DOI: 10.5281/zenodo.5020362
title: Data from: Building on 150 years of knowledge: freshwater isopod Asellus aquaticus as a new model system

description: <strong>Introduction</strong> This is a literature database with reference information of all papers that use the freshwater isopod <em>Asellus aquaticus; </em>published between the years 1867 and 2020. This database is intended as a starting point for scientists interesting in conducting research on and with this organism. The database includes is currently only available as a single CSV file. It includes specific information about the subject area and content of each paper, as well as bibliographic information. This repository is connected to the paper<em> "Building on 150 years of knowledge: freshwater isopod Asellus aquaticus as a new model system", </em>and contains code to reproduce the figures. <strong>Caption from Figure 1</strong> Over 150 years of research on and with Asellus aquaticus. We conducted a quantitative literature survey with the search tools of Web of Science (WOS, www.webofknowledge.com [Clarivate analytics]) by searching for the term "Asellus aquaticus" in six relevant databases (BIOSIS, CABI, FSTA, Medline, WOS Core Collection and Zoological Records). We found 1235 records published between 1867-2020, including those years. The top panel shows the number of publications per year within a given subject area, as designated by WOS. The bottom panels shows the total number of publications assigned to a specific subject area. The top 10 fields account for 72.58% of all publications, and are indicated by colour coding in the top and bottom panel (multiple assignments are possible, summing up to 2845 assignments). The inset in the bottom panel shows a wordcloud with the 100 most used keywords from all publications. More details on methods, including code to reproduce these figures can be found in the electronic supplementary material. Furthermore, we compiled all records to a single CSV-file with all details (including title, keywords, research areas, abstract, and all other relevant information), which is available online (REF). <strong>Details on Methods from the Electronic Supplementary Material</strong> We used the we online search tools of Web of Science (WOS, www.webofknowledge.com [Clarivate analytics]) by searching for the term "Asellus aquaticus" (capitalization is irrelevant on WOS) in six relevant databases (BIOSIS, CABI, FSTA, Medline, WOS Core Collection and Zoological Records). The database was accessed with a University License (Lund University). We manually downloaded the results and combined them to a single CSV file in Excel (Microsoft). All further processing was done in the programming language R. <br> From the 1237 obtained records we discarded three papers that were published after the year 2020 to work with completed years only. We used the subject areas assigned by WOS to provide an overview of the fields of science in which A. aquaticus has been most studied. Each paper had between one and ten subject areas assigned by WOS (2845 assignments to 1235 papers = 2.3 assignments per paper, on average). To represent these multiple assignments in relation to the actual number of papers per year, we added up all assignments to a field per year, divided by the total number of assignments in that year, and then multiplied by the number of papers. For example, if there were 12 assignments to "toxicology" in 1993, and 133 assignments in 1993, but only 21 papers published, "toxicology" would get ((12/133)*21) 1.9 papers in 1993. We represent these "fractional assignments" in the top, and the total number of assignments in the lower panel of Figure 1.<br>