The Correlation Between the Isotope Distribution and Geochemistry of Mafic to Intermediate Igneous Rocks from the South African West Coast

1994 ◽  
Vol 58A (1) ◽  
pp. 456-457
Author(s):  
L. J. Jordaan
Keyword(s):  
South African ◽  
West Coast ◽  
Igneous Rocks ◽  
The South ◽  
Isotope Distribution

Improving the catch efficiency of the West Coast rock lobster, Jasus lalandii

2000 ◽  
Vol 51 (6) ◽  
pp. 613 ◽  
Author(s):  
D. Loewenthal ◽  
S. Mayfield ◽  
G. M. Branch
Keyword(s):  
Weight Loss ◽  
South African ◽  
West Coast ◽  
Capture Rate ◽  
Catch Rate ◽  
Rock Lobster ◽  
The South ◽  
The West ◽  
The Relationship

The South African commercial rock-lobster industry employs an average soak time of 22 h for traps. Experiments were undertaken to test (1) the rate of bait loss with soak time and the effect that protection of the bait has on bait loss, (2) the relationship between catch rate (numbers per trap) and soak time for traps with either protected or unprotected bait, and (3) the effect of two bait types (whole maasbanker and hake heads) on the catch of rock lobsters. There were substantial losses of unprotected bait within 6 h; substantially less weight loss was observed from protected bait even after a 48-h soak time. The numbers of rock lobsters caught in traps with unprotected bait were low relative to the capture rate with protected bait. The highest capture rate occurred after 6 h for unprotected bait and 6–12 h for protected bait. There was no significant effect of bait type (maasbanker v. hake heads) on the number or size of rock lobsters. To optimize catch efficiency, the commercial industry should use protected bait and soak times as short as 6–12 h.

The South African Fisheries: A Preliminary Survey of Historical Sources

2001 ◽  
pp. 167-180
Author(s):  
Lance van Sittert
Keyword(s):  
South African ◽  
West Coast ◽  
Marine Resources ◽  
Historical Records ◽  
Preliminary Survey ◽  
Rock Lobster ◽  
The South ◽  
Historical Sources ◽  
The West

Lance van Sittert explores the historical records concerning the exploitation of marine resources along the West Coast of Africa, using them to provide evidence of the commerical importance of the West Coast over the East or South. The date demonstrates a boom-bust cycle along the West Coast, pertaining to whales, snoek, guano, rock lobster, hake, and pilchard.

Seaweeds of the South African West Coast

Phycologia ◽  
1998 ◽  
Vol 37 (5) ◽  
pp. 402-403 ◽  
Author(s):  
Alan J. K. Millar
Keyword(s):  
South African ◽  
West Coast ◽  
The South

Determination of moult stage in the South African West Coast rock lobsterJasus lalandii(h. Milne Edwards) (Crustacea: Decapoda)

2000 ◽  
Vol 22 (1) ◽  
pp. 177-183 ◽  
Author(s):  
G. Isaacs ◽  
A. C. Cockcroft ◽  
M. J. Gibbons ◽  
C. J. de Villiers
Keyword(s):  
South African ◽  
West Coast ◽  
The South ◽  
Moult Stage
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