Research Article

The occurrence of Pomphorhynchus laevis (Acanthocephala) in cagereared rainbow trout (Oncorhynchus mykiss) from Işıklı Spring, Çivril, Turkey

Volume: 34 Number: 3 September 26, 2017
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The occurrence of Pomphorhynchus laevis (Acanthocephala) in cagereared rainbow trout (Oncorhynchus mykiss) from Işıklı Spring, Çivril, Turkey

Abstract

Occurrence of Pomphorhynchus laevis (Müller, 1776) in cage-reared rainbow trout Oncorhynchus mykiss (Walbaum, 1792) and the effects of parasitism on the fish condition were studied between July and November 2014 in Işıklı Spring. A total of 221 O. mykiss specimens were examined. In addition to P. laevis, three other parasite species; Trichodina sp., Ichthyophthirius multifiliis Fouquet, 1876 and Diplostomum sp. were also recorded. P. laevis was numerically the predominant species with the highest prevalence (77.8%), mean intensity (6.74), and mean abundance (5.24). In total 1160 P. laevis specimens were collected. The mean abundance of P. laevis increased over a period of months from 2.5 individual parasites per fish in July to 7.1 in November. The mean intensity of P. laevis increased with increasing fish host length from 1.5 in the 5.0–6.9 cm length class to 18.4 in the 25.0–26.9 cm length class. Although there was no statistically significant bias in the spatial distribution of P. laevis within the gut (p ˃ 0.05), the parasite tended to prefer the pyloric caeca (47.9%). The larval stage (cystacanth) of the acanthocephalan parasite were obtained from the haemocoel of Gammarus obnixus Karaman and Pinkster, 1977. The value of Fulton’s condition factor (K) ranged from 0.84 to 1.66.

Keywords

References

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Details

Primary Language

English

Subjects

-

Journal Section

Research Article

Publication Date

September 26, 2017

Submission Date

January 5, 2017

Acceptance Date

April 17, 2017

Published in Issue

Year 2017 Volume: 34 Number: 3

APA
Sözeren Çevrimel, D., & Soylu, E. (2017). The occurrence of Pomphorhynchus laevis (Acanthocephala) in cagereared rainbow trout (Oncorhynchus mykiss) from Işıklı Spring, Çivril, Turkey. Ege Journal of Fisheries and Aquatic Sciences, 34(3), 255-260. https://doi.org/10.12714/egejfas.2017.34.3.02

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