||Reproductive Rhythmicity of the Atlantic Silverside.
Middaugh, D. P. ;
Domey, R. G. ;
Scott, G. I. ;
||Environmental Research Lab., Gulf Breeze, FL. ;South Carolina Univ., Columbia.
South Carolina ;
Atlantic silverside ;
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The reproductive periodicity of the Atlantic silverside, Menidia menidia, was studied at two locations on the North Edisto River estuary in South Carolina during March - July of 1976-1978. Spawning runs occurred in the upper intertidal zone and coincided precisely with daytime high tides. Time series analysis of daily changes in the intensity of spawning runs revealed a fortnightly reproductive periodicity. Additional analyses indicated that the observed reproductive rhythmicity in M. menidia may be mediated by a high tide- sunrise cue, that also occurs at fortnightly intervals.