Prevalence of <i>Genarchopsis dasus</i> (Digenea: Hemiuridae) in <i>Channa punctatus</i> of Mymensingh

Abstract

An investigation was made on prevalence of the parasite Genarchopsis dasus in the fish Channa punctatus of Mymensingh, Bangladesh to determine the infestation and seasonal variation. The experiment was carried out from December 2009 to November 2010. A total of 379 parasites were collected from 235 host fish. The prevalence of G. dasus was higher in July and lower in September and October. The highest prevalence (83.3%) was in rainy season and the lowest (45.5%) in autumn. The highest intensity of G. dasus was in July and the lowest in December, and the highest and lowest intensity was in rainy and winter seasons, respectively. The prevalence was highest in intermediate length fish (67.0%), where the lowest (54.9%) was in small fish. Intensity was highest in intermediate length fish. The higher prevalence (90%) and intensity (4.3) was in female during rainy season. The lower prevalence (32%) and mean intensity (1.1) was in male during autumn. The highest ratio of mature: immature was in summer (30 : 37), the highest percentage of mature worms was in summer and the highest proportion of immature worms in autumn. The stomach contained most worms (72.8%) and the lowest proportion (6.6%) was in anterior portion of intestine. (Bangl. vet.

Prevalence of Parasitic Infestations in the Freshwater Fish, Channa punctatus (Bloch) from Rajshahi Metropolitan, Bangladesh

“…The prevalence of L. bata and Dactylogyrus vastator were found in the skin and gill of host which were also observed as a common parasite of C. striatus (Banu et al, 1993). Chandra et al, (2011) noticed that Genarchopsis dasus was located in the intestine and stomach of Channa punctatus. Alam et al, (2010) observed that Genarchopsis bangladensis was located in intestine of Channa punctatus.…”

Study on infestations and biodiversity of metazoan parasites in Channa punctatus (Bloch), Mymensingh region

“…Both prevalence and intensity were higher in rainy season and lower in winter. Similarly Chandra et al (2011) observed the highest prevalence (83.30%) was in rainy season and the lowest (45.50%) in autumn season of Genarchopsis dasus. It might be the fact that different groups of parasite may show maximum infestation in different time of the year.…”

“…During the investigation the intensity of infestation of Channa punctatus were higher in small length class group. Chandra (1984) stated that digenetic trematode Euclinostomum multicaecum infested the intermediate length group (in between 14-16 cm) of Channa punctatus more than that of smaller and larger length group of fishes. Dogiel (1964) reported that the prevalence and intensity of infestations is increased with the age of fish hosts.…”

Intensity and Prevalence of Helminth Parasites in Caranx leptolepisfrom Karangantu and Labuan

“…Selain mengakibatkan kematian, infeksi parasit juga menyebabkan penurunan tingkat fekunditas, mempengaruhi perkembangan benih ikan (Indaryanto 2014). Chandra et al (2011) menyatakan infeksi cacing parasitik pada ikan terjadi akibat ketidak serasian antara tiga komponen utama penyebab penyakit, yaitu ikan sebagai inang, lingkungan perairan dan cacing parasitik itu sendiri. Studi komunitas cacing parasitik ikan menunjukkan bahwa interaksi dari faktor ekstrinsik (habitat host) seperti karakteristik lingkungan inang dan faktor-faktor intrinsik (biologi host) seperti ukuran tubuh atau jenis kelamin, memainkan peran yang penting.…”