Electric eel in 1950s: Keynes / Nachmansohn era
[180] [more-electric-eel-80] In 1950s, the field log for Electric eel is headed “Keynes / Nachmansohn era.” The figure kept beside that heading is 860. It is a count or a date from the work, not a rank of the species’ worth. A zoo birthday card does not replace the log. Night hunting of fish and invertebrates. High-voltage volleys are metabolically expensive; weak pulses map the murk more cheaply.
Amazon knifefishes whose stacked electrocytes taught Humboldt, Volta arguments and a 2019 species split. No. It is a gymnotiform knifefish. The body plan and voltage organ are South American, not Anguilliform. A 2019 Nature Communications paper split Electrophorus into three: E. electricus, E. voltai and E. varii. Voltage and DNA both argued for the split.
E. voltai has been measured near 860 V. That is a prey-stun and defence pulse, not a household-current analogy that holds in every tank. What did Humboldt actually do in 1800? His account of horses herded into a pool of eels became a European science anecdote. Later readers treated it as a method; it was also travel theatre.
Did electric eels inspire the battery? Volta and Galvani debates used animal electricity. Electrophorus was a New World exhibit in that argument, not the sole inventor of the pile. A high-voltage volley can freeze prey; a weaker field maps the night water. Kenneth Catania high-speed videos in the 2010s showed doublets that twitch hidden fish.
Keep 1950s, “Keynes / Nachmansohn era,” and 860 together or the note on Electric eel stops being that year’s record.1950s
Figures to keep
- Year of the note
- 1950s
- Figure to keep
- 860
- Species
- Electric eel
- Line in the log
- Keynes / Nachmansohn era
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