Age and Shell Growth in the Freshwater Snail, Goniobasis proxima (Say)

Publisher Website
Google Scholar
Abstract
To determine predictive relationships among size, growth and age in the gastropod, Goniobasis proxima, field growth experiments were conducted in a small stream during the early fall of 1964. The relationship between growth/mo. (Y) and initial shell width (X) was given by log Y = 0.0422 - 0.1641 X. Using this equation and an estimated asymptotic shell width of 6.25 mm, and equation relating age and cumulative shell growth was ascertained to be of the form S = 6.25 - 4.25 e-0.1221 t wherere S equals shell width in mm and t is age in months. On the basis of a prior marking experiment and the size-age equation, maximum longevity under natural conditions was estimated to range from 3 to 4 yr. A weight-size equation (log Y = 6937 + 0.412 X) was also developed where Y equals weight (live) in mg and X equals shell width. Consequently, with these last 2 equations it is possible to estimate both the age and weight of a snail from its shell width.

This publication has 0 references indexed in Scilit: