KRECH, J.P.*; VANDERGON, T.L.: Photolyase mRNA levels measured by RT-PCR vary significantly among individual eggs and during embryonic stages of development in the Pacific treefrog, Hyla regilla Recent worldwide declines in amphibian populations have led researchers to explore hypotheses that might explain this phenomenon. One hypothesis suggests that rising levels of ultraviolet (UV) radiation may […]

MCCAULEY, D.W.*; BRONNER-FRASER, M.: Pax Gene Expression in Ectodermal Placodes of the Lamprey Ectodermal placodes contribute to the cranial ganglia and sense organs of the head and, together with neural crest cells, represent defining features of the vertebrate embryo. The identity of different placodes appears to be specified in part by the expression of different […]

WEIL, K. A.*; SPARKES, T.C.: Parasite and sexual conflict in a stream isopod Sexual conflict is common in aquatic isopods and occurs prior to pair formation in the form of conspicuous mating contests. Females control the outcome of these contests and previous work has shown that female resistance during contests results in discrimination against males […]

BRYER, P.J.*; GLANZ, W.E.: Oviposition site selection by a tropical treefrog in a temporary pool environment Frogs that oviposit unguarded aquatic eggs display various strategies to help ensure their offspring’s survival. At one extreme, frogs can rely on camouflage or aversive taste to protect their eggs from predators, particularly fish. Alternatively, frogs can lay eggs […]

WOLF , Mary C; MOORE, Paul A: Orientation in Complex Sensory Landscapes: Spatial Arrangement of Odor Sources Modifies Orientation Strategies of Crayfish. In natural aquatic systems organisms are presented with multiple food cues that are distributed in space and have to make decisions on how to respond to this plethora of information. Previous orientation work […]

BROWMAN, H.I.*; SKIFTESVIK, A.B.; NOVALES FLAMARIQUE, I.; BOXASPEN, K.; BELANGER, M.: Ontogenetic changes in visual responses of the parasitic salmon Louse, Lepeophtheirus salmonis, to ultraviolet and polarized light The salmon louse is an ectoparasitic copepod of salmonid fishes whose life cycle involves two broadly-defined free-living larval stages, the nauplius and the copepodid. After settling on […]

MORJAN, Carrie L.: Nest-site choice in reptiles with temperature-dependent sex determination and the evolution of maternal effects Although maternal effects have traditionally been thought to hinder adaptive evolutionary responses, new theory suggests they play a key role in local adaptation through runaway processes. Oviposition-site choice by females coupled with progeny response to environment has often […]

MARTIN, T.J.*; BARNES, B.M.: Natural entrainment of circadian rhythms in the Arctic ground squirrel, Spermophilus parryii Light-sensitive radio collars and abdominally implanted temperature loggers were used in the field to measure daily activity and temperature patterns of the Arctic ground squirrel (Spermophilus parryii) throughout the active season, which includes periods with 24 hours of daylight. […]

YAN, B; LI, S; DUAN, C: Molecular interaction between fibronectin and insulin-like growth factor binding protein-5 (IGFBP-5) Previous studies have shown that IGFBP-5 is not only capable of regulating IGF activity by modulating the IGF ligand and receptor interaction, it also has intrinsic biological activity in vascular smooth muscle cells (SMC). The intrinsic action of […]

SILVER, M.S.*; LEE, K.J.; TAKAHASHI, A; KAWAUCHI, H; JOSS, J; SOWER, S.A.: Molecular Phylogenetic Analysis Within The Petromyzontiforme Lineage Using The cDNA For Lamprey Gonadotropin Releasing Hormone-III The lamprey lineage is generally considered to be divided into three families, the Petromyzonidae, or holarctic family, found in the northern hemisphere, and the two southern hemisphere families, […]