Experimental Infection of Striped Marshfrog Tadpoles (Limnodynastes peronii) by Ichthyophthirius multifiliis

Gleeson, D. J.

doi:10.2307/3285799

Cited by 5 publications

(5 citation statements)

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“…Both of these proposed growth inhibitors are ubiquitous pathogens, and may play a role in intraspecific and interspecific competition (Bardsley & Beebee, 1998; Gleeson, 1999; Kiesecker & Blaustein, 1999). Apparent competitive interactions (i.e.…”

Section: Introductionmentioning

confidence: 99%

Biological warfare in the garden pond: tadpoles suppress the growth of mosquito larvae

Mokany

Shine

2003

Ecological Entomology

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Abstract. 1. Although tadpoles and mosquito larvae may compete for scarce resources in natural freshwater systems, the mechanisms involved in such competition remain largely unstudied.2. Replicated artificial ponds were set up to examine the role of pathogenic interference (water-borne growth inhibitors) in two tadpole±mosquito systems from south-eastern Australia. One system comprised taxa that are commonly sympatric in freshwater ponds (tadpoles of Limnodynastes peronii and larvae of Culex quinquefasciatus) while the other comprised species that co-occur in brackish water ponds (tadpoles of Crinia signifera and larvae of Ochlerotatus australis).3. Water that had previously contained tadpoles suppressed the rates of survival and pupation of mosquito larvae in both systems. Fungicide reduced or eliminated this effect, suggesting that the growth inhibitors may be fungal organisms (possibly the yeast Rhodotorula glutinis) from tadpole faeces. Fungicide also enhanced growth rates of tadpoles.4. These results suggest that interference competition between tadpoles and mosquito larvae is mediated by other organisms in some ecological systems.

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Section: Introductionmentioning

confidence: 99%

Biological warfare in the garden pond: tadpoles suppress the growth of mosquito larvae

Mokany

Shine

2003

Ecological Entomology

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“…Also, important from an ethical view, infected fish can be disinfected quickly. Commonly known as ' Ich ', the causative agent of the white spot disease (ichthyophthiriasis), this protozoan can infect most, if not all, freshwater fish (Ventura & Paperna, 1985) and at least one species of amphibian (Gleeson, 1999). It has a direct life cycle with a dispersive, infective theront stage and a mature trophozoite, which lives immediately under the epidermis of the host (McCallum, 1982).…”

Section: Introductionmentioning

confidence: 99%

Differences in initial and acquired resistance to Ichthyophthirius multifiliis between populations of rainbowfish

Gleeson

McCallum

Owens

2000

Journal of Fish Biology

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Wild-caught rainbowfish Melanotaenia spp. originating from three isolated populations were infected with a quantified dosage of parasites Ichthyophthirius multifiliis in a controlled environment. The Melanotaenia eachamensis from Dirran Creek were much more susceptible to ichthyophthiriasis than were M. splendida from the Lake Tinaroo or Bluewater Creek populations. When the highly susceptible Dirran Creek rainbowfish were crossed with rainbowfish from a fourth population, Lake Eacham M. eachamensis, they produced hybrids with significantly higher resistance than pure-bred Dirran Creek, but not higher than pure-bred Lake Eacham fish. Hence, intraspecific hybridization increased resistance to I. multifiliis infection in M. eachamensis. Hosts from all three populations were much less susceptible to infection on their second exposure to the parasite. However, the Bluewater Creek population was better able to acquire immunity to I. multifiliis than either the Dirran Creek or Lake Tinaroo populations. It is tentatively suggested that there may be a link between the heterozygosity of populations of rainbowfish and their initial ability to resist infection by Ichthyophthirius multifiliis. 2000 The Fisheries Society of the British Isles

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“…In order to determine the possible biological causes associated with the mortality event in the Valcheta Stream, a series of variables was selected that had the potential to promote or contribute to an Ich outbreak in wildlife (Hoffman, 1970; Gleeson, 1999; Aihua & Buchmann, 2001; Dickerson, 2006; Dickerson, 2012; Harris et al, 2013; Mancini et al, 2016). The presence and abundance of each variable were recorded for each local population of naked characin in studies conducted prior to the Ich outbreak.…”

Section: Methodsmentioning

confidence: 99%

“…dead or sick individuals of this species were found during this investigation. Concerning frogs, although studies indicate the potential of Ich to infect tadpoles(Gleeson, 1999), there are no records of Ich disease outbreaks in wild frogs. Wild El Rinc on stream frogs are extensively distributed in the headwater of the Valcheta Stream across most of the sites investigated.…”

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confidence: 99%

Mass mortality of the Critically Endangered naked characin (Gymnocharacinus bergii): Possible causes and impact

Quiroga,

Povedano,

Solimano

et al. 2023

Aquatic Conservation

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The naked characin (Gymnocharacinus bergii) is the only endemic fish of the arid Patagonia of Argentina, living only in the thermal headwaters of the Valcheta Stream in the Somuncura Plateau. This species is listed as Critically Endangered on the IUCN Red List. In April 2018, a massive mortality event was observed in the species. Parasitological studies identified the cause as an epidemic of white spot disease, caused by the parasite Ichthyophthirius multifiliis (Ich). Ich is a common disease in aquaculture settings, but it has also been reported as an epizootic in wild fish populations across tropical and temperate regions worldwide. This occurrence is associated with the introduction of fish into non‐native environments. This article presents the first recorded instance of a mass mortality event and Ich outbreak in the naked characin. It includes a mapping of the disease in the headwaters of the stream, an estimation of the impact on the species' population size, and an analysis of potential causes associated with this epidemic. The results indicate that the epizootic produced mortality of 82% of the global population of the naked characin and was linked to the presence and high abundances of the invasive fish species Uruguay tetra (Cheirodon interruptus). The disease occurred in stream sectors where both characid species coexist, particularly in areas with the highest water temperatures. The Ich outbreak represents the most recent and severe threat recorded for the Critically Endangered naked characin. Implementing control measures against the invasive Uruguay tetra is imperative to prevent future outbreaks that could push the species to the brink of extinction in the near future. This study provides crucial information for assessing current management interventions and developing new strategies within the framework of the action plan for naked characin conservation.

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Experimental Infection of Striped Marshfrog Tadpoles (Limnodynastes peronii) by Ichthyophthirius multifiliis

Cited by 5 publications

References 0 publications

Biological warfare in the garden pond: tadpoles suppress the growth of mosquito larvae

Biological warfare in the garden pond: tadpoles suppress the growth of mosquito larvae

Differences in initial and acquired resistance to Ichthyophthirius multifiliis between populations of rainbowfish

Mass mortality of the Critically Endangered naked characin (Gymnocharacinus bergii): Possible causes and impact

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