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by Christian Mogensen
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Hvorfor efterligner nogle edderkopper myrer? Og hvordan snyder giftige frøer og sommerfugle rovdyr kun ved at bruge farver?Jo, I Amazonas handler overlevelse ikke kun om camouflage – men også om bedrag, og i denne episode dykker vi endnu gang ned i mimicry: Hvordan dyr snyder hinanden i amazonas!I episoden kan du høre om:• Edderkopper der ligner myrer for at undgå rovdyr• Edderkopper der efterligner myrer for at snyde myrer• Edderkopper der bygger kæmpe falske monsteredderkopper i deres spind• Giftige pilegiftfrøer og sommerfugle med stærke advarselsfarver• Sommerfugle der efterligner giftige arter uden selv at være giftigeGod fornøjelse!Billeder afZygy, CC0, via Wikimedia CommonsVis M, CC BY-SA 4.0 <https://creativecommons.org/licenses/by-sa/4.0>, via Wikimedia CommonsDidier Descouens, CC BY-SA 4.0 <https://creativecommons.org/licenses/by-sa/4.0>, via Wikimedia CommonsVienskabelige kilderKeith R. Willmott, Julia C. Robinson Willmott, Marianne Elias, Chris D. Jiggins; Maintaining mimicry diversity: optimal warning colour patterns differ among microhabitats in Amazonian clearwing butterflies. Proc Biol Sci 1 May 2017; 284 (1855): 20170744. https://doi.org/10.1098/rspb.2017.0744Cushing, Paula. (2012). Spider-Ant Associations: An Updated Review of Myrmecomorphy, Myrmecophily, and Myrmecophagy in Spiders. Psyche. 2012. 10.1155/2012/151989. Bernarde, P. S., Pucca, M. B., Mota-da-Silva, A., da Fonseca, W. L., de Almeida, M. R. N., de Oliveira, I. S., Cerni, F. A., Gobbi Grazziotin, F., Sartim, M. A., Sachett, J., Wen, F. H., Moura-da-Silva, A. M., & Monteiro, W. M. (2021). Bothrops bilineatus: An arboreal pitviper in the Amazon and Atlantic Forest. Frontiers in Immunology, 12, Article 778302. Andre kilder:https://doi.org/10.3389/fimmu.2021.778302https://www.nhm.ac.uk/discover/henry-walter-bates-amazon-butterflies.htmlhttps://worldrainforests.com/0306.htmhttps://www.bristol.ac.uk/cabot/news/2025/butterflies.htmlhttps://atmos.earth/ecological-wisdom/aposematism-and-the-beauty-of-awareness/https://www.worldwildlife.org/species/poison-dart-frog/https://www.snexplores.org/article/poison-dart-frog-transport-toxins-skinhttps://www.rainforest-alliance.org/species/poison-dart-frog/https://www.pbs.org/wnet/nature/blog/inside-nature-featured-creature-glass-wing-butterfly/https://andeangreattreks.com/blog/insects-of-the-amazon-rainforest/https://www.heliconius.org/biology/mimicry/https://www.rainforestexpeditions.com/deception-in-the-jungle-the-ant-mimicking-spider-aphantochilus-rogersi/https://www.rainforestexpeditions.com/if-it-looks-like-an-ant-and-smells-like-an-ant-batesian-mimicry-in-the-amazon-jungle/https://www.livescience.com/animals/spiders/tiny-spiders-that-build-giant-puppet-decoys-from-disembodied-prey-discovered-in-peru-and-philippineshttps://en.wikipedia.org/wiki/Batesian_mimicry
I denne del af mini konceptet yLtternes Dyr, kan du høre om den mærkelige og sjældne savhaj. Tusind Tak til Antonski for forlsaget!Jeg beklager at der ikke er mange billeder i denne episode,men det skyldes at savhajen er sjælden og det derfor er svært at finde billeder, som man må bruge. Tak for forståelsen:)Kilder : https://ocean.si.edu/ocean-life/sharks-rays/sawsharkhttps://www.afma.gov.au/species/sawsharks#referenced-section-2https://www.sharks.org/blog/2020/6/15/sawfish-or-sawsharkhow-are-they-differenthttps://saveourseas.com/update/the-cutting-edge-of-sawshark-research/https://australian.museum/learn/animals/fishes/common-sawshark-pristiophorus-cirratus/https://www.theguardian.com/environment/2022/dec/07/discovered-in-the-deep-the-extraordinary-sawshark-with-a-weapon-like-snouthttps://oceanographicmagazine.com/news/new-species-six-gilled-sawshark/
Dette afsnit er noget helt særligt. I samarbejde med Red Orangutangen og Aalborg Zoo har jeg fået lov til at dykke ned i orangutangens verden.Jeg har talt med to af Red Orangutangens dygtige medarbejdere om deres arbejde med at redde en af verdens mest truede aber, nemlig orangutangen. For hvad driver mennesker til at vie deres liv til at bevare orangutanger? Hvordan lærer mennesker unge forældreløse orangutanger at klare sig selv i “orangutangskole”? – og hvad kræver det egentlig at redde en art fra udryddelse? Det er nogle af de emner, du kan høre om i dette afsnit! + Du får selvfølgelig også masser af facts om orangutanger: deres liv i trætoppene, deres adfærd – og de alvorlige trusler, de kæmper imod.God fornøjelse 🎧Tusind tak til Daniel, Jens og resten af holdet fra Red Orangutangen for at i ville medvirke!Vil du vide mere om Red Orangutangen Klik her
Hvordan bliver et dyr næsten usynligt?Midt i Amazonas sidder en lille frø, der kan gøre sig næsten gennemsigtig og gemme sit blod for at forsvinde fra rovdyr.Og den er kun begyndelsen.I denne episode dykker vi ned i Amazonas’ vilde verden af camouflage – hvor dyr ikke bare gemmer sig, men narrer selv de skarpeste rovdyr ved at ligne blade, bark og døde grene.I episoden kan du høre om:• Glasfrøen, der kan blive gennemsigtig• Amazonas’ “falske kamæleoner”• Blad- og pindelignende insekter, der snyder selv forskere• Knælere der ligner bark – og både jager og gemmer sig• Pacman-frøer med kæmpe bid og ekstrem camouflage• Fuglen potoo, der ligner en gren til perfektionBilleder af:Graham Wise from Brisbane, Australia, CC BY 2.0 , via Wikimedia CommonsGeoff Gallice from Gainesville, FL, USA, CC BY 2.0 , via Wikimedia CommonsPavel Kirillov from St.Petersburg, Russia, CC BY-SA 2.0 , via Wikimedia CommonsPavel Kirillov, CC BY-SA 4.0 , via Wikimedia CommonsAllissondias, CC BY-SA 4.0 , via Wikimedia CommonsSvenson G, CC BY 4.0 , via Wikimedia CommonsBernard DUPONT from FRANCE, CC BY-SA 2.0 , via Wikimedia CommonsJiri Hodecek, CC BY-SA 4.0 , via Wikimedia CommonsBernard DUPONT from FRANCE, CC BY-SA 2.0 , via Wikimedia CommonsKilderVidenskabelige artiklerMajor, T., Hesten, A. C. M., Stipala, J., Cant, M. A., Stevens, M., & Troscianko, J. (2025). Flap-necked chameleons change colour to match their background. Biology Letters, 21(8), 20250134. https://doi.org/10.1098/rsbl.2025.0134Madeira-Ott, T., Thyssen, P. J., & Costa, J. (2020). Phasmatodea in Brazil: Status, new record, and molecular tools for species identification. Neotropical Entomology, 49, 916–922. https://doi.org/10.1007/s13744-020-00798-3Ghirotto, V. M. (2021). Morphology, taxonomy, and biology of Canuleius similis. Zoologischer Anzeiger, 292, 30–57. https://doi.org/10.1016/j.jcz.2021.02.009Castner, J. L., & Nickle, D. A. (1995). Color polymorphism in leaf-mimicking katydids. Journal of Orthoptera Research, 4, 99–103. https://doi.org/10.2307/3503464Braun, H. (2015). Biology and taxonomy of Typophyllum species. Zootaxa, 4012(1), 1–32. https://doi.org/10.11646/zootaxa.4012.1.1de Alcantara Viana, J. V., Campos Duarte, R., Vieira, C., et al. (2023). Crypsis and disruptive coloration in Amazonian mantises. Scientific Reports, 13, 19985. https://doi.org/10.1038/s41598-023-46204-xCestari, C., Gonçalves, C., & Sazima, I. (2018). Perch flexibility in the common potoo. The Wilson Journal of Ornithology, 130, 191–199. https://doi.org/10.1676/16-175.1Andrehttps://worldrainforests.com/0306.htmhttps://www.rainforest-alliance.org/species/northern-glass-frog/https://www.ifaw.org/animals/glass-frogshttps://www.nibib.nih.gov/news-events/newsroom/let%E2%80%99s-clear-things-how-do-glassfrogs-achieve-transparency?utm_source=chatgpt.comhttps://en.wikipedia.org/wiki/Chameleonhttps://www.reptilesofecuador.com/polychrus_marmoratus.html<a href="https://web.archive.org/web/20160303230855/http:/
Tak til Theo for forslaget!Har du et yndlingsdyr, som du gerne vil høre nogle fun facts om? Så skriv en kommentar eller en besked på Instagram!Kilderhttps://lex.dk/isfuglehttps://dofbasen.dk/danmarksfugle/art/08310https://novana.au.dk/fugle/fugle-2020-2021/ynglefugle/ynglefuglearter/isfugl
Tak til Bæster for forslaget! Har du et dyr, som du gerne vil høre om? Så skriv det i kommentaren eller på Instagram!Kilderhttps://www.nwf.org/Educational-Resources/Wildlife-Guide/Fish/Flying-Fishhttps://www.deepseaworld.com/blog/can-fish-fly-5-interesting-facts-about-the-flying-fish/
Tak til Sylvie for forslaget! Har du et dyr du gerne vil høre om? så skriv det i kommentarene eller på instagram!Kilderhttps://www.natgeokids.com/uk/discover/animals/general-animals/cheetah-facts/https://www.pbs.org/articles/fun-facts-about-cheetahs-big-cats-247https://normandie-univ.hal.science/hal-02139428v1https://cheetah.org/da/learn/about-cheetahs/https://www.catsg.org/living-species-cheetah
Jaguaren har et så stærkt bid, at den som den eneste af de store katte dræber sit bytte ved at bide gennem kraniet. Selv skildpadders skjold og kaimaners pansrede skæl kan jaguaren bide igennem! Men jaguaren er blot ét af Amazonas mange ikoniske toprovdyr.I floderne lurer den sorte kaiman, og i sumpene ligger den grønne anakonda klar i baghold. Som toprovdyr er de med til at forme hele Amazonas’ økosystem.I denne episode tager vi dig med på en rejse fra vandet og op i landskabet, hvor du møder tre af Amazonas’ toprovdyr. Du får også indblik i, hvordan de er med til at holde verdens største regnskov i balance – og hvad der sker, når toprovdyr forsvinder fra et område.Så læn dig godt tilbage, og kom med på rejsen ind i toprovdyrenes verdenBilleder af Museum of Veterinary Anatomy FMVZ USP / Wagner Souza e Silva, CC BY-SA 4.0 <https://creativecommons.org/licenses/by-sa/4.0>, via Wikimedia CommonsRum from An Sgurr, Eigg by Jim Barton, CC BY-SA 2.0 <https://creativecommons.org/licenses/by-sa/2.0>, via Wikimedia CommonsKilderPatrick S. Champagne, Thomas B. Herman, Paul Rosolie, Dylan Singer, Dan Horton, Carter J. Payne, Lucy Dablin, David Colville, Julio Cardenas, Miryam Quevedo, Trevor Avery, Renata Leite Pitman, Does the Southern Green Anaconda, Eunectes murinus, seek areas of high prey concentration in southeastern Peru?,Food Webs, Volume 39, 2024,e00348,ISSN 2352-2496,https://doi.org/10.1016/j.fooweb.2024.e00348.Estes, J. A., Terborgh, J., Brashares, J. S., Power, M. E., Berger, J., Bond, W. J., Carpenter, S. R., Essington, T. E., Holt, R. D., Jackson, J. B. C., Marquis, R. J., Oksanen, L., Oksanen, T., Paine, R. T., Pikitch, E. K., Ripple, W. J., Sandin, S. A., Scheffer, M., Schoener, T. W., … Wardle, D. A. (2011). Trophic downgrading of planet Earth. Science, 333(6040), 301–306. https://doi.org/10.1126/science.1205106Terborgh, John & Lopez, Lawrence & Nunez, P.V. & Rao, Madhu & Shahabuddin, Ghazala & Orihuela, Gabriela & Riveros, Mailen & Ascanio, Rafael & Adler, Gregory & Lambert, Thomas & Balbas, Luis. (2001). Ecological Meltdown in Predator-Free Forest Fragments. Science (New York, N.Y.). 294. 1923-6. 10.1126/science.1064397. Horna, Viviana & Cintra, Renato & Vasquez, Pedro. (2001). FEEDING ECOLOGY OF BLACK CAIMAN MELANOSUCHUS NIGER IN A WESTERN AMAZONIAN FOREST:THE EFFECTS OF ONTOGENY AND SEASONALITY ON DIET COMPOSITION. Ecotropica. 7. 1-11.Caut, S., Francois, V., Bacques, M., Guiral, D., Lemaire, J., Lepoint, G., Marquis, O., & Sturaro, N. (2019). The dark side of the black caiman: Shedding light on species dietary ecology and movement in Agami Pond, French Guiana. PLOS ONE, 14(6), e0217239. https://doi.org/10.1371/journal.pone.0217239Angarita-Sierra, T., & López-Hurtado, C. A. (2020). Exploring the reproductive ecology of the tropical semifossorial snake Ninia atrata. Zoological Research, 41(2), 157. https://doi.org/10.24272/j.issn.2095-8137.2020.015https://www.livescience.com/animals/snakes/never-before-seen-footage-captures-moment-scientists-find-new-giant-anaconda-species-in-amazonhttps://www.livescience.com/animals/snakes/how-we-found-the-northern-green-anaconda-a-new-species-of-the-heaviest-snake-on-earthhttps://www.nationalgeographic.com/animals/reptiles/facts/green-anacondahttps://www.catsg.org/living-species-jaguarhttps://www.wwf.org.uk/learn/wildlife/jaguarshttps://bigcatrescue.org/conservation-news/jaguar-factshttps://www.iflscience.com/black-caiman-the-amazons-apex-predator-that-hunts-everything-even-humans-74252https://www.iucncsg.org/365_docs/attachments/protarea/06_M-24b37cab.pdf<a
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Dyr i Detaljen er en sæsonbaseret video-podcast, der gør biologi levende gennem dyr, dyregrupper og økosystemer. Hver sæson dykker vi ned i, hvordan og hvorfor dyr kan det, de kan – fra evolution og selektion til sanser, overlevelse og vilde biologiske tilpasninger.Hver sæson har et tydeligt tema og udfoldes over flere afsnit, hvor komplekse sammenhænge forklares roligt, nysgerrigt og uden skoleagtig undervisning. Nye afsnit hver 2. søndag.Bag podcasten er jeg, Christian Mogensen, biologistuderende, selvstændig naturformidler og guide i Aalborg Zoo.
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