Results 241 to 250 of about 8,528 (283)
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Endurance swimming of European eel
Journal of Fish Biology, 2004A long‐term swim trial was performed with five female silver eels Anguilla anguilla of 0·8–1·0 kg (c. 80 cm total length, LT) swimming at 0·5 body lengths (BL) s−1, corresponding to the mean swimming speed during spawning migration. The design of the Blazka‐type swim tunnel was significantly improved, and for the first time the flow pattern of a swim ...
G. Van Den Thillart +5 more
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Eel Restocking in France: An Emergency Measure to Save the European Eel
2020The European eel is a migratory species highly dependent on the continuity of its ecosystem. Declining for several years, it is threatened by multiple mortality factors including degradation of its habitat: fragmentation of rivers (dams, hydroelectric works, etc.), water pollution (chemical pollutants, endocrine disruptors, etc.).
Jacqueline Rabic, Déborah Gornet
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Steroid Production in Testicular Tissue of the European Eel*
Endocrinology, 1982Testicular tissue of normal and hCG-stimulated European eels was incubated in vitro with tritiated progesterone or androstenedione as substrates. The following compounds were isolated and identified: 5 beta-androstane-3,17-dione; 17 beta-hydroxy-5 beta-androstan-3-one; androst-4-ene-3,11,17-trione (adrenosterone); 11 beta-hydroxyandrost-4-ene-3,17 ...
B, Eckstein, S, Cohen, V, Hilge
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Reproduction Capacity of European Eels
2009Silver eels, which represent the last known stage in eels under natural conditions, are still sexually immature. Their gonad development is heavily depressed, which is likely related to the very long distance they have to swim before reaching the spawning site, which is about 6,000-km from the European west coast.
Dufour, Sylvie, van den Thillart, Guido
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Ultrasonography to assist with timing of spawning in European eel
Theriogenology, 2017Ovulation in the European eel can be induced by injection of DHP (17α,20β-dihydroxy-4-pregnen-3-one). The timing of injection is based on the developmental stage of the oocytes. The oocyte stage is determined by invasive biopsy or through external indicators of the oocyte hydration response: body weight index (BWI) and body girth index (BGI).
Jéhannet, Pauline +2 more
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Development of the swimbladder in the European eel (Anguilla anguilla)
Cell and Tissue Research, 2002The swimbladder of the adult eel, Anguilla anguilla, with its bipolar countercurrent system, the rete mirabile, is a widely used model for swimbladder function, but very little is known about the development of this swimbladder. Our histological studies on the developing swimbladder revealed that during metamorphosis the swimbladder becomes present as ...
Petra, Zwerger +4 more
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Status of the European Eel Stock and Fisheries
2003The European eel, Anguilla anguilla (L.), is the archetypical eel species, and was the monotypic species for the genus (genus described based on a single species). Much of the scientific knowledge about eels has been acquired first for the European eel, starting with Aristotle executing the earliest scientific experiment on fish.
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Genetic evidence against panmixia in the European eel
Nature, 2001The panmixia hypothesis--that all European eel (Anguilla anguilla) migrate to the Sargasso Sea for reproduction and comprise a single, randomly mating population--is widely accepted. If true, then this peculiar life history strategy would directly impact the population genetics of this species, and eels from European and north African rivers should ...
T, Wirth, L, Bernatchez
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Coelioscopic Investigation in European Eels (Anguilla anguilla)
Journal of Exotic Pet Medicine, 2014Abstract Coelioscopy is a surgical technique in which small incisions are made into the coelomic cavity through which specific instrumentation is inserted to evaluate the internal structures within. For this reason, coelioscopy must be considered a less-invasive surgical method than traditional abdominal surgery. This study was aimed at evaluating and
MACRI', Francesco +5 more
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The Lady and the Eel: how Aphra Behn introduced Europeans to the "numb eel"
Perspectives in Biology and Medicine, 2012Aphra Behn (1640-1689) has been called the first professional British female writer. Behn probably visited Surinam in the 1660s, but it was not until 1688 that she wrote Oroonoko: or, The Royal Slave , the novel for which she is best remembered. Although overlooked by historians of science, Oroonoko provided a description of the "numb eel," effectively
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