[ Structure du tube digestif d’un Channidae africain, Parachanna obscura (Günther, 1861) ]
Zeré Marius GOGBE1, Yao Saki APPIAH2, Attoubé Ida MONNEY3, and Valentin N’douba4
1 Département de Biologie Animale, UFR Sciences Biologiques, Université Peleforo Gon Coulibaly, BP 1328 Korhogo, Côte d’Ivoire
2 Département de Biologie Animale, UFR Sciences Biologiques, Université Peleforo Gon Coulibaly, BP 1328 Korhogo, Côte d’Ivoire
3 Laboratoire de Biodiversité et Ecologie Tropicale, UFR Environnement, Université Lorougnon Guédé, BP 150 Daloa, Côte d’Ivoire
4 Laboratoire d’Hydrobiologie et d’Eco-technologie des Eaux, UFR Biosciences, Université Félix Houphouët-Boigny, Côte d’Ivoire
Original language: French
Copyright © 2025 ISSR Journals. 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.
Knowledge of the digestive tract of fishes is a crucial clue to understanding their diet. Information on the digestive tract of P. obscura remains scarce and fragmentary. Therefore, this work aims to improve our knowledge of P. obscura by investigating the structure of its digestive tract in order to better understand its feeding ecology. To this end, the relationship between the length of the intestine and the standard length was determined by the equation: Li=〖aLS〗^b. On the other hand, the morphological and microscopic aspects of the digestive tract were described. The histological study was carried out according to the standard histological method and stained with haematoxylin and eosin. Intestinal growth relative to standard length follows positive allometry. The digestive tract includes an oesophagus, a developed stomach, a cecum and a relatively short intestine. The wall of the digestive tract consists of four distinct tunics. The muscularis is made up of two layers of muscle fibres at the level of the oesophagus. In other parts of the digestive tract, the muscularis consists of one layer of muscle fibres.
Author Keywords: Parachanna obscura, digestive tract, allometry, morphology, histology, food ecology.
Zeré Marius GOGBE1, Yao Saki APPIAH2, Attoubé Ida MONNEY3, and Valentin N’douba4
1 Département de Biologie Animale, UFR Sciences Biologiques, Université Peleforo Gon Coulibaly, BP 1328 Korhogo, Côte d’Ivoire
2 Département de Biologie Animale, UFR Sciences Biologiques, Université Peleforo Gon Coulibaly, BP 1328 Korhogo, Côte d’Ivoire
3 Laboratoire de Biodiversité et Ecologie Tropicale, UFR Environnement, Université Lorougnon Guédé, BP 150 Daloa, Côte d’Ivoire
4 Laboratoire d’Hydrobiologie et d’Eco-technologie des Eaux, UFR Biosciences, Université Félix Houphouët-Boigny, Côte d’Ivoire
Original language: French
Copyright © 2025 ISSR Journals. 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.
Abstract
Knowledge of the digestive tract of fishes is a crucial clue to understanding their diet. Information on the digestive tract of P. obscura remains scarce and fragmentary. Therefore, this work aims to improve our knowledge of P. obscura by investigating the structure of its digestive tract in order to better understand its feeding ecology. To this end, the relationship between the length of the intestine and the standard length was determined by the equation: Li=〖aLS〗^b. On the other hand, the morphological and microscopic aspects of the digestive tract were described. The histological study was carried out according to the standard histological method and stained with haematoxylin and eosin. Intestinal growth relative to standard length follows positive allometry. The digestive tract includes an oesophagus, a developed stomach, a cecum and a relatively short intestine. The wall of the digestive tract consists of four distinct tunics. The muscularis is made up of two layers of muscle fibres at the level of the oesophagus. In other parts of the digestive tract, the muscularis consists of one layer of muscle fibres.
Author Keywords: Parachanna obscura, digestive tract, allometry, morphology, histology, food ecology.
Abstract: (french)
La connaissance du tube digestif des poissons est un indice capital dans la compréhension de leur régime alimentaire. Les informations concernant le tube digestif de P. obscura demeurent rares et fragmentaires. Ainsi, ce travail se propose d’approfondir la connaissance de P. obscura, en abordant la structure du tube digestif afin de mieux comprendre son écologie alimentaire. Pour ce faire, la relation entre la longueur intestinale et la longueur standard a été déterminée par l’équation: Li=〖aLS〗^b d’une part. D’autre part, les aspects morphologique et microscopique du tube digestif ont été décrits. L’étude histologique a été faite selon la méthode standard d’histologie et la coloration a été faite à l’hématoxyline et l’éosine. La croissance de l’intestin par rapport à la longueur standard suit une allométrie positive. Le tube digestif comporte un œsophage, un estomac développé, des cæcums et un intestin relativement court. La paroi du tube digestif est constituée de quatre tuniques distinctes. La musculeuse est formée de deux couches de fibres musculaires au niveau de l’œsophage. Dans les autres parties du tube digestif, la musculeuse est formée d’une couche de fibres musculaires.
Author Keywords: Parachanna obscura, tube digestif, allométrie, morphologie, histologie, écologie alimentaire.
