Effects of Drinking Water Temperature on Laying Hens Subjected to Warm Cyclic Environmental Conditions

2013 ◽  
Author(s):  
M. C. Puma H. Xin R. S. Gates D. U. Ahn
Keyword(s):  
Drinking Water ◽  
Water Temperature ◽  
Environmental Conditions ◽  
Laying Hens

scholarly journals Pengaruh Pengaturan Waktu Pemberian Air Minum yang Berbeda Temperatur terhadap Performan Ayam Petelur Periode Grower

2017 ◽  
Vol 9 (2) ◽  
pp. 77
Author(s):  
Dede Risnajati
Keyword(s):  
Drinking Water ◽  
Body Weight ◽  
Water Temperature ◽  
Key Words ◽  
Laying Hens ◽  
Feed Conversion ◽  
Growing Period ◽  
Randomized Design ◽  
Two Factors ◽  
Water Provision

<p>The purpose of this study was to investigate the effect of interaction between drinking<br />water provision and drinking water temperature on performance of growing period laying hens. The research used Complete Randomized Design factorial pattern with two factors. The first factor consisted of five times of drinking water provision, ie, without restriction (WO), reduction in the provision of drinking water 2 hours (W1), 3 hours (W2), 4 hours (W3), and 5 hours per day (W4). The second factor consisted of two drinking water temperatures: 25-27 °C (T0) and 21-23 °C (T1). Each treatment was repeated 3 times and each replication consisted of five chickens. Data were analyzed with analysis of variance and continued with Duncan’s test. There was interaction between drinking water provision and drinking water temperature on body weight and feed conversion. The 2-hour reduction of drinking water provision per day with water temperature 21-23 °C produced the best performance of laying hens in growing period.</p><p>Key words: laying hens, performance, grower, drinking water</p>

scholarly journals Pengaruh Pengaturan Waktu Pemberian Air Minum yang Berbeda Temperatur terhadap Performan Ayam Petelur Periode Grower

2017 ◽  
Vol 9 (2) ◽  
pp. 77
Author(s):  
Dede Risnajati
Keyword(s):  
Drinking Water ◽  
Body Weight ◽  
Water Temperature ◽  
Key Words ◽  
Laying Hens ◽  
Feed Conversion ◽  
Growing Period ◽  
Randomized Design ◽  
Two Factors ◽  
Water Provision

<p>The purpose of this study was to investigate the effect of interaction between drinking<br />water provision and drinking water temperature on performance of growing period laying hens. The research used Complete Randomized Design factorial pattern with two factors. The first factor consisted of five times of drinking water provision, ie, without restriction (WO), reduction in the provision of drinking water 2 hours (W1), 3 hours (W2), 4 hours (W3), and 5 hours per day (W4). The second factor consisted of two drinking water temperatures: 25-27 °C (T0) and 21-23 °C (T1). Each treatment was repeated 3 times and each replication consisted of five chickens. Data were analyzed with analysis of variance and continued with Duncan’s test. There was interaction between drinking water provision and drinking water temperature on body weight and feed conversion. The 2-hour reduction of drinking water provision per day with water temperature 21-23 °C produced the best performance of laying hens in growing period.</p><p>Key words: laying hens, performance, grower, drinking water</p>

scholarly journals Drinking water temperature effects on laying hens subjected to warm cyclic environments

2002 ◽  
Vol 81 (5) ◽  
pp. 608-617 ◽  
Author(s):  
H Xin ◽  
RS Gates ◽  
MC Puma ◽  
DU Ahn
Keyword(s):  
Drinking Water ◽  
Water Temperature ◽  
Temperature Effects ◽  
Laying Hens

The Relationship between Concentration and Sensory Properties of 2-Methylisoborneol and Geosmin in Drinking Water

1988 ◽  
Vol 20 (8-9) ◽  
pp. 11-17 ◽  
Author(s):  
T. Ito ◽  
T. Okumura ◽  
M. Yamamoto
Keyword(s):  
Drinking Water ◽  
Water Temperature ◽  
Forced Choice ◽  
Residual Chlorine ◽  
Mixing Ratio ◽  
Consumer Panel ◽  
Triangle Method ◽  
Musty Odor ◽  
The Relationship ◽  
Mixed Samples

The study of the relations between the senses of smell and taste and odorant concentration is important for the solution of odor problems. The threshold concentrations of odor and taste (TOC, TTC) of 2-methylisoborneol (MIB) and geosmin were measured by the non-forced choice triangle method using 12-20 panelists. Both TOC and TTC were found to be functions of water temperature and the concentration of residual chlorine. The TOC and TTC of mixed samples were rather lower than the concentrations calculated from the mixing ratio. The sensitivities of the consumer panel and the number of musty odor complaints from consumers are related to MIB or geosmin concentration. The ratio of the number of complaints to MIB (or geosmin) concentration decreased after maximum complaint, but the sensitivity of the consumer panel remained the same.

scholarly journals Lagged recovery of fish spatial distributions following a cold-water perturbation

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
M. D. Robertson ◽  
J. Gao ◽  
P. M. Regular ◽  
M. J. Morgan ◽  
F. Zhang
Keyword(s):  
Water Temperature ◽  
Species Distribution ◽  
Environmental Conditions ◽  
Cold Water ◽  
Heat Waves ◽  
Rapid Change ◽  
Nonlinear Effects ◽  
Spatial Distributions ◽  
Spatiotemporal Model ◽  
Yellowtail Flounder

AbstractAnomalous local temperature and extreme events (e.g. heat-waves) can cause rapid change and gradual recovery of local environmental conditions. However, few studies have tested whether species distribution can recover following returning environmental conditions. Here, we tested for change and recovery of the spatial distributions of two flatfish populations, American plaice (Hippoglossoides platessoides) and yellowtail flounder (Limanda ferruginea), in response to consecutive decreasing and increasing water temperature on the Grand Bank off Newfoundland, Canada from 1985 to 2018. Using a Vector Autoregressive Spatiotemporal model, we found the distributions of both species shifted southwards following a period when anomalous cold water covered the northern sections of the Grand Bank. After accounting for density-dependent effects, we observed that yellowtail flounder re-distributed northwards when water temperature returned and exceeded levels recorded before the cold period, while the spatial distribution of American plaice has not recovered. Our study demonstrates nonlinear effects of an environmental factor on species distribution, implying the possibility of irreversible (or hard-to-reverse) changes of species distribution following a rapid change and gradual recovery of environmental conditions.

Annual variations in body-size spectra of planktonic ciliate communities and their relationships to environmental conditions: a case study in Jiaozhou Bay, northern China

2012 ◽  
Vol 93 (1) ◽  
pp. 47-55 ◽  
Author(s):  
Henglong Xu ◽  
Yong Jiang ◽  
Wei Zhang ◽  
Mingzhuang Zhu ◽  
Khaled A. S. Al-Rasheid ◽  
...  
Keyword(s):  
Body Size ◽  
Water Temperature ◽  
Environmental Conditions ◽  
Jiaozhou Bay ◽  
Northern China ◽  
The Body ◽  
The Yellow Sea ◽  
Size Spectra ◽  
Annual Variations ◽  
Planktonic Ciliate

The annual variations in body-size spectra of planktonic ciliate communities and their relationships to environmental conditions were studied based on a 12-month dataset (June 2007 to May 2008) from Jiaozhou Bay on the Yellow Sea coast of northern China. Based on the dataset, the body sizes of the ciliates, expressed as equivalent spherical diameters, included five ranks: S1 (5–35 μm); S2 (35–55 μm); S3 (55–75 μm); S4 (75–100 μm); and S5 (100–350 μm). These body-size ranks showed a clear temporal succession of dominance in the order of S2 (January–April) → S1 (May–July) → S4 (August–September) → S3 (October–December). Multivariate analyses showed that the temporal variations in their body-size patterns were significantly correlated with changes in environmental conditions, especially water temperature, salinity, dissolved oxygen concentration (DO) and nutrients. In terms of abundance, rank S2 was significantly correlated with water temperature, DO and nutrients, whereas ranks S4 and S5 were correlated with the salinity and nutrients respectively (P < 0.05). These results suggest that the body-size patterns of planktonic ciliate communities showed a clear temporal pattern during an annual cycle and significantly associated with environmental conditions in marine ecosystems.

scholarly journals Effect of the Feed Additive Clinoptilolite (ZeoFeed) on Nutrient Metabolism and Production Performance of Laying Hens

2010 ◽  
Vol 79 (9) ◽  
pp. S29-S34 ◽  
Author(s):  
Miroslav Macháček ◽  
Vladimír Večerek ◽  
Nora Mas ◽  
Pavel Suchý ◽  
Eva Straková ◽  
...  
Keyword(s):  
Drinking Water ◽  
Laying Hens ◽  
Laying Hen ◽  
Production Performance ◽  
Feed Consumption ◽  
Control Group ◽  
Egg Weight ◽  
Indicator Method ◽  
Balance Tests ◽  
Gross Energy

The aim of this study was to assess the effects of two levels of clinoptilolite administered in feed (2% and 4%) on some selected performance indicators, metabolic utilization of basic nutrients and the health status of laying hens. The selected 24 Bovans Goldline hybrid laying hens were divided into three equal groups, two experimental groups (E1 and E2) and one control group (C). The laying hens were housed individually in cages with an automatic supply of drinking water, manual feeding, in a setting with controlled light and temperature regimens. Hens from individual groups were all fed a complete feed mix of the same composition and the only difference was in clinoptilolite supplementation: feed mixes for E1 and E2 groups contained 2% and 4% of clinoptilolite (commercial additive ZeoFeed) respectively, replacing the same amounts of wheat. The hens received feed mixes and drinking water ad libitum. During this 28-day experiment, feed consumption and the number and weight of eggs laid were monitored individually for each hen. At the end of the experiment, the balance test using the indicator method (Cr2O3) was performed in all eight hens in each of the groups. The results of balance tests were then used to calculate the metabolic utilization of selected nutrients (nitrogen, fat, ash, nitrogen-free extracts, starch, gross energy, Ca, P). After the balance tests, blood samples for haematological and biochemical examinations were collected via puncture of the vena basilica. The addition of 2% clinoptilolite to feed mix resulted in a highly significant (P ⪬ 0.01) increase in mean egg weight to 64.69 g, but the addition of 4% clinoptilolite in group E2 resulted in a highly significant (P ⪬ 0.01) decrease in mean egg weight to 62.20 g compared to the control (63.73 g). Moreover, daily feed mix consumption in group E1 decreased to 114 g per one laying hen/day compared to the controls (118 g per one laying hen/day). In group E2 (4% clinoptilolite), daily consumption of feed mix increased compared with the controls to 124 g. The 2% clinoptilolite supplementation of E1 group feed slightly increased metabolic utilization of fat, nitrogen-free extracts, starch and gross energy compared to group C. Results of haematological test of the hens’ blood showed significant changes in haemoglobin, whose values in groups C and E1 were significantly higher (P ⪬ 0.05) than in group E2. Differences in the values of the biochemical indicators monitored (total protein, glucose, cholesterol, triacylglycerols, calcium, phosphorus, magnesium and the AST enzyme) between group C and experimental groups E1 and E2 were not significant and remained within the range of reference values.

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