Life History and Secondary Production of Caenis latipennis Banks (Ephemeroptera: Caenidae) in Honey Creek, Oklahoma Page: 28
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individuals/m2 and 6527 individuals/m2 respectively. Density was lowest, 43
individuals/m2, during late May. Variation in abundance of nymphs was observed
between years. Average density for September 1999 was 1238 individuals/m2 and 508
individuals/m2 for September 2000 (Figure 22).
No significant differences existed between seasons in standing stock biomass of C.
latipennis, though winter and summer densities were significantly different. Biomass
was not affected by high winter densities because the majority of the cohort was in small
size classes. Winter and early spring peaks in seasonal abundance of C. latipennis are
likely the result of continued recruitment from eggs oviposited in the fall and suppressed
emergence during the winter. Low densities in May are likely the result of effects of lack
of recruitment in conjunction with emergence in early spring. This pattern in abundance
is similar to C. amica in experimental ponds (Christman and Vorshell, 1992). This
population had higher abundance in the winter. Abundance patterns opposite to our
findings have been observed for C. luctrosa with higher densities in summer months
(Peran et al., 1999). Annual variation in density may have been the result of continued
drought conditions and high temperatures in the region or just natural variation between
years.28
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Taylor, Jason M. Life History and Secondary Production of Caenis latipennis Banks (Ephemeroptera: Caenidae) in Honey Creek, Oklahoma, thesis, August 2001; Denton, Texas. (https://digital.library.unt.edu/ark:/67531/metadc2863/m1/35/: accessed April 23, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; .