{"refrec":{"BRefID":330885,"RR":"<b>Uriz, M.J.; Maldonado, M.; Turon, X.; Martí, R.</b> (1998). How do reproductive output, larval behaviour, and recruitment contribute to adult spatial patterns in Mediterranean encrusting sponges? <i>Mar. Ecol. Prog. Ser. 167</i>: 137-148. <a href=\"https://dx.doi.org/10.3354/meps167137\" target=\"_blank\">https://dx.doi.org/10.3354/meps167137</a>","BEntID":324495,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":1,"RefStringPartII":" <i>Mar. Ecol. Prog. Ser. 167</i>: 137-148. <a href=\"https://dx.doi.org/10.3354/meps167137\" target=\"_blank\">https://dx.doi.org/10.3354/meps167137</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Uriz, M.J.; Maldonado, M.; Turon, X.; Martí, R.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Uriz, M.J. <i>et al.</i>","Englishabstract":"We studied the abundance and spatial pattern of 2 Mediterranean encrusting sponges, <i>Crambe crambe</i> (highly toxic) and <i>Scopalina lophyropoda</i> (non-toxic), at 4 spatial scales (0.5, 1, 2 and 4 m<sup>2</sup>). We also examined the reproductive output, larval behaviour and recruitment in these species, and assessed the relative importance of these parameters in explaining the abundance and spatial patterns of adults. We also determined, in field experiments, whether the presence of adults induces or inhibits recruitment in these 2 species. We found that<i> C. crambe</i> was much more abundant than <i>S. lophyropoda</i> at the site studied in both number of individuals per m<sup>2</sup> (67 ± 2.7 vs 10.2 ± 2.1, mean ± SE) and coverage (47 ± 1.9 vs 11.1 ± 1.4%). At the smallest scale sampled (0.5 m<sup>2</sup>), both species showed an aggregated pattern. Aggregation was also detected for <i>S. lophyropoda</i>, but not for <i>C. crambe,</i> at the scales of 1 and 2 m<sup>2</sup>. The number of embryos incubated per cm<sup>2</sup> by <i>C. crambe</i> and <i>S. lophyropoda</i> was 76.2 ± 12.5 and 14 ± 1.7 (mean ± SE), respectively. We estimated that the potential number of larvae of <i>C. crambe</i> released into the water column was about 20 times higher than that of <i>S. lophyropoda</i>. Larval behaviour was monitored in the laboratory and in the field. Larvae of <i>S. lophyropoda</i> did not swim away from the release point. They maintained a vertical posture that minimised horizontal dispersal, and soon began crawling. In contrast, the larvae of <i>C. crambe</i> swam actively and had a comparatively delayed crawling phase. Recruitment of the 2 species in scraped quadrats surrounded by individuals of <i>C. crambe</i> and <i>S. lophyropoda,</i> and in controls (rocky areas with no sponges), was monitored weekly for a month. Recruitment of both species was higher in scraped quadrats surrounded by conspecifics. This effect was notably more marked for <i>S. lophyropoda </i>than for <i>C. crambe</i> recruits. The toxicity of <i>C. crambe</i> did not inhibit settlement of <i>S. lophyropoda</i> with respect to controls. The mean number of recruits per unit surface area after 1 mo (all substrates pooled) was ca 3.5 times higher for<i>C. crambe</i> than for <i>S. lophyropoda</i>. This difference was smaller than expected given that larval production of <i>C. crambe</i> was ca 20 times higher. This indicates that a significant proportion of <i>C. crambe</i>'s offspring did not contribute to the maintenance of the local population. The aggregated pattern of <i>S. lophyropoda</i> at scales ranging from 0.5 to 2 m<sup>2<i></i></sup>and its discontinuous geographic distribution may be partially explained by strong phylopatry of its larvae due to their poor swimming ability and limited dispersal. The dominance of <i>C. crambe</i> in littoral assemblages, its random distribution at scales larger than 0.5 m<sup>2</sup>, and its ubiquity along the littoral are traits that are consistent with high reproductive output, the swimming behaviour of larvae which facilitates wide dispersal, and patterns of recruitment found in this study. Therefore, <i>S. lophyropoda</i> populations appear to be maintained by offspring supplied by autochthonous individuals while populations of<i> C. crambe </i>appear to be open, with a potentially significant flow of larvae between them.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"How do reproductive output, larval behaviour, and recruitment contribute to adult spatial patterns in Mediterranean encrusting sponges?","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-04-23 01:33:06.820963","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"Reproductive output · Larval behaviour · Settlement · Recruitment · Spatial patterns · Encrusting sponges · Mediterranean Sea","OtherDescriptors":null,"Notes":null,"AnaPub":1998,"MonPub":null,"DateUpdate":"2020-11-13","DateCreate":"2020-11-13","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000074685500012","VABBcode":null,"OpenAcc":1,"DOI":"10.3354/meps167137"},"refs":null,"anarec":{"AnaID":330885,"PubliDate":1998,"Pagination":"137-148","XtraPublOfAnaID":null,"ISBN":null,"Volume":"167","Issue":null,"BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":43354,"SerRR":"Marine Ecology Progress Series. 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