Effect of temperature on the prevalence of different parasites in Cirrhinus mrigala Hamilton of West Bengal

Abstract

A study has been done to find out the prevalence of different kinds of parasites in Cirrhinus mrigala (Hamilton 1822) during 2010-2011. It has been found that the temperature variation affects some parasitic infestation over the fish species. It was found that ciliophoran and crustacean parasites are more prevalent from November to February whereas the myxozoan and monogenean parasites are more prevalent from January to April. Considering temperature variation throughout the year it has been inferred that most of the parasitic infections were found between November and April when the temperature range varies from 19 to 26°C. So from the study it can be concluded that lower temperature elicits the parasitic growth in fishes while the higher temperature retards the growth.

New Data on Trichodinid Ectoparasites (Ciliophora: Peritrichida) of Mullus barbatus ponticus (Mullidae) in the Black Sea

“…In this study, we noted that while no trichodinid recorded in summer and autumn season, the highest prevalence and mean intensity level of trichodinids are recorded in spring, which corresponds to the multiplication season for trichodinids (Table 2). Similarly, Majumder et al (2015) determined a decrease in infection prevalence of trichodinids in the fishes in summer and autumn seasons similar to our data. This can probably happen because that the high temperatures of water detected in summer and autumn seasons (Table 3) prevents the proliferation of trichodinids.…”

Seasonal pattern in parasite infracommunities of Hoplerythrinus unitaeniatus and Hoplias malabaricus (Actinopterygii: Erythrinidae) from the Brazilian Amazon

“…However, for both host species, 11 parasite species were common, and I. multifiliis was the dominant species. Ichthyophthirius multifiliis is an ectoparasite species with direct life cycle and great capacity for reproduction in eutrophic environments (Neves et al 2013;Tavares-Dias et al 2014;Majumder et al 2015), such as the environment of the present study. The quantity of rainfall may have a great effect on aquatic ecosystems, resulting in changes to fish habitat and water velocity, which may influence fish life and therefore may affect the composition of the parasite communities and intermediate hosts.…”

“…Therefore, parasite assemblages could also play a potential role as environmental indicators by decreasing or increasing in their diversity, species richness, abundance and prevalence with the changes to environmental conditions (Kadlec et al 2003;Tavares-Dias et al 2014;Alcântara and Tavares-Dias 2015). In wild fish populations, the endoparasite community structuring is related to host behavior, position in the food chain, seasonal availability of infecting forms in the environment and environmental conditions (Kadlec et al 2003;Violante-González et al 2008;Soylu 2013;Neves et al 2013;Tavares-Dias et al 2014;Majumder et al 2015). Therefore, the similar lifestyles of H. malabaricus and H. unitaeniatus and their carnivorous habits, feeding on fish, crustaceans (Santos et al 2006;Soares et al 2011;Alcântara and Tavares-Dias 2015) and mollusks, contributed towards the elevated richness of endoparasites, which are transmitted trophically.…”

The Spatial Distribution of Perch (Perca fluviatilis) Ectoparasites and the Effect of Chemical Water Quality Parameters on Ectoparasite Spatial Niche Size

“…Abiotic factors are physicochemical components (temperature, pH, light intensity, salinity), whereas biotic factors are usually associated with the host (age, sex, length, immune response) (Dogel, 1962;Poulin, 2004;Morand and Krasnov, 2010). Seasonal changes of abiotic factors and their influence on parasite occurrence have been the focus of many ecological studies (Öztürk and Altunel, 2006;Lamková et al, 2007;Khidr et al, 2012;Majumder et al, 2013;Wali et al, 2016). For example, prevalence and intensity of parasitic infection have been evaluated considering several parameters of water quality (temperature, dissolved oxygen, free CO 2 , alkalinity, hardness, clarity) and water pollutants (heavy metals, petrochemicals, effluents, organic pollutants) (Siddall et al, 1997;Yeomans et al, 1997;Faulkner and Lochmiller, 2000;Lefcort et al, 2002;Billiard and Khan, 2003).…”