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  1. No Access

    Article

    Assessing the condition of lake habitats: a test of methods for surveying aquatic macrophyte communities

    The European Union requires member states to monitor the conservation status of water bodies designated under the Habitats and Species Directive. In the UK, macrophytes were identified as useful indicators of ...

    Iain D. M. Gunn, Matthew O’Hare, Laurence Carvalho, David B. Roy… in Hydrobiologia (2010)

  2. No Access

    Article

    Littoral biodiversity across scales in the Seychelles, Indian Ocean

    The 16 Marine Protected Areas in the Seychelles Archipelago (Western Indian Ocean) are monitored by a wide range of scientific and conservation organizations, but these mainly focus on coral or fish. We have i...

    David K. A. Barnes, Richard S. K. Barnes, David J. Smith… in Marine Biodiversity (2009)

  3. No Access

    Article

    Harmonia axyridis in Great Britain: analysis of the spread and distribution of a non-native coccinellid

    Harmonia axyridis (Pallas) (Coleoptera: Coccinellidae) is native to Asia, and was widely introduced as a biocontrol agent of aphids and coccids in Europe and North America. In Europe H. axyridis is considered to ...

    Peter Michael James Brown, Helen E. Roy, Peter Rothery, David B. Roy… in BioControl (2008)

  4. No Access

    Article

    Interactions between the fungal pathogen Beauveria bassiana and three species of coccinellid: Harmonia axyridis, Coccinella septempunctata and Adalia bipunctata

    Harmonia axyridis is a predatory coccinellid, native to central and eastern Asia. It has been available in many countries for use as a biological control agent of pest aphids and scale insects. In many of these c...

    Helen Elizabeth Roy, Peter M. J. Brown, Peter Rothery, Remy L. Ware… in BioControl (2008)

  5. No Access

    Chapter

    Interactions between the fungal pathogen Beauveria bassiana and three species of coccinellid: Harmonia axyridis, Coccinella septempunctata and Adalia bipunctata

    Harmonia axyridis is a predatory coccinellid, native to central and eastern Asia. It has been available in many countries for use as a biological control agent of pest aphids and scale insects....

    Helen Elizabeth Roy, Peter M. J. Brown… in From Biological Control to Invasion: the L… (2008)

  6. No Access

    Chapter

    Harmonia axyridis in Great Britain: analysis of the spread and distribution of a non-native coccinellid

    Harmonia axyridis (Pallas) (Coleoptera: Coccinellidae) is native to Asia, and was widely introduced as a biocontrol agent of aphids and coccids in Europe and North America. In Europe H. axyridis is c...

    Peter Michael James Brown, Helen E. Roy… in From Biological Control to Invasion: the L… (2008)

  7. No Access

    Article

    Long-term decline in krill stock and increase in salps within the Southern Ocean

    Antarctic krill (Euphausia superba) and salps (mainly Salpa thompsoni) are major grazers in the Southern Ocean1,2,3,4, and krill support commercial fisheries5. Their density distributions1,3,4,6 have been describ...

    Angus Atkinson, Volker Siegel, Evgeny Pakhomov, Peter Rothery in Nature (2004)

  8. No Access

    Article

    Confidence limits for regression relationships between distance matrices: Estimating gene flow with distance

    There is growing interest in assessing relation ships between two or more distance matrices, where distances are based on genetic, geographical, and/or environmental measures of dissimilarity for all pairwise ...

    Ralph T. Clarke, Peter Rothery… in Journal of Agricultural, Biological, and E… (2002)

  9. No Access

    Chapter

    Analysis of Population Fluctuations in the Aphid Hyperomyzus Lactucae and the Moth Perizoma Alchemillata

    The two other insect datasets used in the analyses in this book (Lucilia, Smith et al., Chapter 7 and Plodia, Begon et al., Chapter 6) are from controlled laboratory experiments. In contrast, the datasets present...

    Ian P. Woiwod, Peter Rothery, **long Zhou in Chaos in Real Data (2000)

  10. No Access

    Chapter

    The problems associated with the identification of density dependence in population data

    Density dependence occurs when the per capita growth rate of a population depends on its own density. This symposium defines direct density dependence as a decrease in the rate of population growth as population ...

    Peter Rothery in Insect Populations In theory and in practice (1998)

  11. No Access

    Article

    Testing for density dependence allowing for weather effects

    A test for density dependence in time-series data allowing for weather effects is presented. The test is based on a discrete time autoregressive model for changes in population density with a covariate for th...

    Peter Rothery, Ian Newton, Lois Dale, Tomasz Wesolowski in Oecologia (1997)

  12. No Access

    Article

    Offspring sex ratio in relation to female size in southern elephant seals, Mirounga leonina

    Southern elephant seals Mirounga leonina display extreme sexual dimorphism. In addition females show great variation in size and stored resources at parturition. Therefore they present an excellent opportunity fo...

    Tom Arnbom, M. A. Fedak, Peter Rothery in Behavioral Ecology and Sociobiology (1994)

  13. No Access

    Article

    Ice nucleation studies of two beetles from sub-antarctic South Georgia

    Supercooling points of adults and larvae of the coleopterans Hydromedion sparsutum and Perimylops antarcticus at South Georgia ranged from -3.0 to -5.4°C with Perimylops freezing at c.1.6°C lower than Hydromedion

    Roger Worland, William Block, Peter Rothery in Polar Biology (1993)

  14. No Access

    Article

    Factors causing the limitation of growth of terrestrial algae in maritime Antarctica during late summer

    The factors causing the cessation of growth and decline of microalgal communities on Antarctic fell-field soils during late summer were investigated. Physical and chemical amendments were applied within small ...

    Martin C. Davey, Peter Rothery in Polar Biology (1992)

  15. No Access

    Article

    Survival of sub-zero temperatures by two South Georgian beetles (Coleoptera, Perimylopidae)

    The ability of adults and larvae of two species of perimylopid beetles (Hydromedion sparsutum, Perimylops antarcticus) to survive sub-zero temperatures was studied at Husvik, South Georgia in summer during Octobe...

    Roger Worland, William Block, Peter Rothery in Polar Biology (1992)