Population dynamics and production of estuarine planktonic rotifers in the Southern Baltic: Brachionus quadridentatus (Hermann, 1783)
Population dynamics and production of a natural population of Brachionus quadridentatus were studied by regular field sampling at a routine station in the shallow Darss-Zingst estuary (3-7%o salinity), Southern Baltic, for two successive years. Investigations included observations of hatched resting...
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Pensoft Publishers
1991
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ftdoajarticles:oai:doaj.org/article:7f70f3bbfafc4f54aeda34070624e27e 2023-05-15T18:49:42+02:00 Population dynamics and production of estuarine planktonic rotifers in the Southern Baltic: Brachionus quadridentatus (Hermann, 1783) H. Arndt 1991-12-01T00:00:00Z https://doi.org/10.3750/AIP1991.21.S.01 https://doaj.org/article/7f70f3bbfafc4f54aeda34070624e27e EN eng Pensoft Publishers https://aiep.pensoft.net/article/25264/download/pdf/ https://aiep.pensoft.net/article/25264/download/xml/ https://aiep.pensoft.net/article/25264/ https://doaj.org/toc/1734-1515 doi:10.3750/AIP1991.21.S.01 1734-1515 https://doaj.org/article/7f70f3bbfafc4f54aeda34070624e27e Acta Ichthyologica et Piscatoria, Vol 21, Iss S, Pp 7-15 (1991) Aquaculture. Fisheries. Angling SH1-691 article 1991 ftdoajarticles https://doi.org/10.3750/AIP1991.21.S.01 2022-12-30T23:16:45Z Population dynamics and production of a natural population of Brachionus quadridentatus were studied by regular field sampling at a routine station in the shallow Darss-Zingst estuary (3-7%o salinity), Southern Baltic, for two successive years. Investigations included observations of hatched resting eggs, abundance of amictic and mictic females, egg ratio, resting egg production, and mixis rate. Using egg development times from literature, instantaneous rates of growth, birth and death rates were estimated. Mixis rates increased with increasing productivity. The mean P/B value for the growth seasons was 0.89/d and the corresponding production was 9.0 mg wet weight/dm3a. Significant parasitism by microsporidians was observed during one year when up to 12% of the females were infected during June/July. B. quadridentatus served as a food source for the rotifer Asplanchna girodi, the mysid Neomysis integer, and fish juveniles. Copepods could also be considered as predators. However, on an annual basis predators seemed to be of reduced importance and the population dynamics were governed mainly by autoregulative processes. Article in Journal/Newspaper Copepods Rotifer Directory of Open Access Journals: DOAJ Articles Acta Ichthyologica et Piscatoria 21 S 7 15 |
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Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Aquaculture. Fisheries. Angling SH1-691 |
spellingShingle |
Aquaculture. Fisheries. Angling SH1-691 H. Arndt Population dynamics and production of estuarine planktonic rotifers in the Southern Baltic: Brachionus quadridentatus (Hermann, 1783) |
topic_facet |
Aquaculture. Fisheries. Angling SH1-691 |
description |
Population dynamics and production of a natural population of Brachionus quadridentatus were studied by regular field sampling at a routine station in the shallow Darss-Zingst estuary (3-7%o salinity), Southern Baltic, for two successive years. Investigations included observations of hatched resting eggs, abundance of amictic and mictic females, egg ratio, resting egg production, and mixis rate. Using egg development times from literature, instantaneous rates of growth, birth and death rates were estimated. Mixis rates increased with increasing productivity. The mean P/B value for the growth seasons was 0.89/d and the corresponding production was 9.0 mg wet weight/dm3a. Significant parasitism by microsporidians was observed during one year when up to 12% of the females were infected during June/July. B. quadridentatus served as a food source for the rotifer Asplanchna girodi, the mysid Neomysis integer, and fish juveniles. Copepods could also be considered as predators. However, on an annual basis predators seemed to be of reduced importance and the population dynamics were governed mainly by autoregulative processes. |
format |
Article in Journal/Newspaper |
author |
H. Arndt |
author_facet |
H. Arndt |
author_sort |
H. Arndt |
title |
Population dynamics and production of estuarine planktonic rotifers in the Southern Baltic: Brachionus quadridentatus (Hermann, 1783) |
title_short |
Population dynamics and production of estuarine planktonic rotifers in the Southern Baltic: Brachionus quadridentatus (Hermann, 1783) |
title_full |
Population dynamics and production of estuarine planktonic rotifers in the Southern Baltic: Brachionus quadridentatus (Hermann, 1783) |
title_fullStr |
Population dynamics and production of estuarine planktonic rotifers in the Southern Baltic: Brachionus quadridentatus (Hermann, 1783) |
title_full_unstemmed |
Population dynamics and production of estuarine planktonic rotifers in the Southern Baltic: Brachionus quadridentatus (Hermann, 1783) |
title_sort |
population dynamics and production of estuarine planktonic rotifers in the southern baltic: brachionus quadridentatus (hermann, 1783) |
publisher |
Pensoft Publishers |
publishDate |
1991 |
url |
https://doi.org/10.3750/AIP1991.21.S.01 https://doaj.org/article/7f70f3bbfafc4f54aeda34070624e27e |
genre |
Copepods Rotifer |
genre_facet |
Copepods Rotifer |
op_source |
Acta Ichthyologica et Piscatoria, Vol 21, Iss S, Pp 7-15 (1991) |
op_relation |
https://aiep.pensoft.net/article/25264/download/pdf/ https://aiep.pensoft.net/article/25264/download/xml/ https://aiep.pensoft.net/article/25264/ https://doaj.org/toc/1734-1515 doi:10.3750/AIP1991.21.S.01 1734-1515 https://doaj.org/article/7f70f3bbfafc4f54aeda34070624e27e |
op_doi |
https://doi.org/10.3750/AIP1991.21.S.01 |
container_title |
Acta Ichthyologica et Piscatoria |
container_volume |
21 |
container_issue |
S |
container_start_page |
7 |
op_container_end_page |
15 |
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1766243309998571520 |