. Bulletin. Natural history; Natural history. 380 Illinois Natural History Survey Bulletin 1 Vol. 33, An. 4. Fig. 108.âTotal distribution of Procambarus viaeviridis. from localities in the Ohio River drain- age in Alexander, Johnson, Massac, Pope, and Pulaski counties. The largest populations are in cypress swamps {especially Heron Pond-Little Black Slough and Bell Pond) in Johnson County. Life History.âOther than brief comments on its affinity for sluggish and standing bodies of water, nothing appears to have been published on the ecological characteristics of P. inaeviri- dis. During the pre
. Bulletin. Natural history; Natural history. 380 Illinois Natural History Survey Bulletin 1 Vol. 33, An. 4. Fig. 108.âTotal distribution of Procambarus viaeviridis. from localities in the Ohio River drain- age in Alexander, Johnson, Massac, Pope, and Pulaski counties. The largest populations are in cypress swamps {especially Heron Pond-Little Black Slough and Bell Pond) in Johnson County. Life History.âOther than brief comments on its affinity for sluggish and standing bodies of water, nothing appears to have been published on the ecological characteristics of P. inaeviri- dis. During the present study, 16 collec- tions of the species were made, all from December through May (Table 9). Fig. 109âDistribution of Procambarus viaeviridis in Illinois: black dots = 1972-1982 collections. During this period, water levels in southern Illinois are generally high, and P. I'iaei'iridis can be found on flooded floodplains, in some roadside ditches, and in swamps. Periodically flooded areas appear to be the preferred habitat of P. I'iacviridis, and when they dry, (he crayfish burrows underground. In April, specimens were dug from bur- rows 15-30 cm deep on the floodplain Table 9.âFrequency of occurrence of form I males, females carrying eggs (ovigerous). and females carrying young, in Illinois collections of Procambarus viaeviridis. â¢v'uni )fl and Pircem of 0)llccli cning Januiiry 1 1 100 0 0 0 0 Fi' «? 0 0 0 0 0 0 . 9 0 0 0 0 0 0 .Vpiil .5 0 0 0 0 0 0 M,i\ .'â ) 2 10 0 0 0 0 Dtcimlui I 0 0 0 0 0 0. 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 Illinois. Natural History Survey Division. Urbana, State of Illinois, Dept. of Registration and Education, Natural History Survey Division
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