Publication Date:
2022-05-25
Description:
Presented in this report are the reduced oceanographic, chemical, and
biological data, station lists of plankton and benthic collections, and
bathythermograph positions for Cruises 7 and 8 of the R/V ANTON BRUUN; and
the station lists of reef and inshore, plankton, benthic, and miscellaneous
biological collections, and bathythermograph positions for Cruise 9.
Narrative reports of Cruises 7 and 8 were issued as News Bulletins No. 9
(Jan. 1965) and No. 10 (Feb. 1965), respectively, by the U. S. Program in Biology, IIOE.
Cruises 7 and 8 were devoted primarily to benthic biology. On Cruise
7, which concentrated on the area east of South Africa and south of
Madagascar (Fig.1), collections of the bottom fauna were made with a
variety of gear including Campbell and Van Veen grabs, Phleger and trigger
corers, Menzies and Agassiz trawls, rock dredges, and Dietz-Lafond snappers.
On Cruise 8 collections were made in the Mozambique Channel and adjacent
continental shelves (Fig. 2) mainly with a 40 ft. Gulf of Mexico type shrimp
trawl, Menzies trawl, and Ockelman dredge.
Cruise 9 emphasized reef and shore collecting in some of the more remote
island areas in the southwestern Indian Ocean (Fig. 3). Specimens were
obtained by SCUBA and free diving, rotenone poisoning, and collecting in the
exposed intertidal zones of the reef and shore areas of Mombasa, Kenya
(Fig. 4); Latham Island south of Zanzibar; Grand Comore and Mayotta Islands
(Figs. 5 and 6); Aldabra and Farquhar Islands (Figs. 7 and 8); St. Joseph's
and D'Arros Islands in the Amirante Isles (Fig. 9); and Mahe and Cerf Islands
in the Seychelles (Fig.10) . Although general collections were made at all
these areas, certain groups received special attention because of specific
interests among the scientific party. These included macroscopic algae, seagrasses,
mollusks, commensal and parasitic copepods, parasitic helminths,
nemerteans, ostracods, lancelets, pontoniid shrimps, fishes and Ascothoracida,
a parasitic group of barnacles found in the certain cavities of zoantharians
and echinoderms.
At most of the island stations, longline gear and a 200 ft. shark gill
net were fished. Bottom trawling with a Gulf of Mexico shrimp trawl was
impractical because of the many pinnacles and dome-shaped formations around
the various islands. Towards the end of Cruise 9, a series of trawl hauls
was made on the narrow continental shelf along the Somali coast.
Most of the Cruise 9 scientific party left the ship at Aden on December
20. The remaining members made a series of plankton collections in the Red
Sea, and disembarked at Rurghada, U.A.R. to make shore collections
Keywords:
International Indian Ocean Expedition (1960-1965)
Repository Name:
Woods Hole Open Access Server
Type:
Working Paper
Format:
application/pdf
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