Developmental changes in the body proportions of western North Pacific Bryde’s whales (Balaenoptera edeni) were investigated by examining the proportion of each body part to the total body length. The head and chest ...Developmental changes in the body proportions of western North Pacific Bryde’s whales (Balaenoptera edeni) were investigated by examining the proportion of each body part to the total body length. The head and chest region increased to a certain body length;subsequently, the length of head region stabilized, and that of the chest region decreased. The length of the abdominal region remained constant to a certain body length and subsequently showed a marked increase, and that of the tail region decreased consistently. The length of dorsal fin and flukes decreased consistently, whereas that of the flippers remained constant to a certain body length and subsequently decreased. The relative growth pattern determined by an allometric analysis was positive for the head region but negative for the lower body part, flippers, flukes, and dorsal fin. Both sexes demonstrated the same growth pattern, but the coefficients differed. This is the first study to investigate developmental changes in the body proportions of Bryde’s whales using more than 700 specimens covering a wide body length range. We believe that the results of this study will contribute to various research fields, including taxonomy, phylogeny, and feeding ecology of this species.展开更多
<div style="text-align:justify;"> <span style="font-family:Verdana;"><strong>Objective:</strong> To test the hypothesis that the type 2 diabetes mellitus (T2DM) phenotype in...<div style="text-align:justify;"> <span style="font-family:Verdana;"><strong>Objective:</strong> To test the hypothesis that the type 2 diabetes mellitus (T2DM) phenotype in an indigenous population is characterized by proportionally short legs and obesity. <strong>Methods:</strong> Anthropometric characteristics were compared in females and males with T2DM (n = 20, n = 8, respectively) and without T2DM (n = 117, n = 93, respectively). Factor analysis derived dimensions were regressed on T2DM in logistic regression. <strong>Results:</strong> Weight, sitting height ratio and hip circumference were significantly lower (p < 0.0001) in females, while waist: hip ratio was significantly higher among women and men with T2DM (p < 0.0001 and p < 0.008, respectively). Arm circumference, triceps skinfold, arm muscle circumference, and right and left grip strength were significantly lower among T2DM women (p < 0.0001 for each). Five rotated principal components accounted for 86.7% of the variance: muscular (grip) strength (29.6%), body mass (27.9%), central adiposity (10.7%), body height (9.3%), and trunk length (9.2%). Regression of factors on T2DM status among females indicated muscle strength (OR = 0.16, 95% CI: 0.04 - 0.71) and central adiposity (OR = 13.76, 95% CI: 3.80 - 49.83) were predictors of T2DM. In males, muscle strength (OR = 0.28, 95% CI: 0.07 - 1.08, p < 0.06) and central adiposity significantly predicted T2DM (OR = 3.17, 95% CI: 95% 1.11 - 9.04, p < 0.008). <strong>Conclusion: </strong>Reduced muscle strength/mass and increased central adiposity characterize the T2DM phenotype.</span> </div>展开更多
文摘Developmental changes in the body proportions of western North Pacific Bryde’s whales (Balaenoptera edeni) were investigated by examining the proportion of each body part to the total body length. The head and chest region increased to a certain body length;subsequently, the length of head region stabilized, and that of the chest region decreased. The length of the abdominal region remained constant to a certain body length and subsequently showed a marked increase, and that of the tail region decreased consistently. The length of dorsal fin and flukes decreased consistently, whereas that of the flippers remained constant to a certain body length and subsequently decreased. The relative growth pattern determined by an allometric analysis was positive for the head region but negative for the lower body part, flippers, flukes, and dorsal fin. Both sexes demonstrated the same growth pattern, but the coefficients differed. This is the first study to investigate developmental changes in the body proportions of Bryde’s whales using more than 700 specimens covering a wide body length range. We believe that the results of this study will contribute to various research fields, including taxonomy, phylogeny, and feeding ecology of this species.
文摘<div style="text-align:justify;"> <span style="font-family:Verdana;"><strong>Objective:</strong> To test the hypothesis that the type 2 diabetes mellitus (T2DM) phenotype in an indigenous population is characterized by proportionally short legs and obesity. <strong>Methods:</strong> Anthropometric characteristics were compared in females and males with T2DM (n = 20, n = 8, respectively) and without T2DM (n = 117, n = 93, respectively). Factor analysis derived dimensions were regressed on T2DM in logistic regression. <strong>Results:</strong> Weight, sitting height ratio and hip circumference were significantly lower (p < 0.0001) in females, while waist: hip ratio was significantly higher among women and men with T2DM (p < 0.0001 and p < 0.008, respectively). Arm circumference, triceps skinfold, arm muscle circumference, and right and left grip strength were significantly lower among T2DM women (p < 0.0001 for each). Five rotated principal components accounted for 86.7% of the variance: muscular (grip) strength (29.6%), body mass (27.9%), central adiposity (10.7%), body height (9.3%), and trunk length (9.2%). Regression of factors on T2DM status among females indicated muscle strength (OR = 0.16, 95% CI: 0.04 - 0.71) and central adiposity (OR = 13.76, 95% CI: 3.80 - 49.83) were predictors of T2DM. In males, muscle strength (OR = 0.28, 95% CI: 0.07 - 1.08, p < 0.06) and central adiposity significantly predicted T2DM (OR = 3.17, 95% CI: 95% 1.11 - 9.04, p < 0.008). <strong>Conclusion: </strong>Reduced muscle strength/mass and increased central adiposity characterize the T2DM phenotype.</span> </div>
