Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 14 of 14 for “"Leeches"”.
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Biology and Impacts of Leech Infestation in Largemouth Bass (Micropterus Salmoides) in Back Bay, Virginia
… a brackish ecosystem with salinity of 2004, leeches have been observed in the oral cavities of Largemouth Bass (<em>Micropterus</em> <em>salmoides</em>) in Back Bay. Leeches (<em>Myzobdella lugubris</em>) have previously been documented in the oral cavities of largemouth bass in the Currituck …
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The Influence of Environmental Conditions and Co-Occurring Parasites on Blood Physiology in Eastern Hellbenders (<i>Cryptobranchus alleganiensis</i>)
… and have frequent encounters with parasitic leeches (<i>Placobdella appalachiensis</i>) that transmit hematophagous endoparasites (Trypanosoma sp.), often resulting in coinfection. Results indicate that hematocrit and hemoglobin increase in response to acute stress and with temperature. …
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Mitochondrial genomics and northwestern Atlantic population genetics of marine annelids
… Clymenella torquata) supports the placement of leeches and oligochaetes within the polychaete radiation, in keeping with molecular evidence and morphological reinvestigations. This re-interpretation, first proposed by others, synonomizes "Annelida" and "Polychaeta", and lends further support to …
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Parasitic and symbiotic character relationships in the novels of Nathaniel Hawthorne
… bond is distinguished by the parasite who leeches from and often destroys the host. The symbiotic pairing exists between two characters when a reciprocal exchange of services occurs so that both characters profit and depend upon each other for a meaningful existence. These two relationships …
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Multimodal Strategies of Host-Seeking Mosquitoes
… choices, from mammals to cold-blooded frogs to leeches and earthworms, and the algorithms they use to weigh sensory host cues likely vary just as much. Our results illustrate how such weighting is performed in one species, providing a first glimpse into how general and contingent cues are …
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Mitochondrial genomics and Northwestern Atlantic population genetics of marine annelids
… Clymenella torquata) supports the placement of leeches and oligochaetes within the polychaete radiation, in keeping with molecular evidence and morphological reinvestigations. This re-interpretation, first proposed by others, synonomizes "Annelida" and "Polychaeta", and lends further support to …
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A toxicological analysis of the cyanotoxin β-methylamino-L-alanine at multiple neural levels and identification of novel modes of activity
… Previous in vitro studies using mice, rats and leeches have shown that BMAA acts predominantly on motor neurons. Observed increases in the generation of reactive oxygen species (ROS) and Ca2+ influx, coupled with disruption to mitochondrial activity and general neuronal death, indicate that the …
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Effects of Phorate on Ducklings, Macroinvertebrates, and Microtox in Northern Prairie Wetlands
… amphipods and chironomids throughout the study. Leeches and snails were resistant to phorate concentrations and had no significant mortality. Index netting indicated that few living macroinvertebrates were present in mesocosms after phorate treatment and populations recovered only slightly after …
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Evaluating alternative macroinvertebrate sampling methodologies in wetlands: Influence of sieve mesh size on relationships between environmental and assemblage variables
… every wetland (planorbid snails, oligochaetes, leeches, chironomid midges; TTR-PEOC) was positively correlated with plant cover and negatively correlated with turbidity and fish biomass. Use of a 2-mm, 4-mm, or 6-mm mesh sieve reduced sample volume by 19-35% and time required to separate …
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Relationships Among Aquatic Macroinvertebrates, Endangered Waterbirds, and Macrophytes in Taro Lo'I At Hanalei National Wildlife Refuge, Kauai, Hawaii
… snails), Chironomidae (midges), Glossiphoniidae (leeches), Lymnaeidae (pond snails), Oligochaeta (aquatic worms), Sphaeriidae (fingernail clams), and Thiaridae (thiarid snails) were the most prolific invertebrate taxa among taro loi in sweep net samples in 2005. Freshly flooded loi during and …
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Sampling Techniques for Juvenile Pallid Sturgeon and the Condition and Food Habits of Sturgeon in the Missouri River Below Fort Randall Dam, South Dakota
… hoop net sets, or on 224 set lines baited with leeches Nephelopsis obscura. Coefficient of variation (CV = 100 X SD/mean) on the monthly mean CPUE values ranged from 324 to 670 for gill nets, 263 to 949 for trammel nets, and 508 to 1630 for set lines. Seasonal trends in mean CPUE were found as …