80 TISSUE RESPIRATION IN INVERTEBRATES 



medial region of nerve, but at 16° C. rate highest in proximal region; endogenous respiratory 

 rate at distal end lower than at proximal end; Guttman, 1935 

 Limulus Polyphemus: Optic nerve; at 24° C, endogenous respiratory rate highest in medial 

 region of nerve; gradient much more pronounced for axon than for sheath; Shapiro, 1937 



RESPmATORY RATE AFTER REMOVAL OF ENDOCRINE GLANDS 



Arthropoda 

 Crustacea 

 Carcinus maenas: Muscle; respiration (with added succinate) lower after eyestalk removal, 



higher again after addition of eyestalk extract; Scheer, Schwabe, and Scheer, 1952 

 Carcinus maenas: Muscle; cyanide-insensitive respiration (with added fructose) much lower 

 than its pre-surgical level three days after eyestalk removal; remains low (but shows a gradual 

 slight increase in level) up to 15 days after surgery; Krishnan, 1954 

 Homarus gammarus: Muscle; respiration (with added succinate) lower after eyestalk removal; 



Scheer, Schwabe, and Scheer, 1952 

 Palaemon squilla: Muscle; respiration (with added succinate) lower after eyestalk removal, in 

 some cases higher again after addition of eyestalk extract; Scheer, Schwabe, and Scheer, 1952 

 Insecta 



Leucophaea maderae: Thoracic muscle; endogenous respiration of animals without corpora 

 allata 1.2 times that of animals with corpora allata; Samuels, 1956 



RESPIRATORY RATE FOLLOWING INJURY 



Arthropoda 

 Insecta 



Tachycines asynamorus: Muscles of hind femur; endogenous respiratory rate of cut muscles 1.4 

 times that of the intact muscles; Kubista, 1956 



