10:15 A NEW SUBGENUS AND NEW SPECIES OF CRAYFISH (DECAPODA: CAMBARIDAE), WITH AN AMMENDED DESCRIPTION OF THE SUBGENUS LACUN1CAMBARUS. Raymond F. Jezerinac, Department of Zoology, The Ohio State Technical Section University at Newark, University Drive, Newark., Ohio 43055. A new subgenus of crayfish and a new species are described. The new subgenus differs from the subgenus Lacunicambarus in having one-third to one-fourth of the palm of the chelae studded with tubercles, the dactyl to palm Abstracts length is always < 1.8, and a subpalmar tubercle is usually absent. The new species is most closely related to Cambarus (Lacunicambarus) acanthura Hobbs but differs from it in that NOTE: Abstracts of posters follow abstracts of podium presentations by section. the distomedian spine on the mesial ramus of the uropod does not overreach the rounded margin of the ramus and the merus always has a well developed spiniform tubercle on the anterior ventral articulation rim. The species occurs in Kentucky, Ohio, Pannsylvania, Tennessee, and West Virginia. 10:30 SYSTEMATICS OF Notropis ypluce 11 us AND Notrppjs wickllffi (CYPRINIDAE: PISCES) FROM OHIO A. Zoology WATERS. Lixin Gong and Ted M. Cavender, Museum of Zoology, Only Morning at 9:45 am The Ohio State University, 1813 North High Street, Columbus, Ohio, 43210 SATURDAY, APRIL 27, 1991 Since its description, the channel shiner, Notropis University Hall 024 wic.k.llffj.i has been considered a subspecies of the mimic shiner, Notropjs voluceljus. A definitive morphological Miles Coburn, Presiding analysis of the two forms via multivariate and univariate techniques revealed that the two forms are distinct species. Discriminant function analyses classified the two species 96-99 % correctly. AMPHIBIANS AND REPTILES OF FOUR HAMILTON COUNTY 9:45 PARKS. David Rubin. Department of Biology, Within Notropis volucellus, the variation in morphometric Central State University, Wilberforce, OH 45384 and meristic characters was significant among populations of the same major drainage basin and between basin populations. Some characters, such as vertebral number, From 1988 to 1990, four Hamilton County parks were surveyed number of lateral line scales, number of predorsal scales, for amphibians and reptiles. Field work was supplemented caudal peduncle depth, and predorsal length, exhibited by library search, examination of museum specimens, and north-south clines. These were correlated with latitudinal personal interview. Parks studied were Embshoff Woods (226 environmental variables such as temperature and light. Due acres), Shawnee Lookout Park above the Lawrenceburg Road to the great divergence of morphological characters across (773 acres), Woodland Mound Park (920 acres), and Miami- its range, more taxonomic forms could be revealed within Whitewater Forest (2262 acres). Numbers of species record- "Notropis volucellus" than currently recognized if a total ed were 10, 14, 20, and 27 respectively. Herpetological geographic analysis was conducted. diversity was positively correlated with park size and general ecological diversity. The cave salamander (Eurycea In Ohio, the two species, Notrgpis volucellus and Notropis lucifuga), endangered in Ohio, was recorded from Embshoff wick!iffi, had similar biological characters, such as age Woods" and from several sites in Miami-Whitewater Forest. and growth, fecundity and reproductive season but Other significant records include dusky (Desmognathus possessed distinctly different habitats. The Ohio River fuscus) and slimy (Plethodon glutinosus) salamanders at was found to be the exclusive domain of N^ wickliffi. Woodland Mound Park and the worm snake (Carphophis amoenus) at Miami-Whitewater Forest. Red-backed salamander (Plethodon cinereus) or ravine salamander (P_. richmondi) 10:45 MONITORING FISHES OF THE OHIO RIVER. Ted was recorded from each park but no park yielded both. M. Cavender and Judith K. Cavender, Hamilton County parks serve as important reservoirs for Museum of Zoology, The Ohio State University, 1813 amphibians and reptiles. Greatest danger to continued North High Street, Columbus, Ohio, 43210. viability of park populations comes from park development and private development of bordering land. Amphibian and Fish collections were made with a bag seine at reptile populations at Miami-Whitewater Forest do not 105 boat launching ramps distributed along the appear adversely affected by proximity to the Fernald length of the Ohio River as part of a study to test Nuclear Enrichment Plant. the ability of ramp sampling to monitor the river's fish populations. Ramps are fairly evenly distributed on both sides of the river in both 10:00 THE DISTRIBUTION OF CAMBARUS (JUGICAMBARUS) channel margin and backwater habitats. The MONONGALENSIS ORTMANN (DECAPODA: CAMBARIDAE) technique was especially effective at capturing WITH COMMENTS ON ITS TAXONOMIC STATUS, LIFE data on young-of-the-year, was efficient in actual HISTORY, AND HABITAT. G. Whitney Stoctcer, 13773 Bodle Rd. , collecting time expended (<0.5 man hours per NE, and Raymond F. Jezerinac, The Ohio State University at sample) and was rich in information on the Newark, University Dr., Newark, Ohio 43055. distribution and relative abundance of fish taxa. Sixty-seven species and two hybrid combinations Two disjunct populations of Cambarus (J_.) monongalensis were identified from more than 18,000 individuals exist. One population is confined to the mountains of West sampled between river miles 43.5 and 980.9. Forty Virginia and Virginia and the other to the Appalachian seven species were recorded upstream from Markland Plateau in West Virginia and Pennsylvania. Though 178 Dam (RM 531.5) and 49 downstream. Significant specimens were examined, there were no statistically records include the Mississippi silverside, Menidia significant morphometric (13) or meristic (2) characters beryl 1ina. Captures at RM 973.1, 951.1, 942.5 and that differentiated the populations other than size. The 881.0 are apparently new records for the Ohio River plateau populations tended to have larger chelae, longer and indicate this species is extending its range dactyls, shorter palms, and the areola is longer and upstream from its previous reported occurrence narrower than the mountain populations. The populations on (circa 1975) at the Ohio-Mississippi River the plateau also have either an obtuse or an absent confluence. suborbital angle and the ventrolateral margin of the merus of the first pereiopod usually has one spine, whereas the mountain populations usually have an acute suborbital angle A. Zoology and the merus usually has two or three spines. The mountain populations inhabit springs and seeps, whereas the plateau Only Afternoon & Business Mtg. at 1:30 pm populations inhabit wooded hillsides and occasionally seeps. First form males are probably present year round and SATURDAY, APRIL 27, 1991 the majority of females probably extrude their eggs sometime between January and April, but can be as late as July. The University Hall 024 plateau populations collects leaves of deciduous trees and Miles Coburn, Presiding herbaceous plants as food. The diet of the mountain population is unknown. 23 ANALYSIS OF MITOCHONDRIAL SEQUENCE VARIATION 2:45 THE ALLOMETRY OF COOLING, SUPERCOOLING 2:00 IN ENDANGERED SPECIES OF LAKE VICTORIA AND FREEZING IN THE FREEZE-TOLERANT CICHLID FISH. Gregory C. Booton*, Doug Warmolts+, TURTLE, CHRYSEMYS PICTA. Peter A. Zani & Sandy Andromeda+, Paul A. Fuerst*. *The Ohio State University, Dept. of Dennis L. Claussen. Dept. of Zoology, Miami Univ., Molecular Genetics, 484 W. 12th. Ave., Columbus, Ohio 43210, and +The Oxford, Oh. 45056. Columbus Zoo, 9900 Riverside Drive, Powell, Ohio 43065. Although several vertebrates are freeze Recent developments in molecular techniques such as the Polymerase tolerant, little is known of the relationship Chain Reaction (PCR), and DNA fingerprinting have provided researchers with between body size and the kinetics of cooling and powerful methods to examine underlying genetic variation of populations, as freezing. We compared these responses for six well as the taxonomic relationships between and among species. We are using hatchling and eight adult Chrysemys picta from a these methods to examine the genetic variation of endangered African Cichlid single Ohio population. All turtles initially fishes, which are being propagated in captivity at the Columbus Zoo. recovered from freezing, and all adults, but only Lake Victorian cichlid fishes make up a large species flock of some 250+ two hatchlings (which experienced ice contents of species. This large association of closely related species represents a burst of about 35%), exhibited long-term survival. Rapid speciation of interest to evolutionary biologists due to the relatively short period thawing may have compromised hatchling survival. of time in which it occurred (less than one million years). The opportunity to Turtle water content was inversely related to body study these species, and their evolutionary history is now threatened. The mass, but we found no significant correlation introduction of a non-native predator fish (the Nile perch ), pollution, and between the extent of supercooling and body size. overfishing have combined to threaten the entire assemblage with extinction. Pre-freezing and post-freezing cooling rates To preserve these species for research, and possible re-introduction to the scaled with body mass to the -0.55 and -0.40 power native environment, a species protection plan has been formulated. Our