Effect of Tryptophan Dietary Content on Meagre, Argyrosomus regius, Juveniles Stress and Behavioral Response

被引:0
作者
Vasconcelos, Ana [1 ]
Soares, Marta C. [2 ,3 ,4 ]
Barata, Marisa [5 ]
Couto, Ana [6 ]
Teixeira, Barbara [6 ,7 ]
Ribeiro, Laura [5 ]
Pousao-Ferreira, Pedro [5 ]
Mendes, Rogerio [6 ,7 ]
Saavedra, Margarida [6 ,7 ,8 ,9 ]
机构
[1] Univ Porto, Fac Ciencias, P-4169007 Porto, Portugal
[2] Univ Porto, Ctr Invest Biodiversidade & Recursos Genet, InBIO Lab Associado, CIBIO, P-4169007 Porto, Portugal
[3] CIBIO, BIOPOLIS Program Genom Biodivers & Land Planning, P-4485661 Vairao, Portugal
[4] Univ Evora, Ctr Ciencias Mar & Ambiente, Dept Paisagem, MARE.ARNET,Rede Invest Aquat,Ambiente & Ordenament, P-7004516 Evora, Portugal
[5] IPMA Portuguese Inst Occan & Atmosphere, Aquaculture Res Stn EPPO, Av Parque Nat Ria Formosa S-N, P-8700194 Olhao, Portugal
[6] Univ Porto, Interdisciplinary Ctr Marine & Environm Res CIIMAR, CIIMAR, P-4050208 Matosinhos, Portugal
[7] Portuguese Inst Sea & Atmosphere, IP IPMA, Div Aquaculture Upgrading & Bioprospect, P-1495165 Lisbon, Portugal
[8] NOVA Univ Lisbon, Marine & Environm Sci Ctr, NOVA Sch Sci & Technol, MARE, P-2829516 Caparica, Portugal
[9] NOVA Univ Lisbon, NOVA Sch Sci & Technol, Aquat Res Network Associated Lab, ARNET, P-2829516 Caparica, Portugal
关键词
Argyrosomus regius; stress; tryptophan; behavior; cortisol; PLASMA-CORTISOL; NILE TILAPIA; GROWTH; SUPPLEMENTATION; LATERALIZATION; DENSITY; PROFILE;
D O I
10.3390/ani13243762
中图分类号
S8 [畜牧、 动物医学、狩猎、蚕、蜂];
学科分类号
0905 ;
摘要
There are a high number of stressors present in aquaculture that can affect fish welfare and quality. One way of mitigating stress response is by increasing dietary tryptophan. In this study, three diets containing 0.5% (Tript1), 0.6% (Tript2), and 0.8% (Tript3) of tryptophan were tested in 32 g juvenile meagre for 56 days. At the end of the trial, survival, growth, and proximate composition were similar between treatments. Significant differences were found in the plasma parameters before and after a stress test consisting of 30 s of air exposure. Blood glucose levels were higher in the post-stress for all treatments (e.g., 63.9 and 76.7 mg/dL for Tript1 before and after the stress test), and the hemoglobin values were lower in the post-stress of Tript1 (1.9 g/dL compared to 3.0 and 2.4 g/dL for Tript2 and Tript3, respectively). In terms of behavior, three tests were carried out (novel tank diving and shoaling assays, and lateralization test), but no significant differences were found, except for the number of freezing episodes during the anxiety test (1.4 for Tript3 compared to 3.5 and 4.2 for the other treatments). This study suggests that supplementation with dietary tryptophan, particularly in higher dosage (0.8%), can reduce anxiety-like behavior in meagre exposure to acute stress (novel tank). Although the remaining results showed mild effects, they provide some clues as to the potential of this amino acid as a stress mitigator in aquaculture.
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页数:14
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