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  • 1
    Electronic Resource
    Electronic Resource
    Management by life cycle of wolffish, Anarhichas lupus L., a new species for cold-water aquaculture: a technical paper (1996)
    Oxford, UK : Blackwell Publishing Ltd
    Aquaculture research 27 (1996), S. 0 
    Details
    ISSN: 1365-2109
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Interest in the cultivation of wolffish arose in recent years due to their high-quality meat and fast growth in captivity. In wolffish, an almost juvenile organism, more than 20 mm long, hatches from the egg and can be fed dry pellets just after that. This makes the technology for wolffish breeding much simpler than for other marine fishes, even salmonids. This paper is devoted to common wolffish. Anarhichas lupus L., as the captive breeding of this species has been studied most completely. Experience with broodstock management, insemination, incubation of eggs, start feeding, and growth of rearing juveniles until maturation is described, based mainly on investigations made in Norway and in the Russian Federation. The conditions for obtaining maximum production in the shortest time are assessed. Prospects for using wolffish in aquaculture are briefly discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2109.1996.00810.x
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  • 2
    Electronic Resource
    Electronic Resource
    Growth of juveniles of White Sea common wolffish, Anarhichas lupus L., in captivity (1995)
    Oxford, UK : Blackwell Publishing Ltd
    Aquaculture research 26 (1995), S. 0 
    Details
    ISSN: 1365-2109
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Larvae of the common wolffish. Anarhichas lupus L., hatched from artificially inseminated eggs incubated in the laboratory, were reared on live foods at temperatures ranging from 2 to 10oC. Temperatures over 8oC were too high for newly hatched larvae, but after rearing for 17 days at an average temperature of 6.5oC, the young could tolerate 11oC. The maximum growth rate was observed in the process of keeping of fish during the first 5 months of growing at a temperature gradually increasing up to 14oC. At an age of 577days the average weight of the young in two size groups was 160 and 248 g. A stocking density or five fish 1−1 is satisfactory for young at weight less than 0.2 g. Subsequent growth during 2 months at density of 3-4 fish 1−1 was delayed, compared with that at density of one fish1−1, and all fish reared at high density were infected by Trichodina sp. The growth rate in captivity is compared with that in nature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2109.1995.tb00902.x
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  • 3
    Electronic Resource
    Electronic Resource
    Swelling of wolffish, Anarhichas lupus L., eggs and prevention of their adhesiveness (1996)
    Oxford, UK : Blackwell Publishing Ltd
    Aquaculture research 27 (1996), S. 0 
    Details
    ISSN: 1365-2109
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Wolffish, Anarhichas lupus L. has internal fertilization. The eggs are released into water before the beginning of cleavage and stick together in clutches. To develop methods for separating eggs for subsequent incubation, changes during egg swelling and egg shell hardening were observed. Uninseminated eggs did not swell in ovarian fluid, but a perivitelline space formed in sea water because of a partial cortical reaction. In inseminated eggs kept in ovarian fluid, a cortical reaction took place and swelling was caused by elevation of the yolk membrane. Shrinkage of the yolk and absorption of water were observed after inseminated eggs were placed in sea water. Eggs swelled in ovarian fluid diluted by less than 30% sea water showed abnormal cleavage during subsequent development. An effective method for preventing egg stickiness after fertilization was to distribute them in trays with stagnant sea water for at least 5-6 h. Milk was effective for loss of egg adhesiveness at 50% concentration, but some eggs cleaved abnormally and subsequent mortality was high. The influences of ovarian fluid and milk on initial egg development with respect to peculiarities of egg swelling are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2109.1996.tb01271.x
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  • 4
    Electronic Resource
    Electronic Resource
    Structure and electrical conductivity of polycrystalline silicon films grown by molecularbeam deposition accompanied by low-energy ion bombardment of the growth surface (1997)
    Springer
    Semiconductors 31 (1997), S. 237-240 
    Details
    ISSN: 1063-7826
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract This paper discusses how the structure and electrical conductivity of polycrystalline silicon films grown by molecular-beam deposition are affected by the growth conditions. It shows that the films can be improved by applying to the substrate a voltage in the range 50–300 V, negative with respect to the silicon source. Such films also have higher conductivity. The results are explained in terms of bombardment of the growing film by dopant ions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.1187274
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  • 5
    Electronic Resource
    Electronic Resource
    Erratum: Structure and electrical conductivity of polycrystalline silicon films grown by molecular-beam deposition accompanied by low-energy ion bombardment of the growth surface [Semiconductors 31, 237–240 (March 1997)] (1997)
    Springer
    Semiconductors 31 (1997), S. 1099-1099 
    Details
    ISSN: 1063-7826
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.1187276
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  • 6
    Electronic Resource
    Electronic Resource
    Nonmonotonic character of the growth-temperature dependence of the resistance of polycrystalline silicon films (1998)
    Springer
    Semiconductors 32 (1998), S. 562-564 
    Details
    ISSN: 1063-7826
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract The effect of the substrate temperature T s on the sheet resistance R s for polycrystalline Si films obtained by molecular-beam deposition was investigated. It was found that R s is a nonmonotonic function of T s for films doped with different impurities during the deposition process. An explanation based on a modified Setto model is proposed for the experimental results obtained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.1187438
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  • 7
    Electronic Resource
    Electronic Resource
    Bacterial destruction of the egg shell of common wolffish during incubation (1993)
    Springer
    Aquaculture international 1 (1993), S. 178-186 
    Details
    ISSN: 1573-143X
    Keywords: Wolffish (Anarhichas lupus L.) ; Egg incubation ; Bacterial infection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Mortality of artificially fertilized, laboratory incubated eggs of common wolffish,Anarhichas lupus L., was 100% within 2–3 weeks, at the gastrulation step. The eggs from batches with a high proportion of normally cleavaged eggs died later than the eggs from batches with a low proportion of such eggs. Light micrographs of egg shells showed ulceration of the outer layer and subsequent destruction of the inner layer of zona radiata, caused byFlexibacter sp. The bacterial infection provoked premature hatching at later stages of embryonal development. Treating eggs with glutaraldehyde at a concentration of 600 mg l−1 every third to fifth day during incubation prevented the mortality caused by bacteria.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00692620
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  • 8
    Electronic Resource
    Electronic Resource
    Development of wolffish eggs at different temperature regimes (1995)
    Springer
    Aquaculture international 3 (1995), S. 315-335 
    Details
    ISSN: 1573-143X
    Keywords: Wolffish (Anarhichas lupus L.) ; Eggs ; Incubation ; Hatching ; Larvae ; Temperature
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Embryonic development of common wolffish (Anarhichas lupus L.) was studied at constant temperatures 5.0, 7.0, 9.0, 11.0, 13.0 and 15.0°C. Duration of development from egg activation to several morphological stages including 50% hatching was determined. At 5.0–11.0°C, the survival rate of eggs to hatching ranged from 51 to 88% with a tendency to increase at 5.0 and 7.0°C. Morphological anomalies, bacterial contamination and large mortalities were observed in eggs incubated at 13.0 and 15.0°C. The period of hatching lasted from 10 to 50 d in different egg groups. Embryo length and yolk sac volume at identical morphological stages of development showed only slight relation to temperature. At lower temperatures newly hatched larvae were longer and at more advanced stages of ontogeny. Normal numbers of fin rays in larvae (mean values 74 for dorsal fin and 46 for anal fin) were observed at 5.0 and 7.0°C and in most larvae at 9.0°C. At 11.0 and 13.0°C, many rays were absent, with mean values for dorsal fin 60 and 39 respectively and for anal fin 28 and 4 respectively. The approximate upper limit for normal development of fin rays appeared to be 9.0 °C.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00121621
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  • 9
    Electronic Resource
    Electronic Resource
    Reproductive biology, early ontogeny, and effect of temperature on development in wolffish: comparison with salmon (1994)
    Springer
    Aquaculture international 2 (1994), S. 133-153 
    Details
    ISSN: 1573-143X
    Keywords: Wolffish (Anarhichas lupus L.) ; Atlantic salmon (Salmo salar L.) ; Spawning ; Incubation ; Temperature
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Peculiarities of reproduction, early ontogeny, methods of egg incubation, and influence of temperature on development are compared in wolffish (Anarhichas lupus L.) and in salmonids, mainly Atlantic salmon (Salmo salar L.). Reproductive indices of females are similar in both species, but differ in males due to the small production of sperm in wolffish, a difference explained by internal fertilization in the latter species. The rate of embryonal development until the beginning of differentiation of fin fold at the same temperature is similar in both species, but the period from activation to hatching is more than twice as long in wolffish as in Atlantic salmon. Wolffish hatch at a more advanced stage with a small remnant of yolk sac and begin to feed shortly thereafter. As in Atlantic salmon, eggs and larvae of wolffish have a wide range of temperature resistance except before and after hatching. Based on the difference of life cycles in wolffish and salmon, technologies for their artificial breeding are compared.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00231511
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  • 10
    Electronic Resource
    Electronic Resource
    Transition paths to stochastic oscillations of a self-excited oscillator with a ferrite resonator (1986)
    Springer
    Radiophysics and quantum electronics 29 (1986), S. 602-607 
    Details
    ISSN: 1573-9120
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01034149
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