Utilization of alien freshwater fishes by the parasitic copepod Neoergasilus japonicus (Ergasilidae) on Okinawa-jima Island, Japan, with a list of its known hosts

Zoosymposia ◽  
2012 ◽  
Vol 8 (1) ◽  
pp. 81-96
Author(s):  
KAZUYA NAGASAWA ◽  
DAISUKE UYENO
Keyword(s):  
Lepomis Macrochirus ◽  
Freshwater Fishes ◽  
Parasitic Copepod ◽  
Fish Parasites ◽  
Tilapia Zillii ◽  
Sampling Locations ◽  
Neoergasilus Japonicus ◽  
Specific Species ◽  
Host Parasite ◽  
Alien Parasite

Currently, many fish parasites have been dispersed worldwide via the movement of fishes for food, sport, or the aquarium trade. The freshwater parasitic copepod Neoergasilus japonicus (Harada, 1930) is such an example: it is native to eastern Asia, but has been introduced to southern Asia, Europe, and North America. Since N. japonicus has been regarded as an important alien parasite in such regions, more information is needed on the ecology and host-parasite relationships of this species. In this study, specimens of N. japonicus were collected from the following seven alien freshwater fishes on Okinawa-jima Island, southern Japan: redbelly tilapia (Tilapia zillii), Mozambique tilapia (Oreochromis mossambicus), and Nile tilapia (O. niloticus niloticus) (Perciformes: Cichlidae); bluegill (Lepomis macrochirus) (Perciformes: Centrarchidae); Indian glassy fish (Pseudambassis ranga) (Perciformes: Ambassidae); mosquitofish (Gambusia affinis) (Cyprinodontiformes: Poeciliidae); and vermiculated sailfin catfish (Pterygoplichthys disjunctivus) (Siluriformes: Loricariidae). Copepods occurred on alien fishes taken from reservoirs, but were absent on those from rivers. The dorsal fin was most heavily infected, followed by the anal fin, gills, and body surface. The native freshwater fishes in our sampling locations have been replaced by alien fishes that were introduced from various regions of the world. Our results therefore showed that this low host-specific species can persist by utilizing alien fishes as hosts even after the native fishes have either disappeared or greatly decreased in abundance. A list is also given of fishes (88 species and 3 subspecies in 7 orders and 16 families) reported as hosts of N. japonicus.

scholarly journals Diversity of Bacteria and Fungi Associated with Freshwater Fishes from Mijawal River, Nasarawa, Nigeria

2020 ◽  
Vol 24 (6) ◽  
pp. 1085-2020
Author(s):  
K.M. Adamu ◽  
H. Muhammad ◽  
S.U. Ahmad ◽  
M.M. Ahmad ◽  
A.M. Yakubu
Keyword(s):  
Fish Species ◽  
Terrestrial Ecosystems ◽  
Freshwater Fishes ◽  
Frequency Of Occurrence ◽  
Salmonella Spp ◽  
Tilapia Zillii ◽  
Fish Samples ◽  
Bacteria And Fungi ◽  
Rhizopus Sp ◽  
Mormyrus Rume

Understudying the presence of bacteria and fungi population on freshwater fishes, provides the knowledge and understanding of their diversity and potential roles they may play in the health of the aquatic and terrestrial ecosystems. The present study was conducted to evaluate the diversity of bacteria and fungi species of identified fish samples from River Mijawal, Nasarawa State. The fishes were sampled from the only landing for three months (October to December, 2019) for this study. During the sampling periods, thirteen (13) different fish species were identified; they were  swabbed with sterilized swab stick from the skin surface for bacteria and fungi identification. The Dominant fish species were Tilapia zillii, Labeo senegalensis, Mormyrus rume and Mormyrus tapines. The total number of thirteen (13) bacterial and five (5) fungi species were isolated and  identified. Eight (8) of the bacteria isolates, were gram negative bacteria (Pseudomonas sp, Aeromonas sp, Serratia mercescenes, Proteus sp, Salmonella spp, Escherichia coli, Klebsiella sp, and Enterobacter sp.); whilst the other five (5) were gram positive bacteria (Bacillus sp, Micrococcus sp, Staphylococcus sp, Enterococcus sp and Listeria monocytogenes).The five isolated fungi species were Aspergillus niger, Rhizopus sp, Penicillium  sp, Trichoderma viridae and Geotrichum candidum. The frequency of occurrence of the isolated bacteria indicated that Staphylococcus sp had the highest frequency of occurrence (16.67%) while Serratia mercescens had the least occurrence (2.78%). The highest number of occurrence of the isolated fungi species was observed in Rhizopus sp while the least was recorded in Geotricum candidum. It was observed that Tilapia zillii and  Mormyrus rume had the most frequent bacteria and fungi isolates. It can therefore be deduced from the results that fish samples identified from River Mijawal has high bacteria and fungi diversity that may be pathogenic to man. The occurrence of these microbes may be attributed of human  and animal faeces in the River  Keywords: Freshwater fishes, Microbes, River Mijawal, Nasarawa  

scholarly journals Checklist of Crustacea parasitizing fishes from Brazil

Check List ◽  
2013 ◽  
Vol 9 (6) ◽  
pp. 1449 ◽  
Author(s):  
José L. Luque ◽  
Fabiano M. Vieira ◽  
Ricardo M. Takemoto ◽  
Gilberto C. Pavanelli ◽  
Jorge C. Eiras
Keyword(s):  
Fish Species ◽  
Freshwater Fishes ◽  
Crustacean Species ◽  
Host Parasite ◽  
Host Associations

Here we provide a checklist of the crustacean species parasitizing both marine and freshwater fishes from Brazil. We list a total of 134 species of parasitic crustaceans associated with 205 species of fishes in Brazil. The data from this study added to the checklist of Copepoda in Brazilian fishes published in 2007 give a total of 251 species of parasitic crustaceans associated with 279 fish species currently known in Brazil. The majority of species of Crustacea listed as parasites of Brazilian fishes are Copepoda with 186 species registered. A total of 741 parasite-host associations were observed. Copepoda was the group with more host-parasite associations, totaling 419 associations. When comparing these data with those recorded for the fishes from other parasite hotspots of Neotropics (Mexico and Caribbean), it is possible to affirm that the fauna of parasitic crustaceans of Brazilian fishes is the richest in the region.

An Assessment of the Endo-Parasites of Littoral Fish From Lake Taal, Batangas, Philippines

2017 ◽  
Vol 11 (1) ◽  
Keyword(s):  
Feeding Habits ◽  
Parasite Burden ◽  
Fish Parasites ◽  
Local Policy ◽  
Ecosystem Integrity ◽  
Littoral Fish ◽  
Quantitative Measurements ◽  
The Status ◽  
Glossogobius Giuris ◽  
Host Parasite

The importance of fish parasite research is now only gaining traction not only from biodiversity scientists, but also to ecologists and local policy makers as well. Fish parasites are ecologically important for they are good indicators of ecosystem integrity. In this study, fish endo-parasites of various littoral fish species in Lake Taal were identified and the status of endo-parasitism of the lake was evaluated by providing factors on host-parasite interaction such as feeding habits and host body size, which affect the prevalence of parasites, and their mean intensity. With the unique ecosystem of Lake Taal, it calls for further research especially about biodiversity assessments. Fish specimens were collected and subjected to parasitological examination by extracting their gut, immersing them to 0.9% saline solution, and examining them for the presence of endo-parasites. The samples were taken using beach seine trawling near coastal areas with the aid of the local fishermen. A total of 711 fish specimens were collected from the months of July, August, and September 2015. From these, parasites were seen from 11 fish specimens belonging to 5 different species (Channa striata, Glossogobius giuris, Parachromis managuensis, Toxotes jaculatrix, and Zenarchopterus sp.). Three parasite genera were identified, namely Opegaster sp. (Platyhelminthes: Opecoelidae), Camallanus sp. (Nematoda: Camallanidae), and Andracantha sp. (Acanthocephala: Polymorphidae). From these three parasites spanning three different phyla, Andracantha sp. is the first report of its genera from Philippine fish, providing a contribution to the present Philippine parasite biodiversity listing. The quantitative measurements of parasite burden correlated with the factors aforementioned showed the low endo-parasitism within the lake.

Survey of the endohelminth parasites of freshwater fishes in the upper Mezquital River Basin, Durango State, Mexico

Zootaxa ◽  
2009 ◽  
Vol 2164 (1) ◽  
pp. 1-20 ◽  
Author(s):  
G. PÉREZ-PONCE DE LEÓN ◽  
R. ROSAS-VALDEZ ◽  
B. MENDOZA-GARFIAS ◽  
R. AGUILAR-AGUILAR ◽  
J. FALCÓN-ORDAZ ◽  
...  
Keyword(s):  
River Basin ◽  
Fish Fauna ◽  
Freshwater Fishes ◽  
Point Of View ◽  
Helminth Parasites ◽  
Northern Mexico ◽  
Transitional Area ◽  
Freshwater Fish Fauna ◽  
New Hosts ◽  
Host Parasite

As a part of an ongoing inventory of the helminth parasites of freshwater fishes in Mexico, 676 specimens were collected between November 2007 and December 2008 in 23 localities along the upper Mezquital River Basin in Durango State, northern Mexico. Sixteen species of hosts, mostly corresponding to Nearctic freshwater elements, were studied. A total of 1,230 individual worms were collected during this survey, representing 25 species of endohelminths of which 9 were digeneans, 3 were cestodes, 4 were acanthocephalans, and 9 were nematodes. The checklist contains 24 new hosts and 42 new locality records. The information provided in this checklist may be helpful for our understanding of the biodiversity and historical biogeography of this host-parasite system, since the Mezquital River Basin mostly contains a Nearctic freshwater fish fauna, with a few Neotropical and endemic elements and may represent a transitional area from a biogeographical point of view.

Seasonal variability in the gut ultrastructure of the parasitic copepod Neoergasilus japonicus (Copepoda, Poecilostomatoida)

2004 ◽  
Vol 82 (10) ◽  
pp. 1655-1666 ◽  
Author(s):  
A Baud ◽  
C Cuoc ◽  
J Grey ◽  
R Chappaz ◽  
V Alekseev
Keyword(s):  
Life Cycle ◽  
Stable Isotope ◽  
Physiological Activity ◽  
Parasitic Copepod ◽  
Free Living ◽  
The Family ◽  
Neoergasilus Japonicus ◽  
Structure And Ultrastructure ◽  
The Relationship ◽  
Isotope Analyses

The gut structure and ultrastructure of Neoergasilus japonicus (Harada, 1930), a copepod from the family Ergasilidae (Copepoda, Poecilostomatoida) and a parasite of fish, were compared at different periods of the life cycle: in free-living specimens in October and after attaching to fish in January and June. Differences in the depth of the intestinal epithelium were prominent and other cellular characteristics appeared seasonally variable. We relate these to changes in the physiological activity. Preliminary data from stable-isotope analyses of attached specimens suggest nutritional contribution from parasitism. The possibility of a diapause in the life cycle, as well as the relationship between the morphology of the gut and early evolutionary parasitism of N. japonicus, are discussed.

Intra- and interspecific genetic diversity of New Zealand hairworms (Nematomorpha)

Parasitology ◽  
2017 ◽  
Vol 144 (8) ◽  
pp. 1026-1040 ◽  
Author(s):  
ZACHARY J. C. TOBIAS ◽  
ARUN K. YADAV ◽  
ANDREAS SCHMIDT-RHAESA ◽  
ROBERT POULIN
Keyword(s):  
Genetic Diversity ◽  
New Zealand ◽  
Sequence Data ◽  
Phylogenetic Analyses ◽  
Population Level ◽  
Morphological Classification ◽  
Widespread Species ◽  
Sampling Locations ◽  
Host Parasite ◽  
Eggs And Larvae

SUMMARYHairworms (Nematomorpha) are a little-known group of parasites, and despite having been represented in the taxonomic literature for over a century, the implementation of molecular genetics in studies of hairworm ecology and evolution lags behind that of other parasitic taxa. In this study, we characterize the genetic diversity of the New Zealand nematomorph fauna and test for genetic structure within the most widespread species found. We provide new mitochondrial and nuclear ribosomal sequence data for three previously described species from New Zealand:Gordius paranensis, Parachordodes diblastusandEuchordodes nigromaculatus. We also present genetic data on a previously reported but undescribedGordiussp., as well as data from specimens of a newGordionussp., a genus new for New Zealand. Phylogenetic analyses of CO1 and nuclear rDNA regions correspond with morphological classification based on scanning electron microscopy, and demonstrate paraphyly of the genusGordionusand the potential for cryptic species withinG. paranensis. Population-level analyses ofE. nigromaculatusshowed no genetic differentiation among sampling locations across the study area, in contrast to previously observed patterns in known and likely definitive hosts. Taken together, this raises the possibility that factors such as definitive host specificity, intermediate host movement, and passive dispersal of eggs and larvae may influence host–parasite population co-structure in hairworms.

Host–parasite relationships between burbot (Lota lota) and adult Salmincola lotae (Copepoda)

1988 ◽  
Vol 66 (11) ◽  
pp. 2459-2463 ◽  
Author(s):  
Becky A. Lasee ◽  
Daniel R. Sutherland ◽  
Maryjo E. Moubry
Keyword(s):  
Lake Michigan ◽  
Mechanical Damage ◽  
Parasitic Copepod ◽  
Tissue Reaction ◽  
Primary Host ◽  
Lota Lota ◽  
Leucocyte Infiltration ◽  
Parasite Feeding ◽  
Host Parasite ◽  
Host Tissues

The pathology elicited by the parasitic copepod Salmincola lotae and its distribution within the oral cavity of the burbot, Lota lota, is described. Of 50 burbot examined from the Apostle Islands region, Lake Superior, near Bayfield, WI, 18 (36%) were infested with S. lotae. A total of 63 copepods were recovered. Burbot were examined from three Lake Michigan collecting sites: 70 from Sturgeon Bay, 9 from Manitowoc, and 60 from Sheboygan were not infested with S. lotae. Salmincola lotae appears to prefer middle regions of the roof of the mouth. Mechanical damage to host tissues resulting from copepod presence included epidermal shredding from parasite feeding and lesions from bulla excavation and implantation. Epidermal encapsulation of the second maxillae of S. lotae was the primary host tissue reaction. Increased dermal vascularization and leucocyte infiltration occurred in regions of parasite attachment. This is the first report of S. lotae from the Nearctic.

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