zooid

In well-fed colonies, one of these buds can even divide to give rise to two buds on one side of the zooid, producing one further zooid (Berrill, 1947).

Zooid and colony growth in encrusting cheilostome bryozoans.

Comparison of the two genera shows an increase in larval size at hatching, a decrease in the number of eggs per zooid, and an increase in development time between Botryllus and Botrylloides species.

A colorless hemolymph containing various kinds of circulating hemocytes flows inside the lacunae and sinuses of the zooid open circulatory system and in the tunic vasculature that connects all the zooids and buds of the colony.

Crump has worked with Vijay Iyer and in Joel Harrison's Free Country, while Ellman is in Henry Threadgill's Zooid band, and Fox has played with Joan Baez.

This suggests that none of the plasticity in the zooid morphologies that they detected was induced by biotic agents.

First, sexually mature colonies vary in sperm production due to variation in the number of sperm produced within each testis (each zooid in a sexually mature colony contains two testes).

While one may be able to characterize the rate of calcification of an individual zooid, how does that relate to the growth of a whole colony?

The authors observed an exponential growth of colonies of Epistylis pygmaeum Ehrenberg, 1838, from a single zooid, attached to the rotifer Brachionus angularis (Gosse, 1851), but no actual growth or colonization rates were calculated for the trophont stage of this species.

Larval development was recorded as follows: individuals were scored as either dead, swimming, on the bottom but not settled, settled, settled and metamorphosed, metamorphosed with one zooid, metamorphosed with two zooids, or metamorphosed and dead.

In this model, both the symbiont and the bryostatins are transported to the developing embryo within the ovicell-bearing zooid via the funicular cords (Fig.

Changes in zooid morphology within cheilostome colonies have been induced by varying temperature, food supply, or the presence and absence of predators (Menon 1972; Jebram 1978; Harvell 1984, 1986).

Repeatabilities were obtained as among-colony components of phenotypic variance partitioned by single-classification ANOVA on the individual zooid data.

Adaptation and constraint as determinants of zooid and ovicell size among encrusting ascophoran cheilostome Bryozoa from opposite sides of the Isthmus of Panama.