Investigations into the Origin(s) of the Freshwater Attractant(s) of the American Eel
Anguillid eels are thought to spawn in mid-ocean gyres and after spending a year or more as drifting larvae metamorphose into elvers (juveniles). Elvers possess a strong tendency to swim into fresh water. As this tendency is not shown by olfactory-ablated animals (Hain, 1975), or in charcoal-filtered, aged, or well water (Creutzberg, 1961; Miles, 1968) a chemical attractant is thought responsible. Because elvers do not consistently prefer the water from which they were collected the attractant is thought to be innately recognized (Miles, 1968). Teichmann (1957) showed eels to detect odorants at concentrations of 1:2.9 × 10−18 molar, giving them the best sense of smell among the fishes.
KeywordsSockeye Salmon Aquatic Weed Artifical Pond Water Larva Metamorphose Chemical Attractant
Unable to display preview. Download preview PDF.
- Hain, J.H.W. 1975. Migratory orientation in the American eel. Unpublished Ph.D. thesis. University of Rhode Island. Kingston, Rhode Island. 126 p.Google Scholar
- Walker, T.J. and A.D. Hasler. 1949. Detection and discrimination of odors of aquatic plants by the bluntnose minnow (Iiybor nchus notatus). Physiol. Zoo. 22. 45–63.Google Scholar