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A comparison of different planting methods, including hydrogels, and their effect on eucalypt survival and initial growth in South Africa
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: PaulW.M. Viero KeithM. LittleResearch to minimize mortality and enhance early growth during the re-establishment of eucalypts includes the use of optimum growing stock and planting techniques, the application of adequate volumes of water at planting (where appropriate), correct fertilizer application and placement, and... -
Relationships between growth, mineral nutrition and site factors for Eucalyptus camaldulensis (Dehnh) planted in some communal areas of Zimbabwe
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: Abisai Mushaka --- Forest Research Centre, ZimbabweThe Forestry Commission of Zimbabwe has been implementing a Rural Afforestation Project since 1983. The main species promoted were the eucalypts, especially Eucalyptus camaldulensis (Dehnh). A survey of twenty-seven woodlots of E. camaldulensis with ages between I and 10 years... -
Validation of the periodicity of growth increment deposition in otoliths from the larval and early juvenile stages of two cyprinids from the Orange–Vaal river system, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: BR Paxton --- Water Research Group (Ecology), School of Environmental Sciences and Development, Potchefstroom Campus, South Africa GC O'Brien --- Water Research Group (Ecology), School of Environmental Sciences and Development, Potchefstroom Campus, South Africa JA Slingsby --- South African Environmental Observatory Network, South Africa R Copin --- Zoology Department, South AfricaThis study tested the hypothesis that growth increments in larval largemouth yellowfish Labeobarbus kimberleyensis and smallmouth yellowfish L. aeneus from the Orange–Vaal river system, South Africa, are deposited daily. The periodicity of increment formation was determined by regular sampling and... -
Application of a Factorial Design to a Thinning Experiment in Eucalyptus grandis, with Intermediate Results
Item type: Journal Article • Journal: South African Forestry Journal • Authors: A. P.G. Schönau --- , South AfricaThe background is given to the choice of experimental design for a thinning experiment in E. grandis. A 34 factorial experiment confounded in randomised incomplete blocks of nine units was preferred with thinning intensity, age of first thinning, interval between... -
A Comparison of Three Methods of Wood Density Assessment in a Pinus elliottii Progeny Test
Item type: Journal Article • Journal: South African Forestry Journal • Authors: G. Gough --- Forest Research Centre, R.D. Barnes --- ,Three methods of determining wood density of 15 Pinus elliottii Engelm. families in a progeny test were compared. The first was based on a segment cut from a disc, the second on an 8 mm increment core and the third... -
Growth models based on radial increment observations for eight pine species in Angola
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Cristobal Delgado-Matas --- Faculty of Agrarian Sciences, Angola Timo Pukkala --- School of Forest Sciences, FinlandGrowth models for the Central Highlands of Angola were developed in this study for Pinus pseudostrobus Lindl., P. kesiya Royle ex Gordon, P. devoniana Lindl., P. chiapensis (Martinez) Andresen, P. elliottii Engelm., P. greggii Engelm. ex Parl., P. montezumae Lamb... -
Preliminary examination of hatching season and growth of Engraulicypris sardella (Pisces: Cyprinidae) larvae and juveniles in Lake Malawi
Item type: Journal Article • Journal: African Zoology • Authors: Shinsuke Morioka --- Department of Aquaculture and Fisheries Science, Bunda College of Agriculture, Malawi Emmanuel Kaunda --- Department of Aquaculture and Fisheries Science, Bunda College of Agriculture, MalawiThe hatching period and the growth of Malawian cyprinid Engraulicypris sardella larvae and juveniles collected from two sites along the southwestern shoreline of Lake Malawi were investigated using otolith increment information. The lapillus was used to determine the age in... -
Otolith features and growth of juvenile Opsaridium microcephalum (Pisces: Cyprinidae) from the southwestern shoreline of Lake Malawi
Item type: Journal Article • Journal: African Zoology • Authors: Shinsuke Morioka --- Department of Aquaculture and Fisheries Science, Bunda College of Agriculture, MalawiSanjika, Opsaridium microcephalum, were collected from two sites (Nkhotakota and Chia) along the southwestern shoreline of Lake Malawi. The sagitta of the otolith was arrowhead-shaped with an obvious nucleus. Increments in the sagittae were observable until the bases of the... -
Assessment of three-year DBH and height data and genetic gain prediction for five Acacia mearnsii (black wattle) subpopulations in South Africa using REML/BLUP
Item type: Journal Article • Journal: Southern Hemisphere Forestry Journal • Authors: SL Beck J de Guisti AK Louw MDV ResendeRecent research has shown Acacia mearnsii (black wattle) to be a source of high-quality pulp. This led to a change in the emphasis in the breeding programme at the Institute for Commercial Forestry Research, from improving bark yield and quality,... -
Carbon stocks and productivity of mangrove forests in Tanzania
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Marco A Njana --- National Carbon Monitoring Centre, Tanzania Eliakimu Zahabu --- National Carbon Monitoring Centre, Tanzania Rogers E Malimbwi --- Department of Forest Mensuration and Management, TanzaniaMangroves offer a number of ecosystem goods and services, including carbon (C) storage. As a carbon pool, mangroves could be a source of CO2 emissions as a result of human activities such as deforestation and forest degradation. Conversely, mangroves may... -
Validation of the periodicity of growth zone deposition in otoliths of two large endemic Labeobarbus species in Lake Tana, Ethiopia
Item type: Journal Article • Journal: African Zoology • Authors: Shewit Gebremedhin --- Department of Animal Science and Aquatic Ecology, Belgium Karen Bekaert --- Flanders Research Institute for Agriculture, Fisheries, and Food (ILVO), Belgium Abebe Getahun --- Department of Zoological Sciences, Ethiopia Stijn Bruneel --- Department of Animal Science and Aquatic Ecology, Belgium Wassie Anteneh --- Department of Biology, Ethiopia Els Torreele --- Flanders Research Institute for Agriculture, Fisheries, and Food (ILVO), Belgium Peter Goethals --- Department of Animal Science and Aquatic Ecology, BelgiumAlthough validation of the rate of growth zone deposition is a prerequisite for accurate age estimation, such studies are non-existent for the endemic Labeobarbus species in Lake Tana. Therefore, the aim of the current study was to validate the periodicity... -
Analysing species site-specific tree growth, mortality and in-growth for miombo woodlands in Tanzania
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: E E Njoghomi --- , Tanzania S Valkonen --- , K Karlsson --- ,The silvicultural information base for the development of management regimes for Tanzanian miombo woodlands is underdeveloped. The limited and fragmented information on tree growth and stand dynamics has constrained the progress of sustainable management in these woodlands. Therefore, this study... -
Using crown characterisation variables as indicators of the vigour, competition and growth of Brazilian pine
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Lorena Oliveira Barbosa --- , Brazil César Augusto Guimarães Finger --- , Brazil Emanuel Arnoni Costa --- , Brazil Otávio Camargo Campoe --- , Brazil Cristine Tagliapietra Schons --- , BrazilCrown variables are used in growth and production models to increase the accuracy of estimates. These variables are costly and difficult to measure, mainly in dense native forests such as mixed ombrophilous forests (MOF), where Araucaria angustifolia is the predominant... -
Evidence-based global yield benchmarks in unthinned industrial plantation eucalypts
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Robert Neil Pallett --- Institute of Commercial Forestry Research, South AfricaThere is increasing global demand for wood and wood products for a growing diversity of applications. Even-aged plantation forests are efficient in providing goods and services from relatively small areas of land. Eucalypt plantations have been an important component of...