1
|
Ayadi ZEM, Tazerouti F. Microcotyle justinei n. sp. (Monogenea: Microcotylidae) from the Gills of the Cardinal Fish Apogon imberbis (Teleostei: Apogonidae) off the Algerian Coast of the Western Mediterranean. Acta Parasitol 2023; 68:842-852. [PMID: 37828251 DOI: 10.1007/s11686-023-00722-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Accepted: 09/05/2023] [Indexed: 10/14/2023]
Abstract
PURPOSE A new monogenean Microcotyle justinei n. sp. (Monogenea: Microcotylidae) is described based on specimens found on the gill filaments of the cardinal fish Apogon imberbis (Apogonidae) off the Algerian coast of the Western Mediterranean. METHODS Monogeneans were examined, measured and drawn for a comparative morphological study with other species of Microcotyle and characterised molecularly using a partial fragment of the mitochondrial cytochrome c oxidase subunit 1 (cox1) gene. The identification of fish was confirmed by molecular barcoding using the cox1 gene. RESULTS The new species is distinguished from all other species of the genus by a combination of features, such as the number and size of the clamps, the shape and size of the genital atrium and the number of testes. The molecular analysis of the cox1 gene sequences showed that interspecific differences between Microcotyle justinei n. sp. and published sequences of Microcotyle spp. was greater than 8.8%, strongly suggesting that the new species is distinct from other congeners with sequences available on GenBank. CONCLUSION The morphological and molecular analyses support the status of M. justinei as a new species. The present finding extends the list of Microcotyle spp. to 72.
Collapse
Affiliation(s)
- Zouhour El Mouna Ayadi
- Laboratoire de Biodiversité et Environnement: Interactions et Génomes, Faculté des Sciences Biologiques, Université des Sciences et de la Technologie Houari Boumediene, BP 32, El Alia Bab Ezzouar, Algiers, Algeria.
| | - Fadila Tazerouti
- Laboratoire de Biodiversité et Environnement: Interactions et Génomes, Faculté des Sciences Biologiques, Université des Sciences et de la Technologie Houari Boumediene, BP 32, El Alia Bab Ezzouar, Algiers, Algeria
| |
Collapse
|
2
|
Kamio Y, Inoue A, Nitta M. Description of a new species, Pseudodiscocotyla mikiae n. sp. (Monogenea: Discocotylidae) parasitic on gills of Pristipomoides filamentosus from off Okinawa-jima island in Japan, with redescription of Pseudodiscocotyla opakapaka. Syst Parasitol 2023; 100:657-671. [PMID: 37796361 DOI: 10.1007/s11230-023-10115-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Accepted: 09/08/2023] [Indexed: 10/06/2023]
Abstract
Two species of Pseudodiscocotyla Yamaguti, 1965 (Monogenea: Discocotylidae) were collected from crimson jobfish Pristipomoides filamentosus (Valenciennes) (Perciformes: Lutjanidae) off Okinawa-jima island, southern Japan. Pseudodiscocotyla opakapaka is redescribed and represents the first Japanese record. A new species, Pseudodiscocotyla mikiae n. sp., differs from Ps. opakapaka in the absence of spines around the male genital pore, the shape of the vaginal pore, the presence of spines inside the vaginal pore, and the shape of the clamp. The locations of the male genital atrium and the vaginal pore in both species were similar, and the observed armament differences of the male copulatory organ are therefore presumed to establish reproductive isolation. The phylogenetic trees for the Mazocraeidea based on the partial 28S rDNA sequences were created using new sequences of Pseudodiscocotyla mikiae n. sp., and Discocotylidae formed a sister group with the species Diclidophoridae, Macrovalvitrematidae, and Plectanocotylidae. Pristipomoides filamentosus is widely distributed across the Indo-Pacific, and Pseudodiscocotyla mikiae n. sp. could share the distribution of the host.
Collapse
Affiliation(s)
- Yusuke Kamio
- Hakuryo Junior and Senior High School, 2260 Amida, Amida-cho, Takasago, Hyogo, 676-0827, Japan.
| | - Aina Inoue
- Hakuryo Junior and Senior High School, 2260 Amida, Amida-cho, Takasago, Hyogo, 676-0827, Japan
| | - Masato Nitta
- Pathology Division, Nansei Field Station, Fisheries Technology Institute, Japan Fisheries Research and Education Agency, 422-1, Nakatsuhamaura, Minami-Ise, Watarai, Mie, 516-0193, Japan
| |
Collapse
|
3
|
The genus Microcotyle in Mediterranean scorpaenoids (Teleostei), including the description of Microcotyle merche n. sp. from Helicolenus dactylopterus (Delaroche, 1809). J Helminthol 2023; 97:e25. [PMID: 36805046 DOI: 10.1017/s0022149x23000019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
More than 65 species of the genus Microcotyle Van Beneden & Hesse, 1863, have been described to date, most of them infecting Perciformes. Among the scorpaenoids (Perciformes, formerly Scorpaeniformes) the species of the genus Microcotyle parasitize sebastids and scorpaenids worldwide. In this study, we provide new morphological and molecular data for Microcotyle spp. in sebastids and scorpaenids from the Western Mediterranean and north-east Atlantic. Specimens of Helicolenus dactylopterus (Delaroche, 1809) (n = 107) and Scorpaena spp. (n = 107) were examined and their microcotylid specimens morphologically and molecularly characterized. Microcotyle merche n. sp. ex H. dactylopterus and specimens of Microcotyle algeriensis Ayadi, Gey, Justine & Tazerouti, 2016 from a new host and locality (Scorpaena scrofa from the north-east Atlantic) are herein described. Both species are phylogenetically close, but their morphology is markedly different mostly because the anterior lobe of the haptor present in other Microcotyle species is almost absent in M. algeriensis. Findings of M. merche n. sp. in the Mediterranean also excludes the presence of Microcotyle sebastis in this sea, encouraging the review of the exceptionally large host range and geographical distribution of this species.
Collapse
|
4
|
Nitta M. Capsalid monogeneans of fishes from the Seto Inland Sea, Japan: Description of Benedenia kobudai n. sp. parasitic on Semicossyphus reticulatus (Perciformes: Labridae). Parasitol Int 2023; 92:102677. [DOI: 10.1016/j.parint.2022.102677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 08/24/2022] [Accepted: 09/06/2022] [Indexed: 11/26/2022]
|
5
|
Farjallah S, Amor N, Garippa G, Montero FE, Víllora-Montero M, Mohamed OB, Merella P. Genetic variation of Sparicotyle chrysophrii (Monogenea: Microcotylidae) from the gilthead sea bream Sparus aurata (Teleostei: Sparidae) in the Mediterranean Sea. Parasitol Res 2023; 122:157-165. [PMID: 36418649 DOI: 10.1007/s00436-022-07709-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Accepted: 10/27/2022] [Indexed: 11/25/2022]
Abstract
The gill monogenean Sparicotyle chrysophrii (Van Beneden & Hesse, 1863) Mamaev, 1984 is a specific and common parasite of wild and cultured gilthead sea bream Sparus aurata Linnaeus, 1758, able to cause disease and mortality in aquaculture systems. Few molecular studies have been carried out on this monogenean, and its population structure and genetic diversity are barely known. This study provides the first contribution to the population genetic variation of S. chrysophrii, based on two molecular markers - the structural ribosomal RNA (rRNA) for the large subunit (28S) and the cytochrome c oxidase subunit I (COI) gene. Samples were collected from the gills of farmed and wild S. aurata from Italy and the Spanish Mediterranean. The analysis included previously published sequences. The 28S rDNA analysis was consistent with previous studies of specimens isolated from S. aurata and confirmed the presence of only one species on the gills of this host in the Mediterranean Sea. The COI sequences analysis suggested that the samples isolated in a previous study from a different host species, wild Boops boops (Linnaeus, 1758) in the Adriatic Sea, may represent a new undescribed sister species of S. chrysophrii. The low nucleotide diversity of S. chrysophrii isolated only from S. aurata versus the high haplotype diversity revealed small differences between haplotypes. The haplotypes shared between wild and farmed hosts from Spain provided the first molecular evidence of the possible transfer of S. chrysophrii between wild and farmed populations of S. aurata. The mtDNA COI analysis did not show a clear genetic structure, probably the result of several factors including coevolution, wild and farmed host interactions, and host population structure in space and time.
Collapse
Affiliation(s)
- Sarra Farjallah
- Laboratory of Biodiversity, Parasitology & Aquatic Ecosystems (LR18ES05), University Tunis EL Manar, Tunis, Tunisia
| | - Nabil Amor
- Laboratory of Biodiversity, Parasitology & Aquatic Ecosystems (LR18ES05), University Tunis EL Manar, Tunis, Tunisia.
| | - Giovanni Garippa
- Parassitologia e Malattie Parassitarie, Dipartimento di Medicina Veterinaria, Università di Sassari, Via Vienna 2, 07100, Sassari, Italy
| | - Francisco E Montero
- Marine Zoology Unit, Cavanilles Institute of Biodiversity and Evolutionary Biology, Science Park, University of Valencia, C/Catedrático José, Beltrán 2, 46980, Paterna, Spain
| | - María Víllora-Montero
- Marine Zoology Unit, Cavanilles Institute of Biodiversity and Evolutionary Biology, Science Park, University of Valencia, C/Catedrático José, Beltrán 2, 46980, Paterna, Spain
| | - Osama Badri Mohamed
- Department of Zoology, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
| | - Paolo Merella
- Parassitologia e Malattie Parassitarie, Dipartimento di Medicina Veterinaria, Università di Sassari, Via Vienna 2, 07100, Sassari, Italy
| |
Collapse
|
6
|
Nitta M, Kondo Y, Ohtsuka S, Kamarudin AS, Ismail N. Kannaphallus leptosomus n. sp. (Monogenea: Heteraxinidae: Cemocotylinae) parasitizing Scyris indica (Carangiformes: Carangidae) from Malaysia. Syst Parasitol 2022; 99:587-599. [PMID: 35717649 DOI: 10.1007/s11230-022-10048-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Accepted: 05/25/2022] [Indexed: 10/17/2022]
Abstract
A new monogenean species, Kannaphallus leptosomus n. sp., from the gills of the diamond trevally, Scyris indica Rüppell, caught off Terengganu, Peninsular Malaysia is described with molecular data. The new species differs from other species of the genus by the morphology of the largest clamp, the presence of a penis gun-associated needle, the unarmed genital atrium size, and the presence of two independent vaginal tubes. Previous records of Kannaphallus species were compiled, and four nominal species including one species incertae sedis (K. virilis Unnithan, 1957; K. lateriporis Mamaev, 1988; K. leptosomus n. sp.; and K. mochimae Fuentes Zambrano, 1998 incertae sedis) and two undescribed species recorded as invalid names were listed. Cemocotylelloides carangis Ramalingam, 1969 was considered a junior objective synonym of K. univaginalis Ramalingam, 1960; this species was treated as Cemocotylelloides univaginalis n. comb. In addition, Unnithan's materials including type specimens of K. virilis could not be found in specimen repositories in India, and it appears that the specimens were probably not deposited in any institution or have been subsequently lost. Based on the phylogenetic analysis of 28S rDNA sequences, Heteraxinidae was broadly divided into two clades, and Heteraxininae and Cemocotylinae were shown as polyphyletic groups, respectively.
Collapse
Affiliation(s)
- Masato Nitta
- Setouchi Parasite Biodiversity Laboratory, 3-2-20-103, Ushita-Honmachi, Higashi-ku, Hiroshima, 732-0066, Japan. .,Laboratory of Bioresources, National Institute for Basic Biology, 38, Nishigonaka, Myodaiji, Okazaki, Aichi, 444-8787, Japan. .,Pathology Division, Nansei Field Station, Fisheries Technology Institute, Japan Fisheries Research and Education Agency, 422-1, Nakatsuhamaura, Minami-Ise, Mie, 516-0193, Japan.
| | - Yusuke Kondo
- Takehara Station, Setouchi Field Science Center, Graduate School of Integrated Sciences for Life, Hiroshima University, 5-8-1, Minato-machi, Takehara, Hiroshima, 725-0024, Japan
| | - Susumu Ohtsuka
- Takehara Station, Setouchi Field Science Center, Graduate School of Integrated Sciences for Life, Hiroshima University, 5-8-1, Minato-machi, Takehara, Hiroshima, 725-0024, Japan
| | - Ahmad Syazni Kamarudin
- School of Animal Science, Aquatic Science and Environmental, Faculty of Bioresources and Food Industry, Universiti Sultan Zainal Abidin, 22200, Besut, Terengganu, Malaysia
| | - Norshida Ismail
- School of Animal Science, Aquatic Science and Environmental, Faculty of Bioresources and Food Industry, Universiti Sultan Zainal Abidin, 22200, Besut, Terengganu, Malaysia
| |
Collapse
|
7
|
Nam UH, Kim JH. Development of a PCR-RFLP method for differential identification of Microcotyle sebastis and Microcotyle caudata isolated from cultured rockfish in Korea. JOURNAL OF FISH DISEASES 2022; 45:411-419. [PMID: 34905238 DOI: 10.1111/jfd.13569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 11/23/2021] [Accepted: 11/29/2021] [Indexed: 06/14/2023]
Abstract
Microcotylid monogeneans can cause considerable health problems in cultured fish, and several Microcotyle species are reported from scorpaenid fish, an economically important aquaculture target species in Korea. We developed a PCR-RFLP assay targeting the mitochondrial cox1 gene, for discriminating Microcotyle sebastis and M. caudata from cultured Korean rockfish Sebastes schlegelii and dark-banded rockfish S. inermis. AseI enzyme treatment of the PCR products showed that M. sebastis sequence was cleaved while M. caudata was not. A total of 95.2% (118/124) of monogeneans from S. schlegelii were identified as M. sebastis, and 96.2% (126/131) of monogeneans from S. inermis were identified as M. caudata by PCR-RFLP. However, the remaining parasites from each host showed the opposite digestion pattern. Additional analyses of these specimens by targeting the ITS region by PCR-RFLP showed the same results, suggesting that cross-species infection by the parasites may have occurred. In Korea, S. inermis net cages are commonly located nearby S. schlegelii net cages, and this encaged proximity might have provided the opportunity for cross-infection to occur. Further examination of wild host populations and experimental cross-infection will be necessary to explain this phenomenon. The PCR-RFLP method in this study will help investigate the epidemiology and infection dynamics of Microcotyle species in S. inermis.
Collapse
Affiliation(s)
- U-Hwa Nam
- Department of Marine Bioscience, Gangneung-Wonju National University, Gangneung, South Korea
| | - Jeong-Ho Kim
- Department of Marine Bioscience, Gangneung-Wonju National University, Gangneung, South Korea
| |
Collapse
|
8
|
Hossen MS, Barton DP, Wassens S, Shamsi S. Occurrence and molecular identification of Monogenea from blue-spotted flathead Platycephalus caeruleopunctatus (Scorpaeniformes: Platycephalidae) in Australian waters. Parasitol Res 2022; 121:573-590. [PMID: 35039961 DOI: 10.1007/s00436-021-07404-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Accepted: 12/06/2021] [Indexed: 10/19/2022]
Abstract
This study describes the occurrence and molecular identification of Monogenea from blue-spotted flathead Platycephalus caeruleopunctatus (McCulloch) (Scorpaeniformes: Platycephalidae) from waters off the NSW coast, Australia. Platycephalus spp. are favoured by consumers for delicate, white, mild flavoured flesh and therefore are commercially important species within Australia. Platycephalus spp. are also extensively targeted by Australian recreational fishers. There has been no previous study that has exclusively focused on Pl. caeruleopunctatus in Australia or globally. Although a single study by Dillon (1985), of monogeneans infecting Platycephalus spp. from Australian waters, identified Microcotyle bassensis Murray, 1931 in Pl. caeruleopunctatus. The present study combines both morphological and molecular methods to identify both host and parasites. A total of 116 fish, sourced from the waters off the coast of New South Wales, Australia, were examined. A total of 1498 Monogenea were recovered from the gills. The overall prevalence, mean intensity, and mean abundance were 72%, 18.05, and 12.91, respectively. Monogenea were initially classified morphologically as two different species M. bassensis (family: Microcotylidae) and Platycephalotrema bassense (Hughes, 1928) Kritsky & Nitta, 2019 (family: Ancyrocephalidae). Molecular identification of Monogenea was conducted through sequencing of their mitochondrial cytochrome c oxidase subunit 1 (cox1) and nuclear 28S genes. The specific identification of host Pl. caeruleopunctatus was confirmed through sequencing the cox1 gene. There was no comparable sequence for cox1 and 28S genes available in GenBank for the monogenean species found in the present study. Only a single sequence (obtained from the nuclear ITS2-rDNA) was deposited in GenBank for M. bassensis. However, the phylogenetic analyses of mitochondrial and nuclear sequences revealed that the identified Monogenea clustered according to their familial groups. Platycephalotrema bassense was identified for the first time in Pl. caeruleopunctatus in the present study. This study has provided the first evidence for the exploration of both cox1 and 28S sequences of all Monogenea. The findings of this study serve as a foundation for future monogenean research on other Platycephalus spp. from Australian waters.
Collapse
Affiliation(s)
- Md Shafaet Hossen
- School of Agriculture, Environment and Veterinary Sciences, Charles Sturt University, Wagga Wagga, NSW, 2678, Australia. .,Department of Fisheries Biology and Genetics, Agricultural University, Mymensingh, 2202, Bangladesh.
| | - Diane P Barton
- School of Agriculture, Environment and Veterinary Sciences, Charles Sturt University, Wagga Wagga, NSW, 2678, Australia
| | - Skye Wassens
- School of Environmental Sciences & Institute of Land, Water and Society, Charles Sturt University, Albury, NSW, 2640, Australia
| | - Shokoofeh Shamsi
- School of Agriculture, Environment and Veterinary Sciences, Charles Sturt University, Wagga Wagga, NSW, 2678, Australia
| |
Collapse
|
9
|
Lablack L, Rima M, Georgieva S, Marzoug D, Kostadinova A. Novel molecular data for monogenean parasites of sparid fishes in the Mediterranean and a molecular phylogeny of the Microcotylidae Taschenberg, 1879. CURRENT RESEARCH IN PARASITOLOGY & VECTOR-BORNE DISEASES 2021; 2:100069. [PMID: 36589867 PMCID: PMC9795350 DOI: 10.1016/j.crpvbd.2021.100069] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/07/2021] [Revised: 12/05/2021] [Accepted: 12/09/2021] [Indexed: 01/04/2023]
Abstract
During a study of the monogeneans of four sparid fishes (Diplodus vulgaris, Pagellus bogaraveo, Pagrus pagrus and Sparus aurata) from the Western Mediterranean off Algeria, a large collection of parasites was characterised molecularly (28S rRNA and cox1 genes). A total of 46 partial sequences (23 for each gene) were generated from 38 isolates of monogeneans which included four species (Atrispinum acarne, Microcotyle erythrini (sensu stricto), Sparicotyle chrysophrii and Prostatomicrocotylinae gen. sp.) of the family Microcotylidae, two putative species of the family Capsalidae (Encotyllabe spp.), and one species (Choricotyle chrysophryi) of the family Diclidophoridae. Our study provides (i) the first molecular data for the Capsalidae in the Mediterranean; (ii) the first record of a member of the Prostatomicrocotylinae in the Mediterranean and in a sparid fish (D. vulgaris); (iii) the first cox1 sequences for A. acarne; (iv) the second record of M. erythrini (s.s.) from P. pagrus; and (v) the second confirmed by molecular data record of S. chrysophrii in wild populations of S. aurata. The first phylogenetic hypotheses for the family Microcotylidae developed here, revealed the monophyly of the subfamily Prostatomicrocotylinae and the genus Microcotyle but the relationships among the subfamilies were still largely unresolved with the best represented subfamily Microcotylinae being polyphyletic. Our results highlight the importance of molecular methods in the assessment of monogenean diversity and the need for a thorough taxon-sampling approach to increase the accuracy of phylogenetic reconstruction of the relationships of the large and taxonomically complex polyopisthocotylean family Microcotylidae.
Collapse
Affiliation(s)
- Lamia Lablack
- Laboratoire Réseau de Surveillance Environnementale, Faculté des Sciences de la Nature et de la Vie, Université Oran 1 Ahmed Ben Bella, Département de Biologie, 31000 Oran, Algeria
| | - Mohammed Rima
- Laboratoire Réseau de Surveillance Environnementale, Faculté des Sciences de la Nature et de la Vie, Université Oran 1 Ahmed Ben Bella, Département de Biologie, 31000 Oran, Algeria,Département en Eau Environnement et Développement Durable, Faculté des Sciences de la Nature et de la Vie, Université Hassiba BenBouali de Chlef, B.P 78C, Ouled Fares 02180, Chlef, Algeria
| | - Simona Georgieva
- Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences, 2 Gagarin Street, 1113 Sofia, Bulgaria,Institut Cavanilles de Biodiversitat i Biologia Evolutiva, Parc Científic, Universitat de València, PO Box 22085, Valencia 46071, Spain
| | - Douniazed Marzoug
- Laboratoire Réseau de Surveillance Environnementale, Faculté des Sciences de la Nature et de la Vie, Université Oran 1 Ahmed Ben Bella, Département de Biologie, 31000 Oran, Algeria
| | - Aneta Kostadinova
- Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences, 2 Gagarin Street, 1113 Sofia, Bulgaria,Corresponding author.
| |
Collapse
|
10
|
Song JY, Kim KY, Choi SW. Occurrence and Molecular Identification of Microcotyle sebastis Isolated from Fish Farms of the Korean Rockfish, Sebastes schlegelii. THE KOREAN JOURNAL OF PARASITOLOGY 2021; 59:89-95. [PMID: 33684992 PMCID: PMC7939961 DOI: 10.3347/kjp.2021.59.1.89] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Accepted: 01/15/2021] [Indexed: 11/23/2022]
Abstract
Microcotyle sebastis is a gill monogenean ectoparasite that causes serious problems in the mariculture of the Korean rockfish, Sebastes schlegelii. In this study, we isolated the parasite from fish farms along the coasts of Tongyeong, South Korea in 2016, and characterized its infection, morphology and molecular phylogeny. The prevalence of M. sebastis infection during the study period ranged from 46.7% to 96.7%, and the mean intensity was 2.3 to 31.4 ind./fish, indicating that the fish was constantly exposed to parasitic infections throughout the year. Morphological observations under light and scanning electron microscopes of the M. sebastis isolates in this study showed the typical characteristics of the anterior prohaptor and posterior opisthaptor of monogenean parasites. In phylogenetic trees reconstructed using the nuclear 28S ribosomal RNA gene and the mitochondrial cytochrome c oxidase I gene (cox1), they consistently clustered together with their congeneric species, and showed the closest phylogenetic relationships to M. caudata and M. kasago in the cox1 tree.
Collapse
Affiliation(s)
- Jun-Young Song
- Pathology Research Division, National Institute of Fisheries Science, Busan 46083, Korea
| | - Keun-Yong Kim
- Department of Genetic Analysis, AquaGenTech Co., Ltd, Busan 48300, Korea
| | - Seo-Woo Choi
- Southeast Sea Fisheries Research Institute, National Institute of Fisheries Science, Tongyeong, 53085, Korea
| |
Collapse
|