. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. \- o h- 40 30- 20- Pseudobradya pukhdla. 5 10 15 20 25 30 35 DAYS TO ACTIVE N -N, i o FIGURE 2. Summary data of the appearance of active stage 1-3 nauplii with time in two species of harpacticoid copepods in "controlled" cultures. 17-21 eggs (this particular individual had 20) and 19 nauplii which appeared at stage 1-3 during the 6-week period were accounted for. The histograms, Figures 1 and 2, also illustrate that N:-X3 nauplii continued to appear in the cultures up to 50 days after the hatch. The greatest number
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. \- o h- 40 30- 20- Pseudobradya pukhdla. 5 10 15 20 25 30 35 DAYS TO ACTIVE N -N, i o FIGURE 2. Summary data of the appearance of active stage 1-3 nauplii with time in two species of harpacticoid copepods in "controlled" cultures. 17-21 eggs (this particular individual had 20) and 19 nauplii which appeared at stage 1-3 during the 6-week period were accounted for. The histograms, Figures 1 and 2, also illustrate that N:-X3 nauplii continued to appear in the cultures up to 50 days after the hatch. The greatest number of Ni-Ns nauplii in all four species occtirred in the first 1-5 days with an irregular decline in numbers subsequently. The histograms for three of the four species (Thonipsonitla, Figure 1, excepted) show secondary Ni-N3 peaks at irregular in- tervals. Whether these secondary peaks are real or merely a function of small sample size is unknown. Nevertheless, the point is still made that there is obviously a prolongation of the Nr-N3 stages in these four benthic harpacticoids. We have been relatively successful in culturing Paronychocamptus sp., which accounts for more data on this species. Naupliar growth is 38 (20 "non-controlled", 18 "con- trolled" ) cultures illustrates that the delayed naupliar development is a regular oc- currence in this species. In fact, in every Paronychocamptus culture that was suc- cessfullv maintained, delayed development occurred. We d" not have data on as many single cultures of the other three species for two reasons: 1) successful rear- ing of M. littoralc, and T. hyacnae was erratic, and 2) many of the earlier cultures. 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 Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woo
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
