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Showing 1 to 7 of 7 for “"Madtoms"”.
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Tests of Adaptive Coloration Hypotheses for Madtom (Notorus) Catfishes (Siluriformes: Ictaluridae)
… stings, toxins, and camouflage color patterns. Madtoms, Noturus, are diminutive catfishes with dorsal and pectoral stings. Thirteen of the 25 nominal species have serrated spines in the pectoral sting and a contrasting pigment pattern. Behavior of two saddled species, N. miurus and N. …
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Distribution, ecology, and reproductive biology of the orangefin madtom (Noturus gilberti)
… Negative interspecific associates of orangefin madtoms included chubs, mountain redbelly dace, rosyside dace, crescent shiners, and crayfish; only Roanoke darters were considered positive associates. Sand and silt levels were significantly lower at sites with N. gilberti, while percentage of …
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Forage Fish Populations and Growth of Muskellunge in a South Dakota Power Plant Cooling Reservoir
… made up 68.3% of these species; tadpole madtoms (Noturus gyrinus), 25.8%; orangespotted sunfish (L.humilis), 3.6%; and black bullheads (Ictalurus melas), 2.3%. The estimated total standing crop of the 4 forage species was 28.1 kg/ha. The 1974 year-class was the oldest present among the …
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Controlled cultivation techniques for the recovery of threatened fishes in Virginia
… maturation in most captive female margined madtoms. Sperm production in mature male madtoms was enigmatic; motile sperm were observed only once. Plasma testosterone concentrations in males peaked just prior to the spawning season at 6.5 ng/mL, but levels were not correlated with male …
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A Comparison of the Pectoral Spines in Virginia Catfishes
… and yellow bullheads and margined and tadpole madtoms). In all species spine width increases linearly with total length. The spine base (dorsal process width and depth and dorsal-ventral length) grows linearly with total length in most species. However, measurements of the spine base increase …
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The Status and Distribution of the Topeka Shiner Notropis topeka in Eastern South Dakota
… sunfish Lepomis lutrenis and tadpole madtoms Noturns gyrinus. The presence/absence model showed that Topeka shiners were typically associated with red shiners Notropis lutrenis, tadpole madtoms Noturns gyrinus, black bullheads Ameiurus melas, and bigmouth shiners Notropis dorsalis. …
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Effects of Watershed and Habitat Conditions on Stream Fishes in the Upper Roanoke River Watershed, Virginia
… were absent elsewhere. For example, orangefin madtoms and bigeye jumprocks were only collected at three large sites. Fish distribution was a result of several factors such as watershed area, elevation, proportions of pools and of riffles, particle size, and land use within buffers and entire …