| bothriocephalus pearsei n. sp. (cestoda: pseudophyllidea) from cenote fishes of the yucatan peninsula, mexico. | the cestode bothriocephalus pearsei n. sp. is described from the intestine of the cichlid cichlasoma urophthalmus (günther) from cenote (= sinkhole) zaci near valladolid, yucatan, mexico. the pimelodid catfish rhamdia guatemalensis günther, which also harbored conspecific cestodes, seems to represent accidental or postcyclic host of b. pearsei. the new species differs from congeners mainly by the morphology of the scolex, which is clavate, with the maximum width in its middle part, has a distinc ... | 1996 | 8885891 |
| crepidostomum percopsisi n. sp. (digenea: allocreadiidae) from the trout perch (percopsis omiscomaycus) of dauphin lake, canada. | crepidostomum percopsisi n. sp. is described from the small intestine of the trout perch (percopsis omiscomaycus) in dauphin lake, manitoba. it is morphologically similar to crepidostomum isostomum, which has been reported from the trout perch and several other species of fish. it differs from c. isostomum based on the vitellaria confined to the hindbody of the worm, size and shape of the cirrus, size of the testes, and its greater body length. a comparison of our specimens with those illustrate ... | 1997 | 9406794 |
| temporal trends of young-of-year fishes in lake erie and comparison of diel sampling periods. | we explored temporal trends of young-of-year (yoy) fishes caught in bottom trawl hauls at an established offshore monitoring site in lake erie in fall during 1961-2001. sampling was conducted during morning, afternoon, and night in each year. catches per hour (cph) of alewife (alosa pseudoharengus) yoy were relatively low and exhibited no temporal trend. this result was consistent with the species' intolerance to lake erie's adverse winter water temperatures. gizzard shad (dorosoma cepedianum) y ... | 2007 | 16957842 |
| morphological and molecular comparison of myxobolus procerus (kudo, 1934) and m. intramusculi n. sp. (myxozoa) parasitising muscles of the trout-perch percopsis omiscomaycus. | inter- and intracellular cysts from a presumed single species, myxobolus procerus (kudo, 1934), parasitising the trout-perch percopsis omiscomaycus were compared with respect to their spore morphology and small subunit 18s ribosomal dna. the two cyst types have similar pyriform spores and comparable ranges in spore length and width, size of the polar capsules and number of filament coils. however, fixed spores of the intracellular cysts are significantly shorter (p<0.05) in mean length than thos ... | 2005 | 15980965 |