. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. UCA REPRODUCTION AND MOLT 635. OVARIAN WEIGHT (MG) FIGURE 2. Frequency distributions by weight classes for crab ovaries: A, open circles, con- trols from February 25 shipment; solid circles, nonovigerous controls from April 15 shipment: B, open circles controls from January 13 shipment; solid circles, ovigerous controls from April 15 shipment; C, destalked from February 25 shipment; open circles 10L:14D; solid circles LL; and D, open circles, destalked from January 13 shipment; solid circles, destalked ovigerous from April 1
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. UCA REPRODUCTION AND MOLT 635. OVARIAN WEIGHT (MG) FIGURE 2. Frequency distributions by weight classes for crab ovaries: A, open circles, con- trols from February 25 shipment; solid circles, nonovigerous controls from April 15 shipment: B, open circles controls from January 13 shipment; solid circles, ovigerous controls from April 15 shipment; C, destalked from February 25 shipment; open circles 10L:14D; solid circles LL; and D, open circles, destalked from January 13 shipment; solid circles, destalked ovigerous from April 15 shipment. with increasing weights, rind no ovaries weighing above 60 nig. This represents a fairly normal J-shaped distribution. The crabs from the January shipment had ovaries in higher weight classes than those attained by ovigers in the April ship- ment. The distributions for crabs observed throughout the autumn are shown in Table II and are essentially like those illustrated in Figure 2B. The clustering in the smallest weight class was slightly more exaggerated in September, October and November, while in December 100% of the ovaries weighed less than 10 mg. Three color classes are readily distinguishable on visual examination of the ovaries: purple, the color of mature ova, orange, infrequently present in control crabs, and colorless, characteristic of immature ovaries. The relative frequencies of occurrence of the three color classes for September through May are seen in Table III. It is apparent that the proportion of colorless ovaries in intact crabs is maximal from September through December. The proportion drops in January when the proportion of purple begins to increase. There follow precipitous drops in the pro- portion of colorless ovaries through March for all crabs and into April for non- ovigers. For those that oviposited in mid-April, the proportion of colorless ovaries abruptly increases. For intact crabs the orange color occurs with maximum fre- quency (22%
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
