FN Archimer Export Format PT J TI Trematode genetic patterns at host individual and population scales provide insights about infection mechanisms BT AF Correia, Simão Fernández-Boo, Sergio Magalhães, Luísa de Montaudouin, Xavier Daffe, Guillemine Poulin, Robert Vera, Manuel AS 1:1,2,3,4;2:2;3:1;4:5;5:6;6:4;7:3; FF 1:;2:;3:;4:;5:;6:;7:; C1 CESAM, Department of Biology, University of Aveiro, 3810-193 Aveiro, Portugal Aquatic and Animal Health group, CIIMAR, University of Porto, 4450-208 Matosinhos, Portugal Department of Zoology, Genetics and Physical Anthropology, University of Santiago de Compostela, 27002 Lugo, Spain Department of Zoology, University of Otago, 9054 Dunedin, New Zealand CNRS, UMR EPOC, Station Marine, University of Bordeaux, F-33120 Arcachon, France Université de Bordeaux, CNRS, Observatoire Aquitain des Sciences de l’Univers, UAR 2567 POREA, F-33615, Pessac, France C2 UNIV AVEIRO, PORTUGAL UNIV PORTO, PORTUGAL UNIV SANTIAGO DE COMPOSTELA, SPAIN UNIV OTAGO, NEW ZEALAND CNRS, FRANCE UNIV BORDEAUX, FRANCE IN DOAJ IF 2.4 TC 0 UR https://archimer.ifremer.fr/doc/00858/97024/105718.pdf https://archimer.ifremer.fr/doc/00858/97024/107882.pdf https://archimer.ifremer.fr/doc/00858/97024/107883.tif LA English DT Article BO Planula IV DE ;Bucephalus minimus;Cerastoderma edule;clonal diversity;COI;host-parasite interactions;parasite;population genetics AB Multiple parasites can infect a single host, creating a dynamic environment where each parasite must compete over host resources. Such interactions can cause greater harm to the host than single infections and can also have negative consequences for the parasites themselves. In their first intermediate hosts, trematodes multiply asexually and can eventually reach up to 20% of the host’s biomass. In most species, it is unclear whether this biomass results from a single infection or co-infection by two or more infective stages (miracidia), the latter being more likely a priori in areas where prevalence of infection is high. Using as model system the trematode Bucephalus minimus and its first intermediate host cockles, we examined the genetic diversity of the cytochrome c oxidase subunit I (COI) region in B. minimus from three distinct geographical areas and performed a phylogeographic study of B. minimus populations along the Northeast Atlantic coast. Within localities, the high genetic variability found across trematodes infecting different individual cockles, compared to the absence of variability within the same host, suggests that infections could be generally originating from a single miracidium. On a large spatial scale, we uncovered significant population structure of B. minimus, specifically between the north and south of Bay of Biscay. Although other explanations are possible, we suggest this pattern may be driven by the population structure of the final host. PY 2023 PD NOV SO Parasitology SN 0031-1820 PU Cambridge University Press (CUP) VL 150 IS 13 UT 001137470900003 BP 1207 EP 1220 DI 10.1017/S0031182023000987 ID 97024 ER EF