Browsing Research Articles (Zoology and Entomology) by Title

Browsing Research Articles (Zoology and Entomology) by Title

Sort by: Order: Results:

  • Nectar intake of White-Bellied Sunbirds (Cinnyris talatala) : can meal size be inferred from feeding duration? 
    Koehler, Angela; Verburgt, Luke; Nicolson, Sue W. (University of Chicago Press, 2008)
    A positive relationship between feeding duration and meal size of avian nectarivores has often been assumed in earlier studies. We investigated whether feeding duration can be used as a surrogate for the amount of sugar ...
  • Nectar palatability can selectively filter bird and insect visitors to coral tree flowers 
    Nicolson, Sue W.; Lerch-Henning, Sara; Welsford, Megan; Johnson, Steven D. (Springer, 2015-03)
    Secondary compounds in nectar may play a decisive role in determining the spectrum of floral visitors on plants. Flowers of the African coral tree Erythrina caffra are visited mainly by generalist passerine nectarivores, ...
  • Need for shared internal mound conditions by fungus-growing Macrotermes does not predict their species distributions, in current or future climates 
    Seymour, Colleen L.; Korb, Judith; Joseph, Grant S.; Hassall, Richard; Coetzee, Bernard Walter Thomas (Royal Society, 2023-08)
    The large, iconic nests constructed by social species are engineered to create internal conditions buffered from external climatic extremes, to allow reproduction and/or food production. Nest-inhabiting eusocial Macrotermitinae ...
  • Negative effects of nitrogen override positive effects of phosphorus on grassland legumes worldwide 
    Tognetti, Pedro M.; Prober, Suzanne M.; Baez, Selene; Chaneton, Enrique J.; Firn, Jennifer; Risch, Anita C.; Schuetz, Martin; Simonsen, Anna K.; Yahdjian, Laura; Borer, Elizabeth; Seabloom, Eric W.; Arnillas, Carlos Alberto; Bakker, Jonathan D.; Brown, Cynthia S.; Cadotte, Marc W.; Caldeira, Maria C.; Daleo, Pedro; Dwyer, John M.; Fay, Philip A.; Gherardi, Laureano A.; Hagenah, Nicole; Hautier, Yann; Komatsu, Kimberly J.; McCulley, Rebecca L.; Price, Jodi N.; Standish, Rachel J.; Stevens, Carly J.; Wragg, Peter D.; Sankaran, Mahesh (National Academy of Sciences, 2021-07)
    Anthropogenic nutrient enrichment is driving global biodiversity decline and modifying ecosystem functions. Theory suggests that plant functional types that fix atmospheric nitrogen have a competitive advantage in nitrogen-poor ...
  • Neonicotinoid insecticides can serve as inadvertent insect contraceptives 
    Straub, Lars; Villamar-Bouza, Laura; Bruckner, Selina; Chantawannakul, Panuwan; Gauthier, Laurent; Khongphinitbunjong, Kitiphong; Retschnig, Gina; Troxler, Aline; Vidondo, Beatriz; Neumann, Peter; Williams, Geoffrey R. (The Royal Society, 2016-05-06)
    There is clear evidence for sublethal effects of neonicotinoid insecticides on non-target ecosystem service-providing insects. However, their possible impact on male insect reproduction is currently unknown, despite the ...
  • Neonicotinoid pesticides can reduce honeybee colony genetic diversity 
    Forfert, Nadege; Troxler, Aline; Retschnig, Gina; Gauthier, Laurent; Straub, Lars; Moritz, Robin F.A.; Neumann, Peter; Williams, Geoffrey R. (Public Library of Science, 2017-10-23)
    Neonicotinoid insecticides can cause a variety of adverse sub-lethal effects in bees. In social species such as the honeybee, Apis mellifera, queens are essential for reproduction and colony functioning. Therefore, any ...
  • Neonicotinoid pesticides severely affect honey bee queens 
    Williams, Geoffrey R.; Troxler, Aline; Retsching, Gina; Roth, Kaspar; Yanez, Orlando; Shutler, Dave; Neumann, Peter; Gauthier, Laurent (Nature Publishing Group, 2015-10-13)
    Queen health is crucial to colony survival of social bees. Recently, queen failure has been proposed to be a major driver of managed honey bee colony losses, yet few data exist concerning effects of environmental stressors ...
  • Neonicotinoids decrease sucrose responsiveness of honey bees at first contact 
    Démares, Fabien J.; Demares, Fabien J.; Pirk, Christian Walter Werner; Nicolson, Sue W.; Human, Hannelie (Elsevier, 2018-07)
    For two decades, neonicotinoid insecticides have been extensively used worldwide. Targeting neuronal receptors, they have deleterious effects on the behaviour and physiology of many insects. Bees are exposed to these ...
  • Nest architecture as a tool for species discrimination of Hypotrigona species (Hymenoptera: Apidae: Meliponini) 
    Ndungu, Nelly N.; Yusuf, Abdullahi Ahmed; Raina, S.K.; Masiga, D.K.; Pirk, Christian Walter Werner; Nkoba, K. (Entomological Society of Southern Africa, 2019-03)
    Hypotrigona species are difficult to identify morphologically. Here, we show that nest sites and nest architecture can be used to discriminate three Hypotrigona species found in Kenya. Hypotrigona gribodoi, H. araujoi and ...
  • Nest sites selection by sympatric cavity-nesting birds in miombo woodlands 
    Nyirenda, Vincent R.; Chewe, Felistus C.; Chisha-Kasumu, Exildah; Lindsey, Peter Andrew (AOSIS Open Journals, 2016-07-26)
    Deforestation and habitat fragmentation have long been known as drivers of wildlife depletion but information on their specific impacts on cavity-nesting birds in the miombo woodlands has been lacking. A comparative study ...
  • Nestmate recognition and the role of cuticular hydrocarbons in the African termite raiding ant Pachycondyla analis 
    Yusuf, Abdullahi Ahmed; Pirk, Christian Walter Werner; Crewe, Robin M.; Njagi, Peter G.N.; Gordon, Ian; Torto, Baldwyn (Springer, 2010-04)
    Cuticular hydrocarbons (CHCs) are used for chemical communication among nestmates in many ant species, and they may play a role in the discrimination of nestmates and non-nestmates. Using the mandible opening response ...
  • Net effects of multiple stressors in freshwater ecosystems : a meta-analysis 
    Jackson, Michelle C.; Loewen, Charlie J.G.; Vinebrooke, Rolf D.; Chimimba, Christian Timothy (Wiley, 2016-01)
    The accelerating rate of global change has focused attention on the cumulative impacts of novel and extreme environmental changes (i.e. stressors), especially in marine ecosystems. As integrators of local catchment and ...
  • Network topology of stable isotope interactions in a sub-arctic raptor guild 
    Dalerum, Fredrik; Hellström, P.; Miranda, M.; Nyström, J.; Ekenstedt, J.; Angerbjörn, A. (Springer, 2016-10)
    Predation is an ecologically important process, and intra-guild interactions may substantially influence the ecological effects of predator species. Despite a rapid expansion in the use of mathematical graph theory to ...
  • Neuroendocrine correlates of sex-role reversal in barred buttonquails 
    Voigt, Cornelia (The Royal Society, 2016-11)
    Sex differences in brain structure and behaviour are well documented among vertebrates. An excellent model exploring the neural mechanisms of sex differences in behaviour is represented by sex-role-reversed species. In the ...
  • New collection records for Theraphosidae (Araneae, Mygalomorphae) in Angola, with the description of a remarkable new species of Ceratogyrus 
    Midgley, John M.; Engelbrecht, I.A. (Ian) (Pensoft Publishers, 2019-02-06)
    During 2015 and 2016 several baboon spider specimens (Araneae: Theraphosidae) were collected in central Angola during surveys undertaken for the Okavango Wilderness Project. These collections represent range and habitat ...
  • A new comparative metric for estimating heterothermy in endotherms 
    Boyles, Justin G.; Smit, Ben; McKechnie, Andrew E. (University of Chicago Press, 2011)
    A major focus in the study of endothermic thermoregulation has been the description of thermoregulatory patterns used by various species and/or populations. Compared with ectotherms, relatively few attempts have been ...
  • New descriptions and revisions of southern African Cetoniinae (Coleoptera : Scarabaeidae). I 
    Holm, E.; Perissinotto, Renzo (Entomological Society of Southern Africa, 2011-03)
    The female of the Cape relict Meridioclita capensis Krikken, 1982 and two new subspecies of Ichnestoma are described. Ichnestoma cuspidata cochleata subsp. n. and I. struempheri kikvorsti subsp. n. are new microendemics ...
  • A new design for honey bee hoarding cages for laboratory experiments 
    Kohler, Angela; Nicolson, Sue W.; Pirk, Christian Walter Werner (International Bee Research Association, 2013)
    Honey bees are the subject of research around the world due to their great economic importance and current population declines (vanEngelsdorp and Meixner, 2010). Many studies cannot be conducted at the colony level. ...
  • New distribution records of herpetofauna in Mozambique south of the Zambezi River, including additional records from Parque Nacional de Banhine 
    Pietersen, Darren William (Transvaal Museum, 2014-02)
    The herpetofauna of Mozambique remains poorly documented despite several recent surveys. This paper presents additional distribution records for a number of species from Mozambique, based on recent field excursions and ...
  • New dung beetle (Coleoptera : Scarabaeidae : Scarabaeinae) taxa from arid south-western Africa 
    Deschodt, Christian M.; Davis, Adrian L.V.; Scholtz, Clarke H. (Brill, 2011-07)
    In this paper we describe new taxa and discuss others previously described from arid south-west Africa. Descriptions are provided for a new monotypic genus (Variuscorpus Deschodt, Davis and Scholtz gen. n.) and three new ...