The effect of cormorant predation on newly established Atlantic salmon population
This study aimed to describe the effect of cormorant predation on newly established Atlantic salmon, Salmo salar, population in three nursery streams in the upper Elbe River basin (Czech Republic). Salmon have been annually stocked into the nursery streams since 1998 as part of a salmon reintroducti...
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ftczechacademysc:oai:kramerius.lib.cas.cz:uuid:f715bf37-7f83-4c63-b797-c5029e6f5738 2024-03-17T08:56:49+00:00 The effect of cormorant predation on newly established Atlantic salmon population Lyach, Roman Čech, Martin média svazek https://kramerius.lib.cas.cz/view/uuid:f715bf37-7f83-4c63-b797-c5029e6f5738 https://doi.org/10.25225/fozo.v66.i3.a4.2017 unknown https://kramerius.lib.cas.cz/view/uuid:f715bf37-7f83-4c63-b797-c5029e6f5738 doi:10.25225/fozo.v66.i3.a4.2017 policy:public fish reintroduction hatchery-reared fish pharyngeal bones Salmo salar Salmon 2000 the upper Elbe River basin model:article ftczechacademysc https://doi.org/10.25225/fozo.v66.i3.a4.2017 2024-02-19T23:31:33Z This study aimed to describe the effect of cormorant predation on newly established Atlantic salmon, Salmo salar, population in three nursery streams in the upper Elbe River basin (Czech Republic). Salmon have been annually stocked into the nursery streams since 1998 as part of a salmon reintroduction programme. Salmon parr density in nursery streams was 3–81 fish per 100 m2. Only thirteen adult salmon were observed in the study area during two years of research. Altogether 912 cormorant pellets were collected, 5482 diagnostic bones were analysed, and 3915 fish were identified in the diet. Cormorant diet was composed of 24 fish species from six families but no salmon were consumed. The salmon stocking programme produces a reasonable amount of smolts but return rates of adults are very low. The cause of low return rates is not cormorant predation on nursery streams but, most likely, a low survival rate on the passage downstream. We suggest that more studies should focus on monitoring of survival and return rates of salmon in the upper River Elbe to ensure that, in the future, the salmon reintroduction programme will be really successful. Article in Journal/Newspaper Atlantic salmon Salmo salar Czech Academy of Sciences: dKNAV Folia Zoologica 66 3 167 174 |
institution |
Open Polar |
collection |
Czech Academy of Sciences: dKNAV |
op_collection_id |
ftczechacademysc |
language |
unknown |
topic |
fish reintroduction hatchery-reared fish pharyngeal bones Salmo salar Salmon 2000 the upper Elbe River basin |
spellingShingle |
fish reintroduction hatchery-reared fish pharyngeal bones Salmo salar Salmon 2000 the upper Elbe River basin Lyach, Roman Čech, Martin The effect of cormorant predation on newly established Atlantic salmon population |
topic_facet |
fish reintroduction hatchery-reared fish pharyngeal bones Salmo salar Salmon 2000 the upper Elbe River basin |
description |
This study aimed to describe the effect of cormorant predation on newly established Atlantic salmon, Salmo salar, population in three nursery streams in the upper Elbe River basin (Czech Republic). Salmon have been annually stocked into the nursery streams since 1998 as part of a salmon reintroduction programme. Salmon parr density in nursery streams was 3–81 fish per 100 m2. Only thirteen adult salmon were observed in the study area during two years of research. Altogether 912 cormorant pellets were collected, 5482 diagnostic bones were analysed, and 3915 fish were identified in the diet. Cormorant diet was composed of 24 fish species from six families but no salmon were consumed. The salmon stocking programme produces a reasonable amount of smolts but return rates of adults are very low. The cause of low return rates is not cormorant predation on nursery streams but, most likely, a low survival rate on the passage downstream. We suggest that more studies should focus on monitoring of survival and return rates of salmon in the upper River Elbe to ensure that, in the future, the salmon reintroduction programme will be really successful. |
format |
Article in Journal/Newspaper |
author |
Lyach, Roman Čech, Martin |
author_facet |
Lyach, Roman Čech, Martin |
author_sort |
Lyach, Roman |
title |
The effect of cormorant predation on newly established Atlantic salmon population |
title_short |
The effect of cormorant predation on newly established Atlantic salmon population |
title_full |
The effect of cormorant predation on newly established Atlantic salmon population |
title_fullStr |
The effect of cormorant predation on newly established Atlantic salmon population |
title_full_unstemmed |
The effect of cormorant predation on newly established Atlantic salmon population |
title_sort |
effect of cormorant predation on newly established atlantic salmon population |
url |
https://kramerius.lib.cas.cz/view/uuid:f715bf37-7f83-4c63-b797-c5029e6f5738 https://doi.org/10.25225/fozo.v66.i3.a4.2017 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_relation |
https://kramerius.lib.cas.cz/view/uuid:f715bf37-7f83-4c63-b797-c5029e6f5738 doi:10.25225/fozo.v66.i3.a4.2017 |
op_rights |
policy:public |
op_doi |
https://doi.org/10.25225/fozo.v66.i3.a4.2017 |
container_title |
Folia Zoologica |
container_volume |
66 |
container_issue |
3 |
container_start_page |
167 |
op_container_end_page |
174 |
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1793765695971917824 |