{"id":82246,"date":"2025-01-17T09:43:10","date_gmt":"2025-01-17T08:43:10","guid":{"rendered":"https:\/\/aktuelles.uni-frankfurt.de\/?p=82246"},"modified":"2025-01-17T09:43:11","modified_gmt":"2025-01-17T08:43:11","slug":"sea-more-species-genetic-differences-discovered-in-blue-whale-populations","status":"publish","type":"post","link":"https:\/\/aktuelles.uni-frankfurt.de\/en\/english\/sea-more-species-genetic-differences-discovered-in-blue-whale-populations\/","title":{"rendered":"Sea More Species? Genetic Differences Discovered in Blue Whale Populations"},"content":{"rendered":"<p><strong>Contrary to previous opinions, blue whales from the North Pacific and North Atlantic may form separate subspecies. A research team from the Senckenberg Biodiversity and Climate Research Center (SBiK-F), the former LOEWE Center for Translational Biodiversity Genomics (TBG) and Goethe University Frankfurt has gained these genetic insights into the evolution of the largest animal on earth, the blue whale (Balaenoptera musculus). According to the Frankfurt researchers, conservation measures should be specifically adapted to individual populations. Their study has now been published in the journal \u201cMolecular Ecology\u201d.<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image alignleft size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"500\" height=\"346\" src=\"https:\/\/aktuelles.uni-frankfurt.de\/wp-content\/uploads\/2025\/01\/pm-senckenberg_Blauwal_c_Adam_Ernster-500x346.jpg\" alt=\"\" class=\"wp-image-82244\" srcset=\"https:\/\/aktuelles.uni-frankfurt.de\/wp-content\/uploads\/2025\/01\/pm-senckenberg_Blauwal_c_Adam_Ernster-500x346.jpg 500w, https:\/\/aktuelles.uni-frankfurt.de\/wp-content\/uploads\/2025\/01\/pm-senckenberg_Blauwal_c_Adam_Ernster-300x208.jpg 300w, https:\/\/aktuelles.uni-frankfurt.de\/wp-content\/uploads\/2025\/01\/pm-senckenberg_Blauwal_c_Adam_Ernster-18x12.jpg 18w, https:\/\/aktuelles.uni-frankfurt.de\/wp-content\/uploads\/2025\/01\/pm-senckenberg_Blauwal_c_Adam_Ernster.jpg 650w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/><figcaption class=\"wp-element-caption\">The researchers from Frankfurt suspect that blue whales from the North Pacific and North Atlantic belong to different subspecies. The photo shows the new subspecies <em>Balaenoptera musculus sulfureus<\/em>, taken in the Santa Barbara Channel. Photo: Adam Ernster<\/figcaption><\/figure>\n\n\n\n<p>Blue whales (<em>Balaenoptera musculus<\/em>) can reach a length of up to 30 meters and weigh over 180 tons, making them the largest known whale species to ever have existed on Earth. These majestic marine mammals can be found in all of the world\u2019s oceans but prefer cold, nutrient-rich waters, which they visit in the summer months before migrating to warmer regions for the winter. In the 20th century, the blue whale was severely threatened by intensive whaling, and although commercial whaling is now largely banned, populations are only recovering slowly and the species is still included on the Red List.<\/p>\n\n\n\n<p>&nbsp;\u201cFrom a genetic point of view, such a dramatic decline in individuals means that the genetic diversity within the blue whale populations also decreases. Subsequently, this increases the effects of inbreeding, as harmful mutations are now more pronounced than before,\u201d explains Dr. Magnus Wolf, the study\u2019s lead author from the SBiK-F and Goethe University Frankfurt.<\/p>\n\n\n\n<p>Together with his colleagues Dr. Menno J. de Jong and Prof. Dr. Axel Janke, Wolf analyzed the genomes of 33 individual blue whales from all over the world. \u201cThe blue whale populations in the North Atlantic and North Pacific are currently regarded as a single subspecies, although they are separated by continental land masses and their vocalizations can be clearly distinguished acoustically. However, our results suggest that these whales have embarked on separate evolutionary paths since the last ice age,\u201d says Wolf, and he continues, \u201cThe analysis of the genomes reveals significant genetic differences between the two populations. We therefore propose a new subspecies name for the North Pacific population: <em>Balaenoptera musculus sulfureus<\/em>.\u201d Blue whales used to be called \u201csulfur bottoms\u201d in some regions due to the yellowish layer of algae on their underside, which is reminiscent of the pale yellow color of the chemical element sulfur. The new name honors this historical nickname, says the study.<\/p>\n\n\n\n<p>The research further examines the overall genetic health of blue whales \u2013 giving cause for optimism as well as caution. \u201cAlthough we found common signs of inbreeding and a general reduction in genetic diversity, the blue whales we examined have retained a high genetic variance, which is good news for the survival of these behemoths,\u201d explains senior author Janke.<\/p>\n\n\n\n<p>The results underscore the importance of genomics research in nature conservation and highlight the need for international cooperation. \u201cOur work can serve as a \u2018blueprint\u2019 for conservation genomics. It demonstrates how the status of difficult-to-observe species such as the blue whale can be successfully investigated using genomic analyses. These techniques allow us to tailor conservation measures to specific populations and respond before population decline and inbreeding become a problem,\u201d adds Wolf in conclusion.<\/p>\n\n\n\n<p class=\"has-background\" style=\"background-color:#eeeeee\"><strong>Publication:<\/strong> Magnus Wolf, Menno J. de Jong, Axel Janke: <strong>Ocean-Wide Conservation Genomics of Blue Whales Suggest New Northern Hemisphere Subspecies<\/strong>. Mol Ecol, 34: e17619 (2025). <a href=\"https:\/\/doi.org\/10.1111\/mec.17619\">https:\/\/doi.org\/10.1111\/mec.17619<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/www.senckenberg.de\/en\/pressemeldungen\/sea-more-species-genetic-differences-discovered-in-blue-whale-populations\/\"><em>Source<\/em><\/a><\/p>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>Contrary to previous opinions, blue whales from the North Pacific and North Atlantic may form separate subspecies. A research team from the Senckenberg Biodiversity and Climate Research Center (SBiK-F), the [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":82244,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_eb_attr":"","_price":"","_stock":"","_tribe_ticket_header":"","_tribe_default_ticket_provider":"","_ticket_start_date":"","_ticket_end_date":"","_tribe_ticket_show_description":"","_tribe_ticket_show_not_going":false,"_tribe_ticket_use_global_stock":"","_tribe_ticket_global_stock_level":"","_global_stock_mode":"","_global_stock_cap":"","_tribe_rsvp_for_event":"","_tribe_ticket_going_count":"","_tribe_ticket_not_going_count":"","_tribe_tickets_list":"[]","_tribe_ticket_has_attendee_info_fields":false,"footnotes":""},"categories":[126,254],"tags":[246],"post_folder":[],"class_list":["post-82246","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-english","category-research","tag-biological-sciences"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Sea More Species? 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