2016
 

Investigating the phenology of seaward migration of juvenile brown trout (Salmo trutta) in two European populations

År: 2016

Investigating the phenology of seaward migration of juvenile brown trout (Salmo trutta) in two European populations

Winter, E. R., Tummers, J. S., Aarestrup, K., Baktoft, H. & Lucas, M. C. 2016 In : Journal of Applied Phycology.

Publication: Research - peer-reviewJournal article – Annual report year: 2016

Recent evidence supports the existence of a downstream autumn-migratory phenotype in juvenile anadromous brown trout (Salmo trutta), however
the precise timing, extent and ecological significance of such behaviour remains ambiguous. We investigated the phenology of downstream migration of wild
juvenile trout using passive integrated transponder (PIT) telemetry over an eight-month period in two European rivers; the River Deerness, north-east England, and the River Villestrup, Denmark. The incidence of autumn–winter seaward migration was greater in the Deerness than the Villestrup, with at
least 46% of migrating juveniles detected prior to spring smoltification in the Deerness. Timing of migration was strongly regulated by factors associated
with river discharge in both systems. While autumn and spring downstream migrants did not differ in size at the time of tagging in either system, evidence that spring migrants were of better condition, travelled faster (autumn: 11.0 km day-1; spring: 24.3 km day-1) and were more likely to leave the Deerness suggests that autumn and spring migrant conspecifics respond to different behavioural motivations. Further investigation into the sex of autumn
migrant juveniles, as well as the temporal and geographical variability in the incidence and fitness consequences of autumn emigration by juvenile trout
would be beneficial
Original languageEnglish
JournalJournal of Applied Phycology
ISSN0921-8971
DOIs
StateE-pub ahead of print - 2016

 

DTU sætter mærker på brakvandsgedder

År: 2016

DTU sætter mærker på brakvandsgedder

Jacobsen, L. 2016 23, 16, Fiskeritidende

Publication: CommunicationNewspaper article – Annual report year: 2016

Original languageDanish
JournalFiskeritidende
Volume23
Issue number16
Pages (from-to)17
ISSN0909-7325
StatePublished - 2016

 

Åleudsætninger skal hjælpe bestanden: Mere end 1,5 millioner sætteål blev udsat i år

År: 2016

Åleudsætninger skal hjælpe bestanden: Mere end 1,5 millioner sætteål blev udsat i år

Pedersen, M. I. 2016 In : Fritidsfiskeren. 36, 2, p. 9-11

Publication: CommunicationJournal article – Annual report year: 2016

Original languageDanish
JournalFritidsfiskeren
Volume36
Issue number2
Pages (from-to)9-11
ISSN0906-7752
StatePublished - 2016

 

Langt fremme med produktion af åleyngel i Hirtshals

År: 2016

Langt fremme med produktion af åleyngel i Hirtshals

Tomkiewicz, J. 2016 In : Fritidsfiskeren. 36, 2, p. 6-8

Publication: CommunicationJournal article – Annual report year: 2016

Original languageDanish
JournalFritidsfiskeren
Volume36
Issue number2
Pages (from-to)6-8
ISSN0906-7752
StatePublished - 2016