Full length paper

Estudio morfométrico sobre el desarrollo y evolución de las glándulas tiroides durante la metamorfosis de Bufo arenarum

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Cuadernos de Herpetología 10 (1-2): 47-57, 1996

Abstract

We studied the development and evolution of thyroid glands during Bufo arenarum morphogenesis. Using different morphometric parameters we related larval growth and metamorphosis with thyroid glands development We observed that total length, larval weight, thyroid gland volume and follicle diameter increased until stage XV (end of prometamorphosis), meanwhile the number of follicles and follicle cell height increased until stage XVII (midclimax). All these parameters decreased during metamorphic climax and an increase was observed in postmetamorphic animals. Our results lead us to conclude that during larval growth there is a period of synthesis and store of thyroid hormones. There is a second period characterized by thyroid hormones release during the end of prometamorphosis and metamorphic climax.

Key words:

Bufo arenarum; desarrollo; glándulas tiroides; metamorfosis

Miranda, L.A. & Pisanó, A. 1996. Estudio morfométrico sobre el desarrollo y evolución de las glándulas tiroides durante la metamorfosis de Bufo arenarum. Cuadernos de Herpetología 10: 47-57.