Natural Infections of Clinostomum complanatum (Trematoda: Clinostomatidae) in Wild Herons and Egrets, Tottori Prefecture, Japan

Aohagi, Yoshiyuki; Shibahara, Toshiyuki; Motomura, Noboru; Yamaga, Yoshinori; Kagota, Katsumoto; Hayashi, Takatoshi

doi:10.7589/0090-3558-28.3.470

Cited by 21 publications

(13 citation statements)

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“…Clinostomum species, digenetic termatode, are common fish parasites throughout the world and the final hosts of this fluke are generally piscivorous birds, including herons and egrets [7]. The metacercariae embedded in the tissues of fish are freed in the host stomach and migrates up to the esophagus, and then attach to the throat or mouth cavity.…”

Section: Introductionmentioning

confidence: 99%

A Study of Clinostomum (Trematode) and Contracaecum (Nematode) Parasites Affecting Oreochromis Niloticus in Small Abaya Lake, Silite Zone, Ethiopia

Reshid¹,

Adugna²,

Redda³

et al. 2015

J Aquac Res Development

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This study was conducted at Lake Small Abaya Ethiopia, to identify Clinostomum and Contracaecum parasites from a total of 384 O. niloticus species sampled during November 2013-April 2014. Of the 384 samples collected, 138 (35.9%) were infested with nematode of Contracaecum species and 72 (18.8%) were infected with trematode of Clinostomum species. The intensity of infestation by Contracaecum and Clinostomum was 1-19 worms per fish (mean intensity=4.47) and 1-12 worms per fish (mean intensity=3.56) respectively. There was no significant difference (p>0.05) in the prevalence of infestation among host sex, host size and host weight. There was no any statistically significant (p>0.05) correlation between the number of Clinostomum, Contracaecum and the mixed number of parasites and the fish's condition. In conclusion, the study show that fish parasite are prevalent in Small Abaya lake .Hence, further studies and appropriate control measure are recommended to reduce their effect on the fishery industry and public health. (June, 2010). In the same feed item no significant difference in the nutrient content was found during the study period (Tables 1-4). Mean variationsThe variations in the mean values of nutrient contents (protein, lipid and carbohydrate) with different treatments of feed items are presented in Table 3 and Figures 1-3. Protein content significantly varied from 6.18 ± 0.13% with treatment T 6 (banana leaf) to 30.53 ± 0.40% with treatment T 3 (mustard oilcake). Lipid content significantly varied from 3.06 ± 0.09% with treatment T 6 (banana leaf) to 13.33 ± 0.10% with treatment T 3 (mustard oilcake). Carbohydrate significantly varied from 32.95 ± 0.29% with treatment T 3 (mustard oilcake) to 66.12 ± 0.47% with treatment T 2 (wheat bran). Discussion Monthly variations of the nutrient contentsProtein content varied from 6.05 ± 0.45% with (T 6 at 6 th month) to 31.20 ± 0.32% (T 3 at 2 nd month). Lipid content ranged from 2.95 ± 0.21% (T 6 at 5 th month) to 13.72 ± 0.36% (T 3 at 4 th month Study designA cross sectional study was conducted from November 2013 to April 2014 at Small Abaya Lake to determine the prevalence of parasitic infestation of O. niloticus /Nile tilapia/. The desired sample size was calculated using the formula given by Thrusfield [11]. By considering 95% confidence interval, 5% desired absolute precision and 50% expected prevalence and the total number of sample found to be 384. Study methodologySample collection: A total of 384 O. niloticus species of fish were sampled and examined. All the fish were caught using gill net with mesh size ranging from 6 to 12 cm. Harvested fishes were transported in ice to Ethiopian Institute of Agricultural Research, National Fisheries and other Aquatic Life Research Center, Sebeta, for analysis. The length (L) of fish was taken from the tip of the snout to the posterior tip of the caudal fin and was measured to the nearest ± 0.1 cm. The weight of the fish was measured to the nearest gram using an electric balance.Laboratory examinations: Each f...

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Section: Introductionmentioning

confidence: 99%

A Study of Clinostomum (Trematode) and Contracaecum (Nematode) Parasites Affecting Oreochromis Niloticus in Small Abaya Lake, Silite Zone, Ethiopia

Reshid¹,

Adugna²,

Redda³

et al. 2015

J Aquac Res Development

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“…In Japan, only one species, C. complanatum has been reported, and grey heron Ardea cinerea, great egret Ardea alba, intermediate egret Egretta intermedia, little egret Egretta garzetta and night heron Nycticorax nycticorax are known as final hosts (Shogaki, 1935;Kagei et al, 1988;Aohagi et al, 1992bAohagi et al, , 1993bSato et al, 2005;Uchida et al, 2005). Yamaguti (1933) obtained adult C. complanatum from a heron that was experimentally fed with metacercariae obtained from freshwater fish.…”

Section: Discussionmentioning

confidence: 99%

“…Within genus Clinostomum, only Clinostomum complanatum has been reported from the bird and fish hosts in Japan (Yamaguti, 1933;Shogaki, 1935;Kagei et al, 1988;Aohagi et al, 1992aAohagi et al, , 1992bAohagi et al, , 1993aAohagi et al, , 1993bAohagi et al, , 1995Aohagi and Shibahara, 1994;Sato et al, 2005;Uchida et al, 2005;Nagasawa et al, 2014). However, it is not clear if there is only one species in Japan, because detailed morphological observation or genetic analysis have not been conducted for about 30 years since the finding of adult worms by Kagei et al (1988).…”

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confidence: 99%

The Digenean <i>Clinostomum complanatum</i> Found from Great Cormorant <i>Phalacrocorax carbo</i> in Japan

Iwaki

Waki

Arakawa³

et al. 2018

Fish Pathol.

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Great cormorants Phalacrocorax carbo were found dead in a goldfish farm in Aichi Prefecture. They were infected with trematodes in the oral cavity. Based on morphological observation and genetic analysis, the trematodes were identified as Clinostomum complanatum. This is the first case reporting C. complanatum infection of great cormorants in Japan. Heavy metacercarial infection of goldfish was found in the same fish farm. The metacercariae were shown to be the same species as the adult worms from the bird by molecular analysis. These results suggest that great cormorant is involved in the life cycle of this trematode in farmed goldfish.

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“…The final hosts of this fluke are generally piscivorous birds, including herons and egrets [6]. The metacercariae embedded in the tissues of fish are freed in the host stomach and migrates up to the esophagus, and then attach to the throat or mouth cavity.…”

Section: Discussionmentioning

confidence: 99%

A Human Case of Clinostomum complanatum Infection in Korea

Park¹,

Kim

Joo

et al. 2009

Korean J Parasitol

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Natural Infections of Clinostomum complanatum (Trematoda: Clinostomatidae) in Wild Herons and Egrets, Tottori Prefecture, Japan

Cited by 21 publications

References 1 publication

A Study of Clinostomum (Trematode) and Contracaecum (Nematode) Parasites Affecting Oreochromis Niloticus in Small Abaya Lake, Silite Zone, Ethiopia

A Study of Clinostomum (Trematode) and Contracaecum (Nematode) Parasites Affecting Oreochromis Niloticus in Small Abaya Lake, Silite Zone, Ethiopia

The Digenean <i>Clinostomum complanatum</i> Found from Great Cormorant <i>Phalacrocorax carbo</i> in Japan

A Human Case of Clinostomum complanatum Infection in Korea

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