{"id":15078,"date":"2021-06-22T10:08:30","date_gmt":"2021-06-22T14:08:30","guid":{"rendered":"https:\/\/ncseagrant.ncsu.edu\/coastwatch\/?page_id=15078"},"modified":"2024-07-09T09:36:05","modified_gmt":"2024-07-09T13:36:05","slug":"hook-line-science-summer-2021","status":"publish","type":"post","link":"https:\/\/ncseagrant.ncsu.edu\/coastwatch\/hook-line-science-summer-2021\/","title":{"rendered":"Hook, Line &amp; Science"},"content":{"rendered":"\n\n\n\n\n<p class=\"has-text-align-center\">The award-winning series curated by Scott Baker and Sara Mirabilio, fisheries specialists with North Carolina Sea Grant<\/p>\n\n\n\n<aside class=\"wp-block-ncst-sandwich-narrative with-image\"><div class=\"ncst-sandwich-narrative\"><div class=\"sandwich-narrative__image-container\"><img loading=\"lazy\" decoding=\"async\" width=\"1420\" height=\"976\" class=\"sandwich-narrative__image wp-image-15198\" alt=\"\" src=\"https:\/\/ncseagrant.ncsu.edu\/coastwatch\/wp-content\/uploads\/sites\/13\/2021\/06\/image-2.jpg\" srcset=\"https:\/\/ncseagrant.ncsu.edu\/coastwatch\/wp-content\/uploads\/sites\/13\/2021\/06\/image-2.jpg 1420w, https:\/\/ncseagrant.ncsu.edu\/coastwatch\/wp-content\/uploads\/sites\/13\/2021\/06\/image-2-300x206.jpg 300w, https:\/\/ncseagrant.ncsu.edu\/coastwatch\/wp-content\/uploads\/sites\/13\/2021\/06\/image-2-1024x704.jpg 1024w, https:\/\/ncseagrant.ncsu.edu\/coastwatch\/wp-content\/uploads\/sites\/13\/2021\/06\/image-2-768x528.jpg 768w\" sizes=\"(max-width: 1420px) 100vw, 1420px\" \/><\/div><div class=\"sandwich-narrative__text-container\"><h2 class=\"sandwich-narrative__heading\">How Is Overfishing Affecting Southern Flounder?<\/h2>\n\n<p>Acoustic Tracking and Conventional tagging Provide Crucial Information to Plan for the Sustainability of the Species.&nbsp;<\/p>\n\n\n\n\n<div class=\"wp-block-ncst-collapsible-more ncst-collapsible-more\"><div class=\"collapsible-more__collapsed-content-container collapse panel-collapse \" id=\"collapsible-more-0\" aria-labelledby=\"collapsible-more-heading-0\">\n<p><strong>Research Need<\/strong><\/p>\n\n\n\n<p>Southern flounder support valuable commercial and recreational fisheries in North Carolina, but the stock has experienced high harvest rates since the 1990s and currently is overfished. Fisheries managers have implemented minimum size limits, gear restrictions, and seasonal closures with the goals of reducing harvest and rebuilding the stock.<\/p>\n\n\n\n<p>Stock assessments require information on fishing and natural mortality to evaluate whether management goals are working. Our objective was to provide the first direct estimates of natural mortality for southern flounder using acoustic tracking technology, while also providing updated estimates of fishing mortality from conventional tagging.<\/p>\n\n\n\n<p><strong>What did they study?<\/strong><\/p>\n\n\n\n<p>We combined acoustic telemetry and conventional tagging to estimate both fishing and natural mortality for southern flounder in North Carolina.<\/p>\n\n\n\n<p>We tracked the movements of 271 southern flounder implanted with acoustic transmitters in the New River estuary from 2014 to 2016. We estimated natural mortality using information from fish movements within the estuary, while recaptures and reporting of external tags from these same fish also provided information on fishing mortality.<\/p>\n\n\n\n<p>Our acoustic receiver network additionally allowed us to detect fish migrating out of the New River estuary during the fall, the period when mature fish emigrate from coastal bays and rivers to spawn in offshore waters. Detections of these migration events allowed us to separate emigration from mortality.<\/p>\n\n\n\n<p>Additional data provided by the North Carolina Division of Marine Fisheries\u2019 southern flounder tagging program allowed us to estimate fishing mortality rates for tagged fish across the state.<\/p>\n\n\n\n<p><strong>What did they find?<\/strong><\/p>\n\n\n\n<p>Seasonal patterns of fishing mortality were consistent across North Carolina and, in particular, in the New River estuary. Elevated harvest rates of southern flounder began in late spring and continued through December each year.<\/p>\n\n\n\n<p>Our estimates of fishing mortality indicate that overfishing might still occur but also show a general pattern of lower harvest rates than during previous periods of overfishing.<\/p>\n\n\n\n<p>Natural mortality of southern flounder was a significant contributor to the total annual mortality rate, and our natural mortality estimates were in general agreement with previous estimates from predictive models.<\/p>\n\n\n\n<p>Emigration from the New River estuary was high and accounted for more than 40% of southern flounder. Separating emigration from mortality was critical to improving the accuracy of our mortality estimates.<\/p>\n\n\n\n<p><strong>What else did they find?<\/strong><\/p>\n\n\n\n<p>The telemetry study demonstrated that migration is highly seasonal. Approximately 99% of the southern flounder in our study left the estuary between October and December. Updated information on the timing of southern flounder migration could allow fishery managers to set seasonal closures of the fishery, providing greater protection for mature fish that migrate offshore to spawn.<\/p>\n\n\n\n<p><strong>Anything else?<\/strong><\/p>\n\n\n\n<p>The most recent stock assessment for southern flounder determined that harvest rates are still above management goals and stock size is still below these goals. Our estimates of mortality and emigration should provide managers with benchmarks to evaluate future stock assessments and inform options for achieving a sustainable southern flounder fishery.<\/p>\n\n\n\n<p><em>Summary compiled by Trevor Scheffel, data coordinator at the Atlantic Coastal Cooperative Statistics Program in Arlington, Virginia.<\/em><\/p>\n<\/div><a class=\"collapsible-more__interaction-cta collapsed\" href=\"#collapsible-more-0\" id=\"collapsible-more-heading-0\" data-toggle=\"collapse\" data-target=\"#collapsible-more-0\" aria-controls=\"collapsible-more-0\"><span class=\"collapsible-more__expansion-indicator\"><span class=\"ncst-plus-minus-toggle\"><\/span><\/span><span class=\"collapsible-more__text\">Expand to read more<\/span><span class=\"collapsible-more__text-collapse\">Collapse<\/span><\/a><\/div>\n<\/div><\/div><\/aside>\n\n\n\n<aside class=\"wp-block-ncst-sandwich-narrative with-image\"><div class=\"ncst-sandwich-narrative\"><div class=\"sandwich-narrative__image-container\"><img loading=\"lazy\" decoding=\"async\" width=\"2560\" height=\"1707\" class=\"sandwich-narrative__image wp-image-15200\" alt=\"\" src=\"https:\/\/ncseagrant.ncsu.edu\/coastwatch\/wp-content\/uploads\/sites\/13\/2021\/06\/image-3-or-4-NC.CarteretCounty.7584-NC-State-photos-scaled.jpg\" srcset=\"https:\/\/ncseagrant.ncsu.edu\/coastwatch\/wp-content\/uploads\/sites\/13\/2021\/06\/image-3-or-4-NC.CarteretCounty.7584-NC-State-photos-scaled.jpg 2560w, https:\/\/ncseagrant.ncsu.edu\/coastwatch\/wp-content\/uploads\/sites\/13\/2021\/06\/image-3-or-4-NC.CarteretCounty.7584-NC-State-photos-300x200.jpg 300w, https:\/\/ncseagrant.ncsu.edu\/coastwatch\/wp-content\/uploads\/sites\/13\/2021\/06\/image-3-or-4-NC.CarteretCounty.7584-NC-State-photos-1024x683.jpg 1024w, https:\/\/ncseagrant.ncsu.edu\/coastwatch\/wp-content\/uploads\/sites\/13\/2021\/06\/image-3-or-4-NC.CarteretCounty.7584-NC-State-photos-768x512.jpg 768w, https:\/\/ncseagrant.ncsu.edu\/coastwatch\/wp-content\/uploads\/sites\/13\/2021\/06\/image-3-or-4-NC.CarteretCounty.7584-NC-State-photos-1536x1024.jpg 1536w, https:\/\/ncseagrant.ncsu.edu\/coastwatch\/wp-content\/uploads\/sites\/13\/2021\/06\/image-3-or-4-NC.CarteretCounty.7584-NC-State-photos-2048x1365.jpg 2048w\" sizes=\"(max-width: 1500px) 100vw, 1500px\" \/><\/div><div class=\"sandwich-narrative__text-container\"><h2 class=\"sandwich-narrative__heading\">Where on the East Coast Do Salt Water Anglers Encounter the Most Species of Fish?<\/h2>\n\n<p>Based on interviews with anglers, North Carolina offers a more diverse array of species than any other state but one on the Atlantic seaboard.&nbsp;<\/p>\n\n\n\n\n<div class=\"wp-block-ncst-collapsible-more ncst-collapsible-more\"><div class=\"collapsible-more__collapsed-content-container collapse panel-collapse \" id=\"collapsible-more-1\" aria-labelledby=\"collapsible-more-heading-1\">\n<p>If you\u2019re a fan of fisheries facts, stats, and trivia, you may have enjoyed a previous Hook, Line &amp; Science piece that used data from the annual publication Fisheries of the United States to determine which coast (the Gulf of Mexico or the Atlantic) was responsible for the largest saltwater catch by anglers. We\u2019re continuing that fisheries trivia with this article.<\/p>\n\n\n\n<p><strong>Research Need<\/strong><\/p>\n\n\n\n<p>Staff with the North Carolina Division of Marine Fisheries (DMF) interview thousands of saltwater anglers each year on the docks or as they return from fishing trips. One goal of those interviews is to put eyes on the fish that anglers keep in order to accurately identify fish as part of the Marine Recreational Information Program (MRIP).<\/p>\n\n\n\n<p>I\u2019ve always wanted to know which state along the Atlantic Coast has the highest number of unique species or species groups, but this information isn\u2019t readily available.<\/p>\n\n\n\n<p>To find the answer, I submitted a data request to DMF staff about the unique species saltwater anglers encountered on the 14 East Coast states from 2015 to 2019. This included kept and released fish, either observed at the dock or reported by fishers.<\/p>\n\n\n\n<p><strong>What did they find?<\/strong><\/p>\n\n\n\n<p>Saltwater anglers along the 14 East Coast states encountered 509 unique species or species groups from 2015 to 2019.<\/p>\n\n\n\n<p>The states with the most species in saltwater angler catch were Florida (398), North Carolina (258), and South Carolina (190). The states with the fewest species in the catch were Maine (60), New Hampshire (62), and Connecticut (87).<\/p>\n\n\n\n<p>Florida possibly has an unfair advantage because the data includes species encountered on both the Atlantic and Gulf of Mexico coasts.<\/p>\n\n\n\n<p><strong>Anything else?<\/strong><\/p>\n\n\n\n<p>Numerous factors influence the species count by state. But if we look at the latitude of each state and the length of Atlantic shore coastline, we can begin to see some interesting trends.<\/p>\n\n\n\n<p>Notably, anglers encounter more species as latitude decreases (as we move toward the equator) and as coastline increases (which provides more available habitat).<\/p>\n\n\n\n<p>So if you fish in coastal North Carolina waters, you\u2019ll have a great chance to encounter something new or perhaps unusual \u2014 more to think about next time you get a bite on your hook.<\/p>\n\n\n\n<p><em>Summary compiled by Scott Baker<\/em><\/p>\n<\/div><a class=\"collapsible-more__interaction-cta collapsed\" href=\"#collapsible-more-1\" id=\"collapsible-more-heading-1\" data-toggle=\"collapse\" data-target=\"#collapsible-more-1\" aria-controls=\"collapsible-more-1\"><span class=\"collapsible-more__expansion-indicator\"><span class=\"ncst-plus-minus-toggle\"><\/span><\/span><span class=\"collapsible-more__text\">Expand to read more<\/span><span class=\"collapsible-more__text-collapse\">Collapse<\/span><\/a><\/div>\n<\/div><\/div><\/aside>\n\n\n\n<aside class=\"wp-block-ncst-sandwich-narrative with-image\"><div class=\"ncst-sandwich-narrative\"><div class=\"sandwich-narrative__image-container\"><img loading=\"lazy\" decoding=\"async\" width=\"1709\" height=\"2560\" class=\"sandwich-narrative__image wp-image-15201\" alt=\"\" src=\"https:\/\/ncseagrant.ncsu.edu\/coastwatch\/wp-content\/uploads\/sites\/13\/2021\/06\/image-4-or-3-SG.NewHanover.4086-NC-State-University-scaled.jpg\" srcset=\"https:\/\/ncseagrant.ncsu.edu\/coastwatch\/wp-content\/uploads\/sites\/13\/2021\/06\/image-4-or-3-SG.NewHanover.4086-NC-State-University-scaled.jpg 1709w, https:\/\/ncseagrant.ncsu.edu\/coastwatch\/wp-content\/uploads\/sites\/13\/2021\/06\/image-4-or-3-SG.NewHanover.4086-NC-State-University-200x300.jpg 200w, https:\/\/ncseagrant.ncsu.edu\/coastwatch\/wp-content\/uploads\/sites\/13\/2021\/06\/image-4-or-3-SG.NewHanover.4086-NC-State-University-683x1024.jpg 683w, https:\/\/ncseagrant.ncsu.edu\/coastwatch\/wp-content\/uploads\/sites\/13\/2021\/06\/image-4-or-3-SG.NewHanover.4086-NC-State-University-768x1151.jpg 768w, https:\/\/ncseagrant.ncsu.edu\/coastwatch\/wp-content\/uploads\/sites\/13\/2021\/06\/image-4-or-3-SG.NewHanover.4086-NC-State-University-1025x1536.jpg 1025w, https:\/\/ncseagrant.ncsu.edu\/coastwatch\/wp-content\/uploads\/sites\/13\/2021\/06\/image-4-or-3-SG.NewHanover.4086-NC-State-University-1367x2048.jpg 1367w\" sizes=\"(max-width: 1500px) 100vw, 1500px\" \/><\/div><div class=\"sandwich-narrative__text-container\"><h2 class=\"sandwich-narrative__heading\"><strong>What Kinds of Anglers are the Best at What They Do?<\/strong><\/h2>\n\n<p>Surprising research suggests that differences among anglers don&#8217;t matter much when we look at how many fish they actually catch.&nbsp;<\/p>\n\n\n\n\n<div class=\"wp-block-ncst-collapsible-more ncst-collapsible-more\"><div class=\"collapsible-more__collapsed-content-container collapse panel-collapse \" id=\"collapsible-more-2\" aria-labelledby=\"collapsible-more-heading-2\">\n<p>When it comes to surf fishing, it\u2019s hard to beat the coastline of North Carolina. Little data is available on onshore fishing, however, while the number of anglers continues to increase.<\/p>\n\n\n\n<p>Let\u2019s look at a study from the French Riviera that tries to quantify the angler population and related implications for management. Like North Carolina\u2019s coastline, the region has a highly diverse group of anglers, from locals to seasonal fluxes of tourists, who bring new fishing practices and different levels of awareness about rules and regulations.<\/p>\n\n\n\n<p><strong>Research Need<\/strong><\/p>\n\n\n\n<p>A lack of data makes monitoring and assessment difficult in many recreational fisheries. State, regional, and federal partners use in-person, telephone, and mail surveys to measure the number of trips saltwater anglers take and the number of fish they catch, but estimating total recreational effort is a statistical challenge.<\/p>\n\n\n\n<p>Fishery policies traditionally were based on stock status indicators such as Catch Per Unit of Effort, for which \u201ceffort\u201d is the amount of time and fishing gear in the water. (Catch Per Unit of Effort directly relates to stock abundance.) The diversity of angler practices and behaviors may influence angling efficiency and raises the question of the validity of using Catch Per Unit of Effort to set policies in marine recreational fishing.<\/p>\n\n\n\n<p><strong>What did they study?<\/strong><\/p>\n\n\n\n<p>From November 2017 to October 2018, a research team visited the Natural Marine Park of the Gulf of Lion in France, the second largest marine park in the Mediterranean Sea. They first counted the number of recreational fishers, and then selected a subset to participate in a 20-minute interview.<\/p>\n\n\n\n<p>The questionnaire focused on a wide range of variables covering socioeconomic data and fishing methods. They also asked anglers about the size and species of their catch.<\/p>\n\n\n\n<p>By analyzing this large dataset, the researchers were able to describe the composition of the onshore fishing population, its fishing strategies, and the impact of both on Catch Per Unit of Effort.<\/p>\n\n\n\n<p><strong>What did they find?<\/strong><\/p>\n\n\n\n<p>Over the study period, the research team counted 795 marine recreational fishers within the park and interviewed 212 of them. All anglers surveyed, in the end, were men. Most were between 50 and 59 years of age with little (1 to 5 years) to intermediate (11 to 20 years) fishing experience.<\/p>\n\n\n\n<p>The majority of surveyed anglers fished occasionally (less than 30 times per year) and for leisure more than for catches. They fished most often in the morning (24%) and especially in summer (49%).<\/p>\n\n\n\n<p>The majority of surveyed anglers fished from shore only (74%), as few owned or rented a boat. Nearly half of the surveyed anglers cast from dikes (49%), although surfcasting from the beach also was common (44%). They chose their fishing spot principally based on tranquility or accessibility.<\/p>\n\n\n\n<p>Most anglers (57%) were locals, and in this fishery, most anglers (77%) ended the day emptyhanded. Only 12% caught one target species or more. Most anglers (92%) also practiced catchand-release.<\/p>\n\n\n\n<p>The average expenditure was 100 to 500 euros (approximately $120 to $600) to harvest 0 to 10 kilograms (22 lbs.) of fish per year.<\/p>\n\n\n\n<p>A large majority of surveyed anglers (74%) perceived a decline in the numbers of fishes, which they linked to commercial fishing (51%) and water pollution (25%). In addition, 60% of fishermen admitted that they did not know which species were protected inside the park or the minimum legal catch sizes for the main species they targeted.<\/p>\n\n\n\n<p><strong>So what?<\/strong><\/p>\n\n\n\n<p>The total Catch Per Unit of Effort didn\u2019t differ overall among types of anglers across these groups: \u201cVacationers,\u201d \u201cOccasional Local Fishermen,\u201d \u201cExperienced Local Fishermen,\u201d and \u201cLocal Lure Fishermen.\u201d<\/p>\n\n\n\n<p>When and where anglers fished, as well as how they responded to management measures, did differ across groups.<\/p>\n\n\n\n<p>In addition, the researchers only noted differences by group in Catch Per Unit of Effort for four species.<\/p>\n\n\n\n<p>Findings seem to support continued use of Catch Per Unit of Effort in onshore marine recreational fishing as a relative indicator for stock status, regardless of the kind of anglers in the area.<\/p>\n\n\n\n<p><em>Summary compiled by Sara Mirabilio<\/em><\/p>\n<\/div><a class=\"collapsible-more__interaction-cta collapsed\" href=\"#collapsible-more-2\" id=\"collapsible-more-heading-2\" data-toggle=\"collapse\" data-target=\"#collapsible-more-2\" aria-controls=\"collapsible-more-2\"><span class=\"collapsible-more__expansion-indicator\"><span class=\"ncst-plus-minus-toggle\"><\/span><\/span><span class=\"collapsible-more__text\">Expand to read more<\/span><span class=\"collapsible-more__text-collapse\">Collapse<\/span><\/a><\/div>\n<\/div><\/div><\/aside>\n\n\n\n<p><b><span style=\"color: #0000ff\"><a style=\"color: #0000ff\" href=\"http:\/\/www.hooklinescience.com\">read the full studies and more at <em>HookLineScience.com<\/em><\/a><\/span>&nbsp;<\/b><\/p>\n\n\n\n<p>Lead photo credit: <em>NC&#160;State University Photos<\/em><\/p>\n\n\n\n<div class=\"wp-block-ncst-related-stories\"><h2 class=\"related-stories__label\">Related<\/h2><div class=\"ncst-component__related-stories-container\">\n<a href=\"https:\/\/ncseagrant.ncsu.edu\/coastwatch\/magazine\/summer-2021\/\" class=\"wp-block-ncst-bold-link ncst-component__bold-link text-link\" data-ua-cat=\"Bold Link Block\" data-ua-action=\"Bold Link Click\" data-ua-label=\"https:\/\/ncseagrant.ncsu.edu\/coastwatch\/magazine\/summer-2021\/\"><span class=\"text\">Summer 2021 Issue<\/span><span class=\"arrow-indicator\"><svg class=\"wolficon\" role=\"img\" aria-hidden=\"true\"><use xlink:href=\"#wolficon-arrow-right-bold\" \/><\/svg><\/span><\/a>\n<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>The Anglers Who Are Best at What They Do \u2014 And More<\/p>\n","protected":false},"author":63,"featured_media":15199,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"views\/single-immersive.blade.php","format":"standard","meta":{"_acf_changed":false,"ncst_custom_author":"Scott Baker and Sara Mirabilio","ncst_show_custom_author":true,"ncst_dynamicHeaderBlockName":"ncst\/default-immersive-post-header","ncst_dynamicHeaderData":"{\"backgroundColor\":\"custombg_one\",\"displayCategoryID\":638,\"showAuthor\":true,\"showDate\":true,\"showFeaturedVideo\":false,\"subtitle\":\"The Anglers Who Are Best at What They Do \u2014 And More\"}","ncst_content_audit_freq":"","ncst_content_audit_date":"","ncst_content_audit_display":false,"ncst_backToTopFlag":"","footnotes":""},"categories":[637,584,602,595,638,596],"tags":[],"_ncst_magazine_issue":[639],"displayCategory":{"term_id":638,"name":"Summer 2021","slug":"summer-2021","term_group":0,"term_taxonomy_id":639,"taxonomy":"category","description":"","parent":637,"count":10,"filter":"raw"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Hook, Line &amp; 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