The second and smaller of the females with a striped shell and dark
mottled colored animal (pictured left), collected on 8/31/2007, was
placed in an aquarium with a similarly sized male with a gold
colored colored shell and yellow colored animal. The male had been
collected at Hatton Chase a year earlier. The male subsequently
repeatedly mated with the striped female and over the next several
weeks she deposited a series of small egg clutches in the aquarium.
Some of these egg clutches were allowed to hatch and the result is
shown below. The largest of the juveniles pictured measures about 5
mm. Like the previous hatching experiment with the larger striped
female where the coloration of the father was not known, the
hatchlings included both morphs. However, for whatever reason,
mortality was extremely high causing the experiment to be
terminated. Interestingly, when Hatton Chase was first visited on
1/30/2006 virtually all of the snails present in the lake were
typical Pomacea canaliculata as might be found elsewhere
within Duval County (uniformly colored shell with yellow colored
animal). Only rarely was a specimen found with a striped shell - a
morph never seen in the other two Duval County populations. By
11/6/2007 the situation had changed and the morph with the striped
shell and dark mottled animal was equally as common. A sample of the
striped specimens is shown on the next page.
The second and smaller of the females with a striped shell and dark
mottled colored animal (pictured left), collected on 8/31/2007, was
placed in an aquarium with a similarly sized male with a gold
colored colored shell and yellow colored animal. The male had been
collected at Hatton Chase a year earlier. The male subsequently
repeatedly mated with the striped female and over the next several
weeks she deposited a series of small egg clutches in the aquarium.
Some of these egg clutches were allowed to hatch and the result is
shown below. The largest of the juveniles pictured measures about 5
mm. Like the previous hatching experiment with the larger striped
female where the coloration of the father was not known, the
hatchlings included both morphs. However, for whatever reason,
mortality was extremely high causing the experiment to be
terminated. Interestingly, when Hatton Chase was first visited on
1/30/2006 virtually all of the snails present in the lake were
typical Pomacea canaliculata as might be found elsewhere
within Duval County (uniformly colored shell with yellow colored
animal). Only rarely was a specimen found with a striped shell - a
morph never seen in the other two Duval County populations. By
11/6/2007 the situation had changed and the morph with the striped
shell and dark mottled animal was equally as common. A sample of the
striped specimens is shown on the next page.
