Community and Evolutionary Ecology of North American Stream Fishes

Copeia ◽  
1988 ◽  
Vol 1988 (4) ◽  
pp. 1097 ◽  
Author(s):  
Kurt D. Fausch ◽  
William J. Matthews ◽  
David C. Heins
Keyword(s):  
North American ◽  
Evolutionary Ecology ◽  
Stream Fishes

Home Range Estimates for Three North American Stream Fishes

Copeia ◽  
1987 ◽  
Vol 1987 (2) ◽  
pp. 376 ◽  
Author(s):  
Jennifer Hill ◽  
Gary D. Grossman
Keyword(s):  
Home Range ◽  
North American ◽  
Stream Fishes

Alteration of buoyancy by some Central American stream fishes, and a comparison with North American species

1976 ◽  
Vol 54 (3) ◽  
pp. 386-391 ◽  
Author(s):  
John H. Gee ◽  
Phyllis A. Gee
Keyword(s):  
Internal Pressure ◽  
Flow Regime ◽  
North American ◽  
North American Species ◽  
Central American ◽  
Water Current ◽  
Stream Fishes ◽  
Swim Bladder ◽  
The North ◽  
Excess Internal Pressure

Of 23 species (nine families) of Central American fishes examined, nine (eight physostomes, one physoclist) did not reduce buoyancy by decreasing swim-bladder volume when current was encountered. The remainder (six physostomes, eight physoclists) decreased buoyancy, usually within 24–48 h, but three of these species (one physostome) were unable to maintain a reduced buoyancy for as long as 72 h once the minimum was achieved. All species have an excess internal pressure of swim-bladder gas. All of the North American species that have been studied do show a buoyancy alteration in response to changes in water current and adjust to a greater extent, although rates of adjustment appear similar to those of Central American fishes. Differences in flow regime between North and Central American streams are described and may partially account for these differences in reaction to water current.

Biology and management of North American cone-feeding Dioryctria species

2011 ◽  
Vol 143 (1) ◽  
pp. 1-34 ◽  
Author(s):  
C.M. Whitehouse ◽  
A.D. Roe ◽  
W.B. Strong ◽  
M.L. Evenden ◽  
F.A.H. Sperling
Keyword(s):  
Integrated Pest Management ◽  
Pest Management ◽  
North American ◽  
Evolutionary Ecology ◽  
Population Distribution ◽  
Host Finding ◽  
Future Research ◽  
Host Acceptance ◽  
Lepidoptera Pyralidae ◽  
Species Groups

AbstractConeworms, Dioryctria Zeller (Lepidoptera: Pyralidae), are destructive pests of conifers across North America, and members of several different species groups present significant pest-management challenges in conifer seed orchards. Dioryctria abietivorella Grote (abietella group) is the most pestiferous Dioryctria species in Canada. Despite this status, control tactics are currently limited to broad-spectrum pesticides that threaten non-target species and may result in pesticide resistance. The development of integrated pest management programs targeting Dioryctria species will benefit from a conceptual framework on which to base future research. To create this structure, we review the systematics, evolutionary ecology, and management of cone-feeding North American Dioryctria species. Current research suggests that many species boundaries are in need of further revision. Major gaps in our understanding of Dioryctria ecology impede the development of integrated pest management tactics. For example, host-generated semiochemicals are important in Dioryctria reproduction, although the uses of these cues in host-finding and host acceptance remain unknown. Future research should identify factors that mediate population distribution at landscape (e.g., migration), local (e.g., feeding stimulants), and temporal (e.g., development thresholds) scales.

Setting Theoretical Egos Aside: Issues and Theory in North American Archaeology

2003 ◽  
Vol 68 (2) ◽  
pp. 213-243 ◽  
Author(s):  
Michelle Hegmon
Keyword(s):  
Material Culture ◽  
North American ◽  
Evolutionary Ecology ◽  
Theoretical Argument ◽  
Research Issues ◽  
American Archaeology ◽  
Clear Cut ◽  
Theoretical Approaches ◽  
North American Archaeology ◽  
Theoretical Perspectives

Theory in North American archaeology is characterized in terms of foci and approaches manifested in research issues, rather than in explicit or oppositional theoretical positions. While there are some clear-cut theoretical perspectives—evolutionary ecology, behavioral archaeology, and Darwinian archaeology—a large majority of North American archaeology fits a broad category here called “processual-plus.” Among the major themes that crosscut many or all of the approaches are interests in gender, agency/practice, symbols and meaning, material culture, and native perspectives. Gender archaeology is paradigmatic of processual-plus archaeology, in that it draws on a diversity of theoretical approaches to address a common issue. Emphasis on agency and practice is an important development, though conceptions of agency are too often linked to Western ideas of individuals and motivation. The vast majority of North American archaeology, including postprocessual approaches, is modern, not postmodern, in orientation. The relative dearth of theoretical argument positively contributes to diversity and dialogue, but it also may cause North American theory to receive inadequate attention and unfortunate misunderstandings of postmodernism.

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