scholarly journals Influence of Environmental Stress and Anthropogenic Disturbance on the Energy Expenditure of Wintering Northern Pintails (Anas acuta)

Waterbirds ◽  
2019 ◽  
Vol 42 (3) ◽  
pp. 294
Author(s):  
Dustin P. Taylor ◽  
Daniel A. Dvorett ◽  
John N. Vradenburg ◽  
Loren M. Smith
Keyword(s):  
Energy Expenditure ◽  
Environmental Stress ◽  
Anthropogenic Disturbance ◽  
Anas Acuta ◽  
Northern Pintails

scholarly journals Small actions, big costs: the behavioural energetics of a commercially important invertebrate

2012 ◽  
Vol 9 (72) ◽  
pp. 1486-1498 ◽  
Author(s):  
Anthony A. Robson ◽  
Laurent Chauvaud ◽  
Rory P. Wilson ◽  
Lewis G. Halsey
Keyword(s):  
Energy Expenditure ◽  
Metabolic Rate ◽  
Anthropogenic Disturbance ◽  
Daily Energy Expenditure ◽  
Time Budgets ◽  
Daily Energy ◽  
In The Wild ◽  
Overall Dynamic Body Acceleration ◽  
Farming Industry ◽  
Feeding Behaviours

Anthropogenic disturbance of farmed animals can be detrimental by adversely affecting behaviours and metabolic rate, potentially reducing their commercial value. However, relatively little is known about the normal behavioural time budgets and associated metabolism of many such species, particularly for example pectinid bivalves, which use anaerobic metabolism during periods of short-burst activity. In the present study, we used the accelerometry technique to measure scallop overall dynamic body acceleration in combination with respirometry in order to obtain and compare the behavioural time budgets and associated metabolism of 10 scallops, Pecten maximus , in an aquaculture hatchery and 10 in the wild. Scallops in the wild typically spent only 0.1 per cent of the time moving (less than 2 min d −1 ), yet, on average, the estimated metabolism of such movement represented 16.8 per cent of daily energy expenditure. Furthermore, owing to their reliance on anaerobic pathways during such activity, movement resulted in the wild scallops having a raised metabolic rate for, on average, an estimated 7.8 per cent of the time, during which oxygen debts accumulated during movement were paid off. Hatchery scallops also typically spent only 0.1 per cent of the time moving but estimated metabolism of such movement represented 41.8 per cent of daily energy expenditure. Estimated mean daily metabolism of scallops in the hatchery was significantly higher than scallops in the wild (169.1 versus 120.7 mg O 2 d −1 ) because anthropogenic disturbance in the hatchery caused energetically costly non-feeding behaviours. Consequently, hatchery scallops also spent a far greater amount of time with a raised metabolic rate (an estimated 26.6% of the time) than wild scallops. While short-term bursts of movement in pectinid bivalves may appear innocuous, they result in large expenditures of energy and an oxygen debt that is paid off over long periods of time that together limit further movement. These findings have implications for the farming industry; mitigating anthropogenic disturbances to farmed colonies may minimize non-feeding behaviours and hence maximize growth rates by reducing the costs of such movements and increasing the opportunity to feed.

scholarly journals ESTIMATION OF CARCASS FAT AND PROTEIN IN NORTHERN PINTAILS (ANAS ACUTA) DURING SPRING MIGRATION

2003 ◽  
Vol 39 (3) ◽  
pp. 620-626 ◽  
Author(s):  
Pascale Dombrowski ◽  
Jean-Claude Bourgeois ◽  
Richard Couture ◽  
Christian Linard
Keyword(s):  
Spring Migration ◽  
Anas Acuta ◽  
Northern Pintails

scholarly journals Do Female Northern Pintails, Anas acuta, Initiate Rapid Follicular Growth During Spring Migration?

2003 ◽  
Vol 117 (4) ◽  
pp. 605
Author(s):  
Pascale Dombrowski ◽  
Jean-Claude Bourgeois ◽  
Richard Couture ◽  
Christian Linard
Keyword(s):  
Bone Mass ◽  
Follicular Development ◽  
Formation Processes ◽  
Follicular Growth ◽  
Total Blood ◽  
Anas Acuta ◽  
Blood Calcium ◽  
Egg Formation ◽  
Northern Pintails ◽  
St Lawrence River

We describe the reproductive status of female Northern Pintails (Anas acuta) staging on a flooded plain along the St. Lawrence River (Quebec, Canada) during the spring of 1997. Nine of the 27 female pintails we collected had ovarian follicles showing Rapid Follicular Growth (RFG). In RFG females, total blood calcium and ash mass increased with follicular development. They had greater muscle and bone mass, and higher blood calcium levels, compared to pre-RFG birds. However, carcass fat mass and sex hormone levels (estradiol and progesterone) did not differ between the two groups. Our results indicate that at least some Northern Pintails initiate egg formation processes prior to arrival at nesting areas, which is consistent with early nesting. The nutrients and energy required for this early egg formation must come from reserves stored during winter, foods consumed in staging areas, or both.

Body reserves of neonate northern pintails (Anas acuta)

1988 ◽  
Vol 66 (4) ◽  
pp. 811-816 ◽  
Author(s):  
David C. Duncan
Keyword(s):  
Body Composition ◽  
Total Lipid ◽  
Lipid Content ◽  
The Body ◽  
Anas Acuta ◽  
High Lipid Content ◽  
Fat Deposits ◽  
High Lipid ◽  
Northern Pintails ◽  
Starvation Conditions

Neonate northern pintails (Anas acuta) had a high lipid content primarily attributable to the fat deposits in their carcasses. Their yolk sacs contained 24% of the total lipid at hatching. In the absence of food, newly hatched northern pintails survived by catabolizing their carcass fats. The yolk sac was not an important source of endogenous nutriment under starvation conditions but appeared to be important to the growth of ducklings, contributing materials for the synthesis of nonfat tissue. The function of yolk sacs is reviewed and the body composition of neonate northern pintails is compared with that of other species in relation to the developmental maturity of the young.

scholarly journals Energy expenditure in preterm infants during periods of environmental stress in the neonatal intensive care unit

2013 ◽  
Vol 11 (4) ◽  
pp. 241-247 ◽  
Author(s):  
Niang-Huei Peng ◽  
Jean Bachman ◽  
Chau-Huei Chen ◽  
Li-Chi Huang ◽  
Hong-Chin Lin ◽  
...  
Keyword(s):  
Intensive Care Unit ◽  
Intensive Care ◽  
Energy Expenditure ◽  
Neonatal Intensive Care Unit ◽  
Environmental Stress ◽  
Preterm Infants ◽  
Neonatal Intensive Care

Shot Ingestion by Wintering Female Northern Pintails (Anas acuta) in the Texas Coastal Plain, 2012–14

2016 ◽  
Vol 52 (1) ◽  
pp. 118-121 ◽  
Author(s):  
Nathaniel R. Huck ◽  
Bart M. Ballard ◽  
Alan M. Fedynich ◽  
Kevin J. Kraai ◽  
Mauro E. Castro
Keyword(s):  
Coastal Plain ◽  
Anas Acuta ◽  
Northern Pintails

Variation in spring migration routes and breeding distribution of northern pintails Anas acuta that winter in Japan

2011 ◽  
Vol 42 (4) ◽  
pp. 289-300 ◽  
Author(s):  
Jerry W. Hupp ◽  
Noriyuki Yamaguchi ◽  
Paul L. Flint ◽  
John M. Pearce ◽  
Ken-ichi Tokita ◽  
...  
Keyword(s):  
Spring Migration ◽  
Migration Routes ◽  
Anas Acuta ◽  
Breeding Distribution ◽  
Northern Pintails

scholarly journals Does Increasing Daylength Control Seasonal Changes in Clutch Sizes of Northern Pintails (Anas Acuta)?

The Auk ◽  
2002 ◽  
Vol 119 (2) ◽  
pp. 498-506 ◽  
Author(s):  
Gary L. Krapu ◽  
Glen A. Sargeant ◽  
Alison E. H. Perkins
Keyword(s):  
North Dakota ◽  
Survival Rates ◽  
Day Length ◽  
Population Declines ◽  
Anas Acuta ◽  
Breeding Grounds ◽  
Northern Pintails ◽  
Rate Of Decline ◽  
Seasonal Decline ◽  
Nesting Season

AbstractWe evaluated spatiotemporal variation in clutch sizes of Northern Pintails (pintails; Anas acuta) nesting in California (1985 to 1996), North Dakota (1982 to 1985), Saskatchewan (1982 to 1985) and Alaska (1991 to 1993) to determine whether seasonal declines in clutch size varied in ways that were consistent with a controlling influence of increasing day length. Pintails began nesting in mid-March in California, mid-April in North Dakota and Saskatchewan, and mid-May in Alaska. Observed durations of nesting were 70 ± 2.6 days (SE) in California, 60 ± 6.3 days in North Dakota, 66 ± 1.3 days in Saskatchewan, and 42 ± 0.7 days in Alaska. Annual differences were the principal source of variation in mean clutch sizes (σ̂Y2 = 0.15, SE = 0.049), which varied little among study locations (σ̂A2 = 0.002, SE = 0.013). Predicted rates of seasonal decline in clutch sizes increased with latitude early in the nesting season, but declined as the nesting season progressed, except in California. Rates of decline in clutch sizes thus were not directly related to rates of increase in day length. Predicted declines in numbers of eggs per clutch over the nesting season were similar for all four locations (range, 3.05–3.12) despite wide variation in durations of nesting. Evidence suggests that reduced nutrient availability during nesting contributes to a higher rate of decline in clutch sizes in Alaska than in temperate regions. Pintails that nest early lay large initial clutches, but thereafter clutch sizes decline rapidly and breeding terminates early. This reproductive strategy is adaptive because young that hatch earliest exhibit the highest survival rates; however, the conversion of grassland to cropland on the primary prairie breeding grounds has reduced hatching rates of clutches laid early in the nesting season. Under these conditions, the limited capacity to renest in late spring on their prairie breeding grounds probably has contributed to Pintail population declines.

Contrast Radiography With Positive-Pressure Insufflation in Northern Pintails (Anas acuta)

2001 ◽  
Vol 15 (3) ◽  
pp. 178-186 ◽  
Author(s):  
Johanna Sherrill ◽  
Lisa H. Ware ◽  
Warren E. Lynch ◽  
Richard J. Montali ◽  
Mitchell Bush
Keyword(s):  
Positive Pressure ◽  
Anas Acuta ◽  
Contrast Radiography ◽  
Northern Pintails
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