المؤلفون: Jensen, C.A., Nielsen, Else, Wegeberg, A.M.

المصدر: Jensen , C A , Nielsen , E & Wegeberg , A M 2005 , Rødspætter og isinger i Århus Bugt . DFU-rapport , nr. 148-05 , Danmarks Fiskeriundersøgelser , Charlottenlund . < http://www.difres.dk/dk/publication/files/10082005Test$Samlet%20version.pdf >

مصطلحات موضوعية: Erhvervsfiskeri

وصف الملف: application/pdf

الإتاحة: https://orbit.dtu.dk/en/publications/0d4088bb-8bf7-405f-9f40-b131b36827cdTest
https://backend.orbit.dtu.dk/ws/files/6593568/Samlet%20version.pdfTest
http://www.difres.dk/dk/publication/files/10082005Test$Samlet%20version.pdf

المؤلفون: de Montaudouin, Xavier, Wegeberg, A.M., Jensen, Kurt Thomas, Sauriau, Pierre-Guy

المساهمون: Environnements et Paléoenvironnements OCéaniques (EPOC), Observatoire aquitain des sciences de l'univers (OASU), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École Pratique des Hautes Études (EPHE), Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), LIttoral ENvironnement et Sociétés (LIENSs), La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS)

المصدر: ISSN: 0177-5103 ; Diseases of Aquatic Organisms ; https://hal.science/hal-01853956Test ; Diseases of Aquatic Organisms, 1998, 34, pp.63 - 70. ⟨10.3354/dao034063⟩.

مصطلحات موضوعية: Trematode, Transmission efficiency, Metacercariae, Himasthla elongata, Flume, Dispersion, Cercariae, Cerastoderma edule, [SDV.BA.ZI]Life Sciences [q-bio]/Animal biology/Invertebrate Zoology

الوصف: International audience ; Digenean trematodes are widespread parasites of marine fauna. The first intermediate host of Himasthla elongata (Echinostomatidae) is the periwinkle Littorina littorea. The second host is less specific, as it includes various bivalve species. The definitive host is a waterbird. The free-living cercaria acts to ensure transmission from the first and second intermediate hosts. We examined the impact of water flow (still and running water) and host size (6-8, 8-10, 10-12 mm shell length classes) on the settling success of H. elongata cercariae in the second intermediate host by utilizing the common cockle Cerastoderma edule. Under 2 scenarios (free-stream velocity of 0 and 6 cm s-1) more than 90% of the experimental population of cockles (90 individuals per replicate) acquired infections and 60% of the added cercariae were recovered as metacercariae in cockle tissue (mainly foot and siphons). Infection intensity increased significantly with cockle size. Considering the filtering capacity of cockles, the dimension of the flume, and the flow velocity, a passive infection mechanism is proposed based on the suspension feeding activity of the host organism. The scale of potential dispersal of H. elongata is at least a few hundred metres.

العلاقة: hal-01853956; https://hal.science/hal-01853956Test; https://hal.science/hal-01853956/documentTest; https://hal.science/hal-01853956/file/d034p063.pdfTest

الإتاحة: https://doi.org/10.3354/dao034063Test
https://hal.science/hal-01853956Test
https://hal.science/hal-01853956/documentTest
https://hal.science/hal-01853956/file/d034p063.pdfTest

المؤلفون: de Montaudouin, X., Jensen, K.T., Desclaux, C., Wegeberg, A.M., Sajus, M.C.

المصدر: de Montaudouin , X , Jensen , K T , Desclaux , C , Wegeberg , A M & Sajus , M C 2005 , ' Effect of intermediate host size ( Cerastoderma edule ) on infectivity of cercariae of Himasthla quissetensis (Echinostomatidae: Trematoda) ' , J. Mar. Biol. Ass. U.K. , vol. 85 , pp. 809-812 .

الإتاحة: https://pure.au.dk/portal/da/publications/effect-of-intermediate-host-size-cerastoderma-edule-on-infectivity-of-cercariae-of-himasthla-quissetensis-echinostomatidae-trematodaTest(b5982780-5d0c-11db-bee9-02004c4f4f50).html

المؤلفون: Wegeberg, A.M., Jensen, K.T.

المصدر: Wegeberg , A M & Jensen , K T 2003 , ' In situ growth of juvenile cockles, Cerastoderma edule , experimentally infected with larval trematodes ( Himasthla interrupta ) ' , Journal of Sea Research , vol. 50 , pp. 37-43 . < http://www.elsevier.com/locate/searesTest >

الإتاحة: https://pure.au.dk/portal/da/publications/in-situ-growth-of-juvenile-cockles-cerastoderma-edule-experimentally-infected-with-larval-trematodes-himasthla-interruptaTest(1490cef0-fd26-11da-bee9-02004c4f4f50).html
http://www.elsevier.com/locate/searesTest

المؤلفون: Wegeberg, A.M., De Montaudouin, X., Jensen, K.T.

المصدر: Wegeberg , A M , De Montaudouin , X & Jensen , K T 1999 , ' Effect of intermediate host size (cerastoderma edule) on infectivity of cercariae of three himasthla species (echinostomatidae, trematoda) ' , Journal of Experimental Marine Biology and Ecology , vol. 238 , no. 2 , pp. 259-269 . https://doi.org/10.1016/S0022-0981Test(98)00177-4

الوصف: To understand prevalence patterns of parasites in marine host populations experimental infection studies are required. Bivalves are important host organisms to a variety of trematodes species and in our study area (Wadden Sea) three different Himasthla species co-occur in cockle populations. These species are morphologically very similar but differ with respect to various morphometric dimensions. To study the possible functional importance of differences between Himasthla cercariae (the free-living stage shed from prosobranch snails and encysting as metacercariae in bivalves), we experimentally measured the infectivity of the three congeners in regard to different size groups of juvenile cockles. The smallest species, H. interrupta, has a high infectivity in small cockles (optimum around 4 mm), whereas the two other congeners H. continua and H. elongata exhibit low infection efficiencies in cockles less than 6 mm and higher efficiencies in larger cockles. Behavioural experiments were performed to identify proximate causes underlying the observed infection patterns. Parasite avoidance behaviour of the cockle varies in a host-parasite size-dependent manner so that a large cercaria tend to provoke an avoidance response in a small cockle. The possible consequences of the observed host size preferences in relation to definitive host species (waterbirds) are discussed and it is suggested that one or more of the parasite species are adapted to other host species and that their sympatric occurrence in cockles in our study area is a result of a spinoff from their main cycle mediated through migratory birds.

العلاقة: https://pure.au.dk/portal/en/publications/932fa030-d1a1-421c-8e44-12312ed31bb7Test

الإتاحة: https://doi.org/10.1016/S0022-0981Test(98)00177-4
https://pure.au.dk/portal/en/publications/932fa030-d1a1-421c-8e44-12312ed31bb7Test
http://www.scopus.com/inward/record.url?scp=0033562461&partnerID=8YFLogxKTest

المؤلفون: de Montaudouin, X., Wegeberg, A.M., Jensen, K.T.

المصدر: de Montaudouin , X , Wegeberg , A M & Jensen , K T 1998 , ' Infection characteristics of Himasthla elongata cercariae in cockles as a function of water current ' , Diseases of Aquatic Organisms (Online) , vol. 34 , no. 1 , pp. 63-70 .

الإتاحة: https://pure.au.dk/portal/da/publications/infection-characteristics-of-himasthla-elongata-cercariae-in-cockles-as-a-function-of-water-currentTest(6fd3a48e-18a0-4b67-b3d8-bbfcd5b4a7d1).html

المؤلفون: Wegeberg, A.M., Jensen, K.T.

المصدر: Journal of Sea Research; 1999, Vol. 42 Issue: 4 p325-331, 7p