BECKMAN, B.R.*; SHIMIZU, M; GADBERRY, B; COOPER, K; National Marine Fisheries Service: Feeding rate, growth and plasma IGF-I and 41 kDa IGFBP levels in coho salmon. Insulin-like growth factor-I (IGF-I) is one of the primary endocrine mediators of growth in vertebrates. The actions of IGF-I are extensively modified by a family of IGF binding proteins […]

SKELLY, S. L.; JOHN-ALDER, H. B.; Rutgers University: Effects of testosterone on growth and behavior of the eastern fence lizards, Sceloporus undulatus. Sexual size dimorphism in Sceloporus undulatus results from a higher pre-maturational growth rate in females than in males. To gain insight into potential mechanisms of sex differences in growth, we studied behavior of […]

BOWDEN, RM*; HARMS, HK; JANZEN, FJ; Iowa State University; Iowa State University; Iowa State University: Age-Related Variation in Egg Size and Yolk Steroid Hormones in the Painted Turtle Egg size is thought to be constrained by pelvic aperture morphology in turtles. Given this potential constraint, females should optimize egg size such that they produce the […]

COX, R. M.; SKELLY, S. L.; JOHN-ALDER, H. B.; Rutgers University: Ontogenetic and mechanistic studies of growth and sexual size dimorphism in lizards Studies of sexual size dimorphism (SSD) have historically been dominated by an adaptive paradigm under which patterns of SSD are presumed to reflect differences in the selective forces acting on male versus […]

BERG, L. K.; DESAI, P.; AROPE, S.; KELLEY, K. M.; California State University, Long Beach: Insulin-like Growth Factor-binding Protein-2 (IGFBP-2) as a Possible Mediator for Angiotensin II (AngII) and Glucose-activated Kidney Mesangial Cells Kidney glomerular mesangial cells exhibit activated proliferation and an over-production of extracellular matrix (ECM) in diabetic kidney cells or in response to […]

LARSEN, D.A.*; COOPER, K.A.; SHIMIZU, M.; National Marine Fisheries Service, Seattle, WA.: In vivo effects of testosterone and 11-ketotestosterone on the GH-IGF-I axis (plasma GH, IGF-I, and putative IGFBP-3) in coho salmon, Oncorhynchus kisutch. Studies in fish have demonstrated significant interactions among the endocrine factors regulating growth and reproduction including stimulatory and inhibitory effects of […]

LAUFER, H; JOHNSON, M; DEMIR, N; TWIDY, K; CHANG, E; BAGSHAW, J; SOYEZ, D (CNRS Paris), VAN HERP, F (Nijmegen Netherlands); The University of Connecticut, Storrs; The University of Connecticut, Storrs &MBL, Woods Hole; The University of Connecticut, Storrs& MBL, Woods Hole; The University of Connecticut, Storrs&MBL, Woods Hole; Bodega Marine Lab, CA; Worcester Polytech […]

DICKHOFF, W.W.; Northwest Fisheries Science Center, Seattle; Univ. Washington, Seattle: ENDOCRINE CONTROL OF GROWTH IN VERTEBRATES: AN ALTERNATE VIEW The conventional view of endocrine control of vertebrate growth is the growth hormone-insulin-like growth factor axis (GH-IGF axis). Operation of the axis is usually described in the sequence of pituitary GH stimulating production of IGF, and […]

WATKINS, T.B.*; MCPEEK, M.A.; Macalester College, St. Paul, MN; Dartmouth College, Hanover, NH: Quantitative Genetics and the Foraging/Predation Risk Trade-Off in Green Frog Tadpoles Evolutionary genetic studies often examine traits that are ecologically important in that they are subject to selection in the wild. But when those traits are also responsible for shaping the distribution […]

SCHRADER, Matthew S; Florida State University, Tallahassee: Parental Effort and Parasite Resistance in the Red-bellied Woodpecker Traditionally, food limitation and nest predation were thought to be the major ecological forces shaping avian life histories. However, several recent studies have demonstrated a trade-off between reproductive effort and parasite resistance. These studies have led ecologists to reconsider […]