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https://www.readbyqxmd.com/read/28921570/behavioural-responses-of-infective-stage-copepodids-of-the-salmon-louse-lepeophtheirus-salmonis-copepoda-caligidae-to-host-related-sensory-cues
#1
D M Fields, A B Skiftesvik, H I Browman
The salmon louse (Lepeophtheirus salmonis [Krøyer]) is an ectoparasitic copepod that causes disease in farmed Atlantic salmon (Salmo salar) and may play a role in the decline of some wild salmonid populations. Controlling lice infestations is a major cost for the salmon industry; this has stimulated the pursuit of alternative approaches to controlling them. One such approach involves determining, and then disrupting, the sensory cues used by the parasite to find its host. In this context, we examined the behavioural responses of lice copepodids to light flicker-simulating light reflecting from the sides of the salmon host and/or the shadows cast by fish passing overhead-and water-soluble chemicals released from the skin of the salmon...
September 17, 2017: Journal of Fish Diseases
https://www.readbyqxmd.com/read/28895011/caligus-fajerae-n-sp-copepoda-caligidae-parasitic-on-the-pacific-sierra-scomberomurus-sierra-jordan-starks-actinopterygii-scombridae-in-the-pacific-ocean-off-mexico
#2
Francisco Neptalí Morales-Serna, Alejandro Oceguera-Figueroa, Danny Tang
A new species of parasitic copepod, Caligus fajerae n. sp. (Caligidae), is described from Scomberomorus sierra Jordan & Starks (Scombridae) caught off the northwestern coast of Mexico. The new species morphologically resembles Caligus cybii Bassett-Smith, 1898, Caligus kanagurta Pillai, 1961, Caligus pelamydis Krøyer, 1863 and Caligus robustus Bassett-Smith, 1898, all of which have been reported from scombrid hosts. Caligus fajerae n. sp. differs from these species by having spinules on the abdomen and caudal ramus, two processes on the proximal antennulary segment, fine striations on the claw of the antenna and maxilliped, a stouter and more recurved maxillulary dentiform process, shorter tines on the sternal furca, two additional patches of spinules on the distal endopodal segment of leg 2, a sclerotised lobe on the anteromedian surface of the leg 3 protopod and serrations on both margins of the first exopodal spine of leg 3...
September 11, 2017: Systematic Parasitology
https://www.readbyqxmd.com/read/28831035/molecular-phylogeny-and-revision-of-copepod-orders-crustacea-copepoda
#3
Sahar Khodami, J Vaun McArthur, Leocadio Blanco-Bercial, Pedro Martinez Arbizu
For the first time, the phylogenetic relationships between representatives of all 10 copepod orders have been investigated using 28S and 18S rRNA, Histone H3 protein and COI mtDNA. The monophyly of Copepoda (including Platycopioida Fosshagen, 1985) is demonstrated for the first time using molecular data. Maxillopoda is rejected, as it is a polyphyletic group. The monophyly of the major subgroups of Copepoda, including Progymnoplea Lang, 1948 (=Platycopioida); Neocopepoda Huys and Boxshall, 1991; Gymnoplea Giesbrecht, 1892 (=Calanoida Sars, 1903); and Podoplea Giesbrecht, 1892, are supported in this study...
August 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28769694/a-new-species-of-notodiaptomus-from-the-amazon-basin-crustacea-copepoda-calanoida-diaptomidae
#4
Daniel Previattelli, Gilmar Perbiche-Neves, Carlos E F da Rocha
A new Diaptomidae species is presented from the Neotropical region. It was found in two Amazonian lakes, Ressaca and Arapujá, both in Pará State, Brazil. The lakes are 400 km apart and threatened by the building of reservoirs for hydropower generation and pollution by human settlements. The new species resembles N. paraensis Dussart & Robertson, 1984, but it can be distinguished from this species and other congeners in having a special process on the fifth leg basis of the male, by the place of insertion of lateral spine in the last segment of right P5 of male, the shape and relationship between length and width of segments of male and female P5 exopodite 2 with stout inner process bearing short setules and outer small spine, exopodite 3, with two terminal setae, outer smaller; endopodite 1-segmented with one subterminal seta and oblique comb of spinules, the presence of a line of dorsal spinules at the distal margin of thoracic somites in both sexes...
2017: ZooKeys
https://www.readbyqxmd.com/read/28769658/a-new-anchialine-stephos-scott-from-the-yucatan-peninsula-with-notes-on-the-biogeography-and-diversity-of-the-genus-copepoda-calanoida-stephidae
#5
Eduardo Suárez-Morales, Martha A Gutiérrez-Aguirre, Adrián Cervantes-Martínez, Thomas M Iliffe
Surveys of the anchialine crustacean fauna of the Yucatan Peninsula (YP), Mexico, have revealed the occurrence of calanoid copepods. The genus Stephos Scott, 1892, belonging to the family Stephidae is among the most frequent and widely distributed groups in anchialine caves but has not been hitherto recorded from the YP. Recent collections from an anchialine cave in an island off the northern coast of the YP yielded many specimens of a new species of Stephos. The new taxon, S. fernandoisp. n., is described here based on male and female specimens...
2017: ZooKeys
https://www.readbyqxmd.com/read/28769625/two-new-species-of-leptopsyllus-from-korea-copepoda-harpacticoida-paramesochridae
#6
Jinwook Back, Wonchoel Lee
Two new species of Leptopsyllus are described from the subtidal zone of Korea. Both species were assigned to the subgenus Leptopsyllus (Leptopsyllus) T. Scott, 1894, based on following three characters: two-segmented rami of P1, absence of endopod on P2 and P3, and presence of one-segmented endopod of P4. L. (L.) pundius sp. n. is most closely related to L. (L.) punctatus Mielke, 1894, however clearly distinguishable from it based on mandibular exopod with two setae, shape of P6, and caudal seta III ornamented with spinules in the new species...
2017: ZooKeys
https://www.readbyqxmd.com/read/28746553/gill-parasites-of-fish-from-two-estuaries-in-northeastern-brazil-new-hosts-and-geographical-records
#7
Jéssica E S A Golzio, Júlia M Falkenberg, Rayssa C G Praxedes, Anderson S Coutinho, Mylena K Laurindo, André Pessanha, Rubens R Madi, Joana Patrício, Ana L Vendel, Geza T R Souza, Cláudia M Melo, Ana Carolina F Lacerda
Parasites are important components of communities and constitute great part of the biological diversity found in ecosystems, providing valuable information about their hosts and the environment in which they live. However, despite its importance, parasitic diversity is still not well known in some regions of Brazil, especially with respect to fish parasites in the Northeast Region. The present study aims to perform the survey of gill parasites of fish from two tropical estuaries located in northeastern Brazil: Paraíba and Mamanguape rivers...
July 20, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28677150/histopathological-changes-on-the-gills-of-asp-aspius-aspius-and-european-catfish-silurus-glanis-caused-by-lamproglena-pulchella-and-a-lamproglena-sp-copepoda-lernaeidae-respectively
#8
K Molnár, A Avenant-Oldewage, B Sellyei, Á Varga, C Székely
In a parasitology survey of Hungarian fishes, heavy infections of parasitic copepods Lamproglena pulchella and a Lamproglena sp. were found in the gills of the asp and the European catfish, respectively. Individuals of both fish species were emaciated and infected with hundreds of Lamproglena. Copepods located close to the tip of gill filaments and formed a depression at the attachment sites. In histological sections, cell degenerations and local haemorrhages were present adjacent to the maxillipeds and where the maxillary claws pierced the gill tissue...
July 5, 2017: Journal of Fish Diseases
https://www.readbyqxmd.com/read/28649318/zooplankton-communities-and-bythotrephes-longimanus-in-lakes-of-the-montane-region-of-the-northern-alps
#9
Zsófia Horváth, Csaba F Vad, Christian Preiler, Julia Birtel, Blake Matthews, Radka Ptáčníková, Robert Ptacnik
Lakes in the Alps represent a considerable fraction of nutrient-poor lakes in Central Europe, with unique biodiversity and ecosystem properties. Although some individual lakes are well-studied, less knowledge is available on large-scale patterns essential to generalise the understanding of their functioning. Here, we aimed to describe crustacean zooplankton communities (Cladocera, Copepoda) and identify their environmental drivers in the pelagic zone of 54 oligotrophic lakes in the montane region of the Alps (400-1200 m) in Austria, Germany, and Switzerland, covering a spatial scale of 650 km...
May 2, 2017: Inland Waters
https://www.readbyqxmd.com/read/28610128/review-of-i-pennella-i-oken-1816-copepoda-pennellidae-with-a-description-of-i-pennella-i-i-benzi-i-sp-nov-a-parasite-of-escolar-i-lepidocybium-i-i-flavobrunneum-i-pisces-in-the-northwest-atlantic-ocean
#10
W E Hogans
The genus Pennella Oken, 1816, mesoparasitic copepods from marine fish and mammals, is reviewed with the objective of determining the validity of members of the genus. Details of the external morphological structures of the adult female are presented. Pennella species are differentiated based on a combination of characters: the type of host parasitized, overall length of the parasite, shape, size and configuration of cephalothoracic papillae, segmentation of the first and second antenna, holdfast horn number, shape and configuration, and structure of the abdominal plumes...
March 17, 2017: Zootaxa
https://www.readbyqxmd.com/read/28610056/a-new-asterocherid-genus-copepoda-siphonostomatoida-associated-with-i-callyspongia-i-duchassaing-amp-michelotti-and-reassessment-of-six-species-of-i-asterocheres-i-boeck
#11
Roberta Canário, Carlos Eduardo Falavigna DA Rocha, Elizabeth Neves, Rodrigo Johnsson
The family Asterocheridae Giesbrecht has several genera associated with sponges including Asterocheres Boeck, 1859. The type genus is commonly found in sponges but it is also recorded in echinoderms, bryozoans, and corals. A revision of the diagnosis of Asterocheres conducted in 2010 was the beginning of a reorganization process, culminating in the present status of 63 valid species. This study describes a new species and genus of the Asterocheridae. Neoasterocheres gen. nov. shares many characteristics with Asterocheres sensu stricto, except for the antennule segmentation which shows ancestral segments IX-XII fused to segment XIII...
March 27, 2017: Zootaxa
https://www.readbyqxmd.com/read/28609898/fauna-of-cladocera-and-copepoda-from-xinjiang-uyghur-autonomous-region-china
#12
Elena S Chertoprud, Artem Y Sinev, Inta Dimante-Deimantovica
This study evaluates the species composition of Cladocera and Copepoda in the five lakes of the Bogda-Shan Mountain range and in the floodplain of the Tarim and Konchedarya rivers located in the Xinjiang Uygur Autonomous Region of China (Xinjiang). We collected seven species of Cladocera and six species of Copepoda. Seven species were identified as new for Xinjiang fauna, and two species (Cyclops cf. herberti Einsle, 1996, and Eucyclops roseus Ishida, 1997) were first records for China. Herein, we characterize the distribution ranges for the detected species and provide taxonomic remarks...
May 3, 2017: Zootaxa
https://www.readbyqxmd.com/read/28603248/revision-of-the-i-remaneicaris-i-i-argentina-i-group-copepoda-harpacticoida-parastenocarididae-supplementary-description-of-species-and-description-of-the-first-semi-terrestrial-i-remaneicaris-i-from-the-tropical-forest-of-southeast-mexico
#13
Paulo Henrique C Corgosinho, Nancy F Mercado-Salas, Pedro Martínez Arbizu, Edinaldo Nelson Dos Santos Silva, Terue C Kihara
Remaneicaris is a species-rich Neotropical monophyletic group, easily recognized by the synapomorphic position of the outer seta of the third exopodite of leg 4, localized at 2/3 of the outer margin. The genus, comprising 35 species in five monophyletic groups, plus R. ignotus and R. meyerabichi, retains an unusual set of plesiomorphic characters. Herein we supplement the descriptions of the species belonging to the Remaneicaris argentina-group, and describe a new species from the tropical forest of Southeast Mexico...
March 6, 2017: Zootaxa
https://www.readbyqxmd.com/read/28582411/ionotropic-receptors-signal-host-recognition-in-the-salmon-louse-lepeophtheirus-salmonis-copepoda
#14
Anna Z Komisarczuk, Sindre Grotmol, Frank Nilsen
A remarkable feature of many parasites is a high degree of host specificity but the mechanisms behind are poorly understood. A major challenge for parasites is to identify and infect a suitable host. Many species show a high degree of host specificity, being able to survive only on one or a few related host species. To facilitate transmission, parasite's behavior and reproduction has been fine tuned to maximize the likelihood of infection of a suitable host. For some species chemical cues that trigger or attract the parasite in question have been identified but how metazoan parasites themselves receive these signals remains unknown...
2017: PloS One
https://www.readbyqxmd.com/read/28573548/redescription-of-tripaphylus-musteli-van-beneden-1851-copepoda-sphyriidae-and-the-relegation-of-paeon-wilson-1919-to-synonymy-with-tripaphylus-richiardi-in-anonymous-1878
#15
George W Benz, Geoffrey A Boxshall
Tripaphylus musteli (van Beneden, 1851) (Copepoda, Siphonostomatoida, Sphyriidae) is redescribed from an adult female collected from the branchial chamber of a starry smooth-hound, Mustelus asterias Cloquet (Carcharhiniformes, Triakidae), captured in the English Channel off Portland, UK. The new account of T. musteli is the first based on a complete adult female and highlighted the lack of a robust distinction separating Tripaphylus Richiardi, in Anonymous, 1878 and Paeon Wilson, 1919 prompting us to relegate Paeon to a junior subjective synonym of Tripaphylus...
July 2017: Systematic Parasitology
https://www.readbyqxmd.com/read/28529408/wind-dispersal-results-in-a-gradient-of-dispersal-limitation-and-environmental-match-among-discrete-aquatic-habitats
#16
Zsófia Horváth, Csaba F Vad, Robert Ptacnik
Directional dispersal by wind and other dispersal agents may generate spatial patterns in passively dispersing metacommunities which cannot be detected by classical eigenvector methods based on Euclidean distances. We analysed zooplankton communities (Rotifera, Cladocera, Copepoda) in a cluster of soda pans distributed over a short spatial scale of 18 km and tested explicitly for directional signals in their spatial configuration. The study area is exposed to a prevailing northwestern wind direction. By applying asymmetric eigenvector maps (AEM), we were able to identify corresponding directionality in the spatial structure of communities...
August 2016: Ecography
https://www.readbyqxmd.com/read/28497195/olfaction-in-a-viscous-environment-the-color-of-sexual-smells-in-temora-longicornis
#17
Peter Hinow, J Rudi Strickler, Jeannette Yen
We investigate chemical aspects of mating in the marine copepod Temora longicornis (Copepoda, Calanoidea). Our emphasis is the female pheromone signaling in form of well-defined trails for males to follow, observed in Doall et al. (Phil Trans R Soc Lond B 353:681-689, 1998). The viscous environment and the properties of the odorants play important roles as the spread of the pheromone trail limits the time during which it is useful for tracing. A key observation from our earlier work is the ability of a searching male to detect the direction of the female and to correct its swimming direction if necessary...
June 2017: Die Naturwissenschaften
https://www.readbyqxmd.com/read/28441395/molecular-phylogeny-of-oncaeidae-copepoda-using-nuclear-ribosomal-internal-transcribed-spacer-its-rdna
#18
Iole Di Capua, Fulvio Maffucci, Raimondo Pannone, Maria Grazia Mazzocchi, Elio Biffali, Alberto Amato
Copepods belonging to the Oncaeidae family are commonly and abundantly found in marine zooplankton. In the Mediterranean Sea, forty-seven oncaeid species occur, of which eleven in the Gulf of Naples. In this Gulf, several Oncaea species were morphologically analysed and described at the end of the XIX century by W. Giesbrecht. In the same area, oncaeids are being investigated over seasonal and inter-annual scales at the long-term coastal station LTER-MC. In the present work, we identified six oncaeid species using the nuclear ribosomal internal transcribed spacers (ITS rDNA) and the mitochondrial cytochrome c oxidase subunit I (mtCOI)...
2017: PloS One
https://www.readbyqxmd.com/read/28431210/exotic-gill-lice-species-copepoda-lernaeopodidae-salmincola-spp-infect-rainbow-trout-oncorhynchus-mykiss-and-brook-trout-salvelinus-fontinalis-in-the-southeastern-united-states
#19
Carlos F Ruiz, Jacob M Rash, Doug A Besler, Jackson R Roberts, Micah B Warren, Cova R Arias, Stephen A Bullard
Salmincola californiensis infected 25 of 31 (prevalence 0.8; intensity 2-35 [mean 6.6 ± standard deviation 7.7; n = 25]) rainbow trout, Oncorhynchus mykiss, from a private trout farm connected to the Watauga River, North Carolina. Salmincola edwardsii infected all of 9 (1.0; 2-43 [9.3 ± 13.0; 9]) brook trout, Salvelinus fontinalis, from Big Norton Prong, a tributary of the Little Tennessee River, North Carolina. Both lernaeopodids are well-known salmonid pathogens, but neither is native to, nor has been previously taxonomically confirmed from, the southeastern United States...
August 2017: Journal of Parasitology
https://www.readbyqxmd.com/read/28331408/on-some-new-species-of-ancorabolidae-sars-1909-from-the-gulf-of-california-the-genera-ceratonotus-sars-1909-and-dendropsyllus-conroy-dalton-2003-crustacea-copepoda-harpacticoida
#20
Samuel Gómez, Karen Díaz
Two new species of two genera of the family Ancorabolidae, Ceratonotus elongatussp. n. and Dendropsyllus californiensissp. n., found at 1642 m and 1759 m depth, respectively, in the Southern Trough of Guaymas Basin, are described. Ceratonotus elongatussp. n. was attributed to that genus by a series of character states of which the lack of dendroid dorsal processes on the P6-bearing somite and the presence of such processes on the first abdominal somite were definitive. This species was observed to be very close to Ceratonotus thistlei Conroy-Dalton, 2003 from the San Diego Trough, and can be separated by a number of traits of which the elongated sensilla-bearing dorsal tubercles on the second abdominal somite in the new species was definitive...
2017: ZooKeys
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