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  • 1
    Electronic Resource
    Electronic Resource
    Population studies on benthic nematodes within a subtropical seagrass community (1967)
    Springer
    Marine biology 1 (1967), S. 85-96 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Examination of the benthic nematode fauna of the soft surface sediments of a turtle grass (Thalassia testudinum König) bed in Biscayne Bay (Miami, Florida) has revealed a high degree of homogeneity exemplified by the dominance of four species out of approximately 100 nematode taxa from the area. The dominant species, Metoncholaimus scissus, Theristus fistulatus, Spirinia parasitifera and Gomphionema typica, regularly comprised between 87 and 95% of the total number of nematodes present in samples collected during the winter and spring of 1966. T. fistulatus showed an abundance of 56% over the course of the study, i.e., 160 samples collected over a period of 14 months. Maximal peaks in population densities were noted and correlated with physiographic alterations in the environment. The M. scissus population declined concurrent with changes in the community; at the same time, with accumulation of sediment, the Terschellingia longicaudata population increased. Ratios of species, and especially shifts in the dominantforms present, with repeated collections, are extremely useful indicators of important biological and physical changes in a particular environment. Analysis of distributional data on dominant species in 64 samples from eight closely approximated positions showed that observed temporal and spatial variations were not significant statistically at the 5% level. It is concluded that erroneous observations can be made from ecological studies based on field data derived without proper replication or consideration of seasonal factors. The latter as well as intrinsic variability within the particular locality itself contribute to the basic faunistic composition of benthic communities.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00386510
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  • 2
    Electronic Resource
    Electronic Resource
    Yeasts from the North Sea (1967)
    Springer
    Marine biology 1 (1967), S. 118-123 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Yeasts were isolated from twelve established sites in the North Sea from 1964 to 1966. A percentage frequency of 99% with populations varying from 〈10 to 〉3000 viable cells/L was observed. This mycota was characterized by considerable spatial and temporal fluctuation, with the dominant yeast present being the ascosporogenous species, Debaryomyces hansenii. This taxon, as well as other common North Sea yeasts, e.g., Rhodotorula rubra and Candida diddensii, have been reported frequently from other marine locales. Noteworthy concentrations of yeasts, especially D. hansenii, were observed during summer months, often in association with various stages of development of the dinoflagellate, Noctiluca miliaris. The population dynamics of the North Sea yeasts are discussed in relation to similar studies of other marine environments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00386516
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Cellulose degradation by Lulworthia floridana and other lignicolous marine fungi (1968)
    Springer
    Marine biology 2 (1968), S. 41-46 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Gravimetric analyses of cellulose (Solka Floc) utilization by representative marine Ascomycetes, including Lulworthia floridana, Lindra sp., Torpedospora sp. and Halosphaeria mediosetigera, have shown noteworthy activity based on loss of weight of cellulose by the various fungi. Particularly striking activity is evidenced by L. floridana and Torpedospora sp., with 〉50% cellulose degradation after 3 weeks of fungal growth. Comparable studies with the deuteromycete, Dendryphiella salina, showed 〉50% loss within 6 days. Dissimilar responses by various L. floridana isolates are noted. Intensive degradative activity at pH's of 6 to 8 is common along with negligible amounts of cellulase (Cx units). Adsorption of the enzyme to the mycelia or to the cellulose particles in the medium is suggested. Earlier laboratory analyses of fungal degradation of Manila cordage compare favorably with present gravimetric studies and support field observations on the significance of fungal infestation of wood, particularly that incited by the Lulworthia floridana group.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00351636
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  • 4
    Electronic Resource
    Electronic Resource
    Ecological investigations of the marine nematode Metoncholaimus scissus (1970)
    Springer
    Marine biology 6 (1970), S. 43-47 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Significant concentrations of the large oncholaimid Metoncholaimus scissus Wieser and Hopper (1967) (〉7000 animals/24 cm2 area or 2.68x106 specimens/m2) have been noted in soft-bottom turtle grass communities. Activities of the nematode frequently show an indirect relationship to blooms of the benthic diatom Pleurosigma balticum. Analysis of biomass data for M. scissus (as much as 28 g wet weight/m2) demonstrate the importance of microsite activity and sensitivity of the species to small significant changes in the benthic environment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00352606
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  • 5
    Electronic Resource
    Electronic Resource
    Ecology and characterization of yeasts from aquatic regions of South Florida (1968)
    Springer
    Marine biology 1 (1968), S. 291-308 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Mycological investigations, entailing over 400 samples from 120 separate collection stations, of the composite aquatic regions of southern Florida and adjacent areas have been developed. A collection of over 1000 yeasts, representing more than 50 taxa, has been characterized and studied. Highest yeast densities were found in freshwaters with the recovery of yeasts per sample decreasing from 100% to approximately 70% with lowered organic content, increasing salinity and remoteness from land. Average cell population densities, variety of species, and particularly the number of sexual yeasts, decreased in saline samples. The isolation media used were evaluated and have been discussed in terms of yeast densities obtained. Stritly oxidative species of Candida, Cryptococcus, and Rhodotorula and the sexual yeast, Debaryomyces hansenii, were the most widespread in all the habitas studied and the predominant forms in water of relatively low organic content. Selective survival of certain yeasts in the various aquatic environments was suggested. Definite distributional patterns were exhibited by various taxa and the possible existence of “indicator” species wa suggested. The systematics of the fungi have been reviewed at length and the significance of strain differences considered and discussed as related to the unique characteristics of the various ecological habitats.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00360780
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  • 6
    Electronic Resource
    Electronic Resource
    Observations on the Bionomics of the Marine Nematode, Metoncholaimus SP. (1966)
    [s.l.] : Nature Publishing Group
    Nature 209 (1966), S. 899-900 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] COMPARATIVELY scant information exists on the bionomics of nematodes in the marine environment. In conjunction with our biological investigations of sea-grass communities (turtle grass, Thalassia testudinumf Knig) in Biscayne Bay (Miami), Florida1, an undescribed species2 of the genus ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/209899a0
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  • 7
    Electronic Resource
    Electronic Resource
    Color Stability of Astaxanthin Pigmented Rainbow Trout Under Various Packaging Conditions (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 49 (1984), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Astaxanthin-rich oil extract from Louisiana crawfish by-product imparted a salmon-red coloration to the flesh and integument of rainbow trout on a diet containing 45 mg astaxanthin/kg feed. Carotenoids deposited in fish flesh were stable (ca 90% retention) in air-packed samples at 1 - 2°C. Oxygen-evacuated and CO2-enriched packaging gave adverse color stability. Lowest pigment levels were in frozen samples, with 53% of the absorbed pigment degraded in 14 days. Visual color scores were consistent with quantitative pigment analyses (r = 0.77). Higher pigment contents were observed in air-packed (1 - 2°C) samples, possibly due to astacene or other breakdown products of astaxanthin. Maximal TBA values were observed in air-packed (1 - 2°C) samples. The effect of tissue enzyme homogenate on fading of trout flesh is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1984.tb14985.x
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  • 8
    Electronic Resource
    Electronic Resource
    Pichia spartinae sp. n. from Louisiana marshland habitats (1970)
    Springer
    Antonie van Leeuwenhoek 36 (1970), S. 503-508 
    Details
    ISSN: 1572-9699
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A new species ofPichia has been described.Pichia spartinae was one of the predominant yeasts isolated from the rhizosphere and tissue of oyster grass,Spartina alterniflora, in the Louisiana marshland. The species occurs in the environment in both the homo- and heterothallic state. This is the first species ofPichia in high densities in an estuarine locality.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02069052
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  • 9
    Electronic Resource
    Electronic Resource
    Growth and multiplication ofRhodotorula glutinis as determined by viable and total cell counts (1963)
    Springer
    Antonie van Leeuwenhoek 29 (1963), S. 203-210 
    Details
    ISSN: 1572-9699
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Excellent correlation has been shown between two total and two culture, or viable, count techniques used for cell enumeration studies ofRhodotorula glutinis. The culture methods examined, the “drop plate” and the spread plate proved equally reliable for enumeration except for slight variations during the period of maximal budding of the organism. The Coulter Counter was a valuable tool as it permitted rapid cell population analysis with minimal preparatory procedures. The Petroff-Hausser counting chamber was found applicable only when cell numbers approached 109 or greater.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02046054
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