A spatial multivariate approach to understand what controls species catch composition in small-scale fisheries

2016 ◽  
Vol 175 ◽  
pp. 132-141 ◽  
Author(s):  
M. Grazia Pennino ◽  
Mario J.F. Thomé-Souza ◽  
Adriana R. Carvalho ◽  
Luiz Carlos da Silveira Fontes ◽  
Cristiano Parente ◽  
...  
Keyword(s):  
Small Scale ◽  
Multivariate Approach ◽  
Small Scale Fisheries ◽  
Catch Composition

scholarly journals Experimental evaluation of influence of FADs on community structure and fisheries in coastal Kenya

2018 ◽  
Vol 31 ◽  
pp. 6 ◽  
Author(s):  
Emmanuel K. Mbaru ◽  
Dorcas Sigana ◽  
Renison K. Ruwa ◽  
Elizabeth M. Mueni ◽  
Collins K. Ndoro ◽  
...  
Keyword(s):  
Fish Assemblages ◽  
Small Scale ◽  
Catch Per Unit Effort ◽  
Fish Stocks ◽  
Coastal Fisheries ◽  
Small Scale Fisheries ◽  
Open Sea ◽  
Catch Composition ◽  
Structural Indices ◽  
Fish Aggregating Devices

Fish aggregating devices (FADs) have been widely used by commercial fisheries to increase the catchability of pelagic stocks in the open sea. FADs have the potential to enhance nearshore small-scale fisheries where stocks are often overfished. This study examined changes in catch composition, abundance, catch and effort, and aspects of diversity in Kenya's nearshore coastal fisheries after deployment of anchored fish aggregating devices (AFADs). The study combined both fishery independent and dependent methods in assessing changes in fish assemblages post-deployment. Results showed orders of magnitude increase in length, weight, commercial value, and catch per unit effort (CPUE) of landed catch after deployment of FADs suggesting that FADs had a positive effect on the local fishery. Species richness at FAD sites increased post-deployment (n = 281) compared to pre-deployment values (n = 223). Simultaneous use of several complementary structural indices may be required in order to accurately describe and monitor fish assemblages around the FADs. The findings suggest that AFADs are capable of creating both short and long-term impacts on livelihoods, with the potential to deflect pressure on the overfished nearshore fish stocks. However, more research will be needed on redistribution of fish around FADs, design and placement configuration, and site selection amongst others.

scholarly journals Strategies of the small-scale fisheries on the Central Amazon floodplain

2002 ◽  
Vol 32 (1) ◽  
pp. 101-108 ◽  
Author(s):  
Carlos Edwar de Carvalho FREITAS ◽  
Vandick da Silva BATISTA ◽  
Antonio José INHAMUNS
Keyword(s):  
Hydrological Cycle ◽  
Small Scale ◽  
Good Tool ◽  
Central Amazon ◽  
Small Scale Fisheries ◽  
Fisheries Resources ◽  
Patterns Of Use ◽  
Target Fish ◽  
Catch Composition ◽  
High Level

A multivariate approach was applied to data of small-scale fisheries developed in Central Amazon, using information about catch composition, environment, fishing gear and season of the hydrological cycle. The correspondence analysis demonstrated to be a good tool for the analysis related multispecies fisheries. The analysis identified patterns of use of fisheries resources by the riverine communities, showing the correlation between the environmental factors and the fishing strategy for the capture of target fish species, indicating the high level of empiric knowledge about the environment and fisheries.

scholarly journals FISHING ACTIVITIES AND FISHERMEN INCOME IN RANAU LAKE, SOUTH SUMATRA

2015 ◽  
Vol 21 (1) ◽  
pp. 19
Author(s):  
Dina Muthmainah ◽  
Subagdja Subagdja ◽  
Makri Makri ◽  
Dwi Atminarso ◽  
Safran Makmur
Keyword(s):  
Field Survey ◽  
Small Scale ◽  
Fishing Activity ◽  
Fish Yield ◽  
Field Surveys ◽  
Small Scale Fisheries ◽  
Fish Resources ◽  
Fish Catch ◽  
Catch Composition ◽  
Economical Parameter

Fish resources contribute to the socio-economic development for people who live surrounding the waters. The fishermen of Ranau Lake, South Ogan Komering Ulu Regency, South Sumatra Province and West Lampung Regency, Lampung Province are the prime stakeholder and direct interest in fish resources, because they depend on it for their livelihoods or they are directly involved in its exploitation in some ways. However, to well manage these resources, it needs data and information about fish utilization and fishing activity. The objectives of this work are to assess fishing activities such as the fishing craft and gears, catch composition, fish yield, catch per unit of effort (CPUE) and to estimate the fihermen income with economical parameter such as cost and price. Field surveys were conducted from February to November 2014. Fishing activities data were collected from field survey and interview. The results showed that fish resources utilization in Ranau Lake was categorized as traditional and small scale fisheries using different selective fishing gears such gillnet, harpoon, net trap and basket trap with the fish catch in average of 696.66 g/day; 205.03 g/day; 1.584.06 g/day and 123.67 g/day, respectively. Fisherman income (IDR 2,163,300) means the fishermen in Ranau Lake reach standard Indonesian welfare.

scholarly journals Evaluating the suitability of fyke nets for small-scale fisheries in the Free State Province of South Africa

Water SA ◽  
2020 ◽  
Vol 46 (1 January) ◽  
Author(s):  
LM Barkhuizen ◽  
OLF Weyl
Keyword(s):  
South Africa ◽  
Clarias Gariepinus ◽  
Total Sample ◽  
Free State ◽  
Small Scale ◽  
Catch Per Unit Effort ◽  
Free State Province ◽  
Small Scale Fisheries ◽  
Catch Composition ◽  
Fyke Nets

South Africa is under increasing pressure to develop small-scale fisheries in inland waters. To inform appropriate development of this sector in the Free State Province, the catch rate of double-ended fyke nets was evaluated using survey data from 20 impoundments sampled during the 2013/2014 summer season. Fyke nets were set over night and the total sample effort was 114 fyke net nights. Overall catch per unit effort (CPUE) was 16.8 ± 28.3 kg·net-1·night-1 and catch composition was dependent on impoundment, but generally comprised of a mixture of common carp Cyprinus carpio, African sharptooth catfish Clarias gariepinus, smallmouth yellowfish Labeobarbus aeneus, Orange River mudfish Labeo capensis and moggel Labeo umbratus. The influence of temperature and the potential benefits of baiting the nets were subsequently evaluated through monthly sampling in the hyper-eutrophic Krugersdrift Dam and at the oligotrophic Gariep Dam. Baiting did not significantly influence CPUE, which was significantly higher at Krugersdrift Dam (19.97 ± 23.22 kg·net-1·night-1) than at Gariep Dam (5.02 ± 6.05 kg·net-1·night-1). Increasing temperature had a positive effect on CPUE at Krugersdrift Dam but not at Gariep Dam. Species composition also differed between impoundments and, as a result, we conclude that seasonal catch rates and species compositions will need to be evaluated prior to implementation of fyke net fisheries in specific localities.  

scholarly journals Catch and size selectivity of small-scale fishing gear for the smooth-hound shark Mustelus mustelus (Linnaeus, 1758) (Chondrichthyes: Triakidae) from the Aegean Turkish coast

2010 ◽  
Vol 11 (2) ◽  
pp. 213 ◽  
Author(s):  
T. CEYHAN ◽  
O. HEPKAFADAR ◽  
Z. TOSUNOGLU
Keyword(s):  
Mesh Size ◽  
Catch Rate ◽  
Small Scale ◽  
Fishing Gear ◽  
Size Selectivity ◽  
Small Scale Fisheries ◽  
By Catch ◽  
Catch Composition

Catch rate, CPUE, biomass ratios and size selectivity from traditional longline and trammel nets of Turkish coastal small-scale fisheries were investigated in order to describe the Smooth-hound shark (Mustelus mustelus) fishery. The SELECT method was used to estimate the selectivity parameters of a variety of models for the trammel nets inner panel of 150 and 170 mm mesh sizes. Catch composition and proportion of the species were significantly different in longline and trammel nets. While mean CPUE of longline was 119.2±14.3 kg/1000 hooks, these values for 150 and 170 mm trammel nets were 5.3±1.2 kg/1000 m of net and 12.7±3.9 kg/1000 m of net, respectively. Biomass ratios of the by catch to Smooth-hound catch were found to be 1:0.32 for 150 mm trammel net, 1:0.65 for longline and 1:0.73 for 170 mm trammel net. The estimated modal lengths and spreads were found to be 91.1 and 16.2 cm for 150 mm and 103.2 and 18.4 cm for 170 mm, respectively. The modal lengths of the species as well as the spread values increased with mesh size.

Shark-catch composition and seasonality in the data-poor small-scale fisheries of the southern Gulf of Mexico

2020 ◽  
Vol 71 (9) ◽  
pp. 1182 ◽  
Author(s):  
Juan Carlos Pérez-Jiménez ◽  
Armando Wakida-Kusunoki ◽  
Chrystian Hernández-Lazo ◽  
Manuel Mendoza-Carranza
Keyword(s):  
Additive Model ◽  
Abundant Species ◽  
Small Scale ◽  
Shark Species ◽  
Small Scale Fisheries ◽  
Carcharhinus Leucas ◽  
Southern Gulf Of Mexico ◽  
Fishery Data ◽  
Gravid Females ◽  
Catch Composition

Regional ecological information is relevant to the international management of vulnerable species such as sharks. On the basis of monthly fishery data (2007–2010) from two small-scale multispecies fleets, namely, the bottom longline fleet (MLL) and vertical line+shark-specific longline fleet (VL+SSL) operating on the Campeche Bank, we recorded 19 shark species. The occurrence of immature stages of 15 species, gravid females of Carcharhinus leucas, three Endangered species (Sphyrna mokarran, S. lewini, Isurus oxyrinchus) and three Vulnerable and six Near-threatened species emphasises the importance of this area. Rhizoprionodon terraenovae (42.01% of total abundance), S. lewini (24.82%) and S. tiburo (14.57%) were the most abundant species. The commercial logbooks (2007–2012) for one fleet recorded 6517 for MLL and 1617 for VL+SSL fishery trips. The general additive model indicated a maximum of shark catch rate (CR) for MLL and SSL during 2011 (mean±s.e., 49.94±8.44 and 91.38±16.07kg per 100 hooks respectively). Monthly CR for MLL was highly variable; the maximum was observed in February (15.45±21.43kg per 100 hooks), the maximum monthly CR for SSL was in January (88.04±14.85kg per 100 hooks). For MLL, a positive relation was observed between effort and CR, whereas, for SSL, no clear relation was observed.

scholarly journals Catch per unit effort (CPUE) and catch composition of small scale fisheries in Gökova Bay

2015 ◽  
Vol 32 (3) ◽  
pp. 135-143
Author(s):  
Hakkı Dereli ◽  
Zafer Tosunoğlu ◽  
Huriye Göncüoğlu ◽  
Vahdet Ünal
Keyword(s):  
Small Scale ◽  
Catch Per Unit Effort ◽  
Small Scale Fisheries ◽  
Unit Effort ◽  
Catch Composition

Dysbaric osteonecrosis associated with decompression sickness in a fishing diver

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.

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

2020 ◽  
Vol 12 (5) ◽  
pp. 2026 ◽  
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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