Shell morphometry in sympatric populations of closely related species of the genus Littorina (Neritrema) in two sites in the Norwegian and Barents Sea ...

• Main Authors: Maltseva, Arina L, Varfolomeeva, Marina A, Ayanka, Roman V, Gafarova, Elizaveta R, Repkin, Egor A, Pavlova, Polina A, Shavarda, Alexei L, Mikhailova, Natalia A, Granovitch, Andrei I
• Format: Dataset
• Language: English
• Published: PANGAEA 2021
• Subjects: cryptic species; ecological niche; ecological speciation; geometric morphometrics; Littorina; metabolomics; microhabitat distribution; morphological disparity; niche differentiation; shell shape; Barents Sea; Saltstraumen; Varangerfjord; Varangerfjord*
• Online Access: https://dx.doi.org/10.1594/pangaea.923728; https://doi.pangaea.de/10.1594/PANGAEA.923728

Folder Morphometry contains geometric morphometric data. The shell shape was described by 11 landmarks and 56 semilandmarks. In total, the analysis included: 126 individuals of L. saxatilis (50-141 mm), 32 individuals of L. arcana (81-130 mm), 47 individuals of L. compressa (61-113 mm), 128 individuals of L. obtusata (55-167 mm) and 41 individuals of L. fabalis (50-147 mm). ... : - TPS.tps - the coordinates of landmarks and semilandmarks describing the shape of the shells of mollusks in .tps format.- curveslide.csv [semicolon separated] - semilandmark relative positions for import to geomorph package of R in specific geomorph format:= "before" [landmark id number] - id of landmark before the semilandmark;= "slide" [landmark id number] - semilandmark id;= "after" [landmark id number] - id of landmark after the semilandmark.- links.csv [semicolon separated] - positions of links between landmarks for graphical representation of shapes for import to geomorph package of R in specific geomorph format:= "start" [landmark id number] - landmark id at the link beginning;= "stop" [landmark id number] - landmark id at the link end.morphometry_metadata.csv - metadata on molluscs:= "ID" [text] - image id;= "Site" [text] - the name of the sampling site ("Saltstraumen", "Varangerfjord"); = "Level" [text] - level of the intertidal zone ("upper" or "lower"); = "Species" [text] - species of Littorina ...