Table 2 Diet composition of S. randalli (n = 3), S. fuscescens (n = 2) and S. lineatus (n = 3) caught in Goro, New Caledonia, and expressed in frequency of occurrence (%F), percent by number (%N) and percent by weight (%W). %IRI: Percent of Index of Relative Importance
From: First record of Siganus randalli (Teleost, Siganidae) in New Caledonia, and comments on its diet
Items prey | S. randalli | S. lineatus | S. fuscescens | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
F% | N% | W% | %IRI | F% | N% | W% | %IRI | F% | N% | W% | %IRI | |
Magnoliophyta | ||||||||||||
Halophila spp. | - | - | - | - | - | - | - | - | 50.0 | 1.0 | 2.8 | 1.5 |
Thalassia hemprichii | - | - | - | - | - | - | - | - | 100.0 | 5.7 | 8.3 | 11.5 |
Rhodophyta | ||||||||||||
Amphiroa sp. | - | - | - | - | - | - | - | - | 50.0 | 42.9 | 55.5 | 40.2 |
Bostrychia sp. | 100.0 | 75.6 | 67.2 | 74.2 | 100.0 | 49.0 | 44.6 | 62.0 | - | - | - | - |
Centroceras sp. | - | - | - | - | 25.0 | 0.1 | ˂0.1 | ˂0.1 | - | - | - | - |
Ceramiaceae spp. | 100.0 | 0.4 | 0.1 | 0.3 | 50.0 | 3.0 | 0.1 | 1.0 | 100.0 | 18.1 | 1.4 | 15.9 |
Ceramium spp. | - | - | - | - | 50.0 | 0.9 | 0.1 | 0.3 | - | - | - | - |
Gelidiella sp. | - | - | - | - | - | - | - | - | 50.0 | 17.1 | 18.5 | 14.6 |
Gelidium sp. | 66.7 | 3.7 | 3.8 | 2.6 | 50.0 | 0.7 | 0.4 | 0.4 | - | - | - | - |
Gracilaria sp. | - | - | - | - | 25.0 | 0.1 | 0.1 | ˂0.1 | - | - | - | - |
Hypnea spp. | - | - | - | - | 25.0 | ˂0.1 | 0.1 | ˂0.1 | 50.0 | 1.0 | 2.3 | 1.3 |
Hypoglossum sp. | 33.3 | ˂0.1 | 0.1 | ˂0.1 | - | - | - | - | - | - | - | - |
Lomentaria sp. | 100.0 | 4.2 | 6.9 | 5.7 | 100.0 | 4.6 | 6.4 | 7.3 | - | - | - | - |
Polysiphonia sp. | 66.7 | 1.1 | 1.8 | 1.0 | 50.0 | 9.0 | 16.1 | 8.3 | - | - | - | - |
Tolypiocladia sp. | - | - | - | - | 25.0 | 0.3 | 0.1 | 0.1 | - | - | - | - |
Chlorophyta | ||||||||||||
Caulerpa verticillata | 66.7 | 0.7 | 0.4 | 0.4 | 75.0 | 3.3 | 1.7 | 2.5 | - | - | - | - |
Chlorodesmis sp. | - | - | - | - | 25.0 | 6.0 | 10.7 | 2.8 | - | - | - | - |
Ulva sp. | - | - | - | - | - | - | - | - | 50.0 | 4.8 | 0.9 | 2.3 |
Phaeophyta | ||||||||||||
Padina sp. | 33.3 | 1.5 | 2.0 | 0.6 | 25.0 | 4.2 | 2.3 | 1.1 | - | - | - | - |
Dictyota sp. | 100.0 | 10.7 | 17.7 | 14.8 | 50.0 | 9.9 | 16.7 | 8.8 | - | - | - | - |
Invertebrates | ||||||||||||
Amphipods | 66.7 | 0.2 | 0.1 | 0.1 | 75.0 | 0.4 | 0.3 | 0.4 | - | - | - | - |
Ascidians | 33.3 | 0.3 | ˂0.1 | 0.1 | 25.0 | 0.1 | 0.1 | ˂0.1 | 50.0 | 2.9 | 3.8 | 2.7 |
Copepods | - | - | - | - | 75.0 | 0.5 | ˂0.1 | 0.2 | - | - | - | - |
Foraminiferans | 66.7 | 0.3 | ˂0.1 | 0.1 | 100.0 | 3.1 | ˂0.1 | 2.2 | 50.0 | 1.9 | ˂0.1 | 0.8 |
Halacarids | 33.3 | 0.5 | ˂0.1 | 0.1 | 25.0 | 0.2 | ˂0.1 | ˂0.1 | - | - | - | - |
Hydrozoans | - | - | - | - | - | - | - | - | 100.0 | 4.8 | 6.6 | 9.2 |
Isopods | - | - | - | - | 25.0 | 0.1 | ˂0.1 | ˂0.1 | - | - | - | - |
Diptera larvae | - | - | - | - | 25.0 | 0.4 | ˂0.1 | 0.1 | - | - | - | - |
Nematods | 33.3 | 0.5 | ˂0.1 | 0.1 | 100.0 | 3.3 | ˂0.1 | 2.2 | - | - | - | - |
Polychaetes | 33.3 | 0.3 | ˂0.1 | 0.1 | 75.0 | 0.8 | ˂0.1 | 0.4 | - | - | - | - |