Respiration in spiders (Araneae)

Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology
Anke Schmitz

Abstract

Spiders (Araneae) are unique regarding their respiratory system: they are the only animal group that breathe simultaneously with lungs and tracheae. Looking at the physiology of respiration the existence of tracheae plays an important role in spiders with a well-developed tracheal system. Other factors as sex, life time, type of prey capture and the high ability to gain energy anaerobically influence the resting and the active metabolic rate intensely. Most spiders have metabolic rates that are much lower than expected from body mass; but especially those with two pairs of lungs. Males normally have higher resting rates than females; spiders that are less evolved and possess a cribellum have lower metabolic rates than higher evolved species. Freely hunting spiders show a higher energy turnover than spiders hunting with a web. Spiders that live longer than 1 year will have lower metabolic rates than those species that die after 1 year in which development and reproduction must be completed. Lower temperatures and starvation, which most spiders can cope with, will decrease the metabolic rate as well.

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Citations

Oct 23, 2016·Arthropod Structure & Development·Sandra Franz-Guess, J Matthias Starck
Aug 22, 2020·Annual Review of Entomology·Dimitar Dimitrov, Gustavo Hormiga

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