Infection level of the Asian tapeworm (Bothriocephalus acheilognathi) in the cyprinid fish, Schizothorax niger, from Anchar Lake, relative to season, sex, length and condition factor

• Published in: Parasitology research (1987) Vol. 110; no. 1; pp. 427 - 435
• Main Authors: Zargar, Ummer Rashid, Chishti, M. Z., Yousuf, A. R., Ahmed, Fayaz
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer-Verlag 2012; Springer
• Subjects: Agnatha. Pisces; Animals; Biological and medical sciences; Biomedical and Life Sciences; Biomedicine; Body Size; Body Weight; Bothriocephalus acheilognathi; Cestoda; Cestoda - isolation & purification; Cestode Infections - epidemiology; Cestode Infections - parasitology; Cestode Infections - veterinary; Cyprinidae; Cyprinidae - anatomy & histology; Cyprinidae - parasitology; Diphyllobothrium; Female; Fish Diseases - epidemiology; Fish Diseases - parasitology; Fresh Water; Freshwater; Fundamental and applied biological sciences. Psychology; General aspects; General aspects and techniques. Study of several systematic groups. Models; Health aspects; Host-parasite relationships; Immunology; Invertebrates; Male; Medical Microbiology; Microbiology; Nemathelminthia. Plathelmintha; Original Paper; Parasite Load; Physiological aspects; Prevalence; Schizothorax niger; Seasons; Sex Factors; Statistics as Topic; Vertebrates: general zoology, morphology, phylogeny, systematics, cytogenetics, geographical distribution; Niger; Africa; India; Pakistan, Kashmir; Grass Carp; Significant Positive Trend; Intermediate Host; Condition Factor; Seasonal Dynamic; Freshwater environment; Infection; Vertebrata; Pisces; Sex; Helmintha; Lakes; Parasite; Plathelmintha; Cyprinidae; Invertebrata
• ISSN: 0932-0113; 1432-1955
• DOI: 10.1007/s00436-011-2508-z

Various studies have shown that the Asian fish tapeworm, Bothriocephalus acheilognathi causes great economic loss in hatcheries, fish farms as well as in lakes. In order to understand the seasonal variation of infection in a nutrient-enriched lake, parasitological investigation was carried out in the indigenous cyprinid fish, Schizothorax niger Heckel 1838 from September, 2008 to August, 2009. Overall, this study revealed definite seasonality of infection ( p  < 0.05), with greater infection in summer (prevalence = 39.5%) and lesser in winter (prevalence = 8.1%). The prevalence among different seasons revealed significant differences ( p  < 0.05). Sex was not an important factor influencing the prevalence of the Asian tapeworm. A strong positive correlation (Pearson’s correlation, r  = 0.7; p  = 0.02) between total length of S. niger and number of Asian fish tapeworms was observed. Similarly, a strong positive correlation existed between weight of fish and number of tapeworms (Pearson’s correlation, r  = 0.7; p  = 0.005). Prevalence and mean abundance were positively and significantly correlated with water temperature ( r  = 0.8, p  < 0.01 and r  = 0.8, p  < 0.01, respectively). Thus seasonal dynamics, total length and weight of the host significantly influenced the tapeworm infection. The above findings will be useful in devising the appropriate control strategies for the Asian tapeworm in wild fish in Kashmir valley as well as in similar climatic zones of other parts of the world. Also, information from this study will be used to assess the spread and extent of B. acheilognathi which is a potential threat to the indigenous fish fauna of Anchar Lake.