Abstract The upstream movement of juvenile eels (median total length (TL) = 138 mm) in the Mondego River, Portugal, was analysed between January 2017 and August 2019. A 12,019 individuals (TL ranging from 60 to 287 were counted measured on an eel ladder at Coimbra weir, 44 km river mouth, during their movements. Although throughout year, a clear seasonal peak detected spring late summer, with 9...

Bu çal??mada Büyük Menderes Nehri’nde (Ayd?n) yakalanan Scardinius erythrophthalmus (k?z?lkanat) ve Anguilla anguilla (y?lan bal???) tatl? su bal??? türlerinin kas dokusundaki ya? asidi bile?imlerinin karakterize edilmesi ?3/?6 oranlar?n?n belirlenmesi amaçland?. Bal?klar?n doku örneklerinden elde edilen metil esterleri gaz kromatografisi (GC) ile analiz edildi. En bol bulunan doymu? asitleri S...

Many anguillid eel species display facultative catadromy. Some spend their entire life cycle in marine coastal areas, but the geographical extent of this, especially at extremes distributional ranges, is unknown. We analysed otolith Sr:Ca and Ba:Ca from yellow-stage European ( Anguilla anguilla) sampled along coast Norway several freshwater lakes (58°N–63°N), to infer initial settlement later m...