{"doi":"10.1111/j.1469-7998.1981.tb03450.x","title":"Gametogenesis in the cirratulid polychaetes <i>Dodecaceria concharum</i> and <i>D. caulleryi</i>","abstract":"<jats:p>In Northumberland <jats:italic>Dodecaceria concharum</jats:italic> coexists in the same habitat as D. <jats:italic>caulleryi</jats:italic>. Morphologically both species are very similar but reproductively they are not. D. <jats:italic>concharum</jats:italic> is a parthenogenetic atoke while <jats:italic>D. caulleryi</jats:italic> has an asexual cycle that ends in an epitokous sexual phase. Histologically the gonad of both species had six cell types and the number of cells in each type were found during gametogenesis. In <jats:italic>D. concharum</jats:italic> the period over which gametogenesis occurs was followed from the increase in size of free coelomic oocytes and numbers of body segments. In <jats:italic>D. caulleryi</jats:italic> the period was followed by means of changes in the asexual cycle and metamorphosis into epitokes. In spite of the differences in the methods of reproduction of the two species gametogenesis of each was found to be almost identical. Only oogenesis could be compared since <jats:italic>D. concharum</jats:italic> does not have males. Prior to spawning in both species the production of oocytes by the ovary appeared to be inhibited. Possible hormonal mechanisms used to control atokous and epitokous spawning are discussed. From the histology of the gonads and oocytes <jats:italic>D. concharum</jats:italic> appeared to have half the number of chromosomes of <jats:italic>D. caulleryi.</jats:italic></jats:p>","journal":"Journal of Zoology","year":1981,"id":42645,"datarank":0.5008722622495243,"base_score":1.9459101490553132,"endowment":1.9459101490553132,"self_citation_contribution":0.29188652235829704,"citation_network_contribution":0.20898573989122723,"self_endowment_contribution":0.29188652235829704,"citer_contribution":0.20898573989122723,"corpus_percentile":null,"corpus_rank":null,"citation_count":6,"citer_count":4,"citers_with_citation_signal":4,"citers_with_endowment":4,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":null,"is_data_producer":false,"deposit_databanks":null,"is_oa":false,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":null,"fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":203864,"name":"Peter H. Gibson","orcid":null,"position":0,"is_corresponding":false}],"reference_count":0,"raw_metadata":{"has_enrichment":true,"base_score":1.9459101490553132,"endowment":1.9459101490553132,"datacite_reuse_total":0,"file_count":0,"downloads":0,"views":0,"has_version_chain":false,"is_dataset":false,"is_oa":false,"pmid":"18998881","pmcid":null,"openalex_id":"https://openalex.org/W2027159790","authors":[],"funders":[],"total_grants":0,"fwci":0.0,"citation_percentile":0.14206288,"influential_citations":0,"citation_trend":[{"year":2015,"count":1}],"oa_status":"closed","license":"http://onlinelibrary.wiley.com/termsAndConditions#vor","oa_locations":[{"url":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1469-7998.1981.tb03450.x","host_type":"publisher"},{"url":"https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1469-7998.1981.tb03450.x","host_type":"publisher"},{"url":"https://zslpublications.onlinelibrary.wiley.com/doi/pdf/10.1111/j.1469-7998.1981.tb03450.x","host_type":"publisher"},{"url":"https://doi.org/10.1111/j.1469-7998.1981.tb03450.x","host_type":"journal"}],"fields_of_study":["Marine Biology and Ecology Research","Aquatic Invertebrate Ecology and Behavior","Mollusks and Parasites Studies","Biology"],"mesh_terms":[],"keywords":["Gametogenesis","Biology","Oogenesis","Gonad","Coelom","Parthenogenesis","Reproduction","Zoology","Metamorphosis","Sexual reproduction","Ovary","Oocyte","Ecology","Embryo","Anatomy","Larva","Cell biology","Genetics","Embryogenesis"],"sdg_mappings":[{"sdg_number":0,"sdg_label":"Life in Land"},{"sdg_number":0,"sdg_label":"Life below water"}],"linked_datasets":[],"clinical_trials":[],"software_tools":[],"database_accessions":[],"source":"live","citation_network_status":"fetched"},"created_at":"2026-06-14T04:29:26.263932Z","pmid":null,"pmcid":null,"fwci":null,"citation_percentile":null,"influential_citations":0,"oa_status":null,"license":null,"views":0,"total_file_size_bytes":0,"version_count":0,"fair_f":null,"fair_a":null,"fair_i":null,"fair_r":null,"fair_zscore":null,"fair_rationale":null,"fair_model":null,"fair_agent_version":null,"fair_fulltext_source":null,"fair_has_llm":null,"fair_computed_at":null,"clinical_trials":[],"software_tools":[],"db_accessions":[],"linked_datasets":[],"topics":[]}