Search Results - "biology"

Harvesting and conservation: are both possible for the palm, Iriartea deltoidea? by Anderson, P.J., Putz, F.E.

“…Matric models were used to develop harvesting simulations through which biological constraints on sustainable harvesting were explored. …”
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Remote sensing analysis reveals habitat, dispersal corridors and expanded distribution for the Critically Endangered Cross River gorilla Gorilla gorilla diehli by Bergl, R., Warren, Y., Nicholas, A., Dunn, A., Imong, I., Sunderland-Groves, J., Oates, J.

“…Loss of habitat reduces the carrying capacity of the landscape and fragmentation disrupts biological processes and exposes wildlife populations to the effects of small population size, such as reduction of genetic diversity and increased impact of demographic stochasticity. …”
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Long-term soil quality degradation along a cultivation chronosequence in western Kenya by Moebius-Clunee, B.N., Es, H.M. van, Idowu, O.J., Schindelbeck, R.R., Kimetu, J.M., Ngoze, S., Lehmann, Johannes, Kinyangi, James

“…Two traditional long-term management systems were sampled: continuous low-input maize (Zea mays; Co), and kitchen garden (Ki) polyculture with organic inputs. Physical, biological, and chemical SQ indicators were measured. …”
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Molecular characterization of Haemaphysalis longicornis tick salivary gland-associated 29-kilodalton protein and its effect as a vaccine against tick infestation in rabbits by Mulenga, A., Sugimoto, C., Sako, C., Ohashi, K., Musoke, A.J., Shubash, M., Onuma, M.

“…However, the success of this method is dependent on the identification cloning, and in vitro expression of tick molecules involved in the mediation of key physiological roles with respect to the biological success of a tick as a vector and pest. We have sequenced and characterized a Haemaphysalis longicornis tick salivary gland-associated cDNA coding for a 29-kDa extracellular matrix-like protein. …”
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Development of sero-diagnostic and molecular tools for the control of important tick-borne pathogens of cattle in Africa by Morzaria, S.P., Katende, J., Musoke, A.J., Nene, Vishvanath M., Skilton, Robert A., Bishop, Richard P.

“…These tools are currently being deployed in conjunction with field immunisation programmes to determine the biological impact of introducing live vaccines of T. parva on population dynamics.…”
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Profitability of forage production in smallholder peri-urban dairy production systems by Agyemang, K., Dogoo, D.L., Makun, H.J.

“…In three trials involving indigenous Bunaji cows biological and economic responses in terms of milk yields to farmer-planted forage legumes and tree legumes from home gardens were evaluated. …”
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An accessory role for the diacylglycerol moiety of variable surface glycoprotein of African trypanosomes in the simulation of bovine monocytes by Sileghem, M.R., Saya, R., Grab, D.J., Naessens, Jan

“…Integrity of the anchor and efficiency of cleavage was verified by autoradiography and methanol:hexane extraction. For analysis of biological function, bovine monocytes were used which had been incubated with bovine interferon y (primed) or with culture medium (unprimed). …”
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Mathematical modelling of livestock production systems: Application of the Texas A & M University beef cattle production model to Botswana by International Livestock Centre for Africa

“…The discussion in this chapter focuses on the biological responses of the systems to the various interventions. …”
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Evaluación del modelo de simulación CERES-maize aplicado a una variedad de maíz en oxisoles de los Llanos Orientales de Colombia by Rivera Peña, M., Amézquita Collazos, Edgar

“…Intensification of agricultural production on the acid-soil savannas of south America (mainly Oxisols) is constrained by the lack of diversity in acid (aluminum) tolerant crop germplasm, poor soil fertility and high vulnerability to soil physical, chemical and biological degradation. The model of simulation of growth and production of maize CERES-Maize DSSATv3.5, was evaluated to level of the Tropic. …”
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Parámetros poblacionales de Zulia carbonaria (Hemiptera: Cercopidae) sobre Brachiaria ruziziensis by Rodríguez Chalarca, Jairo, Peck, DC

“…To complement biological studies developed at CIAT on grass-feeding spittlebugs (Hemiptera: Cercopidae), a life table was established for the specific case of Zulia carbonaria (Lallemand). …”
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Problemática de Trialeurodes vaporariorum y Bemisia tabaci (Homoptera: Aleyrodidae) como plagas de cultivos semestrales en el Valle del Cauca by Rodríguez Torres, Isaura Viviana, Cardona Mejía, César

“…To identify species and biotypes of these insects, 78 biological samples were taken in 15 different localities. …”
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Impacts of trypanosomosis on land-use and the environment in Africa: State of our knowledge and future directions by Reid, Robin S.

“…These changes in land-use/land cover can have unanticipated impacts on biological diversity and vegetative structure. These and other results are synthesized into a picture of our current knowledge and future directions about tsetse/trypanosomosis control, land-use and the environment.…”
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The arid and semiarid low lands of Ethiopia: Environments, pastoral economies and issues in natural resources sustainability by Coppock, D. Layne

“…This paper reviews the physical and biological features of the lowlands and some Development perspectives that have been pursued since the 1970s. …”
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Biodiversity and Ecosystem Services of Agricultural Landscapes. Agroecology for Food Security and Nutrition by DeClerck, Fabrice A.J., Estrada-Carmona, Natalia, Garbach, K., Martínez Salinas, A.

“…We provide an example from the Volcanica Central Talamanca Biological Corridor in Costa Rica, where significant research has been undertaken, and is beginning to show where synergistic interactions between conservation, agricultural production and hydropower generation can be managed for multiple benefits. …”
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Suppression of the ubiquitin E2 gene through RNA interference causes mortality in the banana weevil, Cosmopolites sordidus (Germar) by Ocimati, W., Kiggundu, A., Bailey, A., Niblett, C.L., Pedun, H., Tazuba, A.F., Tushemereirwe, Wilberforce K., Karamura, E.B.

“…In this study, we explored the use of RNAi for the control of the banana weevil that is not only the most important banana pest in East Africa, but has also eluded control through cultural, chemical and biological approaches. The ubiquitin E2 gene, essential for protein catabolism was identified, amplified and transcribed into dsRNA and fed to banana weevil larva in in vitro bioassays. …”
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Degeneration of aflatoxin gene clusters in Aspergillus flavus from Africa and North America by Adhikari, B.N., Bandyopadhyay, Ranajit, Cotty, P.J.

“…Comparative analyses of aflatoxin gene clusters provides insight into the diversity of mechanisms of non-aflatoxigenicity in A. flavus genotypes used as biological control agents. The sequences provide resources for both diagnosis of non-aflatoxigenicity and monitoring of biocontrol genotypes during biopesticide manufacture and in the environment.…”
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The sustainability of the world’s soils by Hauser, S., Norgrove, L.

“…This is defi ned as factors that: • maintain or improve soil biological, chemical, and physical properties; • maintain an input:output (harvest) ratio greater than one for all macronutrients; • use nutrient inputs, preferably but not exclusively from renewable rather than nonrenewable sources that seek to complement natural nutrient cycling; and • permit the system to recover from the disturbances caused by cultivation and harvest (adapted after Schaller 1993). …”
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Water relations strategies of two grass and shrub species as influenced by prescribed burning in a semiarid ecosystem in Kenya. by Ali, A.R.

“…Most significant differences observed were numerically small and perhaps not biologically meaningful.Few large significant differences were observed but the cause for the differences was unknown. …”
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The predatory mite Typhlodromalus aripo prefers greenmite induced plant odours from pubescent cassava varieties by Onzo, A., Hanna, R., Sabelis, M.W.

“…This knowledge can be useful in selecting cultivars that are attractive and suitable to T. aripo, which, in turn, may promote biological control of the cassava green mite.…”
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Members of Gammaproteobacteria as indicator species of healthy banana plants on Fusarium wilt-infested fields in Central America by Koberl, M., Dita, M., Martinuz, A., Staver, Charles, Berg, G.

“…This first study examining banana microbiome shifts caused by FW under natural field conditions opens new perspectives for its biological control.…”
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