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Showing 1 to 20 of 151 for “"Population biology"”.
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A population biology of breeding redshanks (Tringa totanus L.)
A breeding population of Redshanks was studied by trapping adults at the nest and individually marking them, over a period of nine years, on part of the extensive Ribble saltmarshes. Other aspects of breeding biology were investigated over three years. The capture-recapture analysis of the breeding …
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The population biology of Ligia oceanica (L.)(Crustacea: Oniscoidea)
The dynamics and life history of an isolated population of Ligia oceanica (L. ) inhabiting a sea-wall exposed to moderate wave action have been studied over a period of three years. Sex ratio, size at maturity, growth, breeding phenology, size and age structure, population density and size, female …
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Population Biology of Ambrosia Trifida, an Annual Community Organizer
Made available in DSpace on 2014-12-14T13:23:14Z (GMT). No. of bitstreams: 1 7803922.pdf: 3649655 bytes, checksum: 0f79fbffb62fa41ae13ae5d469d04384 (MD5) Previous issue date: 1977
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Aspects of population biology and behaviour of mobulid rays
… in Mozambique is known to be home to the largest populations of manta rays in Africa, including the reef manta ray (M. alfredi) and the oceanic manta ray (M. birostris). However, research on other mobulid species, and in the region south of Tofo, including Závora in Mozambique and South Africa, …
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The ecology and population biology of two litter decomposing basidiomycetes
… on hardwood leaves and small woody detritus. The population structure of both of these species was investigated using tests of somatic incompatibility. Genets of both species are able to persist for more than one year. The observed minimum population density is 0.071 - 0.121 genets/m² for M. …
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Population Biology of Daubaylia potomaca (Nematoda:Rhabditida) in Mallard Lake, North Carolina
Daubaylia potomaca is a unique nematode parasite that has a direct life cycle through the pulmonate snail Helisoma anceps with the adult female nematode being the infective stage. Found in all tissues and blood spaces, this parasite was ultimately found to decrease the life span of its snail host. …
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Linking mosquito midgut and virus population biology at the molecular and cellular level
… that may impose bottlenecks on virus populations. West Nile virus (WNV) is maintained by multiple mosquito species with varying VC. However, the extent that bottlenecks and VC are linked is poorly understood. Similarly, quantitative analyses of mosquito-imposed bottlenecks on virus …
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Population biology and ecology and of Periplaneta americana (L.) in the urban environment
… are the principal reservoirs for P. americana population in the temperate urban environn1ent. Investigations provided new evidence that basements of the RRHA-LT apartment buildings served as secondary reservoirs for this pest species. Environmental and ecological parameters that characterize …
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The population Biology of Sclerocarya birrea at Nylsvley Nature Reserve, Limpopo Province, South Africa
… overall aim of this study was to determine the population biology of Sclerocarya birrea (A Rich) Hochst., subspecies caffra (Sond) at Nylsvley Nature Reserve, Limpopo, South Africa. Sclerocarya birrea is a keystone plant species which is rated as one of the most highly valued indigenous trees …
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Population biology of Cryphonectria parasitica infected with Cryphonectria hypovirus 1 on American chestnut trees
In the early 1900's the American chestnut (Castanea dentata (Marsh.) Borkh.) was nearly destroyed by the introduction of the orange-pigmented, chestnut blight fungus (Cryphonectria parasitica (Murr.) Barr). Chestnut blight is less severe in Europe, where hypovirulent (= reduced virulence) strains …
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Population biology, behavioural ecology and management of the Redwing Francolin Francolinus levaillantii and Swainson's Spurfowl Pternistis swainsonii
… habitat transformation via agriculture on their population biology.
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Population Biology and Landscape Ecology of Digenetic Trematode Parasites in their Gastropod Hosts, with Special Emphasis on Echinostoma spp.
Digenetic trematode parasites are characterized by having complex life cycles involving both vertebrate and invertebrate hosts, and are grouped into 1 of 2 categories. Allogenic parasites have at least one host capable of moving between aquatic habitats, while autogenic species have all hosts …
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Population Biology Of A Coastal Dune-Dwelling Spider (Arctosa Sanctaerosae) Along The Hurricane Disturbed Northern Gulf Of Mexico Coast
… The data presented here explore the status of populations of this species spanning the entire known range and the factors influencing population demography. These findings demonstrate the significant impact of storms on both disturbed and undisturbed habitat and reveal factors influencing the …
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Population biology of two key fish species and the dynamics and management of the trap fishery in Beung Borapet, Thailand
… Asia, yet there is limited information on the biology of important species and catch rates in fisheries, and limited assessment of management strategies such as Freshwater Protected Areas. This study has provided important information on aspects of the biology of knifefish (Notopterus …
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Population Biology of the Tan Riffleshell (<I>Epioblasma florentina walkeri</I>) and the Effects of Substratum and Light on Juvenile Propagation
… is restricted to only one known reproducing population, in Indian Creek, Tazewell County, Virginia. Attempts to recover this species by augmenting relic populations throughout its historic range are aided through knowledge of its population biology and requirements in culture environments. …
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Factors affecting VA-mycorrhizal community structure in the Namib Dune Field: and the population biology of an ectomycorrhizal Basidiomycete: Suillus granulatus
… structure of VAmycorrhizal fungi and the population biology of an ectomycorrhizal addressed. The Basidiomycete, distributional Suillus granulatus, were ecology of VAM fungal communities with grasses was studied across a climatic gradient in the hyper-arid central Namib dune field. VAM …
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