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

DOI

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 (L.arcana, L.saxatilis, L.compressa, L.obtusata, L.fabalis) ;= "Sex" [text] - sex ("f" - female; "m" - male);= "SpeciesGroup" - name of the species group ("'saxatilis'" - "saxatilis", "'obtusata'" -"obtusata");= "SpeciesSubpopulation" [text] - species name and subpopulation.- TPS_measurement_error.tps - the coordinates of landmarks and semilandmarks describing the shape of the shells of molluscs in .tps format. The dataset for calculation of measurement error related to digitization. measurement_error_metadata.csv- metadata on molluscs in TPS_measurement_error.tps (for variable description see morphometry_metadata.csv).
Identifier
DOI https://doi.org/10.1594/PANGAEA.923728
Related Identifier https://doi.org/10.1594/PANGAEA.923735
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.923728
Provenance
Creator Maltseva, Arina L; Varfolomeeva, Marina A ORCID logo; Ayanka, Roman V; Gafarova, Elizaveta R; Repkin, Egor A; Pavlova, Polina A; Shavarda, Alexei L; Mikhailova, Natalia A; Granovitch, Andrei I (ORCID: 0000-0002-5203-104X)
Publisher PANGAEA
Publication Year 2021
Rights Creative Commons Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Representation
Language English
Resource Type Dataset
Format application/zip
Size 119.6 kBytes
Discipline Earth System Research