{"id":3419,"date":"2024-05-26T15:16:03","date_gmt":"2024-05-26T05:16:03","guid":{"rendered":"https:\/\/theveterinarian.com.au\/?p=3419"},"modified":"2024-05-10T15:18:42","modified_gmt":"2024-05-10T05:18:42","slug":"heat-stress-from-ocean-warming-harms-octopus-vision","status":"publish","type":"post","link":"https:\/\/theveterinarian.com.au\/?p=3419","title":{"rendered":"<strong>Heat stress from ocean warming harms octopus vision<\/strong>"},"content":{"rendered":"\n<p>While climate change has led to an increase in the abundance of octopuses, heat stress from projected ocean warming could impair their vision and impact the survivability of the species.<\/p>\n\n\n\n<p>\u201cWe found several proteins important for vision that were affected by thermal stress,\u201d Qiaz Hua, a recent PhD graduate from the University of Adelaide\u2019s School of Biological Sciences, said.<\/p>\n\n\n\n<p>\u201cOne of them is a structural protein found in high abundance in animal eye lenses to preserve lens transparency and optical clarity, and another is responsible for the regeneration of visual pigments in the photoreceptors of the eyes.<\/p>\n\n\n\n<p>\u201cThe levels of both of these proteins were significantly reduced under projected ocean warming conditions, which suggests that octopus vision is likely to be impaired under thermal stress.\u201d<\/p>\n\n\n\n<p>Octopuses are highly visual animals, with 70 per cent of the octopus brain dedicated to vision \u2013 which is 20 per cent more than in humans.<\/p>\n\n\n\n<p>\u201cThe primary functions of vision include but are not limited to visual acuity, discrimination of brightness, depth perception, motion detection and polarisation, and it is crucial for detecting predator and prey as well as for communication,\u201d Hua said.<\/p>\n\n\n\n<p>\u201cHaving impaired vision will affect an octopus\u2019s chances of survival in the wild through increased predator risk as well as lower foraging success.\u201d<\/p>\n\n\n\n<p>To make this finding, the research team, including academics from the University of South Australia, University of California Davis, and the South Australian Research and Development Institute\u2019s aquatic sciences division, exposed&nbsp;<em>Octopus Berrima&nbsp;<\/em>embryos to different temperature treatments, a control 19\u00b0C exposure, 22\u00b0C to model current summer temperatures, and 25\u00b0C to model projected summer temperatures.<\/p>\n\n\n\n<p>\u201cThe future-projected temperature was based on the Intergovernmental Panel on Climate Change\u2019s projected increase of about 3\u00b0C of warming by 2100,\u201d Hua said.<\/p>\n\n\n\n<p>In addition to impaired vision, Hua found increased ocean water temperatures would have a negative effect on octopus broods.<\/p>\n\n\n\n<p>\u201cWe found a high mortality rate under future warming conditions. Out of three replicate octopus broods, none of the eggs hatched for two of them and less than half of the eggs hatched for the remaining brood,\u201d Hua said.<\/p>\n\n\n\n<p>\u201cIn the broods where none of the eggs hatched, the mothers died naturally while the eggs were still in early development stages.<\/p>\n\n\n\n<p>\u201cBecause maternal care of embryos occurs in octopuses, global warming could have a simultaneous impact on multiple generations, with the low survival rate of the embryos caused by the direct effect of thermal stress as well as the indirect effect of thermal stress on the mothers.<\/p>\n\n\n\n<p>\u201cOur study shows that even for a highly adaptable taxon like octopuses, they may not be able to survive future ocean changes.\u201d<\/p>\n\n\n\n<p>Other effects of higher temperatures which have been observed in octopuses include a higher metabolic rate, reduced size at maturity, and even a range shift in the distribution of some species.<\/p>\n\n\n\n<p>\u201cWe hope that future research would examine a combination of environmental stressors including ocean acidification, warming, and deoxygenation,\u201d Hua said.<\/p>\n\n\n\n<p>\u201cIt would also be useful to do a transgenerational experiment to see if sensitivity or tolerance to the environmental stressors is passed down from one generation to the next, which help us understand the impacts on the continuation of the species.\u201d<\/p>\n","protected":false},"excerpt":{"rendered":"<p>While climate change has led to an increase in the abundance of octopuses, heat stress from projected ocean warming could impair their vision and impact the survivability of the species. \u201cWe found several proteins important for vision that were affected by thermal stress,\u201d Qiaz Hua, a recent PhD graduate from the University of Adelaide\u2019s School [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3420,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[3167,2870,3168,3166,3161,3169,3163,3164,3159,3160,3165,3162,3170,3157,3158],"class_list":["post-3419","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","tag-broodsurvival","tag-climatechangeimpact","tag-distributionshift","tag-environmentalstressors","tag-foragingsuccess","tag-maternalcare","tag-metabolicrate","tag-oceanwarming","tag-octopussurvivability","tag-predatorpreyinteraction","tag-sizereduction","tag-temperaturestress","tag-transgenerationaleffects","tag-visionimpairment","tag-visualacuity"],"rise-blocks_total_comments":0,"rise-blocks_categories":[{"term_id":5,"name":"News","slug":"news","term_group":0,"term_taxonomy_id":5,"taxonomy":"category","description":"","parent":0,"count":402,"filter":"raw","cat_ID":5,"category_count":402,"category_description":"","cat_name":"News","category_nicename":"news","category_parent":0}],"rise-blocks_excerpt":"While climate change has led to an increase in the abundance of octopuses, heat stress from projected ocean warming could impair their vision and impact the survivability of the species. \u201cWe found several proteins important for vision that were affected by thermal stress,\u201d Qiaz Hua, a recent PhD graduate from the University of Adelaide\u2019s School of Biological Sciences, said. \u201cOne..","blog_post_layout_featured_media_urls":{"thumbnail":["https:\/\/theveterinarian.com.au\/wp-content\/uploads\/2024\/05\/Octopus-berrima-credit-Qiaz-Hua-150x150.jpg",150,150,true],"full":["https:\/\/theveterinarian.com.au\/wp-content\/uploads\/2024\/05\/Octopus-berrima-credit-Qiaz-Hua.jpg",1200,900,false]},"categories_names":{"5":{"name":"News","link":"https:\/\/theveterinarian.com.au\/?cat=5"}},"tags_names":{"3167":{"name":"#BroodSurvival","link":"https:\/\/theveterinarian.com.au\/?tag=broodsurvival"},"2870":{"name":"#ClimateChangeImpact","link":"https:\/\/theveterinarian.com.au\/?tag=climatechangeimpact"},"3168":{"name":"#DistributionShift","link":"https:\/\/theveterinarian.com.au\/?tag=distributionshift"},"3166":{"name":"#EnvironmentalStressors","link":"https:\/\/theveterinarian.com.au\/?tag=environmentalstressors"},"3161":{"name":"#ForagingSuccess","link":"https:\/\/theveterinarian.com.au\/?tag=foragingsuccess"},"3169":{"name":"#MaternalCare","link":"https:\/\/theveterinarian.com.au\/?tag=maternalcare"},"3163":{"name":"#MetabolicRate","link":"https:\/\/theveterinarian.com.au\/?tag=metabolicrate"},"3164":{"name":"#OceanWarming","link":"https:\/\/theveterinarian.com.au\/?tag=oceanwarming"},"3159":{"name":"#OctopusSurvivability","link":"https:\/\/theveterinarian.com.au\/?tag=octopussurvivability"},"3160":{"name":"#PredatorPreyInteraction","link":"https:\/\/theveterinarian.com.au\/?tag=predatorpreyinteraction"},"3165":{"name":"#SizeReduction","link":"https:\/\/theveterinarian.com.au\/?tag=sizereduction"},"3162":{"name":"#TemperatureStress","link":"https:\/\/theveterinarian.com.au\/?tag=temperaturestress"},"3170":{"name":"#TransgenerationalEffects","link":"https:\/\/theveterinarian.com.au\/?tag=transgenerationaleffects"},"3157":{"name":"#VisionImpairment","link":"https:\/\/theveterinarian.com.au\/?tag=visionimpairment"},"3158":{"name":"#VisualAcuity","link":"https:\/\/theveterinarian.com.au\/?tag=visualacuity"}},"comments_number":"0","wpmagazine_modules_lite_featured_media_urls":{"thumbnail":["https:\/\/theveterinarian.com.au\/wp-content\/uploads\/2024\/05\/Octopus-berrima-credit-Qiaz-Hua-150x150.jpg",150,150,true],"cvmm-medium":["https:\/\/theveterinarian.com.au\/wp-content\/uploads\/2024\/05\/Octopus-berrima-credit-Qiaz-Hua.jpg",300,225,false],"cvmm-medium-plus":["https:\/\/theveterinarian.com.au\/wp-content\/uploads\/2024\/05\/Octopus-berrima-credit-Qiaz-Hua.jpg",276,207,false],"cvmm-portrait":["https:\/\/theveterinarian.com.au\/wp-content\/uploads\/2024\/05\/Octopus-berrima-credit-Qiaz-Hua.jpg",400,300,false],"cvmm-medium-square":["https:\/\/theveterinarian.com.au\/wp-content\/uploads\/2024\/05\/Octopus-berrima-credit-Qiaz-Hua.jpg",600,450,false],"cvmm-large":["https:\/\/theveterinarian.com.au\/wp-content\/uploads\/2024\/05\/Octopus-berrima-credit-Qiaz-Hua.jpg",1024,768,false],"cvmm-small":["https:\/\/theveterinarian.com.au\/wp-content\/uploads\/2024\/05\/Octopus-berrima-credit-Qiaz-Hua.jpg",127,95,false],"full":["https:\/\/theveterinarian.com.au\/wp-content\/uploads\/2024\/05\/Octopus-berrima-credit-Qiaz-Hua.jpg",1200,900,false]},"_links":{"self":[{"href":"https:\/\/theveterinarian.com.au\/index.php?rest_route=\/wp\/v2\/posts\/3419","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/theveterinarian.com.au\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/theveterinarian.com.au\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/theveterinarian.com.au\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/theveterinarian.com.au\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3419"}],"version-history":[{"count":1,"href":"https:\/\/theveterinarian.com.au\/index.php?rest_route=\/wp\/v2\/posts\/3419\/revisions"}],"predecessor-version":[{"id":3421,"href":"https:\/\/theveterinarian.com.au\/index.php?rest_route=\/wp\/v2\/posts\/3419\/revisions\/3421"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/theveterinarian.com.au\/index.php?rest_route=\/wp\/v2\/media\/3420"}],"wp:attachment":[{"href":"https:\/\/theveterinarian.com.au\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3419"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/theveterinarian.com.au\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3419"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/theveterinarian.com.au\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3419"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}