. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. ONTOGENY OF SQUID MANTLE KINEMATICS 161 ai 88 OS 12 - .2 •$ '•" C 10 • •IH- « s % ** S-5 S • •^ C ^^- o 2 +** u •£ on £ c 6 • **^* ^ 4 • 4-+ +^ j* ^ 1 ~ -1 +** + 83 s 0 • 10 20 30 40 50 60 70 80 Dorsal Mantle Length (mm) 90 Figure 6. Ontogenetic change in the maximum rate of mantle contrac- tion. Each point represents the maximum rate of mantle contraction during the escape jet for one individual. The maximum mantle contraction rate of the escape jet decreased significantly during ontogeny (Spearman rank order correlati
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. ONTOGENY OF SQUID MANTLE KINEMATICS 161 ai 88 OS 12 - .2 •$ '•" C 10 • •IH- « s % ** S-5 S • •^ C ^^- o 2 +** u •£ on £ c 6 • **^* ^ 4 • 4-+ +^ j* ^ 1 ~ -1 +** + 83 s 0 • 10 20 30 40 50 60 70 80 Dorsal Mantle Length (mm) 90 Figure 6. Ontogenetic change in the maximum rate of mantle contrac- tion. Each point represents the maximum rate of mantle contraction during the escape jet for one individual. The maximum mantle contraction rate of the escape jet decreased significantly during ontogeny (Spearman rank order correlation coefficient. , P < , n = 49). way ANOVA. Student-Newman-Keuls test, P < ; Table 1). The maximum rate of mantle contraction during the es- cape jet was highest in newly hatched squid and declined during ontogeny (Fig. 6; Spearman rank order correlation coefficient, , P « , n = 49). The maximum rate of mantle contraction varied from 7 to 13 mantle circumference lengths per second in newly hatched squid and from 3 to 5 lengths per second in the largest squid (Fig. 6). A one-way ANOVA among the life-history stages (Se- gawa, 1987) indicated that hatchling stage S. lessoniana had a significantly greater maximum rate of mantle contraction during the escape jet than all other life history stages (Stu- dent-Newman-Keuls test. P < ; Table 1). Morphometrics Mass-specific mantle cavity volume decreased during ontogeny (Fig. 7A). Despite the variation among squid of similar size, there was a significant negative correlation between mass-specific mantle cavity volume and dorsal mantle length (Spearman rank order correlation coefficient, P = n = 36). The thickness of the mantle wall increased during ontog- eny (Fig. 7B). The slope of the regression, , was sig- nificantly greater than 1 (Student's t test, P < ). Mantle radius also increased during ontogeny (Fig. 7C). The slope of the regression, , w
Size: 1655px × 1510px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
