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Environmental Heterogeneity, Genetic-Polymorphism, And Reproductive Strategies, M. J. Mcleod, Daniel J. Hornbach, S. I. Guttman, C. M. Way, Albert J. Burky
Environmental Heterogeneity, Genetic-Polymorphism, And Reproductive Strategies, M. J. Mcleod, Daniel J. Hornbach, S. I. Guttman, C. M. Way, Albert J. Burky
Albert J. Burky
No abstract provided.
Effect Of Water Removal On Introduced Caddisflies From A Tropical Mountain Stream, M. D. Mcintosh, Mark Eric Benbow, Albert J. Burky
Effect Of Water Removal On Introduced Caddisflies From A Tropical Mountain Stream, M. D. Mcintosh, Mark Eric Benbow, Albert J. Burky
Albert J. Burky
Tropical island streams worldwide are being threatened by existing or proposed dams and diversions. Numerous streams of the Hawaiian Islands have diversions that remove freshwater for human use; however, little research has addressed diversion effects on aquatic insect communities in tropical streams. We studied the effect of water removal by a stream diversion on density and biomass of two introduced Trichoptera, Cheumatopsyche analis (Banks) (Hydropsychidae) and Hydroptila potosina (Buenoa- Soria) (Hydroptilidae), in Iao Stream, Maui, Hawaii, from April-August 2000. Both species seem to have multivoltine life cycles. Pooled Trichoptera (both species) biomass was significantly greater above the diversion (178.3 mg.m-2 …
Comparison Of Carbon And Nitrogen-Content Of Infected And Uninfected Snails, Succinea-Ovalis, And The Trematode Leucochloridium-Variae, Albert J. Burky, Daniel J. Hornbach
Comparison Of Carbon And Nitrogen-Content Of Infected And Uninfected Snails, Succinea-Ovalis, And The Trematode Leucochloridium-Variae, Albert J. Burky, Daniel J. Hornbach
Albert J. Burky
In June, 6.7% of adult Succinea ovalis collected near Urbana, Ohio, were infected with the trematode, Leucochloridium variae. The effects of parasitism were assessed as total organic carbon (equivalent to calorific values) and as total nitrogen. The parasite represents 23.8% of total (parasite + snail tissue) dry tissue weight, 21.4% of total carbon and 19.8% of total nitrogen of infected snails. The higher C:N ratio for parasite tissue indicates a higher proportion of nonproteinaceous compounds (e.g., fats and/or carbohydrates) as compared to host tissue. There is less snail tissue in parasitized S. ovalis. The C:N ratios for parasitized and nonparasitized …
Life Cycle Of A Torrenticolous Hawaiian Chironomid (Telmatogeton Torrenticola): Stream Flow And Microhabitat Effects, Mark Eric Benbow, Albert J. Burky, C. M. Way
Life Cycle Of A Torrenticolous Hawaiian Chironomid (Telmatogeton Torrenticola): Stream Flow And Microhabitat Effects, Mark Eric Benbow, Albert J. Burky, C. M. Way
Albert J. Burky
In this study we documented the instar densities and life cycle of Telmatogeton torrenticola Terry (Chironomidae : Telmatogetoninae) from Kinihapai Stream, Maui, Hawaii. Greatest larval densities of this midge are found on substrates of high velocity, shallow flows of cascades, and splash zones of waterfalls, with lower densities in riffles. In the summer of 1994 we compared the effects of two microhabitats (termed optimal and suboptimal) on inter-instar density and relative abundance. In a second year (1995), we evaluated the effect of long-term reduced stream flow on these variables only in optimal microhabitats. A significant reduction in stream flow from …