{"refrec":{"BRefID":141360,"RR":"<b>Romeo, T.; Castriota, L.; Consoli, P.; Falautano, M.; Florio, G.; Perdichizzi, F.; Andaloro, F.; Rinelli, P.</b> (2009). Bathymetric and longitudinal distribution analyysis of the rockfish Helicolenus Dactylopterus (Delaroche, 1809) in the southern Tyrrhenian Sea (central Mediterranean). <i>Mediterr. Mar. Sci. 10(1)</i>: 73-82. <a href=\"https://dx.doi.org/10.12681/mms.123\" target=\"_blank\">https://dx.doi.org/10.12681/mms.123</a>","BEntID":134682,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":null,"RefStringPartII":". <i>Mediterr. Mar. Sci. 10(1)</i>: 73-82. <a href=\"https://dx.doi.org/10.12681/mms.123\" target=\"_blank\">https://dx.doi.org/10.12681/mms.123</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Romeo, T.; Castriota, L.; Consoli, P.; Falautano, M.; Florio, G.; Perdichizzi, F.; Andaloro, F.; Rinelli, P.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Romeo, T. <i>et al.</i>","Englishabstract":"This study provides information on bathymetric and longitudinal distribution heterogeneity of the rockfish <i>Helicolenus dactylopterus</i> in the southern Tyrrhenian Sea. Data were drawn from experimental bottomtrawl (1996-2002) plus bottom trap (2001-02) surveys. The frequency of occurrence and mean relative density(N/km2) and biomass (kg/km2) indexes were calculated for two survey seasons (spring and autumn), four geographic sectors and three depth strata. MANOVA was used to test fish abundance among years, sectorsand strata. Analysis of the length-frequency distributions was carried out by two-way (gears and depths)ANOVA, post hoc multiple comparisons for testing differences among depths and Student’s t test for testingdifferences between gears. Length-weight relationship was also estimated and the allometric coefficient wastested with the Student’s t test. The results showed a significant positive bathymetric gradient of sizes both fortrawl and trap surveys; at same depths, fish caught by traps were significantly longer than those caught bytrawl. In spring surveys, significant differences were found among strata for both abundance indexes; inautumn surveys, significant differences between depth strata were found only for density indices. The distribution and abundance patterns of H. <i>dactylopterus</i> along the southern Tyrrhenian Sea was homogeneous among sectors. Length-weight relationship showed a significant positive allometric growth.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Bathymetric and longitudinal distribution analyysis of the rockfish Helicolenus Dactylopterus (Delaroche, 1809) in the southern Tyrrhenian Sea (central Mediterranean)","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-04-23 01:32:09.612767","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"Helicolenus dactylopterus; Deep-sea rockfish; Bottom trawl; Bottomtraps; Tyrrhenian Sea; Central Mediterranean","OtherDescriptors":null,"Notes":null,"AnaPub":2009,"MonPub":null,"DateUpdate":"2018-02-13","DateCreate":"2009-09-24","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000269664600006","VABBcode":null,"OpenAcc":1,"DOI":"10.12681/mms.123"},"refs":null,"anarec":{"AnaID":141360,"PubliDate":2009,"Pagination":"73-82","XtraPublOfAnaID":null,"ISBN":null,"Volume":"10","Issue":"1","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":44165,"SerRR":"Mediterranean Marine Science. 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