...Ute Postel; Fiona Thompson; Gary Barker; Mark Viney; Steve Morris SUMMARY During their annual breeding migration the Christmas Island land crab Gecarcoidea natalis sustains locomotion aerobically for up to 12 h per day compared with just 10 min during the dry season when their muscles quickly...

...Benjamin J. Allardyce; Stuart M. Linton SUMMARY Laminarinase and endo-β-1,4-glucanase were purified and characterised from the midgut gland of the herbivorous land crab Gecarcoidea natalis and the crayfish Cherax destructor . The laminarinase isolated from G. natalis was estimated to have...

... were determined primarily by the differences in commitment to, and investment in, walking and not by direct effects of humidity on respiratory physiology. e-mail: steve.morris@bristol.ac.uk 3 10 2005 © The Company of Biologists Limited 2005 2005 land crab Cardisoma...

...Stuart M. Linton; Peter Greenaway SUMMARY Digestive juice from the herbivorous gecarcinid land crabs Gecarcoidea natalis and Discoplax hirtipes exhibited total cellulase activity and activities of two cellulase enzymes; endo-β-1,4-glucanase and β-1,4-glucosidase. These enzymes hydrolysed native...

... of SW crabs. * Author for correspondence (e-mail: h.taylor@zool.canterbury.ac.nz ) 11 7 2002 © The Company of Biologists Limited 2002 2002 Gecarcoidea natalis land crab osmoregulation chloride reabsorption excretion dopamine cyclic AMP gill Although crabs...

...Stephen Morris ABSTRACT Gills are the primary organ for salt transport, but in land crabs they are removed from water and thus ion exchanges, as well as CO 2 and ammonia excretion, are compromised. Urinary salt loss is minimised in land crabs by redirecting the urine across the gills where salt...

...Stuart M. Linton; Peter Greenaway ABSTRACT The urate content of the gecarcinid land crab Gecarcoidea natalis was correlated to the amount of nitrogen assimilated. Crabs fed a high-nitrogen diet ( ad libitum amounts of soy beans and fig leaves, Ficus macrophylla ) for 6 weeks assimilated...

... ammonia excretion is achieved by volatilisation of NH3 from the branchial fluid. High partial pressures of ammonia in the branchial fluid are produced by apical Na + /NH 4 + exchange and elevation of the pH. 14 01 1994 ©The Company of Biologists Limited 1994 land crab nitrogen...

... ). Aerobic response to exercise of the fastest land crab . Am. J. Physiol. 244 , 530 – 536 . Full , R. J. and Herreid , C. F. ( 1984 ). Fiddler crab exercise: the energetic cost of running sideways . J. exp. Biol. 109 , 141 – 161 . 10.1242/jeb.109.1.141 Full , R. J...

... metabolic in origin, especially during sustained locomotion, but less than could be predicted from concomitant lactate production. 15 11 1993 ©The Company of Biologists Limited 1994 land crab Gecarcoidea natalis exercise oxygen carbon dioxide haemocyanin blood gas transport...

... or volume reabsorption (fluidFions), rather than for ion uptake alone, as the faeces of land crabs are invariably fairly dry and compact and are not a suitable vehicle for fluid excretion. The branchial chambers are suited for dilution of urine by ion reabsorption whilst maintaining an output of fluid...

.... ( 1979 ). From sea to tree: saga of a land crab . Am. Zool . 19 , 385 – 410 . 10.1093/icb/19.2.385 Boutilier , R. G. , Randall , D. J. , Shelton , G. & Toews , D. P. ( 1978 ). Some response characteristics of CO2 electrodes . Respir. Physiol . 32 , 381 – 388...

... the thoracic sinus as a whole nor the infrabranchial sinuses can be considered as reservoirs of truly mixed venous blood in H. transversa . 03 02 1984 © 1984 by Company of Biologists 1984 Land crab gas exchange respiratory circulation The crab Holthuisana transversa...

... introduction to the land crabs of the Palau Islands. Stages in the transition to air breathing . J. exp. Zool . 218 , 1 – 5 . 10.1002/jez.1402180102 Cameron , J. N. & Mecklenburg , T. A. ( 1973 ). Aerial gas exchange in the coconut crab Birgus latro with some notes on Gecarcoidea...