Monogeneans on exotic Indian freshwater fish. 7. Results of a national study on ornamental fishes from 2019–2022

Special Issue – Ninth International Symposium on Monogenea. Invited Editors: Amit Tripathi, Nirupama Agarwal & Jean-Lou Justine

Open Access

Table 5

Infection parameters of monogenean parasites from exotic Indian freshwater fish collected in 2019–2022. At least ten fish were examined for each species.

Fish hosts	NE	Parasite species	NI	NM	P (%)	MI
1. Scatophagus argus	15	Metahaliotrema mizellei	3	12	20	4
2. Betta splendens	10	Heteronchocleidus sp.	4	8	40	2
3. Helostoma temminckii	20	Trianchoratus acleithrium	3	8	15	2.6
4. Osphronemus goramy	22	–	0	0	0	0
5. Trichopodus trichopterus	26	Trianchoratus trichogasterium	10	85	38.46	8.5
6. Gymnocorymbus ternetzi	25	Diaphorocleidus armillatus	25	860	100	34.4
7. Hemigrammus erythrozonus	15	–	0	0	0	0
8. Metynnis hypsauchen	20	Mymarothecium sp.	5	38	25	7.6
9. Piaractus brachypomus	24	Mymarothecium viatorum	24	720	100	30
10. Astronotus ocellatus	12	Gussevia asota	12	600	100	50
11. Chindongo socolofi	22	Cichlidogyrus tilapiae	5	31	22.72	6.2
12. Hemichromis fasciatus	15	–	0	0	0	0
13. Mikrogeophagus ramirezi	23	–	0	0	0	0
14. Pterophyllum scalare	10	Sciadicleithrum iphthimum	4	12	33.33	3
15. Thorichthys meeki	18	–	0	0	0	0
16. Barbonymus altus	28	Dactylogyrus lampam	28	468	100	16.7
17. Carassius auratus	63¹	Dactylogyrus anchoratus	46	292	73	6.3
		Dactylogyrus baueri	20	80	31.7	4
		Dactylogyrus extensus	20	180	31.7	9
		Dactylogyrus formosus	40	220	63.4	5.5
		Dactylogyrus intermedius	30	300	47.6	10
		Dactylogyrus minutus	15	50	23.8	3.3
		Dactylogyrus vastator	58	636	92	10.9
		Gyrodactylus gurleyi	12	64	33.3	5.3
		Gyrodactylus kobayashii	9	56	14.28	6.2
18. Cyprinus carpio	35	Dactylogyrus anchoratus	20	140	57.14	7
		Dactylogyrus extensus	8	280	22.85	35
		Dactylogyrus minutus	15	180	100	12
		Dactylogyrus vastator	20	240	57.14	12
		Gyrodactylus sprostonae	04	25	22.85	6.25
		Gyrodactylus sp.1	06	15	34.28	2.5
19. Epalzeorhynchos frenatum	22	–	0	0	0	0
20. Pethia conchonius	15	–	0	0	0	0
21. Puntigrus tetrazona	15	Dactylogyrus volfi	4	8	26.66	4
22. Poecilia latipinna	25	–	0	0	0	0
23. Poecilia reticulata	30	Gyrodactylus bullatarudis	2	6	6.6	3
24. Poecilia sphenops	25	–	0	0	0	0
25. Xiphophorus hellerii	27	Urocleidoides sp.	3	10	11.11	3.3
26. Xiphophorus maculatus	40	–	0	0	0	0
27. Pterygoplichthys disjunctivus	17	Heteropriapulus heterotylus	10	48	58.82	4.8
Total	619		240	5672

NE is the number of fish examined; NI is the number of fish infected; NM is the number of monogenean parasites recovered; P is the prevalence in percentage; MI is the mean intensity.

All C. auratus sampled were found to be infected with one or another species of monogenean parasites.

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