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https://www.readbyqxmd.com/read/29790171/individual-variation-population-specific-behaviours-and-stochastic-processes-shape-marine-migration-phenologies
#1
Cameron Freshwater, Marc Trudel, Terry D Beacham, Stéphane Gauthier, Stewart C Johnson, Chrys-Ellen Neville, Francis Juanes
1.The phenology of long distance migrations can influence individual fitness, moderate population dynamics, and regulate the availability of ecosystem services to other trophic levels. Phenology varies within and among populations, and can be influenced by conditions individuals experience both prior to departure and encounter en route. 2.Assessing how intrinsic and extrinsic factors (e.g. individual physical condition vs. environmental conditions) interact to influence variation in migratory phenologies across ecological scales is often limited due to logistical constraints associated with tracking large numbers of individuals from multiple populations simultaneously...
May 23, 2018: Journal of Animal Ecology
https://www.readbyqxmd.com/read/29781092/assimilation-of-nitrogen-and-carbon-isotopes-from-fish-diets-to-otoliths-as-measured-by-nanoscale-secondary-ion-mass-spectrometry
#2
Jen-Chieh Shiao, Kotaro Shirai, Kentaro Tanaka, Naoto Takahata, Yuji Sano, Sung-Yun Hsiao, Der-Chuen Lee, Yung-Che Tseng
RATIONALE: Nitrogen and carbon stable isotope ratios (δ15 N and δ13 C values) of carbonate-bound organic materials in otoliths can provide information to address the biological and ecological functions of fish. Correct interpretation of otolith δ15 N and δ13 C profiles requires knowledge of the metabolic routes of nitrogen and carbon isotopes. However, the isotopic assimilation of δ15 N and δ13 C compositions from diets to otoliths has rarely been investigated. METHODS: This study traced the daily nitrogen and carbon isotopic assimilation between diets and otoliths using nanoscale secondary ion mass spectrometry (NanoSIMS)...
May 21, 2018: Rapid Communications in Mass Spectrometry: RCM
https://www.readbyqxmd.com/read/29779876/linear-self-motion-cues-support-the-spatial-distribution-and-stability-of-hippocampal-place-cells
#3
Ryan E Harvey, Stephanie A Rutan, Gabrielle R Willey, Jennifer J Siegel, Benjamin J Clark, Ryan M Yoder
The vestibular system provides a crucial component of place-cell and head-direction cell activity [1-7]. Otolith signals are necessary for head-direction signal stability and associated behavior [8, 9], and the head-direction signal's contribution to parahippocampal spatial representations [10-14] suggests that place cells may also require otolithic information. Here, we demonstrate that self-movement information from the otolith organs is necessary for the development of stable place fields within and across sessions...
May 10, 2018: Current Biology: CB
https://www.readbyqxmd.com/read/29773841/ocular-counter-rolling-in-astronauts-after-short-and-long-duration-spaceflight
#4
Millard F Reschke, Scott J Wood, Gilles Clément
Ocular counter-rolling (OCR) is a reflex generated by the activation of the gravity sensors in the inner ear that stabilizes gaze and posture during head tilt. We compared the OCR measures that were obtained in 6 astronauts before, during, and after a spaceflight lasting 4-6 days with the OCR measures obtained from 6 astronauts before and after a spaceflight lasting 4-9 months. OCR in the short-duration fliers was measured using the afterimage method during head tilt at 15°, 30°, and 45°. OCR in the long-duration fliers was measured using video-oculography during whole body tilt at 25°...
May 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29771041/-analysis-of-118-cases-of-benign-paroxysmal-positional-vertigo-after-trauma
#5
H L Xue, C X Li, L X Duan, Y L Jing
Objective: The aim of this study is to retrospective analysis the clinic features of 118 cases of benign paroxysmal positional vertigo after trauma. Method: Analyzes clinic features of injury in 118 cases of benign paroxysmal positional vertigo after trauma, and classified and localized the craniocerebral trauma. The 118 cases were tested with different positioning tests in the sequence of Dix hallpike test and rolling test. Then, proper otolith manual reduction was given. Result: In 118 cases of BPPV after trauma including 35 cases of skull fracture, 6 cases of concussion, 17 cases of scalp hematoma, 28 cases of scalp laceration, 14 cases of mild brain contusion and 18 cases of head combined injury...
May 20, 2017: Journal of Clinical Otorhinolaryngology, Head, and Neck Surgery
https://www.readbyqxmd.com/read/29764776/vestibulo-cochlear-function-after-cochlear-implantation-in-patients-with-meniere-s-disease
#6
Raquel Manrique-Huarte, Diego Calavia, Laura Alvarez-Gomez, Alicia Huarte, Nicolás Perez-Fernández, Manuel Manrique
OBJECTIVES: To measure the auditory (pure tone audiometry and word recognition scores) and vestibular (video head impulse test and vestibular myogenic potentials) outcomes in patients diagnosed with Meniere's disease (MD) who underwent cochlear implantation. MATERIAL AND METHODS: This prospective study included 23 cochlear implant users with MD and 29 patients diagnosed with far-advanced otosclerosis (the control group). RESULTS: The preoperative mean pure tone average thresholds were 99 and 122...
April 2018: Journal of International Advanced Otology
https://www.readbyqxmd.com/read/29761056/pelagic-larval-duration-growth-rate-and-population-genetic-structure-of-the-tidepool-snake-moray-uropterygius-micropterus-around-the-southern-ryukyu-islands-taiwan-and-the-central-philippines
#7
Wen-Chien Huang, Jui-Tsung Chang, Chun Liao, Atsushi Tawa, Yoshiyuki Iizuka, Te-Yu Liao, Jen-Chieh Shiao
The relationships between pelagic larval duration (PLD) and geographic distribution patterns or population genetic structures of fishes remain obscure and highly variable among species. To further understand the early life history of the tidepool snake moray Uropterygius micropterus and the potential relationship between PLD and population genetic structure of this species, otolith microstructure and population genetics based on concatenated mtDNA sequence (cytochrome b and cytochrome oxidase subunit I, 1,336 bp) were analyzed for 195 specimens collected from eight locations around the southern Ryukyu Islands, Taiwan, and the central Philippines...
2018: PeerJ
https://www.readbyqxmd.com/read/29758497/growth-and-recovery-of-zebrafish-embryos-after-developmental-exposure-to-raw-and-ozonated-oil-sands-process-affected-water
#8
Danielle D Lyons, Christie Morrison, Danielle A Philibert, Mohamed Gamal El-Din, Keith B Tierney
Due to the increasing volume of oil sands process-affect water (OSPW) and its toxicity to aquatic organisms, it is important to fully understand its effects and study remediation processes that will enable its release to the environment. Ozone treatment is currently being considered as a tool to expedite remediation, as it is known to degrade toxic organic compounds present in OSPW. In this study, we aimed to measure the effects of OSPW exposure on the growth, development and recovery of zebrafish (Danio rerio) embryos...
May 7, 2018: Chemosphere
https://www.readbyqxmd.com/read/29756341/identifying-sagittal-otoliths-of-mediterranean-sea-gobies-variability-among-phylogenetic-lineages
#9
A Lombarte, M Miletić, M Kovačić, J L Otero-Ferrer, V M Tuset
In this study, we describe and analyse the morphology of the sagitta, the largest otolith, of 25 species of Gobiidae inhabiting the Adriatic and north-western Mediterranean seas. Our goal was to test the usefulness and efficiency of sagittal otoliths for species identification. Our analysis of otolith contours was based on mathematical descriptors called wavelets, which are related to multi-scale decompositions of contours. Two methods of classification were used: an iterative system based on 10 wavelets that searches the Anàlisi de Formes d'Otòlits (AFORO) database and a discriminant method based only on the fifth wavelet...
May 13, 2018: Journal of Fish Biology
https://www.readbyqxmd.com/read/29754095/linking-otolith-microchemistry-and-surface-water-contamination-from-natural-gas-mining
#10
David H Keller, Paula M Zelanko, Joel E Gagnon, Richard J Horwitz, Heather S Galbraith, David J Velinsky
Unconventional natural gas drilling and the use of hydraulic fracturing technology have expanded rapidly in North America. This expansion has raised concerns of surface water contamination by way of spills and leaks, which may be sporadic, small, and therefore difficult to detect. Here we explore the use of otolith microchemistry as a tool for monitoring surface water contamination from generated waters (GW) of unconventional natural gas drilling. We exposed Brook Trout in the laboratory to three volumetric concentrations of surrogate generated water (SGW) representing GW on day five of drilling...
May 10, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29745800/interaction-between-graviception-and-carotid-baroreflex-function-in-humans-during-parabolic-flight-induced-microgravity
#11
Shigehiko Ogoh, Michaël Marais, Romain Lericollais, Pierre Denise, Peter B Raven, Hervé Normand
The aim of the present study was to assess carotid baroreflex (CBR) during acute changes in otolithic activity in humans. To address this question, we designed a set of experiments to identify the modulatory effects of microgravity on CBR function at a tilt angle of -2{degree sign}, which was identified to minimize changes in central blood volume during parabolic flight. During parabolic flight at 0g and 1g, CBR function curves were modelled from the heart rate (HR) and mean arterial pressure (MAP) responses to rapid pulse trains of neck pressure (NP) and neck suction (NS) ranging from +40 to -80 Torr; CBR control of HR (carotid-HR) and MAP (carotid-MAP) baroreflex function curves, respectively...
May 10, 2018: Journal of Applied Physiology
https://www.readbyqxmd.com/read/29741068/-otolith-carbon-and-oxygen-stable-isotopes-in-laboratory-reared-schizothorax-kozlovi
#12
Yong Feng He, Xing Bing Wu, Xu Ge Wang, Yong Jiu Zhu, De Guo Yang
In order to investigate the role of otolith carbon (δ13 C) and oxygen (δ18 O) stable isotopes in identification of freshwater fish stocks, otolith δ13 C and δ18 O of cultured Schizothorax kozlovi at different ages were measured by stable isotope mass spectrometer. The relationships between otolith δ13 C / δ18 O and environment were discussed. The results showed that δ13 C and δ18 O values of S. kozlovi at age 1+ were not significantly correlated with otolith mass, but both were significantly different between lapillus and asteriscus...
July 18, 2017: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29738611/influence-of-graviceptors-stimulation-initiated-by-off-vertical-axis-rotation-on-ventilation
#13
O Kuldavletova, S Marie, P Denise, H Normand
NEW FINDINGS: What is the central question of this study? It is known that respiration is affected by graviceptors, but it remains unclear to what extent labyrinthine and non-labyrinthine graviceptors are involved in this process. What is the main finding and its importance? Our results suggest that the respiration modulation is not a result of a simple reflex arc, but that it involves a higher integration of different types of receptors with variable contribution of either type of graviceptors among subjects...
May 8, 2018: Experimental Physiology
https://www.readbyqxmd.com/read/29729011/larval-traits-show-temporally-consistent-constraints-but-are-decoupled-from-post-settlement-juvenile-growth-in-an-intertidal-fish
#14
Joshua A Thia, Cynthia Riginos, Libby Liggins, Will F Figueira, Katrina McGuigan
1.Complex life-cycles may evolve to dissociate distinct developmental phases in an organism's lifetime. However, genetic or environmental factors may restrict trait independence across life stages, constraining ontogenetic trajectories. Quantifying covariance across life-stages and their temporal variability is fundamental in understanding life-history phenotypes and potential distributions and consequences for selection. 2.We studied developmental constraints in an intertidal fish (Bathygobius cocosensis: Gobiidae) with a discrete pelagic larval phase and benthic juvenile phase...
May 5, 2018: Journal of Animal Ecology
https://www.readbyqxmd.com/read/29723211/using-an-integral-projection-model-to-assess-the-effect-of-temperature-on-the-growth-of-gilthead-seabream-sparus-aurata
#15
F J Heather, D Z Childs, A M Darnaude, J L Blanchard
Accurate information on the growth rates of fish is crucial for fisheries stock assessment and management. Empirical life history parameters (von Bertalanffy growth) are widely fitted to cross-sectional size-at-age data sampled from fish populations. This method often assumes that environmental factors affecting growth remain constant over time. The current study utilized longitudinal life history information contained in otoliths from 412 juveniles and adults of gilthead seabream, Sparus aurata, a commercially important species fished and farmed throughout the Mediterranean...
2018: PloS One
https://www.readbyqxmd.com/read/29722240/-sagittal-otolith-morphology-and-the-relationship-between-its-mass-and-the-age-of-liza-haematocheila-in-the-yangtze-estuary-china
#16
Yan Ji, Feng Zhao, Qin Yang, Rong Rong Ma, Gang Yang, Tao Zhang, Ping Zhuang
To examine the relationship of morphological characters of sagittal otolith and the age of Liza haematocheila in the Yangtze Estuary, we analyzed the morphological parameters of 324 pairs of otoliths extracted from 358 L. haematocheila specimens from the Yangtze Estuary in February to June of 2017. The results showed that sagittal otolith had rostrum, antirostrum and obvious central notch. The size and shape of sagittal otolith significantly changed with their growth, from regular melon seeds shape outline to long narrow leaf shape and increasing irregular wavy outline...
March 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29719527/vestibular-evoked-myogenic-potentials-in-bilateral-vestibulopathy
#17
REVIEW
Sally M Rosengren, Miriam S Welgampola, Rachael L Taylor
Bilateral vestibulopathy (BVP) is a chronic condition in which patients have a reduction or absence of vestibular function in both ears. BVP is characterized by bilateral reduction of horizontal canal responses; however, there is increasing evidence that otolith function can also be affected. Cervical and ocular vestibular-evoked myogenic potentials (cVEMPs/oVEMPs) are relatively new tests of otolith function that can be used to test the saccule and utricle of both ears independently. Studies to date show that cVEMPs and oVEMPs are often small or absent in BVP but are in the normal range in a significant proportion of patients...
2018: Frontiers in Neurology
https://www.readbyqxmd.com/read/29702184/multisensory-vestibular-vestibular-auditory-and-auditory-network-effects-revealed-by-parametric-sound-pressure-stimulation
#18
Sun-Young Oh, Rainer Boegle, Matthias Ertl, Thomas Stephan, Marianne Dieterich
Multisensory convergence and sensorimotor integration are important aspects for the mediation of higher vestibular cognitive functions at the cortical level. In contrast to the integration of vestibulo-visual or vestibulo-tactile perception, much less is known about the neural mechanism that mediates the integration of vestibular-otolith (linear acceleration/translation/gravity detection) and auditory processing. Vestibular-otolith and auditory afferents can be simultaneously activated using loud sound pressure stimulation, which is routinely used for testing cervical and ocular vestibular evoked myogenic potentials (VEMPs) in clinical neurotological testing...
April 24, 2018: NeuroImage
https://www.readbyqxmd.com/read/29692756/hierarchical-cluster-analysis-of-semicircular-canal-and-otolith-deficits-in-bilateral-vestibulopathy
#19
Alexander A Tarnutzer, Christopher J Bockisch, Elena Buffone, Konrad P Weber
Background: Gait imbalance and oscillopsia are frequent complaints of bilateral vestibular loss (BLV). Video-head-impulse testing (vHIT) of all six semicircular canals (SCCs) has demonstrated varying involvement of the different canals. Sparing of anterior-canal function has been linked to aminoglycoside-related vestibulopathy and Menière's disease. We hypothesized that utricular and saccular impairment [assessed by vestibular-evoked myogenic potentials (VEMPs)] may be disease-specific also, possibly facilitating the differential diagnosis...
2018: Frontiers in Neurology
https://www.readbyqxmd.com/read/29690490/review-of-the-steatiticus-species-group-of-the-cuskeel-genus-neobythites-ophidiidae-from-the-indo-pacific-with-description-of-two-new-species
#20
Franz Uiblein, JØrgen G Nielsen
This review was motivated by the recent collection of a specimen of the specious cuskeel genus Neobythites (Ophidiidae) off Myanmar and difficulties to identify it based on the available literature. This specimen has an ocellus consisting of a dark oval spot and a concentric white ring placed on the dorsal fin at mid-body, typical for many Neobythites species. It belongs to a group of single-ocellus bearing species which have no or only one weakly developed, flat preopercular spine which we term here the "steatiticus-species group"...
February 26, 2018: Zootaxa
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