The influence of dissolved oxygen and carbon dioxide on fish schooling behavior

✍ Scribed by S. A. Moss; W. N. McFarland

• Publisher: Springer-Verlag
• Year: 1970
• Tongue: English
• Weight: 937 KB
• Volume: 5
• Category: Article
• ISSN: 0025-3162
• DOI: 10.1007/bf00352592

✦ Synopsis

Slow reduction of dissolved oxygen concentrations or slowly increased carbon dioxide (reduced pH) did not cause measurable changes in the density, nearest neighbor orientation, or the swimming speed of experimental schools of the northern anchovy Engraulis mordax, until near-lethal levels were reached. Rapid reductions of oxygen or pit, however, caused significant increases in average swimming velocity. Positive reactions were correlated to rapid reductions of no more than 0.55 mg 02/1 or 0.25 pH units. These responses are related to the hypothesis that metabolic reductions of environmental dissolved oxygen and/or pit may influence the internal structure and behavior of fish schools.