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  • Artikel: DFG Deutsche Nationallizenzen  (11)
  • 1980-1984  (11)
Datenquelle
  • Artikel: DFG Deutsche Nationallizenzen  (11)
Materialart
Erscheinungszeitraum
Jahr
  • 1
    Digitale Medien
    Digitale Medien
    Investigation of the conversion (dealumination) of ZSM-5 into silicalite by high-resolution solid-state silicon-29 and aluminum-27 MAS NMR spectroscopy (1984)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 88 (1984), S. 3248-3253 
    Details
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/j150659a023
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Efficiency of Electric Fishing for Salmonids in Relation to River Width (1981)
    Oxford, UK : Blackwell Publishing Ltd
    Aquaculture research 12 (1981), S. 0 
    Details
    ISSN: 1365-2109
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: The efficiency of electric fishing for salmonids was found to decrease with increasing river width. The results demonstrated that mean efficiencies in excess of 50% could be obtained using two anodes up to a river width of about 6.5 m and using three anodes up to a river width of about 11 m. Yearling and older fish were captured more efficiently than fry at equivalent river widths and this was discussed in relation to differences in their behaviour.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1365-2109.1981.tb00010.x
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  • 3
    Digitale Medien
    Digitale Medien
    Experiments on the Descent and Feeding of Hatchery-reared Salmon smolts (Salmo salarL.) in the River Bush (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Aquaculture research 15 (1984), S. 0 
    Details
    ISSN: 1365-2109
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Marked hatchery-reared smolts were released into the River Bush on the 1 May and 19 May 1980. and the time for their descent to trapping facilities was monitored. Of the smolts recaptured in each experiment 56.2% and 75.8% respectively descended the 3.5 km to the traps within 48 h, and the overall patterns of their downstream movements were found to be correlated to that of wild smolts. Smolts migrating from control tanks did so more slowly than those released into the river, and were not correlated with the movements of wild smolts.The feeding of recaptured hatchery smolts was compared with that of wild smolts for up to 11 days after the start of each experiment. It was found that most invertebrate groupings were not consumed at significantly different levels in the two groups, and that hatchery-reared fish began feeding on invertebrate food within 9 hours of release.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1365-2109.1984.tb00578.x
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  • 4
    Digitale Medien
    Digitale Medien
    The Effects of a Land Drainage Scheme on the Salmonid Populations of the River Camowen, Co. Tyrone (1983)
    Oxford, UK : Blackwell Publishing Ltd
    Aquaculture research 14 (1983), S. 0 
    Details
    ISSN: 1365-2109
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Annual electro fishing surveys were carried out over an 11-year period at five sites on an upland river, which was subject to dredging operations in connection with a land drainage scheme. Four of the sites were dredged 3 years after the start of the survey and one control site remained undredged throughout. The results indicated that dredging operations initially reduced Salmonid densities and that there was subsequently a progressive downstream recovery, with fry densities taking up to 6 years to improve at the most downstream site. Yearling and older fish recovered to pre-drainage scheme levels more rapidly than fry.Changes in population structure were also observed at three of the dredged sites. Two sites were considerably deepened and finally contained larger numbers of older fish than prior to the drainage scheme. The opposite effect was found to have taken place at a site, which became shallower as a result of drainage works, and contained larger numbers of fry at the end of the survey.Increased fish growth rates were also observed at all sites over the experimental period, and this may have been correlated with enrichment of the river system by leaching from increased fertilizer usage within the catchments.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1365-2109.1983.tb00049.x
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  • 5
    Digitale Medien
    Digitale Medien
    Evaluation of Fluorescent Pigment Marking of Brown Trout (Salmo trutta L.) and Atlantic Salmon (Salmo salar L.) (1982)
    Oxford, UK : Blackwell Publishing Ltd
    Aquaculture research 13 (1982), S. 0 
    Details
    ISSN: 1365-2109
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Fish farm and field trials have been conducted into the longevity and reliability of fluorescent pigment spray marking on brown trout and Atlantic salmon. These have shown that the technique produces high quality marks for a minimum of 20 months for brown trout and 7 months for Atlantic salmon. In addition a minimum size of 6.8 cm for the successful marking of brown trout fry has been established. High mortalities were found when the technique was used on fish which were subject to stress. Causes of stress are discussed and mortality rates of 〈1% have now been achieved.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1365-2109.1982.tb00036.x
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  • 6
    Digitale Medien
    Digitale Medien
    Fluorescent Pigment Marking of Cyprinids (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Aquaculture research 15 (1984), S. 0 
    Details
    ISSN: 1365-2109
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1365-2109.1984.tb00410.x
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  • 7
    Digitale Medien
    Digitale Medien
    Survival of Brown Trout (Salmo trutta L.) Stocked as Summerlings and Autumn Fingerlings in Two Northern Ireland Lakes (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Aquaculture research 15 (1984), S. 0 
    Details
    ISSN: 1365-2109
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: The survival of 0+ brown trout, spray-marked with fluorescent pigment and stocked in two angling lakes as summerlings and autumn fingerlings, was assessed by netting exercises. About twice as many autumn fingerlings as summerlings survived the first winter after stocking, and in one lake the percentage survival of the two groups was estimated at 31.0% and 15.2% respectively. Survival to age 2+ was estimated to be in the range 5.7–9.7% for summerlings, and from 15.1% to 16.6% for autumn fingerlings. The best survival for both groups was obtained in the most productive lake, where condition factors and growth rates were the highest. The results were assessed in economic terms, and the cost per 2+ fish in each lake was more expensive from both summerling and autumn fingerling stocking than from direct introductions of fish-farm, two-year-old trout.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1365-2109.1984.tb00576.x
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  • 8
    Digitale Medien
    Digitale Medien
    Tagging Studies on Various Age Classes of Brown Trout (Salmo trutta L.) (1982)
    Oxford, UK : Blackwell Publishing Ltd
    Aquaculture research 13 (1982), S. 0 
    Details
    ISSN: 1365-2109
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Experiments carried out in hatchery ponds indicated that the survival and tag retention of tagged fish was significantly correlated to their length at tagging. Tag retention in small fish was found to be so low that tagging studies on these in the wild cannot be used to assess angler returns. It was also found that there were significant differences in tagging efficiency between different operators.Experiments were also carried out with tagged trout of four different ages, which were released into an angling lake. The best returns were obtained from spring-stocked 20-year old fish, of which 44.8% were recaptured. This was almost three times the reported recaptures of trout of a similar size which had been stocked as autumn 1+ All the recaptures were corrected for mortality and tag loss from the control results, and compared to the findings of previous studies. The results were also discussed in terms of the value of stocking different age classes of trout in relation to angling pressure and angling methods.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1365-2109.1982.tb00029.x
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  • 9
    Digitale Medien
    Digitale Medien
    Stomach Flushing of Salmonids: A Simple and Effective Technique for the Removal of the Stomach Contents (1981)
    Oxford, UK : Blackwell Publishing Ltd
    Aquaculture research 12 (1981), S. 0 
    Details
    ISSN: 1365-2109
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: A stomach flushing technique is described which has been used for over a year, both in the laboratory and in the field. It is reliable, quick and relatively easy to perform and has been applied to juvenile Atlantic salmon (Salmo salar L.) and brown trout (S. trutta L.). The only limitation on its use was that fish 〈4 cm in length were considered too small to flush. Experiments carried out show that the technique removes 98.9% of the stomach contents from the fish and has very little effect on subsequent survival (99.3%) and condition. It is suggested that this technique is an improvement on previous designs.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1365-2109.1981.tb00002.x
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  • 10
    Digitale Medien
    Digitale Medien
    Population changes after two years of salmon (Salmo salar L.) stocking in upland trout (Salmo tmtta L.) streams (1980)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 17 (1980), S. 0 
    Details
    ISSN: 1095-8649
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie
    Notizen: The survival of salmon stocked in upland trout streams in the presence of salmon parr was found to be only about half the value recorded when trout alone made up the resident stock. Changes in the trout population were also recorded following the two years of salmon stocking, and these suggested that the presence of salmon parr may also influence trout fry survival. The findings are discussed in the context of habitat competition and total stream holding capacity.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1095-8649.1980.tb02789.x
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