As part of a study of the possibility of using the urchin T. gratilla to control the growth of macroscopic algae on shallow reefs in Kaneohe Bay, we examined the growth rate of this urchin. We measured growth of tagged (PIT tagged) urchins at both sites where they were abundant (Sampan Channel site, Reef 13 and Reef 11) and at sites to which we introduced them (Coconut Island reef flat, Reef 22, Reef 29, Reef 19).
Control the growth of macroscopic algae on shallow reefs in Kaneohe Bay.
Unknown Resource Description: NODC Accession # 0001459
ground condition
dataset credit required
Edmonton 456
Hawaii Coral Reef Initiative; Department of Zoology, University of Hawaii
see methodology
none
As part of a study of the possibility of using the urchin T. gratilla to control the growth of macroscopic algae on shallow reefs in Kaneohe Bay, we examined the growth rate of this urchin. We measured growth of tagged (PIT tagged) urchins at both sites where they were abundant (Sampan Channel site, Reef 13 and Reef 11) and at sites to which we introduced them (Coconut Island reef flat, Reef 22, Reef 29, Reef 19). Reef 22 is miss-numbered as Reef 21 on Roy's (1970) map of the reefs of Kaneohe Bay (referenced on file). The incorrect number is used in this data file. Growth was assessed by measuring change in diameter of the test over part of a year. Three diameter measurements were made on each urchin with a pair of steel calipers (tips of plastic calipers rapidly wore down). Error in these measurements occurred because some urchins are asymmetrical and because spines interfered with closure of the caliper jaws.
Original file received was Tripneustesgrowthdata.xls (MS Excel). A redundant ASCII copy in Comma Separated Version (CSV) was dumped. Columns in file self explanatory.
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None
MS Word 97 documents (completed yearly reports and associated files); redundant text files
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