Community ecology of the metazoan parasites of snoek <i>Thyrsites atun</i> (Euphrasen, 1791) (Perciformes: Gempylidae) off South Africa

Nunkoo, Irfan; Reed, CC; Kerwath, Sven E.

doi:10.2989/1814232x.2016.1216892

Cited by 13 publications

(3 citation statements)

References 59 publications

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“…While Tiralongo et al (2020) assigned plerocercoids found in the silver scabbardfish from the Mediterranean to the species H. trichiuri, the occurrence of M. uncinatus in this fish from the Mediterranean Sea represents a new host record for the parasite species, and it expands its known range of distribution. To date, larval stages of M. uncinatus have been previously recorded only in the musculature of snoek, Thyrsites atun (Euphrasen, 1791) from Cape Campbell, Cook Strait (Robinson, 1958), New Zealand waters (Palm, 2004) and from off the South Africa coast (Nunkoo, Reed, & Kerwath, 2016); in M. mola from Indonesia waters (Palm, 2004), and in Xiphias gladius from Sri Lanka (De Silva, Fernando, Ranatunga, & De Silva, 2017). Whereas plerocercoids of H. trichiuri were found in several fish species in all the world's oceans (Palm & Caira, 2008).…”

Section: Discussionmentioning

confidence: 99%

First molecular detection of the parasites Molicola uncinatus and Hepatoxylon trichiuri (Cestoda: Trypanorhyncha) infecting the silver scabbardfish Lepidopus caudatus from the Central Mediterranean Sea: Implications for the seafood quality and safety

et al. 2021

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Trypanorhynch tapeworms are marine heteroxenous parasites, involving sharks and rays as definitive hosts, invertebrates (i.e. crustaceans) as first intermediate hosts, and various teleost fishes as intermediate/paratenic ones. The massive presence of Trypanorhyncha larval forms in the flesh or body cavity of the fish hosts reduces their market value, making them unappealing to consumers, or causing discards of fish products. The identification of merocercoids (N = 100) of Molicola uncinatus and plerocercoids (N = 46) of Hepatoxylon trichiuri parasitizing the silver scabbardfish, Lepidopus caudatus, from the Central Mediterranean Sea (off Malta coast), was obtained, for the first time, by using sequences analysis of the complete small subunit (ssrDNA) and the partial large subunit (lsrDNA) ribosomal RNA gene loci. The Bayesian Inference from the concatenated sequences obtained at the two gene loci showed that the individuals of M. uncinatus and H. trichiuri clustered, respectively, in two well distinct and supported phylogenetic lineages, corresponding to the two cestode species. High prevalence (P) and mean abundance (MA) values were observed in the infection with merocercoids of M. uncinatus (P = 100%, A = 28.81), with the ventral musculature of the silver scabbardfish as the most parasitized site. Plerocercoids of H. trichiuri were found to infect only the mesenteries, attached to various fish tissues, with a mean abundance rate of 1.28. Even if harmless to humans, a heavy parasitic load with larval stages of Trypanorhyncha, particularly in the edible part of the silver scabbardfish (as here reported for merocercoids of M. uncinatus), can compromise the appearance of the fish-food, making it repugnant and unappealing for the final consumer. It has been also discussed that when managing the risk related to parasites affecting the fish quality and safety of fisheries products, the fishing ground where the life cycle of those parasites takes place should be also taken into account, as it would include the ecological drivers of the infection with those parasites. This wider ecological approach would be of help to the Food Business Operators (FBOs), gathering knowledge useful to manage fisheries in a wide "One-Health" perspective, aware of sustainability, quality and consumer safety aspects of seafood production.

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Section: Discussionmentioning

confidence: 99%

First molecular detection of the parasites Molicola uncinatus and Hepatoxylon trichiuri (Cestoda: Trypanorhyncha) infecting the silver scabbardfish Lepidopus caudatus from the Central Mediterranean Sea: Implications for the seafood quality and safety

et al. 2021

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“…The prevalence of T. coryphaenae (6%) recorded along the coast of Benin was lower than that recorded off the coast of South Africa in oilfish ( Ruvettus pretiosus ) (100%) and snoek ( Thryrsites atun ) (49.7%) [ 38 , 39 ], and in the black scabbardfish ( Aphanopus carbo ) (25.8%) from Portuguese waters [ 40 ]. However, the prevalence was higher than those recorded from Scomber japonicus (2%) and South African sardines ( Sardinops sagax ) (1%) off the coast of South Africa [ 7 , 41 ].…”

Section: Discussionmentioning

confidence: 99%

Parasites of Sardinella maderensis (Lowe, 1838) (Actinopterygii: Clupeidae) and Their Potential as Biological Tags for Stock Identification along the Coast of West Africa

Ogbon

Afoakwah

Mireku

et al. 2023

Biology

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This study is the first to provide information on the parasite fauna of Sardinella maderensis along the coasts of Benin and Ghana, and the first to investigate the potential use of parasites as biological tags in fish population studies in the area. It may thus serve as a starting point for upcoming studies. From February to June 2021, a total of 200 S. maderensis were sampled from the fishing port of Cotonou (Benin) and the Elmina landing site (Ghana). The prevalence and abundance of each parasite were recorded. The following are the outcomes of this study: Parasite species, such as Parahemiurus merus, Mazocraeoides sp. and Hysterothylacium fortalezae, were recorded along the coasts of Benin and Ghana, while Anisakis sp(p). and Tentacularia coryphaenae were only recorded along the coast of Benin. Parahemiurus merus was the most prevalent and abundant among all the parasites recorded. Anisakis sp(p). and T. coryphaenae were selected as having potential in the stock identification of S. maderensis. Both parasites were only recorded along the coast of Benin at a low prevalence. As a result, examinations of more S. maderensis from each location for these parasites may justify their use in stock identification studies.

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“…Estudios de carga parasitaria en la zona oceánica de Sudáfrica revelan homogeneidad de la comunidad de endoparásitos de vida larga, lo que sugiere la existencia de una sola población de T. atun. También sugieren que la estabilidad y la aleatoriedad en la adquisición de los parásitos se pueden atribuir al comportamiento de alimentación oportunista y su movimiento nómada (Nunkoo et al 2016).…”

Section: Unidades Poblacionales Migraciones Y Desplazamientosunclassified

Estado del conocimiento biológico y pesquero de <i>Thyrsites atun</i> en el hemisferio sur

Carimán

Reyes

2019

Rev. biol. mar. oceanogr.

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Se presenta un análisis comparativo y síntesis del estado actual del conocimiento biológico y pesquero de Thyrsites atun en el hemisferio sur. La sierra T. atun, es un pez pelágico de la familia Gempylidae, que habita aguas frías y se distribuye en sectores australes del hemisferio sur, donde sigue un patrón de alimentación oportunista sobre pequeñas presas pelágicas. Hay poblaciones en África del Sur (AS), Australia (AU) y Nueva Zelanda (NZ), pero en Chile (CL) se desconoce la existencia de unidades poblaciones. En CL, las edades registradas alcanzan entre 1 y 6 años y la talla de primera madurez sexual (TPMS) ha sido estimada en 65,6 cm de longitud horquilla (LH). El presente estudio concluye que en CL existe poca información biológico-pesquera de la sierra en comparación a los otros países donde la especie también es un recurso pesquero.

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Community ecology of the metazoan parasites of snoek Thyrsites atun (Euphrasen, 1791) (Perciformes: Gempylidae) off South Africa

Cited by 13 publications

References 59 publications

First molecular detection of the parasites Molicola uncinatus and Hepatoxylon trichiuri (Cestoda: Trypanorhyncha) infecting the silver scabbardfish Lepidopus caudatus from the Central Mediterranean Sea: Implications for the seafood quality and safety

First molecular detection of the parasites Molicola uncinatus and Hepatoxylon trichiuri (Cestoda: Trypanorhyncha) infecting the silver scabbardfish Lepidopus caudatus from the Central Mediterranean Sea: Implications for the seafood quality and safety

Parasites of Sardinella maderensis (Lowe, 1838) (Actinopterygii: Clupeidae) and Their Potential as Biological Tags for Stock Identification along the Coast of West Africa

Estado del conocimiento biológico y pesquero de <i>Thyrsites atun</i> en el hemisferio sur

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