scholarly journals The population dynamics and life-history attributes of a Pterocarpus angolensis DC. population in the Northern Province, South Africa

1996 ◽  
Vol 62 (3) ◽  
pp. 160-166 ◽  
Author(s):  
P.G. Desmet ◽  
C.M. Shackleton ◽  
E.R. Robinson
Keyword(s):  
South Africa ◽  
Population Dynamics ◽  
Life History ◽  
Northern Province ◽  
Pterocarpus Angolensis

scholarly journals Identifying ecological and life-history drivers of population dynamics of wetland birds in South Africa

2017 ◽  
Vol 12 ◽  
pp. 96-107 ◽  
Author(s):  
Yahkat Barshep ◽  
Birgit Erni ◽  
Les G. Underhill ◽  
Res Altwegg
Keyword(s):  
South Africa ◽  
Population Dynamics ◽  
Life History ◽  
Wetland Birds

Improvement of environmental health and hygiene practices - case study in the Northern Province

2001 ◽  
Vol 44 (6) ◽  
pp. 109-117 ◽  
Author(s):  
M. A. Mathegana ◽  
L. K. Chauke ◽  
F. A.O. Otieno
Keyword(s):  
South Africa ◽  
Environmental Health ◽  
Northern Province ◽  
Active Involvement ◽  
Sustainable Improvement ◽  
Hygiene Practices ◽  
Proper Training ◽  
The Government ◽  
Better Than

The primary purpose of an improved water supply and sanitation is the achievement of acceptable health and hygiene standards as well as the sustainable improvement of the environment. Many governments recognize this and so they budget for large sums of money to improve these services to the communities. The purpose of this study was to investigate the different gaps in environmental health and hygiene practices with the aim of suggesting a strategy of improving this in the Northern Province of South Africa. To do this, 231 households and 30 schools were surveyed. Workshops and visits to different government departments were also used. This paper reports the results from this study which indicate that the situation in schools was not any better than that in households, with more than 90% of the villages still dependent on the unimproved pit latrines and 56,6% relying on standpipes which were (70% of the time) non-operational. The main problems identified seem to those associated with implementation and maintenance. The study concludes that with proper training of the water committees and their active involvement with the government and NGOs, environmental health and hygiene problems can be minimized or eliminated.

The Collection Of the Cactus Weevil, Cactophagus spinolae (Gylh.), in Mexico and its Dispatch to South Africa

1952 ◽  
Vol 43 (1) ◽  
pp. 43-50 ◽  
Author(s):  
Wendell F. Sellers
Keyword(s):  
South Africa ◽  
Biological Control ◽  
Life History ◽  
Food Preferences ◽  
Prickly Pear ◽  
Made In

Collections of Cactophagus spinolae (Gylh.) were made in Mexico in 1946, 1947, and 1948 to supplement the biological control of prickly pear (Opuntia spp.) in South Africa. During these three years, 862, 1,396, and 15,584 adults, respectively, were dispatched to South Africa. The weevils were sent by air express in specially designed containers, and arrived in excellent condition.This paper includes information on the distribution, life history and food preferences of C. spinolae. The need is stressed for anticipating the effects of transit conditions upon living insect material transported by aircraft.

Population dynamics of Stenothoe valida Dana, 1852 (Amphipoda, Stenothoidae) at Cheongsapo beach of Busan, Republic of Korea

Crustaceana ◽  
2021 ◽  
Vol 94 (4) ◽  
pp. 413-429
Author(s):  
Ye Ji Lee ◽  
Won Gyu Park
Keyword(s):  
Population Dynamics ◽  
Life History ◽  
Sex Ratio ◽  
Brood Size ◽  
Ovigerous Female ◽  
Seasonal Pattern ◽  
Recruitment Rate ◽  
Republic Of Korea ◽  
Female Size ◽  
History Of

Abstract The population dynamics of Stenothoe valida Dana, 1852 were studied at Cheongsapo beach of Busan, Republic of Korea, from March 2019 to March 2020. Sampling was conducted once a month at low tide during spring tides. Specimens were grouped by the cephalic length at 0.025 mm intervals, and classified into four categories: females, ovigerous females, males and juveniles. The sex ratio, defined as females : total males + females, exceeded 0.5 during most of the study period. Brood size was significantly coupled with ovigerous female size. Two to four cohorts appeared at each study period. New cohorts occurred at almost every sampling except in the samples Jun-2, and Nov-2. Life span was estimated at 1-2 months. The juvenile ratio, the ratio of ovigerous females, and the recruitment rate estimated by FiSAT were commonly high in summer and winter. The life history of S. valida was not coupled with water temperature, but had a strong seasonal pattern.

scholarly journals Factors affecting behaviours that address HIV risk among a sample of junior secondary school students in the Northern Province, South Africa

2002 ◽  
Vol 7 (3) ◽  
Author(s):  
Karl Peltzer
Keyword(s):  
South Africa ◽  
Secondary School ◽  
Hiv Risk ◽  
Full Text ◽  
Secondary School Students ◽  
Northern Province ◽  
School Students ◽  
Factors Affecting ◽  
Junior Secondary School ◽  
Junior Secondary

The purpose of this study was to identify factors affecting HIV risk reduction among junior secondary school pupils in South Africa. Opsomming Die doel van hierdie studie was om HIV risiko reduksie faktore onder junior sekondêre skool leerlinge in Suid-Afrika te identifiseer. *Please note: This is a reduced version of the abstract. Please refer to PDF for full text.

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