Salsuginus seculus (Monogenea: Ancyrocephalidae) Newly Recorded from Japan, Infecting the Introduced Mosquitofish Gambusia affinis

Nitta, Masato; Nagasawa, Kazuya

doi:10.12782/sd.19.2.173

Cited by 3 publications

(1 citation statement)

References 16 publications

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“…Gambusia affinis plays host to several monogenean species, including Salsuginus seculus , Salsuginus bermudae Rand and Wiles, 1987, and Gyrodactylus gambusiae . The monogeneans of Gambusia affinis have been the subject of various ecological studies (Mizelle and Arcadi 1945 ; Rogers and Welborn Jr 1965 ; Hanek and Fernando 1972 ; Nitta and Nagasawa 2014 ; McAllister et al 2015 ; Vasquez 2016 ; Carpenter and Herrmann 2020 ). However, the seasonal changes of prevalence and intensity of specific species have not been previously studied.…”

Section: Introductionmentioning

confidence: 99%

Season, size, and sex: factors influencing monogenean prevalence and intensity on Gambusia affinis in New Zealand

Renner,

Duggan

2024

Parasitol Res

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A number of studies have been conducted on monogenean seasonality, though primarily in continental regions with wide annual temperatures ranges. We investigated seasonal changes in the prevalence and intensity of Salsuginus seculus infesting sexually dimorphic western mosquitofish (Gambusia affinis) in New Zealand. This represents the first examination of seasonality for this species globally, and the first seasonal assessment of any monogenean population in New Zealand, a temperate country with a mild oceanic climate. Prevalence and intensity of S. seculus with respect to fish size and sex was also examined. Prevalence of S. seculus changed temporally, peaking in summer, and was strongly positively correlated with algal concentrations. This relationship may be associated with increasing food levels, leading to an increase in fish courting and mating, resulting in high numbers and close physical associations of G. affinis individuals, facilitating transmission of the monogeneans. Thus, biotic factors may be important in determining temporal changes in S. seculus prevalence in New Zealand. Female G. affinis had a significantly higher prevalence and mean intensity of S. seculus than males. Longer fish had a higher mean intensity and prevalence of S. seculus. Female G. affinis likely host disproportionately more monogeneans as they are larger than males. Alternatively, females may have a compromised immune response during reproductive periods. Overall, seasonal change was observed in S. seculus prevalence and intensity under New Zealand’s mild climatic conditions, and the larger female G. affinis in this dimorphic species supported a greater prevalence and intensity of infestation than males.

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Section: Introductionmentioning

confidence: 99%

Season, size, and sex: factors influencing monogenean prevalence and intensity on Gambusia affinis in New Zealand

Renner,

Duggan

2024

Parasitol Res

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New records of nine monogenean parasites infesting non-native freshwater fish species in New Zealand

Renner,

Duggan

2024

New Zealand Journal of Marine and Freshwater Research

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Four Alien Monogeneans, Including <i>Trinigyrus peregrinus</i> n. sp., Parasitic on the Invasive Armored Catfish <i>Pterygoplichthys disjunctivus</i> (Siluriformes: Loricariidae) from Okinawa-jima Island, Okinawa Prefecture, Japan

Nitta

Nagasawa

2016

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lected from the gills of vermiculated sailfin catfish, Pterygoplichthys disjunctivus (Weber, 1991) (Siluriformes: Loricariidae), in inland waters of Okinawa-jima island, Okinawa Prefecture, Japan. Unilatus unilatus and U. brittani represent new country records for Japan. Trinigyrus peregrinus n. sp. is characterized by a coiled male copulatory organ that forms a circle and does not articulate with its accessory piece. Heteropriapulus heterotylus was newly collected from two rivers in south-central Okinawa-jima island. These monogeneans are all considered to be native to South America and to have been co-introduced with the host fish into the inland waters of the island by release of ornamental pet fish.

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Salsuginus seculus (Monogenea: Ancyrocephalidae) Newly Recorded from Japan, Infecting the Introduced Mosquitofish Gambusia affinis

Cited by 3 publications

References 16 publications

Season, size, and sex: factors influencing monogenean prevalence and intensity on Gambusia affinis in New Zealand

Season, size, and sex: factors influencing monogenean prevalence and intensity on Gambusia affinis in New Zealand

New records of nine monogenean parasites infesting non-native freshwater fish species in New Zealand

Four Alien Monogeneans, Including <i>Trinigyrus peregrinus</i> n. sp., Parasitic on the Invasive Armored Catfish <i>Pterygoplichthys disjunctivus</i> (Siluriformes: Loricariidae) from Okinawa-jima Island, Okinawa Prefecture, Japan

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