Table 2 Predation rates of some hydroids from different localities
From: Hydroids (Cnidaria, Hydrozoa): A Neglected Component of Animal Forests
Species | Locality | Dominant preys | Predation rate | Carbon intake (mg C m−2 day−1) | References |
|---|---|---|---|---|---|
Campanularia everta Clark, 1876 | Western Mediterranean | POM (88), copepod eggs (7%) | From 4,000 (summer) to 800,000 (winter) preys m−2 day−1 | 6.4 | |
Ectopleura crocea (Agassiz, 1862) | Mar del Plata | Diatoms (100% in winter), crustaceans (summer) | 115·(summer), 93 (autumn), 77 (winter), 200 (spring) preys ind.−1 day−1 | – | Genzano 2005 |
Ectopleura larynx (Ellis & Solander, 1786) | Cumbrae (SW Scotland) | Crustacean eggs, nauplii, copepodites | From 36 (day) to 360 (night) preys ind.−1 day−1 | 89.9 | |
Eudendrium racemosum (Cavolini, 1785) | Medes Islands (Mediterranean) | – | 372,000 preys m−2 day−1 in June | 30.7 | Rossi et al. 2012 |
Eudendrium racemosum (Cavolini, 1785) | North Adriatic Sea (Mediterranean) | Bivalve larvae (43%), tintinnids (32%), invertebrate eggs (7%), invertebrate larvae (6%), amphipods (4%) | Over 6,000 preys m−2 day−1 in summer (without considering POM) | 13 | Di Camillo et al. 2012 |
Eudendrium racemosum (Cavolini, 1785) | Western Mediterranean | Copepod eggs (28%), Copepods (22%), invertebrate larvae (10%) | 120,000 preys m−2 day−1 | 12 | Gili et al. 1998 |
Eudendrium racemosum (Cavolini, 1785) | Western Mediterranean | Above all zooplanktonic preys (crustacean fragments, copepods, larvae) | 100,000 preys m−2 day−1 | – | Barangé and Gili 1998 |
Lytocarpia myriophyllum (Linnaeus, 1758) | Ligurian Sea | – | – | 13,000a | Cerrano et al. 2015 |
Millepora complanata Lamarck, 1816 | Barbados | Copepods (63%) | 480,000 preys m−2 of the corallum’s surface day−1 | 360,000 mg C m−2 of the corallum’s surface day−1 | Lewis 1992 |
Nemalecium lighti (Hargitt, 1924) | San Blas Islands (Panamá) | Diatoms (28%), POM (23%); invertebrate larvae (19%); bivalve larvae (11%) | 400,000 preys m−2 day−1 | 6 | |
Obelia dichotoma (Linnaeus, 1758) | Kongsfjorden (Spitsbergen, Arctic) | Fecal pellets (up to 57% of the total ingested food), phytoplankton (up to 50%), and organic matter (up to 35%) | 261,182 preys m−2 day−1 | 5.5–8.9 | Orejas et al. 2013 |
Obelia geniculata (Linnaeus, 1758) | Chile | Fecal pellets (48%), Copepod eggs (29%), diatoms (17%) | 3,200,000 preys m−2 day−1 | 48 | Gili et al. 1998 |
Silicularia rosea Meyen, 1834 | King George Island (Antarctica) | Benthic diatoms (95%), eggs (2%) | 4,000,000 preys m−2 day−1 | 66 |