Tolerance response to water pH in larvae of two marine fish species, gilthead seabream, Sparus aurata (L.) and Senegal sole, Solea senegalensis (Kaup), during development

2002 ◽  
Vol 33 (10) ◽  
pp. 747-752 ◽  
Author(s):  
G Parra ◽  
M Yúfera
2020 ◽  
Author(s):  
Sébastien Alfonso ◽  
Walter Zupa ◽  
Amedeo Manfrin ◽  
Eleonora Fiocchi ◽  
Maria Dioguardi ◽  
...  

Abstract Background: Telemetry applied to aquatic organisms has recently developed greatly. Physiological sensors have been increasingly used as tools for fish welfare monitoring. However, for the technology to be used as a reliable non-invasive welfare indicator, it is important that the tagging procedure does not disrupt fish physiology, behaviour and performance. In this communication, we share our medium-term data on stress physiological profile and growth performance after tag implantation in two important marine fish species for European aquaculture, the sea bream ( Sparus aurata ) and the European sea bass ( Dicentrarchus labrax ). Results: Blood samples after tag implantation (46 days for the sea bream and 95 days for the sea bass) revealed no differences between tagged and untagged fish in cortisol, glucose and lactate levels, suggesting that the tag implantation does not induce prolonged stress in these species. Moreover, the specific growth rates were similar in the tagged and untagged fish of both species. Conclusion: Tag implantation does not have medium-term consequences for the stress physiology and growth performance of these two marine fish species in a controlled environment. These observations support the use of accelerometer tags as valuable tools for welfare monitoring in aquaculture conditions, as they do not affect the fish’s welfare and health. This study also shows that tagged fish can be sampled during experiments and considered a representative portion of the population, as they display growth and physiological parameters comparable to those of untagged fish.


2020 ◽  
Author(s):  
Sébastien Alfonso ◽  
Walter Zupa ◽  
Amedeo Manfrin ◽  
Eleonora Fiocchi ◽  
Maria Dioguardi ◽  
...  

Abstract Background: Telemetry applied to aquatic organisms has recently developed greatly. Physiological sensors have been increasingly used as tools for fish welfare monitoring. However, for the technology to be used as a reliable welfare indicator, it is important that the tagging procedure does not disrupt fish physiology, behaviour and performance. In this communication, we share our medium-term data on stress physiological profile and growth performance after surgical tag implantation in two important marine fish species for European aquaculture, the sea bream (Sparus aurata) and the European sea bass (Dicentrarchus labrax).Results: Blood samples after surgical tag implantation (46 days for the sea bream and 95 days for the sea bass) revealed no differences between tagged and untagged fish in cortisol, glucose and lactate levels, suggesting that the tag implantation does not induce prolonged stress in these species. Moreover, the specific growth rates were similar in the tagged and untagged fish of both species.Conclusion: Surgical tag implantation does not have medium-term consequences for the stress physiology and growth performance of these two marine fish species in a controlled environment. These observations support the use of accelerometer tags as valuable tools for welfare monitoring in aquaculture conditions. This study also shows that tagged fish can be sampled during experiments and considered a representative portion of the population, as they display growth and physiological parameters comparable to those of untagged fish.


2020 ◽  
Author(s):  
Sébastien Alfonso ◽  
Walter Zupa ◽  
Amedeo Manfrin ◽  
Eleonora Fiocchi ◽  
Maria Dioguardi ◽  
...  

Abstract Background Recently, telemetry applied to the aquatic organisms had a great development. Progressively, physiological sensors were used, as tools for fish welfare monitoring. However, it is important that tagging procedure does not disrupt fish physiology, behavior and performances to be used as a reliable non-invasive welfare indicator. In this communication, we share our mid-term data about stress physiological profile and growth performances following tag implantation in two important marine fish species of the European aquaculture, sea bream (Sparus aurata) and European sea bass (Dicentrarchus labrax). Results Mid-term blood samples post-tag implantation (46 days for sea bream and 95 days for sea bass) revealed no difference between tagged and untagged fish in the cortisol, glucose and lactate levels, suggesting that the tag implantation does not induce prolonged stress in these species. Moreover, the specific growth rate was similar for tagged and untagged fish in both species. Conclusion As a conclusion, the tag implantation does not induce mid-term consequences on the stress physiology and the growth performances of these two marine fish species under controlled environment. These observations first support accelerometer tags as useful tools for welfare monitoring in aquaculture condition because they do not affect the welfare and health of implanted fish. Secondly, this study shown that tagged fish can be sampled during experiments and be considered as a representative portion of the population, displaying similar growth and physiological parameters compared to untagged fish.


2021 ◽  
Vol 22 (4) ◽  
pp. 1614
Author(s):  
María Esther Rodríguez ◽  
Ismael Cross ◽  
Alberto Arias-Pérez ◽  
Silvia Portela-Bens ◽  
Manuel Alejandro Merlo ◽  
...  

Cytogenomics, the integration of cytogenetic and genomic data, has been used here to reconstruct the evolution of chromosomes 2 and 4 of Solea senegalensis. S. senegalensis is a flat fish with a karyotype comprising 2n = 42 chromosomes: 6 metacentric + 4 submetacentric + 8 subtelocentric + 24 telocentric. The Fluorescence in situ Hybridization with Bacterial Artificial Chromosomes (FISH-BAC) technique was applied to locate BACs in these chromosomes (11 and 10 BACs in chromosomes 2 and 4, respectively) and to generate integrated maps. Synteny analysis, taking eight reference fish species (Cynoglossus semilaevis, Scophthalmus maximus, Sparus aurata, Gasterosteus aculeatus, Xiphophorus maculatus, Oryzias latipes, Danio rerio, and Lepisosteus oculatus) for comparison, showed that the BACs of these two chromosomes of S. senegalensis were mainly distributed in two principal chromosomes in the reference species. Transposable Elements (TE) analysis showed significant differences between the two chromosomes, in terms of number of loci per Mb and coverage, and the class of TE (I or II) present. Analysis of TE divergence in chromosomes 2 and 4 compared to their syntenic regions in four reference fish species (C. semilaevis, S. maximus, O. latipes, and D. rerio) revealed differences in their age of activity compared with those species but less notable differences between the two chromosomes. Differences were also observed in peaks of divergence and coverage of TE families for all reference species even in those close to S. senegalensis, like S. maximus and C. semilaevis. Considered together, chromosomes 2 and 4 have evolved by Robertsonian fusions, pericentric inversions, and other chromosomal rearrangements mediated by TEs.


1988 ◽  
Vol 1 (1) ◽  
pp. 71-83 ◽  
Author(s):  
Michael Sinclair ◽  
T. Derrick Iles

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