Gill remodelling and growth rate of striped catfish Pangasianodon hypophthalmus under impacts of hypoxia and temperature.

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ID: 42826
2017
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Ranked #3 of 32 articles by views in comparative biochemistry and physiology part a, molecular & integrative physiology

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Abstract
Gill morphometric and gill plasticity of the air-breathing striped catfish (Pangasianodon hypophthalmus) exposed to different temperatures (present day 27°C and future 33°C) and different air saturation levels (92% and 35%) during 6weeks were investigated using vertical sections to estimate the respiratory lamellae surface areas, harmonic mean barrier thicknesses, and gill component volumes. Gill respiratory surface area (SA) and harmonic mean water - blood barrier thicknesses (HM) of the fish were strongly affected by both environmental temperature and oxygen level. Thus initial values for 27°C normoxic fish (12.4±0.8g) were 211.8±21.6mmg and 1.67±0.12μm for SA and HM respectively. After 5weeks in same conditions or in the combinations of 33°C and/or PO of 55mmHg, this initial surface area scaled allometrically with size for the 33°C hypoxic group, whereas branchial SA was almost eliminated in the 27°C normoxic group, with other groups intermediate. In addition, elevated temperature had an astounding effect on growth with the 33°C group growing nearly 8-fold faster than the 27°C fish.
Reference Key
phuong2017gillcomparative Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Phuong, Le My;Huong, Do Thi Thanh;Nyengaard, Jens Randel;Bayley, Mark;
Journal comparative biochemistry and physiology part a, molecular & integrative physiology
Year 2017
DOI
S1095-6433(16)30232-X
URL
Keywords
growth performance gill morphometric gill plasticity pangasianodon hypophthalmus

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