Current Search: Embryology (x)
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- Title
- Generation of a Dichaete Gal4 strain in Drosophila Melanogaster.
- Creator
- Alif, Razan, Nambu, John R, Graduate College
- Date Issued
- 2011-04-08
- PURL
- http://purl.flvc.org/fcla/dt/3164456
- Subject Headings
- Drosophila melanogaster --Embryology, Mammals --Embryology, Y chromosome
- Format
- Document (PDF)
- Title
- Embryology of vestimentiferan tube worms from deep-sea methane/sulfide seeps.
- Creator
- Young, Craig M., Metaxas, Anna, Tyler, Paul A., Harbor Branch Oceanographic Institute
- Date Issued
- 1996
- PURL
- http://purl.flvc.org/FCLA/DT/3183792
- Subject Headings
- Vestimentiferans, Hydrothermal vent ecology, Embryology, Tube worms
- Format
- Document (PDF)
- Title
- Effects of mid-incubation egg movement on loggerhead (Caretta caretta) turtle hatch success and embryo development.
- Creator
- Ahles, Natasha M., Charles E. Schmidt College of Science, Department of Biological Sciences
- Abstract/Description
-
Due to an emergency status dune restoration project following Subtropical Storm Andrea in 2007 on Singer Island, Florida, nests needed to be moved during early to mid-incubation. Nesting success was compared between those moved mid-incubation, moved within 12h to either a native sand incubation area or a renourished sand incubation area, and those left in-situ. Nests moved within 12h to the native sand had a significantly larger proportion of pipped hatchlings. Nests moved mid-incubation had...
Show moreDue to an emergency status dune restoration project following Subtropical Storm Andrea in 2007 on Singer Island, Florida, nests needed to be moved during early to mid-incubation. Nesting success was compared between those moved mid-incubation, moved within 12h to either a native sand incubation area or a renourished sand incubation area, and those left in-situ. Nests moved within 12h to the native sand had a significantly larger proportion of pipped hatchlings. Nests moved mid-incubation had a significantly lower proportion of hatched eggs as well as emergent hatchlings. The stage in which embryonic development was arrested corresponded to the stage the embryos were in during the time of movement; indicating movement was the cause of death. When comparing nests moved within the initial 2.5 weeks of development to those moved after 2.5 weeks of development, there was no significant difference in hatching success.
Show less - Date Issued
- 2009
- PURL
- http://purl.flvc.org/FAU/221948
- Subject Headings
- Sea turtles, Embryology, Wildlife conservation
- Format
- Document (PDF)
- Title
- THE FINE STRUCTURE OF THE NOTOCHORD AND ADJACENT TISSUES OF AN EMBRYONIC TELEOST.
- Creator
- SCHOEN, THAD MALCOLM., Florida Atlantic University
- Abstract/Description
-
Paramyosin fibers were observed in newly born Gambusia affinis larvae. Extraction procedures specific for paramyosin apparently removed the protein as evidence by electron microscopic examination. Recrystallization and polyacrylamide gel electrophoresis have identified the fibers as relatively homogenous paramyosin protein. The midstage embryo did not possess paramyosin fibers; however, the notochord and adjacent tissues were observed to be in a state of rapid protein synthesis. Mitochondrial...
Show moreParamyosin fibers were observed in newly born Gambusia affinis larvae. Extraction procedures specific for paramyosin apparently removed the protein as evidence by electron microscopic examination. Recrystallization and polyacrylamide gel electrophoresis have identified the fibers as relatively homogenous paramyosin protein. The midstage embryo did not possess paramyosin fibers; however, the notochord and adjacent tissues were observed to be in a state of rapid protein synthesis. Mitochondrial association with nuclei and 'semi-rough' endoplasmic reticulum were seen. Mitochondria were shown to possess lamellar bodies, which may be a form of degeneration. Lamellar body formation observed in other species of animals is discussed.
Show less - Date Issued
- 1977
- PURL
- http://purl.flvc.org/fcla/dt/13865
- Subject Headings
- Notochord, Western mosquitofish, Fishes--Embryology
- Format
- Document (PDF)
- Title
- Morphology, larval development and distribution of Bathypera feminalba n. sp. (Ascidiacea: Pyuridae), a deep-water ascidian from the fjords and sounds of British Columbia.
- Creator
- Young, Craig M., Vazquez, Elsa, Harbor Branch Oceanographic Institute
- Date Issued
- 1995
- PURL
- http://purl.flvc.org/FCLA/DT/3327213
- Subject Headings
- Pyuridae, Ascidians, Sea squirts--Canada, Sea squirts--Embryology
- Format
- Document (PDF)
- Title
- Embryos of the deep-sea echinoid Echinus affinis require high pressure for development.
- Creator
- Young, Craig M., Tyler, Paul A., Harbor Branch Oceanographic Institute
- Date Issued
- 1993
- PURL
- http://purl.flvc.org/FCLA/DT/3343823
- Subject Headings
- Echinus, Sea urchins--Embryos, Sea urchins--Embryology
- Format
- Document (PDF)
- Title
- Extended pre-feeding period in planktotrophic larvae of the bathyal echinoidAspidodiadema Jacobyi.
- Creator
- Young, Craig M., Cameron, J. Lane, Eckelbarger, Kevin J., Harbor Branch Oceanographic Institute
- Date Issued
- 1989
- PURL
- http://purl.flvc.org/fau/fd/FA00007197
- Subject Headings
- Echinodermata, Echinodermata--Larvae, Echinoidea, Invertebrates--Embryology
- Format
- Document (PDF)
- Title
- Temperature limits to fertilization and early development in the tropical sea urchin Echinometra lucunter.
- Creator
- Sewell, Mary A., Young, Craig M., Harbor Branch Oceanographic Institute
- Date Issued
- 1999
- PURL
- http://purl.flvc.org/FCLA/DT/3331936
- Subject Headings
- Echinometra lucunter, Echinometra lucunter--Embryology, Sea urchins
- Format
- Document (PDF)
- Title
- Egg and larval development of laboratory-reared sergeant major, Abudefduf saxatilis (Pisces, Pomacentridae).
- Creator
- Alshuth, S. R., Tucker, John W., Jr., Hateley, J., Harbor Branch Oceanographic Institute
- Date Issued
- 1998
- PURL
- http://purl.flvc.org/FCLA/DT/3340504
- Subject Headings
- Abudefduf, Pomacentridae, Fishes--Larvae, Fishes--Eggs, Fishes--Embryology
- Format
- Document (PDF)
- Title
- Digit ratio (2D:4D) predicts communion in exploratory structural equation modeling of self-narratives.
- Creator
- Wong, Alexander E., Vallacher, Robin R., Florida Atlantic University, Charles E. Schmidt College of Science, Department of Psychology
- Abstract/Description
-
Agency and communion are fundamental dimensions underlying psychological processes. Although agency and communion are coherent dimensions, their origins, nature, stability differ across theoretical framework. Common to these frameworks are gender differences in agency and communion. The present study hypothesized that because agency and communion relate to gender, they may also relate to digit ratio. The present study is important because digit ratio may offer clues on the origins and nature...
Show moreAgency and communion are fundamental dimensions underlying psychological processes. Although agency and communion are coherent dimensions, their origins, nature, stability differ across theoretical framework. Common to these frameworks are gender differences in agency and communion. The present study hypothesized that because agency and communion relate to gender, they may also relate to digit ratio. The present study is important because digit ratio may offer clues on the origins and nature of agency and communion, and their gender differences. Agency and Communion factors were extracted from implicit linguistic measures obtained by LIWC analysis of selfnarratives. Exploratory structural equation modeling indicated communion related to digit ratio in men, and gender differences in communion. Although the results supported the distal, biological influences of communion argued by evolutionary accounts, the null finding agency was not related to digit ratio, while not directly interpretable, did not contradict socialization accounts of agency.
Show less - Date Issued
- 2014
- PURL
- http://purl.flvc.org/fau/fd/FA00004237
- Subject Headings
- Embryology, Human, Fingers -- Sex differences, Human body -- Social aspects, Psychophysiology, Self actualization (Psychology), Sex differentiation
- Format
- Document (PDF)
- Title
- Visual adaptations in sharks, skates and rays.
- Creator
- McComb, Dawn Michelle, Charles E. Schmidt College of Science, Department of Biological Sciences
- Abstract/Description
-
The central importance of vision to an organism is evident in the anatomical and physiological adaptations within the eye that can be correlated to the organism's behavior and ecology. The goal of this study was to perform a functional analysis of adaptations within the elasmobranch visual system. An integrative approach was used to examine morphological and physiological adaptations in several species and link these adaptations to phylogeny, locomotion, habitat, behavior and ecology....
Show moreThe central importance of vision to an organism is evident in the anatomical and physiological adaptations within the eye that can be correlated to the organism's behavior and ecology. The goal of this study was to perform a functional analysis of adaptations within the elasmobranch visual system. An integrative approach was used to examine morphological and physiological adaptations in several species and link these adaptations to phylogeny, locomotion, habitat, behavior and ecology. Functional aspects investigated were eye position, pupil shape, spectral sensitivity, temporal resolution, the extent of the visual field and ultimately the integration of the visual and electrosensory systems. The elasmobranch eye adapts to the light environment of its habitat. Sharks from similar habitats had similar spectral sensitivities such as the bonnethead and blacknose sharks, both maximally sensitive to blue light of 480 nm. The spectral sensitivity of the scalloped hammerhead, which lives in a different environment, was maximally sensitive to green light (530 nm). The temporal characteristics of the eye also matched habitat and lifestyle. Species experiencing variable light conditions exhibited increased critical flicker-fusion frequencies, such as the bonnethead (31 Hz) and scalloped hammerhead (27 Hz), in contrast to deeper or more nocturnal species such as the blacknose shark (18 Hz). Elasmobranch visual fields correlated to each species' lifestyle, habitat and foraging strategy. Expansive monocular views, including a 360° panoramic view in the yellow stingray, were measured in species that rely on vision for vigilance against predators., The Atlantic stingray possessed large binocular overlaps (72°), which provided depth perception useful for tracking prey. By comparison, the frontal binocular overlaps of hammerhead species were larger than sharks with a more conventional head shape.This study quantified the range of the electrosensory system and the exte the visual field of several shark species, confirming both systems overlap around the head facilitating near seamless visual and electrosensory sensory function relevant to prey detection. The findings of this study indicate that ambient environmental light strongly influenced the function of the elasmobranch eye and that the extent of species' visual fields correlated with aspects of their morphology, locomotion and ecology.
Show less - Date Issued
- 2009
- PURL
- http://purl.flvc.org/FAU/216410
- Subject Headings
- Visual discrimination, Chondrichthyes, Embryology, Form perception, Adaptation (Biology), Aquatic animals, Physiology
- Format
- Document (PDF)
- Title
- Differential expression of cardiac troponin T isoforms in normal and cardiac non-function mutant axolotl hearts.
- Creator
- Sferrazza, Gian Franco., Florida Atlantic University, Lemanski, Larry F.
- Abstract/Description
-
A recessive mutant gene, termed "c", for cardiac non-function in the Mexican axolotl, Ambystoma mexicanum, is responsible for the failure of myofibrillogenesis in cardiac nonfunction mutant embryonic hearts. Animals that are homozygous for the mutation (c/c) fail to develop beating hearts and consequently die. Thus, the Mexican axolotl has been a useful animal model to study embryonic heart development. Recently, the cardiac troponin T (cTnT) gene, along with three additional shorter isoforms...
Show moreA recessive mutant gene, termed "c", for cardiac non-function in the Mexican axolotl, Ambystoma mexicanum, is responsible for the failure of myofibrillogenesis in cardiac nonfunction mutant embryonic hearts. Animals that are homozygous for the mutation (c/c) fail to develop beating hearts and consequently die. Thus, the Mexican axolotl has been a useful animal model to study embryonic heart development. Recently, the cardiac troponin T (cTnT) gene, along with three additional shorter isoforms of the gene, were cloned from normal embryonic hearts. These isoforms are believed to be the alternately spliced forms of the full length gene. One of the isoforms cloned is missing a cardiac-specific exon. Real-time PCR reveals that homozygous recessive mutant embryos (c/c) exhibit a lower transcription level of the cTnT gene than wildtype animals (+/+ or +/c). Expression levels of each of the isoforms are compared in normal and mutant hearts using quantitative real-time PCR.
Show less - Date Issued
- 2006
- PURL
- http://purl.flvc.org/fcla/dt/13320
- Subject Headings
- Vertebrates--Embryology--Methodology, Muscles--Molecular aspects, Gene expression, Cell differentiation
- Format
- Document (PDF)
- Title
- Plasma Steroid Hormones in Loggerhead and Green Sea Turtle Hatchlings.
- Creator
- Reis, Andrea, Milton, Sarah L., Florida Atlantic University, Charles E. Schmidt College of Science, Department of Biological Sciences
- Abstract/Description
-
Florida’s sea turtle populations are increasing due to conservation efforts; however, sea turtle species are vulnerable to climate change. Turtles exhibit temperaturedependent sex determination, in which nest environment influences sex. Environmental changes may produce altered sex ratios that limit reproduction potential; therefore hatchling sex ratios should be monitored. Hatchlings are not externally sexually dimorphic, making sex identification difficult. This study established baseline...
Show moreFlorida’s sea turtle populations are increasing due to conservation efforts; however, sea turtle species are vulnerable to climate change. Turtles exhibit temperaturedependent sex determination, in which nest environment influences sex. Environmental changes may produce altered sex ratios that limit reproduction potential; therefore hatchling sex ratios should be monitored. Hatchlings are not externally sexually dimorphic, making sex identification difficult. This study established baseline plasma hormone concentrations in hatchling and post-hatchling green (Chelonia mydas) and loggerhead (Caretta caretta) sea turtles using High Performance Liquid Chromatography. Five hormones were assayed and were present in the majority of samples (testosterone: N.D.-10.12, progesterone: N.D.-0.43, estradiol: N.D.-4.78, estriol: N.D.-5.55 and estrone: N.D.-1.67 μg/mL). Plasma hormones did not distinguish hatchling sex because male and female ranges overlapped. Hormone concentrations varied with sex but also with incubation temperature, indicating that climate change could impact hatchling and posthatchling hormone profiles and thus could impact future fitness.
Show less - Date Issued
- 2016
- PURL
- http://purl.flvc.org/fau/fd/FA00004626
- Subject Headings
- Sea turtles--Embryology., Sea turtles--Habitat--Conservation., Sex determination, Genetic., Loggerhead turtle--Effect of temperature on., Developmental genetics.
- Format
- Document (PDF)
- Title
- Hatchling sex ratios and nest temperature-sex ratio response of three South Florida marine turtle species (Caretta caretta L., Chelona mydas L., and Dermochelys coriacea V.).
- Creator
- Rogers, Micah Marie., Charles E. Schmidt College of Science, Department of Biological Sciences
- Abstract/Description
-
South Florida's loggerhead (Caretta caretta), green (Chelonia mydas) and leatherback (Dermochelys coriacea) sea turtles hatchling have environmentally determined sex. The in situ nest mean hatchling sex ratios (SR) were highly female-biased : loggerhead F=0.89) and green turtle F=0.81; leatherback's SR was nearly balanced (0.55F). Nest temperatures and SRs differed between leatherbacks and loggerhead and green turtles. The latter two did not differ. The loggerhead response parameters were...
Show moreSouth Florida's loggerhead (Caretta caretta), green (Chelonia mydas) and leatherback (Dermochelys coriacea) sea turtles hatchling have environmentally determined sex. The in situ nest mean hatchling sex ratios (SR) were highly female-biased : loggerhead F=0.89) and green turtle F=0.81; leatherback's SR was nearly balanced (0.55F). Nest temperatures and SRs differed between leatherbacks and loggerhead and green turtles. The latter two did not differ. The loggerhead response parameters were estimated within biological limitations by both 50-65% of incubation and mean middle 1/3 temperature. The maximum middle 1/3 temperature was the best-fit predictor for green turtles. No best-fit sex ratio-temperature response could be identified for leatherbacks. Clutches incubating under natural conditions can vary greatly in SR ; TRT differences may account for differences among species' sex ratios.
Show less - Date Issued
- 2013
- PURL
- http://purl.flvc.org/fcla/dt/3361062
- Subject Headings
- Sex ratio, Sex determination, Genetic, Sea turtles, Nests, Sea turtles, Embryology, Loggerhead turtle, Nests, Loggerhead turtle, Effect of temperature on
- Format
- Document (PDF)
- Title
- Afferent projections to rhomboid nucleus of thalamus.
- Creator
- Owens, Michelle Ann, Florida Atlantic University, Vertes, Robert P.
- Abstract/Description
-
The midline thalamus of rats is anatomically and functionally part of the "limbic" thalamus. The midline thalamic rhomboid nucleus (RH) has not been well characterized. The rhomboid nucleus is located just dorsal to the reuniens nucleus (RE), and just ventral to the central medial nucleus (CeM) of the thalamus. Using the retrograde tracer fluorogold (FG) and anti-FG antibody, we examined afferent projections to RH in the rat. Control injections were also made in CeM and the submedial nucleus...
Show moreThe midline thalamus of rats is anatomically and functionally part of the "limbic" thalamus. The midline thalamic rhomboid nucleus (RH) has not been well characterized. The rhomboid nucleus is located just dorsal to the reuniens nucleus (RE), and just ventral to the central medial nucleus (CeM) of the thalamus. Using the retrograde tracer fluorogold (FG) and anti-FG antibody, we examined afferent projections to RH in the rat. Control injections were also made in CeM and the submedial nucleus of thalamus (SMT). The main sources of input to RH were from the anterior cingulate, agranular insular, orbital, and somatosensory cortices; the claustrum; the reticular nucleus of the thalamus; the posterior hypothalamus; and various brainstem structures. Based on patterns of the afferent projections, the role of RH in arousal, attention, and mnemonic functions is discussed.
Show less - Date Issued
- 2005
- PURL
- http://purl.flvc.org/fcla/dt/13220
- Subject Headings
- Rats as laboratory animals, Rats--Nervous system, Thalamus--Research, Rats--Embryology, Afferent pathways, Perceptual-motor processes, Sensorimotor integration
- Format
- Document (PDF)
- Title
- Myofibril-Inducing RNA (MIR) is essential for tropomyosin expression and myofibrillogenesis in axolotl hearts.
- Creator
- Zhang, Chi, Jia, Pingping, Huang, Xupei, Sferrazza, Gian Franco, Athauda, Gagani, Achary, Mohan P., Wang, Jikui, Lemanski, Sharon L., Lemanski, Larry F.
- Date Issued
- 2009-09-03
- PURL
- http://purl.flvc.org/fcla/dt/3327272
- Subject Headings
- Ambystoma mexicanum --embryology, Ambystoma mexicanum --genetics, Base Sequence, DNA, Complementary --genetics, Endoderm --physiology, Exons --genetics, Gene Expression Regulation, Developmental, Gene Knockdown Techniques, Genes, Recessive, Heart --embryology, Models, Genetic, Molecular Sequence Data, Muscle Proteins --biosynthesis, Muscle Proteins --genetics, Myocardial Contraction --physiology, Protein Isoforms, Reverse Transcriptase Polymerase Chain Reaction, Tropomyosin
- Format
- Document (PDF)