BIXLER, A.; TANG-MARTINEZ, Z.*: Mate choice in prairie voles: effects of genetic relatedness and familiarity Prairie voles, Microtus ochrogaster, are monogamous rodents. We examined the mating choices of sexually inexperienced male and female prairie voles in two-way choice tests under 3 different conditions. Subjects were tested with targets that were 1) either a familiar sibling […]

OLIVER,S.J.*; LOBEL,P.S.: Female mate choice based on male acoustic displays in domino damselfish, Dascyllus albisella Male Dascyllus albisella produce an acoustic and visual courtship display. A tagged population of fish (29 males and 31 females)at Johnston Atoll (Central Pacific Ocean) were observed for three months to assess the correlates of male mating success. Phenotypic, behavioral, […]

CHRISTIANS, J.K.; WILLIAMS, T.D. *: Effects of porcine follicle-stimulating hormone on the reproductive performance of female zebra finches (Taeniopygia guttata) It has been suggested that follicle-stimulating hormone (FSH) may play a role in egg size/number trade-offs in oviparous vertebrates. We tested this hypothesis in an avian species by administering porcine FSH (pFSH) to intact, captive […]

MAPLE, M.M.: Direct and indirect effects of maternal rearing site choice on tadpole survival in the strawberry arrow poison frog, Dendrobates pumilio Parental choice of early offspring environments can have important fitness consequences for their young, especially in taxa with otherwise limited parental investment. The pathways by which site variables influence fitness will determine the […]

COTTER, P.A.*; EVERSON, J.J.; RODNICK, K.J.: What comes in must go out:Ventricular blood flow patterns in the Rainbow Trout Hemodynamic parameters in fish are often measured using invasive techniques, limiting the use of repeated measure experimental designs. We used high-resolution (10 MHz) echocardiography, and doppler analysis of sagittal images to determine ventricular filling (diastolic) and […]

HOAGLAND, T.M.*; HANCOCK, T.V.; HILLMAN, S.S.: Systemic Vascular Compliance in Two Amphibians The mean circulatory filling pressure (MCFP), vascular compliance (VC) and unstressed blood volume (USBV) were measured in Bufo marinus and Rana catesbeiana, using in vivo methods. These values are integral for the understanding of venous function and cardiovascular homeostasis, and have been determined […]

Wilkens, J.L.; Yazawa, T.; Shinozaki, T.; ter Keurs, HEDJ: Sites and mode of action of proctolin and F2 on lobster cardiac muscle At low concentration (10-10 M), the peptide hormones proctolin (PR) and F2 cause an increase in the amplitude of electrically evoked contractions of lobster heart ostial valve muscle. At higher concentrations (PR >10-9 […]

Hunt von Herbing, I.*; Cashon, B.: Sickling in fish red blood cells The occurrence of the mutant hemoglobin Hb S in human red blood cells results in sickle cell anemia. In other animals,oxygen-linked sickling of red blood cells is largely unknown.In Atlantic cod red blood cells under oxygenated conditions cell morphology appears normal,but under low-oxygen […]

Blank, J.M.*; Davie, P.S.; Morrissette, J.M.; Block, B.A.: EFFECTS OF TEMPERATURE ON CARDIAC PERFORMANCE IN YELLOWFIN TUNA Tunas are remarkable among teleosts for their endothermy, high metabolic rates and high capacity for exercise. While tunas warm their swimming muscles and viscera, their hearts are thought to remain near ambient temperature. This raises the possibility that […]

Boettger, S.A.*; McClintock, J.B.: The effects of organic and inorganic phosphate on muscle contraction and acetyl cholinesterase activity of the nearshore echinoid Lytechinus variegatus. Lytechinus variegatus is a common nearshore sea urchin that is exposed to phosphate pollutants. Sea urchins were collected in April, 2000 from Saint Joseph’s Bay in the northern Gulf of Mexico. […]