Effects of Stocking Density on Growth Performance and Stress Responses of Bester and Bester ♀ × Beluga ♂ Juveniles in Recirculating Aquaculture Systems
SIMPLE SUMMARY: The disappearance of many wild sturgeon populations from natural waters and the high demand for sturgeon products (meat and caviar) have led to increased aquacultural production of sturgeons. The development of recirculating aquaculture systems requires the optimization of rearing te...
Published in: | Animals |
---|---|
Main Authors: | , , , , , , |
Format: | Text |
Language: | English |
Published: |
MDPI
2021
|
Subjects: | |
Online Access: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8388450/ https://doi.org/10.3390/ani11082292 |
id |
ftpubmed:oai:pubmedcentral.nih.gov:8388450 |
---|---|
record_format |
openpolar |
spelling |
ftpubmed:oai:pubmedcentral.nih.gov:8388450 2023-05-15T15:41:40+02:00 Effects of Stocking Density on Growth Performance and Stress Responses of Bester and Bester ♀ × Beluga ♂ Juveniles in Recirculating Aquaculture Systems Dediu, Lorena Docan, Angelica Crețu, Mirela Grecu, Iulia Mogodan, Alina Maereanu, Marilena Oprea, Lucian 2021-08-03 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8388450/ https://doi.org/10.3390/ani11082292 en eng MDPI http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8388450/ http://dx.doi.org/10.3390/ani11082292 © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). CC-BY Animals (Basel) Article Text 2021 ftpubmed https://doi.org/10.3390/ani11082292 2021-08-29T00:48:36Z SIMPLE SUMMARY: The disappearance of many wild sturgeon populations from natural waters and the high demand for sturgeon products (meat and caviar) have led to increased aquacultural production of sturgeons. The development of recirculating aquaculture systems requires the optimization of rearing technologies so that high stocking densities have a minimal impact on fish health. Due to the ease with which sturgeons hybridize, the optimization of sturgeon aquaculture technologies involves the identification of hybrid lines with high technological performance and high stress resistance. One of the best known hybrids is that between the beluga and the sterlet (bester). The present study aims to evaluate the hybrid obtained by crossing the bester (female) with the beluga (male) as a new candidate for the recirculating aquaculture systems. The results show better performance and better density adaptation of the bester × beluga hybrid compared with the bester hybrid. However, at higher stocking densities, a negative impact on growth performance and physiological response was observed. ABSTRACT: The study aimed to compare the growth performance and physiological responses of bester (B) and backcrossed bester ♀ × beluga ♂ (BB) in response to crowding stress under different stocking densities, as well as to establish a threshold stocking density for rearing BB in a recirculating aquaculture system (RAS) without welfare impairment. For this purpose, in the first trial (T1), B (181.15 ± 21.21 g) and BB fingerlings (181.98 ± 28.65 g) were reared in two stocking densities of 2 kg/m(2) and 4 kg/m(2) in fiberglass tanks (1 m(3)) for 6 weeks. In a parallel trial (T2), the BB hybrids (335.24 ± 39.30 g) were kept in four initial stocking densities, ranging from 5 kg/m(2) to 12 kg/m(2). The results of T1 revealed better growth indices (i.e., final mean weight, weight gain, specific growth rate) at lower stocking densities for both hybrids; however, in terms of growth performance, the BB hybrid showed better results when compared ... Text Beluga Beluga* PubMed Central (PMC) Animals 11 8 2292 |
institution |
Open Polar |
collection |
PubMed Central (PMC) |
op_collection_id |
ftpubmed |
language |
English |
topic |
Article |
spellingShingle |
Article Dediu, Lorena Docan, Angelica Crețu, Mirela Grecu, Iulia Mogodan, Alina Maereanu, Marilena Oprea, Lucian Effects of Stocking Density on Growth Performance and Stress Responses of Bester and Bester ♀ × Beluga ♂ Juveniles in Recirculating Aquaculture Systems |
topic_facet |
Article |
description |
SIMPLE SUMMARY: The disappearance of many wild sturgeon populations from natural waters and the high demand for sturgeon products (meat and caviar) have led to increased aquacultural production of sturgeons. The development of recirculating aquaculture systems requires the optimization of rearing technologies so that high stocking densities have a minimal impact on fish health. Due to the ease with which sturgeons hybridize, the optimization of sturgeon aquaculture technologies involves the identification of hybrid lines with high technological performance and high stress resistance. One of the best known hybrids is that between the beluga and the sterlet (bester). The present study aims to evaluate the hybrid obtained by crossing the bester (female) with the beluga (male) as a new candidate for the recirculating aquaculture systems. The results show better performance and better density adaptation of the bester × beluga hybrid compared with the bester hybrid. However, at higher stocking densities, a negative impact on growth performance and physiological response was observed. ABSTRACT: The study aimed to compare the growth performance and physiological responses of bester (B) and backcrossed bester ♀ × beluga ♂ (BB) in response to crowding stress under different stocking densities, as well as to establish a threshold stocking density for rearing BB in a recirculating aquaculture system (RAS) without welfare impairment. For this purpose, in the first trial (T1), B (181.15 ± 21.21 g) and BB fingerlings (181.98 ± 28.65 g) were reared in two stocking densities of 2 kg/m(2) and 4 kg/m(2) in fiberglass tanks (1 m(3)) for 6 weeks. In a parallel trial (T2), the BB hybrids (335.24 ± 39.30 g) were kept in four initial stocking densities, ranging from 5 kg/m(2) to 12 kg/m(2). The results of T1 revealed better growth indices (i.e., final mean weight, weight gain, specific growth rate) at lower stocking densities for both hybrids; however, in terms of growth performance, the BB hybrid showed better results when compared ... |
format |
Text |
author |
Dediu, Lorena Docan, Angelica Crețu, Mirela Grecu, Iulia Mogodan, Alina Maereanu, Marilena Oprea, Lucian |
author_facet |
Dediu, Lorena Docan, Angelica Crețu, Mirela Grecu, Iulia Mogodan, Alina Maereanu, Marilena Oprea, Lucian |
author_sort |
Dediu, Lorena |
title |
Effects of Stocking Density on Growth Performance and Stress Responses of Bester and Bester ♀ × Beluga ♂ Juveniles in Recirculating Aquaculture Systems |
title_short |
Effects of Stocking Density on Growth Performance and Stress Responses of Bester and Bester ♀ × Beluga ♂ Juveniles in Recirculating Aquaculture Systems |
title_full |
Effects of Stocking Density on Growth Performance and Stress Responses of Bester and Bester ♀ × Beluga ♂ Juveniles in Recirculating Aquaculture Systems |
title_fullStr |
Effects of Stocking Density on Growth Performance and Stress Responses of Bester and Bester ♀ × Beluga ♂ Juveniles in Recirculating Aquaculture Systems |
title_full_unstemmed |
Effects of Stocking Density on Growth Performance and Stress Responses of Bester and Bester ♀ × Beluga ♂ Juveniles in Recirculating Aquaculture Systems |
title_sort |
effects of stocking density on growth performance and stress responses of bester and bester ♀ × beluga ♂ juveniles in recirculating aquaculture systems |
publisher |
MDPI |
publishDate |
2021 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8388450/ https://doi.org/10.3390/ani11082292 |
genre |
Beluga Beluga* |
genre_facet |
Beluga Beluga* |
op_source |
Animals (Basel) |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8388450/ http://dx.doi.org/10.3390/ani11082292 |
op_rights |
© 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3390/ani11082292 |
container_title |
Animals |
container_volume |
11 |
container_issue |
8 |
container_start_page |
2292 |
_version_ |
1766374565060018176 |