Prediction of larval viability based on egg quality parameters and early cleavage patterns in the experiments of triploidy induction in Atlantic cod, Gadus morhua L.
Abnormal blastomere morphology may be indicative of low egg viability in fish and therefore represent a useful tool for rapid qualitative assessments for commercial and experimental aquaculture purposes. This work reviews the literature on this subject, and compares early cleavage patterns in a seri...
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Universitetet i Tromsø
2005
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Online Access: | https://hdl.handle.net/10037/294 |
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ftunivtroemsoe:oai:munin.uit.no:10037/294 2024-06-02T08:03:10+00:00 Prediction of larval viability based on egg quality parameters and early cleavage patterns in the experiments of triploidy induction in Atlantic cod, Gadus morhua L. Rani, Manira Sultana 2005-05-27 1650337 bytes application/pdf https://hdl.handle.net/10037/294 eng eng Universitetet i Tromsø University of Tromsø https://hdl.handle.net/10037/294 URN:NBN:no-uit_munin_144 openAccess Copyright 2005 The Author(s) VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Embryologi: 482 Master thesis Mastergradsoppgave 2005 ftunivtroemsoe 2024-05-07T08:40:37Z Abnormal blastomere morphology may be indicative of low egg viability in fish and therefore represent a useful tool for rapid qualitative assessments for commercial and experimental aquaculture purposes. This work reviews the literature on this subject, and compares early cleavage patterns in a series of preliminary experiments of triploidy induction in Atlantic cod, Gadus morhua. Data from 4 different egg batches showed that cleavage abnormalities were generally higher in cold-shocked groups than control groups, though significantly only in 2 out of 4 experiments. Cell asymmetry was the most common type of cleavage abnormality in all trials, whereas other patterns such as complete separation of blastomeres or cell asymmetry combined with unequal blastomere size were observed in some of the experiments only. There was no significant difference between control and treated groups in terms of survival at any of the developmental stages in all batches. Proportions of abnormal blastomeres were negatively correlated with survival at day 1 while no correlations were observed at embryonation or hatching. This work shows that cold shock treatments applied shortly after fertilization may significantly increase, in some cases, the number of cleavage abnormalities but without affecting general survival at hatching. This would indicate that cleavage patterns abnormalities may not be considered as a good indicator of egg larval viability in such experiments. Master Thesis atlantic cod Gadus morhua University of Tromsø: Munin Open Research Archive |
institution |
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University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Embryologi: 482 |
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VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Embryologi: 482 Rani, Manira Sultana Prediction of larval viability based on egg quality parameters and early cleavage patterns in the experiments of triploidy induction in Atlantic cod, Gadus morhua L. |
topic_facet |
VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Embryologi: 482 |
description |
Abnormal blastomere morphology may be indicative of low egg viability in fish and therefore represent a useful tool for rapid qualitative assessments for commercial and experimental aquaculture purposes. This work reviews the literature on this subject, and compares early cleavage patterns in a series of preliminary experiments of triploidy induction in Atlantic cod, Gadus morhua. Data from 4 different egg batches showed that cleavage abnormalities were generally higher in cold-shocked groups than control groups, though significantly only in 2 out of 4 experiments. Cell asymmetry was the most common type of cleavage abnormality in all trials, whereas other patterns such as complete separation of blastomeres or cell asymmetry combined with unequal blastomere size were observed in some of the experiments only. There was no significant difference between control and treated groups in terms of survival at any of the developmental stages in all batches. Proportions of abnormal blastomeres were negatively correlated with survival at day 1 while no correlations were observed at embryonation or hatching. This work shows that cold shock treatments applied shortly after fertilization may significantly increase, in some cases, the number of cleavage abnormalities but without affecting general survival at hatching. This would indicate that cleavage patterns abnormalities may not be considered as a good indicator of egg larval viability in such experiments. |
format |
Master Thesis |
author |
Rani, Manira Sultana |
author_facet |
Rani, Manira Sultana |
author_sort |
Rani, Manira Sultana |
title |
Prediction of larval viability based on egg quality parameters and early cleavage patterns in the experiments of triploidy induction in Atlantic cod, Gadus morhua L. |
title_short |
Prediction of larval viability based on egg quality parameters and early cleavage patterns in the experiments of triploidy induction in Atlantic cod, Gadus morhua L. |
title_full |
Prediction of larval viability based on egg quality parameters and early cleavage patterns in the experiments of triploidy induction in Atlantic cod, Gadus morhua L. |
title_fullStr |
Prediction of larval viability based on egg quality parameters and early cleavage patterns in the experiments of triploidy induction in Atlantic cod, Gadus morhua L. |
title_full_unstemmed |
Prediction of larval viability based on egg quality parameters and early cleavage patterns in the experiments of triploidy induction in Atlantic cod, Gadus morhua L. |
title_sort |
prediction of larval viability based on egg quality parameters and early cleavage patterns in the experiments of triploidy induction in atlantic cod, gadus morhua l. |
publisher |
Universitetet i Tromsø |
publishDate |
2005 |
url |
https://hdl.handle.net/10037/294 |
genre |
atlantic cod Gadus morhua |
genre_facet |
atlantic cod Gadus morhua |
op_relation |
https://hdl.handle.net/10037/294 URN:NBN:no-uit_munin_144 |
op_rights |
openAccess Copyright 2005 The Author(s) |
_version_ |
1800747640101535744 |