Related Experiment Video
Updated: Jan 28, 2026

Collecting Marine Gnathiid Isopod Fish Parasites with Light Traps
Published on: September 25, 2023
Bacterial Flora of Fish from Tropical Sea Water
Luis Roberto DE Leon Fajardo1, E H Marth1
1Central American Research Institute for Industry, P.O. Box 1552, Guatemala, Central America, and Department of Food Science, University of Wisconsin, Madison, Wisconsin 53706.
Abstract:
Five lots of fish were examined microbiologically for aerobic plate count at 10 and 30 C. coliform and enterococcus counts, presence of coagulase-positive Staphylococcus aureus and genera of bacteria appearing on the aerobic plates. After initial analyses. fish were stored in ice, held there for a week and then aerobic plate counts and isolation of colonies for identification as to genus were done again. Aerobic plate counts ranged from 104 to 107 per gram of skin at the beginning of storage in ice and increased to 106 to 109 per gram at the end of 7 days of storage. Coliforms and enterococci were found in fresh fish but no S. aureus was detected. Gram-negative bacteria accounted for about half of the bacteria on fresh fish, predominated as spoilage advanced and eventually formed the major part of the flora. Pseudomonas , Moraxella and Alcaligenes were the principal genera of gram-negative bacteria at the end of storage.
More Related Videos
Related Concept Videos
Bacterial Flora of the Large Intestine
The normal gut flora of the colon plays a critical role in generating essential vitamins such as vitamins K, B5, and B7.
Effect of Sea Water on Concrete
Concrete in areas between tide marks,...
Osmoregulation in Fishes
States of Water
Water freezes when the intermolecular forces are greater than the kinetic energy. Unlike most other substances, water is less dense in its solid state than in its liquid state. This is because each water molecule can form...
The Water Cycle
Water and Mineral Acquisition

