Type of hormonal treatment administered to induce vitellogenesis in European eel influences biochemical composition of eggs and yolk-sac larvae
Egg biochemical composition is among the main factors affecting offspring quality and survival during the yolk-sac stage, when larvae depend exclusively on yolk nutrients. These nutrients are primarily embedded in the developing oocytes during vitellogenesis. In aquaculture, assisted reproduction pr...
Published in: | Fish Physiology and Biochemistry |
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2022
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Online Access: | https://orbit.dtu.dk/en/publications/78d78846-ac08-4d3f-86d7-ca1c857ccd48 https://doi.org/10.1007/s10695-021-01042-4 https://backend.orbit.dtu.dk/ws/files/269721068/Benini2022_Article_TypeOfHormonalTreatmentAdminis.pdf |
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ftdtupubl:oai:pure.atira.dk:publications/78d78846-ac08-4d3f-86d7-ca1c857ccd48 2024-09-15T17:39:43+00:00 Type of hormonal treatment administered to induce vitellogenesis in European eel influences biochemical composition of eggs and yolk-sac larvae Benini, E. Politis, S. N. Nielsen, A. Sørensen, S. R. Tomkiewicz, J. Engrola, S. 2022 application/pdf https://orbit.dtu.dk/en/publications/78d78846-ac08-4d3f-86d7-ca1c857ccd48 https://doi.org/10.1007/s10695-021-01042-4 https://backend.orbit.dtu.dk/ws/files/269721068/Benini2022_Article_TypeOfHormonalTreatmentAdminis.pdf eng eng https://orbit.dtu.dk/en/publications/78d78846-ac08-4d3f-86d7-ca1c857ccd48 info:eu-repo/semantics/openAccess Benini , E , Politis , S N , Nielsen , A , Sørensen , S R , Tomkiewicz , J & Engrola , S 2022 , ' Type of hormonal treatment administered to induce vitellogenesis in European eel influences biochemical composition of eggs and yolk-sac larvae ' , Fish Physiology & Biochemistry , vol. 48 , pp. 185-200 . https://doi.org/10.1007/s10695-021-01042-4 Assisted reproduction EFA Egg and larval quality FAA Lipids Pituitary extract Protein article 2022 ftdtupubl https://doi.org/10.1007/s10695-021-01042-4 2024-08-13T00:03:06Z Egg biochemical composition is among the main factors affecting offspring quality and survival during the yolk-sac stage, when larvae depend exclusively on yolk nutrients. These nutrients are primarily embedded in the developing oocytes during vitellogenesis. In aquaculture, assisted reproduction procedures may be applied enabling gamete production. For the European eel ( Anguilla anguilla ), reproductive treatment involves administration of pituitary extracts from carp (CPE) or salmon (SPE) to induce and sustain vitellogenesis. In the present study, we compared the influence of CPE and SPE treatments on offspring quality and composition as well as nutrient utilization during the yolk-sac stage. Thus, dry weight, proximal composition (total lipid, total protein), free amino acids, and fatty acids were assessed in eggs and larvae throughout the yolk-sac stage, where body and oil-droplet area were measured to estimate growth rate, oil-droplet utilization, and oil-droplet utilization efficiency. The results showed that CPE females spawned eggs with higher lipid and free amino acid contents. However, SPE females produced more buoyant eggs with higher fertilization rate as well as larger larvae with more energy reserves (estimated as oil-droplet area). Overall, general patterns of nutrient utilization were detected, such as the amount of total lipid and monounsaturated fatty acids decreasing from the egg stage and throughout the yolk-sac larval stage. On the contrary, essential fatty acids and free amino acids were retained. Notably, towards the end of the yolk-sac stage, the proximal composition and biometry of surviving larvae, from both treatments, were similar. Article in Journal/Newspaper Anguilla anguilla Technical University of Denmark: DTU Orbit Fish Physiology and Biochemistry 48 1 185 200 |
institution |
Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
topic |
Assisted reproduction EFA Egg and larval quality FAA Lipids Pituitary extract Protein |
spellingShingle |
Assisted reproduction EFA Egg and larval quality FAA Lipids Pituitary extract Protein Benini, E. Politis, S. N. Nielsen, A. Sørensen, S. R. Tomkiewicz, J. Engrola, S. Type of hormonal treatment administered to induce vitellogenesis in European eel influences biochemical composition of eggs and yolk-sac larvae |
topic_facet |
Assisted reproduction EFA Egg and larval quality FAA Lipids Pituitary extract Protein |
description |
Egg biochemical composition is among the main factors affecting offspring quality and survival during the yolk-sac stage, when larvae depend exclusively on yolk nutrients. These nutrients are primarily embedded in the developing oocytes during vitellogenesis. In aquaculture, assisted reproduction procedures may be applied enabling gamete production. For the European eel ( Anguilla anguilla ), reproductive treatment involves administration of pituitary extracts from carp (CPE) or salmon (SPE) to induce and sustain vitellogenesis. In the present study, we compared the influence of CPE and SPE treatments on offspring quality and composition as well as nutrient utilization during the yolk-sac stage. Thus, dry weight, proximal composition (total lipid, total protein), free amino acids, and fatty acids were assessed in eggs and larvae throughout the yolk-sac stage, where body and oil-droplet area were measured to estimate growth rate, oil-droplet utilization, and oil-droplet utilization efficiency. The results showed that CPE females spawned eggs with higher lipid and free amino acid contents. However, SPE females produced more buoyant eggs with higher fertilization rate as well as larger larvae with more energy reserves (estimated as oil-droplet area). Overall, general patterns of nutrient utilization were detected, such as the amount of total lipid and monounsaturated fatty acids decreasing from the egg stage and throughout the yolk-sac larval stage. On the contrary, essential fatty acids and free amino acids were retained. Notably, towards the end of the yolk-sac stage, the proximal composition and biometry of surviving larvae, from both treatments, were similar. |
format |
Article in Journal/Newspaper |
author |
Benini, E. Politis, S. N. Nielsen, A. Sørensen, S. R. Tomkiewicz, J. Engrola, S. |
author_facet |
Benini, E. Politis, S. N. Nielsen, A. Sørensen, S. R. Tomkiewicz, J. Engrola, S. |
author_sort |
Benini, E. |
title |
Type of hormonal treatment administered to induce vitellogenesis in European eel influences biochemical composition of eggs and yolk-sac larvae |
title_short |
Type of hormonal treatment administered to induce vitellogenesis in European eel influences biochemical composition of eggs and yolk-sac larvae |
title_full |
Type of hormonal treatment administered to induce vitellogenesis in European eel influences biochemical composition of eggs and yolk-sac larvae |
title_fullStr |
Type of hormonal treatment administered to induce vitellogenesis in European eel influences biochemical composition of eggs and yolk-sac larvae |
title_full_unstemmed |
Type of hormonal treatment administered to induce vitellogenesis in European eel influences biochemical composition of eggs and yolk-sac larvae |
title_sort |
type of hormonal treatment administered to induce vitellogenesis in european eel influences biochemical composition of eggs and yolk-sac larvae |
publishDate |
2022 |
url |
https://orbit.dtu.dk/en/publications/78d78846-ac08-4d3f-86d7-ca1c857ccd48 https://doi.org/10.1007/s10695-021-01042-4 https://backend.orbit.dtu.dk/ws/files/269721068/Benini2022_Article_TypeOfHormonalTreatmentAdminis.pdf |
genre |
Anguilla anguilla |
genre_facet |
Anguilla anguilla |
op_source |
Benini , E , Politis , S N , Nielsen , A , Sørensen , S R , Tomkiewicz , J & Engrola , S 2022 , ' Type of hormonal treatment administered to induce vitellogenesis in European eel influences biochemical composition of eggs and yolk-sac larvae ' , Fish Physiology & Biochemistry , vol. 48 , pp. 185-200 . https://doi.org/10.1007/s10695-021-01042-4 |
op_relation |
https://orbit.dtu.dk/en/publications/78d78846-ac08-4d3f-86d7-ca1c857ccd48 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1007/s10695-021-01042-4 |
container_title |
Fish Physiology and Biochemistry |
container_volume |
48 |
container_issue |
1 |
container_start_page |
185 |
op_container_end_page |
200 |
_version_ |
1810482121588867072 |