. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 214 P. T. RAIMONDI Table la Morphological characters used in the muhivariate analysis of variance (MANOVA; explanation for the two tests is found in the text). See Figure 1 1) The width of the tergal spur (sw)/the length of the basal margin (bm). 2) The distance from the basiscutal angle to the margin of the spur (aw)/the length of the tergal spur (si). 3) sl/sw. 4) aw/sw. 5) aw/bm. 6) sl/bm. jim section in the middle of each cyprid. Light intensity was standardized prior to each measurement. Cyprid length was measured with
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 214 P. T. RAIMONDI Table la Morphological characters used in the muhivariate analysis of variance (MANOVA; explanation for the two tests is found in the text). See Figure 1 1) The width of the tergal spur (sw)/the length of the basal margin (bm). 2) The distance from the basiscutal angle to the margin of the spur (aw)/the length of the tergal spur (si). 3) sl/sw. 4) aw/sw. 5) aw/bm. 6) sl/bm. jim section in the middle of each cyprid. Light intensity was standardized prior to each measurement. Cyprid length was measured with a compound micro- scope and micrometer. The final larval character that was examined, the rate of larval development, required indi- viduals to be drawn from culture and viewed microscop- ically. This process can damage larvae and potentially can introduce bacteria or ciliates to the culture. To min- imize the risk of larval damage or culture contamination, cultures were checked only once each day to determine the developmental stage of the larvae. Results Adult characters Tergal plate ratios or dimensions (Table la-b. Fig. 1) for the six populations were compared in MANOVA and MANCOVA procedures and there was a significant dif- ference between populations (Table II). There were no qualitative differences between the results of the two anal- yses (MANOVA, MANCOVA), indicating that the use of ratios would not, for this data set, lead to spurious inter- pretations. Comparisons among populations clearly showed where the differences were (Table II). The field populations (Salton Sea vs. Mission Bay) were different from each other, as also shown by Henry and Mclaughlin (1975), and were different from all other populations. However, when grown under similar conditions, there was no difference between Salton Sea and Mission Bay indi- viduals: Mission Bay and Salton Sea lab populations were not significantly different, nor were Mission Bay and Sal- ton Sea lagoon populations. Also, the
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
