The present study aims to the impact of seasonal variations on different forms fluoride in groundwater Maradi region. methodology consisted carrying out three (3) water sampling campaigns at periods, rainy season, hot season and cold season; respectively December 2019; May 2020 November 2020. results obtained show that levels ions exist variable ranging from traces 2.84 mg/L. These also that, w...

Observations of antipredator behavior in two troops of free-ranging Lemur catta were made during a 13-month study o f L. cattafeeding ecology. Both responses to and frequency o f encounters with other species were recorded. Ringtailed lemur antipredator calls differentiated between terrestrial and avian predators. L. catta responded to the Madagascar harrier hawk (Polyboroides radiatus) and the...

Determining the factors that influence migratory population abundance has been constrained by the inability to connect events in different periods of the annual cycle. Carry-over effects are events that occur in one season but influence individual success the following season and recent empirical evidence suggests that they may play an important role in migratory population dynamics. Using a lo...

Animals have to adjust their physiology to seasonal changes, in response to variation in food availability, social tactics and reproduction. I compared basal corticosterone and testosterone levels in free ranging striped mouse from a desert habitat, comparing between the sexes, breeding and philopatric non-breeding individuals, and between the breeding and the non-breeding season. I expected di...

The aims of this study were to analyze the within-group weekly metabolic power average (wMPA), acceleration zones (wAcZ), and deceleration (wDcZ), in starter non-starter professional soccer players, based on different periods full season (pre-, early-, mid-, end-season). Twenty-one players (age, 28.3 ± 3.8 years; height, 181.2 7.1 cm; body mass, 74.5 7.7 kg; BMI, 22.6 1.0 kg·m2) monitored durin...

In this paper, we present the results of mercury concentration in soils, buds and leaves of maple (Acer platanoides-Ap) and linden (Tilia platyphyllos-Tp) collected in four periods of the growing season of trees, i.e. in April (IV), June (VI), August (VIII) and November (IX) in 2013, from the area of Poznań city (Poland). The highest average concentration of mercury for 88 samples was determine...

A total of sixty-six young males were used to evaluate the effect of low (L), medium (M) and high (H) concentrations of dietary digestible energy received during the rearing seasons (autumn and spring) on the performance and main semen characteristics of males for artificial insemination selected by a high growth rate. Males reared during the spring season presented a significantly higher weigh...

BACKGROUND The fish family Sciaenidae has numerous species that produce sounds with superfast muscles that vibrate the swimbladder. These muscles form post embryonically and undergo seasonal hypertrophy-atrophy cycles. The family has been the focus of numerous passive acoustic studies to localize spatial and temporal occurrence of spawning aggregations. Fishes produce disturbance calls when han...

_____________________________________________________________ Different catalysts based on Y-zeolite, ZSM-5 and amorphous kaolin were prepared and characterized. The catalytic cracking of 1,3,5-triisopropylbenzene (1,3,5-TIPB), 1,4diisopropylbenzene (1,4-DIPB) and n-dodecane were used to investigate the effect of catalyst nature on the catalytic performance. Cracking the largest molecule (1,3,5...