HERNANDEZ, L.P.*; DEVOTO, S.H.: Distribution and development of cranial slow muscle fibers in zebrafish The distribution of muscle fiber types within cranial musculature has great physiological implications for both feeding and breathing in fishes. While the distribution and development of slow muscle fibers in the trunk of zebrafish have been well described, cranial muscles have […]

ERICSSON, R; FALCK, P; JOSS, J; OLSSON, L: Development of the Larval Head in Australian Lungfish and Mexican Axolotl Development of the larval head in Australian lungfish and Mexican axolotl. Lungfishes are the extant sister group to tetrapods, so a comparison of lungfishes and salamanders span the transition from a totally aquatic to a biphasic […]

ADAMS, N.L.*; FOLTZ, K.R.: UV radiation delays mitosis and dephosphorylation of cyclin dependant kinase 2 in sea urchin embryos Ultraviolet radiation (UVR) causes dosage-dependent delays in cell division. Multiple molecular targets of UVR have been investigated in mammalian somatic cells, but they have not been identified conclusively in embryonic cells. Our main objective has been […]

JACOBS, M. W.; SHERRARD, K. M.: Shape Matters: The Effect of Nutritional Stress on Juvenile Growth Rates of Four Species of Ascidians Ascidians are common invasive species, and often competitively dominant in fouling communities. Ascidian juveniles exhibit a range of early growth strategies, from encrusting (flat, low in the boundary layer) to erect (tall, high […]

NEWLON III, A.W.; YUND, P.O.; STEWART-SAVAGE, J.*: Phenotypic Plasticity of Reproductive Effort in a Colonial Ascidian Phenotypic plasticity, the capability of a genotype to produce different phenotypes in different environments, is an adaptive response to temporal and spatial oscillations in the environment. Previous studies have suggested phenotypic plasticity in the reproductive effort of Botryllus schlosseri, […]

CLUM, N.J.*; PREEST, M.R.: Incubation History and Embryonic Development in Boat-tailed Grackles Synchronicity of hatching in birds can have significant effects on the survival of individual chicks and entire broods. Hatch synchrony in birds is assumed to be primarily under the control of the incubating female, with incubation at the start of laying resulting in […]

ZELDITCH, M.L.*; LUNDRIGAN, B.L.: Developmental causes and costs of precocial development. The adaptive value of precocial development may depend on its developmental basis. When precociality arises by an increase in developmental rate, later growth may be constrained because terminally differentiated cells do not divide. This trade-off has been postulated for precocial birds. In mammals, precociality […]

BOWDEN, RM*; EWERT, MA; NELSON, CE: Variation in Yolk Hormones in Follicles of the Painted Turtle Maternally derived yolk hormone levels vary seasonally in the painted turtle, Chrysemys picta, and this variation is correlated with offspring sex ratios in the laboratory. We examined variation in the concentration of three steroid hormones in three follicle size […]

PARK, D.; MINOR, M.D.; PROPPER, C.R.*: The Effect of a Common Insecticide on Mosquitofish Morphology is Seasonally Dependent Reproduction in many species follows a seasonal pattern governed by appropriate changes in endocrine physiology. Sensitivity to endocrine disrupting compounds (EDCs) may therefore vary seasonally as the endocrine system cycles. In order to determine if there is […]

HOLFORD, K.C.*; BORST, D.W.: Phosphorylation regulates farnesoic acid O-methyl transferase activity in the mandibular organ of the lobster, Homarus americanus. Synthesis of methyl farnesoate (MF) by the lobster mandibular organ (MO) is regulated by a neuroendocrine peptide (MO-inhibiting hormone; MOIH) secreted by the sinus gland (SG), a neurosecretory organ in the eyestalk. MOIH regulates MF […]