. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 514 I. KEVIN FOSKETT Ai°c -. s 1 o 3 0 4 0 1 0 2 0 3 0 4 0 FIGURE 3. Osmotic concentration of the blood as a function of the osmotic concentration of the medium for zoeae sampled immediately following first ecdysis (S2A), mid-way through stage II (S2C) and immediately before second ecdysis (S2D) ; smaller points represent one individual, larger points represent identical responses by two individuals. Regression lines are derived from combined data of both hatches except for S2C larvae, where circles represent respons
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 514 I. KEVIN FOSKETT Ai°c -. s 1 o 3 0 4 0 1 0 2 0 3 0 4 0 FIGURE 3. Osmotic concentration of the blood as a function of the osmotic concentration of the medium for zoeae sampled immediately following first ecdysis (S2A), mid-way through stage II (S2C) and immediately before second ecdysis (S2D) ; smaller points represent one individual, larger points represent identical responses by two individuals. Regression lines are derived from combined data of both hatches except for S2C larvae, where circles represent responses of HI larvae. Mid-stage II larvae of hatch 2 also differ significantly (P < ) from the post-molt stage II larval response. However, no differences could be detected be- tween the responses of post-molt stage II larvae and mid-stage II larvae of hatch I. Hatch 2 larvae mid-way through stage II display a greater degree of hyper- osmoticity than post-molt stage II larvae up to Ae° C - The Mann-Whitney test indicates a significant difference only at IQ'/lc (P - ) suggesting, again, that the observed difference in the lines is largely due to differences in the response at 10/{o. The slope of the regression line representing the response of the mid- stage II larvae is significantly less (P C ) than that of the post-molt larvae, indicating a greater degree of osmotic regulation by the former. The response exhibited by premolt stage II larvae is barely significantly different (P < ) from that displayed by mid-stage II larvae of hatch 2, although the Mann-Whitney test could detect no differences between the responses of these two groups in hatch 2 at any salinity. The mid-stage II larvae are more hyper-osmotic up to Ae° C : and display a smaller slope (P C ), indicating a slightly greater degree of osmotic regulation. Premolt stage II and post-molt megalops larvae differ in their osmotic responses C ), premolt stage II larvae displaying g
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
