take full advantage of the diverse assemblage of data at hand to estimate homogeneous time series of abundances irrespective of the data collection procedure. We apply our approach to the estimation of adult abundances of 18 Atlantic salmon populations of Brittany (France) from 1987 to 2017 using catch statistics, environmental covariates and fishing effort. Additional data of total or partial abundance collected in 4 closely monitored populations are also integrated into the analysis. The HBM framework allows the transfer of information from the closely monitored populations to the others. Our results reveal no clear trend in the abundance of adult returns in Brittany over the period studied.

scholarly journals PENINGKATAN KINERJA SISTEM PROPULSI KAPAL PENANGKAP IKAN TRADISIONAL TYPE PURSEINE 30 SD 90 GT MENGGUNAKAN SISTIM PROPULSI HYBRID

2011 ◽  
Vol 16 (2) ◽  
pp. 106
Author(s):  
Mohd Ridwan
Keyword(s):  
Economic Value ◽  
Motor Fuel ◽  
Cost Savings ◽  
Fishing Effort ◽  
Propulsion Systems ◽  
Hybrid Propulsion ◽  
Ship Propulsion ◽  
Fishing Vessels ◽  
Main Engine ◽  
Traditional Fishing

Mohd Ridwan, in this paper explain that traditional fishing vessels built in the shipyard of the people is a cultural heritage which needs to be conserved, and empowered through the application of ship science and technology to build fishing boats for fishermen of all types, shapes and sizes of ships, equipped with fishing technology. Repairs to the feasibility of traditional fishing vessels to sail like stability, ship construction needs to be done. Similarly, his case should be applied to ship propulsion technology that remained operational needs based on size of vessel forms and types of fishing vessels. The design of an appropriate propulsion can provide benefits in the form of operational cost savings by more than 10% through the use of hybrid propulsion systems. Hybrid propulsion system is a mix of main engine (motor fuel or gas fuel MDO) with electric motor and propeller to suit the use of hull form and ship propulsion systems (matching the propeller and engine) is at the core of this concept in this article and next to be research. Besides these traditional ship the product to be supported primarily by imposing government standards for a fishing vessel, for fishermen as users can easily calculate the economic value of investment will they planted in fishing effort at sea. Keywords : Fishing Boat Traditional, Hybrid Propulsion, Main Engine, Propeller, Operatinal Cost.

scholarly journals Scottish Inshore Fisheries Integrated Data System (SIFIDS): work package (8) final report WP8A: on-board observers, and WP8B: final report identifying fishing activities and their associated drivers

2018 ◽  
Author(s):  
Grant P. Course ◽  
◽  
Grant R. Pasco ◽  
Ashley Royston ◽  
Richard Ayers ◽  
...  
Keyword(s):  
Spatial Data ◽  
Data System ◽  
Final Report ◽  
Commercial Fishing ◽  
Work Package ◽  
Executive Summary ◽  
Fishing Vessels ◽  
Evidence Gathering ◽  
Temporal And Spatial ◽  
Trained Observers

[Extract from Executive Summary] The Scottish Inshore Fisheries Integrated Data System (SIFIDS) project aims to build on the success of a previous project called “Evidence Gathering in Support of Sustainable Scottish Inshore Fisheries”, which utilised temporal and spatial data collected from commercial fishing vessels in cooperation with the fishing industry. The On-Board Observer work package (WP8A) aimed to collect the raw data that could be used by the other work packages (WPs) by sending observers to sea. SeaScope Fisheries Research Ltd was tasked with providing trained observers and a total of 131 volunteer vessels were recruited to the project by the Facilitators (WP7) and observers.

scholarly journals Scottish Inshore Fisheries Integrated Data System (SIFIDS): work package 6 final report development of a pilot relational data resource for the collation and interpretation of inshore fisheries data

2019 ◽  
Author(s):  
Alexander N. Tidd ◽  
◽  
Richard A. Ayers ◽  
Grant P. Course ◽  
Guy R. Pasco ◽  
...  
Keyword(s):  
Data Storage ◽  
Electronic Monitoring ◽  
Project Work ◽  
Final Report ◽  
Data Sets ◽  
Work Package ◽  
Executive Summary ◽  
Data Resource ◽  
Fishing Vessels ◽  
Fishing Fleets

[Extract from Executive Summary] The competition for space from competing sectors in the coastal waters of Scotland has never been greater and thus there is a growing a need for interactive seascape planning tools that encompass all marine activities. Similarly, the need to gather data to inform decision makers, especially in the fishing industry, has become essential to provide advice on the economic impact on fishing fleets both in terms of alternative conservation measures (e.g. effort limitations, temporal and spatial closures) as well as the overlap with other activities, thereby allowing stakeholders to derive a preferred option. The SIFIDS project was conceived to allow the different relevant data sources to be identified and to allow these data to be collated in one place, rather than as isolated data sets with multiple data owners. The online interactive tool developed as part of the project (Work Package 6) brought together relevant data sets and developed data storage facilities and a user interface to allow various types of user to view and interrogate the data. Some of these data sets were obtained as static layers which could sit as background data e.g. substrate type, UK fishing limits; whilst other data came directly from electronic monitoring systems developed as part of the SIFIDS project. The main non-static data source was Work Package 2, which was collecting data from a sample of volunteer inshore fishing vessels (<12m). This included data on location; time; vessel speed; count, time and position of deployment of strings of creels (or as fleets and pots as they are also known respectively); and a count of how many creels were hauled on these strings. The interactive online tool allowed all the above data to be collated in a specially designed database and displayed in near real time on the web-based application.

scholarly journals In the Wrong Place at the Wrong Time: Identifying Spatiotemporal Co-occurrence of Bycaught Common Dolphins and Fisheries in the Bay of Biscay (NE Atlantic) From 2010 to 2019

2021 ◽  
Vol 8 ◽  
Author(s):  
Helene Peltier ◽  
Matthieu Authier ◽  
Florence Caurant ◽  
Willy Dabin ◽  
Pierre Daniel ◽  
...  
Keyword(s):  
Atlantic Coast ◽  
Sea Bass ◽  
Fishing Effort ◽  
Small Scale ◽  
Common Dolphin ◽  
Bay Of Biscay ◽  
The European Union ◽  
Fishing Activity ◽  
Fishing Vessels ◽  
Common Dolphins

The first Unusual Mortality Event (UME) related to fishing activity along the Atlantic coast recorded by the French Stranding Network was in 1989: 697 small delphinids, mostly common dolphins, washed ashore, most of them with evidence of having been bycaught. Since then, UMEs of common dolphins have been observed nearly every year in the Bay of Biscay; unprecedented records were broken every year since 2016. The low and unequally distributed observation efforts aboard fishing vessels in the Bay of Biscay, as well as the lack of data on foreign fisheries necessitated the use of complementary data (such as stranding data) to elucidate the involvement of fisheries in dolphin bycatch. The aim of this work was to identify positive spatial and temporal correlations between the likely origins of bycaught stranded common dolphins (estimated from a mechanistic drift model) and fishing effort statistics inferred from Vessel Monitoring System (VMS) data on vessels &gt;12 m long. Fisheries whose effort correlated positively with dolphin mortality areas after 2016 included French midwater trawlers, French Danish seiners, French gillnetters, French trammel netters, Spanish bottom trawlers, and Spanish gillnetters. For the French fleet only, logbook declarations, sales, and surveys carried out by Ifremer were integrated into fishing effort data. Six fleets were active in common dolphin bycatch areas at least twice between 2016 and 2019: gillnetters fishing hake, trammel netters fishing anglerfish, bottom pair trawlers fishing hake, midwater pair trawlers fishing sea bass and hake, and Danish seiners fishing whiting. Except for changes in hake landings in some fisheries, there were no notable changes in total fishing effort practice (gear or target species) based on the data required by the ICES and Council of the European Union that could explain the large increase in stranded common dolphins recorded along the French Atlantic coast after 2016. Small scale or unrecorded changes could have modified interactions between common dolphins and fisheries, but could not be detected through mandatory data-calls. The recent increase in strandings of bycaught common dolphins could have been caused by changes in their distribution and/or ecology, or changes in fishery practices that were undetectable through available data.

Throwing light on straddling stocks of Illex argentinus: assessing fishing intensity with satellite imagery

2002 ◽  
Vol 59 (4) ◽  
pp. 592-596 ◽  
Author(s):  
C M Waluda ◽  
P N Trathan ◽  
C D Elvidge ◽  
V R Hobson ◽  
P G Rodhouse
Keyword(s):  
Satellite Imagery ◽  
Fishing Effort ◽  
Comprehensive Analysis ◽  
Falkland Islands ◽  
Fishing Activity ◽  
Fishing Vessels ◽  
Political Boundaries ◽  
Innovative Tool ◽  
Illex Argentinus ◽  
High Seas

Marine fisheries provide around 20% of animal protein consumed by man worldwide, but ineffective management can lead to commercial extinction of exploited stocks. Fisheries that overlap nationally controlled and high seas waters cause particular problems, as few management data are available for the high seas. The Argentinean short-finned squid, Illex argentinus, exemplifies such a "straddling stock". Here we demonstrate that light emitted by fishing vessels to attract squid can be detected via remote-sensing. Unlike conventional fisheries data, which are restricted by political boundaries, satellite imagery can provide a synoptic view of fishing activity in both regulated and unregulated areas. By using known levels of fishing effort in Falkland Islands waters to calibrate the images, we are able to estimate effort levels on the high seas, providing a more comprehensive analysis of the overall impact of fishing on the stock. This innovative tool for quantifying fishing activity across management boundaries has wide-ranging applications to squid fisheries worldwide.

scholarly journals Scottish Inshore Fisheries Integrated Data System (SIFIDS): work package 8B final report identifying fishing activities and their associated drivers

2019 ◽  
Author(s):  
Tania Mendo ◽  
◽  
Sophie Smout ◽  
Johanna Ransijn ◽  
Ian Durbach ◽  
...  
Keyword(s):  
Biological Data ◽  
Data System ◽  
Environmental Data ◽  
Final Report ◽  
Economic Data ◽  
Work Package ◽  
Nephrops Norvegicus ◽  
Executive Summary ◽  
Fishing Activity ◽  
Cancer Pagurus

[Extract from Executive Summary] This Work Package (WP8B) of the SIFIDS project focused on vessels that are 12 m or under in length, use static gear (pots or creels), and primarily target lobsters (Homarus gammarus), crabs (Cancer pagurus and Necora puber), and prawns (Nephrops norvegicus). WP8B had two principal objectives: 1. Identify fishing activity profiles for static gear vessels in the inshore fleet prosecuting lobsters, crabs and nephrops. 2. Incorporate effort, biological data, socio-economic data, environmental data to understand fishing behaviour

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