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. […]

REES, B.B.*; SCHULTE, P.M.: Is intron 2 of the Fundulus lactate dehydrogenase B gene a hypoxia responsive element? Previous studies have shown that liver lactate dehydrogenase B (LDH-B) activity increases during hypoxic exposure of F. heteroclitus. Several glycolytic genes in mammals are known to be upregulated during hypoxia via the binding of hypoxia-inducible factor (HIF-1) […]

TOMANEK, L.*; SOMERO, G.N.: Heat-shock protein (hsp) 70 and promoter sequences in species of the genus Tegula from widely differing thermal environments Marine gastropod species of the genus Tegula occupy widely differing thermal environments along the transition from the sub- to the intertidal zone. Corresponding with these differences in vertical zonation are findings that the […]

KHAN, H.R.*; MATSUSHIMA, O.; ALKINDI, A.Y.A.; SALEUDDIN, A.S.M.: Effects of serotonin, FMRFamide-related and vasopressin-related neuropeptides on free amino acid mediated osmoregulation in a pulmonate snail. Osmoregulatory roles of serotonin and FMRFamide-related (FaRPs) in invertebrates have been shown in previous studies. We have studied the effects of serotonin, five FaRPs and three vasopressin-related neuropeptides on free […]