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  • 1
    Electronic Resource
    Electronic Resource
    SHORT-TERM EFFECTS OF BOAT TRAFFIC ON BOTTLENOSE DOLPHINS, TURSIOPS TRUNCATUS, IN SARASOTA BAY, FLORIDA (2001)
    Oxford, UK : Blackwell Publishing Ltd
    Marine mammal science 17 (2001), S. 0 
    Details
    ISSN: 1748-7692
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Coastal cetaceans are subject to potential injury or disturbance from vessels. In Sarasota, Florida, where about 120 resident bottlenose dolphins, Tursiops truncatus, share the inshore waters with over 34,000 registered boats, disturbance potential is high. We assessed specific behavioral responses of individual dolphins to boat traffic. We conducted focal animal behavioral observations during opportunistic and experimental boat approaches involving 33 well-known identifiable individual bottlenose dolphins. Dolphins had longer interbreath intervals (IBI) during boat approaches compared to control periods (no boats within 100 m). Treatment IBI length was inversely correlated with distance to the nearest boat in opportunistic observations. During 58 experimental approaches to 18 individuals, a video system suspended from a tethered airship was used to observe subsurface responses of focal dolphins as boats under our control, operating at specified speeds, were directed near dolphins. Dolphins decreased interanimal distance, changed heading, and increased swimming speed significantly more often in response to an approaching vessel than during control periods. Probability of change for both interanimal distance and heading increased when dolphins were approached while in shallow water. Our findings provide additional support for the need to consider disturbance in management plans for cetacean conservation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1748-7692.2001.tb01292.x
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  • 2
    Electronic Resource
    Electronic Resource
    Measuring Biological Diversity (1993)
    s.l. : American Chemical Society
    Environmental science & technology 27 (1993), S. 25-26 
    Details
    ISSN: 1520-5851
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/es00038a601
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  • 3
    Electronic Resource
    Electronic Resource
    Inferring extinction in a declining population (1993)
    Springer
    Journal of mathematical biology 32 (1993), S. 79-82 
    Details
    ISSN: 1432-1416
    Keywords: Sighting data ; Non-stationary Poisson process ; Black-footed ferret
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Mathematics
    Notes: Abstract This note describes a test for extinction in a declining population based on a record of sightings. The test assumes that, prior to extinction, the sightings follow a Poisson process with decreasing rate function. An application to a sighting record of the black-footed ferret is presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00160376
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  • 4
    Electronic Resource
    Electronic Resource
    Response (1991)
    Springer
    Oecologia 86 (1991), S. 146-146 
    Details
    ISSN: 1432-1939
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00317403
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  • 5
    Electronic Resource
    Electronic Resource
    Testing for density dependence (1990)
    Springer
    Oecologia 83 (1990), S. 47-49 
    Details
    ISSN: 1432-1939
    Keywords: Density dependence ; Random walk ; Autoregressive process
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The robustness and sensitivity of a test for density dependence in an animal population against departures from the assumed null and alternative model is assessed via simulation. The test is shown to be nonrobust and insensitive to departures from the assumed models.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00324632
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  • 6
    Electronic Resource
    Electronic Resource
    Acoustic alarms reduce porpoise mortality (1997)
    [s.l.] : Macmillan Magazines Ltd.
    Nature 388 (1997), S. 525-525 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The most serious danger to dolphins and porpoises around the world is the threat from various forms of gill-net fishing. One potential way to reduce the number of deaths of marine mammals is the use of active acoustic alarms to warn animals about the presence of nets. Until now, acoustic ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/388525a0
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  • 7
    Electronic Resource
    Electronic Resource
    Flightless birds When did the dodo become extinct? (2003)
    [s.l.] : Nature Publishing Group
    Nature 426 (2003), S. 245-245 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The extinction of the dodo (Raphus cucullatus L.; Fig. 1) is commonly dated to the last confirmed sighting in 1662, reported by Volkert Evertsz on an islet off Mauritius. By this time, the dodo had become extremely rare — the previous sighting having been 24 years earlier — ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/426245a
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  • 8
    Electronic Resource
    Electronic Resource
    Identifying regional seismic relationships by cross-correlation (1995)
    Springer
    Pure and applied geophysics 144 (1995), S. 301-306 
    Details
    ISSN: 1420-9136
    Keywords: Cross-correlogram ; hypothesis test ; serial independence
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The identification of relationships between seismicity in different regions is commonly based on establishing the statistical significance of the largest absolute value in the cross-correlogram between time series of seismicity. The assessment of significance typically ignores the selection of the largest absolute value in the cross-correlogram and consequently exaggerates significance. In this note, a simple method for correcting the significance level for selection is presented. The method is valid as long as the two series are each serially independent. An example concerning seismicity in Mexico and Kamchatka is presented. In this case, correcting for selection has a dramatic effect.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00878636
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  • 9
    Electronic Resource
    Electronic Resource
    On Testing for Change in Extreme Events (1999)
    Springer
    Climatic change 42 (1999), S. 341-349 
    Details
    ISSN: 1573-1480
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract A common problem in climatology is detecting a change in the frequency or magnitude of extreme events in an historical time series. This paper compares the performance of two general approaches to this problem in a simple situation. The first approach is based on modelling the entire distribution, while the second approach focuses on the tail of the distribution. Although the second approach has clear advantages, the results of this paper suggest that it can also involve a substantial loss of information.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1005441005005
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  • 10
    Electronic Resource
    Electronic Resource
    On the detection of greenhouse warming (1989)
    Springer
    Climatic change 15 (1989), S. 449-453 
    Details
    ISSN: 1573-1480
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Two facts that have been cited as evidence of the onset of greenhouse warming are the extent to which the most recent value in a global temperature series is unusually warm and the observation that the four warmest years on record occurred in the 1980's. We examine these results in more detail, and we address the question as to whether these facts constitute evidence in favor of the detection of greenhouse warming. We conclude that they do not support detection unless we are prepared to attribute all warming in the data to the greenhouse effect.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00240467
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