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Articles 31 - 37 of 37
Full-Text Articles in Entire DC Network
Neglected Nematodes: The Neurolenin Solution, Kevin M. Shea, Steven Williams
Neglected Nematodes: The Neurolenin Solution, Kevin M. Shea, Steven Williams
Chemistry: Faculty Publications
Over 1 billion people worldwide are affected by Neglected Topical Diseases (NTDs). This group of pathogens encapsulates viruses, bacteria and parasites, and disproportionately affects the world’s poorest and most vulnerable communities in Africa, Asia and Latin America. Lymphatic Filariasis (LF) is an NTD caused by a parasitic nematode infection. The larvae of these filarial nematode worms are transmitted via mosquito bites and disrupt the functioning of the infected individual’s lymphatic system. LF can be caused by three types of filarial worms, Wuchereria bancrofti, Brugia malayi and Brugia timori, which are transmitted by the Culex, Anopheles and Aedes mosquito families. Symptomatic …
Pyramidal Neurons Of The Zebrafish Tectum Receive Highly Convergent Input From Torus Longitudinalis, Elisabeth Demarco, Alexander L. Tesmer, Bruna Hech, Koichi Kawakami, Estuardo Robles
Pyramidal Neurons Of The Zebrafish Tectum Receive Highly Convergent Input From Torus Longitudinalis, Elisabeth Demarco, Alexander L. Tesmer, Bruna Hech, Koichi Kawakami, Estuardo Robles
Neuroscience: Faculty Publications
The torus longitudinalis (TL) is a midbrain structure unique to ray finned fish. Although previously implicated in orienting behaviors elicited by changes in ambient lighting, the role of TL in visual processing is not well-understood. TL is reciprocally connected to tectum and is the only known source of synaptic input to the stratum marginalis (SM) layer of tectal neuropil. Conversely, tectal pyramidal neurons (PyrNs) are the only identified tectal neuron population that forms a dendrite in SM. In this study we describe a zebrafish gal4 transgenic that labels TL neurons that project to SM. We demonstrate that the axonal TL …
The Zebrafish Visual System Transmits Dimming Information Via Multiple Segregated Pathways, Estuardo Robles, Nicholas P. Fields, Herwig Baier
The Zebrafish Visual System Transmits Dimming Information Via Multiple Segregated Pathways, Estuardo Robles, Nicholas P. Fields, Herwig Baier
Neuroscience: Faculty Publications
Vertebrate retinas contain circuits specialized to encode light level decrements. This information is transmitted to the brain by dimming-sensitive OFF retinal ganglion cells (OFF-RGCs) that respond to light decrements with increased firing. It is known that OFF-RGCs with distinct photosensitivity profiles form parallel visual channels to the vertebrate brain, yet how these channels are processed by first- and higher order brain areas has not been well characterized in any species. To address this question in the larval zebrafish visual system, we examined the visual response properties of a genetically identified population of tectal neurons with a defined axonal projection to …
Testosterone Amplifies The Negative Valence Of An Agonistic Gestural Display By Exploiting Receiver Perceptual Bias, Nigel K. Anderson, Martina Grabner, Lisa A. Mangiamele, Doris Preininger, Matthew J. Fuxjager
Testosterone Amplifies The Negative Valence Of An Agonistic Gestural Display By Exploiting Receiver Perceptual Bias, Nigel K. Anderson, Martina Grabner, Lisa A. Mangiamele, Doris Preininger, Matthew J. Fuxjager
Biological Sciences: Faculty Publications
Many animals communicate by performing elaborate displays that are incredibly extravagant and wildly bizarre. So, how do these displays evolve? One idea is that innate sensory biases arbitrarily favour the emergence of certain display traits over others, leading to the design of an unusual display. Here, we study how physiological factors associated with signal production influence this process, a topic that has received almost no attention. We focus on a tropical frog, whose males compete for access to females by performing an elaborate waving display. Our results show that sex hormones like testosterone regulate specific display gestures that exploit a …
Summer Research Fellowship Project Descriptions 2021, Clark Science Center's Summer Research Fellows Program
Summer Research Fellowship Project Descriptions 2021, Clark Science Center's Summer Research Fellows Program
SURF Abstracts (Women in Science)
A summary of research done by Smith College’s 2021 Summer Research Fellowship (SURF) Program participants. Ever since its 1967 start, SURF has been a cornerstone of Smith’s science education. Supervised by faculty mentor-advisors drawn from the Clark Science Center and connected to its eighteen science, mathematics, and engineering departments and programs and associated centers and units. At summer’s end, SURF participants were asked to summarize their research experiences for this publication.
An Interview With Michael Barresi, Michael J.F. Barresi, Alex Eve
An Interview With Michael Barresi, Michael J.F. Barresi, Alex Eve
Biological Sciences: Faculty Publications
Michael Barresi is Professor of Biological Sciences at Smith College, Northampton, MA, USA, where he uses the zebrafish to understand central nervous system development. Michael is also Program Director of the ‘Student Scientists’ outreach project and has made significant contributions to teaching developmental biology, including being co-author and illustrator of the textbook Developmental Biology, producing developmental documentaries and starting the Online Developmental Teaching Forums. He was awarded the 2021 Viktor Hamburger Outstanding Educator Prize from the Society of Developmental Biology (SDB). We caught up with Michael over Teams to hear more about his career and love of learning.
Direct And Indirect Effects Of Altered Temperature Regimes And Phenological Mismatches On Insect Populations, Mariana Abarca, Ryan Spahn
Direct And Indirect Effects Of Altered Temperature Regimes And Phenological Mismatches On Insect Populations, Mariana Abarca, Ryan Spahn
Biological Sciences: Faculty Publications
Climate change is transforming ecosystems by altering species ranges, the composition of communities, and trophic interactions. Here, we synthesize recent reviews and subsequent developments to provide an overview of insect ecological and evolutionary responses to altered temperature regimes. We discuss both direct responses to thermal stress and indirect responses arising from phenological mismatches, altered host quality, and changes in natural enemy activity. Altered temperature regimes can increase exposure to both cold and heat stress and result in phenological and morphological mismatches with adjacent trophic levels. Host plant quality varies in a heterogenous way in response to altered temperatures with both …