Survey on the Current Status of Small-Scale Artisanal Sea Cucumber Fishing in Kien Giang Province, Vietnam

2020 ◽  
Vol 39 (3) ◽  
Author(s):  
Ly Van Khanh ◽  
Nguyen Thi Ngoc Anh ◽  
Tran Dac Dinh
Keyword(s):  
Sea Cucumber ◽  
Current Status ◽  
Small Scale

scholarly journals Soft bodies make estimation hard: correlations among body dimensions and weights of multiple species of sea cucumbers

2015 ◽  
Vol 66 (10) ◽  
pp. 857 ◽  
Author(s):  
James Prescott ◽  
Shijie Zhou ◽  
Andhika P. Prasetyo
Keyword(s):  
Power Function ◽  
Body Length ◽  
Sea Cucumber ◽  
Dry Weight ◽  
Basic Knowledge ◽  
Small Scale ◽  
Body Width ◽  
Sea Cucumbers ◽  
Body Dimensions ◽  
Wet Weight

Tropical sea cucumbers are commonly exploited by small-scale, poorly managed fisheries. A fundamental problem in managing sea cucumber fisheries is the lack of basic knowledge of important life history characteristics for most species. As a result of plastic body dimensions, biological research on this group of animals becomes exceptionally challenging. To improve our understanding of essential biological parameters, we conducted a study to investigate correlations among various body measurements. We analysed a total of 18 sea cucumber species and more than 6600 individuals collected at Scott Reef in the Timor Sea, north-west Australia. We used hierarchical Bayesian errors-in-variables models to specifically take into account measurement errors that are obviously unavoidable. The measures included three types of weights (wet weight, gutted weight and dry weight) and two body dimensions (length and width). The modelling reveals that using both body length and width as independent variables, wet weight increases approximately linearly with body length, but is a power function (~1.6) of body width, although variability exists among species. Dry weight tends to increase more slowly with body length, but has a similar power function of body width. Linear relationships are established between the three types of weights. On average, ~11% of a live specimen and ~16% of a gutted specimen is processed to the commercially traded dry body wall. Our results can be applied to sea cucumbers in other areas and can be useful for data standardisation and size-based fisheries management.

scholarly journals Small-scale fishing income and fuel consumption: Fiji’s artisanal sea cucumber fishery

2018 ◽  
Vol 75 (5) ◽  
pp. 1758-1767 ◽  
Author(s):  
Steven W Purcell ◽  
Watisoni Lalavanua ◽  
Brian R Cullis ◽  
Nicole Cocks
Keyword(s):  
Gender Equity ◽  
Sea Cucumber ◽  
Large Scale ◽  
Small Scale ◽  
Breath Hold ◽  
Net Income ◽  
Fuel Use ◽  
Sea Cucumbers ◽  
Deep Water Species ◽  
And Gender

Abstract Understanding the income and costs of fishing is fundamental to managing fisheries and planning interventions to improve efficiency and gender equity. Few studies offer data on fisher incomes and fuel use in small-scale fisheries (SSFs), and fewer have assessed factors influencing variation among fishers and between genders. We interviewed 235 artisanal fishers among 34 island villages in an artisanal sea cucumber fishery in Fiji. Linear mixed models were used to determine the effect of geographic and socioeconomic variables on incomes and fuel use from fishing sea cucumbers. Net income of sea cucumbers to fishers, averaging FJ$8, 171 year−1 (US$4, 494 year−1) (range: FJ$0–52,008 year−1), varied among villages and was 47% lower for women than men. On an average, 60% of fishers’ gross annual income came from fishing and selling sea cucumbers, although this proportion varied greatly even within villages. Fishers who practised gleaning, fished less often, or possessing numerous livelihood income streams, were less economically dependent on sea cucumbers. Men tended to estimate higher incomes for an average day of fishing than women when compared with their recall of last sale. Fuel use varied greatly among regions in Fiji but, overall, averaged 428 L fisher−1 year−1, and represented 28% of gross income. More economical fishing strategies by women resulted in lower fuel use than men per fishing day. Breath-hold divers used less fuel (compared to fishers using scuba) and fishers targeting deep-water species used more fuel than other fishers. A best approximation of 8000 t CO2 year−1 for the carbon footprint of the whole fishery suggests that some SSFs, such as the one studied here, can be significant contributors to greenhouse gas emissions, even compared to many large-scale fisheries globally. Reforms to the management of SSFs should consider regulations that minimize carbon emissions and reduce economic dependency on vulnerable marine resources.

scholarly journals Economic Assessment for Harvesting Artisanal Giant Freshwater Prawn from the Sundarban Mangrove Ecosystem in Bangladesh

2019 ◽  
Author(s):  
Biplab Kumar Shaha ◽  
Md. Mahmudul Alam ◽  
H. M. Rakibul Islam
Keyword(s):  
Operating Cost ◽  
Economic Assessment ◽  
Mangrove Ecosystem ◽  
Catch Rate ◽  
Freshwater Prawn ◽  
Current Status ◽  
Small Scale ◽  
Fixed Cost ◽  
Cost Ratio ◽  
Giant Freshwater Prawn

Harvesting Giant Freshwater Prawn, Golda (Macrobrachium rosenbergii de Man 1879) in the Sundarnbans mangrove forest plays an important role in the economy of the country as well as the livelihood of local community. The study focused the economic assessment of small-scale artisanal Golda fishery. Overall the Hookline gear showed the best performance in terms of economic return. However, it was found to withstand a shock from 20% decrease in market prices or 30% fall in catch rate in terms of Return on investment, payback period and Benefit-cost ratio. Operating cost and fixed cost for Hookline fishery was the lowest and Khathijal was the highest. No significant variation (P<0.05) observed in the mean catch rate per trip boat-1 among the gears studied. Total revenue earned after completion a trip varied considerably between BDT 1,307 to 1,562. Yearly, total net revenue reached at the maximum by Hookline (BDT 38,506), followed by Chandijal (BDT 38,377) and the minimum by Khalpata (BDT 33,885). The findings of this study are supposed to be helpful for policy makers in improving the current status of Golda fishery and relevant human livelihood as well as conserving the Sundarbans Mangrove Ecosystem.

scholarly journals The Sea Cucumber Holothuria (Halodeima) atra (Jager, 1833), in South Tarawa Lagoon (Republic of Kiribati): Environmental Variability, Population Biology and Fishing Pressure

2021 ◽  
Author(s):  
◽  
Teatim Tamaroa
Keyword(s):  
Repeated Measures ◽  
Population Biology ◽  
Sea Cucumber ◽  
Environmental Variability ◽  
Preliminary Investigation ◽  
Organic Matter Content ◽  
Biological Data ◽  
Qualitative Assessment ◽  
Current Status ◽  
Fishing Pressure

<p>Holothuria atra or lollyfish is the most common sea cucumber in the Pacific and Indian Oceans. The current status of Holothria atra at 13 sites of South Tarawa lagoon (Republic of Kiribati) was established by using biological surveys and fishers' questionnaires. A preliminary investigation was conducted in order to assess how and why environmental variability and fishing pressure have affected the spatial and temporal distribution, mean abundant and mean size of this species at the sites. The 13 sites were selected randomly, and marked with a GPS on the map of South Tarawa. Sedimentary characteristics were determined for each site, and a qualitative assessment of sites health was made. Lollyfish length, biomass and abundance and transect density were calculated for each site. The weight of organic matter content and size of sediment sample were determined. Data were analysed using Kruskal-Walis (KW) and Repeated measures (RM) ANOVA tests. This thesis shows that the environmental variability could not offer reasons as to why the biological data of lollyfish varied from one site to another. However, other factors that were tested may explain the variation in biological data. Fishing pressure is one of those parameters that can regulate the lollyfish distribution and density and responses from local fishers indicate that fishing pressure is high and that the lollyfish resource is under considerable harvest pressure. Dissolved oxygen concentration in the water column and in the sediment may be also involved in the variation in lollyfish distribution and density but this was not tested. The findings of this research lead to a number of recommendations for the sustainable harvest of lollyfish in Tarawa lagoon. These include consideration of gear restrictions, lollyfish size and number limits, and the establishment of marine protected areas under co-management arrangements.</p>

Microfluidic Applications in Vascular Bioengineering

2011 ◽  
pp. 1-30
Author(s):  
Anand Srinivasan ◽  
José L. López-Ribot ◽  
Anand K. Ramasubramanian
Keyword(s):  
Research Output ◽  
Microfluidic Devices ◽  
New Age ◽  
Current Status ◽  
Small Scale ◽  
Basic Principles ◽  
Microfluidic Flow ◽  
And Control ◽  
Manipulation And Control

Microfluidics is the manipulation and control of fluids in small scale, and has heralded a new age in science as evidenced by the rapid increase in the amount and quality of academic and industrial research output in this area in the recent times. Microfluidics has shown tremendous promise in both fundamental and applied research in the field of vascular bioengineering. In this review, we outline the basic principles of microfluidic flow and fabrication techniques, and describe the recent advances in the applications of microfluidic devices in diagnostic and prognostic vascular bioengineering. The field is still in its infancy and has a great potential for research and development as it matures to deliver commercially viable products. This review, focusing on the current status of microfluidic applications to diagnose and treat blood-related disorders, should be a valuable and opportune addition to the literature of interest to both academia and industry.

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