Age and growth of yellow eel, Anguilla anguilla (L.), determined by two different methods

Abstract Stocking of young eel is widely practised, as a measure, to meet the management target of the EU eel recovery plan. The target of the recovery plan is to increase the escapement to 40% silver eel biomass, relative to pristine conditions. The scientific information to predict the outcome in silver eel biomass from stocking is limited and may depend on whether translocation of wild glass eel or yellow eel is used, or if the stocked eels used are yellow eel from aquaculture. We evaluated the yield from stocking two different sizes, 3 and 9 g eels from aquaculture. A professional fishery recaptured 12.7% of the 3 g and 9.4% of the 9 g eels, originally stocked. Growth rate and mortality rate were different for the two stocked sizes, favouring the small eels. Brutto yield per recruit (YPR) was 13 and 9.2 g and netto YPR was 9.8 and 0.31 g for 3 and 9 g eel, respectively. We conclude that there seems to be no advantage in using larger 9 g eels compared with small 3 g eels for stocking.

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Effects of hydrostatic pressure and temperature on the energy metabolism of the Chinese crab (Eriocheir sinensis) and the yellow eel (Anguilla anguilla)

Comparative Biochemistry and Physiology Part A Physiology ◽

10.1016/0300-9629(95)00079-m ◽

1995 ◽

Vol 112 (1) ◽

pp. 131-136 ◽

Cited By ~ 10

Author(s):

Philippe Sébert ◽

André Péqueux ◽

Bernard Simon ◽

L. Barthélémy

Keyword(s):

Energy Metabolism ◽

Hydrostatic Pressure ◽

Anguilla Anguilla ◽

Eriocheir Sinensis ◽

Yellow Eel

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Elemental composition of otoliths as a discriminator of life stage and growth habitat of the European eel, Anguilla anguilla

Marine and Freshwater Research ◽

10.1071/mf04167 ◽

2005 ◽

Vol 56 (5) ◽

pp. 629 ◽

Cited By ~ 8

Author(s):

W. N. Tzeng ◽

K. P. Severin ◽

C. H. Wang ◽

H. Wickström

Keyword(s):

Elemental Composition ◽

Environmental History ◽

Life Stage ◽

Anguilla Anguilla ◽

Primary Component ◽

European Eel ◽

Yellow Eel ◽

Minor Elements ◽

Electron Probe Microanalyser ◽

History Of

The hypothesis that elemental composition of otoliths of the eel (Anguilla spp.) changes with life stage and growth habitat was tested in the present study. The minor elements Cl, Na, K, Mg, Ca, Sr and P in otoliths of European eels (Anguilla anguilla) were examined by using an Electron Probe Microanalyser (EPMA) equipped with wavelength dispersive spectrometers (Cameca SX-50). Yellow-stage eels were collected from coastal waters and lakes of Sweden in 1987, 1988, 1991, and 1994, with ages ranging from 5 to 18 years old. Strontium maps and profiles of Sr : Ca ratio, as well as the elver check in otoliths, were used to classify life history stages of the eels as leptocephalus, and freshwater- and seawater-resident yellow eels. Canonical score plots of the otolith elemental compositions of the freshwater-resident yellow eel were completely separated from those of leptocephalus and seawater-resident yellow eel, but the latter two partially overlapped. Strontium is the primary component in determining the discrimination, but the nutrient-related (S and P), and the physiologically controlled elements (Na and Cl), may also play an important role in the discrimination. These results indicate that multiple-elemental information can provide additional insight into the migratory environmental history of diadromous fishes.

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