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Ultraviolet radiation-A (366 nm) induced morphological and histological malformations during embryogenesis of Clarias gariepinus (Burchell, 1822).
J Photochem Photobiol B. 2009 May 04; 95(2):117-28.JP

Abstract

Exposure to ultraviolet radiation has been associated with variety effects in many organisms ranging from molecular and tissue damage to population level effects. The exposure of embryos of the catfish, Clarias gariepinus (Burchell, 1822) to 366nm UVA at different doses 15, 30 and 60 min resulted in the hatching time delayed to 29 h-post-fertilization stage (29 h-PFS) in comparison with normal hatching time of 22h-PFS at 29 degrees C. In embryos exposed to 15 min/UVA, 30 min/UVA and 60 min/UVA the total percentage of hatched embryos/fertilized eggs were 90%, 89% and 85%, respectively, while in control was 95% at 29 h-PFS. The total percentage of mortality/ hatched embryos were (1-14)%, (2-22)%, (2-23)% and (3-40)% for control, 15 min, 30 min and 60 min groups, respectively, at 40 h-PFS. Also as a result some morphological malformations; (yolk sac oedema, body curvature, fin blistering, and dwarfism) were revealed. These destructive effects were also confirmed by histopathological changes in gills, eyes, intestinal tract, spinal cord, notochord, liver, skin and kidney. The results confirm that exposure to UVA caused an exposure time-dependent delay in hatching rate and reduced the percentage of the hatched embryos but the mortality rate increased with increase of the exposure time to UVA.

Authors+Show Affiliations

Zoology Department, Faculty of Science, Assiut University, 71516 Assiut, Egypt.No affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

19285878

Citation

Mahmoud, Usama M., et al. "Ultraviolet radiation-A (366 Nm) Induced Morphological and Histological Malformations During Embryogenesis of Clarias Gariepinus (Burchell, 1822)." Journal of Photochemistry and Photobiology. B, Biology, vol. 95, no. 2, 2009, pp. 117-28.
Mahmoud UM, Mekkawy IA, Sayed Ael-D. Ultraviolet radiation-A (366 nm) induced morphological and histological malformations during embryogenesis of Clarias gariepinus (Burchell, 1822). J Photochem Photobiol B. 2009;95(2):117-28.
Mahmoud, U. M., Mekkawy, I. A., & Sayed, A. e. l. -. D. (2009). Ultraviolet radiation-A (366 nm) induced morphological and histological malformations during embryogenesis of Clarias gariepinus (Burchell, 1822). Journal of Photochemistry and Photobiology. B, Biology, 95(2), 117-28. https://doi.org/10.1016/j.jphotobiol.2009.02.003
Mahmoud UM, Mekkawy IA, Sayed Ael-D. Ultraviolet radiation-A (366 Nm) Induced Morphological and Histological Malformations During Embryogenesis of Clarias Gariepinus (Burchell, 1822). J Photochem Photobiol B. 2009 May 4;95(2):117-28. PubMed PMID: 19285878.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Ultraviolet radiation-A (366 nm) induced morphological and histological malformations during embryogenesis of Clarias gariepinus (Burchell, 1822). AU - Mahmoud,Usama M, AU - Mekkawy,Imman A A, AU - Sayed,Alaa El-Din H, Y1 - 2009/02/20/ PY - 2008/10/26/received PY - 2009/01/30/revised PY - 2009/02/09/accepted PY - 2009/3/17/entrez PY - 2009/3/17/pubmed PY - 2009/6/23/medline SP - 117 EP - 28 JF - Journal of photochemistry and photobiology. B, Biology JO - J Photochem Photobiol B VL - 95 IS - 2 N2 - Exposure to ultraviolet radiation has been associated with variety effects in many organisms ranging from molecular and tissue damage to population level effects. The exposure of embryos of the catfish, Clarias gariepinus (Burchell, 1822) to 366nm UVA at different doses 15, 30 and 60 min resulted in the hatching time delayed to 29 h-post-fertilization stage (29 h-PFS) in comparison with normal hatching time of 22h-PFS at 29 degrees C. In embryos exposed to 15 min/UVA, 30 min/UVA and 60 min/UVA the total percentage of hatched embryos/fertilized eggs were 90%, 89% and 85%, respectively, while in control was 95% at 29 h-PFS. The total percentage of mortality/ hatched embryos were (1-14)%, (2-22)%, (2-23)% and (3-40)% for control, 15 min, 30 min and 60 min groups, respectively, at 40 h-PFS. Also as a result some morphological malformations; (yolk sac oedema, body curvature, fin blistering, and dwarfism) were revealed. These destructive effects were also confirmed by histopathological changes in gills, eyes, intestinal tract, spinal cord, notochord, liver, skin and kidney. The results confirm that exposure to UVA caused an exposure time-dependent delay in hatching rate and reduced the percentage of the hatched embryos but the mortality rate increased with increase of the exposure time to UVA. SN - 1873-2682 UR - https://www.unboundmedicine.com/medline/citation/19285878/Ultraviolet_radiation_A__366_nm__induced_morphological_and_histological_malformations_during_embryogenesis_of_Clarias_gariepinus__Burchell_1822__ L2 - https://linkinghub.elsevier.com/retrieve/pii/S1011-1344(09)00033-5 DB - PRIME DP - Unbound Medicine ER -