SEASONAL BEHAVIOR OF LARVAE OF CTENICERA SPP. AND OTHER WIREWORMS (COLEOPTERA:ELATERIDAE), IN RELATION TO TEMPERATURE, MOISTURE, FOOD, AND GRAVITY

1962 ◽  
Vol 40 (5) ◽  
pp. 697-718 ◽  
Author(s):  
Russell Y. Zacharuk
Keyword(s):  
Seasonal Variations ◽  
Seasonal Behavior ◽  
Feeding Activities ◽  
Dry Soil ◽  
Ctenicera Destructor

In a gradient, nearly mature larvae of Ctenicera destructor (Brown) aggregated at higher average temperatures than did those of C. aeripennis (Kby.), Hypolithus bicolor Esch., or Limonius pectoralis Lec. Larvae of C. destructor from a field in wheat were distributed at higher temperatures than were those from fallow, and larvae from fallow were distributed at higher temperatures with food than without, Larvae from most of the above populations showed significant seasonal variations in distribution in the temperature gradient.Larvae of C. destructor from fields in wheat and fallow avoided dry soil more at the higher than at the lower temperatures without food, and more at 50° and less at 86° than at 68° F with food. Those of H. bicolor preferred moister soils than did those of C. destructor when food was present.The feeding activities of larvae of the two Ctenicera spp. were similar. They attacked and destroyed about 10 times as many seeds as those of H. bicolor or L. pectoralis. The feeding activities of larvae of each of the four species varied significantly with seasons. Larvae of C. destructor from fields in wheat did not feed appreciably less than those from fallow during the frost-free seasons. The feeding activities of larvae from fallow were directly related to temperature in the range 50–86° F, and to moisture in the range 5–25% content by weight in loam soil.Larvae of C. destructor showed positive responses to gravity.

Environmental change and seasonal behavior of mastodons in the Great Lakes region inferred from stable isotope analysis

2014 ◽  
Vol 82 (2) ◽  
pp. 366-377 ◽  
Author(s):  
Jessica Z. Metcalfe ◽  
Fred J. Longstaffe
Keyword(s):  
Stable Isotope ◽  
Great Lakes ◽  
Stable Isotope Analysis ◽  
Seasonal Variations ◽  
Sampling Methods ◽  
Tooth Enamel ◽  
Isotope Analysis ◽  
Seasonal Behavior ◽  
Isotopic Analyses ◽  
Mammut Americanum

AbstractWe investigate seasonal variations in the diet and drinking water of four Great Lakes mastodon (Mammut americanum) specimens using stable isotope analysis of serially sampled inner-enamel bioapatite structural carbonate (δ13Csc, δ18Osc), and previously published bulk analyses. Isotopic analyses and thin section measurements showed that mastodon tooth enamel extension rates (~ 12–4 mm/yr, decreasing toward the cervix) were lower than those of mammoths or modern elephants. Mastodons had distinct and highly regular seasonal variations in δ13Csc and δ18Osc, which we interpret in the context of local glacial history and vegetation changes. Seasonal variations in δ18O were large but variations in δ13C were small, and may have been obscured if coarser sampling methods than our inner-enamel sampling approach were used. Thus, our approach may be particularly useful for understanding relatively small seasonal changes in δ13C within C3 environments. The seasonal patterns, though not entirely conclusive, suggest that the Ontario mastodons did not migrate over very long distances. Rather, the climate and seasonal dietary patterns of mastodons within the region changed over time, from ~ 12,400 to 10,400 14C yr BP (~ 15,000 – 12,000 cal yr BP). Insights gained using these methods can contribute to a better understanding of megafaunal extinctions and Paleoamerican lifeways.

scholarly journals Processes controlling the seasonal variations in <sup>210</sup>Pb and <sup>7</sup>Be at the Mt. Cimone WMO-GAW global station, Italy: a model analysis

2017 ◽  
Vol 17 (2) ◽  
pp. 1061-1080 ◽  
Author(s):  
Erika Brattich ◽  
Hongyu Liu ◽  
Laura Tositti ◽  
David B. Considine ◽  
James H. Crawford
Keyword(s):  
Seasonal Variations ◽  
Transport Model ◽  
Dominant Role ◽  
Meteorological Data ◽  
Seasonal Pattern ◽  
Global Precipitation Climatology Project ◽  
Data Set ◽  
Seasonal Behavior ◽  
Precipitation Scavenging ◽  
Model Driven

Abstract. We apply the Global Modeling Initiative (GMI) chemistry and transport model driven by NASA's MERRA assimilated meteorological data to simulate the seasonal variations in two radionuclide aerosol tracers (terrigenous 210Pb and cosmogenic 7Be) at the WMO-GAW station of Mt. Cimone (44°12′ N, 10°42′ E; 2165 m a.s.l.; Italy), which is representative of free-tropospheric conditions most of the year, during 2005 with an aim to understand the roles of transport and precipitation scavenging processes in controlling their seasonality. The total precipitation field in the MERRA data set is evaluated with the Global Precipitation Climatology Project (GPCP) observations, and generally good agreement is found. The model reproduces reasonably the observed seasonal pattern of 210Pb concentrations, characterized by a wintertime minimum due to lower 222Rn emissions and weaker uplift from the boundary layer and summertime maxima resulting from strong convection over the continent. The observed seasonal behavior of 7Be concentrations shows a winter minimum, a summer maximum, and a secondary spring maximum. The model captures the observed 7Be pattern in winter–spring, which is linked to the larger stratospheric influence during spring. However, the model tends to underestimate the observed 7Be concentrations in summer, partially due to the sensitivity to spatial sampling in the model. Model sensitivity experiments indicate a dominant role of precipitation scavenging (vs. dry deposition and convection) in controlling the seasonality of 210Pb and 7Be concentrations at Mt. Cimone.

Prediction Scheme of Railway Passenger Flow Based on Multiplicative Holt-Winters Model

2013 ◽  
Vol 416-417 ◽  
pp. 1949-1953
Author(s):  
Zhuo Min Wei ◽  
Hong Chao Song
Keyword(s):  
Seasonal Variations ◽  
Basic Theory ◽  
Experimental Results ◽  
Short Term ◽  
Seasonal Behavior ◽  
Passenger Flow ◽  
Prediction Scheme ◽  
Passenger Volume ◽  
China Railway ◽  
Railway Passenger

The railway passenger volume has an obvious seasonal behavior, and has volatility and instability. The features of it brings a lot of difficulties to forecast the volume in short-term. To investigate the trends and seasonal variations of railway passenger flow, we discuss multiplicative Holt-Winters model as a method. This paper states the basic theory and algorithm of the model, and provides the experimental results by using the data of China railway passenger volume in 2006 to 2010. The result shows the feasibility and effectiveness of the proposed approaches

scholarly journals Processes controlling the seasonal variations of <sup>210</sup>Pb and <sup>7</sup>Be at the Mt. Cimone WMO-GAW global station, Italy: A model analysis

2016 ◽  
Author(s):  
Erika Brattich ◽  
Hongyu Liu ◽  
Laura Tositti ◽  
David B. Considine ◽  
James H. Crawford
Keyword(s):  
Seasonal Variations ◽  
Transport Model ◽  
Dominant Role ◽  
Meteorological Data ◽  
Seasonal Pattern ◽  
Global Precipitation Climatology Project ◽  
Data Set ◽  
Seasonal Behavior ◽  
Precipitation Scavenging ◽  
Model Driven

Abstract. We apply the Global Modeling Initiative (GMI) chemistry and transport model driven by the NASA’s MERRA assimilated meteorological data to simulate the seasonal variations of two radionuclide aerosol tracers (terrigenous 210Pb and cosmogenic 7Be) at the WMO-GAW station of Mt. Cimone (44°12’ N, 10°42’ E, 2165 m a.s.l., Italy), which is representative of free-tropospheric conditions most of the year, during 2005 with an aim to understand the roles of transport and precipitation scavenging processes in controlling their seasonality. The total precipitation field in the MERRA data set is evaluated with the Global Precipitation Climatology project (GPCP) observations, and a generally good agreement is found. The model reproduces reasonably the observed seasonal pattern of 210Pb concentrations, characterized by a wintertime minimum due to lower 222Rn emissions and weaker uplift from the boundary layer and summertime maxima resulting from strong convection over the continent. The observed seasonal behavior of 7Be concentrations shows a winter minimum, a summer maximum, and a secondary spring maximum. The model captures the observed 7Be pattern in winter-spring, which is linked to the larger stratospheric influence during spring. However, the model tends to underestimate the observed 7Be concentrations in summer, partially due to the sensitivity to spatial sampling in the model. Model sensitivity experiments indicate a dominant role of precipitation scavenging (versus dry deposition and convection) in controlling the seasonality of 210Pb and 7Be concentrations at Mt. Cimone.

Seasonal variations in AADSAS applicants

1985 ◽  
Vol 49 (6) ◽  
pp. 445-447
Author(s):  
E Solomon ◽  
D Stoll
Keyword(s):  
Seasonal Variations

Seasonal variations in catecholamine output

1968 ◽  
Author(s):  
Gunn Johansson ◽  
Marianne Frankenhaeuser ◽  
William W. Lambert
Keyword(s):  
Seasonal Variations

Diurnal and seasonal variations in industrial fatigue of shift workers

1976 ◽  
Author(s):  
Andrzej Oginski ◽  
Lucyna Kozlakowska-Swigon ◽  
Janusz Pokorski
Keyword(s):  
Seasonal Variations ◽  
Shift Workers
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