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Seed development and maturation in edible dry bean (Phaseolus vulgaris L.) cv. Teebus
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: H.A van de Venter --- Department of Botany, Republic of South Africa I. Demir --- Department of Botany, Republic of South Africa S. de Meillon --- Department of Botany, Republic of South Africa W.A. Loubser --- National Department of Agriculture, Republic of South AfricaA study of seed development and maturation in edible dry bean cv. Teebus was conducted on field-grown plants. Mass maturity (maximum seed dry mass) occured 43 days after flowering (DAF) when seed moisture content was 52%. Harvest maturity (at a... -
Aspects of the population biology of Octopus vulgaris in False Bay, South Africa
Item type: Journal Article • Journal: South African Journal of Marine Science • Authors: C. D. Smith C. L. GriffithsThe population biology of the octopus Octopus vulgaris was studied from specimens collected by SCUBA in False Bay, South Africa, between 1997 and 1998. In all, 83% of the specimens collected were found in shelter. Small octopuses were more active... -
The effects of ontogenetic maturation in Pinus patula – Part II: Hedge cycling and field performance
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: R. G. Mitchell N. B. JonesEarly studies suggest that the juvenile period, during which favourable rooting can be achieved from Pinus patula seedling hedges, may be as short as 2 years from the date of sowing. If the effects of hedge maturation cannot be delayed,... -
Clonal propagation and storage of subtropical pines in Queensland, Australia
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: S.J. TruemanClonal forestry is the approach used for deployment of Pinus elliottii × P. caribaea hybrids in Queensland, Australia. Clonal forestry relies on the ability to maintain juvenility of stock plants while selections are made in field tests, so that genetic... -
Access to Sexuality Information by Zimbabwean School Teenagers
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Martin Musengi --- University of the Witwatersrand, South Africa Almon Shumba --- Central University of Technology, South AfricaThis study reports on the findings on access to sexuality information by Zimbabwean school teenagers from a region with cultural rites of passage to adulthood. Participants were a convenience sample of 100 Shangaan speaking high school students (females = 50%)... -
Proportional growth and maturation in Penaeus indicus
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: HFB ChampionA least squares estimation of inflected linear regression is used to interpret the relationships between carapace length (CL) and total length, abdominal length and abdominal width respectively, in Penaeus indicus and Metapenaeus monoceros. In both species well-defined inflection points with... -
Histological assessment of gonad maturation in Labeo parvus (Teleostei: Cyprinidae) in Benin
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: E Montchowui --- Ecole Nationale Supérieure des Sciences et Techniques Agronomiques de Kétou, République du Bénin P Compère --- Functional and Evolutive Morphology Laboratory, Belgium M Thiry --- Laboratory of Cell and Tissue Biology, Belgium P Lalèyè --- Laboratory of Hydrobiology and Aquaculture, Faculty of Agricultural Sciences, Republic of Benin J-C Philippart --- Behavioural Biology Unit, Belgium P Poncin --- Behavioural Biology Unit, BelgiumA histological analysis was undertaken on the gonad development of Labeo parvus Boulenger 1902, a medium-sized cyprinid from the Ouémé River, Benin. Samples were collected monthly between April 2006 and March 2007 and were examined using routine macroscopic and histological... -
Reproductive biology of Bagrus docmak in the Victoria Nile, Uganda
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: C Aruho --- National Fisheries Resources Research Institute, Uganda RK Basiita --- National Fisheries Resources Research Institute, Uganda D Kahwa --- Department of Wildlife and Animal Resources Management, Uganda G Bwanika --- Department of Zoology, Uganda J Rutaisire --- National Fisheries Resources Research Institute, UgandaAspects of the reproductive biology of Bagrus docmak in the Victoria Nile were investigated between November 2005 and October 2006. Macroscopic and histological analysis of the gonads confirmed it as an asynchronous batch spawner which spawns throughout the year with... -
Population Dynamics and Spawning of the Flatfish Solea Bleekeri and Pseudorhombus Arsius in the Intertidal Area of Inhaca Island, Moçambique
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A. M. P. Van Schie W. F. De BoerThe population dynamics of flatfish Solea bleekeri and Pseudorhombus arsius within the intertidal area of Inhaca Island, Moçambique, was investigated using bottom trawl data collected during summer (December 1996 – March 1997) and winter (June 1997 – August 1997). The... -
A review on the effects of donor maturation on rooting and field performance of conifer cuttings
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: R.G Mitchell --- Sappi Forests Research, J. Zwolinski --- Forestry Programme, N.B. Jones --- Sappi Forests Research,The maturation and ageing effects of parent or donor plants have been reported to have both positive and negative influences on the performance of rooted cuttings. A general decline in rooting ability, root quality and speed of rooting in the... -
The effects of ontogenetic maturation in Pinus patula - Part 1: nursery performance
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: R. G. Mitchell --- Sappi Forests Research, Africa J. Zwolinski --- Forestry Programme, Africa N. B. Jones --- Sappi Forests Research, AfricaThe age at which parent or donor hedges reach ontogenetic maturity has frequently been cited as a debilitating factor in the production of conifer cuttings. This point varies between species and prevailing environmental conditions. Among other things, a lack of... -
Reproduction in the viviparous South African clinid fish Fucomimus mus
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: HG MoserDescription of the reproductive anatomy, histology and seasonality of reproduction of the viviparous clinid fish, Fucomimus mus, was based on a collection of 227 specimens from various intertidal localities off the south-east coast of South Africa. Males produce sperm throughout... -
When do yearling male Black-bellied Sandgrouse Pterocles orientalis reach sexual maturation?
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Mohamed Aourir --- Department of Biology, Faculty of Sciences, Morocco Mohammed Znari --- Laboratory ‘Biodiversité et Dynamique des Ecosystèmes’, Department of Biology, Faculty of Sciences, Morocco Mohamed Radi --- Laboratory ‘Biodiversité et Dynamique des Ecosystèmes’, Department of Biology, Faculty of Sciences, MoroccoIn the present study, a histological and morphometric investigation of testes in yearling male Black-bellied Sandgrouse Pterocles orientalis was performed during the reproductive period. The trial was conducted on four randomly selected yearling male birds that originated from eggs collected... -
Radial variation of wood properties in Neolamarckia cadamba trees from an East Java community forest
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Yus Andhini Bhekti Pertiwi --- Faculty of Agriculture, Japan Haruna Aiso --- Faculty of Agriculture, Japan Futoshi Ishiguri --- Faculty of Agriculture, Japan Sri Nugroho Marsoem --- Faculty of Forestry, Indonesia Shinso Yokota --- Faculty of Agriculture, JapanRadial variations in wood properties, cell morphologies and cell proportions were investigated for nine 4-year-old Neolamarckia cadamba trees planted in a community forest in East Java, Indonesia. The relationships between stem diameter and wood properties, cell morphologies or cell proportions... -
Reproductive biology of the blue swimming crab Portunus segnis (Forskål, 1775) (Brachyura: Portunidae) in the Gulf of Gabes (southeastern Tunisia, central Mediterranean Sea)
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: O Ben Abdallah-Ben Hadj Hamida --- , Tunisia N Ben Hadj Hamida --- , Tunisia H Chaouch --- , Tunisia B Nafkha --- , Tunisia N Ben Ali --- , Tunisia D Abidi --- , Tunisia H Missaoui --- , TunisiaThe blue swimming crab Portunus segnis (Forskål, 1775) (family Portunidae) is one of the earliest Lessepsian invaders of the Mediterranean Sea and has been recorded for several decades in various Mediterranean areas. However, its presence on the southeastern Tunisian coast... -
Life-history traits of the false jacopever Sebastes capensis (Scorpaenidae: Sebastinae) in South African waters
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: T Mohamed --- Department of Biological Sciences, University of Cape Town, South Africa CG Attwood --- Department of Biological Sciences, University of Cape Town, South AfricaThe genus Sebastes (rockfishes) of family Scorpaenidae (scorpionfishes) contains over 110 species, of which the false jacopever Sebastes capensis is the only one found in South African waters. Although it is a commonly caught linefish along the west coast of...