Prawn Fish Research Articles

An Analysis of Marketing Cost, Producer’s Share in Consumer’s Rupee and Market Efficiency of Marketing Channel of Prawn Fish in District Rohtak, Haryana

An Analysis of Marketing Cost, Producer’s Share in Consumer’s Rupee and Market Efficiency of Marketing Channel of Prawn Fish in District Rohtak, Haryana

An economic analysis of cost, return per quintal and Input-output ratio of prawn farming in district Rohtak (Haryana), India

The study was to determine an economic analysis of prawn fish (Shrimp). The Multi-Stage Sampling Procedure was followed in sample. In first stage - selection of district, second stage - selection of block, third stage- selection of villages and fourth stage – selection of respondents. In district Rohtak; name of selected village’s viz. Anwal, Bahuakbarpur, Kalanaur and Lahli. The primary data was collected through pre-determined questionnaire and secondary data collected from different sources related to study area. The sample was taken purposively for the present study on the basis of highest production. Collected data are summarized, analyzed, and tabulated that helped to find a significant mean of study. Statistical and analytical tools were also used in the study. The present study revealed that average variable cost was Rs.1157367.95/ha, average of overhead cost was Rs.115183.85/ha and average of total cost was Rs.1272551.35/ha. The average cost of production was Rs.1399806.48. An average cost A, cost B and cost C was Rs.1255659.83, Rs.1267454.91 and 1272551.35 per ha respectively. An average yields was 67 qtl. per ha. The average gross farm income was Rs.1876000 and average net farm return was Rs.476193.52 per ha. An average return per quintal was Rs.7078.90 per ha. An average of input – output ratio was Rs.1:1.34.

Computational study of Richness and Diversity Indices of fish species in rivers and other wetland areas and fish marketplaces under Kurigram District, Banglades

The present study revealed that a total of 101 indigenous species of large fish (28 species) and Small Indigenous fish (73 species) belonging to 63 genera and 31 families were observed and identified while 17 exotic fish species were found under 5 families. Among the indigenous species, the highest number of species were found in family Cyprinidae and Bagridae with a relative diversity of 28.28% and 11.11%. In case of group species richness, highest number 27 fish species were found in catfish group followed by 12 species of carp, 8 species of each barbs and minnows, 6 species of eel fish, 8 species of loaches, 4 species of each prawn, snake-headed or airbreathing fish and glass perches, 3 species of each climbing perches and clupeid, 2 species of each goby fish, knifefish and puffer fish, and rest of the group true perch, leaf fish, halfbeak fish, Needlefish, mullet fish, anchovies and killifish has one species. Of the total species, 47 species were considered as least concerned, 10 species as vulnerable, 11 species as endangered, 11 species as critically endangered, 14 species as nearly threatened and 8 species as data deficient. Considering the seasonal variation for all selected areas simultaneously, Shannon-Weaver diversity (H) index were found ranged from 3.53 (May) to 4.37 (January) where the highest Shannon -Weaver diversity index value 4.37 were found in winter season while 3.01 in Phulkumar, 3.73 in Dudhkumar, 3.87 in Dharla, 3.67 in Tista and 3.79 in Brahmaputra were recorded separately.

LENGTH-WEIGHT RELATIONSHIP OF THE SIX MOST ABUNDANT FISH SPECIES IN PRAWN FISHERY SEMI-FIXED TRAP BYCATCHES IN THE LOWER AMAZON REGION (PARÁ, BRAZIL)

In this study, the length-weight relationships (LWR) were estimated for six fish species captured during prawn fishing in the Lower Amazon region (Pará, Brazil). Prawn fishing boosts the socioeconomic development of riverine communities and is a relevant activity as a source of income and subsistence in this region. In addition, we registered new LWRs for the species Ossancora punctata and Hypoptopoma elongatum. The samplings were performed in prawn catches monthly from February 2018 to January 2019, using a "matapi" which consists of a semiâ€"˜fixed trap that has a galvanized iron structure (2.5 m height by 2.0 m in length) and nylon mesh (1.40 x 1.60 mm mesh), and has two tapered openings to facilitate the entry and trapping of the prawn. The results show that 75% of the fish caught as prawn bycatches had not yet reached sexual maturity. Thus, it is clear that fisheries need to develop fishing gear that allow small fish to escape from the traps during the prawn fishery.

Sustainability of Orange Roughy Population

This article describes Holling type-III two-prey one-predator fishery model with harvesting and toxicity in unreserved area. Orange roughy is the predator species with prawn and small fish as prey species. Firstly, boundedness of the model has been examined. Existence of interior equilibrium point has been analyzed. Then sufficient conditions of permanence and extinction of populations have been obtained. It has been noted that very high rate of harvesting and toxicity are the main reasons of species like orange roughy being at the edge of extinction. But as per human need, some amount of harvesting is important. Keeping this in mind, we have reserved them with their main prey species, prawn and small fish, in a protected area where harvesting is not allowed and toxicity is ignorable. Using Pontryagin’s maximum principle, we have derived the optimal value of control parameter (partial closure m), for which total discounted net revenue gets maximized. Then we have investigated the sufficient condition for which the net revenue gets maximized and the orange roughy species can survive in future. Finally our analytical results have been verified by numerical simulation using MATLAB.

Improving fleet efficiency to maximise economic yield in a Western Australian prawn fishery

The Shark Bay trawl fishery is Western Australia's most valuable prawn fishery (worth AUD$25 million in 2014). The 18-vessel fleet targets western king prawns (Penaeus latisulcatus), brown tiger prawns (P. esculentus) and also retains saucer scallops (Ylistrum balloti) and blue swimmer crabs (Portunus armatus). Increased fuel prices, falling prawn prices and lower catches of other species, following extreme environmental events, have impacted fishery profits. A biomass dynamics model with an economic component indicated that total revenue levels start to decline when annual effort increases beyond ~ 200 fishing days per boat. Annual effort required to achieve MEY, when based solely on prawn fishing, is 115–150 days per boat after accounting for fixed and variable fishing costs and annual fishing efficiency increases of 1–2%. From 2007–2014, the adjusted effort was 188–192 days per boat. Fishing occurred between March and November during 7–8 fishing periods, separated by 5–8day (low catchability) moon closure periods. An empirical daily profit assessment (2007–2015), accounting for recruitment variation, daily prawn size compositions, monthly market prices for different prawn species and sizes, and daily fishing costs, showed vessels made profits on ~ 115–160 days and losses on ~ 15–55 days per year, when fishing occurred near the full moon. The fishery benefitted in 2013–2015 by starting later in the year and better targeting within-season effort. This management strategy within the effort-control framework, which improved profitability, maintained higher spawning stocks and reduced ecosystem fishing impacts, has wider application in prawn fishery management.

Coastal to inland: Expansion of prawn farming for adaptation to climate change in Bangladesh

The practice of prawn (Macrobrachium rosenbergii) farming is widespread in coastal Bangladesh due to favorable biophysical resources. However, export-oriented prawn farming is particularly vulnerable to climate change in coastal Bangladesh. This study identified different climatic variables, including salinity, coastal flooding, cyclone, sea-level rise, water temperature, drought, and rainfall have profound effects on prawn farming in the Bagerhat area of southwest Bangladesh. Considering extreme vulnerability to the effects of climate change on prawn production, one of the adaptation strategies is to translocate prawn culture from coastal to inland (i.e., Bagerhat–Gopalganj) that appear less vulnerable to climate change. Although the prospects for prawn–carp polyculture and integrated prawn–fish–rice farming are positive in Gopalganj, a number of challenges were identified for the expansion of prawn culture. We suggest that institutional support would help to adopt prawn production.

BENEFITS OF MANGROVE MANAGEMENT FOR PRAWN FISHING AND TIMBER PRODUCTION

Integrated fisheries resource management is absolutely needed to achieve optimal result and sustainable utilization. This research aims to analyze the benefit of mangrove forest management for prawn fishing and mangrove timber production in Segara Anakan, southern coast of Central Java. The information concerning mangrove coverage changes was achieved from a satellite imagery (Landsat) from 2002 to 2009, while prawn resources stock assessment was analyzed through production surplus method and economic analysis of prawn fishing. The results show that the condition of mangrove ecosystem in Segara Anakan since 2002 to 2009 had been decreasing with average decrease rate of 10,28% each year which caused to prawn abundance. Utilization of mangrove wood inwhich aged above 20 years would give more benefit to prawn fishing and timber production. The additional economic value for prawn fishing was approximately 3,964 times of cropped woods. Prawn fisheries resource management in Cilacap coastal waters could be done by management of fishing effort and rehabilitation of mangrove forest in Cilacap region and surrounding areas as well especially in Segara Anakan Lagoon.

Community‐based climate change adaptation strategies for integrated prawn–fish–rice farming in Bangladesh to promote social–ecological resilience

AbstractFarming freshwater prawns with fish in rice fields is widespread in the coastal region of southwest Bangladesh because of favourable resources and ecological conditions. This article provides an overview of an ecosystem‐based approach to integrated prawn–fish–rice farming in southwest Bangladesh. The practice of prawn and fish farming in rice fields is a form of integrated aquaculture–agriculture, which provides a wide range of social, economic and environmental benefits. Integrated prawn–fish–rice farming plays an important role in the economy of Bangladesh, earning foreign exchange and increasing food production. However, this unique farming system in coastal Bangladesh is particularly vulnerable to climate change. We suggest that community‐based adaptation strategies must be developed to cope with the challenges. We propose that integrated prawn–fish–rice farming could be relocated from the coastal region to less vulnerable inland areas, but caution that this will require appropriate adaptation strategies and an enabling institutional environment.

Isolation of Serratia marcescens SR1 as a Source of Chitinase Having Potentiality of Using as a Biocontrol Agent.

Serratia marcescens, strain SR(1) was isolated from the local soil of a cultivated farm and it was screened as potent strain for chitinase production. Maximum chitinase production (77.3uMh(-1)100(-1)) was observed after 96h of incubation period with pH 5.5 at 30°C under shake conditions (120rpm). Compare to still flasks, shake culture with prawn fish colloidal chitin of 0.5% (w/v) concentration, showed a better enzyme yield. Crude enzyme showed antifungal activity against plant pathogens.

Relationship to the River: The Case of the Muar River Community

Problem statement: Muar River which located in Johor, is an important river in Malaysia. Previously Muar River had a huge influence on the socio-economic status of the community. It has been used as the sources of income, protein and as well as the major mode of transportation for the community and traders. However, does the Muar River still has that influences on this modern day? The answer of this pertinent question will fulfill the main objective of this study which is to discover Muar River relationship with its surrounding community. Approach: In addition to relationship with the river, this quantitative study was conducted to determine the Muar River community agreement towards initiative to develop the river. A total of 300 respondents from 19 villages along Muar River were selected based on the simple random sampling. Results: Based on the analysis of the results, it can be concluded that Muar River still has a lot to offer to its surrounding community especially for the recreational activities (fish and prawn fishing). A large majority of Muar River community have a moderate and high level of agreement towards the river development. Further analysis performed revealed that income per month, number of household, age, distance to Muar River and period of staying in the areas had significant relationships with agreement towards river development. Conclusion/Recommendations: It is recommended that additional recreational facilities can be added, events at national and international level especially on fish and prawn fishing can be held at Muar River and campaign on the importance of river development and the danger of river pollution can be conducted.

Sustainability of Freshwater Prawn Farming in Rice Fields in Southwest Bangladesh

Farming of the freshwater prawn (Macrobrachium rosenbergii) in rice fields is widespread in southwest Bangladesh. It plays an important role in the economy of the country, earning foreign exchange, increasing food production and providing opportunities for employment. This paper provides an overview of the sustainability of prawn farming in rice fields in southwest Bangladesh. It concludes that integrated prawn-fish-rice farming can help Bangladesh keep pace with current demand for fish and rice, and enhance economic development through exports of prawns. However, while prawn farming in rice fields has huge potential, there are environmental consequences. Some of these may eventually reduce productivity of the prawn–fish–rice farming system itself; others are the inevitable consequence of an expanding human population sequestering all available resources to itself.

Contraction of the banana prawn (Penaeus merguiensis) fishery of Albatross Bay in the Gulf of Carpentaria, Australia

When the biomass and area occupied by a stock decline together, catch rates can remain high (hyperstability) and management with effort controls may be ineffectual. Banana prawn (Penaeus merguiensis) catches declined from 2000 until 2005 in the Albatross Bay area in the Gulf of Carpentaria (GOC), Australia. Data from commercial logbooks were used to investigate historical changes in the banana prawn fishery in this and other regions of the Northern Prawn Fishery to infer the potential causes of this decline. Data since 1970 were analysed using: (1) the mapping of catch and effort; and (2) normalised rank order catch curves, to determine the distribution of catches across fishing areas. These analyses show that there has been a marked contraction of the Albatross Bay fishery over 33 years of fishing into the centre of a stable ‘hotspot’, suggesting a potential mechanism for the observed negative relationship between catchability and biomass. We believe this is the first observation of a Peneaus prawn fishing ground contracting as biomass declines, supporting the view that the contraction of an area occupied by a stock as biomass declines, is a generalised phenomena observed widely across fisheries resources and not a dynamic confined to certain finfish and molluscs.

Prawns and piranhas: The political economy of a Tanzanian private sector marketing chain

The article presents the findings of recent research on three principal areas of prawn fishing in Tanzania: trawler and ‘artisanal’ fishing off and in the Rufiji Delta respectively, and costal ‘artisanal’ fishing from Bagamoyo. Adapting a filière‐type approach, it analyses the organisation of production, collection, processing and marketing/distribution in the various prawn commodity chains, in terms of their social and technical conditions and dynamics, and the characteristics and linkages of different forms of enterprise and their agents. The findings of the study are then related to relevant theoretical debates about production forms and markets in African farming and fisheries, including contracting and sharecropping; the sources, mechanisms and effects of market power in food commodity chains; forms of enterprise development and accumulation in Africa; and issues of globalisation in food commodity chains.

Prawn Culture and Juvenile Prawn Fishing in West Bengal, India

Prawn Culture and Juvenile Prawn Fishing in West Bengal, India

Effect of otter prawn trawling on the macrobenthos of a sandy substratum in a New South Wales estuary

The effect of the use of otter trawling gear (of the type commonly employed for prawn fishing in New South Wales estuaries) on the macrobenthos of a sandy substratum was studied. The effect was assessed by direct quantitative sampling of the macrobenthos at three treatment sites and one control site on three occasions: before and after intensive trawling, prior to the opening of the commercial prawning season. and again at the close of the commercial season. Underwater observations of otter trawl nets were also made. The similarity of sites was examined using numerical clustering techniques as a preliminary step to statistical comparisons of epifaunal, infaunal and 'whole' faunal community indices (No. of individuals. No. of species and Shannon species diversity) by analysis of variance. From both the quantitative sampling and underwater observations, it was shown that the otter praazn trawling gear used did not cause any detectable changes in the macrobenthic fauna of the trawl grounds.

Studies on the behaviour and substratum preference in juveniles of the marine prawn, Metapenaeus monoceros (Fabricius)

Circadian rhythmicity in the behaviour of the marine prawn, Metapenaeus monoceros (Fab) and its substratum preference has been observed under laboratory conditions. In the morning at 9. a.m. 80% prawns remain buried and in the afternoon at 3 p.m. 60% burrowing was observed. A contrasting situation was observed in the night i.e. 17% burrowing at 9 p.m. and 30% burrowing at 3 a.m. was registered. In the second set of experiments juveniles were subjected to four types of substrata viz. mud, black fine sand, white coarse sand and stones. It was noted that M. monoceros showed more affinity towards the mud and less preference to other substrata. The obtained results are discussed to provide clues for prawn fishing.

Monthly Reports on the Fishing in the Neighbourhood of Plymouth

Iintroductory StatementIn these reports I shall not take into consideration the mMBIr methods of fishing which are practised in the locality, such, for instance, as eel spearing, mullet trapping, shrimp and prawn fishing, but shall confine myself to the most important branches, in which the beam trawl, drift and seine nets, and long lines are employed, and I shall also include crab and lobster fishing.With reference to the class of boats employed in this neighbourhood, the trawlers, compared to those of the North Sea, are not of large size. The average boat is about forty-three tons. They are usually rigged as ketches (dandy-rig), but the smaller ones sometimes as cutters. The dandy-rig is preferred because with it there is not the very large mainsail and heavy boom of the cutter, and also because, like the yawl, where the mizzen mast is stepped behind instead of before the stern-post, the vessel can be more easily brought under easy canvas in heavy weather. These vessels only carry four men and a boy as crew, and therefore the question of ease in handling becomes one of great importance. Steam trawling is not practised from Plymouth, nor do the sailing trawlers fish in the “fleeting” system common in the North Sea, where many boats belong to one company and remain on the fishing grounds it may be for weeks, while their fish is carried to market by special steamers.At Plymouth each trawler is worked independently, goes out to the fishing grounds east of the Eddystone, Mounts Bay, or Bristol Channel, and returns with its catch.

Notes on the Fishing Industry of Plymouth

In the following Notes on the Fishing Industry of Plymouth the information obtained is divided into three sections, which are again subdivided as follows:I.—Methods of fishing, localities fished, and fish caught. There are eleven different methods of fishing carried on in Plymouth:1. Beam trawling. 2. Drift-net fishing. 3. Moored-net fishing. 4. Seine fishing. 5. Bultering, or long-line fishing. 6. Hand-line fishing. 7. Eel spearing. 8. Mullet trapping. 9. Crab and lobster fishing. 10. Shrimp and prawn fishing. 11. Oyster, mussel, and cockle fishing.