. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 170 A. SAGI ET AL. Q O . O <r 20- 1 6-. ABRADED(A) UNABRADED(U) SMALL (S) not selected large claw males small claw males 16 17 18 19 20 LOG CARAPACE Figure 1. Regression analysis of log-transformed carapace and pro- podus data from a summer population of male Libinia emarginata. Three male types were found in the sample: abraded (D) and unabraded (•) males with relatively large propoduses (the upper regression line) and small claw type (•) (the lower regression line). Animals marked not selected (.) were presen
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 170 A. SAGI ET AL. Q O . O <r 20- 1 6-. ABRADED(A) UNABRADED(U) SMALL (S) not selected large claw males small claw males 16 17 18 19 20 LOG CARAPACE Figure 1. Regression analysis of log-transformed carapace and pro- podus data from a summer population of male Libinia emarginata. Three male types were found in the sample: abraded (D) and unabraded (•) males with relatively large propoduses (the upper regression line) and small claw type (•) (the lower regression line). Animals marked not selected (.) were present in the original sample but not used in this study. mically transformed prior to the analysis of linear regres- sion (Tessier, 1960; Kuris £>/«/., 1987). Assuming that the specific activity of the radiolabeled methyl farnesoate synthesized by the gland is equal to that of the precursor, and that only one labeled methyl group is incorporated into each methyl farnesoate molecule, the in vitro synthetic rates of the mandibular organs were calculated and ex- pressed in nanomoles/gland/h as was previously calculated for Libinia emarginata (Laufer et a/., 1987) and Procam- barus clarkii glands (Landau el ai. 1989). Pearson correlation coefficients and Waller-Duncan k- ratio / test were calculated using the Statistical Analysis System (SAS Institute, Gary, North Carolina). Results Types of male L. emarginata Males (204 individuals), with carapace length greater than 35 mm, were plotted with respect to log propodus versus log carapace (Fig. 1). The population appears to fall into two linear clusters (Homola et ai. 1992). The upper regression line represents the large-clawed males while the lower regression line represents unabraded small- clawed males (S). Among the large-clawed males, two dis- tinct classes emerged with respect to exoskeleton texture. Abraded males (A) were quite smooth and were presumed to have molted a long time ago; unabraded males (U) had velvety epicuti
Size: 1744px × 1433px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
