ISSN:
0003-276X
Keywords:
Life and Medical Sciences
;
Cell & Developmental Biology
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Medicine
Notes:
Body weight and length, weights of 14 organs and 15 linear measurements are presented from 97 Amblystoma tigrinum melanosticum before metamorphosis and 57 specimens after metamorphosis. These data are compared with similar measurements (previously published) on adult salamanders.Body weight and weights of the digestive tube and its subdivisions, liver, pancreas, spleen, eyeballs and brain are heavier in the larvae. The body weight decreases more than many of the organs and hence the percentage weights of the heart, lungs, liver, spleen, kidneys, gonads, eyeballs and brain are larger, relatively, in the post-metamorphosis salamanders.Since body length is not significantly changed, the percentage lengths are much the same. Length of the digestive tube and its parts, jaw width and the width of the body at pectoral, belly and pelvic regions are all longer in the larvae. The limbs are the only percentage lengths greater in the post-metamorphosis salamanders.All of the weights and all of the linear measurements are significantly correlated with body weight or length, respectively.Four organs show increases in percentage weights at all three periods: gonads, lungs, liver and spleen. Two others have an increase in post-metamorphosis: heart and kidneys. The digestive tube and its parts and the pancreas have a relative decrease at the end of metamorphosis. The eyeballs are relatively largest in the post-metamorphosis, and smallest in the adults.
Additional Material:
4 Tab.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/ar.1091480204
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