| guild structure of larval trematodes in the snail helisoma anceps: patterns and processes at the individual host level. | factors that influenced the infracommunity structure of trematodes parasitizing the pulmonate snail helisoma anceps were studied over a 15-mo period; the guild included 8 species of parasites. infracommunities were depauperate, with double patent infections observed in only 7 of 1,485 infected snails; a total of 4,899 was examined. halipegus occidualis-haematoloechus longiplexus was the most common dual infection. both species share the same definitive host and, in both cases, eggs are the infec ... | 1991 | 1865259 |
| behavioral basis of second intermediate host specificity among four species of haematoloechus (digenea: haematoloechidae). | cercarial behavior patterns were examined in 4 species of frog lung flukes (haematoloechus spp.). cercariae of haematoloechus complexus, haematoloechus medioplexus, haematoloechus longiplexus, and haematoloechus varioplexus were exposed to 3 species of experimental arthropods and an inanimate control. the number of cercariae attached to an experimental host at 5 min postexposure was recorded. haematoloechus longiplexus and h. complexus cercariae attached to experimental hosts at higher rates tha ... | 1996 | 8627509 |
| differentiation of mexican species of haematoloechus looss, 1899 (digenea: plagiorchiformes): molecular and morphological evidence. | molecular evidence is interpreted in the light of morphology to examine the validity of several species of haematoloechus described as mexican endemics. internal transcribed spacers 1 and 2 and 28s ribosomal genes were sequenced for 11 isolates. phylogenetic analysis of separate partitions and combined databases was conducted. results were analyzed, in the light of morphological evidence. haematoloechus macrorchis is proposed as a junior synonym of haematoloechus longiplexus. haematoloechus pulc ... | 1999 | 10577731 |
| evolutionary avenues for, and constraints on, the transmission of frog lung flukes (haematoloechus spp.) in dragonfly second intermediate hosts. | metacercariae survival patterns and their distribution in second intermediate odonate hosts were examined for 4 species of frog lung flukes. surveys of aquatic larvae and recently emerged teneral dragonflies and damselflies indicated that prevalence and mean abundance of haematoloechus spp. metacercariae were significantly lower in teneral dragonflies than larval dragonflies, while there was no significant difference in prevalence or mean abundance of haematoloechus spp. metacercariae among larv ... | 2007 | 17626352 |
| catastrophic collapse of the larval trematode component community in charlie's pond (north carolina). | in 1984, work on the parasite population and community ecology in the pulmonate snail, helisoma anceps , was initiated in charlie's pond (north carolina). similar research on physa gyrina was started in 1986. when study in the pond began in 1984, 8 species of larval trematodes were being shed from hel. anceps. by far, the dominant species was halipegus occidualis , with prevalences generally ∼60%, except during midsummer, when older snails were dying. for the other 7 trematode species being shed ... | 2015 | 25313595 |
| introduced bullfrogs and their parasites: haematoloechus longiplexus (trematoda) exploits diverse damselfly intermediate hosts on vancouver island. | the lung fluke, haematoloechus longiplexus, is the most prevalent and abundant parasite of introduced bullfrogs on vancouver island, british columbia, canada. the ecological success of this trematode in invasive bullfrogs is related to the fluke's ability to utilize native intermediate hosts for transmission. the purpose of this study was to identify the odonate (dragonfly/damselfly) species involved in the transmission of h. longiplexus to the introduced bullfrog. the prevalences and mean inten ... | 2013 | 22924931 |