Petra Kranzfelder
Alyssa M. Anderson
William Bouchard Jr.
James Perry
Bruce C. Vondracek
Leonard C. Ferrington Jr.
Jane E. Mazack
2014
<p><i>Diamesa mendotae</i><span> Muttkowski, 1915</span><span> is a winter-active species common in groundwater-buffered streams of Minnesota and Wisconsin. This species is capable of surviving under snow cover for at least 28 days. Field collections of adult </span><i>D. mendotae</i><span> were used to determine survivorship under long-term exposure to controlled sub-freezing conditions. Specimens were placed into a controlled temperature chamber at −5 °C, batches removed at weekly intervals, and subsequently held at 6 °C to determine survivorship and longevity. Our results indicate that overall survivorship is negatively related to treatment duration of sub-freezing treatment, individuals can survive sub-freezing temperatures for at least 70 days, with total longevity of 92 days. Additionally, males had a significantly higher rate of survivorship than females within treatments. Total longevity increased with treatment time, suggesting adult </span><i>D. mendotae</i><span> may survive long periods of below-freezing temperatures under natural conditions before mating, which may convey population-level advantages.</span></p>
application/pdf
10.1080/01650424.2014.990040
en
Taylor & Francis
Survivorship and longevity of adult <i>Diamesa mendotae</i> Muttkowski, 1915 (Diptera: Chironomidae) at controlled, sub-freezing temperatures
article