Rapid regulation of blood parameters under acute hypoxia in the Amazonian fish Prochilodus nigricans

Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
Adalberto Luis ValVera Maria Fonseca de Almeida-Val

Abstract

Prochilodus nigricans, locally known as curimatã, is an Amazonian commercial fish that endures adverse environmental conditions, in particular low dissolved oxygen, during its migration. Poorer environmental conditions are expected in the near future. Prochilodus nigricans overcomes current seasonal and diurnal changes in dissolved oxygen by adjusting erythrocytic levels of ATP and GTP, modulators of Hb-O2 affinity. Will this fish species be endangered under more extreme environmental conditions as hypoxia and acidification tend to occur in a shorter period of time? As P. nigricans does not exhibit any apparent morphological alterations to exploit the air-water interface, it must rely on fast adjustments of blood properties. To investigate this aspect, basic hematology indices, pHe, pHi, plasma lactate, erythrocytic levels of ATP and GTP and functional properties of the hemolysate of P. nigricans were analyzed over a period of 6h in hypoxia and subsequent recovery in normoxia. The levels of erythrocytic GTP were four times higher than ATP and were reduced to ¼ of the original level after 3h under hypoxia. Erythrocytic levels of ATP were unaffected over the experimental period. All other analyzed blood parameters exhibited a tim...Continue Reading

References

Jun 7, 2000·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·A L Val
Mar 20, 1956·The Journal of General Physiology·A F RIGGS, R A WOLBACH
Jun 14, 2005·Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology·A R Chippari-GomesV M F Almeida-Val
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Citations

Oct 11, 2015·Genome Biology and Evolution·Ying WangShunping He
Mar 21, 2016·Fish Physiology and Biochemistry·R B BaptistaV M F Almeida-Val
Jul 28, 2016·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·Graham R ScottAdalberto L Val
Mar 30, 2017·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·Guosong ZhangShaowu Yin
Oct 29, 2018·Fish Physiology and Biochemistry·Cristiano Campos MattioliRonald Kennedy Luz
Jun 6, 2019·Anais Da Academia Brasileira De Ciências·Adalberto Luis Val
Aug 13, 2015·FASEB Journal : Official Publication of the Federation of American Societies for Experimental Biology·Chun-Xiao HuangHuan-Ling Wang
Aug 20, 2019·Fish Physiology and Biochemistry·Cristiano Campos MattioliRonald Kennedy Luz
Mar 6, 2019·The Journal of Experimental Biology·Jules B L DevauxGillian M C Renshaw
Aug 31, 2020·Fish Physiology and Biochemistry·Luanna do Carmo NevesRonald Kennedy Luz
Sep 15, 2021·Fish Physiology and Biochemistry·Livia de Assis PortoGisele Cristina Favero

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