Effects of Stocking Density on Growth Performance and Stress Responses of Bester and Bester ♀ × Beluga ♂ Juveniles in Recirculating Aquaculture Systems
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 s...
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MDPI AG
2021
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ftdoajarticles:oai:doaj.org/article:041a3ec05ddb4481a958731223a17b02 2023-05-15T15:41:48+02:00 Effects of Stocking Density on Growth Performance and Stress Responses of Bester and Bester ♀ × Beluga ♂ Juveniles in Recirculating Aquaculture Systems Lorena Dediu Angelica Docan Mirela Crețu Iulia Grecu Alina Mogodan Marilena Maereanu Lucian Oprea 2021-08-01T00:00:00Z https://doi.org/10.3390/ani11082292 https://doaj.org/article/041a3ec05ddb4481a958731223a17b02 EN eng MDPI AG https://www.mdpi.com/2076-2615/11/8/2292 https://doaj.org/toc/2076-2615 doi:10.3390/ani11082292 2076-2615 https://doaj.org/article/041a3ec05ddb4481a958731223a17b02 Animals, Vol 11, Iss 2292, p 2292 (2021) stocking density hybrid sturgeons overcrowding stress physiological response RAS serum parameters Veterinary medicine SF600-1100 Zoology QL1-991 article 2021 ftdoajarticles https://doi.org/10.3390/ani11082292 2022-12-31T07:16:37Z 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 with the B hybrid. BB hybrids registered significantly ( p < 0.05) lower serum cortisol and MDA and higher lysozyme than B hybrids, showing higher tolerance to crowding stress. Nevertheless, at higher densities, selected serum parameters (i.e., hematological indices, cortisol, glucose, protein, malondialdehyde, lysozyme) and growth performance indices used to evaluate the hybrids indicate that high stocking density could affect the growth and welfare of BB hybrids, and that the selected serum parameters could be used as good indicators for chronic stress caused by overcrowding conditions. Article in Journal/Newspaper Beluga Beluga* Directory of Open Access Journals: DOAJ Articles Animals 11 8 2292 |
institution |
Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
stocking density hybrid sturgeons overcrowding stress physiological response RAS serum parameters Veterinary medicine SF600-1100 Zoology QL1-991 |
spellingShingle |
stocking density hybrid sturgeons overcrowding stress physiological response RAS serum parameters Veterinary medicine SF600-1100 Zoology QL1-991 Lorena Dediu Angelica Docan Mirela Crețu Iulia Grecu Alina Mogodan Marilena Maereanu Lucian Oprea Effects of Stocking Density on Growth Performance and Stress Responses of Bester and Bester ♀ × Beluga ♂ Juveniles in Recirculating Aquaculture Systems |
topic_facet |
stocking density hybrid sturgeons overcrowding stress physiological response RAS serum parameters Veterinary medicine SF600-1100 Zoology QL1-991 |
description |
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 with the B hybrid. BB hybrids registered significantly ( p < 0.05) lower serum cortisol and MDA and higher lysozyme than B hybrids, showing higher tolerance to crowding stress. Nevertheless, at higher densities, selected serum parameters (i.e., hematological indices, cortisol, glucose, protein, malondialdehyde, lysozyme) and growth performance indices used to evaluate the hybrids indicate that high stocking density could affect the growth and welfare of BB hybrids, and that the selected serum parameters could be used as good indicators for chronic stress caused by overcrowding conditions. |
format |
Article in Journal/Newspaper |
author |
Lorena Dediu Angelica Docan Mirela Crețu Iulia Grecu Alina Mogodan Marilena Maereanu Lucian Oprea |
author_facet |
Lorena Dediu Angelica Docan Mirela Crețu Iulia Grecu Alina Mogodan Marilena Maereanu Lucian Oprea |
author_sort |
Lorena Dediu |
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 AG |
publishDate |
2021 |
url |
https://doi.org/10.3390/ani11082292 https://doaj.org/article/041a3ec05ddb4481a958731223a17b02 |
genre |
Beluga Beluga* |
genre_facet |
Beluga Beluga* |
op_source |
Animals, Vol 11, Iss 2292, p 2292 (2021) |
op_relation |
https://www.mdpi.com/2076-2615/11/8/2292 https://doaj.org/toc/2076-2615 doi:10.3390/ani11082292 2076-2615 https://doaj.org/article/041a3ec05ddb4481a958731223a17b02 |
op_doi |
https://doi.org/10.3390/ani11082292 |
container_title |
Animals |
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11 |
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8 |
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2292 |
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1766374696303984640 |