Preliminary Study on Hatching of Rotifers (Brachionus plicatilis) and Copepods (Cyclopoida): Response to Flooding and Organic Fertilisation
Key words: rotifers, copepods, mesocosm, hatching, flooding and fertilisation The effect of water flooding, organic fertiliser application and salinity manipulation in stimulating the hatching of rotifer resting eggs was investigated during the dry season (in August/September 1999) in simulation tan...
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Western Indian Ocean Journal of Marine Science
2005
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ftjafricanj:oai:ojs.ajol.info:article/28448 2023-05-15T18:49:39+02:00 Preliminary Study on Hatching of Rotifers (Brachionus plicatilis) and Copepods (Cyclopoida): Response to Flooding and Organic Fertilisation MS Kyewalyanga AW Mwandya A Valdenberg 2005-03-31 application/pdf http://ajol.info/index.php/wiojms/article/view/28448 en eng Western Indian Ocean Journal of Marine Science http://ajol.info/index.php/wiojms/article/view/28448 Western Indian Ocean Journal of Marine Science; Vol 3, No 1 (2004); 79-86 rotifers copepods mesocosm hatching flooding and fertilisation Peer-reviewed Article 2005 ftjafricanj 2010-01-05T09:26:41Z Key words: rotifers, copepods, mesocosm, hatching, flooding and fertilisation The effect of water flooding, organic fertiliser application and salinity manipulation in stimulating the hatching of rotifer resting eggs was investigated during the dry season (in August/September 1999) in simulation tanks and earthen ponds at Makoba, Zanzibar, . The majority of hatched zooplankton included rotifers, identified as Brachionus plicatilis, and other zooplankton such as copepods and protozoa were present in small numbers. The number of rotifers hatched in simulation treatments with low salinity was higher than the values in treatments containing undiluted seawater. Up to 22 ±1.5 (mean ±SE) rotifers/ml were counted in treatments with low salinity, whereas only a maximum of 13 ±1. rotifers/ml were found in high-salinity treatments. On the other hand, although salinity in earthen ponds was similar (3233), the ponds flooded and fertilised with chicken manure yielded significantly more rotifers (26 ±1 / ml), compared to a maximum of only 8 ±0.5 rotifers/ml counted in the control unfertilised pond. These results suggest that it is possible to induce hatching and production of rotifers by manipulating salinity and fertility of ponds. The reared rotifers can be harvested and used to feed finfish larvae elsewhere. Western Indian Ocean Journal of Marine Science Vol.3(1) 2004: 79-86 Article in Journal/Newspaper Copepods Rotifer AJOL - African Journals Online Indian |
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Open Polar |
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AJOL - African Journals Online |
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ftjafricanj |
language |
English |
topic |
rotifers copepods mesocosm hatching flooding and fertilisation |
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rotifers copepods mesocosm hatching flooding and fertilisation MS Kyewalyanga AW Mwandya A Valdenberg Preliminary Study on Hatching of Rotifers (Brachionus plicatilis) and Copepods (Cyclopoida): Response to Flooding and Organic Fertilisation |
topic_facet |
rotifers copepods mesocosm hatching flooding and fertilisation |
description |
Key words: rotifers, copepods, mesocosm, hatching, flooding and fertilisation The effect of water flooding, organic fertiliser application and salinity manipulation in stimulating the hatching of rotifer resting eggs was investigated during the dry season (in August/September 1999) in simulation tanks and earthen ponds at Makoba, Zanzibar, . The majority of hatched zooplankton included rotifers, identified as Brachionus plicatilis, and other zooplankton such as copepods and protozoa were present in small numbers. The number of rotifers hatched in simulation treatments with low salinity was higher than the values in treatments containing undiluted seawater. Up to 22 ±1.5 (mean ±SE) rotifers/ml were counted in treatments with low salinity, whereas only a maximum of 13 ±1. rotifers/ml were found in high-salinity treatments. On the other hand, although salinity in earthen ponds was similar (3233), the ponds flooded and fertilised with chicken manure yielded significantly more rotifers (26 ±1 / ml), compared to a maximum of only 8 ±0.5 rotifers/ml counted in the control unfertilised pond. These results suggest that it is possible to induce hatching and production of rotifers by manipulating salinity and fertility of ponds. The reared rotifers can be harvested and used to feed finfish larvae elsewhere. Western Indian Ocean Journal of Marine Science Vol.3(1) 2004: 79-86 |
format |
Article in Journal/Newspaper |
author |
MS Kyewalyanga AW Mwandya A Valdenberg |
author_facet |
MS Kyewalyanga AW Mwandya A Valdenberg |
author_sort |
MS Kyewalyanga |
title |
Preliminary Study on Hatching of Rotifers (Brachionus plicatilis) and Copepods (Cyclopoida): Response to Flooding and Organic Fertilisation |
title_short |
Preliminary Study on Hatching of Rotifers (Brachionus plicatilis) and Copepods (Cyclopoida): Response to Flooding and Organic Fertilisation |
title_full |
Preliminary Study on Hatching of Rotifers (Brachionus plicatilis) and Copepods (Cyclopoida): Response to Flooding and Organic Fertilisation |
title_fullStr |
Preliminary Study on Hatching of Rotifers (Brachionus plicatilis) and Copepods (Cyclopoida): Response to Flooding and Organic Fertilisation |
title_full_unstemmed |
Preliminary Study on Hatching of Rotifers (Brachionus plicatilis) and Copepods (Cyclopoida): Response to Flooding and Organic Fertilisation |
title_sort |
preliminary study on hatching of rotifers (brachionus plicatilis) and copepods (cyclopoida): response to flooding and organic fertilisation |
publisher |
Western Indian Ocean Journal of Marine Science |
publishDate |
2005 |
url |
http://ajol.info/index.php/wiojms/article/view/28448 |
geographic |
Indian |
geographic_facet |
Indian |
genre |
Copepods Rotifer |
genre_facet |
Copepods Rotifer |
op_source |
Western Indian Ocean Journal of Marine Science; Vol 3, No 1 (2004); 79-86 |
op_relation |
http://ajol.info/index.php/wiojms/article/view/28448 |
_version_ |
1766243260264611840 |