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Biological Bulletin

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https://www.readbyqxmd.com/read/27820909/novel-structures-associated-with-presumed-photoreceptors-in-the-aboral-sense-organ-of-ctenophores
#1
Sidney L Tamm
No abstract text is available yet for this article.
October 2016: Biological Bulletin
https://www.readbyqxmd.com/read/27820908/frontmatter
#2
(no author information available yet)
No abstract text is available yet for this article.
October 2016: Biological Bulletin
https://www.readbyqxmd.com/read/27820907/box-jellyfish-alatina-alata-has-a-circumtropical-distribution
#3
Jonathan W Lawley, Cheryl Lewis Ames, Bastian Bentlage, Angel Yanagihara, Roger Goodwill, Ehsan Kayal, Kikiana Hurwitz, Allen G Collins
Species of the box jellyfish (Cubozoa) genus Alatina are notorious for their sting along the beaches of several localities of the Atlantic and Pacific. These species include Alatina alata on the Caribbean Island of Bonaire (the Netherlands), A. moseri in Hawaii, and A. mordens in Australia. Most cubozoans inhabit coastal waters, but Alatina is unusual in that specimens have also been collected in the open ocean at great depths. Alatina is notable in that populations form monthly aggregations for spermcast mating in conjunction with the lunar cycle...
October 2016: Biological Bulletin
https://www.readbyqxmd.com/read/27820906/sea-hare-aplysia-punctata-mollusca-gastropoda-can-maintain-shell-calcification-under-extreme-ocean-acidification
#4
Nicholas Carey, Sam Dupont, Julia D Sigwart
Ocean acidification is expected to cause energetic constraints upon marine calcifying organisms such as molluscs and echinoderms, because of the increased costs of building or maintaining shell material in lower pH. We examined metabolic rate, shell morphometry, and calcification in the sea hare Aplysia punctata under short-term exposure (19 days) to an extreme ocean acidification scenario (pH 7.3, ∼2800 μatm pCO2), along with a group held in control conditions (pH 8.1, ∼344 μatm pCO2). This gastropod and its congeners are broadly distributed and locally abundant grazers, and have an internal shell that protects the internal organs...
October 2016: Biological Bulletin
https://www.readbyqxmd.com/read/27820905/covering-ground-movement-patterns-and-random-walk-behavior-in-aquilonastra-anomala-sea-stars
#5
Amanda C Lohmann, Dennis Evangelista, Lindsay D Waldrop, Christopher L Mah, Tyson L Hedrick
The paths animals take while moving through their environments affect their likelihood of encountering food and other resources; thus, models of foraging behavior abound. To collect movement data appropriate for comparison with these models, we used time-lapse photography to track movements of a small, hardy, and easy-to-obtain organism, Aquilonastra anomala sea stars. We recorded the sea stars in a tank over many hours, with and without a food cue. With food present, they covered less distance, as predicted by theory; this strategy would allow them to remain near food...
October 2016: Biological Bulletin
https://www.readbyqxmd.com/read/27820904/morphology-of-cyprid-attachment-organs-compared-across-disparate-barnacle-taxa-does-it-relate-to-habitat
#6
Hamad Al-Yahya, Hsi-Nien Chen, Benny K K Chan, Ryusuke Kado, Jens T Høeg
This study used morphometric analyses to compare the structure of the third antennular segment, also called the attachment organ, in cyprid larvae from cirripede species representing a diverse set of taxonomic groups. The aim was to investigate the degree of morphological variation in view of the diversity of habitats, settlement substrata, and modes of life found in the Cirripedia. In all cyprids the third segment features a flat surface (the attachment disc) covered with small cuticular villi thought to function in adhesion...
October 2016: Biological Bulletin
https://www.readbyqxmd.com/read/27820903/low-oxygen-levels-slow-embryonic-development-of-limulus-polyphemus
#7
Peter Funch, Tobias Wang, Cino Pertoldi, Ane Bruun Middelbo
The American horseshoe crab Limulus polyphemus typically spawns in the upper intertidal zone, where the developing embryos are exposed to large variations in abiotic factors such as temperature, humidity, salinity, and oxygen, which affect the rate of development. It has been shown that embryonic development is slowed at both high and low salinities and temperatures, and that late embryos close to hatching tolerate periodic hypoxia. In this study we investigated the influence of hypoxia on both early and late embryonic development in L...
October 2016: Biological Bulletin
https://www.readbyqxmd.com/read/27820902/effects-of-embryonic-exposure-to-salinity-stress-or-hypoxia-on-post-metamorphic-growth-and-survival-of-the-polychaete-capitella-teleta
#8
Jan A Pechenik, Oscar R Chaparro, Aaron Pilnick, Melissa Karp, Michael Acquafredda, Robert Burns
Although a good number of studies have investigated the impact of larval experience on aspects of post-metamorphic performance, only a few have considered the potential impact of stresses experienced by brooded embryos. In this study we separately investigated the impact of salinity stress (as low as 10) and hypoxia (1 ml O2 l(-1)) experienced by brooded embryos of the deposit-feeding polychaete Capitella teleta on hatching success, metamorphosis, post-metamorphic survival, and post-metamorphic growth. Salinity reduction from 30 to 10 or 15 reduced relative hatching success, presumably by reducing embryonic survival, but generally had no negative latent effects on juvenile survival or growth...
October 2016: Biological Bulletin
https://www.readbyqxmd.com/read/27682180/frontmatter
#9
(no author information available yet)
No abstract text is available yet for this article.
August 2016: Biological Bulletin
https://www.readbyqxmd.com/read/27682179/hardware-technologies-and-probe-development-in-light-microscopy-help-drive-discoveries-in-cell-biology-introduction-to-a-virtual-symposium-in-the-biological-bulletin
#10
Lisa A Cameron, Donna L McPhie
No abstract text is available yet for this article.
August 2016: Biological Bulletin
https://www.readbyqxmd.com/read/27638699/changes-in-editorship-and-publisher
#11
(no author information available yet)
No abstract text is available yet for this article.
August 2016: Biological Bulletin
https://www.readbyqxmd.com/read/27638698/erratum
#12
(no author information available yet)
No abstract text is available yet for this article.
August 2016: Biological Bulletin
https://www.readbyqxmd.com/read/27638697/living-cells-and-dynamic-molecules-observed-with-the-polarized-light-microscope-the-legacy-of-shinya-inou%C3%A3
#13
Tomomi Tani, Michael Shribak, Rudolf Oldenbourg
In 1948, Shinya Inoué arrived in the United States for graduate studies at Princeton. A year later he came to Woods Hole, starting a long tradition of summer research at the Marine Biological Laboratory (MBL), which quickly became Inoué's scientific home. Primed by his Japanese mentor, Katsuma Dan, Inoué followed Dan's mantra to work with healthy, living cells, on a fundamental problem (mitosis), with a unique tool set that he refined for precise and quantitative observations (polarized light microscopy), and a fresh and brilliant mind that was unafraid of challenging current dogma...
August 2016: Biological Bulletin
https://www.readbyqxmd.com/read/27638696/imaging-adenosine-triphosphate-atp
#14
Megha Rajendran, Eric Dane, Jason Conley, Mathew Tantama
Adenosine triphosphate (ATP) is a universal mediator of metabolism and signaling across unicellular and multicellular species. There is a fundamental interdependence between the dynamics of ATP and the physiology that occurs inside and outside the cell. Characterizing and understanding ATP dynamics provide valuable mechanistic insight into processes that range from neurotransmission to the chemotaxis of immune cells. Therefore, we require the methodology to interrogate both temporal and spatial components of ATP dynamics from the subcellular to the organismal levels in live specimens...
August 2016: Biological Bulletin
https://www.readbyqxmd.com/read/27638695/aurora-a-kinase-amplifies-a-midzone-phosphorylation-gradient-to-promote-high-fidelity-cytokinesis
#15
Anna A Ye, Julia Torabi, Thomas J Maresca
During cytokinesis, aurora B kinase (ABK) relocalizes from centromeres to the spindle midzone, where it is thought to provide a spatial cue for cytokinesis. While global ABK inhibition in Drosophila S2 cells results in macro- and multi-nucleated large cells, mislocalization of midzone ABK (mABK) by depletion of Subito (Drosophila MKLP2) does not cause notable cytokinesis defects. Subito depletion was, therefore, used to investigate the contribution of other molecules and redundant pathways to cytokinesis in the absence of mABK...
August 2016: Biological Bulletin
https://www.readbyqxmd.com/read/27638694/protein-corona-modulates-uptake-and-toxicity-of-nanoceria-via-clathrin-mediated-endocytosis
#16
Julie Mazzolini, Ralf J M Weber, Hsueh-Shih Chen, Abdullah Khan, Emily Guggenheim, Robert K Shaw, James K Chipman, Mark R Viant, Joshua Z Rappoport
Particles present in diesel exhaust have been proposed as a significant contributor to the development of acute and chronic lung diseases, including respiratory infection and allergic asthma. Nanoceria (CeO2 nanoparticles) are used to increase fuel efficiency in internal combustion engines, are present in exhaust fumes, and could affect cells of the airway. Components from the environment such as biologically derived proteins, carbohydrates, and lipids can form a dynamic layer, commonly referred to as the "protein corona" which alters cellular nanoparticle interactions and internalization...
August 2016: Biological Bulletin
https://www.readbyqxmd.com/read/27638693/using-stage-and-slit-scanning-to-improve-contrast-and-optical-sectioning-in-dual-view-inverted-light-sheet-microscopy-dispim
#17
Abhishek Kumar, Ryan Christensen, Min Guo, Panos Chandris, William Duncan, Yicong Wu, Anthony Santella, Mark Moyle, Peter W Winter, Daniel Colón-Ramos, Zhirong Bao, Hari Shroff
Dual-view inverted selective plane illumination microscopy (diSPIM) enables high-speed, long-term, four-dimensional (4D) imaging with isotropic spatial resolution. It is also compatible with conventional sample mounting on glass coverslips. However, broadening of the light sheet at distances far from the beam waist and sample-induced scattering degrades diSPIM contrast and optical sectioning. We describe two simple improvements that address both issues and entail no additional hardware modifications to the base diSPIM...
August 2016: Biological Bulletin
https://www.readbyqxmd.com/read/27638692/fast-fluorescence-microscopy-with-light-sheets
#18
Stephan Daetwyler, Jan Huisken
In light sheet microscopy, optical sectioning by selective fluorescence excitation with a sheet of light is combined with fast full-frame acquisition. This illumination scheme provides minimal photobleaching and phototoxicity. Complemented with remote focusing and multi-view acquisition, light sheet microscopy is the method of choice for acquisition of very fast biological processes, large samples, and high-throughput applications in areas such as neuroscience, plant biology, and developmental biology. This review explains why light sheet microscopes are much faster and gentler than other established fluorescence microscopy techniques...
August 2016: Biological Bulletin
https://www.readbyqxmd.com/read/27638691/impact-of-new-camera-technologies-on-discoveries-in-cell-biology
#19
Nico Stuurman, Ronald D Vale
New technologies can make previously invisible phenomena visible. Nowhere is this more obvious than in the field of light microscopy. Beginning with the observation of "animalcules" by Antonie van Leeuwenhoek, when he figured out how to achieve high magnification by shaping lenses, microscopy has advanced to this day by a continued march of discoveries driven by technical innovations. Recent advances in single-molecule-based technologies have achieved unprecedented resolution, and were the basis of the Nobel prize in Chemistry in 2014...
August 2016: Biological Bulletin
https://www.readbyqxmd.com/read/27638690/hardware-technologies-and-probe-development-in-light-microscopy-help-drive-discoveries-in-cell-biology-introduction-to-a-virtual-symposium-in-the-biological-bulletin
#20
Lisa A Cameron, Donna L McPhie
No abstract text is available yet for this article.
August 2016: Biological Bulletin
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