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Morphological and genetic characterization of swimbladder non-inflation in angelfish Pterophyllum scalare (Cichlidae)
Year:
2004
Source of publication :
aquaculture (source)
Authors :
Rabinski, Tatiana
;
.
Volume :
230
Co-Authors:
Zilberg, D., Dept. of Dryland Biotechnologies, Jacob Blaustein Inst. Desert Res., Ben-Gurion University of the Negev, Negev, 84990, Israel
Ofir, R., Dept. of Dryland Biotechnologies, Jacob Blaustein Inst. Desert Res., Ben-Gurion University of the Negev, Negev, 84990, Israel
Rabinski, T., Dept. of Microbiology and Immunology, Ben-Gurion University of the Negev, 84100, Israel
Diamant, A., Department of Pathobiology, National Center for Mariculture, Israel Oceanogr. Limnological Res., Eilat 88112, Israel
Facilitators :
From page:
13
To page:
27
(
Total pages:
15
)
Abstract:
Abnormal development of the swimbladder is described in angelfish, Pterophyllum scalare (Lichtenstein 1823), a popular freshwater ornamental fish widely cultured in a range of strains and varieties. Non-inflated swimbladders in some individuals became apparent when larvae reached an age of 2 weeks. Affected fish were incapable of maintaining their position in the water body and sank to the tank bottom, resting on their flanks. Swimming bouts involved arduous tail movements in an attempt to maintain their position in the water body. Affected fish had slender trunks and partly folded backward dorsal and ventral fins. Histologically, affected fish had a solid cluster of hypertrophic gas gland cells and a hyperplastic rete mirabile instead of a gas-inflated swimbladder. Although it was not determined whether atmospheric air is obligatory for initial inflation of the swimbladder in larvae of this species, the evidence presented suggests that access to the water surface for this purpose in angelfish may not be obligatory. Dilated swimbladders were observed in 1-day-old larvae that were still attached to the hatching stick or had dropped to the tank bottom, with no contact to the water surface. Larvae that had been collected from the water surface displayed similarly dilated swimbladders. The possible cause of swimbladder non-inflation in angelfish is presently under investigation. Although the aetiology remains unknown, we found some alterations in gene expression that were associated with swimbladder non-inflation. The underlying factors have yet to be determined, although genomic alterations, environmental conditions or induced mutation, which involves both factors, are suspected as contributory factors. © 2004 Elsevier B.V. All rights reserved.
Note:
Related Files :
abnormality
Angelfish
aquaculture1 (domain1)
Cichlidae
Genetics
morphology
ornamental species
Pterophyllum scalare
Swimbladder
Show More
Related Content
More details
DOI :
10.1016/j.aquaculture.2003.10.009
Article number:
0
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
28943
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:43
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Scientific Publication
Morphological and genetic characterization of swimbladder non-inflation in angelfish Pterophyllum scalare (Cichlidae)
230
Zilberg, D., Dept. of Dryland Biotechnologies, Jacob Blaustein Inst. Desert Res., Ben-Gurion University of the Negev, Negev, 84990, Israel
Ofir, R., Dept. of Dryland Biotechnologies, Jacob Blaustein Inst. Desert Res., Ben-Gurion University of the Negev, Negev, 84990, Israel
Rabinski, T., Dept. of Microbiology and Immunology, Ben-Gurion University of the Negev, 84100, Israel
Diamant, A., Department of Pathobiology, National Center for Mariculture, Israel Oceanogr. Limnological Res., Eilat 88112, Israel
Morphological and genetic characterization of swimbladder non-inflation in angelfish Pterophyllum scalare (Cichlidae)
Abnormal development of the swimbladder is described in angelfish, Pterophyllum scalare (Lichtenstein 1823), a popular freshwater ornamental fish widely cultured in a range of strains and varieties. Non-inflated swimbladders in some individuals became apparent when larvae reached an age of 2 weeks. Affected fish were incapable of maintaining their position in the water body and sank to the tank bottom, resting on their flanks. Swimming bouts involved arduous tail movements in an attempt to maintain their position in the water body. Affected fish had slender trunks and partly folded backward dorsal and ventral fins. Histologically, affected fish had a solid cluster of hypertrophic gas gland cells and a hyperplastic rete mirabile instead of a gas-inflated swimbladder. Although it was not determined whether atmospheric air is obligatory for initial inflation of the swimbladder in larvae of this species, the evidence presented suggests that access to the water surface for this purpose in angelfish may not be obligatory. Dilated swimbladders were observed in 1-day-old larvae that were still attached to the hatching stick or had dropped to the tank bottom, with no contact to the water surface. Larvae that had been collected from the water surface displayed similarly dilated swimbladders. The possible cause of swimbladder non-inflation in angelfish is presently under investigation. Although the aetiology remains unknown, we found some alterations in gene expression that were associated with swimbladder non-inflation. The underlying factors have yet to be determined, although genomic alterations, environmental conditions or induced mutation, which involves both factors, are suspected as contributory factors. © 2004 Elsevier B.V. All rights reserved.
Scientific Publication
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