http://www.jamesuvandyke.com/about-1 daily 0.75 2015-09-07 https://images.squarespace-cdn.com/content/v1/55558893e4b0c2b7c9db7071/1441521348098-MDFZHHKJ07O8I5BGDX1N/image-asset.jpeg About Me "Fishing" for pregnant female Southern Grass Skinks (Pseudemoia entrecasteauxii) for my research on placental evolution. Photo by Christopher Friesen https://images.squarespace-cdn.com/content/v1/55558893e4b0c2b7c9db7071/1441520954621-K9SXC9QMZOCOFVIJZVW7/image-asset.png About Me Adult male Great White Shark (Carcharodon carcharias) observed on a cage dive off Port Lincoln, South Australia https://images.squarespace-cdn.com/content/v1/55558893e4b0c2b7c9db7071/1441519698347-R38Z9M1ISEVVSW3P9BPC/30.png About Me With yet another adult female Broadshell Turtle (Chelodina expansa) during fieldwork in north-central Victoria http://www.jamesuvandyke.com/about daily 0.75 2019-07-04 https://images.squarespace-cdn.com/content/v1/55558893e4b0c2b7c9db7071/1441521348098-MDFZHHKJ07O8I5BGDX1N/image-asset.jpeg About Me "Fishing" for pregnant female Southern Grass Skinks (Pseudemoia entrecasteauxii) for my research on placental evolution. Photo by Christopher Friesen https://images.squarespace-cdn.com/content/v1/55558893e4b0c2b7c9db7071/1441519698347-R38Z9M1ISEVVSW3P9BPC/30.png About Me With yet another adult female Broadshell Turtle (Chelodina expansa) during fieldwork in north-central Victoria https://images.squarespace-cdn.com/content/v1/55558893e4b0c2b7c9db7071/1441520954621-K9SXC9QMZOCOFVIJZVW7/image-asset.png About Me Adult male Great White Shark (Carcharodon carcharias) observed on a cage dive off Port Lincoln, South Australia http://www.jamesuvandyke.com/popular-media daily 0.75 2017-05-18 https://images.squarespace-cdn.com/content/v1/55558893e4b0c2b7c9db7071/1439699938123-6WAF2PS06O62RG351SD0/image-asset.png Popular Media Hatchling Broad-Shelled Turtle (Chelodina expansa) https://images.squarespace-cdn.com/content/v1/55558893e4b0c2b7c9db7071/1495104420084-1JVIT8RBEMA9TUQCGQNV/turtle.jpg Popular Media https://images.squarespace-cdn.com/content/v1/55558893e4b0c2b7c9db7071/1439700169714-0JL2PSDEH9GSJLBLB6QA/image-asset.png Popular Media Releasing hatchling Murray Short-Necked Turtles (Emydura macquarii) at Lake Bonney while being filmed for ABC. Photo by Dr Ricky Spencer https://images.squarespace-cdn.com/content/v1/55558893e4b0c2b7c9db7071/1439700353705-3J4J5T7EMFQO4GCMS9JA/image-asset.jpeg Popular Media Embryonic Southern Grass Skink (Pseudemoia entrecasteauxii). Photo by Dr Oliver Griffith https://images.squarespace-cdn.com/content/v1/55558893e4b0c2b7c9db7071/1439700666974-BMGPEQX7ZJ5TYRZPBU9Z/image-asset.jpeg Popular Media Adult male Timber Rattlesnake (Crotalus horridus) ambush foraging https://images.squarespace-cdn.com/content/v1/55558893e4b0c2b7c9db7071/1495105133299-CEL33AXZQGHJA9356H88/image-asset.jpeg Popular Media http://www.jamesuvandyke.com/publications daily 0.75 2024-05-21 http://www.jamesuvandyke.com/home daily 1.0 2021-08-18 https://images.squarespace-cdn.com/content/v1/55558893e4b0c2b7c9db7071/1439703574914-3HVS7QJVRC5OT6LFE365/image-asset.jpeg Home All views on this website domain represent my own, and not those of my employer https://images.squarespace-cdn.com/content/v1/55558893e4b0c2b7c9db7071/1439701675619-F9D2L4PEDOPQ6DL96F9E/image-asset.jpeg Home Me with a gravid female Broad-Shelled Turtle (Chelodina expansa) before she laid eggs. http://www.jamesuvandyke.com/research daily 0.75 2019-07-03 https://images.squarespace-cdn.com/content/v1/55558893e4b0c2b7c9db7071/1441348797141-PVI99VRT0IR68IWLIHC5/image-asset.jpeg Research This image demonstrates placentotrophic reproductive allocation. Nutrients are provided to developing embryos after ovulation and fertilization via a placenta. The placenta typically allows a direct connection between the mother and her developing embryo. The increase in egg/embryo size indicates that the embryo receives a net gain of material from the mother during embryonic development. The red box indicates that the placenta is the main mechanism of reproductive allocation. https://images.squarespace-cdn.com/content/v1/55558893e4b0c2b7c9db7071/1441331256551-TVTUYQFSZUSRZ4YDXI85/image-asset.jpeg Research Model of the theoretical reproductive decision-making process a lizard or snake might use. Green items are "cues" a lizard might use to collect information about potential reproductive success, while blue items represent the hypothetical mechanisms that sense, interpret, and communicate those cues to the reproductive system. Reproduced from Van Dyke, J.U. 2014. Cues for reproduction in squamate reptiles. Pp 109-143 in Lizard Phylogeny and Reproductive Biology. Eds J.L. Rheubert, D.S. Siegel, and S.E. Trauth. CRC Press, Boca Raton, FL. https://images.squarespace-cdn.com/content/v1/55558893e4b0c2b7c9db7071/1441439246307-Q11GOW6Q2SQVFTDSRUB6/image-asset.jpeg Research The Kingston, TN slurry pond prior to the spill (linked from http://ecophys.fishwild.vt.edu/research/current-research-projects/kingston-coal-ash-spill/) https://images.squarespace-cdn.com/content/v1/55558893e4b0c2b7c9db7071/1441437372710-8YI0EQVL2O7T6L3LMR44/image-asset.jpeg Research Ultrasound image of an embryonic Boa constrictor, about halfway through pregnancy. The visible coils are the embryo's skeleton, while the white material surrounding the baby is yolk. https://images.squarespace-cdn.com/content/v1/55558893e4b0c2b7c9db7071/1495106533330-0SDPW38SKL2KAAU2OVFG/image-asset.jpeg Research With another broadshelled turtle https://images.squarespace-cdn.com/content/v1/55558893e4b0c2b7c9db7071/1439712615265-D3MLHH9R99ZDLJ73VS3R/hell.jpg Research Turtle trap in a permanent wetland impacted by agriculture, invasive lilypads, and carp https://images.squarespace-cdn.com/content/v1/55558893e4b0c2b7c9db7071/1463205988386-0UUUMC3GIDO2PW71BYOQ/A+massive+female+Murray+River+Short-Necked+turtle Research A massive female Murray River Short-Necked Turtle! https://images.squarespace-cdn.com/content/v1/55558893e4b0c2b7c9db7071/1441347755803-FB41GY7F5WXMBS16JJ3X/image-asset.jpeg Research This image demonstrates lecithotrophic reproductive allocation. Nutrients are laid down in the ovary as yolk, which is produced in the liver in a process called vitellogenesis. After ovulation, eggs are fertilized. In egg-laying (oviparous) species, the egg is then deposited in the environment to develop. In some live-bearing (viviparous) species, the yolk-provisioned embryo develops inside the mother prior to birth. The red box indicates that yolk deposition is the main mechanism of reproductive allocation. The shrink in egg size during embryonic development occurs because the embryo burns some portion of the energy in yolk to fulfill its energetic demands of growth. https://images.squarespace-cdn.com/content/v1/55558893e4b0c2b7c9db7071/1441443295895-9XUAUOD7TWE1GKYGUWGW/image-asset.png Research Adult female Spiny Softshell Turtle (Apalone spinifera), one of our primary study species https://images.squarespace-cdn.com/content/v1/55558893e4b0c2b7c9db7071/1439709771144-NOYE6MKWDI5XIANXUT0V/longneck.jpg Research Common Long-Necked Turtle (Chelodina longicollis) https://images.squarespace-cdn.com/content/v1/55558893e4b0c2b7c9db7071/1441439281628-NXBGKDM71BYUVQBY9ELW/image-asset.jpeg Research The Kingston, TN slurry pond after the spill (linked from http://ecophys.fishwild.vt.edu/research/current-research-projects/kingston-coal-ash-spill/) https://images.squarespace-cdn.com/content/v1/55558893e4b0c2b7c9db7071/1441442004502-GTI3KM2Z8TSRQVUP3CFL/DSC_7001.JPG Research A young River Cooter, Pseudemys concinna https://images.squarespace-cdn.com/content/v1/55558893e4b0c2b7c9db7071/1441437257712-UHKG6LR7F4ZWXYRUS6YF/image-asset.jpeg Research Sampling yolk, using an ultrasound machine, from an anesthetized pregnant female Kenyan Sand Boa (Eryx colubrinus) http://www.jamesuvandyke.com/teaching daily 0.75 2019-07-03 http://www.jamesuvandyke.com/citizen-science daily 0.75 2015-09-06 https://images.squarespace-cdn.com/content/v1/55558893e4b0c2b7c9db7071/1441506971144-C8XRTKYQBJV9JQRZ9KFU/image-asset.png Citizen Science https://images.squarespace-cdn.com/content/v1/55558893e4b0c2b7c9db7071/1441508741743-5SNATPSUNZUU6ALNVCUC/image-asset.png Citizen Science Taking a break with members of the Arkansas Herpetological Society on a long day monitoring an isolated population of Western Diamondback Rattlesnakes (Crotalus atrox) deep in the rugged Ouachita Mountains of Arkansas. Photo by Eric East https://images.squarespace-cdn.com/content/v1/55558893e4b0c2b7c9db7071/1441506615970-IQ4P4ABSZ15LXIZNIEAJ/image-asset.png Citizen Science http://www.jamesuvandyke.com/academic-opportunities daily 0.75 2019-08-07 https://images.squarespace-cdn.com/content/v1/55558893e4b0c2b7c9db7071/1562137081379-80KXXNHMAI7O01V2EL6O/Pseudemoia.jpg Academic Opportunities A Southern Grass Skink, Pseudemoia entrecasteauxii, one of the species we study as a model for placental evolution. http://www.jamesuvandyke.com/homebackup daily 0.75 2019-07-03 https://images.squarespace-cdn.com/content/v1/55558893e4b0c2b7c9db7071/1439701675619-F9D2L4PEDOPQ6DL96F9E/image-asset.jpeg Home-backup Me with a gravid female Broad-Shelled Turtle (Chelodina expansa) before she laid eggs. https://images.squarespace-cdn.com/content/v1/55558893e4b0c2b7c9db7071/1439703574914-3HVS7QJVRC5OT6LFE365/image-asset.jpeg Home-backup http://www.jamesuvandyke.com/mentorship-philosophy daily 0.75 2019-07-04 http://www.jamesuvandyke.com/why-study-in-alburywodonga daily 0.75 2019-07-04 https://images.squarespace-cdn.com/content/v1/55558893e4b0c2b7c9db7071/1562139258561-6VGDBX8HHUDE6F0JUWVP/Australia_relief_map.jpg Why study in Albury-Wodonga?