Related Experiment Video
Updated: May 5, 2026

A Fish-feeding Laboratory Bioassay to Assess the Antipredatory Activity of Secondary Metabolites from the Tissues of Marine Organisms
Published on: January 11, 2015
Defensive behavior and toxicity of ascoglossan opisthobranchMourgona germaineae marcus
1Department of Biological Sciences, Florida Institute of Technology, 32901, Melbourne, Florida.
Abstract:
The ascoglossan (= sacoglossan) opisthobranchMourgona germaineae Marcus secretes a viscid mucus and autotomizes cerata when mechanically disturbed. Other small invertebrates, i.e., sea anemones, amphipods, and other ascoglossans, will die when placed with these autotomized cerata or in the water in which they have been autotomized. The toxin is methanol-soluble and water-soluble and thus is probably a small molecule. Simultaneous TLC of chloroform and methanol-water extracts ofM. germaineae and of its food alga,Cymopolia barbata indicates that the toxin is most likely of dietary origin.
More Related Videos
07:59A Strain Gauge Monitor SGM for Continuous Valve Gape Measurements in Bivalve Molluscs in Response to Laboratory Induced Diel-cycling Hypoxia and pH
Published on: August 1, 2018
07:28A Toxicological and Ecotoxicological Assay Based on Mussel (Mytilus galloprovincialis) Hemocytes Motility
Published on: December 13, 2024
Related Concept Videos
Toxicity Testing in Animals
Anticholinesterase Agents: Poisoning and Treatment
Irreversible agents form a strong bond with the cholinesterase enzyme, making it inactive. The breakdown of the phosphorylated enzyme is...
Toxic Reactions: Overview
Toxicity falls into two primary categories: local and systemic.
Local toxicity appears at the exposure site, such as protein denaturation caused by caustic substances.
In contrast, systemic toxicity requires the toxic agent's absorption and distribution,...
Ligand-Gated Ion Channel Receptor: Gating Mechanism
Defenses Against Pathogens and Herbivores
Osmoregulation in Fishes