. Le bulletin biologique. Biologie ; zoologie ; biologie ; biologie marine. L'autotomie dans les populations de crabe bleu 425 Tableau IV n/K nl escompté par rapport au mlacl ot fréquences observées et celles cmhs manquant ou la régénération de I. 2. J. nr 4 ou plusieurs membres dans le Rhode River. Maryland de 1986 à 1989 Rhode River, Maryland) 1986 1987 1988 1989 Iniurv Obs statut. Exp. Obs. Obs Exp. Exp. Obs. Exp. Intact 1050960505463 536 514 569 -1 528 234 75 138 369 membres 86 122 145 -2 78 83 64 26 membres 18 20 13 34 18 -3 21 612 membres) 4 1 8 - 1 - >4 Membres 12 0,5 4 0,7 3 0,4 3 0,1 G-test P &Lt ; 0,001 P &Lt ; 0,001 P &Lt ; 0.0

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. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. AUTOTOMY IN BLUE CRAB POPULATIONS 425 Table IV n/K nl expected versus observed frequencies ot mlacl cmhs and those missing or regenerating I. 2. J. nr 4 or more limbs in the Rhode River. Maryland from 1986 to 1989 Rhode River, Maryland 1986 1987 1988 1989 Iniurv status Obs. Exp. Obs. Exp Obs. Exp. Obs. Exp. Intact 1050 960 505 463 536 514 569 528 -1 Limb 234 369 75 138 86 122 78 145 -2 Limbs 83 64 26 18 20 13 34 18 -3 Limbs 21 6 12 -) 4 1 8 1 - >4 Limbs 12 0.5 4 0.7 3 0.4 3 0.1 G-test P < 0.001 P < 0.00 1 P < 0.005 P # crabs in the population). The final two categories (-3 and -4 or more limbs) were pooled for analysis. (G-tests. 2 df). and a left cutter cheliped (Table V). The frequency of crabs with a right crusher/left cutter did not differ among years in the Rhode River. Frequencies of crabs with right crusher/left cutter morphology in the upper-mid Chesa- peake Bay and Rhode River in 1989, however, were sig- nificantly higher than those from other sites in that year. Crabs with two cutters were relatively common (7-21%); whereas, left crusher/right cutter morphological patterns were observed less frequently (0.6-10%). Crabs possessing double crushers were extremely rare (<1%). CRABS WITH INJURED LIMB TYPE. Frequencies of crabs bearing right crusher/left cutter morphologies decreased as size increased in the Rhode River in all years (Fig. 11). The frequency of female crabs bearing a right crusher/left cutter was greater than males in three of four years (P = 0.06). Sex differences in the frequency of crusher/cutter patterns were generally con- sistent across size classes (but see 1986, size X sex inter- action). I CRABS WITH INJURED LIMB TYPE. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Marine Biological

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• bookauthorlilliefrankrat
• booksubjectbiology
• booksubjectzoology