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.

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.

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.

scholarly journals Spatial and temporal distributions of the sponge fauna insouthern Italian lagoon systems

2015 ◽  
Vol 17 (1) ◽  
pp. 174 ◽  
Author(s):  
C. LONGO ◽  
F. CARDONE ◽  
M. MERCURIO ◽  
C. NONNIS MARZANO ◽  
C. PIERRI ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Species Richness ◽  
Southern Italy ◽  
Taxonomic Composition ◽  
Single Site ◽  
Spatial Distributions ◽  
Anthropogenic Pressures ◽  
Spatial And Temporal Distributions ◽  
Lagoon Systems

The present work focused on the taxonomic composition, spatial distributions, and temporal distributions of the sponge fauna from the main lagoon systems of southern Italy: Lesina, Varano, Taranto, Alimini, Faro, Ganzirri, Tindari and Marsala. Overall, 62 sponge species were recorded, belonging to the classes Demospongiae (52 species), Calcarea (8) and Homoscleromorpha (2). All the lagoon systems studied hosted sponges, even if with marked differences. Species richness varied from one (Lesina) to 45 (Marsala). A large number of the species recorded during this study (52%) was found only at a single site, whereas a species only (Halichondria (H.) panicea) was present in all the environments studied. Sponges colonised all available substrates. Salinity was the ecological factort hat best explained the spatial distribution of sponges, even though the wide heterogeneity of sponge assemblages, strongly suggests an important role of stochastic factors acting on pre- and post-settlement phases. Comparison of the present data with lists available from the literature shows that sponge assemblages from most of the studied lagoons were quite persistent. However, in some of the lagoons remarkable extinction processes, probably related to massive and prolonged anthropogenic pressures, have contributed to large changes in the sponge patterns.

scholarly journals Record of Copepod Parasite (Pennellidae) in Buccal Cavity and Gill Arch of Cultured Groupers, Epinephelus spp. in Batam, Indonesia

2021 ◽  
Vol 34 (4) ◽  
Author(s):  
ENDANG WIJAYANTI ◽  
◽  
INDAH ISTIQOMAH ◽  
MURWANTOKO MURWANTOKO
Keyword(s):  
Dna Sequences ◽  
Phylogenetic Trees ◽  
Buccal Cavity ◽  
Gill Arch ◽  
Group Method ◽  
Local Alignment ◽  
Cox1 Gene ◽  
Copepod Parasite ◽  
Adult Copepod ◽  
Hybrid Grouper

The crustacean parasites are the most frequently encountered and cause significant economic loss in mariculture. These parasites infect fish fin, skin, gills, and buccal cavity. This study aims to describe copepod parasite in the buccal cavity of cultured groupers, Epinephelus spp., from Batam waters using morphological and molecular biology approaches. The tiger grouper, Epinephelus fuscoguttatus (Forsskal, 1775), and hybrid grouper, Epinephelus sp. showing lethargy and skin darkening were collected from sea cages. The parasite’s morphology was observed using light and scanning electron microscopes. The genomic DNA was isolated from the parasites and used as a template for amplification of cytochrome oxidase subunit-1 (Cox1) gene and followed by sequencing. The fish exhibited red nodules in the mouth cavity, on the lips, and gill arch in varying numbers and size of nodules. The copepodid, chalimus, and adult copepod stages were found from the nodule. Based on the presence of the oral cone, this parasite belonged to Siphonostomatoida order of copepods. Based on the structure of the caudal ramus with four long and four short setae, the first and second pair legs as biramous, and the third pair leg as uniramous, this parasite belonged to Pennellidae family of copepods. Basic local alignment search tool analysis of this Cox1 showed low homology within 80%, indicating that the DNA sequences of the parasite species were not reported in the GenBank. The unweighted pair group method using arithmetic average phylogenetic trees supported that this parasite belonged to the family Pennellidae. This is the first report on the pennellid parasite infection in the buccal cavity and gill arch of cultured groupers in Batam, Indonesia.

The biology of Atrispinum labracis n. comb. (Monogenea) on the gills of the bass, Dicentrarchus labrax

1983 ◽  
Vol 63 (4) ◽  
pp. 915-927 ◽  
Author(s):  
Judith Winch
Keyword(s):  
Dicentrarchus Labrax ◽  
Sea Bass ◽  
The Body ◽  
Gill Arch ◽  
Intensity Of Infection ◽  
Copulatory Apparatus ◽  
Open Sea ◽  
Mating Opportunities ◽  
Low Prevalence

Atrispinum labracis (Van Beneden & Hesse) n.comb. syn. Microcotyle labracis Van Beneden & Hesse, 1863, parasitizes the bass Dicentrarchus labrax but almost only in the open sea; the very low prevalence of parasites on juvenile estuarine hosts was not due to intolerance of lower salinities in this habitat. The intensity of infection on open-sea bass was rarely more than 2 per fish but the strict localization of the habitat to the outer hemibranch of the ventral end of the first gill arch is thought to enhance the mating opportunities. The parasite attaches itself asymmetrically to the gill by a permanent morphological inclination of the body with respect to the haptor which is itself symmetrically aligned on a single primary lamella.Substantial differences between the copulatory apparatus of A. labracis and that of Microcotyle donavini Van Beneden & Hesse, 1863, the type of Microcotyle, have made necessary the transfer of the parasite from Dicentrarchus labrax to Atrispinum Maillard & Noisy, 1979 and a consequent amendment to the diagnosis of the subfamily Atriasterinae Maillard & Noisy, 1979.

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).

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