Biometrics, Carbon and Nitrogen Content in Two Cnidarians: Urticina Felina and Alcyonium Digitatum

1996 ◽  
Vol 76 (3) ◽  
pp. 595-602 ◽  
Author(s):  
A. Migné ◽  
D. Davoult ◽  
M.A. Janquin ◽  
A. Kupka
Keyword(s):  
Organic Carbon ◽  
Nitrogen Content ◽  
Dry Weight ◽  
Sea Anemones ◽  
Carbon And Nitrogen ◽  
Rapid Measurement ◽  
Constant Size ◽  
Linear Relationships ◽  
Carbon And Nitrogen Content ◽  
Biometrical Study

A biometrical study was conducted on two common cnidarians: Alcyonium digitatum (Octocorallia) and Urticina felina (Hexacorallia). The aim was to relate both the carbon and the nitrogen content of these species to a simple and rapid measurement. As the simplest measurement that can be done on A. digitatum is a measurement of size, relationships were determined between the height of a colony and its organic carbon (OC=0.0002 H2.0254, n=104, γ2=0·923) and nitrogen (N=0.00004 H2.0283, n=104, γ2=0.928) content. As no constant size could be determined on sea anemones, linear relationships were established between dry weight (DW) and organic carbon (OC=0.419 DW, n=65, r=0.995) and nitrogen (N=0.095 DW, n=65, r=0.997) content in U. felina. All these relationships were highly significant (P<0.1%) and appeared useful to express biomass of the two species in terms of carbon or nitrogen and then to consider dynamic processes such as respiration or excretion as fluxes of carbon and nitrogen.

Carbon and nitrogen content of Laminaria saccharina in the eastern English Channel: biometrics and seasonal variations

2001 ◽  
Vol 81 (5) ◽  
pp. 727-734 ◽  
Author(s):  
F. Gevaert ◽  
D. Davoult ◽  
A. Creach ◽  
R. Kling ◽  
M.-A. Janquin ◽  
...  
Keyword(s):  
Nitrogen Content ◽  
Seasonal Pattern ◽  
Dry Weight ◽  
Early Spring ◽  
English Channel ◽  
Laminaria Saccharina ◽  
Carbon And Nitrogen ◽  
Clear Seasonal Pattern ◽  
Total Dry Weight ◽  
Carbon And Nitrogen Content

Fresh weight (FW), dry weight (DW), carbon and nitrogen content were measured for specimens of Laminaria saccharina (Heterokontophyta: Phaeophyceae) sampled in the eastern English Channel in order to conduct a biometrical study. The aim was to relate carbon and nitrogen masses of the algae to a simple and rapid morphological measurement of the total length of the sporophyte. These relationships were highly significant and appeared very useful to express the standing biomass of L. saccharina in terms of carbon or nitrogen and then to consider dynamic processes such as primary production. Variations in tissue carbon (C) and nitrogen (N) were examined over a complete seasonal cycle. Average carbon and nitrogen content ranged from 23·9 to 31·4% and 2·23 to 3·42% of the total dry weight, respectively. Variations in C/N ratio showed a clear seasonal pattern with an increase in the early spring corresponding to strong photosynthesis and growth.

Larval development and metamorphosis of Balanus albicostatus (Cirripedia: Thoracica); implications of temperature, food concentration and energetics

2006 ◽  
Vol 86 (2) ◽  
pp. 335-343 ◽  
Author(s):  
Dattesh Desai ◽  
Lidita Khandeparker ◽  
Yoshihisa Shirayama
Keyword(s):  
Organic Carbon ◽  
Nitrogen Content ◽  
Food Concentration ◽  
Carbon And Nitrogen ◽  
Food Concentrations ◽  
Development Duration ◽  
Influence Of Food ◽  
Effect Of Food ◽  
Naupliar Development ◽  
Carbon And Nitrogen Content

The influence of food concentrations (0.5, 1 and 2×105 cells ml−1) and temperatures (20 and 30°C) on the survival, development, organic carbon and nitrogen content of Balanus albicostatus larvae was evaluated. The effect of food concentration on the subsequent ageing and metamorphosis of cypris larva was also determined. At lower food concentration and temperature, naupliar development duration was prolonged and the rate of metamorphosis of nauplius to cyprid was low. The rearing food concentration affected organic carbon and nitrogen content of the nauplii, which was also reflected in non-feeding cyprids. A decrease in the carbon content was observed with cyprid ageing at 5°C. Metamorphosis was higher in 8-d aged cyprids when compared to 2-d aged cyprids, and was positively influenced by the natural biofilm.

Dry Weights, Carbon and Nitrogen Content of Decapod Larvae from the Plankton

1998 ◽  
Vol 78 (1) ◽  
pp. 341-344 ◽  
Author(s):  
J.A. Lindley
Keyword(s):  
Carbon Content ◽  
Nitrogen Content ◽  
Carapace Length ◽  
C:N Ratio ◽  
Dry Weight ◽  
Published Data ◽  
Similar Data ◽  
Carbon And Nitrogen ◽  
Carbon And Nitrogen Content ◽  
Decapod Larvae

The carapace lengths, dry weights, carbon content and nitrogen content of decapod larvae sorted from fresh plankton samples were measured. Regressions for the relationships between dry weight and carapace length were determined for each infraorder and for lower taxa. Regressions between carbon content, nitrogen content and C:N ratio and dry weight were calculated for the different taxa and were compared with published data on larvae reared in the laboratory.Decapod larvae often comprise a significant component of the zooplankton of estuaries and inshore waters (Lindley et al., 1994). Lindley (1988) has presented data on the relationship between dry weight and carapace length for brachyuran larvae from the plankton. Similar data for other groups of decapods and additional data and analyses for brachyurans are presented here with data on carbon and nitrogen content. Anger & Harms (1990) described the relationships between dry weight; carbon and nitrogen content for decapod larvae reared under controlled conditions in the laboratory. The results of measurements on specimens caught in the plankton in naturally varying conditions provide a comparison with laboratory reared larvae. Harms et al. (1994) compared dry weights and biochemical data for Carcinus maenas (Brachyura) larvae reared in the laboratory with specimens from the plankton off Helgoland. Dry weights of the last two zoea stages and the megalopa larvae from the plankton were higher. The percentage carbon, nitrogen and lipid content were higher in laboratory raised larvae which were fed on Artemia nauplii than in field specimens or in laboratory reared specimens fed on phytoplankton or starved.

Effects of different olive-grove management systems on the organic carbon and nitrogen content of the soil in Jaén (Spain)

2008 ◽  
Vol 98 (1) ◽  
pp. 56-67 ◽  
Author(s):  
J. Castro ◽  
E. Fernández-Ondoño ◽  
C. Rodríguez ◽  
A.M. Lallena ◽  
M. Sierra ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Nitrogen Content ◽  
Management Systems ◽  
Olive Grove ◽  
Carbon And Nitrogen ◽  
Carbon And Nitrogen Content
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