Browsing Ohio Journal of Science: Volume 80, Issue 5 (September, 1980) by Title

Pesticide Analysis, Egg and Eggshell Characteristics of Red-Tailed Hawk Eggs

Springer, Mark Andrew ( 1980-09 )

In this study, addled and viable Red-tailed Hawk eggs were compared in terms of pesticide levels, egg and eggshell parameters, and shell ultrastructure as determined by scanning electron microscopy. These values were then ...

Red-Winged Blackbirds: I. Age-Related Epaulet Color Changes in Captive Females

Miskimen, Mildred ( 1980-09 )

Twenty-four female red-winged blackbirds (Agelaius phoeniceus) were trapped when juveniles and held captive during 3.5 years of observation. Color changes in upper secondary coverts (epaulets) of wings occurred at the time ...

Red-Winged Blackbirds: II. Pigmentation in Epaulets of Females

Miskimen, Mildred ( 1980-09 )

This study describes color changes in upper secondary coverts (epaulets) of female red-winged blackbirds (Agelaius phoeniceus) in successive molts. The methods used included Munsell color chips and microscopic examination ...

Trophic Assessment iof Ten Publicly-Owned Northeastern Ohio Likes

Olive, John H.; Karn, Barbara Parish ( 1980-09 )

Trophic assessments of 10 publicly-owned northeastern Ohio lakes including Aquilla, Baldwin, Findley, Hinckley, Hodgson (Muddy), Spencer, Lower Shaker, Upper Shaker, Virginia Kendall, and Wallace indicated that all were ...