{"id":4095,"date":"2023-01-17T21:25:41","date_gmt":"2023-01-17T18:25:41","guid":{"rendered":"https:\/\/www.coa.sua.ac.tz\/animal\/?p=4095"},"modified":"2023-01-17T22:03:22","modified_gmt":"2023-01-17T19:03:22","slug":"evidence-of-extensive-genetic-connectivity-and-recent-demographic-expansion-of-the-queen-mackerel-fish-in-tanzanian-coastal-waters","status":"publish","type":"post","link":"https:\/\/www.coa.sua.ac.tz\/animal\/research-news\/evidence-of-extensive-genetic-connectivity-and-recent-demographic-expansion-of-the-queen-mackerel-fish-in-tanzanian-coastal-waters","title":{"rendered":"Evidence of extensive genetic connectivity and recent demographic expansion of the queen mackerel fish in Tanzanian coastal waters"},"content":{"rendered":"<p><span style=\"font-size: 14pt\">Dr. <a href=\"https:\/\/www.coa.sua.ac.tz\/animal\/dr-cyrus-rumisha\" target=\"_blank\" rel=\"noopener\">Cyrus Rumisha<\/a> et al (2023)<\/span><\/p>\n<p><span style=\"font-size: 14pt\">From <a href=\"https:\/\/www.coa.sua.ac.tz\/animal\/\" target=\"_blank\" rel=\"noopener\">Department of Animal, Aquaculture and Range Sciences<\/a><\/span><\/p>\n<p><span style=\"font-size: 14pt\">The queen mackerel<em> Scomberomorus plurilineatus <\/em>has long been an important source of dietary animal protein, household <\/span><span style=\"font-size: 14pt\">income, and employment to coastal communities in the Western Indian Ocean (WIO) region. Yet, since their market value <\/span><span style=\"font-size: 14pt\">has increased in recent years, they are increasingly exploited and their populations are declining. Hence, WIO countries enacted <\/span><span style=\"font-size: 14pt\">measures to curb destructive fishing and are taking initiatives to expand marine protected areas (MPAs). Yet, there is no data on <\/span><span style=\"font-size: 14pt\">the genetic stock structure of the fishery in the entire WIO, which preclude these initiatives. This study analysed fragments (647 <\/span><span style=\"font-size: 14pt\">base pairs) of the cytochrome oxidase subunit I (COI) gene from 118 queen mackerels collected from four main fishing grounds <\/span><span style=\"font-size: 14pt\">in Tanzania to reveal the extent of genetic connectivity and demographic history. The sequences showed signals of recent <\/span><span style=\"font-size: 14pt\">demographic expansion which is typical for most WIO fauna. Analysis of molecular variance showed insignificant indices of <\/span><span style=\"font-size: 14pt\">genetic differentiation between sites (FST = 0.00366, p &gt; 0.005; \u03a6ST = \u22120.00450, p &gt; 0.05), indicating extensive genetic <\/span><span style=\"font-size: 14pt\">connectivity and suggesting that the fishery is a single stock. This implies that although some sites showed very low haplotype <\/span><span style=\"font-size: 14pt\">diversity, nucleotide diversity, and effective population size (\u0398), the fishery is capable to revitalize itself if measures are taken to <\/span><span style=\"font-size: 14pt\">curb unsustainable fishing. Since the fishery showed extensive genetic connectivity, this study recommends a single management <\/span><span style=\"font-size: 14pt\">unit for the queen mackerel stock in Tanzania.<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"font-size: 14pt\">For more details:\u00a0<a href=\"https:\/\/link.springer.com\/article\/10.1007\/s12526-022-01315-y\" target=\"_blank\" rel=\"noopener\"><strong>Click here<\/strong><\/a><\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"font-size: 14pt\">Rumisha C, Bugota, V.J. and Mtonga, B.C. (2023). Evidence of extensive genetic connectivity and recent demographic expansion of the queen mackerel <em>Scomberomorus plurilineatus<\/em> in Tanzanian coastal waters.<em> Marine Biodiversity<\/em> <a href=\"https:\/\/link.springer.com\/article\/10.1007\/s12526-022-01315-y\" target=\"_blank\" rel=\"noopener\">https:\/\/doi.org\/10.1007\/s12526-022-01315-y<\/a><\/span><\/p>\n<p><strong>Share this page<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Dr. Cyrus Rumisha et al (2023) From Department of Animal, Aquaculture and Range Sciences The queen mackerel Scomberomorus plurilineatus has long been an important source of dietary animal protein, household income, and employment to coastal communities in the Western Indian Ocean (WIO) region. Yet, since their market value has increased in recent years, they are [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":2855,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-4095","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-research-news"],"_links":{"self":[{"href":"https:\/\/www.coa.sua.ac.tz\/animal\/wp-json\/wp\/v2\/posts\/4095","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.coa.sua.ac.tz\/animal\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.coa.sua.ac.tz\/animal\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.coa.sua.ac.tz\/animal\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.coa.sua.ac.tz\/animal\/wp-json\/wp\/v2\/comments?post=4095"}],"version-history":[{"count":5,"href":"https:\/\/www.coa.sua.ac.tz\/animal\/wp-json\/wp\/v2\/posts\/4095\/revisions"}],"predecessor-version":[{"id":4104,"href":"https:\/\/www.coa.sua.ac.tz\/animal\/wp-json\/wp\/v2\/posts\/4095\/revisions\/4104"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.coa.sua.ac.tz\/animal\/wp-json\/wp\/v2\/media\/2855"}],"wp:attachment":[{"href":"https:\/\/www.coa.sua.ac.tz\/animal\/wp-json\/wp\/v2\/media?parent=4095"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.coa.sua.ac.tz\/animal\/wp-json\/wp\/v2\/categories?post=4095"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.coa.sua.ac.tz\/animal\/wp-json\/wp\/v2\/tags?post=4095"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}