ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Mayfly locomotory responses to endoparasitic infection and predator presence: the effects on predator encounter rate (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Freshwater biology 23 (1990), S. 0 
    Details
    ISSN: 1365-2427
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: SUMMARY. 1. The effects of predaceous stoneflies and endoparasilism by mermithid nematodes on the locomotory behaviour of individual mayflies were studied in the laboratory. The effects of predator- and parasite-induced changes in activity on predator encounter, attack and capture rates were also examined.2. In response to predator presence non-parasitized mayflies decreased activity, while parasitized mayflies increased activity, in comparison to a control group. As a result, the faster-moving parasitized individuals encountered stonefly predators much more frequently. The frequency of attacks per encounter did not change.3. In view of this and other studies, two predator-avoidance strategies based on mayfly locomotory and defensive capabilities are proposed: (a) Mayflies that are able effectively to flee a predator's attack and those able to employ a behavioural defence may decrease their mean velocity when a predator is detected, thereby reducing the likelihood of an encounter while allowing foraging to continue; (b) Slower-moving or otherwise defenceless mayflies may immediately move away from the area in which a predator is perceived in order to avoid an encounter.4. In the absence of a predator, parasitized mayflies demonstrated greatly increased activity. This probably reflects increased foraging in response to the nutritional deficit imposed by the endoparasite. A decrease in upstream movement by parasitized mayflies may also indicate a parasite-imposed energy stress.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2427.1990.tb00278.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Past glories (1983)
    [s.l.] : Nature Publishing Group
    Nature 306 (1983), S. 515-515 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fossils: the Key to the Past. By Richard Fortey British Museum (Natural History): 1983. Pp.172. Pbk £6.50 (£5.95 at the Museum). Collins Guide to Dinosaurs. Published By David Lambert Collins/Avon: 1983. Pp.256. £6.95, $8.95. MANY fine popular books about palaeontology ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/306515b0
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Conodonts classified at last (1987)
    [s.l.] : Nature Publishing Group
    Nature 325 (1987), S. 482-483 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] CONODONTS, small tooth-like fossils found in Palaeozoic (570-245 million-year-old) rocks, were until recently a mystery. Many supposed conodont animals have been reported, but it was not until 1983 that an acceptable specimen was described1. New findings2 improve our knowledge of this conodont ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/325482a0
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Palaentology: Small companions for early dinosaurs (1984)
    [s.l.] : Nature Publishing Group
    Nature 307 (1984), S. 111-112 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] FOSSILIZED cave systems around Bristol, England, have yielded an important fauna of small reptiles dating from the times of the early dinosaurs, about 200 million years ago. Until recently, these were thought to be specialized upland faunas because the animals were rather different from those of ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/307111b0
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Uncertain turtle relationships (1997)
    [s.l.] : Nature Publishing Group
    Nature 387 (1997), S. 466-466 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Turtles have generally been regarded as basal reptiles because they apparently retain the primitive anapsid skull pattern (no temporal fenestrae) unlike other extant reptiles which are diapsid (two temporal fenestrae on each side). However, the phylogenetic relationships between turtles and other ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/387466a0
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Robust dinosaur phylogeny? (1998)
    [s.l.] : Macmillan Magazines Ltd.
    Nature 396 (1998), S. 423-424 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The Ankylosauria comprises two families of armoured dinosaurs (Nodosauridae and Ankylosauridae) that are best known from well-preserved specimens from the Cretaceous period. In their report on the skull of a new Jurassic ankylosaur, Gargoyleosaurus, Carpenter et al. presented a phylogenetic ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/24763
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Self-similarity of extinction statistics in the fossil record (1997)
    [s.l.] : Macmillan Magazines Ltd.
    Nature 388 (1997), S. 764-767 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The dynamical processes underlying evolution over geological timescales remain unclear,. Analyses of time series of the fossil record have highlighted the possible signature of periodicity in mass extinctions,, perhaps owing to external influences such as meteorite impacts. More recently the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/388764a0
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Phylogeny of the major tetrapod groups: Morphological data and divergence dates (1990)
    Springer
    Journal of molecular evolution 30 (1990), S. 409-424 
    Details
    ISSN: 1432-1432
    Keywords: Phylogeny ; Tetrapods ; Morphology ; Cladistics ; Divergence ; Evolution ; Amphibians ; Reptiles ; Birds ; Mammals
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The phylogeny of the major groups of tetrapods (amphibians, reptiles, birds, and mammals) has until recently been poorly understood. Cladistic analyses of morphological data are producing new hypotheses concerning the relationships of the major groups, with a focus on the identification of monophyletic groups. Molecular phylogenies support some of these views and dispute others. Geological dates of the major evolutionary branching points are recalculated on the basis of the cladograms and new fossil finds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02101113
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Vetibrate palaeontology: First marsupial fossil from Asia (1985)
    [s.l.] : Nature Publishing Group
    Nature 318 (1985), S. 313-313 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] MARSUPIALS, pouched mammals like kangaroos and opossums, are today restricted to Australia and the Americas (Fig. 1). How this split distribution came about has been much debated by biogeographers. A northern dispersal route was favoured at first, with the early marsupials travelling from the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/318313a0
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Macroevolution: The Red Queen put to the test (1985)
    [s.l.] : Nature Publishing Group
    Nature 313 (1985), S. 734-735 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] VAN Valen's Red Queen hypothesis 1 has attracted a great deal of interest since it was first proposed, and it has also been the subject of some controversy. Hitherto, discussions of the validity of the Red Queen have often been rather inconclusive because of the lack of an adequate test of the hypo ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/313734b0
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...