ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • 1
    Electronic Resource
    Electronic Resource
    Diel rhythm in activity of walleye, Stizostedion vitreum vitreum (1978)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 12 (1978), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Walleye, Stizostedion vitreum vitreum, generally moved along shore, mostly within 100 m, and were relatively inactive during the day. Activity, probably in relation to feeding, increased coincident with changing light intensity during the onset of darkness and daylight. Data were corroborative from ultrasonic tracking, gill net catches and echograms. Ultrasonic telemetry indicated that the majority of swimming speeds, 86%, were below 1 B.L. s−1 and maximum swimming speeds, up to 3.7 B.L. s−1, coincided with periods of maximum catches by gill net shortly after dusk. Walleye were consistently in the essentially homo-thermous epilimnion and did not experience wide variations in ambient temperature. However, since light strongly influences activity, it is likely that light level rather than temperature limits the depth distribution of walleye.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1978.tb04206.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Annual biomass and production of brook charr (Salvelinus fontinalis) introduced into a historically fishless lake (1995)
    Oxford, UK : Blackwell Publishing Ltd
    Ecology of freshwater fish 4 (1995), S. 0 
    Details
    ISSN: 1600-0633
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Brook charr 15 months old were introduced in 1985 into one of two self-contained basins of Batchawana Lake, Ontario, Canada, where they survived and reproduced. Population survival rates (ages ≥ 1) remained high (〉50%) from 1986 to 1992. Annual growth rates peaked (Gx=3.1) the year following their introduction, and remained between 0.8 and 1.6 thereafter. Brook charr biomass (B) was highest, ∼ 55 kg ∼ ha−1 in 1987 and 1990, and production (P) gradually declined from 80–90 in 1986–1987 to ∼ 30 kg-ha−1 -year−1 in 1990–1991. Initial high P:B ratios for brook charr, ∼ 3.0, declined and stabilized to ∼ 1.3 in the third year after introduction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1600-0633.1995.tb00116.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Distribution, growth and transformation timing of larval Geotria australis in New Zealand (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Ecology of freshwater fish 2 (1993), S. 0 
    Details
    ISSN: 1600-0633
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Lamprey, Geotria australis, are widely distributed in New Zealand and are common in streams and rivers of the west coast of both islands, the southern tip of the North Island, the Banks Peninsula and the southern coast of the South Island. In fresh water, lamprey are found in association with all substrate types but are most commonly (〉 50% of the sample sites) found in association with finer gravels. There is insufficient evidence to determine any change in historically abundant adult spawning migrations. Spawning, back calculated from larval growth rates, probably occurs late November-December, and emergence at 9.63 mm occurs in January. We estimate that, on average, ammocoetes grow 0.068 mm/day throughout the year, and metamorphose and emigrate to sea between January-May, 3.5 years after spawning at 101 mm (SD = 6.7).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1600-0633.1993.tb00089.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Substrate selection by Geotria australis ammocoetes in the laboratory (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Ecology of freshwater fish 2 (1993), S. 0 
    Details
    ISSN: 1600-0633
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Lamprey ammocoetes typically emerge from the substrate at night in their search for suitable habitat. When presented with a range in substrate depths, ammocoetes were found in deeper layers (〉2.5 cm, range 1.0–7.7) of substrate and were usually in the deepest substrate. When offered a choice between 0.2 mm and any other coarser substrate, ammocoetes selected the coarser substrates in apparent contradiction with current knowledge. When offered a choice between intermediate (0.6, 0.85 mm) and coarse (1.5, 3.5 mm) substrates, ammocoetes were found in intermediate substrates. Geotria australis ammocoetes grew 0.10 mm day−1 and 0.00038 g day−1 when held in the laboratory and fed adlibitum. Survival was 90% over 154 days. Ammocoetes grew better in the laboratory on a diet of yeast and mixed plankters than in New Zealand streams and apparently selected substrate on the basis of underlying, not surficial, particle size and substrate depth.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1600-0633.1993.tb00091.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Instream size segregation and density of Geotria australis ammocoetes in two New Zealand streams (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Ecology of freshwater fish 2 (1993), S. 0 
    Details
    ISSN: 1600-0633
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Geotria australis occurred almost to the upstream limit of detectable discharge in two New Zealand streams. The length, and consequently age, of larvae differed over the course of the stream and smallest animals - presumed to be age 0 - predominated upstream. Metamorphosing larvae (mean length 99.5 mm) typically occurred in downstream reaches, where flows were higher and substrate was coarser. We estimated that annual larval survival was 47% for age 0 to 1 and 77% for age 1 to 2. Differences in the relation between length and weight occurred both between years within a stream and between streams; thus, we assume growth is generally variable. The density of ammocoetes in New Zealand streams ranged from 0 to 104 m−2 and was significantly related to substrate type and depth in a multiple linear regression model. Because of the predictable nature of lamprey distribution and abundance, we believe it should be possible to estimate the absolute abundance of ammocoetes in a catchment with only a limited assessment of substrate properties.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1600-0633.1993.tb00090.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Influence of a pulp and paper mill effluent on aspects of distribution, survival and feeding of Nipigon Bay, Lake Superior, larval fish (1977)
    Springer
    Bulletin of environmental contamination and toxicology 18 (1977), S. 602-610 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Abstract Surface distribution of Nipigon Bay larval fish was characterized by high abundance, between 500 and 2100 larval fish/10,000 m3 near shore, particularly in proximity to the pulp and paper mill effluent discharge, and low abundance, less than 100/10,000 m3 away from shore. Static bioassay indicated that approximately 60% effluent concentration was intolerable to the natural mixed larval fish community. No wood fibre was found among stomach contents and no difference was apparent in stomach contents of fish caught in influenced and uninfluenced areas. Data therefore suggest that larval fish either were not greatly influenced by plume conditions or were transients.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01684007
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Fossil midge associations and the historical status of fish in acidified lakes (1990)
    Springer
    Journal of paleolimnology 3 (1990), S. 113-127 
    Details
    ISSN: 1573-0417
    Keywords: paleoecology ; Chaoboridae ; Chironomidae ; fish ; acidification
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences
    Notes: Abstract Chaoborid and chironomid (Diptera) fossils were examined in sediment cores form nine Ontario Precambrian Shield lakes that were fishless in 1979. An abundance of Chaoborus americamus (intolerant of predation by fish) throughout cores from four lakes indicated that they were fishless historically. Occurrence of Chaoborus punctipennis and C. flavicans and absence of C. americanus in cores, except near the surface in two cases, indicated that four other lakes were inhabited by fish historically. One of these was probably periodically fishless as suggested by fluctuations among these Chaoborus species. The ninth lake was not suitable for Chaoborus; only one specimen of C. trivittatus was found in this core. Chironomid fossil associations were substantially different in historically fishless and inhabited lakes. Fishless lakes had chironomids typical of eutrophic conditions indicating that seasonal oxygen depletion likely was inimical to fish. Chironomid associations of oligotrophic waters occurred in lakes historically inhabited by fish. Both good water quality and accessibility were required for long-term habitation by fish. Partial recovery of alkalinity and rise in pH were accompanied by substantial re-invasion by fish in two lakes which had been inhabited historically by fish. Diptera associations provide valuable information on the historical suitability of lakes for fish and the presence/absence of fish in regions where acidification of surface waters has occurred.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00414066
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Regional chemical characteristics of lakes in North America: Part I — Eastern Canada (1986)
    Springer
    Water, air & soil pollution 31 (1986), S. 551-567 
    Details
    ISSN: 1573-2932
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Data defining the major ion chemistry of lakes located in eastern Canada have been compiled for the purpose of evaluating the current status of surface water quality in relation to acidic deposition. A companion paper for lakes in the eastern United States (i.e. Part II, Linthurst et al., 1986) has been prepared also. Data sources in Canada included the National Inventory Survey, the Ontario Lake Sensitivity data set, and the National Aquatic Data base which provided an overall data base of approximately 5700 lakes. Only recently collected data (largely 1980 or later) were used in the analysis. Frequency distribution statistics were obtained for pH, acid neutralizing capacity (ANC), SO4 and organic anion (A−) concentrations. Acidic and low ANC waters in eastern Canada occur in a pattern explained by a combination of biogeochemical factors and atmospheric deposition. Nova Scotia contained the highest proportion of acidic and ultralow ANC lakes of any region surveyed in eastern North America; since this region receives approximately 20 kg.ha−1.yr−1 wet SO4 deposition, the proposed target loading may be too high to protect the highly sensitive waters of Maritime Canada. Compared to the rest of eastern Canada, lakes in Ontario have relatively high ANCs due to the influence of CaCO3 contained in the glacial till of the area. Variation in the SO4 concentration of lakes approximately follows expected gradients in wet SO4 deposition. Naturally occurring organic acids do not play a dominating role in the acidification of eastern Canadian lakes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00284212
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Headwater lake chemistry during the spring freshet in North-Central Ontario (1986)
    Springer
    Water, air & soil pollution 29 (1986), S. 245-259 
    Details
    ISSN: 1573-2932
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract From data on 30 headwater lakes in north-central Ontario we found that, during the spring snow melt of 1981, all lakes underwent serious declines in alkalinity. Generally, SO4 2−, alkalinity, Ca+ and Mg2+ concentrations were reduced by runoff and rain then recovered to intermediate levels after the major inputs declined. As expected, a range in responses was evident with lower alkalinity systems showing the greatest changes. The observed changes, however, were consistent with acid loading having depleted alkalinity. In calculating an input-output budget for each lake, we found that changes in Cl−, Na+, and K+ were consistent with atmospheric inputs being the major source as the difference between the expected input and the actual contribution from rain and snow had a mean near zero. There appears to be a significant, ≊ 45%, watershed source of sulphate that we hypothesize is from dry deposition occurring prior to snowfall and is eluted with the melting process. With refinements to a mass balance approach explaining the watershed source of SO4 2− and Al, we feel it is possible to predict springtime lake changes given a few chemical and simple morphometric variables.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00158757
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    facet.materialart.
    Unknown
    Influence of a pulp and paper mill effluent on aspects of distribution, survival and feeding of Nipigon Bay, Lake Superior, larval fish (1977)
    Springer
    Details
    Publication Date: 1977-11-01
    Print ISSN: 0007-4861
    Electronic ISSN: 1432-0800
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Published by Springer
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...