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697 results for “fish parasite”
Data from: Parasitic fish embryos do a 'front-flip' on the yolk to resist expulsion from the host
<p><span>Bitterlings are brood parasitic fish which complete their early development in the internal gill spaces of freshwater mussels. Bitterling embryos have wing-like yolk sac extensions that help prevent them from being expelled from the gills by the water flow</span><span>. The ability to resist expulsion may be helped by the consistent 'head-down' position that all embryos adopt in the gills</span><span>. The mechanism behind this positioning is unknown. We hypothesise here that it might lie in a process of unknown function, specific to bitterlings. That process is <em>blastokinesis</em> — the rotation of the embryo on the yolk ball before hatching</span><span>. </span>We used time-lapse imaging, histology, X-ray tomography, and expression profiling of the genes <em>fgf8a</em>,<em> krt8</em>,<em> msx3 </em>and <em>ctslb</em> by <em><span>in situ</span></em><span> hybridization in the </span>pre-hatching and hatching stages of the rosy bitterling (<em>Rhodeus ocellatus</em>). We find <span>that blastokinesis is a gastrulation process that has been ventralized by the shape of the yolk mass. Furthermore, we show that bitterlings, unlike other teleosts, hatch mechanically without hatching enzymes, and we provide evidence that this is mediated instead by the apical tubercles on the yolk sac extension. Finally, our data suggest that blastokinesis is functional, because it represents the mechanism behind the optimal, 'head-down' positioning of the embryo. Our study provides an example of how selection pressures can lead to a suite of dramatic and coordinated modifications of early development.</span></p>
Data on the occurrence on anisakids and other parasites in fishery products from wild and farmed fish in all countries (Jan 2010 – Sept 2023)
<p><span>This file contains data on anisakids and other parasites in fishery products from wild and farmed fish in all countries, covering studies published between January 2010 and September 2023. The systematic review protocol used to identify and extract the information is available at <a href="https://zenodo.org/records/10270810"> https://zenodo.org/records/10270810</a>. For data on anisakids for the period 2010-2020, this file is complementary to the zenodo file https://zenodo.org/records/14047972, and includes publications that were not selected in published meta-analyses. </span></p>
Fig 1 in Incidence of parasitic infection in adult and juvenile Clarias gariepinus in a private fish farm, Yola, Adamawa state
Fig 1: Sex Variation in Prevalence (%) of Parasitic Infection of Culture Clarias gariepinus
Plate 4 in Incidence of parasitic infection in adult and juvenile Clarias gariepinus in a private fish farm, Yola, Adamawa state
Plate 4: Capillaria parasites recovered from the stomach and intestine of C. gariepinu
Plate 6 in Incidence of parasitic infection in adult and juvenile Clarias gariepinus in a private fish farm, Yola, Adamawa state
Plate 6: Piscinoodinium (Dinoflagellate) found on the gill of adult Clarias gariepinus
Plate 2 in Incidence of parasitic infection in adult and juvenile Clarias gariepinus in a private fish farm, Yola, Adamawa state
Plate 2: Internal organ of adult Clarias gariepinus dissection indicating the stomach, intestine
Plate 3 in Incidence of parasitic infection in adult and juvenile Clarias gariepinus in a private fish farm, Yola, Adamawa state
Plate 3: Piscinoodinium (Dinoflagellate) found on the skin of adult Clarias gariepinus
Fig. 1 in Helminth parasites of alien freshwater fishes in Patagonia (Argentina)
Fig. 1. Map of Argentinean Patagonia; the sampling localities of present study are shown.
Figure 4 in Intensity and prevalence of some crustacean fish parasites in Turkey and their molecular identification
Figure 4. Caligus minimus male (A), caudal rami (B), lunules (C), sternal furca (D).
Figure 2 in Intensity and prevalence of some crustacean fish parasites in Turkey and their molecular identification
Figure 2. Caligus minimus on mouth cavity (A) and tongue (B) of Dicentrarchus labrax.
Figure 1 in Intensity and prevalence of some crustacean fish parasites in Turkey and their molecular identification
Figure 1. Sampling area.
Figure 4 in New location, food composition, and parasitic fauna of the invasive fish Pseudorasbora parva (Temminck & Schlegel, 1846) (Cyprinidae) in Poland
Figure 4. Von Bertalanffy growth curve for males and females of stone moroko from Wardynka creek.
It's a wormy world: Meta-analysis reveals several decades of change in the global abundance of the parasitic nematodes Anisakis spp. and Pseudoterranova spp. in marine fishes and invertebrates
<p>The Anthropocene has brought substantial change to ocean ecosystems, but whether this age will bring more or less marine disease is unknown. In recent years, the accelerating tempo of epizootic and zoonotic disease events has made it seem as if disease is on the rise. Is this apparent increase in disease due to increased observation and sampling effort, or to an actual rise in the abundance of parasites and pathogens? We examined the literature to track long-term change in the abundance of two parasitic nematode genera with zoonotic potential: <em>Anisakis</em> spp. and <em>Pseudoterranova</em> spp. These anisakid nematodes cause the disease anisakidosis and are transmitted to humans in undercooked and raw marine seafood. A total of 123 papers published between 1967 and 2017 met our criteria for inclusion, from which we extracted 755 host–parasite–location–year combinations. Of these, 69.7% concerned <em>Anisakis</em> spp. and 30.3% focused on <em>Pseudoterranova</em> spp. Meta-regression revealed an increase in <em>Anisakis</em> spp. abundance (average number of worms/ fish) over a 53 year period from 1962 to 2015 and no significant change in <em>Pseudoterranova</em> spp. abundance over a 37 year period from 1978 to 2015. Standardizing changes to the period of 1978–2015, so that results are comparable between genera, we detected a significant 283-fold increase in <em>Anisakis</em> spp. abundance and no change in the abundance of <em>Pseudoterranova</em> spp. This increase in <em>Anisakis</em> spp. abundance may have implications for human health, marine mammal health, and fisheries profitability.</p>
Data set to: Mapping a brain parasite: occurrence and spatial distribution in fish encephalon
<p>Data for the manuscript "Mapping a brain parasite: occurrence and spatial distribution in fish encephalon", doi: 10.1016/j.ijppaw.2023.03.004. Description of the distribution of metacercariae from the trematode species <em>Cardiocephaloides longicollis</em> in the brain of fish. </p>
Parasitic mussels induce upstream movement in their fish hosts: early evidence of extended phenotype
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Data from: A habitat and a parasite: Adult and larval parasitic freshwater mussels impact habitat choice and predator-prey interactions of a host fish and its prey
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Parasite infection disrupts escape behaviour in fish shoals
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Negative associations between parasite avoidance, resistance and tolerance predict host health in salmonid fish populations
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It's a wormy world: Meta-analysis reveals several decades of change in the global abundance of the parasitic nematodes Anisakis spp. and Pseudoterranova spp. in marine fishes and invertebrates
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Life history shifts in an exploited African fish following invasion by a castrating parasite
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OpenNeuro
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