. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. BIOLOGY AND ECOLOGY OF THE GENUS TYLOS LATREILLE 419 t Oil pollution This was noted at the Blouberg population studied, when several observa- tions were made. Crude oil from the ballast tanks of a tanker washed ashore on 7 February 1970. The following day was a spring tide, the result being that the beach was covered with oil from the water line to the HWS mark (Fig. 1 la). At 1 BHP* M* ^^_ ~*"-—' ^^^^_ - - — —^- 1 BB^?^ &- - - ~z: E 5St sJ* i ' Z^:^-:-" w£ iSfiS^^L^ : ** Lap<?i- B ^
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. BIOLOGY AND ECOLOGY OF THE GENUS TYLOS LATREILLE 419 t Oil pollution This was noted at the Blouberg population studied, when several observa- tions were made. Crude oil from the ballast tanks of a tanker washed ashore on 7 February 1970. The following day was a spring tide, the result being that the beach was covered with oil from the water line to the HWS mark (Fig. 1 la). At 1 BHP* M* ^^_ ~*"-—' ^^^^_ - - — —^- 1 BB^?^ &- - - ~z: E 5St sJ* i ' Z^:^-:-" w£ iSfiS^^L^ : ** Lap<?i- B ^n" ""if^S-^ t» . - » _ Hi ^J^^*"- --^r^r • -___ JBJJL: " : ? ^b^ 9. Fig. 11. a. Oil pollution at Blouberg. b. Exit holes through thick oil. the lower levels wave action tended to froth the oil, which was therefore not very thick. Higher up the beach the oil formed a thick solid deposit. Low tide on the night of the 7th was at 2225 hours, when not many animals emerged. Almost all the animals which did emerge were killed, death probably being caused by clogging of the pleopods and a consequent arrest of respiration. About. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original South African Museum. Cape Town : The Museum
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
