In order to evaluate the importance of mangrove leaf detritus as a food source for decapod crustacean larvae, stable isotopes (δ13C and δ15N) were measured in the tissueof these larvae and other selected organisms. Decapod crustacean larvae and planktonic adult decapods, Lucifer faxoni and Acetes americanus, were sampled in the Itamaracá estuarine system, Brazil. For comparison with stableisotope values in the estuary, plankton and POM samples were also taken on the adjacent continental shelf. In the Itamaracá estuarine system, δ13C of decapod larvae and the holoplanktonic decapods L.faxoni and A. americanus ranged from about -17 to -23‰ (mean: -19.8 ± 1.5‰). This indicates that the contribution of mangrove carbon (δ13C: -26.8‰) to larvalnutrition was generally negligible. Among decapod larvae, porcellanid zoeae showed relatively low δ13C values, while penaeid shrimp postlarvae showed the highest δ13C. Porcellanidzoeae were thus the only decapod larvae with a considerable percentage (13 to 40%) of mangrove carbon in their tissue. However, these low values may also be due to a negative isotope shift that occurs during embryogenesis. Feeding experiments with zoeaeof Petrolisthes armatus (Anomura:Porcellanidae)and Sesarma rectum (Brachyura: Grapsidae) showed assimilatory shifts of up to 1.0 ± 0.2‰ for 13C and up to 1.4 ± 0.6‰ for 15N. Analysis ofembryonic isotope fractionation for 5 decapod crustacean species, P. armatus, S. rectum, Aratus pisonii, Uca thayeri,and U. maracoani, showed that larval tissue was 13C-depleted by up to 3.8‰ and15N-depleted by up to 2.3‰ in relation to parental tissue.
Schwamborn R., Ekau W., Voss M. and Saint-Paul U. (2002) How important are mangroves as a carbon source for decapod crustacean larvae in a tropical estuary? Marine Ecology Progress Series 229: 195-205. 10.3354/meps229195
@article{Schwamborn2002,
Title = {How important are mangroves as a carbon source for decapod crustacean larvae in a tropical estuary?},
Author = {Schwamborn, R and Ekau, Werner and Voss, M and Saint-Paul, Ulrich},
Editor = {},
Journal = {Marine Ecology Progress Series},
Year = {2002},
Pages = {195-205},
Volume = {229},
Doi = {10.3354/meps229195},
Abstract = {In order to evaluate the importance of mangrove leaf detritus as a food source for decapod crustacean larvae, stable isotopes (δ13C and δ15N) were measured in the tissueof these larvae and other selected organisms. Decapod crustacean larvae and planktonic adult decapods, Lucifer faxoni and Acetes americanus, were sampled in the Itamaracá estuarine system, Brazil. For comparison with stableisotope values in the estuary, plankton and POM samples were also taken on the adjacent continental shelf. In the Itamaracá estuarine system, δ13C of decapod larvae and the holoplanktonic decapods L.faxoni and A. americanus ranged from about -17 to -23‰ (mean: -19.8 ± 1.5‰). This indicates that the contribution of mangrove carbon (δ13C: -26.8‰) to larvalnutrition was generally negligible. Among decapod larvae, porcellanid zoeae showed relatively low δ13C values, while penaeid shrimp postlarvae showed the highest δ13C. Porcellanidzoeae were thus the only decapod larvae with a considerable percentage (13 to 40%) of mangrove carbon in their tissue. However, these low values may also be due to a negative isotope shift that occurs during embryogenesis. Feeding experiments with zoeaeof Petrolisthes armatus (Anomura:Porcellanidae)and Sesarma rectum (Brachyura: Grapsidae) showed assimilatory shifts of up to 1.0 ± 0.2‰ for 13C and up to 1.4 ± 0.6‰ for 15N. Analysis ofembryonic isotope fractionation for 5 decapod crustacean species, P. armatus, S. rectum, Aratus pisonii, Uca thayeri,and U. maracoani, showed that larval tissue was 13C-depleted by up to 3.8‰ and15N-depleted by up to 2.3‰ in relation to parental tissue.},
}
TY - JOUR
AU - Schwamborn, R
AU - Ekau, Werner
AU - Voss, M
AU - Saint-Paul, Ulrich
TI - How important are mangroves as a carbon source for decapod crustacean larvae in a tropical estuary?
T2 - Marine Ecology Progress Series
PY - 2002
SP - 195-205
VL - 229
DO - 10.3354/meps229195
AB - In order to evaluate the importance of mangrove leaf detritus as a food source for decapod crustacean larvae, stable isotopes (δ13C and δ15N) were measured in the tissueof these larvae and other selected organisms. Decapod crustacean larvae and planktonic adult decapods, Lucifer faxoni and Acetes americanus, were sampled in the Itamaracá estuarine system, Brazil. For comparison with stableisotope values in the estuary, plankton and POM samples were also taken on the adjacent continental shelf. In the Itamaracá estuarine system, δ13C of decapod larvae and the holoplanktonic decapods L.faxoni and A. americanus ranged from about -17 to -23‰ (mean: -19.8 ± 1.5‰). This indicates that the contribution of mangrove carbon (δ13C: -26.8‰) to larvalnutrition was generally negligible. Among decapod larvae, porcellanid zoeae showed relatively low δ13C values, while penaeid shrimp postlarvae showed the highest δ13C. Porcellanidzoeae were thus the only decapod larvae with a considerable percentage (13 to 40%) of mangrove carbon in their tissue. However, these low values may also be due to a negative isotope shift that occurs during embryogenesis. Feeding experiments with zoeaeof Petrolisthes armatus (Anomura:Porcellanidae)and Sesarma rectum (Brachyura: Grapsidae) showed assimilatory shifts of up to 1.0 ± 0.2‰ for 13C and up to 1.4 ± 0.6‰ for 15N. Analysis ofembryonic isotope fractionation for 5 decapod crustacean species, P. armatus, S. rectum, Aratus pisonii, Uca thayeri,and U. maracoani, showed that larval tissue was 13C-depleted by up to 3.8‰ and15N-depleted by up to 2.3‰ in relation to parental tissue.
ER -
