Journal of Helminthology最新文献

On misidentification of metacercariae of Posthodiplostomum minimum (MacCallum, 1921) Dubois, 1936, in Nearctic minnows. 新北极鲦鱼中最小后囊蚴（pothodiplostomum minimum, MacCallum, 1921）的错误鉴定

IF 1.6 3区生物学

Journal of Helminthology Pub Date : 2026-05-08 DOI: 10.1017/S0022149X26101485

B Burris-Otero, T J Achatz, D J Marcogliese, F B Reyda, T J Colston, S A Locke

{"title":"On misidentification of metacercariae of Posthodiplostomum minimum (MacCallum, 1921) Dubois, 1936, in Nearctic minnows.","authors":"B Burris-Otero, T J Achatz, D J Marcogliese, F B Reyda, T J Colston, S A Locke","doi":"10.1017/S0022149X26101485","DOIUrl":"https://doi.org/10.1017/S0022149X26101485","url":null,"abstract":"Posthodiplostomum minimum (MacCallum, 1921) Dubois, 1936 (Digenea, Diplostomidae) was described from adult worms from a great blue heron (Ardea herodias; Ardeidae) in New York. Metacercariae have been widely reported from diverse freshwater fishes, despite early experimental work and recent molecular data indicating exclusive infection of minnows (Leuciscidae) in North America. We compared the type specimens of P. minimum to adults taken from domestic chicks (Gallus gallus domesticus) fed metacercariae from fathead minnow (Pimephales promelas; Leuciscidae), as well as adults in naturally infected ardeid hosts. Sequences of cytochrome c oxidase I (CO1) showed these specimens were conspecific with worms from leuciscids and ardeids sampled across North America. However, adult morphology of the species with metacercariae in North American leuciscids differed markedly from the type specimens of P. minimum. Consequently, we resurrect and transfer to Posthodiplostomum Dubois, 1936, the earliest name for the lineage infecting leuciscids in North America: Posthodiplostomum vancleavei (Agersborg, 1926) n. comb. In North America, the four most likely junior synonyms of P. minimum are Posthodiplostomum aztlanensis González-García, López-Jiménez, Ortega-Olivares, Sereno-Uribe, Pérez-Ponce de León et García-Varela, 2024, Posthodiplostomum dawnsherryae Achatz, Von Holten, Pritchard et Keel, 2025, Posthodiplostomum nanum Dubois, 1937, and Posthodiplostomum seminolense Achatz, Von Holten, Pritchard et Keel, 2025. Sequences of CO1 indicate P. vancleavei n. comb. has been introduced in Japan and we discuss the high likelihood of its establishment in Europe. The complete rDNA operon and near-complete mitochondrial genome sequence of P. vancleavei show expected phylogenetic affiliation with Posthodiplostomum centrarchi Hoffman, 1958.","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":"100 ","pages":"e46"},"PeriodicalIF":1.6,"publicationDate":"2026-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147838820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An expanded species-area perspective on helminth diversity and infection load in lizards: A phylogenetic comparative approach. 扩展物种-区域视角研究蜥蜴的寄生虫多样性和感染负荷：系统发育比较方法。

IF 1.6 3区生物学

Journal of Helminthology Pub Date : 2026-05-05 DOI: 10.1017/S0022149X26101448

A A M Teixeira, S V Brito, S C Ribeiro, F H Yamada, W O Almeida, D O Mesquita

{"title":"An expanded species-area perspective on helminth diversity and infection load in lizards: A phylogenetic comparative approach.","authors":"A A M Teixeira, S V Brito, S C Ribeiro, F H Yamada, W O Almeida, D O Mesquita","doi":"10.1017/S0022149X26101448","DOIUrl":"https://doi.org/10.1017/S0022149X26101448","url":null,"abstract":"Hosts function as ecological islands for endoparasites, offering structured habitats that support parasite survival, growth, and reproduction. Larger and older hosts are often expected to harbour more diverse and abundant parasitic assemblages due to increased structural complexity and longer exposure times. In this study, we investigated how host body size and phylogenetic relatedness influence endoparasite mean richness and mean intensity of infection in lizards from the Atlantic Rainforest of northeastern Brazil. We analysed 121 parasitised specimens representing 15 species, recording body size metrics (SVL and mass) and calculating parasitological indices. Significant phylogenetic signal was detected for host body size (SVL and mass) and mean intensity of infection, whereas no phylogenetic signal was found for mean parasite richness. Contrary to the island theory predictions, PGLS models revealed a significant negative relationship between mean SVL/mass and mean intensity of infection. Furthermore, no significant relationship was found between host body size (SVL or mass) and mean parasite richness, regardless of the evolutionary model used. The pPCA identified a predominance of global structure (phylogenetic relatedness), explaining 42.15% of the variation, while local structures, reflecting niche differentiation, accounted for 18.61%. Our results demonstrate that lizard-parasite interactions are shaped by a complex synergy between conserved evolutionary templates and opportunistic ecological responses, highlighting the necessity of integrated phylogenetic approaches in parasitological studies.","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":"100 ","pages":"e45"},"PeriodicalIF":1.6,"publicationDate":"2026-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147838837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Two trematode species, Pseudoparabascus khotenovskii comb. n. and Acanthatrium ovatum (Trematoda: Microphalloidea), from East Asia: morphological and molecular data. 两种吸虫，霍特诺夫斯基拟副丝虫梳状体。产自东亚的卵形棘藻（滴虫目：小滴虫总科）：形态和分子资料。

IF 1.6 3区生物学

Journal of Helminthology Pub Date : 2026-05-04 DOI: 10.1017/S0022149X26101461

Y V Tatonova, V V Besprozvannykh

{"title":"Two trematode species, Pseudoparabascus khotenovskii comb. n. and Acanthatrium ovatum (Trematoda: Microphalloidea), from East Asia: morphological and molecular data.","authors":"Y V Tatonova, V V Besprozvannykh","doi":"10.1017/S0022149X26101461","DOIUrl":"https://doi.org/10.1017/S0022149X26101461","url":null,"abstract":"In this report, morphological and molecular characteristics are provided for two members of the subfamily Microphalloidea distributed in the south of the Russian Far East. Some of trematode specimens found in larvae of mayflies, stoneflies, and caddisflies and then experimentally reared to the adult stage in hamsters, according to their morphological features, belong to the species Acanthatrium ovatum previously recorded from Japanese bats. Molecular data has confirmed their membership in the family Lecithodendriidae and similarity to trematodes identified as Lecithodendriidae sp. F from Japan. The other specimens, experimentally reared in chickens, according to their morphological characteristics, meet the diagnostic criteria of the genus Parabascus. However, this species is not clustered with representatives of this taxon in the phylogenetic reconstruction based on 28S rRNA gene data. A molecular analysis has shown that it forms a single cluster with Pachypsolus irroratus and is a member of the family Pachypsolidae. It is here placed in the new genus Pseudoparabascus n. g. under the name Pseudoparabascus khotenovskii comb. n. The phylogenetic reconstructions based on two other markers, the cox1 mtDNA gene and the ITS2 rDNA region, have confirmed the assignment of these specimens obtained in both experiments to the above-considered taxonomic groups.","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":"100 ","pages":"e44"},"PeriodicalIF":1.6,"publicationDate":"2026-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147816100","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

First report of Gyrodactylus teuchis (Monopisthocotyla: Gyrodactylidae) on farmed rainbow trout Oncorhynchus mykiss (Walbaum, 1792) in Russia. 俄罗斯养殖虹鳟Oncorhynchus mykiss （Walbaum, 1792）上发现Gyrodactylus teuchis（单子叶目：Gyrodactylidae）。

IF 1.6 3区生物学

Journal of Helminthology Pub Date : 2026-05-04 DOI: 10.1017/S0022149X26101321

A Parshukov, E Ieshko, S Sokolov, L Mugue, N Mugue

{"title":"First report of Gyrodactylus teuchis (Monopisthocotyla: Gyrodactylidae) on farmed rainbow trout Oncorhynchus mykiss (Walbaum, 1792) in Russia.","authors":"A Parshukov, E Ieshko, S Sokolov, L Mugue, N Mugue","doi":"10.1017/S0022149X26101321","DOIUrl":"https://doi.org/10.1017/S0022149X26101321","url":null,"abstract":"We recorded Gyrodactylus teuchis Lautraite, Blanc, Thiery, Daniel & Vigneulle, 1999 on one-year-old farmed rainbow trout Oncorhynchus mykiss (Salmoniformes, Salmonidae) from Lake Kalmozero (White Sea drainage system, Republic of Karelia, Russia) in May and October 2023. Morphological identification of these specimens was confirmed by molecular data on the mitochondrial cytochrome c oxidase subunit 1 (cox1) gene and the ribosomal internal transcribed spacer 2 (ITS2). Analyses of the newly obtained cox1 gene sequences show they are identical to fragments of sequences of this gene for G. teuchis individuals collected from wild S. trutta in Slovenia and from farmed S. trutta in Russia. Sequencing of the ITS2 region revealed ribotype D found previously in wild S. trutta and S. fontinalis in Austria, and in farmed S. trutta and O. mykiss in Poland. The infection prevalences in the caged rainbow trout were 100% and 75%, and the mean abundances were 20.8 and 18.1 ind., in May and October, respectively. There were no significant differences between the parasite abundance distributions in these two months, likely indicating similar levels of resistance to the infection. This is the first report on G. teuchis from the White Sea drainage basin as well as in farmed rainbow trout in Russia. This new finding is a signal for veterinary authorities to strengthen parasitological monitoring of transported stocking material.","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":"100 ","pages":"e43"},"PeriodicalIF":1.6,"publicationDate":"2026-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147816079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Morphological and molecular analyses of the taxonomy and phylogenetic position of Heterobothrium fluviatile (Monogenoidea: Diclidophoridae), a parasite of the gill lamellae of the Nile puffer, Tetraodon lineatus (Tetraodontiformes: Tetraodontidae) in Egypt. 埃及尼罗河河豚（Tetraodon lineatus, tetraodonformes: Tetraodontidae）鳃片寄生虫的形态和分子分类及系统发育位置分析。

IF 1.6 3区生物学

Journal of Helminthology Pub Date : 2026-04-24 DOI: 10.1017/S0022149X26101473

A Mansour, D C Kritsky

{"title":"Morphological and molecular analyses of the taxonomy and phylogenetic position of Heterobothrium fluviatile (Monogenoidea: Diclidophoridae), a parasite of the gill lamellae of the Nile puffer, Tetraodon lineatus (Tetraodontiformes: Tetraodontidae) in Egypt.","authors":"A Mansour, D C Kritsky","doi":"10.1017/S0022149X26101473","DOIUrl":"https://doi.org/10.1017/S0022149X26101473","url":null,"abstract":"Specimens of the Nile puffer, Tetraodon lineatus Linnaeus (Tetraodontiformes: Tetraodontidae), were collected from the Nile River, Qena Governorate, Egypt (26°08'N, 32°42'E), and examined for monogenoidean parasites. A single species, initially identified as Heterobothrium lineatum Morsy, Saady, Abdel-Gaffar, Bashtar, Melhorn, Al Quraishy & Adel, 2012 (Monogenoidea: Diclidophoridae), was recovered from the gill lamellae of six out of seven examined hosts (prevalence = 86%). The taxonomic and phylogenetic status of this helminth was reassessed using an integrative approach combining morphological and molecular data. Comparative morphological analysis revealed that H. lineatum represented a junior subjective synonym of H. fluviatile Euzet & Birgi, 1975. Molecular analysis based on the 28S rDNA gene, representing the first inclusion of H. fluviatile as an ingroup taxon, placed this species within a well-supported clade of Heterobothrium species infecting tetraodontid fishes. Heterobothrium indicum Verma, 2022, a parasite of the goldband goatfish, Upeneus moluccensis (Bleeker) (Mulliformes: Mullidae), is herein transferred to Upenicola Unnithan, 1966 as Upenicola indicus (Verma, 2022) n. comb. The study highlighted the need for further investigation into the taxonomic status of Diclidophora indica Tripathi, 1959, and Neodiclidophora simhai Gupta & Krishna, 1980, as probable members of Heterobothrium. Moreover, Heterobothrium lamothei of Morsy et al. (nec Vidal Martinez & Mendoza-Franco) is regarded as a species inquirenda.","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":"100 ","pages":"e42"},"PeriodicalIF":1.6,"publicationDate":"2026-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147773378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A taxonomical re-evaluation of Schistocephalus sp. (Cestoda: Diphyllobothriidea) from Siberian cottid fishes (Russia). 标题俄罗斯西伯利亚尾鱼中头血吸虫属的分类学再评价。

IF 1.6 3区生物学

Journal of Helminthology Pub Date : 2026-04-21 DOI: 10.1017/S0022149X26101382

P Vlasenko, T Kolmogorova, N Korostelev, G Markevich, A Matveev, D Batranin, K Savina, A Gusenkov, E Kashinskaya, M Solovyev

{"title":"A taxonomical re-evaluation of Schistocephalus sp. (Cestoda: Diphyllobothriidea) from Siberian cottid fishes (Russia).","authors":"P Vlasenko, T Kolmogorova, N Korostelev, G Markevich, A Matveev, D Batranin, K Savina, A Gusenkov, E Kashinskaya, M Solovyev","doi":"10.1017/S0022149X26101382","DOIUrl":"10.1017/S0022149X26101382","url":null,"abstract":"Schistocephalus spp. are widely distributed Holarctic cestodes that comprise key model species for host-parasite studies. S. solidus and S. pungitii, the most extensively studied species, exhibit narrow host specificity. Another species, S. cotti, is known from the European bullhead (Cottus gobio); however, information on its host range, geographical distribution, and molecular data remain poorly characterized. In Siberia, plerocercoids of Schistocephalus found in sculpins were previously recorded from endemic cottid fishes of Lake Baikal and were identified as S. solidus, which is inconsistent with the known host specificity of this species. The present study aims to clarify the species identity of Schistocephalus from Siberian cottid fishes using morphological and molecular data, and to test the hypothesis of conspecificity of Schistocephalus plerocercoids from sculpin hosts across Eurasia and North America. Morphologically, Siberian plerocercoids correspond to the description of S. cotti, supporting their assignment to this species. The phylogenetic analysis confirmed the identity of the plerocercoids as S. cotti and demonstrated the existence of two distinct Schistocephalus lineages in North America and Siberia. These findings indicate that at least two different Schistocephalus species infect sculpins in the Old and New Worlds.","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":"100 ","pages":"e41"},"PeriodicalIF":1.6,"publicationDate":"2026-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147729268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A new Platynosomoides (Trematoda: Dicrocoeliidae) parasitic in the sigmodontine rodent Akodon cursor from the Atlantic Forest of Brazil, with the first molecular genetic characterization from a species within the genus. 巴西大西洋森林棘齿目啮齿动物棘齿游标中新发现的一种棘齿类（吸虫目：棘齿科）的分子遗传特征。

IF 1.6 3区生物学

Journal of Helminthology Pub Date : 2026-04-20 DOI: 10.1017/S0022149X26101333

A J R Dias, D S Lemes, B E Andrade-Silva, R V Vilela, J L Luque Alejos, A Maldonado Júnior, R O Simões

{"title":"A new Platynosomoides (Trematoda: Dicrocoeliidae) parasitic in the sigmodontine rodent Akodon cursor from the Atlantic Forest of Brazil, with the first molecular genetic characterization from a species within the genus.","authors":"A J R Dias, D S Lemes, B E Andrade-Silva, R V Vilela, J L Luque Alejos, A Maldonado Júnior, R O Simões","doi":"10.1017/S0022149X26101333","DOIUrl":"https://doi.org/10.1017/S0022149X26101333","url":null,"abstract":"We describe a new species of the genus Platynosomoides Yamaguti, 1971 (Trematoda: Dicrocoeliidae) from the bile ducts of the cricetid Akodon cursor (Winge, 1887) (Rodentia: Sigmodontinae) from Itatiaia National Park (Parque Nacional do Itatiaia, PNI), in the state of Rio de Janeiro, Brazil. The species is characterized by the following diagnostic features: body size; dimensions and relative proportions of the testes in relation to the body length; extracecal and asymmetrical vitelline glands commencing at the level of the acetabulum, the left vitellarium terminating at the mid-region of the second third of the body, and the right one extending to the anterior margin of the posterior third; and the relative size of the suckers, with the ventral sucker being approximately 60% larger than the oral sucker. The morphological characteristics were described with the assistance of optical microscopy images to observe the internal structures, and their external details were provided by scanning electron microscopy (SEM). Additionally, molecular phylogenetic analyses based on the 18S rRNA gene were conducted to assess the phylogenetic placement of the genus within Dicrocoeliidae. These analyses accompany the description of Platynosomoides macrotestis sp. nov. and contribute to a better understanding of trematode diversity. Furthermore, this study highlights the importance of parasitological research in conserving helminth biodiversity. Its occurrence in conservation areas, such as the PNI, supports the maintenance of unique ecological interactions and species conservation.","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":"100 ","pages":"e40"},"PeriodicalIF":1.6,"publicationDate":"2026-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147722961","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Morphological and molecular data for Neocatatropis primorskii n. g. n. sp. and Notocotylus ikutai Sasaki & Nakao, 2021 (Trematoda: Notocotylidae). Neocatatropis primorskii n. g. n. sp.和Notocotylus ikutai Sasaki & Nakao， 2021（水蚤目：Notocotylidae）的形态和分子数据。

IF 1.6 3区生物学

Journal of Helminthology Pub Date : 2026-04-20 DOI: 10.1017/S0022149X26101436

A V Izrailskaia, V V Besprozvannykh

引用次数: 0

Description of Paraschistorchis australiensis n. sp. (Digenea: Megaperidae) as a distinct species from Paraschistorchis seychellesiensis (Toman, 1989). 澳洲副chistorchis australiensis n. sp. （Digenea: Megaperidae）作为一种与塞舌尔副chistorchis seychellesensis不同的种的描述（Toman, 1989）。

IF 1.6 3区生物学

Journal of Helminthology Pub Date : 2026-04-16 DOI: 10.1017/S0022149X26101266

Y F M Karar, C K Blend, A Mansour

{"title":"Description of Paraschistorchis australiensis n. sp. (Digenea: Megaperidae) as a distinct species from Paraschistorchis seychellesiensis (Toman, 1989).","authors":"Y F M Karar, C K Blend, A Mansour","doi":"10.1017/S0022149X26101266","DOIUrl":"https://doi.org/10.1017/S0022149X26101266","url":null,"abstract":"Differences in testes arrangement and length of post-testicular region between Australian specimens of Paraschistorchis seychellesiensis sensu Magro, Cutmore, Carrasson & Cribb, 2023 and the original description of Paraschistorchis seychellesiensis (Toman, 1989) Blend, Karar & Dronen, 2017 from the Indian Ocean have raised a question whether such variations are intraspecific or interspecific variations. To address this, in-depth morphological descriptions and species delimitation analyses were conducted using a combination of comparative morphology, multivariate classification analyses, and host-parasite data. The Australian population of P. seychellesiensis differs from all known species of Paraschistorchis Blend, Karar & Dronen, 2017 by a broad linguiform body, a ventral sucker noticeably smaller than the oral sucker, a subquadrate pharynx that is partly dorsal to the oral sucker, and testes arrangement in a cluster configuration, as well as its distinct spatial clustering within all multivariate classification analyses without any intrusion into the space occupied by another cluster. Furthermore, the distinctive extension of the anterior vitellarium, significant differences in anterior testis/ovary ratios, and egg sizes indicate that Australian and Indian specimens of P. seychellesiensis are two distinct species. The apparent comparatively distant geographic localities, each with distinct ecosystems (Seychelles Islands vs Great Barrier Reef [GBR], Australia), are an interesting outcome of the recognition of separate species. Accordingly, Paraschistorchis australiensisn. sp. is established to accommodate this Australian record. Given the detailed review and newly added data provided herein, we discuss the nature of the excretory vesicle within schistorchiines and amend the key to the recognized species of Paraschistorchis.","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":"100 ","pages":"e38"},"PeriodicalIF":1.6,"publicationDate":"2026-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147690514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Far away from home: gastrointestinal parasites trace the journey of a grey seal (Halichoerus grypus) from the Wadden Sea to the Mediterranean Sea. 远离家乡：胃肠道寄生虫追踪一只灰海豹（Halichoerus grypus）从瓦登海到地中海的旅程。

IF 1.6 3区生物学

Journal of Helminthology Pub Date : 2026-04-13 DOI: 10.1017/S0022149X26101345

C Pons-Bordas, A García-Gallego, M D M Palacios Otero, F J Aznar

{"title":"Far away from home: gastrointestinal parasites trace the journey of a grey seal (Halichoerus grypus) from the Wadden Sea to the Mediterranean Sea.","authors":"C Pons-Bordas, A García-Gallego, M D M Palacios Otero, F J Aznar","doi":"10.1017/S0022149X26101345","DOIUrl":"https://doi.org/10.1017/S0022149X26101345","url":null,"abstract":"Grey seals, Halichoerus grypus (GSs), inhabit cold temperate and subarctic waters along the North Atlantic Ocean. Individuals of GS can regularly disperse towards southern areas (ca. 38°N-39°N) but occurrence at lower latitudes is exceptional. On 18 February 2022, a 217-cm-long male of GS was detected in waters off the SW Atlantic coast of Spain (37°N), then entered the western Mediterranean Sea and wandered for 15 days until he died. Here, we use gastrointestinal parasites to investigate the geographical origin of the GS and the length of the journey towards Mediterranean waters. Seven helminth taxa were found, namely, the digeneans Ascocotyle septentrionalis and Cryptocoyle lingua, the nematodes Contracaecum osculatum s.s., Anisakis simplex s.s., and A. pegreffii, and the acanthocephalans Corynosoma sp.1 and C. magdaleni (= strumosum) or C. nortmeri. The parasite composition closely resembles that reported in native harbour seals (Phoca vitulina) of the Wadden Sea (ca. 51°-55°N), from where A. septentrionalis is apparently endemic. Considering that (i) A. septentrionalis cannot be acquired out of the Wadden Sea, and (ii) the lifespan and population structure of the parasites found, we infer that the GS came from waters near the Wadden Sea, and the length of the journey was ca. 1 month, with presumably little ingestion of (parasitized) food. To our knowledge, this is the first study using parasites to unveil the geographical mobility of pinnipeds.","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":"100 ","pages":"e37"},"PeriodicalIF":1.6,"publicationDate":"2026-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147674094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0