Relative quantities (in mole%) of the organic LMM and inorganic phosphate in orb webs of the three species studied, as measured in non-radioactive web collections
| . | Araneus cavaticus . | . | Argiope aurantia . | . | Argiope trifasciata . | . | |||
|---|---|---|---|---|---|---|---|---|---|
| . | Mean1 ±s.e.m. . | Range2 . | Mean1 ±s.e.m. . | Range2 . | Mean ±s.e.m.1 . | Range2 . | |||
| Putrescine | 0.58±0.067 | ND-1.24 | ND | ND | 1.11±0.157 | ND-1.85 | |||
| Choline | 7.5±0.94 | 0.3-15.9 | 4.2±0.90 | 0.2-7.4 | 6.7±1.28 | ND-12.2 | |||
| GABamide | 42.1±1.05 | 31.6-58.3 | 52.6±1.73 | 47.6-70.8 | 3.9±0.93 | 0.6-31.8 | |||
| N-acetylputrescine | 3.13±0.186 | ND-6.60 | ND | ND | 32.8±0.97 | 14.7-43.0 | |||
| Glycine betaine | 0.37±0.083 | ND-2.42 | 0.65±0.227 | ND-2.00 | 2.4±0.61 | ND-5.0 | |||
| Glycine | 1.33±0.157 | 0.25-15.5 | 2.5±0.55 | 0.7-19.9 | 8.9±0.55 | 2.6-31.6 | |||
| Alanine | 0.45±0.043 | ND-2.76 | 0.16±0.030 | ND-2.85 | 2.82±0.207 | 0.18-6.06 | |||
| Proline | 0.76±0.159 | ND-8.83 | ND | ND-1.65 | ND | ND | |||
| Taurine | ND | ND | 0.36±0.048 | ND-0.58 | 0.32±0.101 | ND-0.80 | |||
| N-acetyltaurine | 6.0±0.50 | 2.0-14.4 | 12.7±0.64 | 2.5-17.2 | 10.3±1.25 | 0.2-13.2 | |||
| Isethionate | 24.5±0.75 | 6.0-33.1 | 8.8±0.77 | 1.5-11.6 | 19.1±1.71 | 9.2-39.8 | |||
| H2PO4- | 13.2±0.37 | 10.0-22.7 | 18.1±0.46 | 8.7-22.8 | 11.6±0.28 | 4.8-15.8 | |||
| . | Araneus cavaticus . | . | Argiope aurantia . | . | Argiope trifasciata . | . | |||
|---|---|---|---|---|---|---|---|---|---|
| . | Mean1 ±s.e.m. . | Range2 . | Mean1 ±s.e.m. . | Range2 . | Mean ±s.e.m.1 . | Range2 . | |||
| Putrescine | 0.58±0.067 | ND-1.24 | ND | ND | 1.11±0.157 | ND-1.85 | |||
| Choline | 7.5±0.94 | 0.3-15.9 | 4.2±0.90 | 0.2-7.4 | 6.7±1.28 | ND-12.2 | |||
| GABamide | 42.1±1.05 | 31.6-58.3 | 52.6±1.73 | 47.6-70.8 | 3.9±0.93 | 0.6-31.8 | |||
| N-acetylputrescine | 3.13±0.186 | ND-6.60 | ND | ND | 32.8±0.97 | 14.7-43.0 | |||
| Glycine betaine | 0.37±0.083 | ND-2.42 | 0.65±0.227 | ND-2.00 | 2.4±0.61 | ND-5.0 | |||
| Glycine | 1.33±0.157 | 0.25-15.5 | 2.5±0.55 | 0.7-19.9 | 8.9±0.55 | 2.6-31.6 | |||
| Alanine | 0.45±0.043 | ND-2.76 | 0.16±0.030 | ND-2.85 | 2.82±0.207 | 0.18-6.06 | |||
| Proline | 0.76±0.159 | ND-8.83 | ND | ND-1.65 | ND | ND | |||
| Taurine | ND | ND | 0.36±0.048 | ND-0.58 | 0.32±0.101 | ND-0.80 | |||
| N-acetyltaurine | 6.0±0.50 | 2.0-14.4 | 12.7±0.64 | 2.5-17.2 | 10.3±1.25 | 0.2-13.2 | |||
| Isethionate | 24.5±0.75 | 6.0-33.1 | 8.8±0.77 | 1.5-11.6 | 19.1±1.71 | 9.2-39.8 | |||
| H2PO4- | 13.2±0.37 | 10.0-22.7 | 18.1±0.46 | 8.7-22.8 | 11.6±0.28 | 4.8-15.8 | |||
All inorganic phosphorus was assumed to be present as H2PO4-.
ND, none detected by 1H-NMR.
N values: Araneus cavaticus: means, N=21;ranges, N=86; Argiope aurantia: means, N=7; ranges, N=102; Argiope trifasciata: means, N=7; ranges, N=123.
Means were calculated using only data from web collections 2-6 from feeding groups and web collections 2-3 from starving groups. This selection is somewhat arbitrary, but averages calculated from these data are probably closer to typical molar percentages in field-built webs than are means calculated using data from all web collections. Even so, some of the means presented (e.g. Cho) may still deviate substantially from average field-built webs.
Ranges consider data from all non-radioactive web collections.