A STEREOLOGICAL ESTIMATION OF GONAD VOLUME AND OOCYTE NUMBER IN A SPECIMEN OF A NATIVE CLAM (VENERUPIS PULLASTRA)

Pablo Alvarez Fariña, Ximo Gual-Arnau

Abstract

We obtained the gonad volume and oocyte number in a single Venerupis pullastra (Montagu, 1803) using unbiased stereological estimators. Since the gonad is not a fixed anatomical structure and is merged with other organs in the clam, we used new variance expressions to study the efficiency of these estimators, where the isotropy condition is not required for the covariogram.

Keywords
fecundity; gonad volume; oocyte number; stereology; unbiased estimators; variance; Venerupis pullastra

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DOI: 10.5566/ias.v25.p105-110

Image Analysis & Stereology
EISSN 1854-5165 (Electronic version)
ISSN 1580-3139 (Printed version)