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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Insectes sociaux 26 (1979), S. 240-246 
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Resume Deux types de nid deMacrotermes bellicosus provenant de Mokwa, Nigeria, sont décrits. Tous deux ont été trouvés dans les mêmes conditions de sol, de climat et d'écoulement d'eau, sans qu'aucun mode de distribution ne les distingue l'un de l'autre. L'un des deux nids, le nid à disque en spirale, est muni d'un socle discoïdal très développé, dont le dessous porte, suspendues, des languettes disposées en spirale.
    Notes: Summary Two types ofMacrotermes bellicosus nests from Mokwa, Nigeria, are described. Both were found under similar conditions of soil, climate and drainage with no clear pattern of distribution to distinguish them. One of these, the spiral plate nest, has a highly developed base-plate which bears spirally arranged hanging vanes.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The seasonal variations in distribution and abundance of the common zooplankton species in the Bristol Channel and Severn Estuary were related to the salinity regimes observed over the period November 1973 to February 1975. The dominant constituents in all regions were the calanoid copepods, which reached maximum densities in July: approximately 100 times their winter levels. Four zooplankton assemblages were recognised using an objective classification program which computed similarity coefficients and used group-average sorting. The assemblages existed along the salinity gradient observed from the Severn Estuary to the Celtic Sea. The assemblages were classified as true estuarine, estuarine and marine, euryhaline marine and stenohaline marine and were characterized by the copepods Eurytemora affinis (Poppe) (〈30‰S), Acartia bifilosa var. inermis (rose) (27 to 33.5‰S), Centropages hamatus (Lilljeborg) (31 to 35‰S) and Calanus helgolandicus (Claus) (〉33‰S), respectively.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Mysids are important components of the zooplankton biomass of estuaries and coastal regions. Twelve species were identified from the Bristol Channel and Severn Estuary (British Isles). The most abundant species wasSchistomysis spiritus (Norman), the majority of which occurred in the Channel within a salinity range of 27 to 34‰ S. The seasonal distribution and numerical abundance of this species are described over the period November 1973 to February 1975. The peak of abundance ofS. spiritus occurred in the Inner Channel in September (mean of 14 individuals m-3, ca. 250 individuals m-2 for this sub-region) when it represented 76% of the omnivore biomass (μg C m-3); for the 364 d from 4 November 1973, the species contributed 43% of the total integrated omnivore standing stock. This peak of biomass was the product of the development of the juveniles from the reproductive period in the spring. Correlation analyses were carried out betweenS. spiritus biomass and 10 physical and biotic variables for 2 mo, November 1973 and September 1974. Temperature and salinity, which are simple indices of seasonal change, exhibited significant correlations with the mysid's abundance in both months. These correlations do not necessarily imply causal relationships or mechanisms between the distribution and abundance of the species and these variables. Clearly, in such a complex environment as an estuarine ecosystem a single variable is unlikely to control the abundance of a species, it is more the result of the combined influence of a number of variables acting in concert.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food biochemistry 6 (1982), S. 0 
    ISSN: 1745-4514
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: A preliminary investigation of the membrane lipid of Halobacterium halobium as a food additive. F. J. Post and N. F. Collins, Biology Department, Utah State University, Logan, Utah 84322. A study was made of the suitability of the diether phytanyl phosphatidyl glycerol phosphate lipid component of the cell membrane of Halobacterium halobium NRC 34003 as a potential food additive. The lipid was shown to be a possible emulsifier with a hydrophile-lipophile balance (HLB) of 7–8 producing a water in oil emulsion. Its use as a possible noncaloric fat substitute is also discussed. The lipid had a melting point at -120 to -150 C and was nontoxic at an 0.8 g kg-1, one-dose exposure to mice either by feeding or by intraperitoneal injection. Some methods for increasing the yield of lipid are proposed.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Journal of Rural Studies 6 (1990), S. 163-173 
    ISSN: 0743-0167
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Geography , Economics
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Kyklos 16 (1963), S. 0 
    ISSN: 1467-6435
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Sociology , Economics
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 57 (2000), S. 0 
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Growth (length, weight) of yellow perch Perca flavescens in western and west-central Lake Erie began between June and July, possibly reaching asymptotic size by early winter. Energy density (kJ g−1) of somatic tissue increased markedly from June to September, then declined to low levels by the following spring. Consequently, energy mass (kJ) of somatic tissue increased to September and then declined slowly until March. Ovarian growth began in October, and the size of the ovaries was maximal in April, just before spawning in May. The energy density of ovaries, however, increased to a peak in December, and then declined. The increase in ovary size in the winter, therefore, resulted largely from an allocation of tissue of low energy density. Fecundity and gonad size were correlated with somatic and gonadal energy density. A bioenergetics model was used to describe the monthly allocations of energy to respiration, growth, excretion, and reproduction. Most direct reproductive costs (80%) were incurred from September to December, corresponding to the cycle in the activity of the liver. Energy acquired in the early summer may be critical for determining maturation, fecundity, and egg quality. From 1978 to 1990, 〈80% of the females from the western and west-central basins of Lake Erie were classed as spent in July.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Political studies 29 (1981), S. 0 
    ISSN: 1467-9248
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Political Science
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Electoral Studies 3 (1984), S. 290-293 
    ISSN: 0261-3794
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Political Science , Sociology
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Electoral Studies 8 (1989), S. 281-287 
    ISSN: 0261-3794
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Political Science , Sociology
    Type of Medium: Electronic Resource
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