AGE AND GROWTH OF THE SQUID LOLIGO VULGARIS OFF THE SOUTH COAST OF PORTUGAL, USING STATOLITH ANALYSIS

AGE AND GROWTH OF THE SQUID LOLIGO VULGARIS OFF THE SOUTH COAST OF PORTUGAL, USING STATOLITH... Age composition and growth rates of the squid Loligo vulgaris (Lamark, 1797) were studied by examination of growth increments within statohths of 419 specimens (mantle length, ML, ranging from 32 to 400 mm). The squid were obtained by monthly sampling from the catches of commercial trawls off southern Portugal between March and September, 1993 The total number of growth increments in the mounted and ground statohths was counted using a semi-automatic image analysis system. ML was significantly correlated with both the statolith length, TSL and the number of increments, NI. The female statolith was slightly larger than the male statolith for the same mantle size. Growth rates of individuals showed high variability with an average estimated at 34.6 mm month −1 for males and 33.5 mm month −1 for females. Growth in length between 70 and 280 days was best described by a power function for both sexes. The growth index of the statolith (TSL/NI) decreased with individual growth. This result may be related with the onset of sexual maturation. L. vulgaris hatched throughout the year with two distinct peaks, in spring which is the mam breeding period, and in autumn. The life cycle of the L. vulgaris population on the south Portuguese shelf was completed in one year © The Malacological Society of London « Previous | Next Article » Table of Contents This Article J. Mollus. Stud. (1996) 62 (3): 359-366. doi: 10.1093/mollus/62.3.359 » Abstract Free Full Text (PDF) Free Classifications Articles Services Article metrics Alert me when cited Alert me if corrected Find similar articles Similar articles in Web of Science Add to my archive Download citation Request Permissions Citing Articles Load citing article information Citing articles via CrossRef Citing articles via Scopus Citing articles via Web of Science Citing articles via Google Scholar Google Scholar Articles by BETTENCOURT, V. Articles by GUERRA, A. Search for related content Related Content Load related web page information Share Email this article CiteULike Delicious Facebook Google+ Mendeley Twitter What's this? Search this journal: Advanced » Current Issue November 2015 81 (4) Alert me to new issues The Journal About this journal Rights & Permissions Dispatch date of the next issue This journal is a member of the Committee on Publication Ethics (COPE) We are mobile – find out more Journals Career Network Published on behalf of The Malacological Society of London Impact factor: 1.362 5-Yr impact factor: 1.618 Editor-in-Chief Dr D.G. Reid View full editorial board For Authors Instructions to authors Self-archiving policy Alerting Services Email table of contents Email Advance Access CiteTrack XML RSS feed Corporate Services Advertising sales Reprints Supplements var taxonomies = ("SCI00970", "SCI01130", "SCI01320"); Most Most Read FACTORS CONTRIBUTING TO SPATIAL HETEROGENEITY IN THE ABUNDANCE OF THE COMMON PERIWINKLE LITTORINA LITTOREA (L.) Natural aestivation and antioxidant defence in Helix pomatia: effect of acclimation to various external conditions Molluscan marginalia: hidden morphological diversity at the bivalve shell edge A new operational classification of the Conoidea (Gastropoda) Morph frequency in British Cepaea nemoralis: what has changed in half a century? » View all Most Read articles Most Cited ON THE ORIGIN AND EVOLUTION OF MAJOR GASTROPOD GROUPS, WITH SPECIAL REFERENCE TO THE STREPTONEURA Worldwide phylogeography of limpets of the order Patellogastropoda: molecular, morphological and palaeontological evidence COMPOSITION AND SPECIES RICHNESS OF MOLLUSCAN COMMUNITIES IN RELATION TO VEGETATION AND WATER CHEMISTRY IN THE WESTERN CARPATHIAN SPRING FENS: THE POOR-RICH GRADIENT Reconstruction of the phylogeny of the Opisthobranchia (Mollusca: Gastropoda) by means of 18s and 28s rRNA gene sequences THE MOLLUSCAN RHOGOCYTE (PORE-CELL, BLASENZELLE, CELLULE NUCALE), AND ITS SIGNIFICANCE FOR IDEAS ON NEPHRIDIAL EVOLUTION » View all Most Cited articles Disclaimer: Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department. Online ISSN 1464-3766 - Print ISSN 0260-1230 Copyright © 2015 The Malacological Society of London Oxford Journals Oxford University Press Site Map Privacy Policy Cookie Policy Legal Notices Frequently Asked Questions Other Oxford University Press sites: Oxford University Press Oxford Journals China Oxford Journals Japan Academic & Professional books Children's & Schools Books Dictionaries & Reference Dictionary of National Biography Digital Reference English Language Teaching Higher Education Textbooks International Education Unit Law Medicine Music Online Products & Publishing Oxford Bibliographies Online Oxford Dictionaries Online Oxford English Dictionary Oxford Language Dictionaries Online Oxford Scholarship Online Reference Rights and Permissions Resources for Retailers & Wholesalers Resources for the Healthcare Industry Very Short Introductions World's Classics function fnc_onDomLoaded() { var query_context = getQueryContext(); PF_initOIUnderbar(query_context,":QS:default","","JRN"); PF_insertOIUnderbar(0); }; if (window.addEventListener) { window.addEventListener('load', fnc_onDomLoaded, false); } else if (window.attachEvent) { window.attachEvent('onload', fnc_onDomLoaded); } var gaJsHost = (("https:" == document.location.protocol) ? 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AGE AND GROWTH OF THE SQUID LOLIGO VULGARIS OFF THE SOUTH COAST OF PORTUGAL, USING STATOLITH ANALYSIS

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Oxford University Press
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Copyright © 2015 The Malacological Society of London
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0260-1230
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1464-3766
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10.1093/mollus/62.3.359
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Abstract

Age composition and growth rates of the squid Loligo vulgaris (Lamark, 1797) were studied by examination of growth increments within statohths of 419 specimens (mantle length, ML, ranging from 32 to 400 mm). The squid were obtained by monthly sampling from the catches of commercial trawls off southern Portugal between March and September, 1993 The total number of growth increments in the mounted and ground statohths was counted using a semi-automatic image analysis system. ML was significantly correlated with both the statolith length, TSL and the number of increments, NI. The female statolith was slightly larger than the male statolith for the same mantle size. Growth rates of individuals showed high variability with an average estimated at 34.6 mm month −1 for males and 33.5 mm month −1 for females. Growth in length between 70 and 280 days was best described by a power function for both sexes. The growth index of the statolith (TSL/NI) decreased with individual growth. This result may be related with the onset of sexual maturation. L. vulgaris hatched throughout the year with two distinct peaks, in spring which is the mam breeding period, and in autumn. The life cycle of the L. vulgaris population on the south Portuguese shelf was completed in one year © The Malacological Society of London « Previous | Next Article » Table of Contents This Article J. Mollus. Stud. (1996) 62 (3): 359-366. doi: 10.1093/mollus/62.3.359 » Abstract Free Full Text (PDF) Free Classifications Articles Services Article metrics Alert me when cited Alert me if corrected Find similar articles Similar articles in Web of Science Add to my archive Download citation Request Permissions Citing Articles Load citing article information Citing articles via CrossRef Citing articles via Scopus Citing articles via Web of Science Citing articles via Google Scholar Google Scholar Articles by BETTENCOURT, V. Articles by GUERRA, A. Search for related content Related Content Load related web page information Share Email this article CiteULike Delicious Facebook Google+ Mendeley Twitter What's this? Search this journal: Advanced » Current Issue November 2015 81 (4) Alert me to new issues The Journal About this journal Rights & Permissions Dispatch date of the next issue This journal is a member of the Committee on Publication Ethics (COPE) We are mobile – find out more Journals Career Network Published on behalf of The Malacological Society of London Impact factor: 1.362 5-Yr impact factor: 1.618 Editor-in-Chief Dr D.G. Reid View full editorial board For Authors Instructions to authors Self-archiving policy Alerting Services Email table of contents Email Advance Access CiteTrack XML RSS feed Corporate Services Advertising sales Reprints Supplements var taxonomies = ("SCI00970", "SCI01130", "SCI01320"); Most Most Read FACTORS CONTRIBUTING TO SPATIAL HETEROGENEITY IN THE ABUNDANCE OF THE COMMON PERIWINKLE LITTORINA LITTOREA (L.) Natural aestivation and antioxidant defence in Helix pomatia: effect of acclimation to various external conditions Molluscan marginalia: hidden morphological diversity at the bivalve shell edge A new operational classification of the Conoidea (Gastropoda) Morph frequency in British Cepaea nemoralis: what has changed in half a century? » View all Most Read articles Most Cited ON THE ORIGIN AND EVOLUTION OF MAJOR GASTROPOD GROUPS, WITH SPECIAL REFERENCE TO THE STREPTONEURA Worldwide phylogeography of limpets of the order Patellogastropoda: molecular, morphological and palaeontological evidence COMPOSITION AND SPECIES RICHNESS OF MOLLUSCAN COMMUNITIES IN RELATION TO VEGETATION AND WATER CHEMISTRY IN THE WESTERN CARPATHIAN SPRING FENS: THE POOR-RICH GRADIENT Reconstruction of the phylogeny of the Opisthobranchia (Mollusca: Gastropoda) by means of 18s and 28s rRNA gene sequences THE MOLLUSCAN RHOGOCYTE (PORE-CELL, BLASENZELLE, CELLULE NUCALE), AND ITS SIGNIFICANCE FOR IDEAS ON NEPHRIDIAL EVOLUTION » View all Most Cited articles Disclaimer: Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department. Online ISSN 1464-3766 - Print ISSN 0260-1230 Copyright © 2015 The Malacological Society of London Oxford Journals Oxford University Press Site Map Privacy Policy Cookie Policy Legal Notices Frequently Asked Questions Other Oxford University Press sites: Oxford University Press Oxford Journals China Oxford Journals Japan Academic & Professional books Children's & Schools Books Dictionaries & Reference Dictionary of National Biography Digital Reference English Language Teaching Higher Education Textbooks International Education Unit Law Medicine Music Online Products & Publishing Oxford Bibliographies Online Oxford Dictionaries Online Oxford English Dictionary Oxford Language Dictionaries Online Oxford Scholarship Online Reference Rights and Permissions Resources for Retailers & Wholesalers Resources for the Healthcare Industry Very Short Introductions World's Classics function fnc_onDomLoaded() { var query_context = getQueryContext(); PF_initOIUnderbar(query_context,":QS:default","","JRN"); PF_insertOIUnderbar(0); }; if (window.addEventListener) { window.addEventListener('load', fnc_onDomLoaded, false); } else if (window.attachEvent) { window.attachEvent('onload', fnc_onDomLoaded); } var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www."); document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E")); try { var pageTracker = _gat._getTracker("UA-189672-16"); pageTracker._setDomainName(".oxfordjournals.org"); pageTracker._trackPageview(); } catch(err) {}

Journal

Journal of Molluscan StudiesOxford University Press

Published: Aug 26, 1996

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