The ecology of coral reefs The ecology of coral reefs : results of a Workshop on Coral Reef Ecology held by the American Society of Zoologists, Philadelphia, Pennsylvania, December 1983 ecologyofcoralre00reak Year: 1985 TEMPORAL PATTERNS OF ZOOPLANKTON MIGRATION 600- a: soo > a z * 300 Legend A TOTAL • LESS OITHONA pV/ZAV^iV/^AV^ TIME Figure number of individuals captured per hour during the different time intervals are plotted, both with and without the copepod Oithona colcarva. Samples from 2030 on July 16 have not been counted. Refer to table 1 for the means, medians, and stan
The ecology of coral reefs The ecology of coral reefs : results of a Workshop on Coral Reef Ecology held by the American Society of Zoologists, Philadelphia, Pennsylvania, December 1983 ecologyofcoralre00reak Year: 1985 TEMPORAL PATTERNS OF ZOOPLANKTON MIGRATION 600- a: soo > a z * 300 Legend A TOTAL • LESS OITHONA pV/ZAV^iV/^AV^ TIME Figure number of individuals captured per hour during the different time intervals are plotted, both with and without the copepod Oithona colcarva. Samples from 2030 on July 16 have not been counted. Refer to table 1 for the means, medians, and standard deviations. Note that units of time along the x axis are unequal. results from 148 samples from mesh emergence traps from 2 days (July 16-17) will be presented herein. During the collection period sunrise was at 0600, sunset at 1800, and the lunar phase was new moon. RESULTS Effects of Traps and Substrata No signi (ST) tests] i mesh traps wi no significan hour occurred or rubble. F traps located traps tended between types are from mesh ficant differences [p < ; Mann Whitney U (MWU), Students' T n the number of individuals captured per hour were observed between th sealed vs. unsealed bottoms over coral substrata. Additionally, t differences (p _< ) in the number of individuals captured per between traps positioned over sand vs. those positioned over coral or all subsequent tests, data from sealed and unsealed traps and over sand and over coral or rubble were pooled. The polyvinyl to capture more zooplankton than mesh traps. Although the difference of trap was not significant, most of the data presented herein traps only. 120
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