Literaturdatenbank
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Chen, X., Niu, C.-J., & Pu, L. (2007). Effects of stocking density on growth and non-specific immune responses in juvenile soft-shelled turtle, pelodiscus sinensis. Aquaculture Research, 38(13), 1380–1386.
Added by: Admin (14 Aug 2008 20:34:37 UTC) Last edited by: Beate Pfau (28 Jan 2009 08:56:27 UTC) |
| Resource type: Journal Article BibTeX citation key: Chen2007 View all bibliographic details  |
Categories: General Keywords: Pelodiscus, Pelodiscus sinensis, Schildkröten = turtles + tortoises, Stress = stress, Trionychidae, Trionyx, Verhalten = ethology, Veterinärmedizin = veterinary medicine Creators: Chen, Niu, Pu Collection: Aquaculture Research |
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| Abstract |
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Trionyx To investigate the influence of stocking density on the growth and non-specific immune responses of juvenile soft-shelled turtle, Pelodiscus sinensis, three groups of turtles (initial body weight 74.2+or-12.2 g) were reared in 80 cm (L) x 40 cm (W) x 30 cm (H) tanks for 35 days at three stocking densities (StD), which were 1 individuals (ind.) tank-1 (3.13 ind m-2) for D1, 4 ind. tank-1 (12.5 ind m-2) for D2 and 6 ind. tank-1 (18.75 ind m-2) for D3 respectively. D1 was the control group. Turtles were weighted individually at the beginning and at the end of the trial. At the end of the rearing trial, non-specific immune parameters were determined. The results showed that the heterophil:lymphocyte ratio (HLR) increased and the total plasma protein decreased with increasing StD, suggesting a stress response. Specific growth rate (SGR) significantly decreased with increasing StD. Non-specific immune indicators such as blood cell phagocytic activity, serum haemolytic activity and serum bacteriolytic activity increased clearly at a higher StD, indicating a pattern of immunoenhancement. The results indicated that at StDs of 4 and 6 ind. tank-1, non-specific immune responses were not suppressed compared with the control, but were inversely enhanced at the cost of growth reduction. A possible energy-based trade-off between growth and constitutive immunity may exist in soft-shelled turtles.
Added by: Admin Last edited by: Beate Pfau |
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WIF
Added by: Sarina Wunderlich Last edited by: Beate Pfau |