Browsing by Author "CARVAJAL, J"
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- ItemA STUDY OF THE ANISAKID INFECTION IN THE CHILEAN HAKE, MERLUCCIUS-GAYI (GUICHENOT, 1848)(1985) CARVAJAL, J; CATTAN, PEVariation in the prevalence and intensity of infection of fishes by larval anisakids was examined in 360 hake (Meluccius gayi) caught off central Chile. Each month, from April 1979 to March 1980, 30 hake were taken from commercial catches and stored on ice for dissection and examination on arrival at port. Anisakis simplex was found in 90.5% of the hake and Phocanema spp. in 10.83%. No seasonal variation in the prevalence of A. simplex was observed in females.
- ItemCRITICAL-STUDIES ON THE GENUS CALLITETRARHYNCHUS (CESTODA, TRYPANORHYNCHA) WITH RECOGNITION OF RHYNCHOBOTHRIUM-SPECIOSUM LINTON, 1897 AS A VALID SPECIES OF THE GENUS CALLITETRARHYNCHUS(1985) CARVAJAL, J; REGO, AACallitetrarhynchus speciosus (Linton, 1897) n. comb. for Rhynchobothrium speciosum is redescribed from Pomatomus saltatrix and is compared with the only other species of the genus, C. gracilis (Rudolphi, 1819), also found in the same fish. The arrangement of hooks on the tentacle of both species is illustrated. The two species, which have been included under the name C. gracilis in the past, differ mainly in the oncotaxy, different shape of the hooks of the chainette, distinct distribution of frontal glands and in the different depth of the marginal bothidial groove.
- ItemDESCRIPTION OF ADULT AND LARVA OF CAULOBOTHRIUM-MYLIOBATIDIS-SP-N (CESTODA-TETRAPHYLLIDEA) FROM CHILE(1977) CARVAJAL, JLarval cestodes identified as members of the genus Caulobothrium Baer 1948, were observed in the intestine of the Chilean clam Mesodesma donacium Lamarck. Several bat stingrays, Myliobatis chilensis Philippi, subsequently recovered in the same areas, were infected with a new species of tapeworm, C. myliobatidis, which is described. The probable life cycle of the parasite is discussed.
- ItemECHINOBOTHRIUM-EUZETI, A NEW CESTODE FROM THE SPIRAL VALVE OF A CHILEAN ELASMOBRANCH(1980) CAMPBELL, RA; CARVAJAL, JE. euzeti sp. nov. is described from the skate Psammobatis lima (Poeppig, 1835) taken in coastal waters off Constitucion, Chile. The species is distinguished from others in the genus by attaining a size of 5.5 cm, rostellar armature of 25 large hooks flanked by 6-7 hooklets/side, 100-107 spines/row on the cephalic peduncle, 37-42 testes mature segment and smooth ovarian lobes. The new species is compared with E. longicolle Southwell 1925 and E. mathiasi Euzet, 1951.
- ItemHELICONEMA-PSAMMOBATIDUS SP-N (NEMATODA, PHYSALOPTERIDAE) FROM A SKATE, PSAMMOBATIS-LIMA (CHONDRICHTHYES, RAJIDAE), TAKEN IN CHILE(1984) THRELFALL, W; CARVAJAL, JH. psammobatidus sp. nov. is described from a skate, P. lima, taken in Chile. This nematode is distingusihed from its closest relatives in the genus (H. heliconema, H. brevispiculum) by the number of tesellated longitudinal ridges in the male (14, as opposed to 20), the spicule ratio (1:4.2, as opposed to 1:20 or 1:2.4), and the protruding conical vulva of the female.
- ItemHELMINTH PARASITES OF RHINOBATOS-PLANICEPS GARMAN 1880, INCLUDING 2 NEW SPECIES OF CESTODES, WITH COMMENTS ON HOST SPECIFICITY OF GENUS RHINEBOTHRIUM LINTON 1890(1976) DAILEY, MD; CARVAJAL, JRhinebothrium rhinobati sp. nov. and Prochristianella heteracantha sp. nov. are described from the skate, Rhinobatos planiceps Garman 1880 from Chile. New host records and locations are reported for Acanthobothrium olseni Dailey and Mudry 1969, Parachristianella monomegacantha Kruse 1959, and Proleptus acutus Dujardin 1845. The genus Rhinebothrium is reported from the host family Rhinobatidae for the 1st time and the host specificity of the genus Rhinebothrium to the Myliobatidae is discussed.
- ItemLARVAL ANISAKIDS AND OTHER HELMINTHS IN THE HAKE, MERLUCCIUS-GAYI (GUICHENOT) FROM CHILE(1979) CARVAJAL, J; CATTAN, PE; CASTILLO, C; SCHATTE, PA total of 120 hake (M. gayi) caught off central Chile were examined for helminth parasites. Sixty hake kept in ice from the catch of a trawler were examined on arrival at port, while the other 60 hake were dissected on board immediately after collection. Of the hake collected, 91% were infected with 1 or more species of the following helminths: trypanorhynch plerocerci of Grillotia dollfusi Carvajal, 1971; adult worms of the genus Clestobothrium; and larval nematodes of the genera Anisakis and Phocanema; Of the hake examined, 86% were infected with Anisakis sp. and 42.5% with Phocanema sp. Infection with larval nematodes increased with length of the fish and there was a greater incidence of infection among the females. There was a greater frequency of occurrence of the parasites in the viscera than in the musculature.
- ItemLARVAL TRYPANORHYNCH CESTODES FROM PERUVIAN TELEOST FISHES, WITH DESCRIPTIONS OF 2 NEW SPECIES(1984) ESCALANTE, H; CARVAJAL, JExamination of 60 teleost fishes (9 spp.) for cestodes from the Southeastern Pacific Ocean off Paita (5.degree.7''S, 81.degree.11''W) and Salaverry (8.degree.15''S, 78.degree.59''W) Peru, resulted in the recovery of eight species of trypanorhynchs, two of which are new. The new species are Pterobothrium acanthotruncatum and Pseudogrillotia peruviana. New host and distribution records are: Dasyrhynchus pacificus Robinson in Sciaena deliciosa (Tschudi); Poecilancistrium caryophyllum (Diesing) from S. gilberti Abbott; Floriceps saccatus Cuvier from Centropomus nigrescens Gunther; Tentacularia coryphaena Bosc from Coryphaena hippurus Linnaeus, Katsuwonus pelamis (Linnaeus) and Centropomus nigrescens: Callitetrarhynchus gracilis (Rudolphi) in S. deliciosa, Polyclemus peruanus (Steindachner) and Hemilutjanus macrophtalmos (Tschudi); Lacistorhynchus tenuis (Van Beneden) from Odontesthes regia (Humboldt).
- ItemLOBATOSTOMA-ANISOTREMUM NEW SPECIES, (TREMATODA, ASPIDOGASTREA), PARASITIC IN THE TELEOST FISH ANISOTREMUS-SCAPULARIS FROM CHILE(1984) OLIVA, M; CARVAJAL, JL. anisotremum sp. nov. (Trematoda: Aspidogastrea), a monogenetic trematode from the intestine of the marine teleost A. scapularis (common name Sargo), caught off Antofagasta, Chile, is described. Distinctive characteristics of the species are: ventral disk with 130 alveoli, of which 32 are central and 66 marginal; testis located at posterior third of body. Vitellaria folicular extended from the middle of the disc up to the posterior end, at level of testis. This is the first report of the genus from the southeastern Pacific Ocean. A key to the species of the genus Lobatostoma is provided.
- ItemOGMOGASTER-HEPTALINEATUS N-SP (TREMATODA, NOTOCOTYLIDAE) FROM THE CHILEAN SEA LION OTARIA-FLAVESCENS(1983) CARVAJAL, J; DURAN, LE; GEORGENASCIMENTO, MO. heptalineatus nov. is described from the Chilean sea lion Otaria flavescens. Distinct characteristics of the species are: presence of 7 longitudinal ridges on the ventral surface, cirrus armed with scales, testes and ovary deeply lobed and eggs circular with short polar filaments. This is the 1st report of Ogmogaster from South America and the 1st report of Otaria flavescens as a host for this genus.
- ItemPHYLLOBOTHRIUM-DISCOPYGI N-SP (CESTODA, TETRAPHYLLIDEA) FROM CHILE, WITH A CRITICAL COMPARISON OF THE AFFINITIES OF PHYLLOBOTHRIUM-AURICULA VANBENEDEN, 1858 AND PHYLLOBOTHRIUM-FOLIATUM LINTON, 1890(1987) CAMPBELL, RA; CARVAJAL, JPhyllobothrium discopygi n. sp. is described from the spiral valve of Discopyge tschudi Heckel, 1846 (Torpedinidae) taken in the Pacific Ocean off Coquimbo, San Antonio and Antofagasta, Chile. Specimens are described from whole-mounts, sections and SEM. Phyllobothrium discopygi is distinguished from other tetraphyllidean cestodes of the genus Phyllobothrium van Beneden, 1849 by a bifurcate scolex with bothridia joined in pairs, short neck, testes number and distribution, and morphology of the vitelline follicles and ovary. Phyllobothrium foliatum Linton, 1890 is considered a junior synonym of P. auricula van Beneden, 1856 following comparisons of P. auricula from D. pastinaca, Linton''s holotype of P. foliatum from D. centroura and fresh specimens from D. centroura taken in waters near Woods Hole, Massachusetts [USA]. A meristic comparison of the adult worms is presented.
- ItemREVISION OF SOME TRYPANORHYNCHS FROM WESTERN NORTH-ATLANTIC DESCRIBED BY LINTON,E(1975) CAMPBELL, RA; CARVAJAL, J
- ItemSOME TRYPANORHYNCH CESTODES FROM HAWAIIAN FISHES, WITH DESCRIPTIONS OF 4 NEW SPECIES(1976) CARVAJAL, J; CAMPBELL, RA; CORNFORD, EM
- ItemSYNONYMY OF THE PHYLLOBOTHRIID GENERA RHODOBOTHRIUM LINTON, 1889, INERMIPHYLLIDIUM RISER, 1955, AND SPHAEROBOTHRIUM EUZET, 1959 (CESTODA, TETRAPHYLLIDEA)(1979) CAMPBELL, RA; CARVAJAL, JA comparison of whole mounted and sectioned specimens of Rhodobothrium, Inermiphyllidium and Sphaerobothrium from the type hosts was made and their validity assessed. The genus Rhodobothrium Linton, 1889 is emended and considered to be the senior synonym of the latter genera. Detailed description of R. pulvinatum Linton, 1889 is given based on material from the type host, Dasyatis centroura (Mitchill), and the new host D. americana Hildebrand and Schroeder. R. lubeti comb. nov. (Euzet, 1959) [ex. S. lubeti] and R. brachyascum comb. nov. (Riser, 1955) [ex. I. brachyascum] are included in the genus. The adult and plerocercus of another species new to the genus, R. mesodesmatum comb. nov. (Bahamonde and Lopez), [ex. Anthobothrium peruanum and Proboscidosaccus mesodesmatis] is described from Myliobatis chilensis Philippi, and the clam Mesodesma donacium Lamarck, taken in Chilean coastal waters.