Neuroendocrinology of Osmoregulation in Decapod Crustacea

The Renal Organs of Certain Decapod Crustacea

Neogene Decapod Crustacea from Southern Chile

Twelve species of Neogene decapod crustaceans are described from late Miocene and early Pliocene deposits in the Valdivia, Osorno-Llanquihue, and Chiloé basins as well as from Mocha Island, offshore from the Temuco Basin, southern Chile. New species of thalassinideans include Ctenocheles notialis and Axianassa? chilensis. Axianassa Schmitt, 1924, has not been reported previously in the fossil r...

Neuroendocrine regulation of osmoregulation and the evolution of air-breathing in decapod crustaceans.

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 reabsorption occurs. Euryhaline marine crabs utilise apical membrane branchial Na(+)/H(+) and Cl(-)/HCO(3)(-) exchange power...

The ontogeny of osmoregulation and its neurosecretory control in the decapod crustacean, Rhithropanopeus harrisii (Gould).

SYNOPSIS. Laboratory-hatched larvae of this estuarine crab were reared at 25°C in seawater of 25%,, salinity for 18 days covering zoeal Stages I to IV and a megalops. Three-day per.iods between zoeal stages represent intermolt stages of circadean metecdysis, diecdysis, and proecdysis. Larvae were exposed to either a series of seawater salinities from 5-40%0 in 5%0 increments or of 10-40%,, in 1...

Growth, tolerance to low salinity, and osmoregulation in decapod crustacean larvae

Marine invertebrate larvae suffer high mortality due to abiotic and biotic stress. In planktotrophic larvae, mortality may be minimised if growth rates are maximised. In estuaries and coastal habitats however, larval growth may be limited by salinity stress, which is a key factor selecting for particular physiological adaptations such as osmoregulation. These mechanisms may be energetically cos...