. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 194 J. E. HOSE ET 30 25 6 t 20 e m e 10 1 1 DO Dl-2 D3-4 Al A2 B C Holt Stage Figure 5. Mitolic index of hyaline cells (% of cells in mitosis) (A) and numbers of hyaline stem cells (•) in the hematopoietic tissue of shrimp throughout the molt cycle. Mean of five shrimp, four tubules/ shnmp. Error bars are +1 standard deviation. The number of hyaline stem cells was significantly higher only during molt stage A,. different times during the molt cycle. Granulocytes ap- peared to be released soon after production during int
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 194 J. E. HOSE ET 30 25 6 t 20 e m e 10 1 1 DO Dl-2 D3-4 Al A2 B C Holt Stage Figure 5. Mitolic index of hyaline cells (% of cells in mitosis) (A) and numbers of hyaline stem cells (•) in the hematopoietic tissue of shrimp throughout the molt cycle. Mean of five shrimp, four tubules/ shnmp. Error bars are +1 standard deviation. The number of hyaline stem cells was significantly higher only during molt stage A,. different times during the molt cycle. Granulocytes ap- peared to be released soon after production during inter- molt and early D stages (Fig. 4). However, a second, smaller pulse of granulocyte production occurred during stage A: with some of the cells apparently released during this stage and the rest accumulated in the tubules during stage B and released during stage C. Characteristics of the released cells supported these inferences. Sizes of released granulocytes during stages D0_: were large (Table I) and they more closely resembled small granule stem cells ( fewer granules and a higher N:C ratio than most circu- lating small granule hemocytes), suggesting that they were indeed released soon after production. Similarly, small granule cells released during stage A were larger and more immature compared to those released during B and C, which were smaller and contained more granules. Production of hyaline hemocytes peaked during the ecdysial period (stage D3_4 through A). Hyaline cells ap- peared to be released soon after their production during stages C through D,_:. Many of these cells appeared to be maturing hyaline stem cells since their size approxi- mated that of the stem cells (Table I), the N:C ratio was lower than that of circulating hyaline hemocytes, and the cytoplasm was frequently agranular. During stages D,_4 and A,, however, the size of released cells significantly declined, and they appeared more like circulating hyaline hemocytes with heavily condensed chro
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
