{"id":"https://openalex.org/W1589174795","doi":null,"title":"Studies on the spawning activity of the Pacific tunas,Parathunnus mebachi and Neotunnus macropterus,by the gonad index examination.","display_name":"Studies on the spawning activity of the Pacific tunas,Parathunnus mebachi and Neotunnus macropterus,by the gonad index examination.","publication_year":1962,"publication_date":"1962-06-01","ids":{"openalex":"https://openalex.org/W1589174795","mag":"1589174795"},"language":"en","primary_location":{"id":"mag:1589174795","doi":null,"is_oa":false,"landing_page_url":"https://ci.nii.ac.jp/naid/40018191125","pdf_url":null,"source":null,"license":null,"license_id":null,"version":null,"is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":null},"volume":null,"type":"article","is_traditional":true,"indexed_in":[],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5056788900","display_name":"S. Kikawa","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":true,"raw_author_name":"S. Kikawa","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]}],"institutions":[],"countries_distinct_count":0,"institutions_distinct_count":0,"corresponding_author_ids":["https://openalex.org/A5056788900"],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":0.0,"has_fulltext":false,"cited_by_count":6,"citation_normalized_percentile":{"value":0.15068493,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":null,"biblio":{"volume":null,"issue":"1","first_page":null,"last_page":null},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10230","display_name":"Marine and fisheries research","score":0.5717999935150146,"subfield":{"id":"https://openalex.org/subfields/1104","display_name":"Aquatic Science"},"field":{"id":"https://openalex.org/fields/11","display_name":"Agricultural and Biological Sciences"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},"topics":[{"id":"https://openalex.org/T10230","display_name":"Marine and fisheries research","score":0.5717999935150146,"subfield":{"id":"https://openalex.org/subfields/1104","display_name":"Aquatic Science"},"field":{"id":"https://openalex.org/fields/11","display_name":"Agricultural and Biological Sciences"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},{"id":"https://openalex.org/T11505","display_name":"Reproductive biology and impacts on aquatic species","score":0.39010000228881836,"subfield":{"id":"https://openalex.org/subfields/1314","display_name":"Physiology"},"field":{"id":"https://openalex.org/fields/13","display_name":"Biochemistry, Genetics and Molecular Biology"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},{"id":"https://openalex.org/T12319","display_name":"Fish Biology and Ecology Studies","score":0.0203000009059906,"subfield":{"id":"https://openalex.org/subfields/1104","display_name":"Aquatic Science"},"field":{"id":"https://openalex.org/fields/11","display_name":"Agricultural and Biological Sciences"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/spawning-behavior","display_name":"spawning behavior","score":0.9570000171661377},{"id":"https://openalex.org/keywords/pacific-tuna","display_name":"Pacific tuna","score":0.8339999914169312},{"id":"https://openalex.org/keywords/gonad-index","display_name":"gonad index","score":0.9300000071525574},{"id":"https://openalex.org/keywords/fish-reproduction","display_name":"fish reproduction","score":0.5400000214576721}],"concepts":[{"id":"https://openalex.org/C2781471917","wikidata":"https://www.wikidata.org/wiki/Q213456","display_name":"Gonad","level":2,"score":0.7091172933578491},{"id":"https://openalex.org/C505870484","wikidata":"https://www.wikidata.org/wiki/Q180538","display_name":"Fishery","level":1,"score":0.5892926454544067},{"id":"https://openalex.org/C2777382242","wikidata":"https://www.wikidata.org/wiki/Q6017816","display_name":"Index (typography)","level":2,"score":0.509091317653656},{"id":"https://openalex.org/C86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","level":0,"score":0.39758729934692383},{"id":"https://openalex.org/C90856448","wikidata":"https://www.wikidata.org/wiki/Q431","display_name":"Zoology","level":1,"score":0.3381362557411194},{"id":"https://openalex.org/C105702510","wikidata":"https://www.wikidata.org/wiki/Q514","display_name":"Anatomy","level":1,"score":0.19199371337890625},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.0692649781703949},{"id":"https://openalex.org/C136764020","wikidata":"https://www.wikidata.org/wiki/Q466","display_name":"World Wide Web","level":1,"score":0.05869871377944946}],"mesh":[],"locations_count":1,"locations":[{"id":"mag:1589174795","doi":null,"is_oa":false,"landing_page_url":"https://ci.nii.ac.jp/naid/40018191125","pdf_url":null,"source":null,"license":null,"license_id":null,"version":null,"is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":null}],"best_oa_location":null,"sustainable_development_goals":[{"id":"https://metadata.un.org/sdg/14","display_name":"Life below water","score":1.0}],"study_designs":[],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":0,"referenced_works":[],"related_works":["https://openalex.org/W1663572816","https://openalex.org/W2223016148","https://openalex.org/W6979875275","https://openalex.org/W2566524638","https://openalex.org/W3200220277","https://openalex.org/W7071000740","https://openalex.org/W7208417686","https://openalex.org/W7036229701","https://openalex.org/W2510382654","https://openalex.org/W7049381534"],"abstract_inverted_index":null,"counts_by_year":[],"updated_date":"2026-10-25T09:29:13.331239","created_date":"2016-06-24T00:00:00"}