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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
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Data from: Fluid preservation causes minimal reduction of parasite detectability in fish specimens: a new approach for reconstructing parasite communities of the past?
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Data from: Parasites alter interaction patterns in fish social networks
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FIGURE 44 in Parasitic copepods of the family Lernanthropidae Kabata, 1979 (Copepoda: Siphonostomatoida) from Australian fishes, with descriptions of seven new species
FIGURE 44. Sagum lativentris (Heller, 1865) n. comb., adult ♀. A, habitus, dorsal; B, habitus, lateral; C, habitus, ventral. Scale bar 1 mm.
FIGURE 45 in Parasitic copepods of the family Lernanthropidae Kabata, 1979 (Copepoda: Siphonostomatoida) from Australian fishes, with descriptions of seven new species
FIGURE 45. Sagum lativentris (Heller, 1865) n. comb., adult ♀. A, urosome, dorsal view showing vestigial fifth legs (arrow- heads), paired genital openings, copulatory pores (arrowed) and caudal rami; B, posterior end of trunk and urosome, ventral view showing extent of lobes of leg 4 relative to caudal rami; C, antennule; D, antenna; E, postantennal process; F, mandible; G, maxillule; H, maxilla. Scale bars A, 200 μm, B, 0.5 mm, C,E–H, 50 μm, D, 100 μm.
FIGURE 47 in Parasitic copepods of the family Lernanthropidae Kabata, 1979 (Copepoda: Siphonostomatoida) from Australian fishes, with descriptions of seven new species
FIGURE 47. Sagum sanguineus (Song, in Song & Chen, 1976) n. comb., adult ♀. A, habitus, dorsal: B, urosome, dorsal view showing vestigial fifth legs (arrowed), paired genital openings and caudal rami; C, posterior end of trunk and urosome, ventral view showing extent of lobes of leg 4 relative to tips of caudal rami; D, egg sac; E, antennule; F, antenna; G, postantennal process; H, maxillule; I, basis of maxilla; J, maxilliped. Scale bars A, 1 mm, B,D, 200 μm, C, 0.5 mm, E,G,H, 50 μm, F,I,J, 100 μm.
FIGURE 42 in Parasitic copepods of the family Lernanthropidae Kabata, 1979 (Copepoda: Siphonostomatoida) from Australian fishes, with descriptions of seven new species
FIGURE 42. Mitrapus oblongus (Pillai, 1964) adult ♀. A, habitus, dorsal; B, habitus, lateral; C, habitus, ventral. Scale bar 1 mm.
FIGURE 40 in Parasitic copepods of the family Lernanthropidae Kabata, 1979 (Copepoda: Siphonostomatoida) from Australian fishes, with descriptions of seven new species
FIGURE 40. Lernanthropus selenotoca sp. nov., paratype ♀. A, habitus, ventral; B, habitus, lateral; C, habitus, dorsal. Scale bar 1 mm.
FIGURE 46 in Parasitic copepods of the family Lernanthropidae Kabata, 1979 (Copepoda: Siphonostomatoida) from Australian fishes, with descriptions of seven new species
FIGURE 46. Sagum lativentris (Heller, 1865) n. comb., adult ♀. A, maxilliped; B, leg 1 and intercoxal sclerite; C, leg 2. Adult ♂. D, habitus, dorsal; E, genital operculum and caudal ramus on right side, ventral view; F, parabasal flagellum; G, tip of max- illa; H, maxilliped; I, endopod of leg 1; J, leg 2. Scale bars A,B,E,H, 100 μm, C,F,G,J, 50 μm, D, 0.5 mm, I, 25 μm.
FIGURE 38. Lernanthropus seriolii Shishido, 1898 in Parasitic copepods of the family Lernanthropidae Kabata, 1979 (Copepoda: Siphonostomatoida) from Australian fishes, with descriptions of seven new species
FIGURE 38. Lernanthropus seriolii Shishido, 1898, adult ♀. A, habitus, lateral; B, habitus, lateroventral; C, habitus, dorsolat- eral. Scale bar 5 mm.
FIGURE 34 in Parasitic copepods of the family Lernanthropidae Kabata, 1979 (Copepoda: Siphonostomatoida) from Australian fishes, with descriptions of seven new species
FIGURE 34. Lernanthropus paracruciatus sp. nov., paratype ♀♀. A–F, dorsal habitus of different females showing varying degrees of damage to dorsal trunk plate and posterior legs. Scale bar 5 mm.
FIGURE 24 in Parasitic copepods of the family Lernanthropidae Kabata, 1979 (Copepoda: Siphonostomatoida) from Australian fishes, with descriptions of seven new species
FIGURE 24. Lernanthropus gnathanodontus sp. nov., paratype ♂. A, tip of maxilla; B, maxilliped; C, leg 1 and intercoxal sclerite; D, leg 2; E, exopod of leg 2, anterior view; F, endopod of leg 3, showing surface ornamentation. Lernanthropus latis Yamaguti, 1954, adult ♀. G, habitus, dorsal. Scale bars A, C–F, 50 μm, B, 100 μm, G 1 mm.
FIGURE 22 in Parasitic copepods of the family Lernanthropidae Kabata, 1979 (Copepoda: Siphonostomatoida) from Australian fishes, with descriptions of seven new species
FIGURE 22. Lernanthropus gnathanodontus sp. nov., paratype ♀. A, urosome, dorsal view showing fifth leg on left side only, genital openings (arrowed on right side) and caudal rami; B, antennule and parabasal flagellum; C, antenna; D, frontal part of cephalothorax, ventral view showing location of paired postantennal processes (arrowed); E, tip of mandible; F, maxillule; G, maxilla; H, maxilliped. Scale bars A, 200 μm, B,C,H 100 μm, D, 0.5 mm, E, 20 μm, F,G, 50 μm.
FIGURE 49. Sagum vespertilio Kabata, 1979 in Parasitic copepods of the family Lernanthropidae Kabata, 1979 (Copepoda: Siphonostomatoida) from Australian fishes, with descriptions of seven new species
FIGURE 49. Sagum vespertilio Kabata, 1979, adult ♀. A, habitus, lateral; B, habitus, dorsal; C, habitus, ventral. Scale bar 2 mm.
FIGURE 1 in Parasitic copepods of the family Lernanthropidae Kabata, 1979 (Copepoda: Siphonostomatoida) from Australian fishes, with descriptions of seven new species
FIGURE 1. Aethon bicamera sp. nov., holotype ♀. A, habitus, dorsal; B, habitus, ventral; C, habitus, lateral. Scale bar 2 mm.
FIGURE 13. Lernanthropus breviculus Kabata, 1979 in Parasitic copepods of the family Lernanthropidae Kabata, 1979 (Copepoda: Siphonostomatoida) from Australian fishes, with descriptions of seven new species
FIGURE 13. Lernanthropus breviculus Kabata, 1979, adult ♀. A, urosome and caudal rami, dorsal; B, antennule; C, antenna; D, tip of maxilla; E, maxilliped; F, leg 1 and part of intercoxal sclerite; G, leg 2. Scale bars A,C,E,G, 200 μm, B 100 μm, D,F, 50 μm.
Parasite infestation influences life-history but not boldness behavior in placental live-bearing fish
<p>Parasites can negatively affect the reproductive success of hosts. Placental species may be particularly susceptible, because parasite-induced stress during pregnancy could potentially influence embryo development. Here we examine the consequences of a trematode infestation (black spot disease, BSD) for fetal development and adult behavior in 19 natural populations of the placental live-bearing fish species <i>Poeciliopsis retropinna </i>(Poeciliidae)<i> </i>in Costa Rica. First, we observed substantial variation in parasite infestation among populations which correlated with a number of local environmental conditions (elevation, river width, depth, and flow velocity). Furthermore, we observed substantial variation in parasite infestation among females within populations associated with maternal age and size. We found that the infestation rate significantly influenced embryonic development, with more heavily parasitized females producing smaller and worse-conditioned offspring at birth, possibly because a costly immune response during pregnancy limits, either directly or indirectly, nourishment to developing embryos. Finally, a behavioral experiment in the field showed that the infestation rate did not affect an individual's boldness. Our study indicates that in placental live-bearing fish parasite infestation leads to reduced embryo provisioning during pregnancy, resulting in a smaller offspring size and quality at birth potentially with negative implications for offspring fitness.</p>
Testing for deterministic succession in metazoan parasite communities of marine fish
Parasite communities are similar to free-living communities; decay of similarity over geographic distance, theory of island biogeography, species-area relationships and nestedness have been documented in both communities. Ecological succession has been studied in free-living communities but has rarely been examined in parasite communities. We use seriation with replication to test the hypothesis that succession of parasite community structure is deterministic, thus developing throughout consecutive changes along the fish ontogeny, via a seriated pattern. 12,306 marine fishes (95 species) were studied. In 40 species, a seriated pattern was detected; 25 had a tendency toward a seriated pattern, and for 31 species, succession was at random. Age-classes for each host species explained deterministic successional patterns for whole parasite communities and ectoparasites. Richness and number of age-classes explained this pattern for endoparasites. Seriated successional community pattern was evident for parasite communities of long-lived marine fish, indicating that parasite communities follow sequential changes over time, like many free-living communities.
Data from: Weak link between dispersal and parasite community differentiation or immunogenetic divergence in two sympatric cichlid fishes
Geographical isolation, habitat variation and trophic specialization have contributed to a large extent to the astonishing diversity of cichlid fishes in the Great East African lakes. Because parasite communities often vary across space and environments, parasites can accompany and potentially enhance cichlid species diversification. However, host dispersal may reduce opportunities for parasite-driven evolution by homogenizing parasite communities and allele frequencies of immunity genes. To test for the relationships between parasite community variation, host dispersal and parasite-induced host evolution, we studied two sympatric cichlid species with contrasting dispersal capacities along the shores of southern Lake Tanganyika. Whereas the philopatric Tropheus moorii evolved into several genetically differentiated colour morphs, Simochromis diagramma is phenotypically rather uniform across its distribution range and shows only weak population structure. Populations of both species were infected with divergent parasite communities and harbour differentiated variant pools of an important set of immune genes, the major histocompatibility complex (MHC). The overall extent of geographical variation of parasites and MHC genes was similar between host species. This indicates that immunogenetic divergence among populations of Lake Tanganyika cichlids can occur even in species that are strongly dispersing. However, because this also includes species that are phenotypically uniform, parasite-induced evolution may not represent a key factor underlying species diversification in this system.
Data from: Pathways of cryptic invasion in a fish parasite traced using coalescent analysis and epidemiological survey
Introduced species have the potential to outperform natives via the introduction of new parasites to which the native ecosystem is vulnerable. Cryptic diversity within an invasive species can obscure invasion patterns and confound proper management measures. The aim of this study is to use coalescent theory based methodology to trace recent routes of invasion in populations of Ligula intestinalis, a globally distributed fish parasite possessing both native and recently introduced populations in North Africa. Molecular analyses of mitochondrial DNA discerned a pronounced genetic divergence between introduced and native populations. Distribution of mitochondrial haplotypes demonstrated common origin of European populations with North African parasites sampled from introduced fish species in Tunisia. To test the suggested pathway of introduction, microsatellite data were examined in a model-based coalescent analysis using the software MIGRATE, where Europe to Tunisia direction of migration was favoured over alternative hypotheses of gene flow. Specificity of Tunisian populations to different host species was assessed in an epidemiologic survey confirming prevailing host-based division between introduced and native parasites in North Africa. This approach combining advanced analysis of molecular markers with host-specificity data allows revealing the evolution of host-parasite interactions following biological invasion and provides basis for devising future management measurements.
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
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