{"id":7010,"date":"2024-11-27T12:16:24","date_gmt":"2024-11-27T12:16:24","guid":{"rendered":"https:\/\/www2.marbio.sdu.dk\/?page_id=7010"},"modified":"2024-12-04T13:52:01","modified_gmt":"2024-12-04T13:52:01","slug":"sycon-sponges","status":"publish","type":"page","link":"https:\/\/www.marbio.sdu.dk\/?page_id=7010","title":{"rendered":"Filtration, respiration and contractile behaviour of the calcareous syconoid sponge Sycon ciliatum"},"content":{"rendered":"\n

Participants<\/strong>: Hans Ulrik Riisg\u00e5rd & Lars Kumala<\/p>\n\n\n\n

Abstract:<\/strong> Only little is known about motility in calcareous sponges, but they may share certain behavioral capabilities with the more complex demosponges. Yet, the mechanism underlying these behaviors, including the control of internal flow, remains poorly understood and warrants further investigation. All calcareous\u00a0sponges are marine and they are small. Very few physiological and bioenergetic studies have so far been carried out on calcareous sponges compared to a large and steadily increasing number of studies conducted on demosponges. The present project aims at filling in this gap using the calcareous sponge Sycon striatum<\/em> collected in Hirtshals harbor by the Nordsee Oceanarium. Laboratory studies conducted at the Marine Biological Research Centre (SDU) will explore fundamental feeding mechanisms, bioenergetics, growth and behavior in calcareous sponges. The research will provide insights into the evolution of the aquiferous system and thus the implications for filter-feeding in the earliest metazoans.<\/p>\n\n\n\n

Resum\u00e9<\/strong> (Danish): Svampedyr er verdens f\u00f8rste og simpleste dyr. De klarer sig godt, Men hvorfor er de ikke blevet udkonkurreret af mere moderne filtrerende dyr som f.eks. muslinger? Svampedyr er en af de tidligst udviklede og enkleste grupper af dyr, som udviklede sig for 550 mio. \u00e5r siden. De er flercellede og lever af at filtrere det omgivende vand for mikroskopiske planktonalger og fritlevende bakterier. De mangler egentlige muskler og nerver. Alligevel kan de tr\u00e6kke sig sammen og lukke for vandtransporten, hvis de bliver forstyrret eller overbelastet med partikler. De kan rense deres vandkanaler for u\u00f8nskede partikler, inden de \u00e5bner sig igen og filtrerer videre. Men det g\u00e5r langsomt, s\u00e5 n\u00f8dvendig med time-lapse video-optagelser for at studere deres adf\u00e6rd. Som de f\u00f8rste dyr, havde de ingen fjender, s\u00e5 de beh\u00f8vede ikke flytte sig eller skynde sig. Alligevel er der i dag over 10.000 nulevende arter fordelt p\u00e5 fire klasser, hvoraf den ene klasse er kalksvampene, som vi studerer i dette projekt. Det er meget lidt, vi ved om kalksvampene. Vi ved at s\u00e6rlige kraveceller (choanocytter) b\u00e5de filtrerer og pumper vandet gennem et indg\u00e5ende og udg\u00e5ende kanalsystem. Vandet suges ind gennem sm\u00e5 \u00e5bninger i dyrets overflade, mens det filtrerede vand forlader dyret som en jet gennem en st\u00f8rre \u00e5bning (osculum). I vores projekt med kalksvampe (Sycon ciliatum<\/em>), som bliver indsamlet i Hirtshals Havn af Nords\u00f8en Oceanarium, \u00f8nsker vi at m\u00e5le, hvor meget vand svampedyrene filtrerer og n\u00f8jere studere, hvordan pumpe-hastigheden kontrolleres ved lukning af udstr\u00f8mnings\u00e5bningen. Vi \u00f8nsker ogs\u00e5 at m\u00e5le svampedyrenes stofskifte (respiration) og v\u00e6kst under forskellige f\u00f8deforhold. Et godt sp\u00f8rgsm\u00e5l er, hvordan disse meget primitive svampedyr har v\u00e6ret i stand til at overleve til i dag og konkurrere med langt mere avancerede og langt senere udviklede filtrerende dyr som f.eks. muslinger?<\/p>\n\n\n\n

\n
\"\"<\/figure>\n<\/div>\n\n\n\n

Kalksvampe som Sycon ciliatum<\/em>, kaldet urnesvampe, er fastsiddende. De lever som alle andre svampedyr af at filtrere vandet for mikroskopiske planktonalger og fritlevende bakterier. Det filtrerede vand forlader dyret som en jet gennem en \u00e5bning, som kan reguleres.<\/p>\n\n\n\n

\n
\"\"<\/figure>\n\n\n\n
\"\"<\/figure>\n<\/div>\n\n\n\n

P\u00e5 Marinbiologisk Forskningscenter (SDU) studeres urnesvampe vha. video time-lapse optagelser. I andre opstillinger m\u00e5les filtrations- og respirations-hastigheder.De viste svampedyr er mellem 5 og 15 mm store.<\/p>\n\n\n\n

Publications<\/strong><\/summary>\n

Goldstein, J., Bisbo, N., Funch, P., Daugaard, N.D., Larsen, P.S., Brewer, J.R.,\u00a0Riisg\u00e5rd, H.U.\u00a0(2024). Aquiferous system, filtration rates and hydrodynamics of a syconoid calcareous sponge\u00a0Urna<\/em>\u00a0sp. Mar. Biol. 171: 216.\u00a0https:\/\/doi.org\/10.1007\/s00227-024-04532-0<\/a><\/p>\n<\/details>\n","protected":false},"excerpt":{"rendered":"

Participants: Hans Ulrik Riisg\u00e5rd & Lars Kumala Abstract: Only little is known about motility in calcareous sponges, but they may share certain behavioral capabilities with the more complex demosponges. Yet, the mechanism underlying these behaviors, including the control of internal flow, remains poorly understood and warrants further investigation. All calcareous\u00a0sponges are marine and they are […]<\/p>\n","protected":false},"author":2,"featured_media":7031,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_uag_custom_page_level_css":"","footnotes":""},"class_list":["post-7010","page","type-page","status-publish","has-post-thumbnail","hentry"],"uagb_featured_image_src":{"full":["https:\/\/www.marbio.sdu.dk\/wp-content\/uploads\/2024\/11\/Featured_Sycon.jpg",1949,493,false],"thumbnail":["https:\/\/www.marbio.sdu.dk\/wp-content\/uploads\/2024\/11\/Featured_Sycon-150x38.jpg",150,38,true],"medium":["https:\/\/www.marbio.sdu.dk\/wp-content\/uploads\/2024\/11\/Featured_Sycon-300x76.jpg",300,76,true],"medium_large":["https:\/\/www.marbio.sdu.dk\/wp-content\/uploads\/2024\/11\/Featured_Sycon-768x194.jpg",768,194,true],"large":["https:\/\/www.marbio.sdu.dk\/wp-content\/uploads\/2024\/11\/Featured_Sycon-1024x259.jpg",1024,259,true],"1536x1536":["https:\/\/www.marbio.sdu.dk\/wp-content\/uploads\/2024\/11\/Featured_Sycon-1536x389.jpg",1536,389,true],"2048x2048":["https:\/\/www.marbio.sdu.dk\/wp-content\/uploads\/2024\/11\/Featured_Sycon.jpg",1949,493,false]},"uagb_author_info":{"display_name":"hur@biology.sdu.dk","author_link":"https:\/\/www.marbio.sdu.dk\/?author=2"},"uagb_comment_info":0,"uagb_excerpt":"Participants: Hans Ulrik Riisg\u00e5rd & Lars Kumala Abstract: Only little is known about motility in calcareous sponges, but they may share certain behavioral capabilities with the more complex demosponges. Yet, the mechanism underlying these behaviors, including the control of internal flow, remains poorly understood and warrants further investigation. All calcareous\u00a0sponges are marine and they are…","_links":{"self":[{"href":"https:\/\/www.marbio.sdu.dk\/index.php?rest_route=\/wp\/v2\/pages\/7010","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.marbio.sdu.dk\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.marbio.sdu.dk\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.marbio.sdu.dk\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.marbio.sdu.dk\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7010"}],"version-history":[{"count":35,"href":"https:\/\/www.marbio.sdu.dk\/index.php?rest_route=\/wp\/v2\/pages\/7010\/revisions"}],"predecessor-version":[{"id":7197,"href":"https:\/\/www.marbio.sdu.dk\/index.php?rest_route=\/wp\/v2\/pages\/7010\/revisions\/7197"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.marbio.sdu.dk\/index.php?rest_route=\/wp\/v2\/media\/7031"}],"wp:attachment":[{"href":"https:\/\/www.marbio.sdu.dk\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7010"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}