Carstens, B. C.*; Lundrigan, B. L.: A phylogeny of the American nectar-feeding bats (Chiroptera, Phyllostomidae) based on morphological characters. There are forty-two recognized species of phyllostomid bats that feed primarily on nectar. As pollinators for more than three hundred species of plants the nectar-feeding members of the Phyllostomidae are an important component of neo-tropical ecosystems. […]

Durica, D.S.*; Anilkumar, G.; Wu, X.; Hopkins, P.M.: A Search for EcR and RXR A/B Isoform Gene Expression During Crustacean Limb Regeneration and Oogenesis We have previously reported the isolation of EcR and RXR gene homologs in the fiddler crab, Uca pugilator. In insects, isoforms for both the EcR and RXR/USP proteins have been identified; […]

GLENNEMEIER, K.A.; DENVER, R.J.*: A Physiological Mediator of the Response to Intraspecific Competition in Rana pipiens Tadpoles Competition is known to decrease growth and development rate in larval anurans, but the physiological mediators of this response have not been identified. We measured whole-body corticosterone content in Rana pipiens tadpoles raised at two different densities and […]

JOHNSON, G.W. *; JOHNSON, J.D.; IRWIN, L. N.: A Comparison of Random Genetic Variation in Bisexual and Unisexual Lizards. We analyzed genomic variation in three sympatric species of Teiid lizards of the genus Cnemidophorus that differ in reproductive structure and karyotype, to test the hypothesis that genetic variation is greater in parthenoforms than in sexually […]

HUYBRECHTS, R.; MACOURS, N.; HENS, K.; VANDINGENEN, A.: Zinc metalloprotease action in insect follicular developement In mammals, the prominent enzymes involved in regulation of blood pressure homeostasis, namely the carboxydippetidase angiotensin converting enzyme and the endopeptidase endothelin converting enzyme, both act by use of specific substrates. In insects, the occurrence of these two functional enzymes […]

JAYASANKAR, V. * 1; TSUTSUI, N. 2; JASMANI, S. 1; SAIDO-SAKANAKA, H. 1; AIDA, K. 2; WILDER, M.N. 1: Yolk Processing and Vitellogenin Gene Expression during Ovarian Maturation in the Giant Freshwater Prawn, Macrobrachium rosenbergii Recently, a cDNA encoding vitellogenin (Vg) was cloned in Macrobrachium rosenbergii, and its amino acid sequence deduced. Based on this […]

HARMS, H.K.*; BOWDEN, R.M.: Variation in yolk allocation in painted turtles (Chrysemys picta) Maternal allocation of nutrients to egg yolk in oviparous animals is increasingly recognized as a critical component of embryonic and neonatal fitness. Painted turtles (Chrysemys picta) yolk their eggs over a period spanning late fall to early summer. To examine potential differences […]

MULLINS, M.A.*; JANZEN, F.J.: Thermal Ecology of Smooth Softshell Turtle (Apalone mutica) Embryos Smooth softshell turtles (Apalone mutica) bear eggs with hard, water-resistant shells which presumably insulate them from all environmental factors except temperature. To evaluate the phenotypic effects of different mean temperatures and different thermal variances, and to separate temperature effects from maternal effects, […]

MILLER, WA; HATLE, JD; BORST, DW: The second half of the molt cycle in lubber grasshoppers is developmentally inflexible To deal with unpredictable environments many animals remain developmentally flexible, becoming unresponsive to environmental change (canalized) after commitment to a specific developmental pathway. We tested the hypothesis that Romalea microptera exhibit a canalized phase at the […]

MARTIN, T.R.; JASKOWIAK, K.M.; FEI, H.; HATLE, J.D.; BORST, D.W.: The physiological effects of starvation on vitellogenesis in the lubber grasshopper Previous studies with the lubber grasshopper, Romalea microptera, have shown that starvation inhibits oocyte growth. Since this effect may involve vitellogenesis, we studied its regulation during acute starvation. Adult females were collected at eclosion, […]