Effects of various treatments on hatching of eggs and viability of oncomiracidia of the monogenean Pseudodactylogyrus anguillae and Pseudodactylogyrus bini

Umeda, Naoko; Nibe, Harunao; Hara, Takashi; Hirazawa, Noritaka

doi:10.1016/j.aquaculture.2005.08.009

Cited by 34 publications

(18 citation statements)

References 7 publications

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“…Similarly, Lekimme et al (2006) showed that phoxim had some low ovicidal effect against mite eggs of Psoroptes ovis. Our results demonstrated that trichlorfon had no effect on egg hatching, a finding supported by Giolo et al (2009) and Umeda et al (2006) who reported that trichlorfon had no significant effect on the egg hatching success of Chrysoperla carnea and Pseudodactylogyrus. There had been few reports about the effects of mebendazole and the ethyl acetate extract of E. fischeriana on egg hatching and embryonic development of D. vastator.…”

Section: Discussionsupporting

confidence: 87%

The efficacy of four common anthelmintic drugs and traditional Chinese medicinal plant extracts to control Dactylogyrus vastator (Monogenea)

Zhang

et al. 2014

Aquaculture

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Section: Discussionsupporting

confidence: 87%

The efficacy of four common anthelmintic drugs and traditional Chinese medicinal plant extracts to control Dactylogyrus vastator (Monogenea)

Zhang

et al. 2014

Aquaculture

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“…In relation to the most effective chemicals used to kill oncomiracidia, Umeda et al . () demonstrated potassium permanganate concentrations of 20 mg L −1 effectively immobilized all oncomiracidia of the monogenean Pseudodactylogyrus spp. Gusev.…”

Section: Discussionmentioning

confidence: 99%

“…In relation to the most effective chemicals used to kill oncomiracidia, Umeda et al (2006) demonstrated potassium permanganate concentrations of 20 mg L À1 effectively immobilized all 2006). Similarly, this study showed immersion in 100 lL L À1 formalin or freshwater immobilized all Neobenedenia oncomiracidia in <2 h. Furthermore, the allicin concentration (15.2 lL L À1 ) needed to immobilize all Neobenedenia oncomiracidia within a 2-h period is lower than the concentration of any chemical previously reported to immobilize monogenean oncomiracidia.…”

Section: Discussionmentioning

confidence: 99%

Efficacy of garlic (Allium sativum) extract applied as a therapeutic immersion treatment for Neobenedenia sp. management in aquaculture

Militz

Southgate

Carton

et al. 2013

Journal of Fish Diseases

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Garlic, Allium sativum L., extract administered as a therapeutic bath was shown to have antiparasitic properties towards Neobenedenia sp. (MacCallum) (Platyhelminthes: Monogenea) infecting farmed barramundi, Lates calcarifer (Bloch). The effect of garlic extract (active component allicin) immersion on Neobenedenia sp. egg development, hatching success, oncomiracidia (larvae) longevity, infection success and juvenile Neobenedenia survival was examined and compared with freshwater and formalin immersion. Garlic extract was found to significantly impede hatching success (5% ± 5%) and oncomiracidia longevity (<2 h) at allicin concentrations of 15.2 μL L(-1) , while eggs in the seawater control had >95% hatching success and mean oncomiracidia longevity of 37 ± 3 h. At much lower allicin concentrations (0.76 and 1.52 μL L(-1)), garlic extract also significantly reduced Neobenedenia infection success of L. calcarifer to 25% ± 4% and 11% ± 4%, respectively, compared with 55% ± 7% in the seawater control. Juvenile Neobenedenia attached to host fish proved to be highly resistant to allicin with 96% surviving 1-h immersion in 10 mL L(-1) (15.2 μL L(-1) allicin) of garlic extract. Allicin-containing garlic extracts show potential for development as a therapy to manage monogenean infections in intensive aquaculture with the greatest impact at the egg and larval stages.

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“…An accurate counting method is a key initial component in developing an understanding of the effects and management of L. bidyana in aquaculture. The initial benefit to industry will be reducing the chance of overestimation of intensity that can result in premature use of treatments leading to increased cost and increased stress to fish (Grant 2002), and likelihood of emergence of resistance (Umeda et al 2006), or of underestimation of intensity, causing an increased likelihood of the farmed fish being negatively affected by their L. bidyana load.…”

Section: Discussionmentioning

confidence: 99%

Host impact of monogenean Lepidotrema bidyana infection and intensity estimates for onsite monitoring

Forwood¹,

Harris²,

Deveney³

2012

Dis. Aquat. Org.

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We developed a rapid effective method for accurate estimation of intensity for the monogenean Lepidotrema bidyana, a gill parasite of silver perch Bidyanus bidyanus. This parasite requires monitoring because high-intensity infections reduce host growth and can lead to secondary bacterial and fungal infections. The most accurate method for counting L. bidyana was visual examination of fresh gills. There was a significant relationship between fish size and parasite intensity; however, there was no significant relationship between fish condition and parasite intensity. Parasite intensity estimates were generated by using the mean intensity of worms on the posterior hemibranch on the first left gill arch, compared to the total mean intensity of worms on all hemibranchs. Estimates were validated by predicting L. bidyana intensity from a random sample of silver perch obtained from aquaculture ponds. Parasite intensity estimates correlated strongly to real counts, and this method can be used to accurately predict parasite intensity on an individual host, and thus represents an improvement over previous methods. KEY WORDS: Monogenea · Bidyanus bidyanus · Lepidotrema bidyana · Prevalence · Intensity Resale or republication not permitted without written consent of the publisherDis Aquat Org 100: [51][52][53][54][55][56][57] 2012 tions. Extrinsic influences include interspecific competition, predation, hyperparasitism and re inforcement of interspecific reproductive barriers (Rohde 1979). The main intrinsic influence is enhance ment of mating success (Rohde 1991, 1993, Geets et al. 1997.In aquaculture, parasite management systems rely on accurate monitoring methods specific to the target species (Grant 1983). When developing specific counting methods, non-random parasite distributions must be considered. Rowland et al. (2006b) monitored Lepidotrema bidyana by sampling 5 Bidyanus bidyanus fish from each treated pond, re moving the anterior-most left gill arch from each fish, examining that arch at 100× magnification, counting the number of parasites in 5 fields of view and reporting the prevalence and mean number of parasites per field of view. Which part or side of the gill should be examined was not specified (Rowland et al. 2006b). Field veterinarians expressed doubt that the method provided accurate intensity estimates. We evaluated this current counting method, and developed a new method to more accurately estimate L. bidyana intensity on an individual host. This method will aid onsite monitoring and research on treatments, and provides information on the relationships between intensity and host growth and condition. We also investigated the relationship between parasite intensity and fish size, and the effect that parasite intensity has on the condition of the host. MATERIALS AND METHODS Source of fish and parasitesSilver perch (n = 660) infected with Lepidotrema bidyana from Pioneer Fish Farm (PFF) (Gloucester, NSW) were maintained in a 10 000 l recirculation tank at Flinders University, South Australia ...

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Effects of various treatments on hatching of eggs and viability of oncomiracidia of the monogenean Pseudodactylogyrus anguillae and Pseudodactylogyrus bini

Cited by 34 publications

References 7 publications

The efficacy of four common anthelmintic drugs and traditional Chinese medicinal plant extracts to control Dactylogyrus vastator (Monogenea)

The efficacy of four common anthelmintic drugs and traditional Chinese medicinal plant extracts to control Dactylogyrus vastator (Monogenea)

Efficacy of garlic (Allium sativum) extract applied as a therapeutic immersion treatment for Neobenedenia sp. management in aquaculture

Host impact of monogenean Lepidotrema bidyana infection and intensity estimates for onsite monitoring

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