Downstream spawning migration by the amphidromous Australian grayling (Prototroctes maraena) in a coastal river in south-eastern Australia
Understanding the reasons and cues for migration is crucial for developing effective conservation and management strategies of diadromous fishes. Spawning and movement patterns of the threatened diadromous Australian grayling (Prototroctes maraena) were investigated in the Bunyip River, Victoria, us...
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ftdeakinunifig:oai:figshare.com:article/20960977 2023-05-15T13:27:57+02:00 Downstream spawning migration by the amphidromous Australian grayling (Prototroctes maraena) in a coastal river in south-eastern Australia Wayne Michael Koster D Dawson D Crook 2013-01-01T00:00:00Z http://hdl.handle.net/10536/DRO/DU:30055286 https://figshare.com/articles/journal_contribution/Downstream_spawning_migration_by_the_amphidromous_Australian_grayling_Prototroctes_maraena_in_a_coastal_river_in_south-eastern_Australia/20960977 unknown http://hdl.handle.net/10536/DRO/DU:30055286 https://figshare.com/articles/journal_contribution/Downstream_spawning_migration_by_the_amphidromous_Australian_grayling_Prototroctes_maraena_in_a_coastal_river_in_south-eastern_Australia/20960977 All Rights Reserved Uncategorized amphidromy environmental flows reproduction retropinnidae telemetry Science & Technology Life Sciences & Biomedicine Physical Sciences Fisheries Limnology Marine & Freshwater Biology Oceanography ANGUILLA-ANGUILLA L GUNTHER SALMONIFORMES DUMMY TRANSMITTERS CLIMATE-CHANGE EELS ANGUILLA FISH MOVEMENTS EXPULSION DIADROMY STREAM Text Journal contribution 2013 ftdeakinunifig 2022-11-17T21:53:28Z Understanding the reasons and cues for migration is crucial for developing effective conservation and management strategies of diadromous fishes. Spawning and movement patterns of the threatened diadromous Australian grayling (Prototroctes maraena) were investigated in the Bunyip River, Victoria, using drift sampling (2008–2011) and acoustic telemetry (2009–2010) during the autumn–winter spawning period of each year. Fifty-five adult fish (2009: n = 21; 2010: n = 34) were tagged and released in February ~15–30 km upstream of the Bunyip River estuary. Thirteen fish (2009: n = 7; 2010: n = 6) undertook rapid downstream migrations from March to April to reaches immediately upstream of the estuary. Drifting eggs were detected at multiple sites between April and July; however, the majority (78.8%) were collected in the lower reaches within ~0.5 km of the estuary in early–mid-May. Tagged adult fish arrived in this area 1–4 weeks before eggs were detected and usually moved back upstream within 2 weeks following the peak egg abundance. Downstream migration and peak egg abundance were associated with increased river flows. Although the proportion of fish that undertook migrations was low, low rates of tag retention in this species likely account for the failure to detect migration by many of the tagged individuals. Other Non-Article Part of Journal/Newspaper Anguilla anguilla DRO - Deakin Research Online |
institution |
Open Polar |
collection |
DRO - Deakin Research Online |
op_collection_id |
ftdeakinunifig |
language |
unknown |
topic |
Uncategorized amphidromy environmental flows reproduction retropinnidae telemetry Science & Technology Life Sciences & Biomedicine Physical Sciences Fisheries Limnology Marine & Freshwater Biology Oceanography ANGUILLA-ANGUILLA L GUNTHER SALMONIFORMES DUMMY TRANSMITTERS CLIMATE-CHANGE EELS ANGUILLA FISH MOVEMENTS EXPULSION DIADROMY STREAM |
spellingShingle |
Uncategorized amphidromy environmental flows reproduction retropinnidae telemetry Science & Technology Life Sciences & Biomedicine Physical Sciences Fisheries Limnology Marine & Freshwater Biology Oceanography ANGUILLA-ANGUILLA L GUNTHER SALMONIFORMES DUMMY TRANSMITTERS CLIMATE-CHANGE EELS ANGUILLA FISH MOVEMENTS EXPULSION DIADROMY STREAM Wayne Michael Koster D Dawson D Crook Downstream spawning migration by the amphidromous Australian grayling (Prototroctes maraena) in a coastal river in south-eastern Australia |
topic_facet |
Uncategorized amphidromy environmental flows reproduction retropinnidae telemetry Science & Technology Life Sciences & Biomedicine Physical Sciences Fisheries Limnology Marine & Freshwater Biology Oceanography ANGUILLA-ANGUILLA L GUNTHER SALMONIFORMES DUMMY TRANSMITTERS CLIMATE-CHANGE EELS ANGUILLA FISH MOVEMENTS EXPULSION DIADROMY STREAM |
description |
Understanding the reasons and cues for migration is crucial for developing effective conservation and management strategies of diadromous fishes. Spawning and movement patterns of the threatened diadromous Australian grayling (Prototroctes maraena) were investigated in the Bunyip River, Victoria, using drift sampling (2008–2011) and acoustic telemetry (2009–2010) during the autumn–winter spawning period of each year. Fifty-five adult fish (2009: n = 21; 2010: n = 34) were tagged and released in February ~15–30 km upstream of the Bunyip River estuary. Thirteen fish (2009: n = 7; 2010: n = 6) undertook rapid downstream migrations from March to April to reaches immediately upstream of the estuary. Drifting eggs were detected at multiple sites between April and July; however, the majority (78.8%) were collected in the lower reaches within ~0.5 km of the estuary in early–mid-May. Tagged adult fish arrived in this area 1–4 weeks before eggs were detected and usually moved back upstream within 2 weeks following the peak egg abundance. Downstream migration and peak egg abundance were associated with increased river flows. Although the proportion of fish that undertook migrations was low, low rates of tag retention in this species likely account for the failure to detect migration by many of the tagged individuals. |
format |
Other Non-Article Part of Journal/Newspaper |
author |
Wayne Michael Koster D Dawson D Crook |
author_facet |
Wayne Michael Koster D Dawson D Crook |
author_sort |
Wayne Michael Koster |
title |
Downstream spawning migration by the amphidromous Australian grayling (Prototroctes maraena) in a coastal river in south-eastern Australia |
title_short |
Downstream spawning migration by the amphidromous Australian grayling (Prototroctes maraena) in a coastal river in south-eastern Australia |
title_full |
Downstream spawning migration by the amphidromous Australian grayling (Prototroctes maraena) in a coastal river in south-eastern Australia |
title_fullStr |
Downstream spawning migration by the amphidromous Australian grayling (Prototroctes maraena) in a coastal river in south-eastern Australia |
title_full_unstemmed |
Downstream spawning migration by the amphidromous Australian grayling (Prototroctes maraena) in a coastal river in south-eastern Australia |
title_sort |
downstream spawning migration by the amphidromous australian grayling (prototroctes maraena) in a coastal river in south-eastern australia |
publishDate |
2013 |
url |
http://hdl.handle.net/10536/DRO/DU:30055286 https://figshare.com/articles/journal_contribution/Downstream_spawning_migration_by_the_amphidromous_Australian_grayling_Prototroctes_maraena_in_a_coastal_river_in_south-eastern_Australia/20960977 |
genre |
Anguilla anguilla |
genre_facet |
Anguilla anguilla |
op_relation |
http://hdl.handle.net/10536/DRO/DU:30055286 https://figshare.com/articles/journal_contribution/Downstream_spawning_migration_by_the_amphidromous_Australian_grayling_Prototroctes_maraena_in_a_coastal_river_in_south-eastern_Australia/20960977 |
op_rights |
All Rights Reserved |
_version_ |
1766401330012749824 |