{"refrec":{"BRefID":31114,"RR":"<b>Gerritsen, H.D.; Armstrong, M.J.; Allen, M.; McCurdy, W.J.; Peel, J.A.D.</b> (2003). Variability in maturity and growth in a heavily exploited stock: whiting (<i>Merlangius merlangus</i> L.) in the Irish Sea. <i>J. Sea Res. 49(1)</i>: 69-82. <a href=\"https://dx.doi.org/10.1016/S1385-1101(02)00197-1\" target=\"_blank\">https://dx.doi.org/10.1016/S1385-1101(02)00197-1</a>","BEntID":31114,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":null,"RefStringPartII":". <i>J. Sea Res. 49(1)</i>: 69-82. <a href=\"https://dx.doi.org/10.1016/S1385-1101(02)00197-1\" target=\"_blank\">https://dx.doi.org/10.1016/S1385-1101(02)00197-1</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Gerritsen, H.D.; Armstrong, M.J.; Allen, M.; McCurdy, W.J.; Peel, J.A.D.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Gerritsen, H.D. <i>et al.</i>","Englishabstract":"This paper examines the relationships between maturity, length and age of whiting sampled on a length-stratified basis from groundfish surveys of the Irish Sea during spawning in spring 1992-2001. Maturity, defined by the triggering of vitellogenesis or milt production, was a function of both length and age. Proportions of mature individuals in 1-year-old males increased successively from almost zero in length classes below 15 cm to around 0.9 at 25 cm, whilst almost all 2-year-old males were mature from their smallest length of around 19 cm. Maturity in females was more strongly linked to age than to length. Most 1-year-old females were immature, the proportion of mature individuals not exceeding 0.3 in any length class. Most 2-year-old females were mature and immature fish were found in the smallest length classes only (20-25 cm). Almost all 3-year-olds of both sexes were mature in all length classes. Proportions of mature individuals in 1-year-olds increased substantially after 1997, particularly in males. Significant positive cross-correlation between proportion mature and mean length was found for 1-year-olds of both sexes. Length at 50% maturity (L<sub>50</sub>) averaged around 19 cm in males and 22 cm in females. Variability in L<sub>50</sub> was negatively cross-correlated with average sea surface temperature in the preceding year. There is no evidence for substantial changes in maturity of whiting since the 1950s, despite an order-of-magnitude reduction in biomass caused by high fishing mortality. Concomitant decreases in mean length-at-age and weight-at-age in recent decades indicate that conditions may have been unfavourable for compensatory changes in maturation.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Variability in maturity and growth in a heavily exploited stock: whiting (<i>Merlangius merlangus</i> L.) in the Irish Sea","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-06-03 01:30:55.627439","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":"Whiting; <i>Merlangius merlangus</i>; Irish Sea","Notes":null,"AnaPub":2003,"MonPub":null,"DateUpdate":"2003-04-04","DateCreate":"2003-01-16","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000180350200006","VABBcode":null,"OpenAcc":0,"DOI":"10.1016/S1385-1101(02)00197-1"},"refs":null,"anarec":{"AnaID":31114,"PubliDate":2003,"Pagination":"69-82","XtraPublOfAnaID":null,"ISBN":null,"Volume":"49","Issue":"1","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":43261,"SerRR":"Journal of Sea Research. 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