The research projects completed in my laboratory are primarily focused on aspects
of the life history, development, physiology, and ecology of invertebrate animals,
with particular emphasis on the free-living developmental stages called larvae. We
complete these studies using both marine and freshwater forms collected from polar
regions (Antarctica), the deep-sea, the tropics, temperate marine waters, and local
Adult Calocidaris micans (Echinodermata: Echinoidea) at a depth of ca. 300 m from the Bahamas.
At present I have ongoing projects that relate to the following processes:
- Assimilation of dissolved organic materials (DOM) from the environment by planktonic
adults and larvae of marine and freshwater invertebrates.
- Patterns and processes of nutrient distribution in planktonic adults and larvae of
marine and freshwater invertebrates.
- Morphological development during the asexual production of so-called secondary larvae
of subtropical and tropical sea stars.
Adult Phoromosa placenta (Echinodermata: Echinoidea) at a depth of ca. 500 m from the Bahamas.
- The scaling of egg size (volume), egg energy content, and egg biomass among animal
- The energetic cost of intracapsular development of the freshwater snail Physa acuta.
- Correlations among maternal investment and measures of juvenile size in the among
and within egg masses of the freshwater snail Physa acuta.
Although each project requires different analytical capabilities, we have access to
a variety of forms of microscopy: scanning laser confocal microscopy, scanning electron
microscopy, fluorescence microscopy and light microscopy.
Colorize scanning electron micrograph of the anterior end of the rotifer (Brachionus plicatilis) showing the arrangement of the ciliated bands that compose the locomotory and feeding
structure of rotifers, the corona.