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Temperature requirements are suggested to be flexible. It has been found that American eels during elver stage can survive temperature as low as −0.8 °C (30.6 °F). Barila and Stauffer (1980) reported a final mean temperature preference at 16.7 °C (62.1 °F).
* Normal human body temperature is 36.8 °C ±0.7 °C, or 98.2 °F ±1.3 °F. The commonly given value 98.6 °F is simply the exact conversion of the nineteenth-century German standard of 37 °C. Since it does not list an acceptable range, it could therefore be said to have excess (invalid) precision.
European eels live through 5 stages of development: larva (leptocephalus), glass eel, elver, yellow eel, and silver eel.Adults in the yellow phase are normally around 45–65 centimetres (18–26 in) and rarely reach more than 1.0 metre (3 ft 3 in), but can reach a length of up to 1.33 metres (4 ft 4 in) in exceptional cases. [8]
Eel larvae then metamorphose into glass eels and become elvers before finally seeking out their juvenile and adult habitats. [8] Some individuals of anguillid elvers remains in brackish and marine areas close to coastlines, [ 13 ] but most of them enter freshwater where they travel upstream and are forced to climb up obstructions, such as weirs ...
Fishermen in the U.S.'s only commercial-scale fishing industry for valuable baby eels once again had a productive season searching for the tiny fish. Baby eels, called elvers, are often worth more ...
The eel fishing season happens every spring and Maine is the only U.S. state with a significant, legal fishery for elvers. Last year's harvest was worth about $2,031 per pound, orders of magnitude ...
The only state in the country with a significant elver catch is Maine, where fishermen have voiced concerns in recent months about the possibility of a cut to the fishery's strict quota system.
Anguillids can withstand a wide variety of temperatures but the optimum temperature in cultured species is between 22 °C and 28 °C- at this temperature growth is maximised [8] Recent work has determined that the optimal water temperature is for maximal growth of short-finned eels is 26.5 °C, and salinity is optimum at 17.5%.
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