Primary Molt and Body Mass Changes in Least (Calidris minutilla) and Western (Calidris mauri) Sandpipers: Patterns from Ensenada de La Paz, México

Waterbirds ◽  
2013 ◽  
Vol 36 (3) ◽  
pp. 253-262 ◽  
Author(s):  
Daniel Galindo-Espinosa ◽  
Ken G. Rogers ◽  
Guillermo Fernández
Keyword(s):  
Body Mass ◽  
La Paz ◽  
Calidris Mauri ◽  
Body Mass Changes

Must Desert Chukars (Alectoris chukar sinaica) Drink Water? Water Influx and Body Mass Changes in Response to Dietary Water Content

The Auk ◽  
1984 ◽  
Vol 101 (1) ◽  
pp. 47-52 ◽  
Author(s):  
A. Allan Degen ◽  
Berry Pinshow ◽  
Peter J. Shaw
Keyword(s):  
Drinking Water ◽  
Body Mass ◽  
Free Water ◽  
Energy Requirements ◽  
Fresh Matter ◽  
Alectoris Chukar ◽  
Water Influx ◽  
Green Vegetation ◽  
Body Mass Changes ◽  
Vegetation Water

Abstract The Chukar subspecies Alectoris chukar sinaica inhabits the Negev desert, which is characterized by hot, dry summers, and little winter rainfall. Vegetation is dry and dormant during the summer and autumn; green, succulent vegetation is available following winter rain. We studied whether or not and under what dietary conditions Chukars require drinking water. Four groups of Chukars in an outdoor aviary received either a dry ration + water, a dry ration + green vegetation, a dry ration + green vegetation + water, or green vegetation only. The birds offered only greens lost 15% of their body mass in the first 8 days and 2.9% over the next 6 days, while birds on the other three treatments maintained body mass. The birds receiving only greens had the highest total body water to body mass ratio and the highest water influx. We concluded that the Chukars receiving only green vegetation met their water requirements but not their maintenance energy requirements. Chukars fulfilled both their water and energy requirements on a dry ration + green vegetation (without drinking water); the green vegetation comprised approximately 60% of their total fresh matter intake, or 26% of their total dry matter intake. Our analysis suggests that wild desert Chukars do not require drinking water from early winter to late spring, when succulent forage is available, but probably need free water during summer and autumn, when the bulk of their diet is seeds.

Survivors of acute lymphoblastic leukemia and body mass changes

2009 ◽  
Vol 9 (1) ◽  
pp. 65-77 ◽  
Author(s):  
Szymon Skoczen ◽  
Marcin Surmiak ◽  
Wojciech Strojny
Keyword(s):  
Acute Lymphoblastic Leukemia ◽  
Body Mass ◽  
Lymphoblastic Leukemia ◽  
Body Mass Changes

Body mass changes in male Daubenton's bats Myotis daubentonii (Chiroptera, Vespertilionidae) during the seasonal activity period

Mammalia ◽  
2004 ◽  
Vol 68 (4) ◽  
Author(s):  
Jorge A. Encarnação ◽  
Markus Dietz ◽  
Uwe Kierdorf ◽  
Volkmar Wolters
Keyword(s):  
Body Mass ◽  
Statistical Significance ◽  
Reproductive Activity ◽  
Activity Period ◽  
Adult Males ◽  
Body Mass Changes ◽  
Myotis Daubentonii ◽  
The Difference ◽  
Juvenile Males ◽  
Wallis Anova

Body mass changes of adult and juvenile male Daubenton’s bats were studied in a summer habitat in Hesse (Germany) in the years 1998-2001. Animals from the resident population were regularly captured along the flight path from April to October, and body mass was determined using a digital balance. Body mass of adult individuals differed significantly among fortnightly periods (Kruskal-Wallis ANOVA by ranks: H = 141.75, p < 0.001). Body mass increased significantly from the second half of April (median: 7.0 g) to the first half of May (median: 7.8 g). Between the second half of May and the first half of August, median body mass fluctuated between 7.8 g and 8.3 g. From the second half of July (median: 7.9 g) to the second half of August (median: 8.4 g), and the second half of September (median: 9.3 g) body mass again significantly increased. The highest median body mass (9.6 g) was recorded in the second half of October. Median body mass of juvenile males ranged between 6.5 g in the first half of July and 8.5 g in the second half of October. Differences in body mass over the studied period were significant (H = 21.70, p < 0.01). During the months July, August, and September, body mass of adult males was significantly higher than that of juveniles, whereas in October the difference was no longer of statistical significance. It is suggested that the decrease in body mass observed in some adult males in September was related to their reproductive activity.

scholarly journals Body-mass Changes in Female Collared Flycatchers: State-dependent Strategy

The Auk ◽  
2001 ◽  
Vol 118 (2) ◽  
pp. 550-552 ◽  
Author(s):  
Mariusz Cichoń
Keyword(s):  
Mass Loss ◽  
Body Mass ◽  
Weather Conditions ◽  
Adaptive Strategy ◽  
Ficedula Albicollis ◽  
Prolonged Incubation ◽  
Collared Flycatcher ◽  
State Dependent ◽  
Adverse Weather ◽  
Body Mass Changes

Abstract Collared Flycatcher (Ficedula albicollis) females experimentally were forced to prolong their incubation to address the question whether mass constancy during incubation and subsequent mass loss after hatching is actually related to breeding stage. Compared to unmanipulated control females a week after expected hatching, experimental females did not show any significant mass loss during prolonged incubation, whereas control females that successfully hatched their eggs dropped their mass significantly. Results show that body mass in females is associated with the reproductive stage and may reflect an adaptive strategy. High and stable incubation mass can be a fasting endurance in case of adverse weather conditions when females stay on the nest instead of foraging.

BODY MASS CHANGES AND VOLUNTARY FLUID INTAKES OF ELITE LEVEL WATER POLO PLAYERS AND SWIMMERS

1999 ◽  
Vol 31 (Supplement) ◽  
pp. S260
Author(s):  
G. R. Cox ◽  
L. M. Burke ◽  
E. M. Broad ◽  
M. Riley
Keyword(s):  
Body Mass ◽  
Water Polo ◽  
Elite Level ◽  
Body Mass Changes

Seasonal changes in body mass and body composition of ringed seals (Phoca hispida) on Svalbard

1990 ◽  
Vol 68 (3) ◽  
pp. 470-475 ◽  
Author(s):  
Morten Ryg ◽  
Thomas G. Smith ◽  
Nils Are Øritsland
Keyword(s):  
Body Composition ◽  
Body Mass ◽  
Seasonal Changes ◽  
Adult Males ◽  
Phoca Hispida ◽  
Core Mass ◽  
Adult Females ◽  
Ringed Seals ◽  
Body Fat Content ◽  
Body Mass Changes

Seasonal changes in body mass and body composition of ringed seals (Phoca hispida) from the Svalbard Islands are described. The blubber content of adult females decreased from a high of about 50% at the beginning of the pupping season in March–April to a low of 31% during moulting in June. In adult males, the blubber content decreased from 41% in March to 29% in June. By estimating an individual seal's body mass by 1 April from its standard body length, we calculated an average daily loss of body mass of 160 g/day in adult females and 100 g/day in adult males from the start of lactation to the middle of moulting. The blubber content of sexually immature seals was less in June and July than in April, but the seasonal changes were smaller than in adult seals. We found no evidence of significant changes in core mass in adult seals, and suggest that the seasonal body mass changes are mostly due to changes in body fat content.

Poster #T68 BRAIN SYSTEMS REGULATING FOOD-INTAKE AND BODY MASS CHANGES DURING ACUTE ANTIPSYCHOTIC TREATMENT IN FIRST-EPISODE SCHIZOPHRENIA

2014 ◽  
Vol 153 ◽  
pp. S312
Author(s):  
Robin Emsley ◽  
Laila Asmal ◽  
Bonginkosi Ciliza ◽  
Stefan du Plessis ◽  
Jonathan Carr ◽  
...  
Keyword(s):  
Food Intake ◽  
Body Mass ◽  
First Episode ◽  
Antipsychotic Treatment ◽  
Body Mass Changes ◽  
First Episode Schizophrenia
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