Fishing Technology Research Articles

Mitigating unwanted catches in the southern Iberian hake stock fisheries: Improving fishing technology vs market control policies

Unwanted catches can be reduced by improving fishing effectiveness in targeting species and sizes and by banning their sale for human consumption. The landing obligation introduced by the European Union can be seen as a combination of these two measures, and the aim of this paper is to analyse its effects on the Southern Iberian Hake Stock fishery. To this end, reference points for a mixed fishery are computed under the two measures as the steady-state solution of a dynamic optimal management problem. Our results show that measures that improve selectivity obtain better results than sales ban strategies in terms of increasing yields and stocks and reducing discards. In particular, we find that reducing the selectivity parameters by 90% for the three early ages leads to an almost six-fold increase in the hake yield and lowers the discard rate by more than 20 percentage points. Banning the sale of the two youngest ages also increases hake yield by 21% and the discard rate by 7 percentage points.

Kearifan Lokal Masyarakat Pesisir dalam Memahami Teknologi Hasil Perikanan

<em>Characteristics of people in coastal area are taught and open mind like sea which is analog to open access and high risk. They inherit knowledge from their ancestors who refered to stars constelation as guide, besides other traditional technologies. There are four research questions: (1) How are technologies inherited to young generations? (2) Are the developing fish technologies accepted? (3) What are governments’, scholars’, and NGO’s roles? and (4) How is people’s responds towards modern technologies? Meanwhile, this research wants: (1) To know inheritance technologies, (2) To understand acceptability level, (3) To explore the roles’ of governments, NGOs, and scholars, and (4) To recognize people’s respond toward technologies. Fisheries commodities have comparative advance, although they are perishable food that need quick, accurate, and right treatment. The research was conducted in Larantuka Sub-district of East Flores. Observation and interview were data collection methods applied in this research. Data were analysed using SWOT analysis. It is concluded that traditional technologies are useful to preserve local culture and wisdom. The role of government through local development agents, NGOs, and scholars via trainning has not applicable yet for the community in the wide area and has limitations of man power.</em>

Modelling interactions of fish, fishers and consumers: should bycatch be taken into account?

Consumers’ preferences coupled with available fishing technology determine fisheries’ harvests and impacts on the ecosystem. In this paper, I investigate the effects of unintended catch, or bycatch, on consumption decisions and harvests. To this end, a multi-species coupled ecosystem economy model including consumer preferences is extended to also include bycatch in harvesting. The resulting equilibria and dynamics of the model are solved analytically. This allows demonstration of the effects of bycatch not only on the ecosystem, which are comparatively well researched, but also on the economic actors harvesting and consuming fish stocks. The main results, besides replicating the finding that bycatch can increase harvesting mortality, are that even strong bycatch may have no effects on stocks and that the harvesting economy may change dramatically depending on bycatch intensity. Therefore, bycatch should indeed be taken into account in the economic modelling of fisheries. Furthermore, understanding the interrelation of bycatch and market forces is essential in designing overarching policy where economic effects, such as changing employment, need to be considered while also ensuring sustainable use of the ecosystem.

Ipteks bagi Masyarakat (IbM) Kelompok Nelayan Purse Seine Di Desa Siddo Kecamatan Soppengriaja Kabupaten Barru

The partner's problem is the high cost of fuel If the fishing area around Siddo usually spends 50 – 100 liters pertrip (Rp250.000 – Rp 500.000). If the fishing area is very far away, then the number of operating days is usually 3 to 4 dayslater it takes 300 - 400 liters per trip (Rp1,500,000 - Rp2,000,000). The catching area was unclear, and the catch in 2009 hasdecreased, one of the problems is allegedly caused by fishermen not using the latest fishing technology, including the useof fishing aids (global position system, fish finder). How to get potential fishing locations and at the same time read fishingmaps, resulted in the search for an extensive fishing area and certainly needed a lot of fuel. The purpose of this activity isto 1). Increase catches and reduces operational costs 2). Improve the ability of purse seine fishersto use fishing aids andable to independently read fishing maps. The benefits of this activity are expected to increase fishermen's income. Themethod used is Participatory Rural Appraisal (PRA) And implementation methods namely counseling, training anddemonstration and evaluation. Apply fishing aids according to maps of fishing grounds issued by the Indonesian Ministryof Maritime Affairs and Fisheries. The results of this activity are very satisfying. Fisherman's mindset to use training onhow to calculate ice usage has added the ability to calculate ice usage according to the number of fish to be preservedMentoring fishers in the practice of using fishing aids and developing business partners as well as how to read a fishingmap excellent response. Finally able to use and interested in buying a similar tool. The conclusion of the activity is 1)Fishing aids have affected the catch and reduced operational costs, 2) Fishermen have been able to read fishing maps theninput into GPS independently

Mātauranga Māori driving innovation in the New Zealand scampi fishery

ABSTRACT Motivation to improve commercial fishing technology is changing from ‘how can we catch more fish’ to ‘how can we reduce the impact of fishing on the environment’. To implement new fisheries technologies and innovations, it is important to have sources of innovative ideas for improvement, and processes to allow the uptake and transition from old to new technologies. One fishery that is undergoing a technology transition is the New Zealand scampi (Metanephrops challengeri) fishery. Here we report on a research programme aimed at improving the cultural and environmental performance of scampi fishing practices, initiated by the Māori-owned Waikawa Fishing Company, and underpinned by Mātauranga Māori and values inherent in kaitiakitanga. This paper provides a case study for how Mātauranga Māori and western science can engage in a fisheries technology transition through a transdisciplinary research programme.

Steering Committee for the Colloquium on Fishing Technology

Steering Committee for the Colloquium on Fishing Technology

“PIBER LEDFRESUR” (PENANGKAPAN IKAN BERBASIS LED DAN FREKUENSI SUARA)

The condition of fishery resources in Barru Regency can still be categorized as good fishery and not yet widely used, due to lack of adequate fishing catch fisheries. One of the locations of fishing operations in Barru namely Mallusetasi waters. The dominant fishing gear used in fishing operations in Barru include seine trawl, fishing rod, gill net, tap chart and floating chart but still not giving optimal result. the goal in this program is the application of LED-based fishing technology and the determination of the frequency of sound can be useful for the fishermen community and increase the number of catch and environmentally friendly. This activity is divided into 3 stages namely the initial stage (preparation), the stage of implementation, and the final stage all of which was carried out approximately for 5 months. PKM has a promising potential both in terms of knowledge and its application. PIBER LEDFRESUR during its application gives effect to the number of fisherman catch and the amount of compression / economy of new bojo fishermen in new regency. With the use of PIBER LEDFRESUR the energy used is relatively small as well as the most gterpenting environmentally friendly. The catch of a fisherman usually 1 capture in 4 hours now using FIBER LEDFRESUR rose to 4 times in 4 hours, with a catch of 20 kg per catch

Reducing bycatch through a risk pool: A case study of the U.S. West Coast groundfish fishery

Voluntary collective agreements among fishermen can improve the environmental and economic performance of a fishery, particularly when local leadership, strong incentives, catch accountability, and operational support are in place. Rights-based fisheries, such as Individual Fishing Quota (IFQ) systems, incentivize fishermen to act collectively to reduce fishing impacts, enhance stock health, and improve economic outcomes. However, developing cooperatives requires durable contracts, operational capacity, funding, and the ability to track, monitor, and enforce agreed-upon catches and fishing practices. This project focuses on the U.S. West Coast groundfish trawl IFQ fishery, and how the formation of a voluntary collective agreement, in the form of a bycatch risk pool (California Groundfish Collective), achieved improved fishery performance and other ancillary benefits. Up-front investment in the risk pool by a conservation non-governmental organization (NGO) provided both capacity and quota to cover transaction costs and incentivize transition to a cooperative model that was implemented across 5 ports and more than 48,000 km2 of fishing grounds off California. The challenges encountered in developing and operating the risk pool offer insights into designing and implementing voluntary collective agreements. By using spatial fishing plans and technology for collecting and sharing catch information, risk pool members reduced bycatch of overfished species relative to the fleet at large. Risk pool members were also able to use their spatial fishing data to inform a seafood sustainability rating and propose areas for Essential Fish Habitat protection, their quota pounds to support collaborative research on overfished species, and their collective membership to advocate for policy.

The “Commons” Discourse on Marine Fisheries Resources: Another Antecedent to Hardin’s “Tragedy”

Abstract Throughout the fifty years since its publication, Hardin’s “The Tragedy of the Commons” has been regarded as a seminal paper in the environmental movement, although his emphasis on population control (which actually formed the core concern of the article) has been largely forgotten. Hardin argued that free access by a growing population to common resources would inevitably lead to the depletion of those resources, citing as one example how maritime nations’ belief in the freedom of the seas, combined with their belief in the inexhaustibility of marine resources, had brought whales and many species of fish close to extinction. Hardin failed, however, to take account of the extensive debates throughout much of the twentieth century by scientists and policymakers on the general problem of the ocean commons — what they generally termed the “dilemma of the commons” — as it applied not only to living marine resources but also to mineral resources. By mid-century, as improved fishing technology gave rise to ever greater catches, the notion of the inexhaustibility of fisheries was largely discredited; hence scientists as well as experts in both national and international law became focused on addressing the dilemma of the commons through fisheries management, and specifically by determining the Maximum Sustainable Yield. Some economists, arguing instead for maximum efficiency, urged that open access be abandoned in favor of limited entry. Such measures to resolve the dilemma of the commons were the subject of numerous conferences (including the second UN Conference on the Law of the Sea in 1958) and were widely debated in scholarly publications and, indeed, by the late 1960s had been practically implemented by a number of laws and treaties. By 1966, national control over a twelve-mile fishing zone offshore of coastal nations had been well established. These developments regarding the oceans commons, predating Hardin’s article, were apparently either of no interest to him or (if he knew of them) purposefully subordinated to his main polemical objective, which was his Malthusian analysis of the commons issue and his call for limits on “human breeding.”

Developing New Oligo Probes to Distinguish Specific Chromosomal Segments and the A, B, D Genomes of Wheat (Triticum aestivum L.) Using ND-FISH.

Non-denaturing FISH (ND-FISH) technology has been widely used to study the chromosomes of Triticeae species because of its convenience. The oligo probes for ND-FISH analysis of wheat (Triticum aestivum L.) chromosomes are still limited. In this study, the whole genome shotgun assembly sequences (IWGSC WGA v0.4) and the first version of the reference sequences (IWGSC RefSeq v1.0) of Chinese Spring (T. aestivum L.) were used to find new tandem repeats. One hundred and twenty oligo probes were designed according to the new tandem repeats and used for ND-FISH analysis of chromosomes of wheat Chinese Spring. Twenty nine of the 120 oligo probes produce clear or strong signals on wheat chromosomes. Two of the 29 oligo probes can be used to conveniently distinguish wheat A-, B-, and D-genome chromosomes. Sixteen of the 29 oligo probes only produce clear or strong signals on the subtelomeric regions of 1AS, 5AS, 7AL, 4BS, 5BS, and 3DS arms, on the telomeric regions of 1AL, 5AL, 2BS, 3BL, 6DS, and 7DL arms, on the intercalary regions of 4AL and 2DL arms, and on the pericentromeric regions of 3DL and 6DS arms. Eleven of the 29 oligo probes generate distinct signal bands on several chromosomes and they are different from those previously reported. In addition, the short and long arms of 6D chromosome have been confirmed. The new oligo probes developed in this study are useful and convenient for distinguishing wheat chromosomes or specific segments of wheat chromosomes.

Ujicoba DC converter dengan Baterai Air Laut Cu-Zn sebagai Sumber Energi Lampu untuk Perikanan Bagan Tancap

Light fihing activities developed rapidly after the invention of electric lights. The innovation of Light Emitting Diode (LED) as energy saving lamp has a great opportunity to be used in fishing activities. LED lamps require low voltage and current, so that it can be combined with renewable energy sources to encourage more environmentally friendly of fishing capture activity. This study aims to determine the design and construction of an optimal DC converter using Cu-Zn seawater battery as an early stage of LED lamp development with seawater energy source for fixed lift net fishery. The research was conducted at Fishing Technology Laboratory, Department of Fisheries Resources Utilization, FPIK-IPB in August 2017. The treatments were number of windings (30:50, 50:80) and number of toroid (single, double) that was used in DC converter circuit. The energy source used comes from a single seawater battery cell with a zinc anode (Zn) and a copper cathode (Cu) with a size of 40x36 cm, inserted into a 3-inch diameter PVC tube. The voltage was measured by a digital oscilloscope (Iwatsu DS 5102), the current was measured using a multimeter (Sanwa CD 771) and the light intensity was measured using a lux meter. Differences in the number of windings and toroid have a significant effect on the value of inductance. Single Toroid with 80 loops produces the largest inductance value (143.1 mH) compared to other treatments. The use of DC converter with dual toroid and 50:80 winding provides better performance than other treatments with maximum voltage, current and intensity respectively 2.12 V; 121,80 mA and 128 lux

Gonadal Assessment of Picnic Sea Bream Acanthopagrus berda (Forsskål 1775), a Potential Aquaculture Candidate for Indian Waters

Gonadal assessment of Acanthopagrus berda (Forsskal 1775), a commercially and recreationally important fish from Indian waters, was studied by collecting 250 fishes from the Korapuzha estuary, Calicut, Kerala using cast net during December 2015 to January 2016. External morphology of the gonads reveals that A. berda is bisexual (with ovo-testis) in nature with the ovarian lobe in the mid-dorsal region of the abdominal cavity and the testicular lobe as a band along the ventro-lateral wall with a major portion running along the extreme posterior region of the gonad. Males were dominant in lower length classes (17–23 cm) while females dominated in upper length classes (24–43 cm), confirming protandrous hermaphroditism in the species. Gonado-somatic index (GSI) was significantly higher (P<0.05) for the females. Males and transitional groups were showing almost similar GSI. External morphological and histological evaluation of the gonads of A. berda during the 2-month study revealed the presence of different developmental stages such as matured testis with oozing milt, an intermediate gonad structure with an anterior thin ovary-like structure and a posterior thick testis-like morphology indicating a transitional ovo-testis, maturing ovary and matured ovary. The simultaneous availability of milt oozing males and matured females from the wild indicates the opportunity for development of captive breeding, seed production and hatchery technology for this important commercial food fish.

SELECTION OF KURAU FISHING TECHNOLOGY UNITS Eleutheronema tetradactylum WHICH COMPETITIVE AND SUSTAINABLE

Environmentally friendly fishing technology unit is needed in sustainable fisheries management. The purpose of this study was to determine the fishing technology unit of kurau competitive and sustainable. Data collection was carried out from July to September 2016 in the Coastal Pambang of Bengkalis District of Riau Province, by using the survey method. The analytical data method used is scoring the biological, technical and socioeconomic aspects the fishing technology unit of kurau. Results of research show that combined analysis of biological, technical and socioeconomic aspects have the value of the VA fishing line function (2.48) is higher than the other three fishing gear. Thus, the fishing line is a selected fishing technology unit of kurau competitive and sustainable in the Coastal Pambang Bengkalis District. Keywords: competitive,coastal pambang, fishing technology, kurau fish,sustainable fishing

Lipid deposition patterns among different sizes of three commercial fish species

This study was conducted to compare lipid deposition pattern of three fish species among fish size, Large yellow croaker (Larmichthys crocea), Japanese seabass (Lateolabrax japonicus) and Turbot (Scophthalmus maximus L.), Using magnetic resonance imaging technology for adult fish, results showed that lipid of large yellow croaker mainly deposits in abdominal cavity wall, while for Japanese seabass mainly deposit in visceral adipose tissue and for turbot lipid mainly distribute subcutaneous tissue. Three sizes for each species were selected: S1 (small size), S2 (intermediate size) and S3 (big size), to examine chemical analysis. Results of chemical analysis indicated that whole body lipid content of large yellow croaker significantly increased with the increase in body weight, but Japanese seabass and turbot significantly decreased (p < .05). Lipid content of muscle and intestinal tract in large yellow croaker significantly increased with the increase in body weight (p < .05), but lipid content of adipose tissue, kidney, heart and skin in S2 group were higher than S1 and S3 groups (p < .05). Lipid content of liver, eye, kidney and brain in Japanese seabass significantly increased with the increase in body weight (p < .05), but lipid content of stomach and heart showed an opposite trend. Lipid content of liver, adipose tissue, skin and eye in turbot significantly decreased (p < .05), but lipid content of brain significantly increased with the increase in body weight (p < .05). The results indicated that lipid content of different tissues in fish presented different trends, which was species-dependent.

Socio-economic, technological and environmental drivers of spatio-temporal changes in fishing pressure

As part of an ecosystem based approach to fisheries management (EBFM), the heterogeneity of biological communities, key ecological processes and human uses must be understood. Although fishing effort distribution and marine habitat distribution and use are increasingly well understood, little research has quantified spatio-temporal changes in fishing effort or investigated drivers of these changes. Here, a holistic approach was taken to investigate socio-economic, environmental and technological drivers of change in fishing effort distribution of the Northumberland pot-fishery (2004–2014) using Bayesian Belief Network (BBN) analyses. BBNs were populated using large-scale high resolution spatial and temporal fisheries monitoring data, quantitative and qualitative interviews with fishers and expert opinion. Increases in fishing effort over time were explained by a combination of changes in fleet composition and fishers’ behaviour. Increasing vessel and engine sizes, combined with an increased uptake of improved fishing technology have resulted in a greater ability for vessels to fish a greater number of pots. This increase in vessel and fishing capability has resulted in fishers’ increased ability to fish in harsher weather conditions, as well as target specific areas or habitats quickly and opportunistically. Non-technological factors, such as declines in stocks of finfish and nephrops and the increasing operational costs of participating in these fisheries may have resulted in fishers solely fishing in the less regulated pot-fishery, targeting high value European lobster on a full-time basis. Increasing costs of pot-fishing in Northumberland coupled with stagnating crab and lobster landings prices may have resulted in increased fishing effort to maintain profitability.

An overview of cleaner fish use in Ireland.

Sea lice infestations represent one of the most significant challenges facing the salmon farming industry, giving rise to lost production, additional costs of treatment and potential negative interactions with wild stocks. At present, cleaner fish, which actively remove lice from salmon, are an effective, biological, long-term option which has been adopted by many countries. In Ireland, several key studies were conducted in the 1990s on the use of wild-caught wrasse (corkwing, goldsinny and rock cook) as cleaner fish in experimental and commercial scale trials. More recently, the National University of Ireland Galway (NUIG), at their marine research facility in Carna (CRS), has undertaken applied research on ballan wrasse and lumpsucker. Currently, CRS is providing lumpsucker juveniles and research and development for the Irish salmon industry with support from BIM (Ireland's Seafood Development Agency) and Marine Harvest Ireland. There is a large amount of research currently being carried out in this area in all countries that are utilizing cleaner fish technology. The current focus in Ireland is the development of a native lumpsucker broodstock to facilitate its sustainable production. The aim of this article was to provide an overview of the research, challenges and use of cleaner fish in Ireland.

Patent data mining in fisheries sector: An analysis using Questel-Orbit and Espacenet

The advent of an enormous amount of patent data in various patent databases and patinformatics tools to analyze this data have led to an easy access to information for studying the technological trends and R&D activities in a sector. The fisheries sector is driven by the demand and profit generated and there are some unforeseen trends exhibited at different phases of development in specialized areas related to fisheries. In this study we have retrieved patent data of seven technology domains in fisheries, such as Fish, Fish Culture (FC), Fishing Technology (FT), Fish Processing and Products (FPP), Fish Health and Nutrition (FHN), Fish Genetics (FG) and Fish Rearing (FR) during 2000–2015. The legal status of patents, top priority countries and top assignees in different fields of the fisheries sector were analyzed. The results were compared with various developmental trends, indicating a clear relation to industrial ups and downs, the emergence of more patent portfolios in countries coping with latest technology trends and the improper litigation of legal status of the patents filed in the fisheries sector. Patent analysis in a specialized sector could be used as a potential tool in global policy debates, where fish as a natural resource is over-exploited without realizing its real potential.

Numerical Simulation of an Oscillatory-Type Tidal Current Powered Generator Based on Robotic Fish Technology

The generation of clean renewable energy is becoming increasingly critical, as pollution and global warming threaten the environment in which we live. While there are many different kinds of natural energy that can be harnessed, marine tidal energy offers reliability and predictability. However, harnessing energy from tidal flows is inherently difficult, due to the harsh environment. Current mechanisms used to harness tidal flows center around propeller-based solutions but are particularly prone to failure due to marine fouling from such as encrustations and seaweed entanglement and the corrosion that naturally occurs in sea water. In order to efficiently harness tidal flow energy in a cost-efficient manner, development of a mechanism that is inherently resistant to these harsh conditions is required. One such mechanism is a simple oscillatory-type mechanism based on robotic fish tail fin technology. This uses the physical phenomenon of vortex-induced oscillation, in which water currents flowing around an object induce transverse motion. We consider two specific types of oscillators, firstly a wing-type oscillator, in which the optimal elastic modulus is being sort. Secondly, the optimal selection of shape from 6 basic shapes for a reciprocating oscillating head-type oscillator. A numerical analysis tool for fluid structure-coupled problems—ANSYS—was used to select the optimum softness of material for the first type of oscillator and the best shape for the second type of oscillator, based on the exhibition of high lift coefficients. For a wing-type oscillator, an optimum elastic modulus for an air-foil was found. For a self-induced vibration-type mechanism, based on analysis of vorticity and velocity distribution, a square-shaped head exhibited a lift coefficient of more than two times that of a cylindrically shaped head. Analysis of the flow field clearly showed that the discontinuous flow caused by a square-headed oscillator results in higher lift coefficients due to intense vortex shedding, and that stable operation can be achieved by selecting the optimum length to width ratio.

Разработка технологии кормового рыбного криофарша

Разработка технологии кормового рыбного криофарша

Impact of genetically improved fish species and technology on selected hatchery and fish production in Bangladesh

The study was carried out in IAPP commanding areas from July to September 2015. A total of 8 hatchery and 240 farmers were selected for this study from Rangpur and Barisal region. About 153% Tilapia production increased which was from 34 to 86 lakh, which was 148% in Rangpur district. Thai koi production was increased about 320% in Rangpur and it was 152% in Barisal. It was observed that, per hatchery Tilapia profit was Tk. 17.35 lakh and Tk. 17.18 lakh in Rangpur and Barisal, respectively. While, total profit was 3.9 times more for Thai koi in Rangpur and it was about 1.7 times more in Barisal after IAPP-BFRI project implementation. Impact of improved germplasm on grow out system was estimated. Finding shows that before IAPP-BFRI project the average harvesting weight of tilapia fish was 122g but after using IAPP-BFRI germplasm, it increased to 194g in Rangpur district. In case of Thai Koi, the harvesting weight gain was 26% in Rangpur district and it was statistically significant at 1% level. Survey results also show that per acre profit was only Tk.86671 for Tilapia farming before IAPP whereas it was increased to Tk. 234853 after IAPP-BFRI intervention. At the same time, profit from Thai Koi was increased about 189% after IAPPBFRI activities. Similarly, profit was increased about 86% in case of Pangus farming and this positive impact was statistically significant at 1% level. Therefore, it may conclude that, farmers can significantly increase Tilapia, Thai Koi and Pangus production as well as can maximize profit using IAPP technology.Int. J. Agril. Res. Innov. &amp; Tech. 7 (1): 58-63, June, 2017