Search Results - (Author, Cooperation:D. Gwynne)
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1P. Abbot ; J. Abe ; J. Alcock ; S. Alizon ; J. A. Alpedrinha ; M. Andersson ; J. B. Andre ; M. van Baalen ; F. Balloux ; S. Balshine ; N. Barton ; L. W. Beukeboom ; J. M. Biernaskie ; T. Bilde ; G. Borgia ; M. Breed ; S. Brown ; R. Bshary ; A. Buckling ; N. T. Burley ; M. N. Burton-Chellew ; M. A. Cant ; M. Chapuisat ; E. L. Charnov ; T. Clutton-Brock ; A. Cockburn ; B. J. Cole ; N. Colegrave ; L. Cosmides ; I. D. Couzin ; J. A. Coyne ; S. Creel ; B. Crespi ; R. L. Curry ; S. R. Dall ; T. Day ; J. L. Dickinson ; L. A. Dugatkin ; C. El Mouden ; S. T. Emlen ; J. Evans ; R. Ferriere ; J. Field ; S. Foitzik ; K. Foster ; W. A. Foster ; C. W. Fox ; J. Gadau ; S. Gandon ; A. Gardner ; M. G. Gardner ; T. Getty ; M. A. Goodisman ; A. Grafen ; R. Grosberg ; C. M. Grozinger ; P. H. Gouyon ; D. Gwynne ; P. H. Harvey ; B. J. Hatchwell ; J. Heinze ; H. Helantera ; K. R. Helms ; K. Hill ; N. Jiricny ; R. A. Johnstone ; A. Kacelnik ; E. T. Kiers ; H. Kokko ; J. Komdeur ; J. Korb ; D. Kronauer ; R. Kummerli ; L. Lehmann ; T. A. Linksvayer ; S. Lion ; B. Lyon ; J. A. Marshall ; R. McElreath ; Y. Michalakis ; R. E. Michod ; D. Mock ; T. Monnin ; R. Montgomerie ; A. J. Moore ; U. G. Mueller ; R. Noe ; S. Okasha ; P. Pamilo ; G. A. Parker ; J. S. Pedersen ; I. Pen ; D. Pfennig ; D. C. Queller ; D. J. Rankin ; S. E. Reece ; H. K. Reeve ; M. Reuter ; G. Roberts ; S. K. Robson ; D. Roze ; F. Rousset ; O. Rueppell ; J. L. Sachs ; L. Santorelli ; P. Schmid-Hempel ; M. P. Schwarz ; T. Scott-Phillips ; J. Shellmann-Sherman ; P. W. Sherman ; D. M. Shuker ; J. Smith ; J. C. Spagna ; B. Strassmann ; A. V. Suarez ; L. Sundstrom ; M. Taborsky ; P. Taylor ; G. Thompson ; J. Tooby ; N. D. Tsutsui ; K. Tsuji ; S. Turillazzi ; F. Ubeda ; E. L. Vargo ; B. Voelkl ; T. Wenseleers ; S. A. West ; M. J. West-Eberhard ; D. F. Westneat ; D. C. Wiernasz ; G. Wild ; R. Wrangham ; A. J. Young ; D. W. Zeh ; J. A. Zeh ; A. Zink
Nature Publishing Group (NPG)
Published 2011Staff ViewPublication Date: 2011-03-25Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsKeywords: *Altruism ; Animals ; *Biological Evolution ; Cooperative Behavior ; Female ; Game Theory ; *Genetic Fitness ; Genetics, Population ; Heredity ; Humans ; Male ; *Models, Biological ; Phenotype ; Reproducibility of Results ; *Selection, Genetic ; Sex RatioPublished by: -
2Staff View
ISSN: 1365-2494Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, NutritionNotes: The response of marsh birdsfoot trefoil (Lotus uliginosus) to inoculation with appropriate Rhizobium spp. was compared over 2 years. Inoculated and uninoculated seed was sown at 5 kg ha-1 on three soil types, brown earth, peaty podsol and deep peat. Perennial ryegrass cv. Perma was sown at 20 kg ha-1 as a companion species. Plots received either no N or a light starter dressing of 30 kg ha-1 N. Significant benefits from inoculation were recorded for Lotus germination and nodulation, Lotus and non-Lotus herbage DM harvested and Lotus cover on the deep peat, and to a lesser extent on the other soil-types. Due to particularly uneven early establishment, work on the peaty-podsol site was discontinued at an early stage. There was a trend towards depression of Lotus where N had been applied to inoculated plots.Type of Medium: Electronic ResourceURL: -
3Croxall, H. E. ; Davey, W. A. ; Gwynne, D. C. ; Johnson, W.
Oxford, UK : Blackwell Publishing Ltd
Published 1961Staff ViewISSN: 1365-3059Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, NutritionType of Medium: Electronic ResourceURL: -
4Staff View
ISSN: 1365-3059Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, NutritionType of Medium: Electronic ResourceURL: -
5Croxall, H. E. ; Norman, Theresa M. ; Gwynne, D. C.
Oxford, UK : Blackwell Publishing Ltd
Published 1957Staff ViewISSN: 1365-3059Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, NutritionType of Medium: Electronic ResourceURL: -
6Croxall, H. E. ; Gwynne, D. C. ; Jenkins, J. E. E.
Oxford, UK : Blackwell Publishing Ltd
Published 1952Staff ViewISSN: 1365-3059Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, NutritionType of Medium: Electronic ResourceURL: -
7Croxall, H. E. ; Gwynne, D. C. ; Jenkins, J. E. E.
Oxford, UK : Blackwell Publishing Ltd
Published 1952Staff ViewISSN: 1365-3059Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, NutritionType of Medium: Electronic ResourceURL: -
8Croxall, H. E. ; Norman, Theresa M. ; Gwynne, D. C.
Oxford, UK : Blackwell Publishing Ltd
Published 1959Staff ViewISSN: 1365-3059Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, NutritionType of Medium: Electronic ResourceURL: -
9BROWN, GWYNNE D. ; HUDSON, KAREN L. ; REECE, KIMBERLY S.
Oxford, UK : Blackwell Publishing Ltd
Published 2004Staff ViewISSN: 1550-7408Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: BiologyNotes: . Sequence analysis of genomic DNA from the protozoan parasite Perkinsus marinus at two loci revealed genetic polymorphisms within and among different cultured isolates. Genomic DNA from 12 Perkinsus marinus isolates was amplified at the internal transcribed spacer region and at an anonymous locus previously identified to contain polymorphisms by restriction fragment length polymorphism analysis. Fourteen polymorphic nucleotide positions were identified at the internal transcribed spacer region; eight in internal transcribed spacer I and six in internal transcribed spacer 2. Thirteen polymorphic nucleotide sites were identified within the anonymous locus. In some instances, more than three different sequences were observed at both the internal transcribed spacer region and at the anonymous locus from a single clonal isolate, suggesting the possibility of recombination in cultured cells and/or strand jumping during the polymerase chain reaction. Intra-isolate sequence variation (3.46% for the anonymous locus and 3.08% for internal transcribed spacer 1) was in several cases as high as inter-isolate sequence variation, even in one isolate where recombination was not evident. High intra- and inter-isolate variation detected at both loci demonstrates the importance of determining the genetic variation of each locus prior to development of sequence-based molecular diagnostics.Type of Medium: Electronic ResourceURL: -
10Staff View
ISSN: 1572-8889Keywords: sexual selection ; mate choice ; katydid ; TettigoniidaeSource: Springer Online Journal Archives 1860-2000Topics: BiologyNotes: Abstract Male katydids (Orthoptera: Tettigoniidae) invest in offspring through nutrients provided in a large spermatophore. Previous research with Requena verticalishad shown that almost all of the investment of males mating with recently mated (4 days previously) females is in eggs fertilized by the female's previous mate. Thus males are predicted to discriminate against such females as mates. In experiments placing males with both a virgin and a female mated 4–5 days previously, virgin females obtained almost all matings. Although male discrimination of mates was noted in the experiments, there was no evidence that such discrimination was against nonvirgins in both this experiment and one in which a single virgin or mated female was placed with a male. Instead, the results suggest that the differential mating was a result of interfemale competition. The mating advantage held by virgin females over nonvirgins appeared to be lost once the latter had oviposited. Finally, there was no evidence from both single- and paired-female experiments that males preferred larger females as mates.Type of Medium: Electronic ResourceURL: -
11Staff View
ISSN: 1432-1904Source: Springer Online Journal Archives 1860-2000Topics: BiologyChemistry and PharmacologyNatural Sciences in GeneralNotes: Abstract The Mormon cricket, Anabrus simplex, is one of just a few species of katydids (or bushcrickets, Orthoptera: Tettigoniidae) that, like migratory locusts, appear to have solitary and migratory morphs. Using radio telemetry we studied movements of individuals of two morphs of this flightless species. Individuals within each migratory band had similar rates of movements along similar directional headings whereas solitary individuals moved little and showed little evidence of directionality in movement. Our results also add to other recent radio-telemetry studies showing that flightless insects of 1–2 g in mass can be tracked successfully using these methods.Type of Medium: Electronic ResourceURL: -
12Staff View
ISSN: 1432-0983Keywords: Neurospora ; Cell-free ; Translation ; PreparationSource: Springer Online Journal Archives 1860-2000Topics: BiologyNotes: Summary We describe the preparation of an in vitro translation system from a wild-type strain of Neurospora crassa. The system is capable of supporting efficient and faithful translation of native and in vitro transcribed eukaryotic messages. The translation products have minimal background and can be clearly analyzed by SDS-polyacrylamide gel electrophoresis. The method of preparation of the lysate is simple, fast and reproducible. The procedure should be readily applicable to other filamentous fungi.Type of Medium: Electronic ResourceURL: -
13Staff View
ISSN: 1432-0983Keywords: Aspergillus ; Cell-free translation ; Protein translocationSource: Springer Online Journal Archives 1860-2000Topics: BiologyNotes: Summary We describe the preparation of an in vitro translation system from heat shock-treated Aspergillus nidulans, capable of supporting efficient and faithful synthesis of proteins from natural and in vitro transcribed eukaryotic messages. In vitro synthesized prepro-α-factor was translocated across Aspergillus nidulans microsomal membranes in either the homologous A. nidulans or a yeast cell-free system. The translocated prepro-α-factor was protected from digestion by protease and glycosylated to higher MW forms.Type of Medium: Electronic ResourceURL: -
14Staff View
ISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] Both male and female katydids invest parentally in eggs. The male transfers a meal consisting of the spermatophylax (part of the spermatophore) to his mate, the nutrients of which are translocated to eggs11 and increase both number and fitness of offspring sired9'12'13. For several species, the ...Type of Medium: Electronic ResourceURL: -
15Staff View
ISSN: 1432-0762Source: Springer Online Journal Archives 1860-2000Topics: BiologyNotes: Summary For species exhibiting courtship feeding it is typically argued that the food gift presented by males is a sexually-selected trait in serving to acquire fertilizations. An alternative hypothesis is that the trait is maintained by natural selection for parental investment in which the fitness of the mating male's offspring is increased. Here I argue that the spermatophylax, a nutritious part of the spermatophore provided to female katydids, Requena verticalis, functions mainly as parental investment. Previous research suggested that variation in the size of the male donation in this species (1) did not influence the ability of males to transfer ejaculates and (2) resulted in variation in offspring fitness. In the present paper genetic markers and radiolabels are used to show that the offspring are fathered by the males that donate the nutrients. Although these results indicate that the large spermatophylax is maintained by selection for increased parental investment, it is likely that this male offering originated in a sexual selection context whereby males fed females in order to obtain fertilizations.Type of Medium: Electronic ResourceURL: