We also assume that the oncomiracidia may possibly migrate to the gills from the body surface.
The fishery has been sampled continuously since 1970, using gill nets, seine nets, traps and electric fishing as appropriate to season and conditions.
This final segregation was more apparent in the second and third gill arches.
The left side of the gill apparatus was investigated for parasite distribution.
Each gill arch was examined and the number of metacercarial cysts counted.
Several explanations have been proposed to explain the transverse partitioning distribution of gill ectoparasites.
The niches of both congeners were greatly segregated and a low overlap was found within all gill arches.
On the gills of all the catfish examined there occurred a leech which was sometimes present in enormous numbers.
The sunfish were revived by irrigating the gills with fresh aquarium water.
Oysters were later dissected on ice, determining the wet weight of gills, digestive gland and all remaining tissues.
The gills were removed and rinsed, and the arches were examined individually.
Dactylogyrid species were found to co-occur on the gills of roach with up to six species found on the same host individual.
A number of parasites was found on the gills and corpus.
The four gills of one body side represented 96 sections, with 24 sections per gill arch.
Dissections of 11 rays treated as described above were done to ensure that all parasites from the gills and nasal tissues were removed.
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