Harvesting of the kelp Ecklonia maxima in South Africa affects its three obligate, red algal epiphytes

2008 ◽  
pp. 117-123 ◽  
Author(s):  
R. J. Anderson ◽  
M. D. Rothman ◽  
A. Share ◽  
H. Drummond
Keyword(s):  
South Africa ◽  
Ecklonia Maxima ◽  
Red Algal

Harvesting of the Kelp Ecklonia Maxima in South Africa Affects Its Three Obligate, Red Algal Epiphytes

2006 ◽  
Vol 18 (3-5) ◽  
pp. 343-349 ◽  
Author(s):  
R. J. Anderson ◽  
M. D. Rothman ◽  
A. Share ◽  
H. Drummond
Keyword(s):  
South Africa ◽  
Ecklonia Maxima ◽  
Red Algal

A new species of Sunamphitoe (Amphipoda: Ampithoidae) that bores into the primary fronds of kelps in South Africa

2019 ◽  
Vol 39 (4) ◽  
pp. 436-439 ◽  
Author(s):  
Charles L Griffiths
Keyword(s):  
South Africa ◽  
New Species ◽  
Ecklonia Maxima ◽  
Kelp Beds ◽  
Small Family ◽  
Drill Bits ◽  
A New Species ◽  
Family Groups

Abstract The herbivorous amphipod Sunamphitoe robertan. sp. is described from the canopy of kelp beds in False Bay, South Africa. The new species has unusual habits, small family groups burrowing directly into the margins of the swollen primary fronds of the kelp Ecklonia maxima (Osbeck) Papenfuss, 1940. Morphologically, the new species is best distinguished from other species of Sunamphitoe by strong rows of dorsal spines on the outer rami of uropods 1 and 2. These spine rows appear to be employed as ‘drill-bits’ to excavate kelp tissue and create the burrows. Damage to hosts does not appear to be fatal, but requires further investigation.

Trends in seaweed resource use and aquaculture in South Africa and Namibia over the last 30 years

2020 ◽  
Vol 63 (4) ◽  
pp. 315-325
Author(s):  
Mark D. Rothman ◽  
Robert J. Anderson ◽  
Lineekela Kandjengo ◽  
John J. Bolton
Keyword(s):  
South Africa ◽  
Plant Growth ◽  
Southern Africa ◽  
Resource Use ◽  
Ecklonia Maxima ◽  
Start Up ◽  
Agar Production ◽  
Alginate Extraction ◽  
Seaweed Industry ◽  
Aquaculture Production

AbstractThe seaweed industry of temperate Southern Africa was last reviewed in 2003. Since then there have been considerable changes. There are three main uses of kelp (mostly Ecklonia maxima, with some Laminaria pallida) in South Africa. The collection of wash-up for drying and exporting for alginate extraction has drastically reduced to very small amounts in recent years. The boat harvest of fresh kelp for abalone feed in land-based farms has reached a plateau of between 4000 and 5000 t fresh per annum. The diver harvest of E. maxima for agricultural liquid plant growth enhancer shows a constant increase over several years, is still growing, and is currently over 3000 t fresh per annum. The small intertidal collection of Gelidium pristoides as export for agar production has maintained a small, sustainable production of around 100 t dry for many years. Former Gracilaria industries in sheltered bays in both South Africa and Namibia have collapsed, and there is currently no commercial collection. There was commercial raft aquaculture production of Gracilaria in Lüderitz Bay, Namibia for a number of years, but this is no longer practised. Currently, the only commercial seaweed use in Namibia is of L. pallida. Annually, ca. 150 t of fresh wash-up is collected, in Lüderitz, to be used as feed in land-based abalone aquaculture. There are a number of small start-up companies experimenting with seaweed products for cosmetics and nutritional products in both countries, some involving species of Ulva and Porphyra. The former species is a major aquaculture product, with around 2000 t fresh yr–1 being produced in integrated land-based systems with abalone.

Hydrolithon pellire sp. nov., a mastophoroid crustose coralline red algal epiphyte from South Africa

Phycologia ◽  
1994 ◽  
Vol 33 (4) ◽  
pp. 291-297 ◽  
Author(s):  
Y. M. Chamberlain ◽  
R. E. Norris
Keyword(s):  
South Africa ◽  
Red Algal

Time and Latitude in South Africa

1972 ◽  
Vol 1 ◽  
pp. 27-38
Author(s):  
J. Hers
Keyword(s):  
South Africa ◽  
Cape Town ◽  
Astronomical Observations ◽  
Royal Observatory ◽  
The Republic ◽  
Astronomical Determination ◽  
Limited Accuracy ◽  
Better Than

In South Africa the modern outlook towards time may be said to have started in 1948. Both the two major observatories, The Royal Observatory in Cape Town and the Union Observatory (now known as the Republic Observatory) in Johannesburg had, of course, been involved in the astronomical determination of time almost from their inception, and the Johannesburg Observatory has been responsible for the official time of South Africa since 1908. However the pendulum clocks then in use could not be relied on to provide an accuracy better than about 1/10 second, which was of the same order as that of the astronomical observations. It is doubtful if much use was made of even this limited accuracy outside the two observatories, and although there may – occasionally have been a demand for more accurate time, it was certainly not voiced.

Indirect Rule in South Africa

2009 ◽  
Author(s):  
J. C. Myers
Keyword(s):  
South Africa ◽  
Indirect Rule

Combining Professional Interests and Travel: People to People Citizen Ambassador Program

2011 ◽  
Vol 1 (2) ◽  
pp. 47-54
Author(s):  
Alex Johnson ◽  
Amanda Hitchins
Keyword(s):  
South Africa ◽  
Health Education ◽  
Communication Disorders ◽  
Social Conditions ◽  
Speech Language Pathologists ◽  
Exchange Program

Abstract This article summarizes a series of trips sponsored by People to People, a professional exchange program. The trips described in this report were led by the first author of this article and include trips to South Africa, Russia, Vietnam and Cambodia, and Israel. Each of these trips included delegations of 25 to 50 speech-language pathologists and audiologists who participated in professional visits to learn of the health, education, and social conditions in each country. Additionally, opportunities to meet with communication disorders professionals, students, and persons with speech, language, or hearing disabilities were included. People to People, partnered with the American Speech-Language-Hearing Association (ASHA), provides a meaningful and interesting way to learn and travel with colleagues.

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