TY - JOUR
T1 - Some considerations on calcium homeostasis in semi-terrestrial crabs
AU - Zanotto, F. P.
AU - Pinheiro, F.
AU - Brito, L. A.
AU - Wheatly, M. G.
N1 - Funding Information:
We would like to thank FAPESP (96/09756-9) and Universidade Presbiteriana Mackenzie for the financial support and NSF grant IBN 0076035 to MGW.
PY - 2004/12
Y1 - 2004/12
N2 - Calcium (Ca), deposited as CaCO3 after molting events take place, indicates that Ca levels in semi-terrestrial crabs should be regulated at the dietary level as well as through whole animal net Ca flux. Two semi-terrestrial crabs found in salt marsh environments (Sesarma rectum and Chasmagnathus granulata) were fed purified diets with variable Ca concentrations (0%, 2.22% and 6.66% Ca). Both animals displayed similar feeding strategies through consumption of higher amounts of the diet containing more Ca (6.66% Ca). Sesarma, a predominantly herbivore crab, ate more quantities of all the diets offered when compared to Chasmagnathus, a more carnivorous crab. Whole animal net fluxes of Ca over 5 days in Sesarma show that fluxes vary from 2.5 to 1.5 mmol kg-1 h-1, similar to values found earlier for a crayfish, Procambarus clarkii. However, the fluxes over 5 days did not decrease significantly compared to fluxes for the first day postmolt. Overall, semi-terrestrial crabs seem to maximize Ca influx through the gills and through dietary intake, a mineral that is known to have great importance for biomineralization in crustaceans.
AB - Calcium (Ca), deposited as CaCO3 after molting events take place, indicates that Ca levels in semi-terrestrial crabs should be regulated at the dietary level as well as through whole animal net Ca flux. Two semi-terrestrial crabs found in salt marsh environments (Sesarma rectum and Chasmagnathus granulata) were fed purified diets with variable Ca concentrations (0%, 2.22% and 6.66% Ca). Both animals displayed similar feeding strategies through consumption of higher amounts of the diet containing more Ca (6.66% Ca). Sesarma, a predominantly herbivore crab, ate more quantities of all the diets offered when compared to Chasmagnathus, a more carnivorous crab. Whole animal net fluxes of Ca over 5 days in Sesarma show that fluxes vary from 2.5 to 1.5 mmol kg-1 h-1, similar to values found earlier for a crayfish, Procambarus clarkii. However, the fluxes over 5 days did not decrease significantly compared to fluxes for the first day postmolt. Overall, semi-terrestrial crabs seem to maximize Ca influx through the gills and through dietary intake, a mineral that is known to have great importance for biomineralization in crustaceans.
KW - Calcium balance
KW - Calcium net flux
KW - Dietary calcium
KW - Semi-terrestrial crabs
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U2 - 10.1016/j.ics.2004.09.018
DO - 10.1016/j.ics.2004.09.018
M3 - Article
AN - SCOPUS:33748479454
VL - 1275
SP - 89
EP - 95
JO - International Congress Series
JF - International Congress Series
SN - 0531-5131
ER -