TRIALS OF “SHAYBA 400” INCUBATION NESTS FOR CHUM SALMON (ONCORHYNCHUS KETA) EGGS IN SMALL TRIBUTARIES TO THE MALKA RIVER (SAKHALIN ISLAND)
The outcome of a non-hatchery method for chum salmon ( Oncorhynchus keta ) reproduction is presented. The method was tested in small tributaries to Malka River (Sea of Okhotsk catchment, Tatar Strait). Specially designed incubation nests were deployed on the bottom of river stretches with rapids. Ea...
Published in: | Proceedings of the Karelian Research Centre of the Russian Academy of Sciences |
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Karelian Research Centre of the Russian Academy of Sciences
2019
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ftdoajarticles:oai:doaj.org/article:a496b9dbc9ba4b5b96c3c8155cf3dace 2023-05-15T18:09:18+02:00 TRIALS OF “SHAYBA 400” INCUBATION NESTS FOR CHUM SALMON (ONCORHYNCHUS KETA) EGGS IN SMALL TRIBUTARIES TO THE MALKA RIVER (SAKHALIN ISLAND) Denis Efremov Aleksey Veselov Mikhail Ruch’ev Mikhail Skorobogatov Lyudmila Fyodorova Alexander Madudin 2019-06-01T00:00:00Z https://doi.org/10.17076/eb1019 https://doaj.org/article/a496b9dbc9ba4b5b96c3c8155cf3dace EN RU eng rus Karelian Research Centre of the Russian Academy of Sciences http://journals.krc.karelia.ru/index.php/biology/article/view/1019 https://doaj.org/toc/1997-3217 https://doaj.org/toc/2312-4504 1997-3217 2312-4504 doi:10.17076/eb1019 https://doaj.org/article/a496b9dbc9ba4b5b96c3c8155cf3dace Transactions of the Karelian Research Centre of the Russian Academy of Sciences, Iss 6 (2019) non-hatchery incubation method chum salmon eggs nests incubators “shayba 400” incubation techniques Science Q article 2019 ftdoajarticles https://doi.org/10.17076/eb1019 2022-12-31T09:54:54Z The outcome of a non-hatchery method for chum salmon ( Oncorhynchus keta ) reproduction is presented. The method was tested in small tributaries to Malka River (Sea of Okhotsk catchment, Tatar Strait). Specially designed incubation nests were deployed on the bottom of river stretches with rapids. Each device is a streamlined flattened vessel with two layers of incubation plates with wells for individual egg. There is a water inlet in the bottom of the device to secure continuous supply of fresh water; water with embryos’ waste products is washed out of the device through an outlet tube on the top. The nest allows incubating fertilized chum salmon eggs during the winter and get viable larvae in spring, who would then either disperse across the rapid by themselves or be taken out of the devices to be post-reared in pools. The trial revealed both strengths(higher capacity for the incubated eggs –up to 404 chum salmon eggs per device, slots in the bottom of the wells preventing eggs from falling through to the underlying collection chamber during incubation but at the same time allowing the movement of larvae to the collection chamber after hatching) and structural flaws (poor water flow in the cassette installation mode, as well as flow blockage by sand clogging the water intake pipe). Overall, the hatching rate was 97.8 %. Not more than 48.7 % exited the next as larvae. Mortalities were partially due to the blockage of flow through the devices as a result of a critical drop in the water level during the winter low water period, and to the high sediment load, up to 25 cm. Losses were higher, in some devices up to 100 %, in the nests with cassette-type installation. After a minor upgrade, the device can be used to restore the numbers of chum salmon and other Pacific salmon species in small rivers. Article in Journal/Newspaper Sakhalin Directory of Open Access Journals: DOAJ Articles Keta ENVELOPE(-19.455,-19.455,65.656,65.656) Okhotsk Pacific Proceedings of the Karelian Research Centre of the Russian Academy of Sciences 6 57 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English Russian |
topic |
non-hatchery incubation method chum salmon eggs nests incubators “shayba 400” incubation techniques Science Q |
spellingShingle |
non-hatchery incubation method chum salmon eggs nests incubators “shayba 400” incubation techniques Science Q Denis Efremov Aleksey Veselov Mikhail Ruch’ev Mikhail Skorobogatov Lyudmila Fyodorova Alexander Madudin TRIALS OF “SHAYBA 400” INCUBATION NESTS FOR CHUM SALMON (ONCORHYNCHUS KETA) EGGS IN SMALL TRIBUTARIES TO THE MALKA RIVER (SAKHALIN ISLAND) |
topic_facet |
non-hatchery incubation method chum salmon eggs nests incubators “shayba 400” incubation techniques Science Q |
description |
The outcome of a non-hatchery method for chum salmon ( Oncorhynchus keta ) reproduction is presented. The method was tested in small tributaries to Malka River (Sea of Okhotsk catchment, Tatar Strait). Specially designed incubation nests were deployed on the bottom of river stretches with rapids. Each device is a streamlined flattened vessel with two layers of incubation plates with wells for individual egg. There is a water inlet in the bottom of the device to secure continuous supply of fresh water; water with embryos’ waste products is washed out of the device through an outlet tube on the top. The nest allows incubating fertilized chum salmon eggs during the winter and get viable larvae in spring, who would then either disperse across the rapid by themselves or be taken out of the devices to be post-reared in pools. The trial revealed both strengths(higher capacity for the incubated eggs –up to 404 chum salmon eggs per device, slots in the bottom of the wells preventing eggs from falling through to the underlying collection chamber during incubation but at the same time allowing the movement of larvae to the collection chamber after hatching) and structural flaws (poor water flow in the cassette installation mode, as well as flow blockage by sand clogging the water intake pipe). Overall, the hatching rate was 97.8 %. Not more than 48.7 % exited the next as larvae. Mortalities were partially due to the blockage of flow through the devices as a result of a critical drop in the water level during the winter low water period, and to the high sediment load, up to 25 cm. Losses were higher, in some devices up to 100 %, in the nests with cassette-type installation. After a minor upgrade, the device can be used to restore the numbers of chum salmon and other Pacific salmon species in small rivers. |
format |
Article in Journal/Newspaper |
author |
Denis Efremov Aleksey Veselov Mikhail Ruch’ev Mikhail Skorobogatov Lyudmila Fyodorova Alexander Madudin |
author_facet |
Denis Efremov Aleksey Veselov Mikhail Ruch’ev Mikhail Skorobogatov Lyudmila Fyodorova Alexander Madudin |
author_sort |
Denis Efremov |
title |
TRIALS OF “SHAYBA 400” INCUBATION NESTS FOR CHUM SALMON (ONCORHYNCHUS KETA) EGGS IN SMALL TRIBUTARIES TO THE MALKA RIVER (SAKHALIN ISLAND) |
title_short |
TRIALS OF “SHAYBA 400” INCUBATION NESTS FOR CHUM SALMON (ONCORHYNCHUS KETA) EGGS IN SMALL TRIBUTARIES TO THE MALKA RIVER (SAKHALIN ISLAND) |
title_full |
TRIALS OF “SHAYBA 400” INCUBATION NESTS FOR CHUM SALMON (ONCORHYNCHUS KETA) EGGS IN SMALL TRIBUTARIES TO THE MALKA RIVER (SAKHALIN ISLAND) |
title_fullStr |
TRIALS OF “SHAYBA 400” INCUBATION NESTS FOR CHUM SALMON (ONCORHYNCHUS KETA) EGGS IN SMALL TRIBUTARIES TO THE MALKA RIVER (SAKHALIN ISLAND) |
title_full_unstemmed |
TRIALS OF “SHAYBA 400” INCUBATION NESTS FOR CHUM SALMON (ONCORHYNCHUS KETA) EGGS IN SMALL TRIBUTARIES TO THE MALKA RIVER (SAKHALIN ISLAND) |
title_sort |
trials of “shayba 400” incubation nests for chum salmon (oncorhynchus keta) eggs in small tributaries to the malka river (sakhalin island) |
publisher |
Karelian Research Centre of the Russian Academy of Sciences |
publishDate |
2019 |
url |
https://doi.org/10.17076/eb1019 https://doaj.org/article/a496b9dbc9ba4b5b96c3c8155cf3dace |
long_lat |
ENVELOPE(-19.455,-19.455,65.656,65.656) |
geographic |
Keta Okhotsk Pacific |
geographic_facet |
Keta Okhotsk Pacific |
genre |
Sakhalin |
genre_facet |
Sakhalin |
op_source |
Transactions of the Karelian Research Centre of the Russian Academy of Sciences, Iss 6 (2019) |
op_relation |
http://journals.krc.karelia.ru/index.php/biology/article/view/1019 https://doaj.org/toc/1997-3217 https://doaj.org/toc/2312-4504 1997-3217 2312-4504 doi:10.17076/eb1019 https://doaj.org/article/a496b9dbc9ba4b5b96c3c8155cf3dace |
op_doi |
https://doi.org/10.17076/eb1019 |
container_title |
Proceedings of the Karelian Research Centre of the Russian Academy of Sciences |
container_issue |
6 |
container_start_page |
57 |
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1766181798782435328 |