. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 240 CHARLES M. WEISS TABLE I Time for development through nauplii. stages to cyprid Barnacle species Number of nauplii stages Time for development to cyprid Balanus crenatus Bruguiere l 6 7-10 days Balanus crenatus Bruguiere 2 8 13-14 days Balanus eburneus z 6 7-10 days Balanus perforatus Bruguiere 4 6 21 davs Chthamalus stellatus 5 6 18-20 days Verruca- sir oemia B 6 23-27 days Balanus balanoides 5 6 3—3^ weeks 1 Bohart (1929). 2Herz (1933). 'Grave (1933). 4Lochhead (1936). 5 Bassindale (1936). in cyprid numbers in the spri
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 240 CHARLES M. WEISS TABLE I Time for development through nauplii. stages to cyprid Barnacle species Number of nauplii stages Time for development to cyprid Balanus crenatus Bruguiere l 6 7-10 days Balanus crenatus Bruguiere 2 8 13-14 days Balanus eburneus z 6 7-10 days Balanus perforatus Bruguiere 4 6 21 davs Chthamalus stellatus 5 6 18-20 days Verruca- sir oemia B 6 23-27 days Balanus balanoides 5 6 3—3^ weeks 1 Bohart (1929). 2Herz (1933). 'Grave (1933). 4Lochhead (1936). 5 Bassindale (1936). in cyprid numbers in the spring and autumn occurred between the periods of mini- mum and maximum temperatures. This relationship suggested that Balanus improvisiis breeds in a temperature range of approximately 18° C. to 27° C. The temperature above which breeding diminished greatly or ceased was more clearly defined than the minimum temperature limit. The waters of Biscayne Bay ex- ceeded the upper temperature breeding limit for several months each year, but rarely and only for short periods did the temperature drop below the lower breeding MAR APR MAT JUN JUL AUG SEP OC T NOV OCC JAN MAR APH MAT JUN JUL AUC SEP OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC JAN FEB MAR APfi MAT JUN 1943 1944 1945 1946 FIGURE 4. The monthly totals of daily cyprid settling and the monthly barnacle attachments on glass surfaces (500 sq. cm.), upper half. The ratio of barnacles to cyprids attached in each monthly period, lower 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 Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. :
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