nerite

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nerite

(ˈnɪəraɪt)
n
(Animals) any member of the family of small sea snail or freshwater snail Neritidae
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4.64 1.13 (density [dm.sup.2]) Theodoxus fluviatilis 0 0.07 Idotea balthica 0.18 0.01 Sessile (% cover) Cladophora glomerata 15.74 12.64 Balanus improvisus 0.01 0.07 Mytilus trossulus 0.013 0.012 Assemblage Dissimilarity: Per cent standard contribution deviation ratio to dissimilarity Mobile 1.85 78.65 (density [dm.sup.2]) 0.4 14.87 0.37 6.48 Sessile (% cover) 1.09 75.96 0.67 20.60 0.19 3.43 Table 3.
The most common invertebrate taxa were Cerastoderma glaucum, Chironomidae, Gammarus spp., Idotea spp., and Theodoxus fluviatilis. However, species related to the differences among transects were primarily Mytilus trossulus, T.
Tambien debemos destacar la presencia de cinco piezas de adorno, tres sobre gasteropodos perforados: uno marino (Ciclope neritea), uno fluvial (Theodoxus fluviatilis) y otro indeterminado por las fracturas; asi como dos restos de Dentalium sp.
Therefore, data obtained from the literature have been supplemented with new data on the cleavage patterns in embryos of Theodoxus fluviatilis, Ampullaria cf.
Theodoxus fluviatilis were collected from the southern border of the "5e Plas" parallel to the "Tienhovens Kanaal," about 15 km north of Utrecht.
trossulus and Cerastoderma glaucum; the gastropod Theodoxus fluviatilis; and gammarid amphipods.
Hard bottom algal communities were composed mainly of Theodoxus fluviatilis (L.), Jaera albifrons Leach, Idotea chelipes (Slabber), I.
The largest differences were due to the bivalves and gastropods Mytilus trossulus, Macoma balthica, Mya arenaria, Cerastoderma glaucum, Theodoxus fluviatilis, and Dreissena polymorpha.
0.07 4.5 Mytilus trossulus Gould 4.30 40.4 Oligochaeta 0.03 34.8 Paramysis intermedia (Czemiavsky) <0.01 1.1 Pontoporeia femorata Kreyer <0.01 2.2 Saduria entomon (L.) 0.06 4.5 Theodoxus fluviatilis (L.) 0.62 16.9 Trichoptera <0.01 2.2 Taxon Min depth, Max depth, m m Balanus improvisos Darwin 2.1 22.2 Bathyporeia pilosa Lindstrom 10.3 15 Cerastoderma glaucum (Poiret) 11 20 Chironomidae 2.1 7.3 Cordylophora carpia (Pallas) 9 11 Corophium volutator (Pallas) 2.1 28 Diptera 13 13 Dreissena polymorpha (Pallas) 11 11 Electra crustulenta (Pallas) 10 10 Gammarus juv.
Gray) 0.783 0.047 0.028 0.129 Cyanophtalma obscura (Schultze) 0.000 0.000 0.008 0.002 Saduria entomon (L.) 0.000 0.000 0.000 0.000 Theodoxus fluviatilis (L.) 0.159 0.000 0.055 0.000 Total biomass 142.377 114.571 40.590 20.686 Station M3 M4 MS Balanus improvisos Darwin 0.000 10.098 2.786 Bathyporeia pilosa Lindstrom 0.000 0.000 0.000 Cerastoderma glaucum (Poiret) 2.507 4.098 1.739 Chironomidae 0.020 0.008 0.000 Corophium volutator (Pallas) 0.071 0.452 0.012 Gammarus juv.
The dominant species in the sample were the gastropods Theodoxus fluviatilis and Hydrobia ulvae (Pennant), the bivalve Macoma balthica (L.), and amphipods Gammarus spp.