The decline of eel Anguilla anguilla (L.) in a river catchment of northern Spain 1986-1997. Further evidence for a critical status of eel in Iberian waters
Archiv für Hydrobiologie Volume 144 Number 2 (1999), p. 245 - 253
published: Jan 22, 1999
ArtNo. ESP141014402004, Price: 29.00 €
Large-scale surveys by the early 80ies showed that, except in a few coastal streams of northern Spain, the eel Anguilla anguilla (L.) was extinct in > 80 % of the Iberian rivers. A long-term (1986-1997) monitoring of eel abundance in the River Esva, a small river catchment where the species was abundant by the mid 80ies, showed a dramatic decline of eel numbers down to the verge of extinction. As inferred by a parallel decline in the commercial catches of elvers, no other cause than a reduced recruitment of elvers could be identified as responsible for the decline of the Esva eel. The status of the eel in the Iberian Peninsula is critical.