Tissue pH and gut ecomorphology in six freshwater teleosts occupying different trophic levels

Authors : Zhimin ZHANG, Xing TIAN, Dapeng LI

Pages : 713-719

View : 18 | Download : 7

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :This study investigated the gastrointestinal insert ignore into journalissuearticles values(GI); tract, blood, and muscle pH, and explored the characteristic of gut morphology insert ignore into journalissuearticles values(relative gut length); associated with trophic level in 6 freshwater teleosts. The results showed that GI pH differences among species and significant differences occurred in GI segments insert ignore into journalissuearticles values(P < 0.05);. The lowest pH values were observed in the stomach of 2 typical carnivorous fish. An increased pH from proximal intestine to distal intestine was found in 4 species. A positive relationship was observed between blood and muscle pH values for these species insert ignore into journalissuearticles values(P < 0.05);. Additionally, relative gut length revealed the trend of divergence depending on the feeding habits insert ignore into journalissuearticles values(in planktivores > omnivores > carnivores);. A robust link was negatively found between relative gut length and trophic level insert ignore into journalissuearticles values(P < 0.05);.
Keywords : Fish, pH, gastrointestinal tract, blood, muscle, gut length