Tracking anadromous fish over successive freshwater migrations reveals the influence of tagging effect, previous success, and abiotic factors on upstream passage over barriers
Authors: Davies, P., Robert Britton, J., Castro-Santos, T., Crundwell, C., Dodd, J.R., Nunn, A.D., Velterop, R. and Bolland, J.D.
Journal: Canadian Journal of Fisheries and Aquatic Sciences
Volume: 80
Issue: 7
Pages: 1110-1125
eISSN: 1205-7533
ISSN: 0706-652X
DOI: 10.1139/cjfas-2022-0196
Abstract:Predicting and mitigating the impact of anthropogenic barriers onmigratory fish requires an understanding of the individual and environmental factors that influence barrier passage. Here, the upstream spawning migrations of iteroparous twaite shad Alosa fallax were investigated over three successive spawning migrations in a highly fragmented river basin using passive acoustic telemetry (n = 184). More fish approached and passed barriers in the lower river reaches than further upstream, with the median cumulative weir passage time of 4.6 (1.8-9.2) days representing 18% of their time in the river. Returning fish in their second year had significantly higher weir passage rates than in their tagging year, with passage rates also positively influenced by previous passage success. Higher water temperatures and river levels also had positive impacts on passage rates. Lower weir passage rates by newly tagged individuals suggest that reliance on within-year passage estimates in telemetry-based barrier impact assessments could result in conservative results, while the higher passage rates of previously successful versus unsuccessful individuals suggest a conserved motivation and/or inherent ability to pass barriers.
https://eprints.bournemouth.ac.uk/38512/
Source: Scopus
Tracking anadromous fish over successive freshwater migrations reveals the influence of tagging effect, previous success, and abiotic factors on upstream passage over barriers
Authors: Davies, P., Britton, J.R., Castro-Santos, T., Crundwell, C., Dodd, J.R., Nunn, A.D., Velterop, R. and Bolland, J.D.
Journal: CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES
Volume: 80
Issue: 7
Pages: 1110-1125
eISSN: 1205-7533
ISSN: 0706-652X
DOI: 10.1139/cjfas-2022-0196
https://eprints.bournemouth.ac.uk/38512/
Source: Web of Science (Lite)
Tracking anadromous fish over successive freshwater migrations reveals the influence of tagging effect, previous success and abiotic factors on upstream passage over barriers
Authors: Davies, P., Britton, J., Castro-Santos, T., Crundwell, C., Dodd, J., Nunn, A., Velterop, R. and Bolland, J.
Journal: Canadian Journal of Fisheries and Aquatic Sciences
Publisher: NRC Research Press
ISSN: 0706-652X
DOI: 10.1139/cjfas-2022-0196
Abstract:Predicting and mitigating the impact of anthropogenic barriers on migratory fish requires an understanding of the individual and environmental factors that influence barrier passage. Here, the upstream spawning migrations of iteroparous twaite shad Alosa fallax were investigated over three successive spawning migrations in a highly fragmented river basin using passive acoustic telemetry (n=184). More fish approached and passed barriers in the lower river reaches than further upstream, with the median cumulative weir passage time (IQR) of 4.6 (1.8 - 9.2) days representing 18% of their time in river. Returning fish in their second year had significantly higher weir passage rates than in their tagging year, with passage rates also positively influenced by previous passage success. Higher water temperature and river level also had positive impacts on passage rates. Lower weir passage rates by newly tagged individuals suggests that reliance on within-year passage estimates in telemetry-based barrier impact assessments could result in conservative results, while higher passage rates of previously successful versus unsuccessful individuals suggests a conserved motivation and/or inherent ability to pass barriers.
https://eprints.bournemouth.ac.uk/38512/
Source: Manual
Tracking anadromous fish over successive freshwater migrations reveals the influence of tagging effect, previous success and abiotic factors on upstream passage over barriers
Authors: Davies, P., Britton, J.R., Castro-Santos, T., Crundwell, C., Dodd, J.R., Nunn, A.D., Velterop, R. and Bolland, J.D.
Journal: Canadian Journal of Fisheries and Aquatic Sciences
Volume: 80
Issue: 7
Pages: 1110-1125
Publisher: NRC Research Press
ISSN: 0706-652X
Abstract:Predicting and mitigating the impact of anthropogenic barriers on migratory fish requires an understanding of the individual and environmental factors that influence barrier passage. Here, the upstream spawning migrations of iteroparous twaite shad Alosa fallax were investigated over three successive spawning migrations in a highly fragmented river basin using passive acoustic telemetry (n=184). More fish approached and passed barriers in the lower river reaches than further upstream, with the median cumulative weir passage time (IQR) of 4.6 (1.8 - 9.2) days representing 18% of their time in river. Returning fish in their second year had significantly higher weir passage rates than in their tagging year, with passage rates also positively influenced by previous passage success. Higher water temperature and river level also had positive impacts on passage rates. Lower weir passage rates by newly tagged individuals suggests that reliance on within-year passage estimates in telemetry-based barrier impact assessments could result in conservative results, while higher passage rates of previously successful versus unsuccessful individuals suggests a conserved motivation and/or inherent ability to pass barriers.
https://eprints.bournemouth.ac.uk/38512/
Source: BURO EPrints