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  • 1
    Electronic Resource
    Electronic Resource
    Animal behaviour Wise fathers (2003)
    [s.l.] : Nature Publishing Group
    Nature 422 (2003), S. 669-670 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Studies of humans suggest that maternal relatives are more likely to comment on a newborn baby's resemblance to its putative father than to its mother. Perhaps these comments provide reassurance about a father's likelihood of being the true father of the child. This interpretation makes ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/422669a
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  • 2
    Electronic Resource
    Electronic Resource
    Mycotoxigenic isolates and toxin production on buckwheat and rice hulls used as bedding materials (1988)
    Springer
    Journal of industrial microbiology and biotechnology 3 (1988), S. 351-356 
    Details
    ISSN: 1476-5535
    Keywords: Mycotoxin ; Aflatoxin ; Trichothecene ; Upholstery ; Rice and buckwheat hulls
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary A pre-evaluation of the samples of both buckwheat and rice hulls, planned for use as pillow fill-materials, showed the presence ofAspergillus flavus, A glaucus, andPenicillium spp. Buckwheat- and rice-hull media (BHM and RHM) inoculated withA. flavus both supported the production of aflatoxins (AFB1 and AFG1) in the parts per million (ppm) range; BHM yielded approximately twice the quantity of both AFB1 and AFG1 than did RHM. Both BHM and RHM inoculated withFusarium tricinctum yielded trichothecenes (T-2 toxins) in the ppm range, with the BHM producing approximately three times more T-2 toxins than the RHM. Also,F. tricinctum grown on both media produced several metabolites which included HT-2, 3′-OH T-2, neosolariol, T-2 triol, and T-2 tetraol. The BHM yielded all of the above, while the RHM failed to support the production of the 3′-OH T-2 toxin. In addition, neither medium inoculated withMyrothecium roridum yielded any detectable levels of macrocyclic trichothecenes. The results indicated that these materials have the potential to become contaminated with mycotoxins.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01569556
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  • 3
    Electronic Resource
    Electronic Resource
    Measuring sexual selection (1995)
    [s.l.] : Nature Publishing Group
    Nature 376 (1995), S. 471-471 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR - Many researchers have measured sexual selection on mating arenas (leks) in a wide variety of species. These studies have influenced our understanding of sexual selection because of the extreme variation in mating success among lekking males. One measure of this variation, used ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/376471a0
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Honesty in sexual selection (1995)
    [s.l.] : Nature Publishing Group
    Nature 375 (1995), S. 280-281 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IN their paper on page 311 of this issue1, Gustafsson and colleagues reveal links between sexual selection and life-history traits. Their study of collared flycatchers (Ficedula albicollis) examined the size of the white patch on the forehead of males (see photograph). This ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/375280a0
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Effects of pollution on reproductive behaviour of fishes (1997)
    Springer
    Reviews in fish biology and fisheries 7 (1997), S. 463-491 
    Details
    ISSN: 1573-5184
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract This review attempts to integrate pollution research with behavioural ecology by focusing on reproductive behaviour of fishes. A search of Aquatic Sciences and Fisheries Abstractsand other sources showed that only 0.1% of 19 199 studies of aquatic pollution and fishes during the past 20 years have made this link. Effects on parental care and courtship have been investigated using a variety of pollutants (e.g. acidification, herbicide, thermal effluent) in several fish families (e.g. Cichlidae, Poeciliidae, Gasterosteidae, Cyprinidae). Eleven of the 19 studies found a change in behaviour from the norm. Effects on courtship included decreases or increases in frequency of displays, increased courtship duration, or performance of male-like behaviour by masculinized females. Studies of parental care have found decreased nest-building activity, decreased offspring defence, or changes in division of parental care between the sexes. Few studies have measured reproductive success or extrapolated their results to effects on populations. We develop a framework for exploring links between pollution and behavioural ecology which suggests potential impacts on life history trade-offs in reproduction, genetic changes in populations, and population sizes. Many reproductive behaviours of fish species are readily quantifiable and behaviours such as courtship by male guppies and other members of the Poeciliidae show some promise for pollution monitoring and behavioural toxicity tests. Choice of such assays would have to compete with the sensitivity and practicality of more traditional methods but may serve as useful complements. There is considerable scope for further research into conservation. A synthesis between behavioural ecology and toxicology should thus provide useful insights for both fields
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018456315671
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  • 6
    Electronic Resource
    Electronic Resource
    Sexual selection and spring arrival times of red-necked and Wilson's phalaropes (1986)
    Springer
    Behavioral ecology and sociobiology 18 (1986), S. 303-310 
    Details
    ISSN: 1432-0762
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Seasonal changes in sex ratios during a 4-year study of red-necked phalaropes and a 3-year study of Wilson's phalaropes showed that females preceded males to breeding and/or courtship areas. The degree to which females preceded males may have been constrained by harsh weather, as the arrival of red-necked phalaropes was synchronous in 1983, when spring was unusually late. Neither sex defended territories; females competed vigorously for direct access to males. These findings show that selection for sexually asynchronous arrival need not act through territoriality. We interpret early female arrival as an adaptation for obtaining mates and coclude that sexual selection may be an important determinant of arrival times in mate defense social systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00300008
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  • 7
    Electronic Resource
    Electronic Resource
    Adaptive host choice and avoidance of superparasitism in the spawning decisions of bitterling (Rhodeus sericeus) (2000)
    Springer
    Behavioral ecology and sociobiology 48 (2000), S. 29-35 
    Details
    ISSN: 1432-0762
    Keywords: Key words Oviposition ; Density dependence ; Freshwater mussel ; Ideal free distribution model
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  Choice of a site for oviposition can have fitness consequences. We investigated the consequences of female oviposition decisions for offspring survival using the bitterling, Rhodeus sericeus, a freshwater fish that spawns inside living unionid mussels. A field survey of nine bitterling populations in the Czech Republic revealed a significantly lower rate of release of juvenile bitterling from Anodonta cygnea compared to three other mussel species. A field experiment demonstrated that female bitterling show highly significant preferences for spawning in A. anatina, Unio pictorum, and U. tumidus. Within a species, female bitterling avoided mussels containing high numbers of bitterling embryos. Mortality rates of bitterling embryos in mussels were strongly density dependent and the strength of density dependence varied significantly among mussel species. Female preferences for mussels matched survival rates of embryos within mussels and females distributed their eggs among mussels such that embryo mortalities conformed to the predictions of an ideal free distribution model. Thus, female oviposition choice is adaptive and minimizes individual embryo mortality.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002650000212
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