KING EIDER (SOMATERIA SPECTABILIS) BROOD ECOLOGY: CORRELATES OF DUCKLING SURVIVAL

AbstractEvents during duckling growth can influence waterfowl population dynamics. To gain insight into King Eider (Somateria spectabilis) brood ecology, we monitored 111 and 46 individually marked ducklings from broods of 23 and 11 radiomarked King Eiders during 2000 and 2001, respectively. We used capture-mark-resight data to model apparent survival of King Eider ducklings and broods, and multistratum analysis to estimate probabilities of (1) movement among habitats and (2) apparent survival of ducklings that used various habitats. In addition, we recorded length of stay for 7 and 18 radiomarked females with failed nesting attempts during 2000 and 2001, respectively. Complete loss of individual broods accounted for 84% of all duckling mortality (106 of 126 mortalities), with most brood loss (74%; 17 of 23 broods lost) within the first two days after hatch. Estimated apparent survival of ducklings to 24 days of age was 0.10 (95% CI: 0.05 to 0.15). Apparent survival of broods was estimated to be 0.31 (95% CI: 0.13 to 0.50). Our data suggested an interaction between female size and hatch date, whereby larger females whose ducklings also hatched earlier raised more ducklings than either small females or those with ducklings that hatched later. Overland brood movements ≥1 km occurred in both years, and survival was greatest for ducklings on smaller ponds away from the central nesting area at Karrak Lake, Nunavut. Females that experienced nest failure and total brood loss left the study area earlier than females with surviving ducklings.Écologie d'élevage des couvées de Somateria spectabilis : Corrélations avec la survie des canetons

Download Full-text

Egg Size, Body Size, Locomotion, and Feeding Performance in Captive King Eider Ducklings

The Condor ◽

10.1093/condor/103.1.195 ◽

2001 ◽

Vol 103 (1) ◽

pp. 195-199 ◽

Cited By ~ 9

Author(s):

Vanessa R. Anderson ◽

Ray T. Alisauskas

Keyword(s):

Body Size ◽

Egg Size ◽

Feeding Rate ◽

Canadian Arctic ◽

Feeding Rates ◽

Egg Volume ◽

King Eider ◽

Somateria Spectabilis ◽

Predator Evasion ◽

Better Than

Abstract We studied the effect of egg volume and body size on swimming speed, endurance, and feeding rate in captive King Eider (Somateria spectabilis) ducklings in the Canadian arctic. Sprint speed, endurance, and feeding rate were positively related to egg size and body size. Large ducklings from large eggs performed better than small ducklings from small eggs. Ducklings that are more capable swimmers and have higher feeding rates may grow more quickly and be more effective at predator evasion. Thus, ducklings from large eggs may have a survival advantage over those from small eggs under conditions where predation and nutrition may constrain survival.

Download Full-text

King Eider (Somateria spectabilis)

10.2173/bow.kineid.01 ◽

2020 ◽

Author(s):

Abby N. Powell ◽

Robert S. Suydam

Keyword(s):

King Eider ◽

Somateria Spectabilis

Download Full-text

Numbers and Seasonal Distribution of the Western Population of the King Eider (Somateria spectabilis): Monitoring Organization in the Northern Seas of Russia

Biology Bulletin ◽

10.1134/s1062359021070165 ◽

2021 ◽

Vol 48 (7) ◽

pp. 1041-1050

Author(s):

Yu. V. Krasnov ◽

A. V. Ezhov ◽

K. V. Galaktionov ◽

A. A. Shavykin

Keyword(s):

Seasonal Distribution ◽

King Eider ◽

Western Population ◽

Somateria Spectabilis

Download Full-text

King Eider (Somateria spectabilis) in Michigan Waters

The Auk ◽

10.2307/4073770 ◽

1921 ◽

Vol 38 (3) ◽

pp. 454-455

Keyword(s):

King Eider ◽

Somateria Spectabilis

Download Full-text

King Eider (Somateria spectabilis) in Pennsylvania

The Auk ◽

10.2307/4073891 ◽

1921 ◽

Vol 38 (2) ◽

pp. 270-270

Author(s):

Witmer Stone

Keyword(s):

King Eider ◽

Somateria Spectabilis

Download Full-text

Population Declines of King and Common Eiders of the Beaufort Sea

The Condor ◽

10.1093/condor/102.1.219 ◽

2000 ◽

Vol 102 (1) ◽

pp. 219-222 ◽

Cited By ~ 13

Author(s):

Robert S. Suydam ◽

D. Lynne Dickson ◽

Janey B. Fadely ◽

Lori T. Quakenbush

Keyword(s):

North America ◽

Beaufort Sea ◽

Common Eider ◽

Western North America ◽

Population Declines ◽

King Eider ◽

Somateria Spectabilis ◽

Common Eiders ◽

The Common ◽

Northern Alaska

Abstract King (Somateria spectabilis) and Common Eiders (S. mollissima v-nigra) wintering off western North America migrate past Point Barrow, Alaska and across the Beaufort Sea to nest in northern Alaska and northwestern Canada. Migration counts were conducted by various researchers at Point Barrow during 1953, 1970, 1976, 1987, 1994, and 1996. We examined population trends by standardizing the analysis of the migration counts in all years. Based on this standardized procedure, the King Eider population appeared to remain stable between 1953 and 1976 but declined by 56% (or 3.9% year−1) from approximately 802,556 birds in 1976 to about 350,835 in 1996. The Common Eider population declined by 53% (or 3.6% year−1) from approximately 156,081 birds in 1976 to about 72,606 in 1996. Reasons for the declines are unknown.

Download Full-text