Gill dimensions were analysed in relation to body mass in three erythrinid fish, an air-breathing species, Hoplerythrinus unitaeniatus, and two ecologically distinct water-breathing species, Hoplias malabaricus and Hoplias lacerdae. Evidence was obtained of remarkable differences in patterns of increase in filament length, number of secondary lamellae, bilateral area of the secondary lamellae, total area of the secondary lamellae, and mass-specific area of the secondary lamellae among these three species. The analysis showed a large increase in respiratory surface area relative to body mass in H. malabaricus (b = 1.14) compared with Hoplias lacerdae (b = 0.81) and H. unitaeniatus (b = 0.66). This difference is mainly attributed to an increase surface area of individual secondary lamellae together with an increase in filament length and total number of secondary lamellae. The results indicate that the increased respiratory surface area of the H. malabaricus gill facilitates oxygen uptake in hypoxic environments as the fish grows and this suggests that gill dimensions may reflect ecological factors and not only respiratory requirements.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.