Tuesday, November 26, 2013

He considered that leptocephali collected in the Sargasso Sea by Schmidt in 1920 and later were mos

"Eels and the Sargasso Sea: Myth or Reality? Hydrobioloblog
Spawning occurs in the Sargasso Sea, and after hatching, american fisheries society the larvae are carried by ocean currents (Gulf Stream) to European shores. Approaching dimensions, these larvae will undergo a first metamorphosis (morphological, anatomical and physiological changes) to become elvers (baby eels or south of the Loire), transparent.
They then become elvers up courses more or less water far inland. Elvers become yellow eels continue their growth and progress american fisheries society upstream. This stage lasts several years. The growth phase ends with a second metamorphosis turning yellow eels silver eels ready to regain the deep ocean. In autumn, american fisheries society when the first floods, silver eels return to the sea, carried by the current. Migration, 5,000 km long (lasting 4 months) remains unclear and maintains the mystery of eel.
Roland Bellet, DVM specializing in ichthyology, was partly devoted to the study of the reproduction of the eel, following comments he made in his farms and clear marennes.
He considers that in reality a European eel spawning takes place in in marine estuaries of our rivers and coastal rivers in a saltwater environment. Proven: The presence in the abdomen of some non expelled after laying eggs, female eels caught on coastal mudflats. The discovery of a leptocephalus newborn in her clear eel near Marennes. american fisheries society The discovery, twice an important spawning ground Oleron Island in April 2011.
He considered that leptocephali collected in the Sargasso Sea by Schmidt in 1920 and later were mostly tropical eel larvae, called Cuba - smaller. He thinks he is not breeding eels in Europe across the Atlantic Ocean - for reasons of distance, temperature, pressure and even physiology of these fish. For him, such a trip would biologically meaningless. He denounces errors scientific thoughts about the biology of the eel: the European eel is not a pelagic species, that is to say, a fish on the high seas She is neither in its larval form and the adult form. Rather it is a benthic fish, groundfish and especially fish that live in the mud. it performs the only migration is a migration of the coastal american fisheries society zone, upstream of rivers and freshwater rivers of the continent and the downstream migration american fisheries society during its return to the coast. It spent several years in temperate freshwater, allows a strong physical growth, increases longevity and delays sexual maturity. the silver eel adult stays back at sea at the mouth of the river estuary or river and not going on the high seas She lives in the turbidity maximum zone therein, eminently rich zone Nutrient
According to reproduction would be as follows: The females leave the bottom of the "couraud" main they held to go over the side mudflats saltier area or in a muddy and salty channel. They dig their burrows and will receive the young and old males which are also sexual development. Spawning and fertilization will take place. Larvae (leptocephali) then do not have him by the biological characteristics to an important trip. These larvae remain known place to feed and grow in the turbidity maximum. This theory is based on a particular observation (2005 and 2009) larvae (leptocephali) in its clear Marennes whereas this stage should not be visible in the Sargasso Sea. In addition, in April 2011, he observed what he believed to be a spawning eel on the island of Oleron following very specific weather conditions, unusual nighttime gathering of eels is in marine channels.
No. 4-0110 - Warren eels in the mud of a "clear" american fisheries society Marennes which we saw the inhabitants out at the last complete dry as this habitat is never mentioned in the specific books. The whole book of Dr. Bellet studies and describes american fisheries society other aspects of the life of the eel.
The full summary of the study by Dr. Bellet (900 pages!) Is on this small website american fisheries society http://reproduction-anguille.anguilla-bellet.com/index.htm Photos are from this website and are the property american fisheries society of

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