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Letteratura scientifica selezionata sul tema "Pike fishing"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 1 marzo 2023

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Articoli di riviste sul tema "Pike fishing"

Bussell, Katrin. "PIKE fishing". Nature Reviews Molecular Cell Biology 3, n. 3 (marzo 2002): 149. http://dx.doi.org/10.1038/nrm749.

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Trella, Marek, e Arkadiusz Wołos. "Size and selected characteristics of northern pike (Esox lucius L.) commercial and angling catches in Polish inland waters over the long term". Fisheries & Aquatic Life 29, n. 2 (1 giugno 2021): 108–23. http://dx.doi.org/10.2478/aopf-2021-0013.

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Abstract Northern pike (Esox lucius L.) is of great importance to inland commercial and recreational fisheries in Poland. Thanks to northern pike’s substantial size, strength, the possibility of using a variety of fishing methods and techniques and various baits, and many other values, lake anglers value this species above all others. Additionally, for over a decade, northern pike has been the most widely stocked species in Polish inland waters of lakes, rivers and dam reservoirs. The aim of this work was to analyze in detail the size and characteristics of northern pike commercial fisheries and angling catches in Polish inland waters over the long term. The analyses were based on a compilation of traditional scientific papers, primarily analyses of commercial catches, and a review of the results of more than 40 years of studies on the size of northern pike angling catches. The analysis of research material indicated a steady decrease in commercial catches of this species in the years State Fisheries Enterprises (SFE) were in operation followed by relative stability in catches over the past two decades. The paper describes the methods used to estimate angling catches, namely questionnaire and catch-return (the so-called register) research. An increasing disproportion between the sizes of pike catches made with angling and commercial fishing gear was documented. Despite the problems presented in the paper related to estimating total pike catches, the analysis revealed that anglers catch eightfold more northern pike than do commercial fishers.

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Kaliniak, Agnieszka. "The effect of the fishing season on the use value and physicochemical properties of the meat of selected fish species reared in Polish aquaculture". Roczniki Naukowe Polskiego Towarzystwa Zootechnicznego 15, n. 3 (2 ottobre 2019): 53–63. http://dx.doi.org/10.5604/01.3001.0013.5137.

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The objective of the research was to evaluate the impact of the fishing season on the value in use and physicochemical properties of the meat of selected fish species reared in Polish aquaculture. The study was conducted on five species: rainbow trout, common carp, grass carp, pike and tench. Fish were obtained from farms located in the Lublin Voivodeship in two seasons (spring/summer and autumn/winter). Morphometric measurements of the fish were performed, the percentage shares of body parts were assessed, and the physicochemical properties of the muscle tissue were measured: pH, electrical conductivity, water holding capacity, and CIE L*a*b* colour characteristics. The fishing season significantly affected the body weight of carp, rainbow trout and pike, the greatest body height of carp and rainbow trout, and the total length and head length of pike. Pike, grass carp and tench had significantly lower Fulton’s condition factors in the autumn/winter season than in the spring/summer season. The season significantly influenced the share of viscera in rainbow trout and grass carp, and that of fins in carp and rainbow trout. A significant impact of the season was also noted in the case of pH in rainbow trout and tench, electrical conductivity in trout, pike and tench, and the M/T ratio in grass carp and tench. Chromatic parameters differed significantly between seasons in pike (a*) and in carp and rainbow trout (b*).

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Novitsky, R. A., O. A. Khristov e V. N. Kochet. "Іхтіопатологічні наслідки ураження прісноводних риб електрострумом". Visnyk of Dnipropetrovsk University. Biology, medicine 2, n. 1 (20 novembre 2010): 75–80. http://dx.doi.org/10.15421/021112.

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Data on ichthyopathological examinations of mature fish (pike, bream) from Dniprovs’ke reservoir are presented. That fish were confiscated from a person used the illegal homemade electric instrument ("electrical fishing rod"). All explored specimens of breams had keratopathy and visceral injury of different level. The most significant injuries were noted for kidney tissues. There was found the hemoperitoneum as well as nephremorrhagia and cerebral hemorrhage. In pikes it was noted the hemorrhages of hyomandibular canal. Determined ichthyopathological effects can be used for clear diagnostics of electric current lethal impact on fish.

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Georgiev, Andrey Pavlovich, Vyacheslav Anatolievich Shirokov e Nadezhda Stepanovna Cherepanova. "FISHERY CHARACTERISTICS OF PIKE ESOX LUCIUS (L.) OF TOPO-PYAOZERO RESERVOIR (WHITE SEA CATCHMENT AREA)". Vestnik of Astrakhan State Technical University. Series: Fishing industry 2021, n. 3 (30 settembre 2021): 69–76. http://dx.doi.org/10.24143/2073-5529-2021-3-69-76.

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The article presents the results of the work carried out within the framework of forecast topics and economic contractual topics aimed to assess the stock and production of pike in the Topo-Pyaozero (Kumskoe) Reservoir. There have been studied its main biological and structural-population indicators. Calculations of indicators of pike’s abundance and biomass at the present stage, necessary for the rational regulation of the fishery have been carried out. It was found that the fishing possibilities of the presented pike populations correspond to the production possibilities of its sexually mature part and the value obtained as a result of the biomass increase. Pike should be taken into the commercial operation from the age of 4+ years and older. The performed calculations of the stock size based on the materials of 2009–2020 recommend the volume of the pike total allowable catch at the present stage not less than 36 tons, or 21% of the value of the commercial stock (at the maximum rate of 23.4%). From the results of observations it follows that the abundance and stocks of pike in the Topo-Pyaozero Reservoir make it possible to provide large volumes of catch at the present time, and the total catch can be increased to the calculated values the volume of the allowable catch, provided that a rational fishery is maintained in water bodies. The intensity of fishing and an increase in pike catches in the reservoir should be considered as mandatory measures in terms of biological reclamation in reservoirs

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Grunin, Sergey I. "Dynamics of population parameters for pike Esox lucius L. (Esocidae) from the Anadyr River in the period of 1971-2010". Izvestiya TINRO 179, n. 4 (30 dicembre 2014): 45–54. http://dx.doi.org/10.26428/1606-9919-2014-179-45-54.

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Samples of pike were collected by Lab. of Ichthyology, IBPN FEB RAS in the middle stream of the Anadyr River at Markovo in June-September of 1971-2010 and processed by standard methods; in total 2410 specimens were analyzed. The pike population changed significantly during the period of observation: the fish in catches became smaller and younger, growth rate decreased, and absolute and relative fecundity increased, mainly under impact of fishery, including industrial one that intensified in 1970-1980s. As the result, the pike abundance decreased in 1980s, and the first-spawning females and males became to prevail in its catches. Further decreasing of the abundance was able to promote a reduction of competition in the population. The population could be restored only after considerable decrease of fishing pressure, or banning of the species fishery, that would improve the feeding conditions. Recent lowering of the fishing pressure due to low stock causes partial recovery of the population accompanied by heightening of elder fish portion. Now the fish spawned several times prevail in the catches. However, the growth rate and females fecundity still differ from the values typical for the 1970s. Partial recovery of the pike population should be accounted in estimations of its predatory on other fishes in the Anadyr River, including commercial species.

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Wahl, David H., e Roy A. Stein. "Comparative Population Characteristics of Muskellunge (Esox masquinongy), Northern Pike (E. lucius), and Their Hybrid (E. masquinongy × E. lucius)". Canadian Journal of Fisheries and Aquatic Sciences 50, n. 9 (1 settembre 1993): 1961–68. http://dx.doi.org/10.1139/f93-218.

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We compared growth, survival, diet, and angler catch of muskellunge (Esox masquinongy), northern pike (E. lucius), and tiger muskellunge (E. masquinongy × E. lucius) through 5 yr after their introduction into three Ohio reservoirs. Muskellunge grew slower than northern pike and tiger muskellunge through the first year but faster than northern pike in subsequent years. Large stocked esocids (180–205 mm) survived better than small ones (145 mm). Survival patterns established through the first fall were maintained through age 5; northern pike survived best, followed by muskellunge and tiger muskellunge. Angler catch reflected differences in survival as well as catchability among taxa. Northern pike were caught at smaller sizes and younger ages than other taxa. Gizzard shad (Dorosoma cepedianum) dominated esocid diets for all taxa and age classes, followed by centrarchids and cyprinids. Prey length consumed increased linearly with esocid length; northern pike selected larger gizzard shad than either muskellunge or tiger muskellunge. These differences in population characteristics among esocids should influence mangement and stocking programs. Whereas northern pike maximize angling opportunities, muskellunge probably will provide trophy fisheries. Although tiger muskellunge can be reared inexpensively, they appear to provide little recreational fishing in return.

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Verta, Matti. "Changes in Fish Mercury Concentrations in an Intensively Fished Lake". Canadian Journal of Fisheries and Aquatic Sciences 47, n. 10 (1 ottobre 1990): 1888–97. http://dx.doi.org/10.1139/f90-213.

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A small polyhumic lake inhabited by northern pike (Esox lucius), burbot (Lota lota), perch (Perca fluviatilis), roach (Rutilus rutilus), and eel (Anguilla anguilla) was fished intensively during spring 1984 and 1985 to lower the high mercury levels in the top predator, northern pike. A total catch of 29.5 kg∙ha−1 (74% roach) was removed which represented about 50% of the total fish biomass. Mercury concentrations in burbot, large pike, and small roach had decreased by 1987 and 1988, but increased in young pike and some perch. Northern pike had the clearest increase in growth rate, while that of perch and roach levelled off within 3 yr at the prefishing level. Only a small increase in growth rate of burbot occurred. The yearly accumulation of mercury in northern pike remained constant, and the decrease in [Hg] was apparently due to growth dilution. The decrease in [Hg] of burbot and roach is explained by a switch to a diet with lower [Hg] or a decrease in water methylmercury concentrations. The amount of methylmercury removed from the lake by fishing was equivalent to several years of calculated mercury methylation and accumulation in the fish. Overfishing may be a feasible means of lowering methylmercury levels in this type of oligotrophic lake.

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Shutkarayev, A. V., G. K. Barinova e A. S. Assylbekova. "ASSESSMENT OF THE STATE OF FISH RESOURCES OF LAKE BOROVOE". Chronos 6, n. 8(58) (13 agosto 2021): 8–14. http://dx.doi.org/10.52013/2658-7556-58-8-2.

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This article provides an assessment of the state of fish resources of Lake Borovoe. 5 stations were surveyed to study the ichthyofauna. Currently, the lake is home to 12 species of fish from 5 families. The most widely represented family of carp is represented in Lake Borovoe, 5 species are noted, 3 species are found from the whitefish family, 2 species from perch, the pike and balitor families are represented by 1 species. In general, the state of fish resources in Lake Borovoye is assessed as satisfactory. According to the results of research fishing, it was established that the organization of amateur (sports) fishing, fishing for reproductive purposes, and research fishing is possible in Lake Borovoye.

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Badryzlova, Nina Sergeevna. "Comparative characteristics of the conditions for harvesting, transportation and spawning of pike perch in fish farms in Kazakhstan". Rybovodstvo i rybnoe hozjajstvo (Fish Breeding and Fisheries), n. 8 (27 luglio 2021): 43–55. http://dx.doi.org/10.33920/sel-09-2108-04.

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A description of biotechnical methods of harvesting pike perch in natural reservoirs, methods of catching pike perch spawners, keeping in adaptation cages and transporting pike perch from fishing sites to the farm is given. Pike perch breeders were caught from the reservoirs with fixed and floating nets during the period: in the Kapshagai reservoir from 10 to 20 April; in the Syrdarya river — from April 20 to May 5. The adaptation was carried out in cages located in the coastal zone. Transportation to the fish farm was carried out in live fish tanks with a volume of 1 and 3 m³ with water aeration. The reproduction of pike perch was carried out in two fish farms of the Republic of Kazakhstan. The data on spawning of pike perch in two ways are given: in cages on nests; as well as the receipt of reproduction products by the factory method from “flowing” producers. In the first case, females and males were placed in cages in a ratio of 1:1 and 1:2; a spawning nest was installed in each cage and spawning was monitored. In the second case, from the “flowing” pike perch breeders ready for spawning, reproductive products (eggs and sperm) were obtained, fertilization and degluing were carried out with a suspension of white clay. The monitoring of hydrochemical indicators was constantly carried out, the dates of the beginning and end of spawning of pike perch were determined. The article presents the fish-breeding and biological characteristics of pike perch producers participating in spawning. The mass of spawned pike perch females in LLP “Halyk Balyk” ranged from 2 kg to 2.5 kg, males — 1.5–2.5 kg; females weighing 2.1–2.6 kg were used in the Republican State Enterprise “Kamyshly-Bashsky Fish Hatchery”; males — from 1.2 kg to 2.4 kg. Based on the results of the research, biotechnical standards were developed for the preparation of pike perch producers in water bodies, for transportation to fish farms, standards for spawning of pike perch in various ways.

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Più fonti

Tesi sul tema "Pike fishing"

Karlsson, Christian, e Tobias Aili. "Gäddfisketuristerna : En kartering och marknadssegmentering av de Europeiska marknaderna för gäddfiskande turister i Sverige". Thesis, Karlstads universitet, Institutionen för geografi, medier och kommunikation, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-33619.

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This investigation indicates that there are regions within Europe that seems to have similar preferences and priorities regarding pike angling travels to Sweden. Swedish pike angling facilities process in first hand markets with favourable economic circumstances and a cultural interest for pike angling. There was a big differences in features between the Northern, Western, Eastern and Southern regions of Europe. They also seems to be tied to specific regions within some of the nations. The regions have diverse requirements and distinguish in terms of consumption and preferences regarding different aspects of pike angling. From there it is possible to divide pike angling tourists into segments. Sometimes the identified regions have economic or cultural linkage, consequently parallels can be drawn to research in the field of international marketing. The North European market for pike angling tourism in Sweden is varying where the English and Baltic states is more frequently processed than the domestic market. Markets outside of the Nordic countries were the most important among the pike angling facilities, standing for approximately 90 % of the businesses. In this Investigation two segments were observed in countries with in general weaker economic circumstances. Usually these countries had a budget concentrated consumption but also elements of a more luxurious consumption pattern. These countries were located in Eastern Europe. Angling tourists from Western Europe have in general more purchase power and constitute the most important markets for the Swedish pike angling facilities. Tourists from Western Europe are by tradition the most frequent visitors. The economic situation in the Southern Europe together with lack of cultural interest for pike angling seems to be an explanation for the low activity in processing of these markets. The only exception is the Italian market which on a regional level is more frequently processed among the Swedish pike angling facilities. In this investigation, markets from 17 Swedish pike angling facilities were mapped by the frequency of process through phone surveys. Characteristics of the companies were either profiled businesses towards pike angling or had a strong dependence on resource of pike in their business. Tour operators from 11 countries who offers packaged travels to the facilities were also interviewed through phone surveys. The facilities together with the tour operators identified some economic preferences and cultural differences between some nations and regions. For better background data about the interest for pike in Europe 6 angling associations answered an e-mail survey. The investigation also includes an interview with one of the pioneers and former vice president for one of the most successful pike angling facilities in Sweden. Selection of facilities, concepts and parameters is inspired by the authorities’ publications in the field of angling tourism. Also advices from the national angling project (SwedenFishing) have inspired parts of this thesis.
Utredningen indikerar att det finns regioner i Europa som har liknande preferenser och prioriteringar när de reser för att fiska gädda i Sverige. De svenska gäddfiskeanläggningarna bearbetar framför allt marknader som har gynnsamma förhållanden i ekonomiska förutsättningar och kulturellt intresse för gäddfiske. Det fanns stora skillnader i egenskaper av regionerna som kan delas in i Nord-, Väst-, Öst- och Sydeuropa. Dessa visade sig även vara bundet till vissa regioner inom nationerna. De olika regionerna har olika behov och utmärker sig olika i sin konsumtion och preferenser när det gäller aspekter av gäddfiske. Därefter går det att dela in gäddfisketurismen i olika segment. Regionerna har ibland ekonomiska och kulturella samband vilket paralleller kan dras till forskning inom internationell marknadsföring. Den Nordeuropeiska marknaden för gäddfisketurism får anses vara varierande där England samt de baltiska staterna bearbetades mer frekvent än den svenska marknaden. De utomnordiska marknaderna var de klart mest betydelsefulla bland anläggningarna med en ungefärlig andel på 90 % av verksamheten. I utredningen uppmärksammades två segment i länder med generellt svagare ekonomiska förutsättningar, de hade mestadels en budgetinriktad konsumtion med inslag av lyxkonsumtion, dessa var framförallt länder i Östeuropa. Generellt är turisterna från Västeuropa mer köpkraftiga och utgör de viktigaste marknaderna för de svenska gäddfiskeanläggningarna, de är också av tradition de mest frekvent besökande. Den ekonomiska situationen i Sydeuropa tillsammans med avsaknad av kulturellt intresse för gäddfiske verkar vara förklaringen till den låga aktiviteten i bearbetningen av dessa marknader. Det enda undantaget är den Italienska marknaden där den lokalt bearbetas i större utsträckning av svenska gäddfiskeanläggningar. I utredningen kartlades marknaderna som 17 svenska gäddfiskeanläggningarna bearbetar genom en telefonenkät. De var oftast profilerade eller var starkt beroende av gäddresursen i sin verksamhet. Även reseoperatörer från 11 olika länder som säljer paketerade resor till dessa anläggningar intervjuades genom en telefonenkät. För att få en bättre bakgrundsdata om intresset för gäddfiske besvarades även en mailenkät av 6 lobbyorganisationer för sportfiske. Utredningen omfattar även en intervju med en av pionjärerna och tidigare VD för en av de framgångsrikaste gäddfiskeanläggningarna. Urval, begrepp samt parametrar är inspirerade av myndigheternas publikationer i ämnet. Även råd från det nationella fiskeprojektet i Sverige (SwedenFishing) har gett inspiration till delar av uppsatsen.

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Seaton, Anne. "Historic Structures Report: Lone Pine Indian Shaker Village, a Nineteenth Century Fishing Settlement in The Dalles, Wasco County, Oregon". Thesis, University of Oregon, 1996. http://hdl.handle.net/1794/24503.

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155 p.
Lone Pine Indian Shaker Village, located in The Dalles, Oregon, is the last remaining example of a late nineteenth century fishing settlement, a resource type that once proliferated along the banks of the Columbia River. Lone Pine Indian Shaker Village is also significant for its association with mixed heritage settlement, Native American fishing traditions, and the Indian Shaker Religion, a religion unique to the Northwest. This is an historical and architectural study of the village which includes the historical context and detailed description of the built environment, as it exists today and has evolved over time. Photographs, measured drawings, oral interviews and archival research are used to document and analyze the history and built environment of the village. Also included is a discussion of Treatment and Use options, followed by the author's recommendation for preservation and use of the village complex as an interpretive site. Today the village complex is vacant and suffers from neglect, and on November 19, 1996 the Indian Shaker Church collapsed under snow loads. Although an unfortunate event, it brings the issue of preservation of the entire site to the forefront. If no management plan is developed this valuable piece of Northwest cultural history will be lost forever.
Keepers of the Preservation Education Fund's H. Ward Jandl Fellowship

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Braccini, Juan Matias. "Assessment of ecological risks from effects of fishing to Piked Spurdog ( Squalus megalops ) in South - Eastern Australia". 2006. http://hdl.handle.net/2440/37791.

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Target species in some Australian shark fisheries are adequately managed, but there has been little attention given to non - target shark species and there is limited information on the biology of their local populations. Among this group of non-target species, the piked spurdog - Squalus megalops ) is of special interest because it is a dominant and ecologically important species with high natural abundance. Hence, the main purpose of the present research was to improve knowledge of the basic biology of this species and to provide essential data for its management, sustainable use and conservation. Squalus megalops had a complex population structure, segregating by sex, size and breeding condition. The sex ratio was biased towards females and there was sexual size dimorphism with females attaining a larger maximum size than males. Conversion factors from partial lengths to total length and from partial masses to total mass were determined due to the common commercial fishing practice of eviscerating, beheading and finning sharks. Comparisons of total and partial length - length and mass - length relationships between males and females using different ranges of size showed that there was no effect of size range on measurements reflecting only somatic growth ( fork and carcass lengths ; carcass, pectoral fin and caudal fin masses ). However, for variables reflecting somatic and reproductive growth ( total and liver masses ), different outcomes can be expected when different ranges of size are compared. Examination of dietary composition revealed that S. megalops is an opportunistic predator that consumes a wide range of prey items. High variability was found when overall importance of prey items was estimated. Dietary composition varied in space and time, exhibiting differences among regions, seasons and size classes. Therefore, the intrinsic natural variability in the dietary composition of S. megalops and its spatial and temporal variation in diet suggest that information on the ecological relationships among species is likely to be missed when predator - prey interactions are only inferred from overall diet. Reproductive parameters were determined for population assessment. For both sexes, length - at - maturity differed depending on the criterion adopted for defining maturity. Mature males are capable of mating throughout the year. Females have a continuous asynchronous reproductive cycle. The sex ratio of embryos is 1 : 1 and litter size and nearterm embryo size increase with maternal length. Females have an ovarian cycle and gestation period of two years. Although all females are mature at 600 mm, only 50 % of them are in maternal condition, contributing to annual recruitment each year. Hence, for chondrichthyan species with reproductive cycles of two, three or more years, if maturity ogives are used in population assessments instead of maternity ogives, the models will over - estimate recruitment rates. Age and growth information was also determined for population assessment. Precision estimates, the relationship between spine total length and body length, edge analysis, and agreement between counts on the inner dentine layer and the enameled surface support the use of the first dorsal fin spine for the age estimation of S. megalops. Based on goodness - of - fit criterion, the best growth model for males and females was a two - phase von Bertalanffy function. However, model selection cannot be based on quality of statistical fit only and results should be interpreted with caution. Regardless of the model used, the growth rate of S. megalops, particularly of females, is very low, even within the range of growth rates reported for shark species. A three - levelled hierarchical risk assessment approach was trialed to evaluate the suitability of the approach for S. megalops. Integration of qualitative, semi - quantitative, and quantitative biological and fishing impact data showed that S. megalops is potentially highly susceptible to the effects of fishing. A qualitative assessment indicated that the only fishing related activities to have moderate or high impact on S. megalops were those associated with ' capture fishing ' of the otter trawl, Danish seine, gillnet and automatic longline methods. A semi - quantitative assessment ranked S. megalops at risk because of its low biological productivity and, possibly, its catch susceptibility from cumulative effects across the separate fishing methods. Finally, a quantitative assessment showed that population growth is slow even under the assumption of density - dependent compensation where the fishing mortality rate equals the natural mortality rate. Therefore, conservation and management for sustainable use of S. megalops will require a close control of fishing mortality due to the low capacity of this species to withstand fishing pressure.
Thesis (Ph.D.)--School of Earth and Environmental Sciences, 2006.

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Braccini, Juan Matías. "Assessment of ecological risks from effects of fishing to Piked Spurdog (Squalus megalops) in South-Eastern Australia". 2006. http://thesis.library.adelaide.edu.au/public/adt-SUA20060519.153928.

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Thesis (Ph.D.) -- University of Adelaide, School of Earth and Environmental Sciences, Discipline of Environmental Biology, 2006.
"January 2006" Bibliography: pages 188-209. Also available in print form.

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Libri sul tema "Pike fishing"

Phillips, Dave. Pike. Henlow Camp: Beekay, 1990.

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Watson, John. Pike. London: Ward Lock, 1989.

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Gay, Martin. Pike. Woodbridge: Boydell, 1989.

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Whitehead, Ken. Ken Whitehead's pike fishing. Newton Abbot: David & Charles, 1987.

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Go fishing for pike. Sparkford: Oxford Illustrated, 1990.

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Holgate, James. Big water pike fishing. Lancaster: Cast Publications, 1989.

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Holgate, James. Big water pike fishing. Lancaster: Cast Publications, 1990.

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Northern pike & muskie. Minnetonka, Minn: Cy DeCosse Inc., 1992.

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Harding, Harry. Pike perch fishing Yorkshire guide. [Leeds?]: H. Harding, 1995.

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Sternberg, Dick. How to catch pike & muskie. Minnetonka, Minn: North American Fishing Club, 2000.

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Più fonti

Capitoli di libri sul tema "Pike fishing"

Pierce, Rodney B. "Recreational and Commercial Fishing". In Northern Pike, 71–90. University of Minnesota Press, 2012. http://dx.doi.org/10.5749/minnesota/9780816679546.003.0002.

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Čanak, Stevan, Jonel Subić e Marko Jeločnik. "Current State of Fish Production on Carp Farms in Serbia". In Agricultural Management Strategies in a Changing Economy, 80–99. IGI Global, 2015. http://dx.doi.org/10.4018/978-1-4666-7521-6.ch004.

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In the Serbian fishing industry, carp breeding in pond is the most important activity. Analysis has shown that breeding may be organized in a two-level semi-intensive system, or in a fully intensive breeding system. Carp farms in Serbia cover any area of around 10,000 ha, with an annual restocking of young fish at around 8,600 ha. Species usually bred include carp, bighead carp, silver carp, grass carp, catfish, pike, and perch. By the level of production of edible fish in carp ponds, with an average production level of 5,000-7,000 tons of fish annually, Serbia takes an important place in Europe. In the chapter, the authors calculate several performance indicators of production for all carp farms, and the results show that by the production intensity Serbia is highly positioned in Europe.

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"Muskellunge Management: Fifty Years of Cooperation Among Anglers, Scientists, and Fisheries Biologists". In Muskellunge Management: Fifty Years of Cooperation Among Anglers, Scientists, and Fisheries Biologists, a cura di Marcus J. Divens, William P. Baker, Bruce D. Bolding e Randall S. Osborne. American Fisheries Society, 2017. http://dx.doi.org/10.47886/9781934874462.ch14.

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Abstract.—Tiger muskellunge (Muskellunge Esox masquinongy × Northern Pike E. lucius) growth, condition, and diet, as well as the effect of stocking on Northern Pikeminnow Ptychocheilus oregonensis, were studied at Curlew Lake, Washington from 2001 to 2006. Curlew Lake (373 ha) was stocked with tiger muskellunge beginning in 1998 to reduce an overabundant Northern Pikeminnow population and to create a unique trophy fishery. Historically, Curlew Lake had provided good fishing opportunity for stocked Rainbow Trout Oncorhynchus mykiss, as well as naturally reproducing Largemouth Bass Micropterus salmoides and Smallmouth Bass M. dolomieu. The quality of trout fishing, however, had declined throughout the 1990s, commensurate with anecdotal observations of increased numbers of Northern Pikeminnow in the sport catch. To monitor changes in species relative abundance, the lake was sampled annually in the fall with standardized boat electrofishing surveys. Additionally, the lake was sampled by boat electrofishing monthly, from spring through fall, to collect tiger muskellunge diet samples by gastric lavage. Rainbow Trout and Northern Pikeminnow were the most important prey species for tiger muskellunge in Curlew Lake while Largemouth Bass were a distant third. Diet varied seasonally, with Rainbow Trout being the most important prey during spring, while Northern Pikeminnow was most important in summer. Both Rainbow Trout and Northern Pikeminnow were important in the fall. The relative abundance of Northern Pikeminnow in Curlew Lake significantly declined over the duration of the study. The high proportion of Northern Pikeminnow observed in the tiger muskellunge diet analysis indicates that the reduction can be attributed to the added presence of tiger muskellunge to the community. Therefore, the goal of Northern Pikeminnow population reduction through tiger muskellunge introduction (biological control via predation) has been successful. Continued biannual monitoring of the fish community to assess Northern Pikeminnow abundance should provide the necessary data to refine future tiger muskellunge stocking rates in Curlew Lake.

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DeGeare, Joe. "Pipe Sticking". In The Guide to Oilwell Fishing Operations, 13–23. Elsevier, 2003. http://dx.doi.org/10.1016/b978-0-12-420004-3.00005-8.

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DeGeare, Joe, David Haughton e Mark McGurk. "Pipe Sticking". In The Guide to Oilwell Fishing Operations, 12–22. Elsevier, 2003. http://dx.doi.org/10.1016/b978-075067702-8/50006-2.

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DeGeare, Joe. "Parting the Pipe String". In The Guide to Oilwell Fishing Operations, 45–53. Elsevier, 2003. http://dx.doi.org/10.1016/b978-0-12-420004-3.00007-1.

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DeGeare, Joe, David Haughton e Mark McGurk. "Parting the Pipe String". In The Guide to Oilwell Fishing Operations, 43–51. Elsevier, 2003. http://dx.doi.org/10.1016/b978-075067702-8/50008-6.

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DeGeare, Joe, David Haughton e Mark McGurk. "Jarring Stuck Pipe or Tools". In The Guide to Oilwell Fishing Operations, 59–66. Elsevier, 2003. http://dx.doi.org/10.1016/b978-075067702-8/50010-4.

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DeGeare, Joe. "Coiled-Tubing-Conveyed Tubing and Drill-Pipe Cutting". In The Guide to Oilwell Fishing Operations, 191–94. Elsevier, 2003. http://dx.doi.org/10.1016/b978-0-12-420004-3.00029-0.

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DeGeare, Joe, David Haughton e Mark McGurk. "Coiled-Tubing-Conveyed Tubing and Drill-Pipe Cutting". In The Guide to Oilwell Fishing Operations, 180–84. Elsevier, 2003. http://dx.doi.org/10.1016/b978-075067702-8/50030-x.

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Atti di convegni sul tema "Pike fishing"

Mohanna, Assaad, Mark Voghell, Aref Alali, Rami Bakir e Ahmad Al-Mousa. "A Step Change in Fishing Efficiency: Recovering Stuck Pipe Using the Fishing Agitation Tool". In SPE Saudi Arabia Section Technical Symposium and Exhibition. Society of Petroleum Engineers, 2012. http://dx.doi.org/10.2118/160880-ms.

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Nicolescu, Adrian, Jerry Wayne Fisher, Mohammed Aleemul Haq, Thomas F. Bailey e Alexander Lazarev. "Drilling Intervention - Milling and Fishing of High Strength Aluminum Drill Pipe". In North Africa Technical Conference and Exhibition. Society of Petroleum Engineers, 2012. http://dx.doi.org/10.2118/149693-ms.

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Voghell, Mark Louis, Assaad Kamel Mohanna, Christopher Hanley, Cristinel Al-Khiriseh, Ahmed Al-Mousa e Ali Al-Amri. "Downhole Vibration Analysis: Fishing Agitation Tool Efficiency in Stuck Pipe Recovery". In SPE/IADC Middle East Drilling Technology Conference & Exhibition. Society of Petroleum Engineers, 2013. http://dx.doi.org/10.2118/166745-ms.

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Voghell, Mark, Assaad Mohanna, Christopher Hanley, Cristinel Al-Khiriseh, Ahmed Mousa e Ali Al-Amri. "Downhole Vibration Analysis: Fishing Agitation Tool Efficiency in Stuck Pipe Recovery". In SPE/IADC Drilling Conference. Society of Petroleum Engineers, 2013. http://dx.doi.org/10.2118/163516-ms.

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Allegretti, Gianluca, Marco Lerose, Alessandro Mangione, Stefano Di Vincenzo, Salvatore Luppinan, Julio Cervantes, Mohamed Lamine Tarchi et al. "A New Rigless Approach for Fishing a Stuck and Parted Coiled Tubing in a Live Well". In ADIPEC. SPE, 2022. http://dx.doi.org/10.2118/211551-ms.

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Abstract Usually, the preferred way to restore production in wells with accessibility heavily compromised is by rig workover activity. However, a preliminary approach in rigless mode followed by rig activity can be even more effective in the presence of several critical issues. Here we illustrate the methodology and technical solutions adopted to perform a challenging rigless fishing job to make the subsequent rig workover operation quicker, cheaper, and safer. A workflow was developed for a course of actions to perform a complex fishing intervention while fully respecting the well control requirements. Considering the well status—1½-in. coiled tubing (CT) stuck in 4½-in. tubing at 7582 ft due to scale buildup, parted in two segments side by side, top of fish at 1345 ft and with no injectivity in the well—it was decided to adopt a fit-for-purpose rigless strategy by combining conventional fishing tools (flow release overshot, continuous cutting overshot) with a CT anchor, which guided the electrical line (EL) cutting tools inside the pipe while keeping it in tension. To accomplish the target, a robust design, with multiple contingency plans was properly defined and successfully implemented. In addition to the main constraint of having a CT pipe parted and stuck in the tubing, the scale deposit prohibited killing the well by bullheading. Consequently, the overall fishing operations were planned and managed as if the well was alive. The alternate use of CT fishing tools, CT anchor, and EL cutting operations allowed recovering approximately 6958 ft over a total length of 7398 ft, leaving just 440 ft of CT pipe stuck in hole inside the scale deposit (with the new top of fish at 7142 ft). As a result, a complex well situation, which could have led to a long and expensive rig operation, was successfully approached in rigless mode, leaving the well ready for a simpler workover activity. The use of Continuous Cutting Overshot (CCO), through a standard "cut & drop" approach, was limited by the CT lubricator height. An innovative fishing approach was then deployed: a proper CT anchor BHA, to latch and hang the CT pipe in the tubing wall, was run. The beveled shape of the CT anchor allowed EL tools to enter inside the CT pipe and cut the same above the free point, so recovering longer sections of pipe.

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Savchenko, Svetlana, e Michail Zhilin. "Fishing in trans-Ural Mesolithic (based on materials from pile-dwelling settlements)". In SUBSISTENCE STRATEGIES IN THE STONE AGE, DIRECT AND INDIRECT EVIDENCE OF FISHING AND GATHERING. Institute for the History of Material Culture Russian Academy of Science, 2018. http://dx.doi.org/10.31600/978-5-907053-00-7-2018-174-176.

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Vasilieva, Natalia. "Field Conservation of Waterlogged Organic Archaeological Finds of the Pile-Dwelling Site Serteya II". In SUBSISTENCE STRATEGIES IN THE STONE AGE, DIRECT AND INDIRECT EVIDENCE OF FISHING AND GATHERING. Institute for the History of Material Culture Russian Academy of Science, 2018. http://dx.doi.org/10.31600/978-5-907053-00-7-2018-229-232.

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Franco Delgado, Ernesto, Muhammad Talha Khan, Rao Shafin Ali Khan, Nestor Molero, Anna Gilash, Rafael Fernando Mattos, Maged Basha, Tony Laplante e Mark Szeller. "Fishing More than 8,300-ft of U-Shaped Collapsed Electric-Cable-Equipped Coiled-Tubing: A Case Study from United Arab Emirates". In SPE/ICoTA Well Intervention Conference and Exhibition. SPE, 2022. http://dx.doi.org/10.2118/209034-ms.

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Abstract (300 words) During the completion phase of an unconventional well in the United Arab Emirates (UAE), an electric-cable-equipped coiled tubing (ECE-CT) had to be cut and dropped in hole while performing a plug-and-perf campaign. The CT service provider and tool manufacturer jointly redesigned a specific fishing tool for a flat-shaped collapsed CT pipe, which allowed the latching of the U-shaped collapsed ECE-CT pipe and its safe recovery. The fish and potential solutions were analyzed by the engineering teams from operator, CT service provider, and tool manufacturer. Because of the U-shape of the fish, the existing techniques of conventional overshot for rounded profiles and flat overshot for flat-shaped profiles could not be applied. The U-shape of the fish was replicated and used to create the overshot entry guide. The prototype was manufactured and tested at surface to ensure the profile was getting inside. The tool-string included an indexing tool to allow controlled rotation, which was key to the success of that fishing operation. Upon completion of the last perforating stage in a 10-stage completion in the well, the ECE-CT pipe accidentally parted and then collapsed when it was being retrieved to surface. The CT operator activated the pipe/slips ram, but a leak was observed. The 2-in. CT pipe was cut and dropped by activating the shear/seal ram, thus leaving 8,360-ft of CT pipe in the well. A lead-impression-block (LIB) run to identify the fish profile found the U-shape fish at a depth of 6,686-ft. The electric cable did not cover the top of the fish, thus reducing the risk of the retrieval operation. Despite several attempts made with the available fishing tools for rounded profiles, even when latching was achieved, the fish was lost. Inspection of the overshot after it reached surface showed the presence of broken slips due to uneven load transmission. After analysis of both the top of fish and available fishing tools, a hybrid rounded/flat overshot was designed to allow the U-shaped CT pipe to get inside the overshot and the traveling slip to latch onto the collapsed body, allowing higher contact area and resulting in the proper latch and retrieval of the collapsed ECE-CT pipe. Because a suitable overshot was not available, the operation required designing, producing, and implementing a customized hybrid semi-rounded/flat overshot for U-shaped profiles, as well as the development of a new methodology, to successfully latch and recover the pipe. The availability of a tools manufacturer inside the country allowed a fast response, it only took 7-days to design, manufacture, and test the tool prototype, thus limiting the time the well remained idle.

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Machocki, Krzysztof Karol, Abdulwahab Aljohar, David Zhan e Ayodeji Abegunde. "A New Down Hole Tool and Approach To Release Differentially Stuck Pipe". In Abu Dhabi International Petroleum Exhibition & Conference. SPE, 2021. http://dx.doi.org/10.2118/207964-ms.

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Abstract A new down hole system and method to use for releasing stuck pipes is presented. New system design, features and limits are compared to commonly used techniques for releasing stuck pipe showing benefits of the new system when dealing with differential stuck pipe incidents. The new down hole system is capable to deliver much greater forces when compared to jars and other down hole accelerators near the stuck point. This system can generate over 40G`s lateral forces continuously down the hole acting on the stuck pipe area. The system can be integrated into a Bottom Hole Assembly (BHA) and activated once drill string become stuck or run as a part of the remediate assembly. Different aspects of two types of assemblies are described outlining the benefits and drawbacks. The author will discuss in details the background and rationale to the new technology, including a review of differential sticking challenges and functionality of this new system. The new system was compared to the most commonly used techniques for releasing differentially stuck pipe. Previously not releasable stuck pipe forces of over 1,000,000 lb. can now be overcome with the presented new approach to generate down hole forces near the stuck place. Flexibility in system integration and deployment allows for further optimization in BHA design and cost affective fishing operations in dedicated hole sections. This new approach can be implemented to release the most challenging stuck pipe mechanisms in drilling to minimize NPT and cost associated with stuck pipe, remedial operations and sidetracks. Similar approach can be utilized to release differentially stuck pipes, tubing and completions. The novelty of this stuck pipe release system is the entire down hole system and operations of the overall system using new approach to generate large shocks down the hole. Additional novelty is related to flexibility during integration and deployment of this system. Similar to current shock tools, this system can be placed in BHA, fishing type assemblies and also pumped down inside of the stuck drill string to save time and cost.

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Ouchi, Kazuyuki, Seiko Ogiwara, Eiichi Kobayashi, Kenji Fukumiya, Masayuki Yonezawa e Ken Kato. "Ocean Nutrient Enhancer: Creation of Fishing Ground Using Deep Ocean Water". In ASME 2002 21st International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2002. http://dx.doi.org/10.1115/omae2002-28355.

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The project to create the fishing ground in the open ocean by rising Deep Ocean Water (DOW) and discharging it in the euphotic layer where photosynthesis can be done by DOW’s rich nutrient salt has been carried out since April 2000, sponsored by Japanese Government Fisheries Agency and Marino-Forum 21. The name of this machine is called Ocean Nutrient Enhancer (ONE for short). As the output of the first year research which includes tank tests, computer simulations and feasibility studies, following outline of the ONE’ concept is proposed. • Rising DOW of 500m depth and 500,000m3/day with the special impeller which makes density current in the euphotic region. • Power for driving the impeller is supplied by OTEC (Ocean Thermal Energy Conversion) engine using a cold characteristics of DOW. • Adopting the configuration of submerged spar type as a floating construction to work safely and continuously against the rough sea. • Upending of the riser pipe is considered for the reliable and cost-effective setting up operation. From the above research, the ONE’s effectiveness is confirmed significantly.

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