Artykuły w czasopismach: „PIKE-L”

1

Brend, Ruth M. "Kenneth L. Pike". Language 77, nr 3 (2001): 562–66. http://dx.doi.org/10.1353/lan.2001.0132.

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Kang, Seong Su, Zhentao Zhang, Xia Liu, Fredric P. Manfredsson, Li He, P. Michael Iuvone, Xuebing Cao, Yi E. Sun, Lingjing Jin i Keqiang Ye. "α-Synuclein binds and sequesters PIKE-L into Lewy bodies, triggering dopaminergic cell death via AMPK hyperactivation". Proceedings of the National Academy of Sciences 114, nr 5 (17.01.2017): 1183–88. http://dx.doi.org/10.1073/pnas.1618627114.

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The abnormal aggregation of fibrillar α-synuclein in Lewy bodies plays a critical role in the pathogenesis of Parkinson’s disease. However, the molecular mechanisms regulating α-synuclein pathological effects are incompletely understood. Here we show that α-synuclein binds phosphoinositide-3 kinase enhancer L (PIKE-L) in a phosphorylation-dependent manner and sequesters it in Lewy bodies, leading to dopaminergic cell death via AMP-activated protein kinase (AMPK) hyperactivation. α-Synuclein interacts with PIKE-L, an AMPK inhibitory binding partner, and this action is increased by S129 phosphorylation through AMPK and is decreased by Y125 phosphorylation via Src family kinase Fyn. A pleckstrin homology (PH) domain in PIKE-L directly binds α-synuclein and antagonizes its aggregation. Accordingly, PIKE-L overexpression decreases dopaminergic cell death elicited by 1-methyl-4-phenylpyridinium (MPP+), whereas PIKE-L knockdown elevates α-synuclein oligomerization and cell death. The overexpression of 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) or α-synuclein induces greater dopaminergic cell loss and more severe motor defects in PIKE-KO and Fyn-KO mice than in wild-type mice, and these effects are attenuated by the expression of dominant-negative AMPK. Hence, our findings demonstrate that α-synuclein neutralizes PIKE-L’s neuroprotective actions in synucleinopathies, triggering dopaminergic neuronal death by hyperactivating AMPK.

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Brend, Ruth M. "Kenneth L. Pike 1912-2000". Functions of Language 8, nr 1 (3.12.2001): 147–51. http://dx.doi.org/10.1075/fol.8.1.08bre.

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Gorlée, Dinda L. "Kenneth L. Pike and science fiction". Semiotica 2015, nr 207 (1.10.2015): 217–31. http://dx.doi.org/10.1515/sem-2015-0043.

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AbstractKenneth L. Pike’s tagmemic explanation of his etic-emic equivalence corresponds to the notion of “approximate” translation. According to a weaker version of the Sapir-Whorf hypothesis, Pike’s cross-cultural and multilingual perspective of Bible translation approximates the duality and triadicity of Peirce’s immediate/emotional, dynamical/energetic, and final/logical interpretants. Pike’s astronautical examples of the artificial language Kabala-X translated into English and the science fiction story of the Earthmen who invaded Mars are fictional and creative artifacts of human-alien cryptography leading, as argued here, to false semio-logical reasoning.

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NYGREN, AXEL, PER EDLUND, ULF HIRSCH i LARS ÅHSGREN. "CYTOLOGICAL STUDIES IN PERCH (PERCA FLUVIATILIS L.), PIKE (ESOX LUCIUS L.), PIKE-PERCH (LUCIOPERCA LUCIOPERCA L.), AND RUFF (ACERINA CERNUA L.)". Hereditas 59, nr 2-3 (2.09.2009): 518–24. http://dx.doi.org/10.1111/j.1601-5223.1968.tb02192.x.

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Artamonov, Yu E., A. N. Klivenko, Ye N. Artamonova i Ye P. Yevlampiyeva. "ECOLOGICAL ASSESSMENT OF THE CONTENT OF HEAVY METALS IN FISH OF THE RIVER IRTYSH". Bulletin of Shakarim University. Technical Sciences, nr 1(9) (31.03.2023): 6–16. http://dx.doi.org/10.53360/2788-7995-2023-1(9)-1.

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The article presents the results of a study of surface waters and fish (perch (Perca fluviatilis L.), carp (Cyprinus carpio L.), bream (Abramis brama L.), pike (Esox lucius L.) of the Irtysh river. The content of Cu and Pb in the organs and tissues of fish living in the Irtysh River within the city of Semey was determined by the ditizon photometric method. The ecological assessment of the results indicates that the concentrations of Cu and Pb in the studied fish specimens do not exceed the MPC. A significant difference in the specific features of the accumulation of heavy metals has been established, depending on the type of fish nutrition and the time of year. The Pb content in various organs of perch, carp, bream and pike ranges from 0.062 mg/kg to 0.083 mg/kg. The highest concentration of Cu is observed in predatory fish (3.27 mg/kg), the lowest – in planktonivores (2.82 mg/kg). Pb also mainly accumulates in pike (0.073 mg/kg). In spring, the content of Pb in the gills of perch and pike increases, Cu – in the gills of bream and pike. The maximum concentrations of Cu in fish were observed in summer, which is associated with an increase in the food supply. The Pb content in summer, on the contrary, decreases due to its adsorption by suspended solids and deposition with them into bottom sediments.

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Schwalme, K., i W. C. Mackay. "The influence of exercise–handling stress on blood lactate, acid–base, and plasma glucose status of northern pike (Esox lucius L.)". Canadian Journal of Zoology 63, nr 5 (1.05.1985): 1125–29. http://dx.doi.org/10.1139/z85-170.

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Changes in blood lactate, pH, Pco2, and plasma [Formula: see text] and glucose were measured during recovery from exercise–handling stress in chronically cannulated northern pike (Esox lucius L.). Exercise was induced by lifting pike out of water (three 30-s periods of emersion alternated with 30-s periods of water submersion), while they were inside tubular plastic chambers. Large depressions in blood pH and plasma [Formula: see text] occurred within minutes after exercise. Initially, the acidosis was of mixed respiratory (elevated Pco2) and metabolic (H+ release from the muscle) origin. Although the respiratory acidosis was corrected in 2 h, 8 h was required to return blood pH to preexercise levels. A large accumulation of lactate anion in the blood occurred after exercise, the increase by 2 h (12.8 mmol L−1), being approximately equal to the metabolic acid load. These results conflict with previous reports on muskellunge (Esox masquinongy M.), in which blood lactate elevation following exercise was small (2.5 mmol L−1) and greatly exceeded by the metabolic H+ load (7.0 mmol L−1). By 2 h after exercise the plasma glucose level of pike had increased by 8.8 mmol L−1 and the return to preexercise levels was almost complete by 12 h. Intraarterial infusion of a large sodium lactate load elevated plasma glucose level by only 1.7 mmol L−1, indicating that postexercise hyperglycemia in pike is a response to stress and not simply a consequence of lactate removal by conversion into glucose.

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Trella, Marek, i 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, nr 2 (1.06.2021): 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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Ahne, W. "Viral infection cycles in pike (Esox lucius L.)". Journal of Applied Ichthyology 1, nr 2 (lipiec 1985): 90–91. http://dx.doi.org/10.1111/j.1439-0426.1985.tb00417.x.

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BABALUK, J. A., i J. F. CRAIG. "Tetracycline marking studies with pike, Esox lucius L." Aquaculture Research 21, nr 3 (lipiec 1990): 307–16. http://dx.doi.org/10.1111/j.1365-2109.1990.tb00469.x.

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Řehulka, J. "Testicular tumour in northern pike, Esox lucius L". Journal of Fish Diseases 36, nr 7 (24.01.2013): 669–73. http://dx.doi.org/10.1111/jfd.12045.

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HARPER, DAVID G., i ROBERT W. BLAKE. "Fast-Start Performance of Rainbow Trout Salmo Gairdneri and Northern Pike Esox Lucius". Journal of Experimental Biology 150, nr 1 (1.05.1990): 321–42. http://dx.doi.org/10.1242/jeb.150.1.321.

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The escape performances of rainbow trout Salmo gairdneri (Richardson) and northern pike Esox lucius (Linnaeus) (mean lengths 0.32 m and 0.38 m, respectively) were measured with subcutaneously implanted accelerometers. Acceleration-time plots reveal two types of fast-starts for trout and three for pike. Simultaneous high-speed ciné films demonstrate a kinematic basis for these differences. Trout performing C-shaped fast-starts produce a unimodal acceleration-time plot (type I) while during S-shaped fast-starts a bimodal accelerationtime plot (type II) results. Pike also exhibit similar type I and II fast-starts, but also execute a second S-shaped fast-start that does not involve a net change of direction. This is characterized by a trimodal acceleration-time plot (type III). Intraspecific and interspecific comparisons of distance, time, mean and maximum velocity, and mean and maximum acceleration rate indicate that fast-start performance is significantly higher for pike than for trout, for all performance parameters. This indicates that performance is related to body form. Overall mean maximum acceleration rates for pike were 120.2±20.0 ms−2 and 59.7±8.3 ms−2 for trout. Performance values directly measured from the accelerometers exceed those previously reported. Maximum acceleration rates for single events reach 97.8ms−2 and 244.9ms−2 for trout and pike, respectively. Maximum final velocities of 7.06ms−2 (18.95 Ls−2) were observed for pike and 4.19 ms−2 (13.09 Ls−2) for trout, where L is body length; overall mean maximum velocities were 2.77 ms−2 for trout and 3.97 ms−2 for pike.

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Khomenchuk, V. O., O. O. Rabcheniuk, V. V. Futryk i V. Z. Kurant. "ОСОБЛИВОСТІ ОСМОТИЧНОЇ РЕЗИСТЕНТНОСТІ ЕРИТРОЦИТІВ ТА ВМІСТУ ГЕМОГЛОБІНУ У КРОВІ РИБ ЗА ДІЇ ФЕРУМУ (III)". Scientific Issue Ternopil Volodymyr Hnatiuk National Pedagogical University. Series: Biology 79, nr 1-2 (6.06.2020): 62–67. http://dx.doi.org/10.25128/2078-2357.20.1-2.8.

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The osmotic resistance of erythrocytes and the content of hemoglobin in the blood of carp (Cyprinus carpio L.) and pike (Esox lucius L.) under the action of Fe3+ ions at concentrations of 0.2 and 0.5 mg/dm3, were under study which corresponded to 2 and 5 maximum permissible concentration (MPC). The research demonstrated that increased concentrations of Fe3+ ions lead to changes in the osmotic resistance of erythrocytes and the content of hemoglobin in the blood of carp and pike. The findings suggest that high concentrations of Iron (5 MPC) in carp lead to a decrease in the resistance of erythrocyte membranes, and in pike it led to increased osmotic resistance of erythrocytes, which is apparently due to different mechanisms of adaptation of fish erythrocyte membranes to adverse aquatic environment. Species-specificity is also characterized by changes in the content of hemoglobin in the blood of fish species which were researched. An increased amount of pigment in the blood of carp and a decreased amount of hemoglobin in pike under the action of 5 MPC of metal ions was established. The obtained results can be used to assess the physiological condition of fish and water quality under conditions of contamination of watercourses with metals.

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Ladd, D. Robert. "The American Four-Level Analysis of Intonation Contours". Historiographia Linguistica 42, nr 1 (26.05.2015): 119–37. http://dx.doi.org/10.1075/hl.42.1.07lad.

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Summary The four-level analysis of English intonation prevalent in American structuralist work from the mid-1940s to the late 1960s is variably credited to 1945 publications by both Kenneth Lee Pike (1912–2000) and Rulon S. Wells (1919–2008). However, Pike’s work was the basis of published language teaching materials as early as 1942. The author reports a brief correspondence with Pike in 1989, which makes clear that Pike felt that his own contribution was underappreciated in the “intellectual climate” of Bloomfieldian linguistics. Bernard Bloch (1907–1965) and especially George L. Trager (1906–1992) appear to have influenced the reception of Pike’s work and to have overstated the credit due to Wells.

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Wolska-Neja, Bogusława, i Zbigniew Neja. "Grow-out of northern pike (Esox lucius L.) larvae under uncontrolled conditions". Acta Ichthyologica et Piscatoria 36, nr 2 (31.12.2006): 105–12. http://dx.doi.org/10.3750/aip2006.36.2.03.

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Peat, Tyler B., Lee F. G. Gutowsky, Susan E. Doka, Jonathan D. Midwood, Nicholas W. R. Lapointe, Bogdan Hlevca, Mathew G. Wells, Rick Portiss i Steven J. Cooke. "Comparative thermal biology and depth distribution of largemouth bass (Micropterus salmoides) and northern pike (Esox lucius) in an urban harbour of the Laurentian Great Lakes". Canadian Journal of Zoology 94, nr 11 (listopad 2016): 767–76. http://dx.doi.org/10.1139/cjz-2016-0053.

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Understanding how individuals are distributed in space and time, as well as how they interact with dynamic environmental conditions, represent fundamental knowledge gaps for many fish species. Using acoustic telemetry tags, we monitored the temperatures and depths used by northern pike (Esox lucius L., 1758) and largemouth bass (Micropterus salmoides (Lacepède, 1802)) in Toronto Harbour (Lake Ontario). Northern pike and largemouth bass had similar thermal experiences throughout the year, except during summer, when northern pike were observed in cooler waters than largemouth bass. Both species used different depths throughout the year, with northern pike occupying deeper depths. Statistical modelling indicated that depth usage was influenced by all variables (season, species, and body size) and interactions between them, whereas thermal preferences were influenced by the main effects and interactions between species:season and species : body size. Both species were observed at temperatures warmer than those in the vicinity of nearby telemetry stations, but as station temperatures exceeded 20 °C, northern pike moved into cooler water, indicating active thermoregulation. These data will be useful for refining our understanding of the spatial ecology of fish and for informing fisheries and habitat management in this and other urban harbours of the Laurentian Great Lakes.

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Mickiewicz, Maciej, i Marek Trella. "Economic effectiveness of pike (Esox lucius L.) stocking based on the example of selected lakes in East European Plain with consideration of their natural conditons". Fisheries & Aquatic Life 27, nr 3 (1.09.2019): 136–48. http://dx.doi.org/10.2478/aopf-2019-0016.

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Abstract The aim of the study was to assess the economic effectiveness of pike (Esox lucius L.) stocking based on the value of fish caught with commercial fishing gears and the value of stocking material introduced into 44 lakes in the Ełk Lake District in northeastern Poland. The effectiveness of stocking is presented against the background of lake environmental conditions in the context of their natural potential for pike populations to inhabit and develop in them. The data analyzed regarded the size and value of catches and stocking from 1996-2017 that was obtained from an entity authorized to exploit fisheries. Information on selected lake morphometric, morphological, and environmental parameters was also obtained from this source. The value of pike catches in the analyzed period was characterized by a high, stabile level, and the stocking level increased. The indicator of the stocking economic effectiveness was at a high average annual level in excess of 3.9 PLN of catches per 1.0 PLN for stocking, but it decreased during the period analyzed. The high stocking effectiveness in the studied lakes was determined by, inter alia, natural conditions, stocking material quality, properly performed stocking, and efficient exploitation. However, it can be concluded that it is mainly stocking that maintains pike catches at a high, relatively stable level in the lakes analyzed. Additionally, new methods of pike population management are discussed, e.g., catch and release.

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Franke, William. "Passage through Hell: Modernist Descents, Medieval Underworlds.David L. Pike". Speculum 74, nr 3 (lipiec 1999): 808–11. http://dx.doi.org/10.2307/2886836.

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Kangur, P. "FOOD OF PIKE, Esox lucius L., IN LAKE PEIPSI". Proceedings of the Estonian Academy of Sciences. Biology. Ecology 49, nr 1 (2000): 109. http://dx.doi.org/10.3176/biol.ecol.2000.1.10.

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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, nr 3 (2.10.2019): 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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Khalturyn, M. B. "Morphobiological characteristics of common pike (Esox lucius L.) in small reservoirs of complex purpose in Sumy and Kyiv regions". Animal Biology 24, nr 3 (październik 2022): 22–26. http://dx.doi.org/10.15407/animbiol24.03.022.

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The purpose of the work was to conduct a morphobiological analysis of common pike (Esox lucius L.) from two reservoirs similar in their parameters and conditions, and to determine the difference between the populations of these species due to various anthropogenic factors. The pike from the Sumy region has a more slender body, as it is indicated by displaced dorsal (5.76) and anal fins (9.19), a larger body width (2.47) and an enlarged tail stem (9.62), a more elongated head with a snout and upper jaw (6.10, 11.37, 4.9, respectively). Such signs may indicate that the pike hunts for prey that has the maximum size ac-cording to a specimen. The indicators of the pike from the Kyiv region are somewhat different and indicate that the predator makes very rapid and fairly long-distance attacks on prey, despite obstacles such as macrophytes and other aquatic vegetation, which can be evidenced by a larger width of the forehead (13.32), head height (4.16) and head height at the nape of the neck (3.56). Also, big eyes (4.91) and an enlarged lower jaw (9.89) can indicate speed and big jerks. Based on biological indicators, we can conclude that the pike from Sumy region is more fattened, which is confirmed by measurements and coefficients of its fatness. Therefore, it is fleshier, which, first of all, affects the quality of the fish as a commodity. As for the pike from the Kyiv re-gion, it is somewhat smaller with lower fatness coefficients, which may indicate greater expenditure of energy for obtaining food. This costliness, in our opinion, is related to competition from two more predatory fish species — perch and zander, which are common in the reservoir, and possibly to the size of the reservoir itself, which is four times larger. We consider it expedient to diversify the ichthyofauna of the reservoir in the Paryshkiv village, in particular peaceful species of fish, in order to remove or reduce the trophic competition of predators.

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Bonisławska, Małgorzata, Adam Tański, Arkadiusz Nędzarek i Agnieszka Tórz. "Effect of the coagulants PAX and PIX on the embryonic development of pike (Esox lucius L.)". Limnological Review 12, nr 3 (1.03.2012): 125–32. http://dx.doi.org/10.2478/v10194-012-0052-6.

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AbstractThe study examined the development of pike (Esox lucius L.) roe in water containing variously concentrated coagulants PIX®113 and PAX®18, which are increasingly being used in Poland as a method of lake reclamation. The genital products came from spawners caught from a natural water body (Lake Przybiernów). The eggs were incubated in water taken from the same lake, and subjected to the process of phosphorus and iron precipitation with coagulants. Based on the results, it was found that the coagulants used in the experiment inhibit the embryogenesis of pike by the formation of aggregates falling to the bottom, reducing the percentage of live embryos and affecting the size and malformation of the hatching larvae.

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Aalberg, K., L. Koščová, Ľ. Šmiga, P. Košuth, J. Koščo, M. Oros, D. Barčák i P. Lazar. "A Study of Fish Lice (Argulus Sp.) Infection in Freshwater Food Fish". Folia Veterinaria 60, nr 3 (1.09.2016): 54–59. http://dx.doi.org/10.1515/fv-2016-0030.

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Abstract Argulus sp., commonly referred to as fish lice, are crustacean ectoparasites of fishes. The hematophagous parasites attach to and feed off the integument of their hosts. Outbreaks of epizootics have been reported worldwide, causing mass mortalities and having serious economic implications for fish farms and culture efforts. Argulus fish lice may also serve as vectors of infectious diseases and as intermediate hosts of other parasites. Two native European species, A. foliaceus and A. coregoni, as well as the invasive Japanese fish louse A. japonicus, have previously been recorded in Slovakia. This study investigated samples collected at fish farms and culture sites of Common carp (Cyprinus carpio L.), Pike-perch (Sander lucioperca L.) and Brook trout (Salvelinus fontinalis M.) in Eastern Slovakia, as well as samples collected from live fish imported to the Slovak Republic. A quantitative description of the of Argulus sp. was recorded from each locality. Samples from Common carp were identified as the invasive A. japonicus, and samples from Pike-perch and Brook trout were identified as A. foliaceus. Evidence of a mixed infection of Pike-perch with both A. foliaceus and A. japonicus was found in samples from Zemplínska Šírava, which was substantiated by electron microscopic examination. Morphometric characteristics were measured and averages and ranges produced for each species and sex.

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Žiliukienė, V., i V. Žiliukas. "Growth of pike Esox lucius L. in Lake Rubikiai (Lithuania)". Journal of Applied Ichthyology 26, nr 6 (27.09.2010): 898–903. http://dx.doi.org/10.1111/j.1439-0426.2010.01517.x.

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Garwood, Russell J., Julia Behnsen, Andrew T. Ramsey, Harriet K. Haysom, Luke J. Dalby, Samuel K. Quilter, James S. Maclaine, Zhijin Wang i Jonathan P. L. Cox. "The functional nasal anatomy of the pike, Esox lucius L." Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology 244 (czerwiec 2020): 110688. http://dx.doi.org/10.1016/j.cbpa.2020.110688.

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Vøllestad, Leif Asbjørn, Jostein Skurdal i Tore Qvenild. "Habitat use, growth, and feeding of pike (Esox lucius L.) in four Norwegian lakes". Archiv für Hydrobiologie 108, nr 1 (25.11.1986): 107–17. http://dx.doi.org/10.1127/archiv-hydrobiol/108/1986/107.

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Stratil, Antonín, Vladimír Tomášek, John R. Clamps i John Williams. "Partial characterization of transferrins of catfish (Silurus glanis L.) and pike (Esox lucius L.)". Comparative Biochemistry and Physiology Part B: Comparative Biochemistry 80, nr 4 (styczeń 1985): 909–11. http://dx.doi.org/10.1016/0305-0491(85)90482-1.

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Grunin, Sergei I., i Alexander V. Shestakov. "BIOLOGY OF NORTHERN PIKE ESOX LUCIUS L . OF TALOVSKOYE L AKE (NORTH-WESTERN KAMCHATKA)". Researches of the aquatic biological resources of Kamchatka and of the north-west part of the Pacific Ocean, nr 55 (23.12.2019): 138–45. http://dx.doi.org/10.15853/2072-8212.2019.55.138-145.

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Žiliukienė, Vida, i Valdemaras Žiliukas. "Spawning population characteristics of pike Esox lucius L. in Lake Rubikiai (Lithuania)". Open Life Sciences 7, nr 5 (1.10.2012): 867–77. http://dx.doi.org/10.2478/s11535-012-0073-9.

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AbstractThe aim of the study was to describe the peculiarities of pike spawning in mesotrophic Lake Rubikiai, to determine the spawning population structure and evaluate the influence of some environmental factors on year-class strength formation. The data were collected in April and May (1994–2011). A total of 1586 individuals were caught. The age of pike ranged from 1 to 12 years; 2–5-yearold males (96.0%) and 3–8-year-old females (89.1%) prevailed. The overall sex ratio of females to males was 1:4.1. One-year-old spawning males (26.5–28.5 cm) and two-year-old spawning females (31.5–35.5 cm) constituted 2.1% and 2.6%, respectively. Water temperature during the spawning period was relatively stable, between 4 and 6°C, during March and increased slightly towards 10°C in the middle of April. No correlation was observed between female length and spawning date. Year-class strength did not correlate with the last day of ice presence and the minimal water level at the end of spawning (WLmin), but statistically significantly negatively correlated with the maximum water level at the beginning of spawning (WLmax) and the difference between WLmax and WLmin. The mean annual survival rate for pike (aged ≥2) was 0.74 and the mean annual instantaneous mortality rate was 0.45.

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Puchkov, A. V., A. S. Druzhinina, E. Y. Yakovlev i P. V. Druzhinin. "Accumulation of radionuclides in fish from the rivers of the northwestern sector of the Russian Arctic". Arctic: Ecology and Economy 13, nr 1 (marzec 2023): 127–37. http://dx.doi.org/10.25283/2223-4594-2023-1-127-137.

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The article presents the analysis of the radionuclide content in fish (perch — Perca fluviatilis L., pike — Esox Lucius L.) living in the rivers (Mezen, Nes and Pechora) of the northwestern sector of the Arctic zone of Russia. In one of the rivers of the study region (the Nes River in the Nenets Autonomous Area), the researchers have revealed the presence of technogenic radionuclides Cs-137 and Sr-90. To assess the distribution of these radionuclides in the fish body, they divided the selected fish samples into separate biological systems: muscle tissue, bone tissue, heads, entrails, a mixture of skin, scales and fins. The largest amount of Cs-137 is contained in the fish muscle tissue (more than 50% of the total radionuclide activity). The greatest amount of Sr-90 is contained in a mixture of skin, scales, fins (47%) and heads (33%) of river perch, while this radionuclide is absent in pike samples. There is a small content of Sr-90 in the bone tissue of river perch. In the absence of other technogenic short-lived radionuclides, the likely reason for the presence of Cs-137 and Sr-90 in the fish of the Nes River is a radioactive trace that appeared during nuclear tests on the Novaya Zemlya archipelago. The main dose-forming radionuclide in the selected fish samples was natural K-40. Its content for pike is estimated at 92% of the total beta activity, for river perch — 86%. The main content of this radionuclide falls on muscle tissue (about 50% for pike and river perch). According to the research results, it is noted that the levels of radioactivity in fish from the Nes River do not exceed the sanitary and hygienic standards established in the Russian Federation in the field of food safety and do not pose a significant radiological risk to the population.

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Tokarczyk, Grzegorz, Grzegorz Bienkiewicz i Patrycja Biernacka. "Susceptibility to Oxidation of Selected Freshwater Fish Species Lipids as a Potential Source of Fish Oil in Dietary Supplements". International Journal of Food Science 2021 (20.08.2021): 1–7. http://dx.doi.org/10.1155/2021/7191639.

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Polyunsaturated fatty acids from the omega 3 family are more and more often supplied to the diet in the form of supplements. The aim of the study was to characterize the lipid fractions of predatory freshwater fish, i.e., pike (Esox lucius L.), perch (Perca fluviatilis L.), and pike perch (Sander lucioperca L.), and omnivorous fish, i.e., bream (Abramis brama L.) and roach (Rutilus rutilus L.). Their technological usefulness in terms of the source of fish oil was determined, depending on the rate and degree of their oxidative changes. UV radiation (photooxidation test) was used as a factor accelerating lipid oxidation. Research has shown that selected species of freshwater fish are characterized by high lipid oxidative stability, due to the availability and speed of delivery to the processing plant. The initial level of lipid oxidation of their meat, expressed by the TOTOX index, in any species did not exceed the value of 7, while the acceptable value was 26. The oil obtained from the meat of omnivorous fish after the photooxidation process was characterized by significantly better oxidative stability compared to the oil from the meat of predatory fish. The oxidation resistance of omnivorous fish oil was shown to be higher than that of predatory fish.

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Georgiev, Andrey Pavlovich, Vyacheslav Anatolievich Shirokov i 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, nr 3 (30.09.2021): 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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Łuczyńska, Joanna, Marek Jan Łuczyński, Beata Paszczyk i Elżbieta Tońska. "Concentration of mercury in muscles of predatory and non-predatory fish from lake Pluszne (Poland)". Journal of Veterinary Research 60, nr 1 (1.03.2016): 43–47. http://dx.doi.org/10.1515/jvetres-2016-0007.

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Abstract Introduction: The study examined the concentration of total mercury and correlation coefficients between fish size or FCF (condition factor) and the content of Hg in muscle tissue of six freshwater fish: bream (Abramis brama L.), roach (Rutilus rutilus L.), whitefish (Coregonus lavaretus L.), vendace (Coregonus albula L.), perch (Perca fluviatilis L.), and pike (Esox lucius L.). Material and Methods: The fish were caught from the Lake Pluszne located in the Olsztyn Lake District (Poland). Mercury was analysed by atomic absorption spectrometry using Milestone DMA-80 (with dual-cell). Results: The content of the element in the muscles of the examined fish was as follows: pike (0.197 mg/kg) ≈ perch (0.173 mg/kg) > vendace (0.114 mg/kg) ≈ roach (0.095 mg/kg) and roach ≈ whitefish (0.065 mg/kg), and whitefish ≈ bream (0.042 mg/kg) (p ≤ 0.05). In all cases, the content of mercury correlated positively with the body weight and total length of the fish. Only the correlation coefficients between mercury concentration and weight or length of bream were slightly higher (0.979 and 0.977 respectively, p ≤ 0.001). The length and weight relationship of the fish was also determined. Conclusion: The results showed that the levels of mercury were lower than the maximum acceptable limit established by the Commission Regulation (EC) No 629/2008 of 2 July 2008. Thus, they are safe from consumer health point of view.

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ÖZTÜRK, M. OGUZ, F. NACI ALTUNEL i M. CEMAL OGUZ. "METAZOAN PARASITES OF PIKE (ESOX LUCIUS L.) FROM LAKE ULUABAT, TURKEY". Israel Journal of Zoology 46, nr 2 (1.01.2000): 119–30. http://dx.doi.org/10.1560/1pcu-4t5v-ca77-x3tj.

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Kallaste, T., i J. Nemliher. "Thermal behaviour of bone apatite of Recent pike (Esox lucius L.)". Proceedings of the Estonian Academy of Sciences. Geology 54, nr 2 (2005): 112. http://dx.doi.org/10.3176/geol.2005.2.03.

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Lucentini, Livia, Antonella Palomba, Hovirag Lancioni, Lilia Gigliarelli, Mauro Natali i Fausto Panara. "Microsatellite polymorphism in Italian populations of northern pike (Esox lucius L.)". Fisheries Research 80, nr 2-3 (wrzesień 2006): 251–62. http://dx.doi.org/10.1016/j.fishres.2006.04.002.

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öZTüRK, M. OGUZ, F. NACI ALTUNEL i M. CEMAL OGUZ. "METAZOAN PARASITES OF PIKE (ESOX LUCIUS L.) FROM LAKE ULUABAT, TURKEY". Israel Journal of Zoology 46, nr 2 (1.01.2000): 119–30. http://dx.doi.org/10.1092/1pcu-4t5v-ca77-x3tj.

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THOMPSON, J. S., i M. MIETTINEN. "Ultrastructural pathology of cutaneous tumours of northern pike, Esox lucius L." Journal of Fish Diseases 11, nr 1 (styczeń 1988): 47–55. http://dx.doi.org/10.1111/j.1365-2761.1988.tb00522.x.

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WIKLUND, T. "Atypical Aeromonas salmonicida isolated from ulcers of pike, Esox lucius L." Journal of Fish Diseases 13, nr 6 (listopad 1990): 541–44. http://dx.doi.org/10.1111/j.1365-2761.1990.tb00815.x.

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Khomenchuk, V. O., B. Z. Lyavrin i V. Z. Kurant. "МОРФОМЕТРИЧНІ ПОКАЗНИКИ ДЕЯКИХ ВИДІВ РИБ МАЛИХ РІЧОК ЗАХІДНОГО ПОДІЛЛЯ ЯК ІНДИКАТОР ЗАБРУДНЕННЯ ВОДОЙМ". Scientific Issue Ternopil Volodymyr Hnatiuk National Pedagogical University. Series: Biology 78, nr 4 (4.06.2020): 35–40. http://dx.doi.org/10.25128/2078-2357.19.4.6.

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The morphometric characteristics of the most common commercial fish were studied: carp – Cyprinus carpio L., pike – Esox lucius L., crucian carp– Carassius auratus gibelio Bloch. and perch – Perca fluviatilis L., two years old, with an average mass of 290–330 g., 300–350 g., 150–230 g. and 170–230 g. respectively, caught from the small rivers of the Western Podillia (Strypa, Seret, Zolota Lypa). It was found, that the indicators of full length, standard length, head length, head height at the back of the head, the largest and smallest body height in carp, crucian carp and perch decreased linearly in a number of rivers Strypa – Seret – Zolota Lypa. It is noted, that the values of the liver index in the investigated fish species differ significantly from the representatives of the rivers Seret and Zolota Lypa compared to the species from the Strip River. This indicator increases in the Strypa – Seret – Zolota Lypa range, except for the pike index, which is of the lowest importance in the representatives of the Seret River. All the fish species studied saw an increase in the gills index in a number of Strypa – Seret – Zolota Lypa rivers. The study demonstrated that the values of the Fulton and Clark fattening coefficients in carp, crucian carp and perch decreased in a number of Strypa – Seret – Zolota Lypa rivers. In pike the highest values of fattening coefficients were noted for fish from the river Seret. Considering the same age of the fish and relatively the same trophic conditions in the studied rivers, it can be assumed, that the differences in morphometric indices are due to different anthropogenic influence on the watercourses. In this case, the least favorable environmental conditions are in the Zolota Lypa river, which is obviously due to its complex pollution.

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Tański, Adam, Małgorzata Bonisławska, Agnieszka Tórz, Krzysztof Formicki, Arkadiusz Nędzarek, Arkadiusz Drost i Agnieszka Rybczyk. "Specifying the relationship between key stages of pike (Esox lucius L.) embryogenesis and coagulants used in lake recultivation". Limnological Review 13, nr 2 (1.06.2013): 105–13. http://dx.doi.org/10.2478/limre-2013-0012.

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Abstract The study focused on the effect of iron and aluminium coagulants (PIX®113, PAX®18) commonly used for purification of open waters on key stages of embryonic development of pike (Esox lucius L.). Fertilized pike roe was incubated in lake water and in water with the admixture of coagulants, applied in the concentration of 50.0 mg dm-3 at selected stages of embryogenesis: blastopore closure, inoculation, and the hatching of larvae. In the course of the experiment, live embryos were observed and total lengths of the larvae were measured. Simultaneously, selected hydrochemical indicators were gauged. It was discovered that coagulants had the strongest effect at the first stage of embryogenesis (the end of the process of gastrulation). At that stage the survival rate of embryos was the lowest (73.5- 75.0%) and the percentage of deformities in the hatched larvae was the highest (9.7-10.0%).

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Czeczuga, Bazyli, i Ewa Czeczuga-Semeniuk. "Carotenoid content in some body parts of pike (Esox lucius L.) before, during, and post-spawning". Acta Ichthyologica et Piscatoria 30, nr 1 (30.06.2000): 101–15. http://dx.doi.org/10.3750/aip2000.30.1.09.

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Hessl, Amy E., Tom Saladyga, Thomas Schuler, Peter Clark i Joshua Wixom. "Fire history from three species on a central Appalachian ridgetop". Canadian Journal of Forest Research 41, nr 10 (październik 2011): 2031–39. http://dx.doi.org/10.1139/x11-125.

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The impact of settlement era fires on Appalachian forests was substantial, but whether these fires affected the extent of fire-adapted ridgetop plant communities is poorly understood. Here we present fire history and stand structure of an Appalachian ridgetop (Pike Knob, West Virginia) based on fire scars from three species (Pinus pungens Lamb., Pinus resinosa Soland., and Quercus rubra L.) and stand structure from two species (P. pungens and P. resinosa). Our research objectives are to determine (i) the degree to which the fire frequency on Pike Knob was affected by European American settlement (~1780–1900) and (ii) how the history of fire on Pike Knob shaped the current age structure of P. resinosa and P. pungens. All three species documented fire activity beginning in the mid- to late 1800s and continuing into the middle of the 20th century, when pasture lands were most active. The majority of P. pungens and P. resinosa established during or shortly after the ~85-year period of fires (1868–1953), suggesting a strong influence of past land use on current forest composition. Ridgetop pine communities have been resilient to both the absence of fire and frequent fire, indicating that pine communities will also be resilient to modern fire management, whether fire is excluded or re-introduced.

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Treasurer, J. W. "Length and weight changes in perch, Perca fluviatilis L., and pike, Esox lucius L., following freezing". Journal of Fish Biology 37, nr 3 (wrzesień 1990): 499–500. http://dx.doi.org/10.1111/j.1095-8649.1990.tb05881.x.

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Izvekova, G. I., i A. O. Plotnikov. "Hydrolytic activity of symbiotic microflora enzymes in pike (Esox lucius L.) intestines". Inland Water Biology 4, nr 1 (styczeń 2011): 72–77. http://dx.doi.org/10.1134/s1995082911010081.

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Koed, A., K. Balleby, P. Mejlhede i K. Aarestrup. "Annual movement of adult pike (Esox lucius L.) in a lowland river". Ecology of Freshwater Fish 15, nr 2 (czerwiec 2006): 191–99. http://dx.doi.org/10.1111/j.1600-0633.2006.00136.x.

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Lenhardt, M., i P. Cakic. "Seasonal reproductive cycle of pike, Esox lucius L., from the River Danube". Journal of Applied Ichthyology 18, nr 1 (luty 2002): 7–13. http://dx.doi.org/10.1046/j.1439-0426.2002.00285.x.

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Kaushik, S. J., K. Dabrowski i P. Luquet. "Experimental studies on some trophic relationships in juvenile pike, Esox lucius L." Journal of Fish Biology 26, nr 2 (luty 1985): 171–80. http://dx.doi.org/10.1111/j.1095-8649.1985.tb04254.x.

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Giles, N., R. M. Wright i M. E. Nord. "Cannibalism in pike fry, Esox lucius L.: some experiments with fry densities". Journal of Fish Biology 29, nr 1 (lipiec 1986): 107–13. http://dx.doi.org/10.1111/j.1095-8649.1986.tb04930.x.

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Brzuzan, P., M. Luczynski i P. A. Kuzniar. "Mitochondrial DNA variation in two samples of northern pike, Esox lucius L." Aquaculture Research 29, nr 7 (lipiec 1998): 521–26. http://dx.doi.org/10.1111/j.1365-2109.1998.tb01162.x.

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