Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Comparative Morphology of the Digestive Tract of Anabantoidei Fishes Inhabiting Asian and African Freshwaters

Dobrochna Adamek-Urbańska
* ,
Maciej Kamaszewski
* ORCID logo ,
Wiktoria Wiechetek
ORCID logo ,
Rafał Wild
ORCID logo ,
Julia Boczek
,
Adrian Szczepański
,
Jerzy Śliwiński
Version 1 : Received: 15 June 2023 / Approved: 16 June 2023 / Online: 16 June 2023 (10:53:25 CEST)

A peer-reviewed article of this Preprint also exists.

Adamek-Urbańska, D.; Kamaszewski, M.; Wiechetek, W.; Wild, R.; Boczek, J.; Szczepański, A.; Śliwiński, J. Comparative Morphology of the Digestive Tract of African Bush Fish (Ctenopoma acutirostre) and Paradise Fish (Macropodus opercularis) Inhabiting Asian and African Freshwaters. Animals 2023, 13, 2613. Adamek-Urbańska, D.; Kamaszewski, M.; Wiechetek, W.; Wild, R.; Boczek, J.; Szczepański, A.; Śliwiński, J. Comparative Morphology of the Digestive Tract of African Bush Fish (Ctenopoma acutirostre) and Paradise Fish (Macropodus opercularis) Inhabiting Asian and African Freshwaters. Animals 2023, 13, 2613.

Abstract

Anabantidae is a large and diverse group of fish cultured both under aquaculture conditions and as hobbyists. These fish share a common structural feature in the form of an additional respiratory organ. Despite the enormous availability of these fish worldwide, little is known to date about their feeding preferences in husbandry and their influence on homeostasis under both industrial and domestic conditions. This study describes, for the first time, the structure of the digestive tracts of two Anabantoidei fishes: African bushfish (Ctenopoma acutirostre) and paradise fish (Macropodus opercularis). The overall structure of the digestive tract and its histological structure were analyzed and compared in both fish species. In conclusion, it was shown that physiological predispositions indicate a predominance of omnivorous fish traits in the M. opercularis, in contrast to the C. acutirostre, which has several morphological traits indicating a greater adaptation to carnivory, particularly ichthyophagy. The results obtained will allow further research to be conducted in the future to optimize the nutrition and feeding of these fish and to develop appropriate dietary recommendations.

Keywords

labirynth fish; digestive tract; fish morphology; feeding

Subject

Biology and Life Sciences, Aquatic Science

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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