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Showing 1 to 20 of 44 for “"Cyclops"”.
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Birds as a dispersal agent for Acacia cyclops
… birds in relation to the seed production of A. cyclops; 2) determine any selective feeding preferences for A. cyclops seeds, using Cape Turtle doves (Streptopelia capicola); 3) estimate the calorific utilization by Cape Turtle doves of A. cyclops seeds; and finally, 4) assess any effects on the …
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Olfactory responses of Dasineura Dielsi Rübsaamen (Diptera: Cecidomyiidae) females to host plant volatiles
… on the invasive alien plant species, Acacia cyclops (Mimosaceae). An investigation was launched to test the following hypotheses: 1) the midges respond to the scent of A. cyclops to locate suitable oviposition sites; 2) the floral scent of A. melanoxylon, A. longifolia and A. saligna …
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Seed-reducing Cecidomyiidae as potential biological control agents for invasive Australian wattles in South Africa, particularly Acacia mearnsii and A. cyclops
The collection of gall-forming Cecidomyiidae specimens and their parasitoids from Australia and South Africa during this project produced a large and valuable assemblage of material, most of which will be or has been lodged with the National Insect Collection (Pretoria) (parasitoids) or the South …
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Biological control of Acacia cyclops in South Africa : the role of an introduced seed-feeding weevil, Melanterius servulus (Coleoptera: Curculionidae), together with indigenous seed-sucking bugs and birds
Acacia cyclops A. Cunn ex G. Don, or rooikrans (Fabaceae), of Australian origin, is an invasive environmental weed in South Africa where it threatens the unique vegetation of the Cape Floral Kingdom. The invasiveness of the plant in South Africa is, in part, due to its high annual seed-yields, …
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Patterns of parasitism and emergence in the gall midge Dasineura Dielsii (Diptera: Cecidomyiidae) : a biological control agent of Acacia cyclops in South Africa
Acacia cyclops A. Cunn. ex G. Don is an invasive alien plant that invades fynbos and coastal dunes. Several acacia species are grown commercially in South Africa and this has limited biocontrol agents to those that reduce only reproductive capacity. Dasineura dielsii was released in 2002 as a …
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Seed biology of a recently introduced species, Myoporum laetum in comparison to a successful invasive alien, Acacia cyclops, in the southwestern Cape, South Africa
… those of another bird-dispersed alien, Acacia cyclops which is a successful invader in this region. M. laetum has higher annual seed production, but lower soil-stored seed banks than A. cyclops. Both experience high seed predation, especially under parent canopies. M. laetum has a more …
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A comparative study of the seed bank dynamics of two congeneric alien invasive species
… invaders in the region, Acacia saligma and A. cyclops, was studied to elucidate those factors contributing most to their invasive success. This information was then used to assist in developing optimal control methods. On the basis of information available prior to this study, it was predicted …
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Feeding of Naupliar and Adult Carnivorous Cyclopoids (Crustacea : Copepoda)
… of prey types. Predator species included "Cyclops bicuspidatus thomasi", "Mesocyclops edax, and "Cyclops vernalis". Findings: Adult cyclopoids predated on cyclopoid nauplii, "Bosmina", "Asplanchna", and "Paramecium", but not on "Ceriodaphnia", ostracods, "Selenastrum", nor bacteria. One-day …
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The Other Side of the Fence
… the glowing red lens of a stop light becomes a Cyclops poised to defend his garden. Candy-coated, blooming, dripping and seductively slick confronts you with the obvious warning: STOP! You could be next… …The grass really is greener on The Other Side of the Fence. At least until winter comes.
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Evolution and vulnerabilities of somatic copy number alterations in cancer
… We identify a class of interactions called CYCLOPS interactions in which genomic loss of essential genes sensitizes cancer cells to their further suppression. We explore the properties of CYCLOPS genes and show that the splicing factor SF3B1 is one of them. Biochemical analyses showed that …
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Friend or foe? The arrival of Stator limbatus (Bruchidae) in South Africa
… alien plant species Acacia mearnsii and A. cyclops. This study conducted a preliminary examination of its oviposition preference, and development on, a number of indigenous and invasive alien Acacia species and the invasive alien Paraserianthes lophantha (all Fabaceae). Oviposition …
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The role of aquatic macrophytes in the availability of food for young fish
… and 245ug/l). The weedbeds were dominated by Cyclops vernalis americanus and Ceriodaphnia pulchella and the open water by Bosmina longirostris and C. vernalis americanus. C. pulchella and B. longirostris seemed mutually exclusive . Evidence from a second gravel-pit lake (lower fish stock) …
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Food Habits of Walleyes in Lake Oahe, South Dakota
… fed on zooplankton. Copepods, Diaptomus and Cyclops, were initially important for zooplanktivorous walleyes with Diaptomus being elected for and Cyclops elected against. Daphnia became important on 17 June and were elected for through September. Walleyes became piscivorous by 17 June. …
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Effects of natural vegetation, fire and alien plant invasion on bird species assemblages in mountain fynbos of the southwestern Cape Province, South Africa
… an indigenous bird species ate alien Acacia cyclops fruits, and potentially dispersed its seeds, and the number of nectarivorous birds which visited an isolated nectar resource. Avian responses to fire in Mountain Fynbos varied according to season, locality and burning regime. Recently and …
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Historical ecology of alien woody plants in the vicinity of Cape Town, South Africa
… man has been a major factor in dispersing Acacia cyclops, A. saligna, Hakea suaveolens and Pinus pinaster in the region. On the other hand, man has played only a minor role in the spread of Acacia longifolia, Albizia lophantha and Hakea sericea. Man's role in regard to the other six species is …
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Crustacea Zooplankton Communities in Icelandic Lakes Comparison Over Time
… concentrations. Mandibular morphology in Cyclops abyssorum G. O. Sars, 1863 was further examined as a case study of intraspecific variation. Species richness showed a slight but significant increase over time, whereas Pielou’s evenness declined marginally. Overall temporal changes were …
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