Seasonal dynamics and spatial distribution of Cleidodiscus stentor Mueller 1937 and Ergasilus centrarchidarum Wright 1882, gill parasites of Ambloplites rupestris (Raf.)

1978 ◽  
Vol 56 (6) ◽  
pp. 1244-1246 ◽  
Author(s):  
George Hanek ◽  
C. H. Fernando
Keyword(s):  
Spatial Distribution ◽  
Seasonal Dynamics ◽  
Gill Arch ◽  
West Lake ◽  
Clear Preference ◽  
Anterior Side ◽  
Gill Parasites ◽  
Ambloplites Rupestris

Seasonal dynamics and spatial distribution were determined for Cleidodiscus stentor Mueller 1937 and Ergasilus centrarchidarum Wright 1822, gill parasites of Ambloplites rupestris (Raf.).Twenty-five specimens of A. rupestris from eutrophic (West Lake) and 25 specimens from oligotrophic (Glenora) habitats were examined monthly between November 1971 and October 1972.The data were analysed using a two-factor ANOVA and Duncan's multiple range test.High abundance levels of C. stentor and E. centrarchidarum were recorded in the two localities throughout the sampling period.Cleidodiscus stentor, the dominant parasite of A. rupestris in West Lake, reached the peak during March 1972 in West Lake and during April 1972 in Glenora. Ergasilus centrarchidarum, the dominant parasite of A. rupestris in Glenora, reached the peak during August 1972 in both localities.The anterior side of hemibranchs, their medial sections, and gill arch two were preferred sites of infection (P < 0.001) for C. stentor.Ergasilus centrarchidarum exhibited clear preference (P < 0.001) for anterior sides of hemibranchs and their dorsal and ventral sections, while its distribution over the four gill arches was fairly even.

Seasonal dynamics and spatial distribution of Urocleidus ferox Mueller 1934, a gill parasite of Lepomis gibbosus (L.)

1978 ◽  
Vol 56 (6) ◽  
pp. 1241-1243 ◽  
Author(s):  
George Hanek ◽  
C. H. Fernando
Keyword(s):  
Spatial Distribution ◽  
Seasonal Dynamics ◽  
Sampling Period ◽  
Lepomis Gibbosus ◽  
West Lake ◽  
Gill Parasite ◽  
Anterior Side

Seasonal dynamics and spatial distribution were determined for Urocleidus ferox Mueller 1934, a gill parasite of Lepomis gibbosus (L.). Twenty-five specimens of L. gibbosus from eutrophic (West Lake) and 25 specimens from oligotrophic (Glenora) habitats were examined monthly between November 1971 and October 1972.The data were analysed using a two-factor ANOVA and Duncan's multiple range test.High abundance levels of U. ferox were recorded in both localities throughout the sampling period. The peak was reached in July 1972 and the lowest levels recorded in November 1971 in both localities. The eutrophic habitat, West Lake, was significantly (P < 0.001) more favourable for U. ferox than the oligotrophic one, viz. Glenora.The anterior side of hemibranchs and their medial sections were preferred sites of infection (P < 0.001); gill arches two and three were found to be preferred sites of infection (P < 0.001) for U. ferox.

Spatial distribution of the copepod parasite Lernanthropus kroyeri on the gills of bass, Dicentrarchus labrax (L.)

1980 ◽  
Vol 60 (4) ◽  
pp. 1061-1067 ◽  
Author(s):  
J. T. Davey
Keyword(s):  
Spatial Distribution ◽  
Dicentrarchus Labrax ◽  
Gill Arch ◽  
Single Site ◽  
Copepod Parasite ◽  
Gill Parasites ◽  
External Face

Young estuarine bass of the 1976 and 1977 year classes were examined for gill parasites between February 1978 and June 1979. 344 specimens of the copepod Lernanthropus kroyeri were recovered from 177 of 289 fish. The distribution of the copepods on the gills showed clear preferences for site of attachment. With 48 such sites delineated per fish, 143 of 183 female copepods favoured a single site – the internal face of the medial sector of the posterior hemibranch of the second gill arch. 57 of 161 male copepods chose attachment to the external face of the medial sector of the anterior hemibranch of the second gill arch. Only seven copepods in all were found attached at any of the twelve possible sites on the first gill arch, and none at all at the six possible sites on the posterior hemibranch of the fourth gill arch. Explanations for the observed distribution are discussed in terms of the strength of the branchial ventilation currents over the different gills coupled with observations on the special respiratory adaptations of these parasites.

The role of season, habitat, host age, and sex on gill parasites of Ambloplites rupestris (Raf.)

1978 ◽  
Vol 56 (6) ◽  
pp. 1251-1253 ◽  
Author(s):  
George Hanek ◽  
C. H. Fernando
Keyword(s):  
Sampling Period ◽  
Parasite Load ◽  
Seasonal Effect ◽  
Host Age ◽  
West Lake ◽  
Prince Edward County ◽  
Gill Parasites ◽  
Ambloplites Rupestris ◽  
Age And Sex

One thousand and forty-five rock bass (Ambloplites rupestis (Raf.)) were collected from May 1970 through October 1972 from the Bay of Quinte, Ontario. During the same sampling period, 1043 specimens of the same host were collected from West Lake, Prince Edward County, Ontario.Data were collected on three groups of gill parasites, Monogenea (four species), Copepoda (three species), and glochidia (one species). The data, treated synecologically, were analysed using a two-factor ANOVA and Duncan's multiple range test. The roles of season, habitat, host age, and sex on parasite load were analysed.Host sex was found to have no effect on the three groups of parasites. The abundance of parasites increased with host age (P < 0.001). A marked seasonal effect was noted for all three groups of parasites (P < 0.001). A eutrophic habitat, West Lake, was found significantly more favourable (P < 0.001) for Monogenea, while an oligotrophic habitat, Glenora, was clearly more favourable (P < 0.001) for Copepoda.

Spatial distribution of gill parasites of Lepomis gibbosus (L.) and Ambloplites rupestris (Raf.)

1978 ◽  
Vol 56 (6) ◽  
pp. 1235-1240 ◽  
Author(s):  
George Hanek ◽  
C. H. Fernando
Keyword(s):  
Spatial Distribution ◽  
Distribution Patterns ◽  
Lepomis Gibbosus ◽  
Significant Preference ◽  
Spatial Distribution Patterns ◽  
Gill Parasites ◽  
Ambloplites Rupestris

Precise positions with regard to gill arches, sides of gill hemibranchs (anterior or posterior), and their sections (dorsal, medial, ventral) were recorded on 25 specimens monthly to determine spatial distribution of gill parasites of Lepomis gibbosus (L.) and Ambloplites rupestris (Raf.). Data were collected on three groups of parasites, Monogenea, Copepoda, and glochidia. The data, treated synecologically, were analysed for spatial distribution using a two-factor ANOVA and Duncan's multiple range test.A significant preference for anterior sides of hemibranchs was noted for Monogenea and glochidia of L. gibbosus (P < 0.001). A definite affinity for anterior medial and posterior medial sections of hemibranchs was noted for Monogenea and glochidia of L. gibbosus (P < 0.001), while Copepoda of the same host were found most often on either anterior or posterior sections of hemibranchs (P < 0.001).A well-defined preference for gill arches, in descending order, two, three, one, and four was noted for Monogenea and glochidia of L. gibbosus (P < 0.001), while no such preference was found for Copepoda of the same host (P < 0.001). The spatial distribution patterns exhibited by the three groups of parasites of Ambloplites rupestris followed generally the same patterns as those exhibited by the gill parasites of L. gibbosus, the only exception being the preference for anterior sides of hemibranchs exhibited by Copepoda (P < 0.001).

scholarly journals Microecology of Monogenean Gill Parasites of Tilapia Rendalli Boulenger, 1897 From Bamendjing Lake, Cameroon

2017 ◽  
Vol 8 (1) ◽  
pp. 43
Author(s):  
TOMBI Jeannette ◽  
TCHIEGNO Joëlle Miriane ◽  
AKOUMBA John Francis
Keyword(s):  
Spatial Distribution ◽  
Water Flow ◽  
Parasite Species ◽  
Host Population ◽  
Gill Arch ◽  
Site Preference ◽  
Mate Finding ◽  
Gill Net ◽  
Tilapia Rendalli ◽  
Gill Parasites

The present work aimed to study preferences for microhabitat by the monogenean gill parasites of Tilapia rendalli Boulenger, 1897. Fifty-four specimens were sampled using gill net in February 2014 at Bamendjing Lake. Each gill arch was removed and examined to both quantify the number of parasites and their distribution on the gills. This examination enabled us to find 6583 specimens of monogeneans belonging to 5 different species, Cichlidogyrus arthracanthus, C. dossoui, C. quaestio, C. tiberianus and C. tilapiae with 3708, 1708, 858, 210 and 99 individuals respectively. All species were aggregated within the host population. The spatial distribution of each parasite species was studied on different partitions of the gill arches. This study supports the hypothesis that gill site preference is a result of water flow over gills during respiration and mate finding habitat. There was no evidence of competition among the various species.

Spatial Distribution and Seasonal Dynamics of the Chlorophyll a Concentration in the Sea of Azov Based on MERIS Images

Oceanology ◽  
2018 ◽  
Vol 58 (5) ◽  
pp. 689-699 ◽  
Author(s):  
V. V. Saprygin ◽  
S. V. Berdnikov ◽  
V. V. Kulygin ◽  
L. V. Dashkevich ◽  
L. M. Mestetskiy
Keyword(s):  
Spatial Distribution ◽  
Chlorophyll A ◽  
Seasonal Dynamics ◽  
Sea Of Azov ◽  
Chlorophyll A Concentration ◽  
The Sea Of Azov

The role of season, habitat, host age, and sex on gill parasites of Lepomis gibbosus (L.)

1978 ◽  
Vol 56 (6) ◽  
pp. 1247-1250 ◽  
Author(s):  
George Hanek ◽  
C. H. Fernando
Keyword(s):  
Sampling Period ◽  
Parasite Load ◽  
Seasonal Effect ◽  
Lepomis Gibbosus ◽  
Host Age ◽  
West Lake ◽  
Prince Edward County ◽  
Host Sex ◽  
Gill Parasites ◽  
Age And Sex

One thousand and forty pumpkinseeds (Lepomis gibbosus (L.)) were collected from May 1970 through October 1972 from the Bay of Quinte, Ontario. Also, 1018 specimens of the same host were collected during the same sampling period from West Lake, Prince Edward County, Ontario.Data were collected on three groups of gill parasites, Monogenea (seven species), Copepoda (three species), and glochidia (one species). The data, treated synecologically, were analysed using a two-factor ANOVA and Duncan's multiple range test. The roles of season, habitat, host age, and sex on parasite load were analysed. Host sex was found to have no effect on the three groups of parasites. The abundance of parasites increased with host age (P < 0.001). A marked seasonal effect was noted for all three groups of parasites (P < 0.001), all three being most abundant during the summer period. A eutrophic habitat, West Lake, was found significantly more favourable (P < 0.001) for all three parasitic groups.

scholarly journals Spatial distribution and seasonal dynamics of non-biting moth flies (Diptera, Psychodidae) in confound conditions of a stable

2020 ◽  
Vol 89 (4 - Ahead of print) ◽  
pp. 190-199
Author(s):  
Marek Semelbauer ◽  
Jozef Oboňa ◽  
Marek Barta ◽  
Barbara Mangová ◽  
Milan Kozánek
Keyword(s):  
Organic Matter ◽  
Spatial Distribution ◽  
High Temperature ◽  
Seasonal Dynamics ◽  
Life Style ◽  
Flight Period ◽  
Internal Wall ◽  
Biting Midges ◽  
Malaise Traps

Many small Diptera adopted at some level endophilic life style, including man-made buildings. Stables create a specific type of microhabitat, which provides shady and relatively humid conditions in combination with excess of organic matter. Unlike the parasites (mosquitos, biting midges, etc.), the commensal fauna of stables is poorly studied. Moth flies (Psychodidae) were collected in cow stable located in Šenkvice, SW Slovakia. Special traps (derived from Malaise traps) were installed along the stable internal wall and in three different heights. In total, we recorded 6325 moth flies belonging to 8 species. The flight period lasted from spring to autumn. Seasonal dynamics was strongly influenced by rainfall and mean week temperature, e.g. high temperature in mid-summer caused drop in moth flies captures. The moth flies clearly preferred the ground and moderately preferred the interior of stable.

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