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  • 1
    Electronic Resource
    Electronic Resource
    Assemblages of fish on patch reefs — predictable or unpredictable? (1980)
    Springer
    Environmental biology of fishes 5 (1980), S. 243-249 
    Details
    ISSN: 1573-5133
    Keywords: Community structure ; Competition ; Coral reef fish ; Recruitment ; Stability ; Resilience ; Constancy ; Diversity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Synopsis The structure of assemblages of fish on small patch reefs was experimentally investigated by totally denuding three experimental reefs, and following their ‘recovery’ and concomitant changes in three control reefs by subsequent visual censusing. Experimental treatment had no significant effect on the number of fish or species subsequently present, nor on the faunal composition of the assemblages. However, all assemblages, both control and experimental, exhibited significant change in structure through the 28 month period they were followed. Such assemblages thus appear to have low constancy, or stability, but high resilience. The results conform to those of previous small-scale, or artificial reef studies, and are compatible with a view emphasising the role of variability in recruitment in determining the structure of reef fish assemblages.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00005358
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Precision and accuracy of visual census technique for fish assemblages on coral patch reefs (1981)
    Springer
    Environmental biology of fishes 6 (1981), S. 333-339 
    Details
    ISSN: 1573-5133
    Keywords: Coral reef fishes ; Community structure ; Sampling technique ; Underwater observation ; Faunal count
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Synopsis A visual census technique is described in which the results of three separate enumerations of fish at a site are combined to produce a ‘best estimate’ of the fish fauna present. Its precision and accuracy are examined, and compared to those of censuses obtained by modifications of the technique. Visual censuses can display high repeatability, but they seldom (if ever) completely sample the fish present at a site. Accuracy varies with technique used. In our tests, the preferred method yielded 82% of species and 75% of individuals known to be present and potentially censurable at the time the observations were made. Visual censuses are of comparable accuracy to ichthyocide collections of unenclosed sites, but the two methods sample different components of the total fish fauna. It is important when using visual censuses to remember that their accuracy is not 100%.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00005761
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Coexistence of coral reef fishes — a lottery for living space (1978)
    Springer
    Environmental biology of fishes 3 (1978), S. 85-102 
    Details
    ISSN: 1573-5133
    Keywords: Competition ; Pelagic ; Recruitment ; Reef fish community ; Reproductive strategy ; Territorial ; Tropical diversity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Synopsis Data are summarised from studies of two reef fish communities — pomacentrids territorial on rubble patches, and fishes resident in small isolated colonies of coral. In each case there is evidence that availability of living sites limits numbers of fishes, and that similar species of fish use the same kinds of spaces. Priority of arrival as recruits, rather than subtle differences in requirements or competitive abilities of adults, appears to determine which species holds each site. Faced with a limited and patchy supply of living space, most reef fishes are sedentary as adults, and produce frequent clutches of pelagic larvae over extended breeding seasons In this way they maximise their chances of getting offspring into suitable living sites as such sites appear. It is argued that by adopting this strategy, reef fishes are preadapted for forming inter-specific lotteries for living space if several species with similar requirements occur together. Such lotteries among similar species may be a feature common to many reef fish communities, and may explain the typically high within-site diversity found in them.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00006310
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    Paper (German National Licenses)
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