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Author (up) Atasever, M.; Bozkurt, Y. doi  openurl
  Title Effect of Different Photoperiod Regimes on Sperm Quality, Fecundity and Fertilization in Rainbow Trout (Oncorhynchus mykiss) Type Journal Article
  Year 2015 Publication Turkish Journal of Fisheries and Aquatic Sciences Abbreviated Journal Turk. J. Fish. Aquat. Sci.  
  Volume 15 Issue Pages 517-523  
  Keywords animals, fish, photoperiod, sperm, ovulation, fertilization, Oncorhynchus mykiss  
  Abstract The present study was carried out to determine effect of different photoperiod regimes on sperm quality parameters,

ovulation/spermiation time and hatchery performance of rainbow trout (Oncorhynchus mykiss) broodstock. The designation

was done as combination of different long and short photoperiod regimes such as: 18L:6D and 18D:6L (group I); 14L:10D

and 14D:10L (group II) and natural lighting (control group). All treatments were carried out as three replications at each

group.

As a result, the highest mean spermatozoa motility (83.0±2.1 %) and motility period (67.2±6.3 s) were determined in

control group. It was determined that the longest ovulation was occured in female rainbow trout broodstock at 265 days in

group I. Although the highest mean absolute egg productivity was determined as 3654.7±298.3 eggs/fish in group I, the

highest mean relative egg productivity was determined as 137.3±24.5 eggs/kg in control group. Furthermore, the highest mean

egg diameter (4.6±0.1 mm) and fertilization rate (87.0±2.5 %) were determined in control group. Statistical analyses revealed

that spermatozoa motility, spermatozoa motility period and spermatozoa density positively correlated with fertilization rate in

all photoperiod regimes (P>0.05). On the other hand, semen volume and semen pH negatively correlated with fertilization rate

in all photoperiod regimes (P>0.05). It is interesting to note that only statistically important positive correlation was

determined between relative fecundity and fertilization rate in 18L:6D/18D:6L photoperiod regime (r=0.452, P<0.05).

Consequently, results revealed that combined long and short artificial photoperiod regimes can advance ovulation and

spermiation and also can effect gamete quality and hatchery performance of rainbow trout during out-of-season spawning.
 
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  Call Number LoNNe @ schroer @ Serial 1570  
Permanent link to this record
 

 
Author (up) Atkins, S.; Husain, S.; Storey, A. url  openurl
  Title The Influence of Street Lighting on Crime and Fear of Crime". Type Journal Article
  Year 1991 Publication Crime prevention unit paper No. 28, London Home Office Abbreviated Journal  
  Volume Issue Pages  
  Keywords Public Safety  
  Abstract  
  Address  
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  Notes Approved no  
  Call Number LoNNe @ christopher.kyba @ Serial 454  
Permanent link to this record
 

 
Author (up) Atkinson, G.; Davenne, D. url  doi
openurl 
  Title Relationships between sleep, physical activity and human health Type Journal Article
  Year 2007 Publication Physiology & Behavior Abbreviated Journal Physiol Behav  
  Volume 90 Issue 2-3 Pages 229-235  
  Keywords Human Health; Activity Cycles/*physiology; Animals; Body Temperature/physiology; Exercise/*physiology; Health; Humans; Motor Activity/physiology; Pineal Gland/physiology; Sleep/*physiology; Wakefulness/physiology  
  Abstract Although sleep and exercise may seem to be mediated by completely different physiological mechanisms, there is growing evidence for clinically important relationships between these two behaviors. It is known that passive body heating facilitates the nocturnal sleep of healthy elderly people with insomnia. This finding supports the hypothesis that changes in body temperature trigger somnogenic brain areas to initiate sleep. Nevertheless, little is known about how the core and distal thermoregulatory responses to exercise fit into this hypothesis. Such knowledge could also help in reducing sleep problems associated with nocturnal shiftwork. It is difficult to incorporate physical activity into a shiftworker's lifestyle, since it is already disrupted in terms of family commitments and eating habits. A multi-research strategy is needed to identify what the optimal amounts and timing of physical activity are for reducing shiftwork-related sleep problems. The relationships between sleep, exercise and diet are also important, given the recently reported associations between short sleep length and obesity. The cardiovascular safety of exercise timing should also be considered, since recent data suggest that the reactivity of blood pressure to a change in general physical activity is highest during the morning. This time is associated with an increased risk in general of a sudden cardiac event, but more research work is needed to separate the influences of light, posture and exercise per se on the haemodynamic responses to sleep and physical activity following sleep taken at night and during the day as a nap.  
  Address Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Henry Cotton Campus, Webster Street, Liverpool L3 2ET, UK. G.Atkinson@ljmu.ac.uk  
  Corporate Author Thesis  
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  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0031-9384 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:17067643; PMCID:PMC2782301 Approved no  
  Call Number LoNNe @ kagoburian @ Serial 717  
Permanent link to this record
 

 
Author (up) Aubé, M. url  openurl
  Title Light pollution modeling and detection in a heterogeneous environment Type Journal Article
  Year 2007 Publication Proceedings of Starlight 2007 conference. La Palma, Spain. Abbreviated Journal  
  Volume Issue Pages  
  Keywords Skyglow  
  Abstract Few attempts have been made to measure aerosol optical depth (AOD) behaviour

during the night. One such method uses spectrally calibrated stars as reference targets

but the available number of stars is limited. This is especially true for urban sites where

artificial lighting hide most of these stars. In our research we attempt to provide an

alternate method one which exploits the artificial sky glow generated by light pollution.

To achieve that goal, we designed a new methodology which links a 3D light

pollution model with in situ light pollution spectral measurements obtained with our

detector called Spectrometer for aerosol night detection (SAND). The basic idea was to

adjust an AOD value into the model in order to fit the measured artificial sky brightness.

This method requires an accurate model that includes spatial heterogeneity in lighting

angular geometry, in lighting spectral dependence, in ground spectral reflectance and

in topography along with a detailed definition of the vertical atmospheric profile. This

model, named ILLUMINA, computes 1st and 2nd order molecular and aerosol scattering

as well as aerosol absorption. A correction for sub grid obstacles is also included.

These model features represent major improvements to previous light pollution models.

Therefore, new possibilities for light pollution studies will arise, many of which are of

particular interest to the astronomical community. In this paper we will present model

and detector features and some of the first results derived from ILLUMINA model. We

will also present our web based spatio-temporal Sky spectral luminance measurements

database project.
 
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  Notes Approved no  
  Call Number LoNNe @ kagoburian @ Serial 552  
Permanent link to this record
 

 
Author (up) Aubé, M. url  doi
openurl 
  Title Physical behaviour of anthropogenic light propagation into the nocturnal environment Type Journal Article
  Year 2015 Publication Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences Abbreviated Journal Philos Trans R Soc Lond B Biol Sci  
  Volume 370 Issue Pages 20140117  
  Keywords Skyglow; artificial light at night; light pollution; radiative transfer; atmospheric effects; scattering; methods; numerical; sensitivity analysis  
  Abstract Propagation of artificial light at night (ALAN) in the environment is now known to have non negligible consequences on fauna, flora and human health. These consequences depend on light levels and their spectral power distributions, which in turn rely on the efficiency of various physical processes involved in the radiative transfer of this light into the atmosphere and its interactions with the built and natural environment. ALAN can affect the living organisms by direct lighting and indirect lighting (scattered by the sky and clouds and/or reflected by local surfaces). This paper mainly focuses on the behaviour of the indirect light scattered under clear sky conditions. Various interaction processes between anthropogenic light sources and the natural environment are discussed. This work mostly relies on a sensitivity analysis conducted with the light pollution radiative transfer model, Illumina (Aubé et al. 2005: Light pollution modelling and detection in a heterogeneous environment: toward a night-time aerosol optical depth retrieval method. In Proc. SPIE 2005, vol. 5890, San Diego, California, USA). More specifically, the impact of (i) the molecular and aerosol scattering and absorption, (ii) the second order of scattering, (iii) the topography and obstacle blocking, (iv) the ground reflectance and (v) the spectrum of light devices and their angular emission functions are examined. This analysis considers different behaviour as a function of the distance from the city centre, along with different zenith viewing angles in the principal plane.  
  Address Département de physique, Cégep de Sherbrooke, Sherbrooke, Quebec, Canada  
  Corporate Author Thesis  
  Publisher Royal Society Place of Publication Editor  
  Language English Summary Language English Original Title  
  Series Editor Series Title The biological impacts of artificial light at night: from molecules to communities Abbreviated Series Title  
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  Area Expedition Conference  
  Notes Approved no  
  Call Number IDA @ john @ Serial 1115  
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