. The Biological bulletin. Biology; Zoology; Marine biology. PREDATION BY ESTUARINE SHRIMPS 361 N. mercedis biomass was equaled or exceeded by tbe sum of C. franciscorum plus P. macrodactylits biomass. Each species peaked in biomass at different times (Fig. 1). The biomass of N. mercedis was greatest in the May evaluation. C. franciscorum was most abundant in the May through September diel samplings, while P. macrodactylus biomass steadily climbed to a maximum in the late September diel cycle. Foregut contents of C. franciscorum and /'. macrodactylus indicate that those two species are mainly
. The Biological bulletin. Biology; Zoology; Marine biology. PREDATION BY ESTUARINE SHRIMPS 361 N. mercedis biomass was equaled or exceeded by tbe sum of C. franciscorum plus P. macrodactylits biomass. Each species peaked in biomass at different times (Fig. 1). The biomass of N. mercedis was greatest in the May evaluation. C. franciscorum was most abundant in the May through September diel samplings, while P. macrodactylus biomass steadily climbed to a maximum in the late September diel cycle. Foregut contents of C. franciscorum and /'. macrodactylus indicate that those two species are mainly predacious. Tbe frequency of occurrence of animals or animal fragments (A) always exceeded that of plant fragments (P) by at least Crangon franciscorum Palaemon macrodactylu ,. ,19 M] * = ELECHVl . * * . â - - V- 1 - " ... ^nrwK ... tffifiL. Trrrnr TlT^- Neomysis mercedis lenglh (mm) Figure 3. Size electivity (E) of Crangon franciscorum and Palaemon macrodactylus for specimens of Neomysis mercedis during diel cycles in 1976, and the relative abundance (%) of the total N. mercedis population in each length 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 Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-; Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report; HighWire Press. Lancaster, Pa. [etc. ] : Lancaster Press, inc. [etc. ]
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