Free Content Effects of Lunar Periodicity on The Emergence Behavior of the Demersal Copepod Pseudodiaptomus Cokeri In Phosphorescent Bay, Puerto Rico

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Abstract:

This study examined the emergence behavior of Pseudodiaptomus cokeri, a demersal copepod species found in Phosphorescent Bay, Puerto Rico. Surface plankton net tows, sledge-net tows, emergence traps and hand-net tows were used to examine day/night variations in vertical distribution associated with substratum type and lunar periodicity. Greater emergence of adult and copepodite instars of P. cokeri predominately occurred at full moon (one-way ANOVA, Fisher's PLSD, P < 0.05). Copepodites of P. cokeri emerge in greater numbers to the surface than adults during moonlit nights, which suggests that the degree of vertical migration becomes less pronounced with age (one-way ANOVA, P < 0.05). This copepod was more common in samples from seagrass and sand + macroalgae, the two most structurally complex substrata (one-way ANOVA, Fisher's PLSD, P < 0,05), indicating that substratum heterogeneity enhances densities of animals on the bottom.

Document Type: Research Article

Publication date: November 1, 2000

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  • The Bulletin of Marine Science is dedicated to the dissemination of high quality research from the world's oceans. All aspects of marine science are treated by the Bulletin of Marine Science, including papers in marine biology, biological oceanography, fisheries, marine affairs, applied marine physics, marine geology and geophysics, marine and atmospheric chemistry, and meteorology and physical oceanography.
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