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Keywords: embryo
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Journal Articles
J Exp Biol (2020) 223 (19): jeb229278.
Published: 12 October 2020
... the electrical activation of developing reptile ventricles . J. Exp. Biol.   221 , jeb178400 . 10.1242/jeb.178400 Hamburger , V. and Hamilton , H. L. ( 1951 ). A series of normal stages in the development of the chick embryo . J. Morphol.   88 , 49 - 92 . 10.1002/jmor.1050880104...
Journal Articles
J Exp Biol (2019) 222 (14): jeb206839.
Published: 19 July 2019
..., suggesting a cost of reproduction at high elevation. Transplanted females and females native to different elevations did not differ in reproductive output (clutch size, egg mass, relative clutch mass or embryonic stage at oviposition) or in post-oviposition body condition. Developing embryos reduced heart...
Includes: Supplementary data
Journal Articles
J Exp Biol (2019) 222 (13): jeb199984.
Published: 28 June 2019
...) are reliable cues to indicate an imminent danger in a specific habitat and often mediate the development of inducible defenses. Amphibian and fish embryos have been shown to acquire this information while at the embryonic stage of development, in relation to the developing nervous system and sensory...
Journal Articles
J Exp Biol (2018) 221 (22): jeb182600.
Published: 14 November 2018
... corticosterone is metabolized, and less than 1% of the corticosterone dose reaches the embryo as free corticosterone. We also found that exogenous dosing of corticosterone, in concentrations sufficient to overwhelm embryonic metabolism, reduces embryonic survival and negatively impacts hatchling traits important...
Journal Articles
J Exp Biol (2017) 220 (4): 625–633.
Published: 15 February 2017
... status of late-stage embryos. T-treated embryos had a larger body size but a smaller brain than controls. Males had a larger brain than females, controlling for overall size. T treatment differentially affected brain mass and total amount of pro-oxidants in the brain depending on laying order. T...
Journal Articles
J Exp Biol (2013) 216 (23): 4415–4425.
Published: 01 December 2013
... embryos and larvae and optimized several techniques for measuring hematological parameters on microliter (0.5–2.0 μl) blood samples. In chronic hypoxia (30% of oxygen saturation), stage-matched embryos and larvae possessed half the Hb concentration, erythrocyte counts and hematocrit observed in normoxia...
Journal Articles
J Exp Biol (2013) 216 (8): 1405–1411.
Published: 15 April 2013
..., larval and juvenile crabs exposed to two pH conditions (pH 7.9 and 7.6). Embryos and larvae were split by brood between the pH treatments for 9 days to examine brood-specific responses to low pH. Hatching success did not differ between pH conditions, but ranged from 30% to 95% among broods. Larval...
Includes: Supplementary data
Journal Articles
J Exp Biol (2013) 216 (8): 1412–1422.
Published: 15 April 2013
... developmental stages and to examine whether the effects were more pronounced in larval stages developing in the open ocean. Oxygen consumption rate, total protein, dry mass, total lipids and C/N were determined in late-stage embryos, zoea I larvae and newly settled juveniles reared in ambient pH (7.93±0.06...
Journal Articles
J Exp Biol (2012) 215 (23): 4125–4130.
Published: 01 December 2012
... of the sensory system in cuttlefish in ovo . Embryos of stage 23, 25 and 30 received a tactile, chemical or visual stimulus. An increase of mantle contraction rhythm was taken to indicate a behavioral response to the stimulus. We clearly demonstrated that tactile and chemical systems are functional from stage 23...
Journal Articles
J Exp Biol (2012) 215 (1): 141–151.
Published: 01 January 2012
... embryos of diverse invertebrates may therefore permit vertical migration in nature. I used turbulent and laminar shear flows to investigate: (1) the speed and direction of transport of non-motile and newly swimming stages of the echinoids Dendraster excentricus and Strongylocentrotus purpuratus...
Journal Articles
J Exp Biol (2010) 213 (19): 3340–3347.
Published: 01 October 2010
...) on the mesometrial side of the uterus expands as the embryo grows, providing a large vascular area for physiological exchange between mother and embryo. The VDE is already developed in females with newly ovulated eggs, and is situated directly adjacent to the chorioallantois of the embryo when it develops...
Journal Articles
J Exp Biol (2009) 212 (20): 3296–3304.
Published: 15 October 2009
... transition is poorly understood. Using eggs of the sphingid moth Manduca sexta , we show that longitudinal tracheae in embryos fill with gas in less than 5 s, without invasion of external air, by a process of cavitation. Cavitation requires that tracheal liquids be under tension, and we propose two...
Includes: Multimedia, Supplementary data
Journal Articles
J Exp Biol (2009) 212 (11): 1745–1752.
Published: 01 June 2009
... physiological evidence in other species. e-mail: pphwang@gate.sinica.edu.tw 21 1 2009 2009 mitochondria-rich cells embryo ion regulation acid–base regulation Homeostasis of body fluids is vital for vertebrates including fish. Compared with terrestrial vertebrates, fish face...
Journal Articles
J Exp Biol (2009) 212 (4): 566–575.
Published: 15 February 2009
... properties could allow prey to distinguish predator from benign-source vibrations. Red-eyed treefrog embryos detect egg predators using vibrations excited during attacks, hatching rapidly and prematurely to escape. We recorded vibrations in egg clutches during attacks by five species of predators and three...
Journal Articles
J Exp Biol (2008) 211 (24): 3800–3807.
Published: 15 December 2008
...Sarah J. Andrewartha; Nicola J. Mitchell; Peter B. Frappell SUMMARY The terrestrial embryos of many amphibians obtain water in two ways; in a liquid phase from the substrate on which eggs are deposited, and in a vapour phase from the surrounding atmosphere. We tested whether the mode of water flux...
Journal Articles
J Exp Biol (2008) 211 (6): 883–889.
Published: 15 March 2008
...Sheva Khorrami; Hiroshi Tazawa; Warren Burggren SUMMARY The extent to which hematocrit (Hct) is regulated and the impact of altered Hct on blood oxygen transport in avian embryos are largely unknown. Consequently, we investigated how acute blood removal or Ringer solution injection modified Hct...
Journal Articles
J Exp Biol (2008) 211 (5): 790–797.
Published: 01 March 2008
...H. Arthur Woods; Amy L. Moran SUMMARY We developed a novel diffusion–reaction model to describe spatial and temporal changes in oxygen concentrations in gelatinous egg masses containing live, respiring embryos. We used the model in two ways. First, we constructed artificial egg masses of known...
Journal Articles
J Exp Biol (2006) 209 (24): 5017–5028.
Published: 15 December 2006
...Miles D. Lamare; Mike F. Barker; Michael P. Lesser; Craig Marshall SUMMARY To determine if an Antarctic species repairs DNA at rates equivalent to warmer water equivalents, we examined repair of UV-damaged DNA in echinoid embryos and larvae. DNA repair by photoreactivation was compared in three...
Journal Articles
J Exp Biol (2006) 209 (16): 3055–3061.
Published: 15 August 2006
... instead of the female. Embryos develop in close association with the brood pouch epithelium in a manner that bears some resemblance to embryo-placental relationships in mammals. We have explored the hypothesis that parental body size and age should affect offspring postnatal growth and survival if brood...
Journal Articles
J Exp Biol (2006) 209 (10): 1874–1882.
Published: 15 May 2006
...Marcie M. Ninness; E. Don Stevens; Patricia A. Wright SUMMARY We investigated the effects of the chorion on movement and growth in rainbow trout ( Oncorhynchus mykiss ) embryos. To test if the chorion restricts movement and growth before hatching, we manually removed the chorion 3–6 days before...