Topic
Central mudminnow
About: Central mudminnow is a research topic. Over the lifetime, 38 publications have been published within this topic receiving 1161 citations. The topic is also known as: Umbra limi.
Papers
TL;DR: Three alternate and distinct fish assemblages were identified in 43 northern Wisconsin lakes encompassing a gradient from bog ponds to small, oligotrophic lakes having little bog character, and two factors, lake pH and winter anoxia, were especially crucial in determining assemblage type.
Abstract: Three alternate and distinct fish assemblages were identified in 43 northern Wisconsin lakes encompassing a gradient from bog ponds to small, oligotrophic lakes having little bog character. Multivariate analysis of physical/chemical variables identified three general environmental factors that influence community type and species richness. These factors are: (1) habitat size and heteroge- neity; (2) lake productivity- pH; and (3) winter oxygen concentrations. Ordination of lake fish assem- blages along these environmental gradients revealed that two factors, lake pH and winter anoxia, were especially crucial in determining assemblage type. Maintenance of these discrete assemblages is also the result of biotic interactions (exclusion of cyprinids due to predation or competition from centrar- chids). A centrarchid assemblage dominates lakes across a wide range of habitat types and pH, providing winter anoxia does not occur. Lakes with low winter oxygen concentrations harbor a cyprinid assem- blage if the pH is above 5.2-5.4. Lakes that are acidic and also have low winter oxygen contain only two physiologically hardy species comprising the Umbra-Perca assemblage: central mudminnow (Um- bra limi) and yellow perch (Perca flavescens). Five fishless lakes had physical and chemical charac- teristics similar to lakes with an Umbra-Perca assemblage. Within the fish assemblages, no subgroups of closely associated species were evident. For Umbra-Perca lakes, few environmental differences were evident between lakes having (1) no fish, (2) central mudminnows only or, (3) yellow perch and central mudminnows. The sequential loss of species along a gradient from oligotrophic seepage lakes to bog ponds reflected the increased harshness of the chemical environment and the loss of near-shore habitat zones. Species that are specialized zooplanktivores, that utilize hard-bottom substrates for spawning or feeding activities, or that are intolerant of low pH were limited to lakes with little bog character. Lakes in intermediate stages of succession contained acid-tolerant species that are food and habitat generalists. Lakes near the final stages of senescence contained only yellow perch and central mudminnows. The location of bog lakes at the lower end of several environmental gradients makes them valuable sites for studying the influence of environmental factors and biotic interactions on the structure of aquatic communities.
209 citations
TL;DR: Differences in the lowest pH at which 31 fish species occurred in northern Wisconsin lakes were observed, and knowledge of the pH ranges naturally tolerated by fishes and the structure of fish assemblages in lakes sensitive to acid precipitation will aid in detecting changes caused by cultura...
Abstract: In a group of 138 northern Wisconsin lakes (pH 40–92), we observed differences in the lowest pH at which 31 fish species occurred The central mudminnow (Umbra limi), yellow perch (Perca flavescens), and various centrarchids occurred below pH 50, whereas many cyprinids and darters were not found below pH 62 Rankings of species occurrence with minimum pH in these naturally acidic lakes were similar to data from Canadian lakes affected by acid precipitation, and rankings based on survival during laboratory exposure to low pH Wisconsin oligotrophic lakes that are susceptible to acid precipitation typically lack many fish species sensitive to low pH, even when lake pH is near 70 Species interactions and biogeographic factors, not recent cultural acidification, are probably responsible for species absences in these lakes Knowledge of the pH ranges naturally tolerated by fishes and the structure of fish assemblages in lakes sensitive to acid precipitation will aid in detecting changes caused by cultura
108 citations
TL;DR: Comparisons of survival rates for caged fish transferred from high to low pH sites in the Big Moose drainage system demonstrated relatively greater acid tolerane of non-native species than native cyprinids, which suggested possible genetic adaptation to acid stress by the yellow perch population inhabiting Big Moose Lake.
Abstract: The distribution of fish species in the North Branch of the Moose River (Lake Rondaxe to headwaters of Big Moose Lake) was determined by intensive netting and electrofishing surveys of lakes and streams in the watershed during 1982–83. A chronology of changes in fish species occurrence in the drainage system was reconstructed from earlier published surveys conducted in 1882 and 1931 and unpublished survey data obtained by the NYSDEC during the period 1948–1975. Native species present in 1882 were also collected in 1931. Smallmouth bass (Micropterus dolomieu) were introduced in the early 1900's and were present in collections made in 1931. Major changes in the fish community have taken place since 1931. The smallmouth bass and many of the native species found in the earlier surveys were either absent or restricted in occurrence to downstream sites (eg. L. Rondaxe and Moss L. sub-drainage) in 1982. Non-native species introduced after 1931 (yellow perch,Perca flavescens; central mudminnow,Umbra limi; banded killifish,Fundulus diaphanus) are currently widely distributed throughout the drainage system. In particular, the yellow perch is now a dominant species in the larger lakes of the basin. Comparisons of survival rates for caged fish transferred from high to low pH sites in the Big Moose drainage system demonstrated relatively greater acid tolerane of non-native species (yellow perch, mudminnow, killifish) than native cyprinids. Watershed acidity gradients (pH and aluminum concentrations) and relative physiological acid tolerance are major determinants of currently observed fish species distribution patterns in the North Branch of the Moose River. Differences in age and size structure of fish populations inhabiting acidic and non-acidic lakes of the drainage system were apparent, but difficult to interpret without additional information onpopulation size and potential density dependent parameters such as age specific growth and survival rates. Differential hatching success was observed for yellow perch eggs reciprocally transferred between acid (Big Moose) and neutral (Moss L.) lakes. Eggs transferred from Moss L. to Big Moose L. exhibited poor hatching success as a result of alterations in egg membrane structure that inhibited normal egg expansion and the hatching process. This effect was not evident in eggs from the same parents reared in Moss Lake nor in eggs from the Big Moose parents reared in both lakes. These experimental observations suggested possible genetic adaptation to acid stress by the yellow perch population inhabiting Big Moose Lake.
81 citations
TL;DR: It was concluded that the chromosomes of Umbra limi displayed typical responses to low level radiation exposure and that this fish would be an ideal cytogenetics model for this study of induced chromosome aberrations in fishes.
Abstract: Due to the lack of information available on the effect of various clastogenic agents on the chromosomes of fishes, an in vivo cytogenetics model system was developed. The central mudminnow, Umbra limi, was chosen fro this study because of its ideal karyotype consisting of 22 large meta- and submetacentric chromosomes. Various organs of the fish were investigated to determine their suitability for chromosome preparations. The tissues of the intestines, stomach, kidneys, and gills were found to be the most suitable for clastogenic studies. Phase contrast observations were made on the chromosomes of control mudminnows and mudminnows exposed to 325 R of X-radiation. The control rate of spontaneous chromosome aberrations was found to be low (about 0.03%). In contrast, fish exposed to 325 R of X-rays had aberrations in approximately 30% of the metaphases per fish examined. An apparent increase in clumping and a decrease in the mitotic index were also noted. It was concluded that the chromosomes of Umbra limi displayed typical responses to low level radiation exposure and that this fish would be an ideal cytogenetics model for this study of induced chromosome aberrations in fishes.
68 citations
TL;DR: The feasibility of using a fish such as the mudminnow to investigate cytogenetic consequences of aquatic pollution is demonstrated, with large linear dose-dependent increases in SCE rates observed in all tissues examined.
Abstract: Sister-chromatid exchange (SCE) studies using the central mudminnow, Umbra limi, demonstrated its usefulness as a model in vivo system for the detection of genetically active substances (mutagens and/or carcinogens). 5 days following the injection of 500 μg/g of 5-bromodeoxyuridine (BrdU), SCE rates were found to be quite low in the gills (2.0–3.3 SCEs/metaphase), kidneys (2.6–3.4 SCEs/metaphase), and intestines (3.7–4.5 SCEs/metaphase). However, after i.p. exposure to microgram quantities of methyl methanesulfonate (MMS) or cyclophosphamide (CP), large linear dose-dependent increases in SCE rates were observed in all tissues examined. On a μg/g basis, CP was found to be a 2–4 times more potent inducer of SCE than was MMS. Studies involving the addition of neutral red dye (NR) to the fish's aquarium water revealed that the mudminnow could concentrate the due in its gill and kidney tissues. This dye was found to cause significant increases in SCE rates at water levels of less than 0.1 ppm. However, the concentration of dye in the tissues did not show a correlation with the SCE rate. Possible explanations for this observation are presented in the text. These findings demonstrate the feasibility of using a fish such as the mudminnow to investigate cytogenetic consequences of aquatic pollution.
67 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2015 | 2 |
| 2013 | 1 |
| 2011 | 1 |
| 2010 | 2 |
| 2007 | 2 |
| 2006 | 3 |