The transition stage from trochophores
to D-stage veligers was first seen at 22 h postfertilization and were present for only 2 h.
Influence of lowered salinity and elevated cadmium on the survival and metamorphosis of trochophores
in Capitella sp.
Hatching success (Stage 14) was calculated by dividing the number of trochophores
by the starting number of fertilized eggs.
and veligers were moving within egg capsules on days 4 and 6, respectively.
Conversely, the apical tuft was observed on trochophores
just before hatching into the veliger stage, before the velum division (Koike 1978).
For example, for 3-day-old trochophores
of the capitellid Mediomastus fragile (presumed to feed with opposed bands), maximum clearance was [approximately equal to]0.
Homology of the ciliary bands of spiralian trochophores
and other larvae.
After the initial mineralization, the larvae are often called trochophores
and the new mineralized shell is homogenous and composed mostly of calcium carbonate (Eyster 1986).
collaris covers about the same fraction of the total surface area of the larva when compared with early trochophores
of other polychaetes (14% as compared to 11%-38% for other polychaetes; Costello, 1945; Anderson, 1959; Akesson, 1967).
Some correlations between indicators of reproductive and larval performance were significant (Table 2); fecundity was correlated with the number of trochophores
(r = 0.
These large cells are shed at metamorphosis just like the trochoblasts of planktotrophic trochophores
The number of trochophores
and D-stage larvae were recorded.