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Effects Of Space Shuttle Exhaust Plumes On Gills Of Some Estuarine Fishes: A Light And Electron Microscopic Study, William E. Hawkins, Robin M. Overstreet, Mark J. Provancha
Effects Of Space Shuttle Exhaust Plumes On Gills Of Some Estuarine Fishes: A Light And Electron Microscopic Study, William E. Hawkins, Robin M. Overstreet, Mark J. Provancha
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
The first few launches of the space shuttle resulted in fish kills in a lagoon near the launch site. To study this phenomenon further, sheepshead minnow (Cyprinodon variegatus), sailfin molly (Poecilia latipinna), and mosquitofish (Gambusia affinis) were exposed to the exhaust plume in buckets placed near the launch site. An open bucket provided a full exposure, a partly closed one provided an intermediate exposure, and a closed one was the control. Three h after launch, the pH of the water from the full exposure had decreased from about 7 to about 3, Al and …
In Memoriam: Konstantin Minaevich Ryzhikov, 1912-1983, Robert L. Rausch
In Memoriam: Konstantin Minaevich Ryzhikov, 1912-1983, Robert L. Rausch
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
Obituary of Konstantin Minaevich Ryzhikov, 1912-1983.
A New Gall-Forming Species Of Anguina Scopoli, 1777 (Nemata: Anguinidae) On Bluegrass, Poa Annua L., From The Coast Of California, I. Cid Del Prado Vera, Armand R. Maggenti
A New Gall-Forming Species Of Anguina Scopoli, 1777 (Nemata: Anguinidae) On Bluegrass, Poa Annua L., From The Coast Of California, I. Cid Del Prado Vera, Armand R. Maggenti
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
Anguina pacificae n. sp. is described and illustrated from stem galls on bluegrass, Poa annua L., from golf courses along coastal California. The females are characterized by constrictions in the anterior and posterior connections of the isthmus with the respective parts of the esophagus, the long multicellular columella, and the sharply pointed tail tip. Males are dorsally curved after death; body width is increased markedly after 13 annuli in both sexes, and the tail is conical and with an acute terminus.
Discobothrium Caribbensis Sp. N., A Lecanicephalidean Cestode From A Yellow-Spotted Stingray, Urolophus Jamaicensis, In Jamaica, Scott Lyell Gardner, Gerald D. Schmidt
Discobothrium Caribbensis Sp. N., A Lecanicephalidean Cestode From A Yellow-Spotted Stingray, Urolophus Jamaicensis, In Jamaica, Scott Lyell Gardner, Gerald D. Schmidt
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
Discobothrium caribbensis sp. n. (Lecanicephalidea) is described from the spiral valve of the yellow- spotted stingray, Urolophus jamaicensis from Jamaica. The new species is the only member of the genus described with four testes. It is most similar in number of testes to D. japonicum Yamaguti, 1934, which has six testes and a myzorhynchus. A myzorhynchus is absent in D. caribbensis.
Alcataenia Pygmaeus Sp. N. (Cestoda: Dilepididae) From The Whiskered Auklet, Aethia Pygmaea, In The Western Aleutian Islands, Alaska, With A Comment On The Genera Alcataenia And Rissotaenia, Eric P. Hoberg
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
Alcataenia pygmaeus sp. n. is described from whiskered auklets, Aethia pygmaea (Gmelin), from the western Aleutian Islands, Alaska. It is distinguished from its congeners by the overall small size of the strobila and a combination of other characters. The rostellum is armed with 34-38 hooks that measure 41-49 µm in length. The cirrus sac is relatively short, 101-174 µm in length, and reaches or just crosses the poral osmoregulatory canals. There are 36-50 testes located entirely posterior to the female organs. The scolex is deeply embedded in the mucosal tissue of the duodenum of the host. This is the first …
The Taxonomic Status Of Echinococcus Cruzi Brumpt And Joyeux, 1924 (Cestoda: Taeniidae) From An Agouti (Rodentia: Dasyproctidae) In Brazil, Robert L. Rausch, A. D'Alessandro, M. Ohbayashi
The Taxonomic Status Of Echinococcus Cruzi Brumpt And Joyeux, 1924 (Cestoda: Taeniidae) From An Agouti (Rodentia: Dasyproctidae) In Brazil, Robert L. Rausch, A. D'Alessandro, M. Ohbayashi
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
Paratype material of Echinococcus cruzi Brumpt and Joyeux, 1924, described from an agouti, Dasyprocta leporina (L.), in Brazil, was compared with Echinococcus oligarthrus (Diesing, 1863), of which the larval stage occurs also in agoutis and other rodents in South America and Central America. Comparisons of the larval cestodes (metacestodes) showed that the rostellar hooks from protoscolices of the two taxa corresponded in form, and their slightly greater lengths in E. cruzi were considered to be of no taxonomic significance. They agreed as well in other morphological characteristics. Echinococcus cruzi was compared also with the other neotropical species, E. vogeli Rausch …
Ultrastructure Of The Interface Between Stages Of Eimeria Funduli (Apicomplexa) And Hepatocytes Of The Longnose Killifish, Fundulus Similis, William E. Hawkins, John W. Fournie, Robin M. Overstreet
Ultrastructure Of The Interface Between Stages Of Eimeria Funduli (Apicomplexa) And Hepatocytes Of The Longnose Killifish, Fundulus Similis, William E. Hawkins, John W. Fournie, Robin M. Overstreet
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
The interface between stages of Eimeria funduli and hepatocytes of the experimentally infected killifish Fundulus similis was studied ultrastructurally. Parasitophorous vacuoles (PV's) in which meronts, macrogamonts, and microgamonts developed were lined by an inner, smooth membrane and an outer, ribosome-studded membrane. The outer membrane bordered on the cytoplasm of the host cell, whereas the inner one limited the PV. The origins of these membranes have not been determined with certainty, but images were observed in which both membranes appeared to be continuous with the outer nuclear membrane of the host cell. Furthermore, the outer PV membrane was continuous with membranes …
Review Of Concepts In Nematode Systematics: Proceedings Of An International Symposium Held Jointly With The Association Of Applied Biologists, By A.R. Stone, H.M. Platt, L.F. Khalil And D.L. Hawksworth (Academic Press, 1983), Daniel R. Brooks
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
Review of Concepts in Nematode Systematics: Proceedings of an International Symposium held jointly with the Association of Applied Biologists, in Cambridge, September 2-4, 1981, by A.R. Stone, H.M. Platt, L.F. Khalil and D.L. Hawksworth (Academic Press, 1983).
Morphometrical Variability In Helicotylenchus Steiner, 1945. 4 : Study Of Field Populations Of H. Pseudorobustus And Related Species, Renaud Fortuner, Armand R. Maggenti, Laurel M. Whittaker
Morphometrical Variability In Helicotylenchus Steiner, 1945. 4 : Study Of Field Populations Of H. Pseudorobustus And Related Species, Renaud Fortuner, Armand R. Maggenti, Laurel M. Whittaker
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
Multivariate analyses were made on 28 populations of Helicotylenchus pseudorobustus, eleven populations of H. dihystera, and type populations of H. microlobus, H. bradys, H. phalerus, H. egyptiensis, and H. africanus. Some morphological differences were observed among the populations of H. pseudorobustus, mostly between samples from North America and from Western Europe. The differences were most apparent in the pattern of junction of the inner lines of lateral field on tail, the position of the phasmids and of the dorsal gland opening. However, these characters vary within some of the populations studied. Most populations originally identified …
Angularella Audubonensis Sp. N. (Dilepididae) And Other Cestodes Of Cliff Swallows In Colorado, Jeffrey D. Stamper, Gerald D. Schmidt
Angularella Audubonensis Sp. N. (Dilepididae) And Other Cestodes Of Cliff Swallows In Colorado, Jeffrey D. Stamper, Gerald D. Schmidt
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
One hundred forty-five cliff swallows, Petrochelidon pyrrhonota, were examined for cestodes in two separate surveys in Weld County, Colorado. Seven species representing four genera were found. Angularella audubonensis sp. n. is differentiated by the small size of the rostellar hooks (8.4-13.5 μm) and the medial relationship of the cirrus pouch to the osmoregulatory canals. Other species collected were Angularella beema, Anonchotaenia globata, Mayhewia ababili, Vitta magniuncinata, Vitta parvirostris and Vitta riparia. Seven new hosts and geographic distribution records were established for Colorado, and six new records were determined for North America.
Angularella Audubonensis Sp. N. (Dilepididae) And Other Cestodes Of Cliff Swallows In Colorado, Jeffery D. Stamper, Gerald D. Schmidt
Angularella Audubonensis Sp. N. (Dilepididae) And Other Cestodes Of Cliff Swallows In Colorado, Jeffery D. Stamper, Gerald D. Schmidt
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
One hundred forty-five cliff swallows, Petrochelidon pyrrhonota, were examined for cestodes in two separate surveys in Weld County, Colorado. Seven species representing four genera were found. Angularella audubonensis sp. n. is differentiated by the small size of the rostellar hooks (8.4-13.5 µm) and the medial relationship of the cirrus pouch t.o the osmoregulatory canals. Other species collected were Angularella beema, Anonchotaema globata, Mayhewia ababili, Vitta magniuncinata, Vitta parvirostris and Vitta riparia. Seven new hosts and geographic distribution records were established for Colorado, and six new records were determined for North America.
Helminth Parasites Of The Endangered Houston Toad, Bufo Houstonensis Sanders, 1953 (Amphibia, Bufonidae), Robert A. Thomas, Steven A. Nadler, W. Lynn Jagers
Helminth Parasites Of The Endangered Houston Toad, Bufo Houstonensis Sanders, 1953 (Amphibia, Bufonidae), Robert A. Thomas, Steven A. Nadler, W. Lynn Jagers
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
The Houston toad, Bufo houstonensis Sanders, has an extremely restricted range in southeastern Texas, being known historically from 6 counties with viable populations remaining in only 2, Due to its relative rarity and federally protected status as an endangered species, its parasites have received attention only once. Harwood (1932, Proc. U.S. Natl Mus. 81: 1-71) identified 2 Harris County specimens of this toad as B. terrestris and reported Cosmocercoides dukae (Oxyuridae) in both and Oswaldocruzia pipiens (Diaphanocephalidae) in 1. In the course ofecological studies on the Houston toad, additional information on its parasitic helminths has been acquired.
Postembryonic Development Of The Redwood Nematode, Rhizonema Sequoiae (Nemata: Heteroderidae), I. Cid Del Prado Vera, Armand R. Maggenti, B. F. Lownsbery
Postembryonic Development Of The Redwood Nematode, Rhizonema Sequoiae (Nemata: Heteroderidae), I. Cid Del Prado Vera, Armand R. Maggenti, B. F. Lownsbery
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
Second-stage larvae of Rhizonema sequoiae Cid del Prado Vera et al. developed into adult females in 6 months or adult males in 3-4 months on roots of Sequoia sempervirens maintained in a growth chamber at 16 C with a 12-hour light period. Under these conditions the second-stage larvae increased in diameter, the central cells of the genital primordium increased in size, and their nuclei enlarged. Mesenchymal cells accumulated in the esophageal and tail regions. Second-stage larvae become third-stage males or females 2 months after inoculation of redwood roots. Their sex could be distinguished by the ratio of length to width …
Taxonomy Of North American Fish Eimeriidae, Steve J. Upton, David W. Reduker, William L. Current, Donald W. Duszynski
Taxonomy Of North American Fish Eimeriidae, Steve J. Upton, David W. Reduker, William L. Current, Donald W. Duszynski
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
Taxonomic descriptions, line drawings, and references are given for the 30 named and 5 unnamed species of North American fish Eimeriidae. In addition, a key was developed based on available morphologic data to distinguish between similar species. Taxa are divided into two genera: Eimeria (27 species) which are tetrasporocystic with dizoic, nonbivalved sporocysts, and Goussia,/i> (3 species) which are tetrasporocystic with dizoic, bivalved sporocysts that lack Stieda bodies and have sporocyst walls composed of two longitudinal valves.
Alcataenia Campylacantha (Krabbe, 1869) From Pigeon Guillemots, Cepphus Columba Pallas, And Black Guillemots, Cepphus Grylle (Linnaeus), And Alcataenia Sp. Indet. (Cestoda: Dilepididae) From Kittlitz's Murrelets, Brachyramphus Brevirostris (Vigors) In Alaska, Eric P. Hoberg
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
Alcataenia campylacantha (Krabbe, 1869) is redescribed and reported for the first time from pigeon guillemots, Cepphus columba Pallas, in Alaska. Specimens of this cestode were also found in black guillemots, Cepphus grylle (Linnaeus) at Point Barrow, Alaska. There were no substantial differences in morphological characters between populations of this cestode from the North Atlantic and North Pacific basins. Additionally, Alcataenia sp. indet. is reported, with a partial description, from Kittlitz's murrelets, Brachyramphus brevirostris (Vigors), in Alaska. This constitutes the first record of dilepidid cestodes from birds of the genus Brachyramphus Brandt.
French abstract:
On trouvera ici une nouvelle description d’ …
Alcataenia Longicervica Sp. N. From Murres, Uria Lomvia (Linnaeus) And Uria Aalge (Pontoppidan) In The North Pacific Basin, With Redescriptions Of Alcataenia Armillaris (Rudolphi, 1810) And Alcataenia Meinertzhageni (Baer, 1956) (Cestoda: Dilepididae), Eric P. Hoberg
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
Alcataenia longicervica sp. n. (Cestoda: Dilepididae) is described from murres, Uria spp., in Alaska and other localities in the Pacific basin. From Alcataenia armillaris (Rudolphi, 1810), which it most closely resembles, A. longicervica is distinguished by larger size of organs (cirrus sac, vitelline gland, and seminal receptacle), greater number of testes, and extremely long neck. In specimens of A. longicervica there are 22-27 rostellar hooks distributed in two rows. Hooks in the anterior row measure 41-49 μm in length while those in the posterior are 38-48 μm. Two species of Alcataenia, A. armillaris and A. meinertzhageni (Baer, 1956), both …
Trematode Parasites Of Marine Birds In Antarctica: The Distribution Of Gymnophallus Deliciosus (Olsson 1893), Eric P. Hoberg
Trematode Parasites Of Marine Birds In Antarctica: The Distribution Of Gymnophallus Deliciosus (Olsson 1893), Eric P. Hoberg
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
During continuing studies of avian helminths at Palmer Station, Antarctica (Hoberg 1983) trematodes were found as parasites only of charadriiform birds. Digeneans were not represented in extensive collections (including several thousand specimens of helminths) from spheniscids, procellariids, and phalacrocoracids.
The pattern of distribution of trematodes in marine birds in Antarctica is influenced by the availability of suitable intermediate hosts (mollusca) and the foraging behavior of potential final hosts. Littoral environments near Palmer are structurally simple and of low diversity due to ice scouring. The limpet, Nacella polaris, is the dominant intertidal invertebrate and one of the few molluscs that …