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Establishes the cod’s long-standing economic significance, then details how localization, length frequencies, tagged-fish recaptures, and scale studies reveal migration routes and origins between Nantucket Shoals, Chatham, and regions as far as North Carolina. Includes reviews of tagging results, possible causes, population structure, and supporting data tables and bibliography.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":40,"@type":76,"position":81},"https://docshare.wps.com/document/research-report/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/migrations-and-other-phases-in-the-life-history-of-the-cod-off-southern-new-england/182135/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/migrations-and-other-phases-in-the-life-history-of-the-cod-off-southern-new-england/182135.png","ImageObject",300,407,{"name":92,"@type":93},"Melati","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-19","2026-09-02",true,{"@type":102,"interactionType":103,"userInteractionCount":52},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"Why is the cod’s life history and migration important to fisheries?","Question",{"text":112,"@type":113},"The cod’s migrations affect where cod are found in commercial numbers and therefore how the fishing industry can anticipate abundance. The study frames migration knowledge as necessary for adjusting to declines in fish abundance.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"What methods are used to determine cod migrations?",{"text":117,"@type":113},"The document uses cod tagging and recapture data, localization by length frequencies, commercial fishery evidence, and scale studies. It also tabulates tagged fish and recaptures to support conclusions.",{"name":119,"@type":110,"acceptedAnswer":120},"What region-to-region movements does the study examine?",{"text":121,"@type":113},"It examines migrations involving Nantucket Shoals, Chatham-South Channel region, southern New England, North Carolina, and related areas, including return migrations and evidence for origins of cod populations.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},182135,1788347301,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":39,"category_name":40,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":52,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":139,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":129,"read_time":144,"preview_page_count":4},962085570644,"https://ap-avatar.wpscdn.com/davatar_994ba38a5ba835b3df7d355c54d3ed8d","MIGRATIONS AND OTHER PHASES IN THE LIFE HISTORYOF THE COD OFF SOUTHERN NEW ENGLAND  \nCONTENTS  \nPsgeResults—Continued.  \nPage  \nLocalization as shown by length fre-Cod migrations in European waters.Review of cod tagging off the NewLengths of Nantucket Shoals codLengths of Nantucket Shoals codMethods           _-…      --Tabulation of the fish tagged___--__--Lengths of Nantucket Shoals codSignificance of a reeapture record.----53Lengths of Nantucket Shoals codMigrations of cod between NantueketShoals and North Carolina__-----15Lengths of Nantnucket Shoals codEvidence of migrations as shown by59the commercial fishery--   -15Lengths of Nantucket Shoals codEvidence of migrations as shown by64tagging experiments    ---15Lengths of Nantucket Shoals codCod tagged on Nantucket Shoals1565Cod tagged in the Woods HolePossible causes for the migrations made25by southern New England cod__-Cod tagged on the ChathamWinter migration__----------2777Evidence that many Rhode Island-Size of the cod population on NantucketNorth Carolina cod come froinsouthern Massachusetts__    ---27Origin of Nantucket Shoals cod__----Southern limit of the cod_-------31Local production of cod on NantucketReturn migration of cod to New84England from southern winteringThe probable drift of cod fry from32other regions to Nantucket Shoals.   84Migration of cod to the north and eastPresence of juvenile cod on Nan-35Migrations to the Chatham-SouthImmigrations to Nantucket Shoals ofChannel region---------..35Scattering of cod to the northward  \nAge and ratc of growth of cod,partic-39ularly those on Nantucket Shoals.   96Cod which gave no evidence of migrat-Evidence from length frequencies__.41Localization as shown by tagged fish42Evidence from scale studies_   __.   1034242Tabulation of recaptures------  ---  12047Bibliography------   --------   132  \nINTRODUCTION  \nThe cod is one of the most valuable and best known of all fishes.In the westernAtlantic it has been caught from as far north as latitude 67°on the west coast ofGreenland(Jensen,1926,p.89)to as far south as Cape Hatteras,N.C.,and inEuropean waters from Spitzbergen to the region just southwest of Great Britain.A few stragglers enter the Bay of Biscay.Along our coast the most southerly groundwhere cod are to be found in commercial numbers the year round is off southernMassachusetts,and it is only from November to May when,by migrating,theyinvade the region extending from Rhode Island to North Carolina.No commer-cial fishing for cod has been carried on south of Delaware.  \nThe cod has been of great economic importance to North America from thetime of the earliest white settlers to the present era.Sette(1927,p.3)points outthat its fishery is probably the most international of any off North America,asno less than five nations take part in it.  \nDuring the 30-year period from 1896 to 1925 the annual catch of cod off theeast coast of North America has ranged from 872,000,000 to 1,339,000,000 pounds,with an average of 1,103,000,000.Although subject to fluctuations,the generalproductivity of the cod fishery neither increased nor decreased during this time.The catch for the past 30 years has been divided among the five nations con-cerned,as follows:Newfoundland,49 per cent;Canada,20 per cent;France,17 percent;United States,12 per cent;and Portugal,2 per cent.(Sette,1927,p.13.)Inthe eastern Atlantic the annual catch of cod amounts to about a billion pounds.  \nThe cod held first rank in the New England vessel fisheries for many years,but recently with the increasing number of otter trawlers and the improved methodsof preparing and marketing fillets,the haddock has assumed first place.The landingsof cod at Boston,Gloucester,and Portland,expressed in terms of fresh fish,amountedto 67,098,688 pounds,valued at $2,184,141,during 1923;¹64,241,619 pounds,valued at $2,138,306,during 1924;²82,586,677 pounds,valued at $2,644,582,in1926;³and 65,342,013 pounds,valued at $2,146,503,in 1927.4  \nEuropeans as well as Americans have studi","cbCaik1yeRz7yJ4X","https://ap.wps.com/l/cbCaik1yeRz7yJ4X","pdf",9759525,139,"English","# Contents\n## Page\n## Introduction\n## Localization as shown by length frequencies\n## Review of cod tagging off the New England coast\n## Methods; Tabulation of the fish tagged\n## Significance of a recapture record\n## Migrations between Nantucket Shoals and North Carolina\n## Evidence from the commercial fishery\n## Evidence from tagging experiments\n## Cod tagged on Nantucket Shoals; Cod tagged in the Woods Hole\n## Possible causes for migrations\n## Cod tagged on the Chatham–South Channel region\n## Evidence that many Rhode Island–North Carolina cod come from southern Massachusetts\n## Origin of Nantucket Shoals cod; Southern limit of the cod\n## Local production; Return migration\n## Drift of cod fry to Nantucket Shoals\n## Migration to the north and east; Presence of juvenile cod\n## Age and rate of growth\n## Evidence from scale studies\n## Tabulation of recaptures\n## Bibliography","[{\"question\":\"Why is the cod’s life history and migration important to fisheries?\",\"answer\":\"The cod’s migrations affect where cod are found in commercial numbers and therefore how the fishing industry can anticipate abundance. The study frames migration knowledge as necessary for adjusting to declines in fish abundance.\"},{\"question\":\"What methods are used to determine cod migrations?\",\"answer\":\"The document uses cod tagging and recapture data, localization by length frequencies, commercial fishery evidence, and scale studies. It also tabulates tagged fish and recaptures to support conclusions.\"},{\"question\":\"What region-to-region movements does the study examine?\",\"answer\":\"It examines migrations involving Nantucket Shoals, Chatham-South Channel region, southern New England, North Carolina, and related areas, including return migrations and evidence for origins of cod populations.\"}]","Migrations and Other Phases in the Life History of the Cod off Southern New England | PDF",350]