TABLE 1 in Do longsnout seahorses Hippocampus reidi (Syngnathiformes: Syngnathidae) have a holdfast preference?
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TABLE 1 | Electivity Index (Ivlev) and Strauss’ Linear Selection Index for holdfast species associated with seahorses at Urca beach and Duas Irmãs island. Values> 0 (seahorses preferred the holdfast). Preference values are in bold type. SpeciesUrca beach IVLEVUrca StraussDuas Irmãs island IVLEVDuas Irmãs island StraussAcanthophora sp.-0.231.43Allochthonous holdfast0.9712.71--Amathia vercilata (Harvey, 1833)0.493.17-0.08-0.68Artificial holdfast16.45Botrylloides nigrum (Herdman, 1886)0.050.14--Carijoa riisei (Duchassaing & Michelotti, 1860)--148.08Clavelina oblonga (Herdman, 1880)0.301.48--Codium sp.0.9512.60--Hymeniacidon heliophila (Wilson, 1911)0-0.02--Hypnea sp.---0.05-1.44Limestone seaweed---0.52-12.54Mycale sp.-0.27-1.22--Plocamium sp.---0.53-13.09Polychaeta0.934.67--Rocks0.222.89--Styela plicata (Leseuer, 1823)0.9118.46--Turf algae-0.30-15.29-0.06-2.60
