Seasonal population dynamics of the monogeneans Quadriacanthus kobinensis parasitising Clarias fuscus in Pearl River, China
and | Mar 10, 2016
About this article
Article Category: Research Note
Published Online: Mar 10, 2016
Page range: 105 - 108
Received: Mar 24, 2015
Accepted: Sep 07, 2015
DOI: https://doi.org/10.1515/helmin-2015-0070
Keywords
© 2016 Institute of Parasitology, SAS, Košice
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
The seasonal frequency distribution indices of Q. kobinensis in host
| Frequency indices | |||||
|---|---|---|---|---|---|
| No. of | Spring | Summer | Autumn | Winter | |
| 0 | 38.71 | 29.87 | 46.74 | 39.51 | |
| 1 – 4 | 31.18 | 27.27 | 19.57 | 14.81 | |
| 5 – 8 | 7.53 | 6.49 | 4.35 | 8.64 | |
| 9 – 12 | 3.23 | 6.49 | 4.35 | 3.70 | |
| 13 – 16 | 6.45 | 3.90 | 3.26 | 6.17 | |
| 17 – 20 | 3.23 | 1.30 | 1.09 | 4.94 | |
| >20 | 9.68 | 24.68 | 20.65 | 22.22 | |
Infection indices of Q. kobinensis in Clarias fuscus during different seasons in Pearl River, China
| mean water temp. (°C) | No. of fish sampled | Length of fish (Mean ± SE) (cm) | Prevalence (%) | No. of parasites | Mean Intensity (SE) Max | Abundance(SE) |
|---|---|---|---|---|---|---|
| Spring 19.8 | 91 | 22.1 ± 0.3 | 62.64 | 661 | 11.6(2.1)69 | 7.3(1.4) |
| 13.0 – 30.0 | ||||||
| Summer 30.7 | 77 | 23.2 ± 0.4 | 70.13 | 1984 | 36.7 (7.7) | 221 25.8 (5.7) |
| 15.1 – 31.9 | ||||||
| Autumn 24.4 | 92 | 22.9 ± 0.5 | 53.26 | 2115 | 43.2 (11.7) | 474 23.0 (6.6) |
| 13.7 – 32.5 | ||||||
| Winter 15.6 | 81 | 22.3 ± 0.3 | 60.49 | 1281 | 26.1 (5.9) 265 | 15.8 (3.8) |
| 14.6 – 29.8 |
The seasonal fluctuation of aggregation indices of Q. kobinensis in host
| Infection intensity | ||||||
|---|---|---|---|---|---|---|
| Spring | 0 – 69 | 189.69 | 26.13 | 0.29 | 32.39 | 4.42 |
| Summer | 0 – 221 | 2512.97 | 97.52 | 0.27 | 122.29 | 4.70 |
| Autumn | 0 – 474 | 3999.04 | 173.95 | 0.13 | 195.94 | 8.45 |
| Winter | 0 – 265 | 1192.03 | 75.40 | 0.21 | 90.21 | 5.65 |