1,456 research outputs found
Creating Public Outreach Information to Support a Culture of Water Quality Stewardship in the Zumbro Watershed
This project was a combined effort between the University of Minnesota Center for Urban and Regional Affairs, The Center for Changing Landscapes, and The Zumbro Watershed Partnership. The focus of the position was to assist in gathering historic, water quality impairment, and ecological data about the Zumbro River watershed in southern Minnesota. These findings were added to a previous body of information on the Zumbro River watershed compiled by the Center for Changing Landscapes. Eventually, this assembly of research will assist in the creation of informational kiosks, or “education stations” in public spaces within the watershed, and be used to apply for further grant funding on behalf of the Zumbro Watershed Partnership. The research was focused on gathering information on three specific sites in the watershed: Mantorville, Wanamingo, and Greenbridge. Although Mantorville, Wanamingo, and Greenbridge are geographically similar, their background and present use is quite different. It was discussed during initial meetings with the Center for Changing Landscapes that the historic and cultural context of each of the sites should be addressed. These nuances were explored in order to best cater the education stations to each site.Prepared in partnership with The Center for Changing Landscapes and the Zumbro Watershed Partnership by the Community Assistantship Program (CAP), which is administered by the Center for Urban & Regional Affairs (CURA) at the University of Minnesota
Intra-Specific Variation in the Common Shiner, Notropis cornutus frontalis (Agassiz) from Minnesota and South Dakota
The voluminous literature relating to intra-specific variations in fishes has been reviewed by Hubbs (1934, 1940), Tanning (1952), Lindsay (1953) and others. A majority of the workers have supported the interpretation that the variation is influenced by various environmental factors, primarily the temperature during the pre-fry stages of development. Certain of the meristic characters which show such variability have been generally used in identifying various races of minnows. If such characters as the number of anal fin rays or scales in the lateral line are easily influenced by the environment, their usefulness in defining races is certainly open to question. However, if they are little influenced by environmental conditions, then their usefulness is not subject to such criticism. Support for the latter view can be found in certain experimental studies (Gabriel 1944, Heuts 1949)
Revised Distribution Records of Some Minnesota Fishes, With Addition of Two Species to the Faunal List
Recent collections of fishes in Minnesota hove resulted in the addition of two species, Moxostoma carinatum (Catostomidae) and Ammocrypta asprella (Percidae), to the state\u27s inland faunal list. Additional information on the distribution of 11 other species (Minytrema melanops, Hybopsis x-punctata, Opsopoeodus emiliae, Dionda nubiloa, Notropis amnis, Notropis texanus, Notropis umbratilis, Pimephales vigilax, Lepomis humilis, Etheostoma asprigene, ond Etheostoma microperca) is presented . Collections in large rivers are responsible for several new distribution records, and further sampling in such habitats should lead to further discoveries
MNDNR Region 5 - Southeastern Minnesota evaluation of geomorphology-based Rosgen stream classification system
Draft report by MN DNR and MN pollution Control Agency scientists concerning stream classification in Southeastern Minnesota. Includes data on Gilmore Creek. Highlighting throughout. Folder titled Lake Winona Gilmore Creek. 23 pages. Part of the Cal R. Fremling Collection.https://openriver.winona.edu/calfremlingpapers/1085/thumbnail.jp
Dredging figures
Maps, tables, images intended for reference with or use in Lake Winona dredging proposals and reports. Locations mapped include Riverbend Industrial Park, Lake Winona, Mississippi River, City of Winona. Multiple copies included. All items are photocopies. 32 pages. Part of the Cal R. Fremling Collection.https://openriver.winona.edu/calfremlingpapers/1058/thumbnail.jp
Minnesota Banded Darters (Etheostoma zonale) Exhibit a High Degree of Genetic Similarity in Mitochondrial DNA Sequences Occurrence
Hylogeography, or the historical interpretation of population genetic data, is a useful tool for addressing historical processes like the colonization history of organisms. North American freshwater fishes have experienced glacial ebb and flow in their relatively recent past (as little as 10,000 years before present in Minnesota), and studies of variation in intraspecific DNA sequences of these fishes can shed light on their radiations into previously glaciated areas. This study assessed intraspecific variation in two mitochondrial genes of the banded darter (Etheostoma zonale) from seven Minnesota localities. A high degree of similarity was found among all individuals in the study. This finding prevented phytogeographic analysis, but it is informative about other historical factors, such as the significance of population bottlenecks during colonization
TOURISM AND RECREATION: A SUBSTANTIAL INCOME POTENTIAL FOR THE MEMORIAL HARDWOOD FOREST AREA OF SOUTHEAST MINNESOTA
Community/Rural/Urban Development, Resource /Energy Economics and Policy,
Effects of Hydrology on the Growth and Recruitment of Stream Fish in the Eastern Broadleaf Province of Minnesota
Agricultural practices and urban development have altered streamflows within the Eastern Broadleaf Province of Minnesota. Stream-flow alteration can produce significant changes in native freshwater communities. Therefore, knowledge of streamflow effects on representative freshwater populations and communities within the province are needed to maintain ecological integrity. Fish community and population dynamics often display predictable responses to flow regimes, which can make fishes model organisms for examining flow-ecology relationships.
In lotic systems, annual variation in streamflow can influence the annual growth and recruitment of fishes. Understanding the growth and recruitment of fish populations is essential for management and conservation efforts. Growth can affect population size structure and sexual maturation, while recruitment can affect the abundance, and genetic diversity of a population.
Recruitment was quantified using studentized residuals from weighted catch-curve regressions as a measure of year-class strength. Relationships between annual streamflow magnitude and variability and the recruitment of the three species of interest were identified according to species-specific traits. I quantified the growth of Smallmouth Bass Micropterus dolomieu, Rock Bass Ambloplites rupestris, and Northern Hogsucker Hypentelium nigricans populations with mixed-effects growth models. Data from streams exhibiting growth-year effects were used to examine relationships between summer-high-flow duration and annual fish growth.
Little evidence was found for either long-term or short-term flow effects on recruitment during the adult spawning or juvenile rearing periods. The recruitment of nest-building and benthic-lithophilous fishes was not significantly related to long-term-spawning-period flow magnitude for the majority (i.e., 10 of 14) of streams, and was not significantly related to short-term-spawning-period flow magnitude at any of the 14 streams. Recruitment of fishes exhibiting cruiser, maneuverer, and benthic-hugger locomotion morphologies was not significantly related to long-term-rearing-period flow variability for the majority (i.e., 12 of 14) of streams, and was not related to short-term-rearing-period flow variability for any of the 14 streams. Growth was attributed to age and individual fish effects for 11 of the 28 fish populations among species. Most populations that exhibited growth-year effects among streams did not show a significant relationship between growth and the duration of summer-high flows (i.e., 4 of 11 populations).
Temperature regimes, as well as the timing, magnitude, and frequency of flows may have contributed to differences in the annual recruitment and growth of fishes among some of the streams in this study. However, minimal growth-year effects observed at the majority of my streams suggest that biotic factors (e.g., fish age, genetic differences) may play a large role in determining the growth rates of fishes within the streams studied
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