Characterisation, analysis and catch rates of the small-scale fisheries of the Alicante Gulf (SE Spain) over a 10 years time series

AbstractThere is growing awareness that small-scale fisheries may have large impacts on threatened marine fauna. Bycatch of small cetaceans by the Peruvian small-scale driftnet fleet results in the deaths of thousands of animals annually. We sought to assess the effectiveness of acoustic alarms (pingers) for reducing the incidental capture of dolphins and porpoises by this fleet. Forty-three experimental trips (156 fishing sets) and 47 control trips (195 fishing sets) out of Salaverry Port, northern Peru, were observed from April 2009 to August 2011. Twenty-two percent of control sets captured small cetaceans (67 individuals) and 16% of experimental sets had captures of small cetaceans (33 individuals). The bycatch rate of experimental sets was 0.50 individuals km−2h−1, whereas for control sets the rate was 0.80 individuals km−2h−1. This 37% reduction in bycatch rate suggests that pingers may be effective in reducing the bycatch of small cetaceans in this fishery. Catch rates of the fishery's target shark and ray species were unchanged. Given the vast size of this fishery and its current levels of bycatch of small cetaceans (> 10,000 individuals annually), even the modest declines in bycatch we observed could result in reductions in mortality of hundreds or thousands of small cetaceans per annum. Challenges, including increased costs, to large-scale utilization of pingers have yet to be overcome. The harpooning of dolphins for use as bait will also need to be addressed for further reductions in dolphin and porpoise bycatch and mortality to be achievable.

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PeskAAS: A near-real-time, open-source monitoring and analytics system for small-scale fisheries

PLoS ONE ◽

10.1371/journal.pone.0234760 ◽

2020 ◽

Vol 15 (11) ◽

pp. e0234760

Author(s):

Alexander Tilley ◽

Joctan Dos Reis Lopes ◽

Shaun P. Wilkinson

Keyword(s):

Open Source ◽

Source Monitoring ◽

R Package ◽

Small Island ◽

Small Scale ◽

Small Scale Fisheries ◽

Fish Catch ◽

Catch Rates ◽

Context Specific ◽

Species Specific

Small-scale fisheries are responsible for landing half of the world’s fish catch, yet there are very sparse data on these fishing activities and associated fisheries production in time and space. Fisheries-dependent data underpin scientific guidance of management and conservation of fisheries systems, but it is inherently difficult to generate robust and comprehensive data for small-scale fisheries, particularly given their dispersed and diverse nature. In tackling this challenge, we use open source software components including the Shiny R package to build PeskAAS; an adaptable and scalable digital application that enables the collation, classification, analysis and visualisation of small-scale fisheries catch and effort data. We piloted and refined this system in Timor-Leste; a small island developing nation. The features that make PeskAAS fit for purpose are that it is: (i) fully open-source and free to use (ii) component-based, flexible and able to integrate vessel tracking data with catch records; (iii) able to perform spatial and temporal filtering of fishing productivity by fishing method and habitat; (iv) integrated with species-specific length-weight parameters from FishBase; (v) controlled through a click-button dashboard, that was co-designed with fisheries scientists and government managers, that enables easy to read data summaries and interpretation of context-specific fisheries data. With limited training and code adaptation, the PeskAAS workflow has been used as a framework on which to build and adapt systematic, standardised data collection for small-scale fisheries in other contexts. Automated analytics of these data can provide fishers, managers and researchers with insights into a fisher’s experience of fishing efforts, fisheries status, catch rates, economic efficiency and geographic preferences and limits that can potentially guide management and livelihood investments.

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A time series analysis of Prochilodus nigricans landings caught by small-scale fisheries in the lower stretch of the Amazon River

Brazilian Journal of Biology ◽

10.1590/s1519-69842013000100007 ◽

2013 ◽

Vol 73 (1) ◽

pp. 53-59 ◽

Cited By ~ 1

Author(s):

IF. Santana ◽

CEC. Freitas

Keyword(s):

Time Series ◽

Time Series Analysis ◽

Open Source Software ◽

Age Groups ◽

Small Scale ◽

Amazon River ◽

Small Scale Fisheries ◽

Series Analysis ◽

Using Data ◽

The Right

We developed a time series analysis using data on curimatã (Prochilodus nigricans), which landed in Santarém, a small city located on the right banks of the Amazon River. A 10-year record of monthly average catches per day of P. nigricans was analyzed using forecasting procedures in the open-source software GRETL 1.7.8. We established two models from the identifications made with the correlograms of hyperparametrization and seasonal differences. The autoregressive terms of the model reach three years, indicating that individuals of the species are being caught around the age of three. This may indicate that the curimatãs in the landings at Santarém from 1992 to 2002 were more than two years old, potentially a sign of a lack of fishing pressure on the lower age groups.

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PeskAAS: A near-real-time, open-source monitoring and analytics system for small-scale fisheries

10.1101/2020.06.03.131656 ◽

2020 ◽

Author(s):

Alexander Tilley ◽

Joctan Dos Reis Lopes ◽

Shaun P. Wilkinson

Keyword(s):

Open Source ◽

Source Monitoring ◽

R Package ◽

Small Island ◽

Small Scale ◽

Small Scale Fisheries ◽

Fish Catch ◽

Catch Rates ◽

Context Specific ◽

Species Specific

AbstractSmall-scale fisheries are responsible for landing half of world’s fish catch, yet there are very sparse data on these fishing activities and associated fisheries production in time and space. Fisheries-dependent data underpin scientific guidance of management and conservation of fisheries systems, but it is inherently difficult to generate robust and comprehensive data for small-scale fisheries, particularly given their dispersed and diverse nature. In tackling this challenge, we use open source software components including the Shiny R package to build PeskAAS; an adaptable and scalable digital application that enables the collation, classification, analysis and visualisation of small-scale fisheries catch and effort data. We piloted and refined this system in Timor-Leste; a small island developing nation. The features that make PeskAAS fit-for-purpose are that it is: (i) fully open-source and free to use (ii) component-based, flexible and able to integrate vessel tracking data with catch records; (iii) able to perform spatial and temporal filtering of fishing productivity by fishing method and habitat; (iv) integrated with species-specific length-weight parameters from FishBase; (v) controlled through a click-button dashboard, that was co-designed with fisheries scientists and government managers, that enables easy to read data summaries and interpretation of context-specific fisheries data. With limited training and code adaptation, the PeskAAS workflow has been used as a framework on which to build and adapt systematic, standardised data collection for small-scale fisheries in other contexts. Automated analytics of these data can provide fishers, managers and researchers with insights into a fisher’s experience of fishing efforts, fisheries status, catch rates, economic efficiency and geographic preferences and limits that can potentially guide management and livelihood investments.

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Competition between static gear of the small-scale fisheries in Algarve waters (southern Portugal)

Mediterranean Marine Science ◽

10.12681/mms.74 ◽

2010 ◽

Vol 11 (2) ◽

pp. 225 ◽

Cited By ~ 4

Author(s):

K. ERZINI ◽

J.M.S. GONCALVES ◽

L. BENTES ◽

P.G. LINO ◽

J. RIBEIRO ◽

...

Keyword(s):

Species Composition ◽

Fishing Effort ◽

Small Scale ◽

Gill Nets ◽

Scarce Resources ◽

Small Scale Fisheries ◽

Southern Portugal ◽

Catch Rates ◽

One Year ◽

And Control

Parallel fishing trials with 0.30 mm diameter monofilament gill nets and longlines using small hooks were carried out in the Algarve (southern Portugal) over a one-year period, 1997-1998, with the objective of comparing species composition, catch rates, discards and size ranges. Four hook sizes of 'Mustad' brand, round bent, flatted sea hooks (numbers 15, 13, 12 and 11) and four mesh sizes of 25, 30, 35 and 40 mm (nominal bar length) of gill nets were used in the trials. Overall, 84 species were caught, with gill nets taking 71 species and longlines 54 species and with 41 species caught by both gears. The amount of discarding was higher for gill nets than for longlines. The catch species composition differed between the two gears, with the commercially valuable sea breams dominating the longline catches whereas small pelagics were relatively more important in the gill nets. Multivariate analysis showed a clear separation between the different sizes of the two gears both in terms of numbers and weights per species. Algarve gill netters and longliners fish the same species assemblage on the same fishing grounds, but have clearly different impacts in terms of catch species composition, catch rates and sizes. This information will be useful for the improved management of these small-scale, multi-species, multi-gear fisheries, where different gears compete for scarce resources. In particular this study provides a basis for a more rational allocation of licenses and control of fishing effort.

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The Mobilization of Small Scale Fisheries Community with Knowledge Management for Conservation and Restoration of the Marine and Coastal Resources in the Gulf of Thailand, Songkhla Province

SSRN Electronic Journal ◽

10.2139/ssrn.3546282 ◽

2019 ◽

Author(s):

Sayan Thongsri ◽

Wannee Niamhom ◽

Sunti Srisuantaeng

Keyword(s):

Knowledge Management ◽

Small Scale ◽

Gulf Of Thailand ◽

Coastal Resources ◽

Small Scale Fisheries ◽

The Gulf Of Thailand

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Dysbaric osteonecrosis associated with decompression sickness in a fishing diver

Undersea and Hyperbaric Medicine ◽

10.22462/04.06.2019.17 ◽

2019 ◽

pp. 217-220

Author(s):

Eduardo Briceño-Souza ◽

◽

Nina Méndez-Domínguez ◽

Ricardo j Cárdenas-Dajda ◽

Walter Chin ◽

...

Keyword(s):

Femoral Head ◽

Decompression Sickness ◽

Small Scale ◽

Prior History ◽

Radiological Findings ◽

Small Scale Fisheries ◽

Left Limb ◽

History Of ◽

Decompression Stress ◽

Probable Diagnosis

Diving as a method of fishing is used worldwide in small-scale fisheries. However, one of the main causes of morbidity and mortality among fishermen is decompression sickness (DCS). We report the case of a 46-year-old male fisherman diver who presented with chronic inguinal pain that radiated to the lower left limb. Living and working in a fishing port in Yucatan, he had a prior history of DCS. A diagnosis of avascular necrosis in the left femoral head secondary to DCS was made via analysis of clinical and radiological findings. The necrosis was surgically resolved by a total hip arthroplasty. Dysbaric osteonecrosis is a more probable diagnosis. In this region fishermen undergo significant decompression stress in their daily fishing efforts. Further studies regarding prevalence of dysbaric osteonecrosis among small-scale fisheries divers are needed. In a community where DCS is endemic and has become an epidemic, as of late, the perception of this health risk remains low. Furthermore, training and decompression technique are lacking among the fishing communities.

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Fisheries Sustainability through Soft Multi-Use Maritime Spatial Planning and Local Development Co-Management: Potentials and Challenges in Greece

Sustainability ◽

10.3390/su12052026 ◽

2020 ◽

Vol 12 (5) ◽

pp. 2026 ◽

Cited By ~ 4

Author(s):

Stella Sofia I. Kyvelou ◽

Dimitrios G. Ierapetritis

Keyword(s):

Spatial Planning ◽

Local Development ◽

Small Scale ◽

Artisanal Fisheries ◽

Sustainable Livelihood ◽

Small Scale Fisheries ◽

Island Communities ◽

The Mediterranean ◽

Family Based ◽

Maritime Spatial Planning

Small-scale fisheries in the Mediterranean represent a significant part of the fisheries industry and their substantial social, economic and place attachment related role has always been acknowledged in the region. Despite the fact that this usually family-based endeavor has a vast economic impact on coastal and island communities of the sea-basin, data and insights on the Mediterranean artisanal fisheries continue to be inadequately developed and poorly integrated in the local development strategies. Thus, the aim of this research is two-fold. Firstly, it presents some data and facts on the fisheries sector in the region and secondly it explores the options of their survival, prosperity and sustainability, approaching the combination of fisheries and tourism as a small-scale and soft “multi-use” in the marine space. Greece, with a huge potential in both the fisheries and the tourism sector, was used as focus area where a co-development process was designed aiming to identify advantages/potentials and challenges/disadvantages of the co-existence of artisanal fisheries and tourism, as perceived by a series of stakeholders including the co-management schemes (Fisheries Local Action Groups, FLAGs) in the country. Key conclusion is that sustainable livelihood from small-scale fisheries depends on the correlation between fisheries and other marine activities. Despite some limitations, this can boost sustainable local development and be a unique pattern of a “win-win” and soft multi-use marine spatial planning (MSP), with economic, environmental, social, cultural and governance related benefits for the coastal communities.

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