SOCIETY FOR INTEGRATIVE AND COMPARATIVE BIOLOGY 2021 VIRTUAL ANNUAL MEETING (VAM)January 3 – Febuary 28, 2021 Meeting Abstract BERN-1  Wed Jan 6 12:30 – 13:30  Hormone-mediated phenotypic plasticity: is there an optimal hormonal phenotype? Hau, M; Max Planck Institute for Ornithology, University of Konstanz mhau@orn.mpg.de Environmental conditions fluctuate across days, seasons and years. Animals adjust to this […]

Meeting Abstract BERN-1  Sunday, Jan. 5 19:00 – 20:00  A Bird’s Eye View of Reproductive Endocrinology BENTLEY , GE; UC Berkeley gb7@berkeley.edu https://ib.berkeley.edu/labs/bentley/bentley/Welcome.html Puberty and reproduction are critical for the survival of all vertebrate species. Despite a long history of research, we still do not fully understand mechanisms underlying how puberty is initiated. Nor do we know […]

Nagahama, Y.; National Institute for Basic Biology, Okazaki, Japan: Howard Bern Lecture: The Plasticity of Fish Gender: An Evolutionary Basis for Sex Determination and Differentiation in Vertebrates In vertebrates, sex determination is a key event for the development of either testis or ovary. Among the vertebrates, fish exhibit a range of gonadal forms from gonochorism […]

Meeting Abstract BERN.1  Jan. 5  The Endocrine System just before the Backbone: Genomics of the Spineless SHERWOOD, NM; Univ. of Victoria, BC Canada nsherwoo@uvic.ca The nature of the endocrine system in animals that evolved just before the vertebrates has been difficult to study. Now, the release of the complete genome for two groups lacking a backbone, amphioxus […]

Meeting Abstract BERN.1  Friday, Jan. 4  Nonclassical steroid actions mediated by novel membrane receptors: lessons from studies in fish. THOMAS, Peter; University of Texas at Austin thomas@utmsi.utexas.edu Although there is extensive evidence that steroids can exert rapid, nongenomic (i.e. nonclassical) actions initiated at the cell surface by binding to specific membrane steroid receptors (mSRs), their identities remain […]

Meeting Abstract BERN.1  Monday, Jan. 5  VERTEBRATE PHOTOPERIODIC SIGNALLING SHARP, PJ; EDINBURGH UNIVERSITY peter.sharp@roslin.ed.ac.uk Photoperiodic time measurement is achieved through a hypothalamic pacemaker that generates a circadian rhythm of photoinducibilty. Coincidence of light and the photoinducible phase of this rhythm stimulates expression of TSH beta in pars tuberalis cells that results in a local increase in TSH […]

Meeting Abstract BERN.1  Tuesday, Jan. 5  Haruspication: Why Is The Endocrine System So Similar and Why Is It So Dissimilar Amongst Fishes? SCHRECK, C.B.; Oregon State University carl.schreck@oregonstate.edu The endocrine system of teleost fishes is remarkably stereotypic. However, this “fact” is contradicted by another, that there is a large amount of variation in the endocrinology between individuals, […]

Meeting Abstract BERN.1  Wednesday, Jan. 5  Putting the brakes on reproduction. Implications for conservation? Global climate change? WINGFIELD, J.C.; Univ. of California, Davis jcwingfield@ucdavis.edu Seasonal breeding is widespread in vertebrates and involves development of the gonads, actual onset of breeding activities (e.g. cycling in females) and termination resulting in regression of the reproductive system. Whereas males generally […]

Meeting Abstract BERN.1  Thursday, Jan. 5  How Does Juvenile Hormone Regulate Insect Metamorphosis and Reproduction? RIDDIFORD, Lynn M.; Janelia Farm Research Campus, HHMI riddifordl@janelia.hhmi.org Juvenile hormone (JH) both prevents the switching actions of ecdysone that are necessary for metamorphosis and regulates reproductive maturation in the adult. In holometabolous insect larvae, JH prevents the appearance of the ecdysone-induced, […]

Meeting Abstract BERN.1  Saturday, Jan. 5  Bern Lecture: Synthesizing research on the adaptable snowbird: geographic variation, seasonality, and evolutionary endocrinology KETTERSON, Ellen D.; Indiana University ketterso@indiana.edu Evolutionary endocrinology explores the role of endocrine systems in adaptive evolution by relating hormones to phenotypes to fitness. Three key concepts include hormonal pleiotropy, phenotypic integration, and hormones as agents of […]