Sea trout migration in the Rhine delta

Abstract

Sea trout Salmo trutta migration in the Rhine delta, The Netherlands, was studied using the NEDAP TRAIL System®, consisting of a chain of fixed detection stations and transponders, each transmitting a unique code. From 16 December 1996 to 31 December 2000, 195 (34%) out of 580 tagged sea trout were detected. Inland migration of sea trout was observed through the sluices in the dam between the Wadden Sea and Lake IJsselmeer (Afsluitdijk), the Nieuwe Waterweg and the sluices in the Haringvliet Dam. Seventy‐five per cent were detected for the first time at one of the detection stations within 30 days after tagging. Inland migration through the sluices in the Afsluitdijk, the Nieuwe Waterweg and the sluices in the Haringvliet Dam was observed for 34, 103 and 70 sea trout, respectively. Based on the number of tagged fish released in the adjacent coastal areas, however, migration through the Afsluitdijk was most important. During migration in fresh water, sea trout was predominantly active during daylight. Fish entering the Rhine delta through the Nieuwe Waterweg or the sluices in the Haringvliet Dam chose eight and six different routes, respectively, for upstream migration. Differences in current velocity in the Rhine distributaries seemed to be an important factor in the choice of migration routes.

General Overview of Turkish Sea Trout (Salmo truttaL.) Populations

“…It has been reported from other countries that sea trout can home accurately to their natal streams to spawn (e.g. Armstrong & Herbert, 1997;Bij De Vaate et al, 2003). According to Aarestrup & Jepsen (1998), in the Black Sea basin, the large freshwater discharge of some rivers may attract mature sea trout from other populations.…”

Prognose visstand in en rond het Haringvliet na invoering van het Kierbesluit in 2018

“…Het zoute water verdeelt zich nooit evenredig over een estuarium. Menging van het zoute en zoete water zal met een Kier en de bestaande structuren dan ook beperkt van omvang zijn (Jacobs et al 2003 Vaate et al 2003). Dit soort kennis is geheel niet beschikbaar voor kleine diadrome vissen.…”

Fish migration river monitoring plan : Monitoring program on the effectiveness of the FMR at Kornwerderzand

“…In this report two sophisticated systems are proposed that can either be used separately or complementary. Both systems have been proven to be effective at this study site (De Vaate et al 2003). Both systems can be used to answer Q1, passage efficiency.…”

“…In addition to these, there is an intensive array of 60 stations in the catchment areas of the Meuse and Rhine basin (De Vaate et al 2003). It is preferred to install detection stations on the outside, i.e.…”

“…Passage success of sea trout alongside the two sluice complexes in the Afsluitdijk was assessed using RFID inductive coupling telemetry (NEDAP system), where based on 70 tagged sea trout at least 47 % successfully entered Lake IJsselmeer in the current situation (De Vaate et al 2003). Passage success of sea lamprey (Petromyzon marinus) was indicated to be 16-33% based on passage behaviour of 25 sea lampreys ).…”