Influence of Symbiont Species on the Glycerol and Glucose Pools in a Model Cnidarian-Dinoflagellate Symbiosis.

AbstractSymbiotic dinoflagellates in the family Symbiodiniaceae release mobile compounds (, glucose, glycerol, amino acids, and lipids) to their host's tissues. Little is known about how different symbionts affect quantitative and qualitative differences in these compounds. We tested how symbiont identity affects glycerol and glucose pools in the tissues of the sea anemone ("Aiptasia").

Diel Variation in Prey Capture Behavior by the Corallimorpharian Discosoma sanctithomae: Mechanical and Chemical Activation of Feeding.

The feeding biology of corallimorpharians is poorly understood. This paper describes an envelopment method of prey capture by a Caribbean species, Discosoma (= Rhodactis) sanctithomae, and further examines the stimuli that elicit envelopment and subsequent ingestion of prey. The corallimorpharians exhibited a diel pattern of expansion and contraction of the oral disc margin and tentacles.

The structure of the chambered nautilus siphuncle: The siphuncular epithelium.

The siphuncle of the chambered nautilus (Nautilus macromphalus) is composed of a layer of columnar epithelial cells resting on a vascularized connective tissue base. The siphuncular epithelium taken from chambers that have not yet begun to be emptied of cameral liquid has a dense apical brush border. The great number of apical cell junctions (zonula adherens) compared to the number of nuclei suggests extensive interdigitation of these cells.