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Minnows
Title: Minnows
Category: Science & Technology
Details: Words: 1350 | Pages: 5.7 (approximately 235 words/page)
Minnows
Low Temperature Effects on Minnows (Phoxinus phoxinus) and juvenile Atlantic Salmon (Salmo salar)
Studies have shown that freshwater minnows and juvenile Atlantic Salmon become nocturnal with increased low temperature. To determine if these species are nocturnal at low temperatures, counts of individual fishes would be taken by how many fishes are observed during the daytime taking refuge underneath rocks. Also, by observing how many individuals are active at nighttime. At a warmer day time temperature …showed first 75 words of 1350 total…
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…showed last 75 words of 1350 total…the refuge was dependent on temperature (F 2.69 = 26.82, P < 0.001), increasing approximately linearly with temperature over the range studied (linear term of polynomial contrasts, F 1.69 = 52.35, P < 0.001; quadratic term, F 1.69 = 1.30, NS; Scheffe multiple comparison test revealed significant differences between all three test temperatures) (Greenwood & Metcalfe, 1998).
The time out of refuge at night resulted in the relative percentage of the fish's observed time out of refuge that was nocturnal increasing as the temperature dropped. Effect of temperature: F 2.68 = 14.10, P
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