scholarly journals What limits clutch size? A test of the incubation‐capacity hypothesis in a high‐elevation population of Mountain Bluebirds

2019 ◽  
Vol 90 (2) ◽  
pp. 154-161
Author(s):  
L. Scott Johnson ◽  
Mariah C. Maxwell ◽  
Samantha D. Nash
Keyword(s):  
Clutch Size ◽  
High Elevation ◽  
Mountain Bluebirds

scholarly journals Changes in Egg Size and Clutch Size with Elevation in a Wyoming Population of Mountain Bluebirds

The Condor ◽  
2006 ◽  
Vol 108 (3) ◽  
pp. 591-600 ◽  
Author(s):  
L. Scott Johnson ◽  
Emilene Ostlind ◽  
Jessica L. Brubaker ◽  
Susan L. Balenger ◽  
Bonnie G. P. Johnson ◽  
...  
Keyword(s):  
Clutch Size ◽  
Egg Size ◽  
Life History Traits ◽  
High Elevation ◽  
High Elevation Site ◽  
Female Condition ◽  
Lower Elevation ◽  
Sialia Currucoides ◽  
Mountain Bluebirds ◽  
High Elevations

Abstract Few studies have examined how avian life-history traits vary within populations as elevation increases and climate becomes more severe. We compared egg and clutch sizes of Mountain Bluebirds (Sialia currucoides) nesting at two elevations (1500 m and 2500 m above sea level) in the Bighorn Mountains of Wyoming over two years. Eggs laid by females at the high-elevation site were, on average, significantly (6%) smaller in volume than eggs laid by their lower-elevation counterparts. Across elevations, egg size showed a significant positive correlation with female body condition (weight relative to size), and high-elevation females had significantly lower indices of condition than low-elevation females. Temperatures during clutch formation were colder at the high-elevation site, and egg size was negatively related to temperature after controlling for the effects of female condition. Clutches of females at high elevations were, on average, marginally smaller (by 5%, 0.3 eggs) than clutches of low-elevation females. Unlike egg size, clutch size was unrelated to either female condition or temperature during clutch formation. This suggests that, when under energetic or nutritional stress at high elevations, females sacrifice egg size before sacrificing clutch size.

A comparison of reproductive output of the Omei Treefrog (Rhacophorus omeimontis) between high and low elevations

2011 ◽  
Vol 61 (3) ◽  
pp. 263-276 ◽  
Author(s):  
Wen Bo Liao ◽  
Xin Lu
Keyword(s):  
Body Size ◽  
Clutch Size ◽  
Egg Size ◽  
Reproductive Output ◽  
Food Resource ◽  
High Elevation ◽  
Cold Climate ◽  
Western China ◽  
Major Influence ◽  
Rhacophorus Omeimontis

AbstractElevation that results in changes in climate, duration of breeding season and food resource has long been considered a major influence on the evolution of life-history traits in amphibians. The present study examined differences in reproductive output (clutch size and egg size) of the Omei Treefrog (Rhacophorus omeimontis) at two elevations (1000 m and 1700 m above sea level) in Baoxing County, western China. Within each population, female attributes (size and age) were responsible for much of the reproductive output variation in that larger or older females produced larger clutches of smaller eggs. Clutch size and egg size showed a significantly negative correlation, which was indicative of a trade-off between the two parameters. The high-elevation females were significantly larger than the low-elevation counterparts. After accounting for interpopulational difference in body size, clutch size, egg size and clutch volume differed significantly between the populations. For the high-elevation population relatively smaller clutches tended to be associated with larger eggs. Our findings suggest that females produce smaller clutches relative to body size and larger eggs in the high-elevation population to ensure that each egg is adequately provisioned in the face of cold climate and short duration of development.

CHANGES IN EGG SIZE AND CLUTCH SIZE WITH ELEVATION IN A WYOMING POPULATION OF MOUNTAIN BLUEBIRDS

The Condor ◽  
2006 ◽  
Vol 108 (3) ◽  
pp. 591 ◽  
Author(s):  
L. Scott Johnson ◽  
Emilene Ostlind ◽  
Jessica L. Brubaker ◽  
Susan L. Balenger ◽  
Bonnie G.P. Johnson ◽  
...  
Keyword(s):  
Clutch Size ◽  
Egg Size ◽  
Mountain Bluebirds

scholarly journals Clutch Size of a High-elevation Lizard, the Montane Toad-headed Agama (Phrynocephalus theobaldi Blyth 1863) from the Trans-Himalayas

2020 ◽  
Vol 27 (2) ◽  
pp. 281-283
Author(s):  
Dimpi A. Patel ◽  
Pankaj Raina ◽  
Sunetro Ghoshal ◽  
Animesh Talukdar
Keyword(s):  
Clutch Size ◽  
High Elevation

Local weather and regional climate influence breeding dynamics of Mountain Bluebirds (Sialia currucoides) and Tree Swallows (Tachycineta bicolor): a 35-year study

2017 ◽  
Vol 95 (4) ◽  
pp. 271-277 ◽  
Author(s):  
S.L. McArthur ◽  
A.E. McKellar ◽  
N.J. Flood ◽  
M.W. Reudink
Keyword(s):  
Citizen Science ◽  
Clutch Size ◽  
Regional Climate ◽  
Tachycineta Bicolor ◽  
Tree Swallow ◽  
Tree Swallows ◽  
Science Data ◽  
Sialia Currucoides ◽  
Mountain Bluebirds ◽  
Local Weather

Many songbirds are under increasing pressure owing to habitat loss, land-use changes, and rapidly changing climatic conditions. Using citizen science data collected from 1980 to 2014, we asked how local weather and regional climate influenced the breeding dynamics of Mountain Bluebirds (Sialia currucoides (Bechstein, 1798)) and Tree Swallows (Tachycineta bicolor (Vieillot, 1808)). Mountain Bluebird reproduction was strongly associated with local weather: number of nestlings and fledglings both decreased in years of high rainfall. Clutch size and number of fledglings also declined over the study period. Abundance of Mountain Bluebirds was higher in years of lower early-season snowfall and warmer local temperatures, as well as more negative Southern Oscillation Index (SOI) values, indicating a positive influence of El Niño conditions. Tree Swallow reproduction (clutch size, number of nestlings, and number of fledglings) was negatively associated with SOI values, and the number of Tree Swallow nestlings decreased in years of higher rainfall and warmer temperatures. Tree Swallows also showed a marked decline in abundance over the period of the study, consistent with recent range-wide declines. Together, our results demonstrate that local weather and regional climate differentially affect the reproductive dynamics of Mountain Bluebirds and Tree Swallows and highlight the importance of long-term citizen science data sets.

scholarly journals Breeding biology in a population of Rufous-collared Sparrow (Zonotrichia capensis, Statius Müller, 1776) at different elevations in the Tropical Andes

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Leydy J. Cardona-Salazar ◽  
Ana Busi ◽  
Daniela Gómez Castillo ◽  
Paula A. Ossa-López ◽  
Fredy A. Rivera-Páez ◽  
...  
Keyword(s):  
Life History ◽  
Environmental Factors ◽  
Clutch Size ◽  
Life History Traits ◽  
Reproductive Activity ◽  
High Elevation ◽  
Breeding Biology ◽  
Egg Volume ◽  
Tropical Andes ◽  
Zonotrichia Capensis

Abstract: Breeding biology in a population of Rufous-collared Sparrow (Zonotrichia capensis, Statius Müller, 1776) at different elevations in the Tropical Andes. Elevation strongly influences the evolution of life history traits associated with bird physiology and reproduction. Since life history traits in birds are modulated by environmental factors that vary with elevation, we expected to find changes in breeding biology traits of Z. capensis at different elevations. In this study, we compared the breeding biology (clutch size, egg volume, and reproductive activity) of a non-migratory population of Z. capensis in two localities at different elevations (low and high elevations, 1 800 m a.s.l., and 3 800 m a.s.l., respectively) and same latitude in the Colombian Tropical Andes for a one-year period. We found no differences in clutch size between the localities; however, egg volume was higher at high elevation. Furthermore, the reproductive activity differed significantly between localities. We propose that clutch size is likely conserved throughout the altitudinal distribution of Z. capensis since the species evolved in Tropical lowlands. On the other hand, the larger egg volume at high elevation could obey local environmental factors that may favor the reproductive success of the population.

scholarly journals Aspidoscelis costatus costatus (Squamata, Teiidae): high elevation clutch production for a population of whiptail lizards

Herpetozoa ◽  
2020 ◽  
Vol 33 ◽  
pp. 131-137
Author(s):  
Gisela Granados-González ◽  
Carlos Pérez-Almazán ◽  
Aldo Gómez-Benitez ◽  
James Martin Walker ◽  
Oswaldo Hernández-Gallegos
Keyword(s):  
Clutch Size ◽  
Life History Traits ◽  
Ecological Factors ◽  
High Elevation ◽  
Reproductive Condition ◽  
Drift Fence ◽  
Abdominal Palpation ◽  
Large Clutch ◽  
The Mean ◽  
Whiptail Lizards

Clutch size and number of clutches per reproductive cycle are important life history traits that can be influenced by anatomical, physiological, evolutionary, and ecological factors. This report on the clutch size and number of clutches of an endemic Mexican whiptail lizard, Aspidoscelis costatus costatus (Cope, 1878), is based on a study of population at an unusually high elevation for a member of this genus. The study site is located in Ixtapan de la Sal, southeastern Estado de México, Central Mexico, at 2090 m a.s.l. Lizards were sampled in June 2006, and from May to July 2007, where females of Aspidoscelis costatus costatus were collected by hand along a drift fence. Female reproductive condition was evaluated based on abdominal palpation for presence of developing eggs; clutch size was determined by actual counts of either vitellogenic follicles or oviductal eggs. The smallest reproductive female was 77 mm snout-vent length; females produced a minimum of two clutches during the breeding season, the mean clutch size of 6.5 eggs (n = 33) was one of the largest reported for the genus. However, both length and width of its eggs, and the relative clutch mass have not been diminished by development of a large clutch. Additionally, comparisons of clutch size were undertaken within the polytypic A. costatus complex, within the genus Aspidoscelis, and between certain genera of whiptail lizards. This apparently represents the first study of whiptail lizards (genus Aspidoscelis), assessing the aforementioned reproductive characteristics, in a population above 2000 m.

Current distribution of Nilgiri grass yellow Eurema nilgiriensis Yata (Lepidoptera: Pieridae), with an updated taxonomic key to Eurema of Western Ghats, India

ENTOMON ◽  
2019 ◽  
Vol 44 (1) ◽  
pp. 23-32 ◽  
Author(s):  
P. C. Sujitha ◽  
G. Prasad ◽  
R. Nitin ◽  
Dipendra Nath Basu ◽  
Krushnamegh Kunte ◽  
...  
Keyword(s):  
Current Distribution ◽  
Western Ghats ◽  
Original Description ◽  
High Elevation ◽  
Type Locality ◽  
Ecological Data ◽  
Field Identification ◽  
Wing Patterns ◽  
Southern Western Ghats ◽  
The Nilgiris

Eurema nilgiriensis Yata, 1990, the Nilgiri grass yellow, was described from Nilgiris in southern India. There are not many published records of this species since its original description, and it was presumed to be a high-elevation endemic species restricted to its type locality. Based on the external morphology (wing patterns) as well as the male genitalia, the first confirmed records of the species from Agasthyamalais and Kodagu in the southern Western Ghats, is provided here. This report is a significant range extension for the species outside the Nilgiris, its type locality. Ecological data pertaining to this species as well as the field identification key to all known Eurema of Western Ghats are also presented.

Assemblage Patterns of Hymenoptera at Different Elevations of Gunung Datuk, Rembau

2017 ◽  
Vol 14 (2) ◽  
pp. 1 ◽  
Author(s):  
Noor Nasuha Abd Aziz ◽  
Siti Khairiyah Mohd Hatta ◽  
Idris Abd Ghani ◽  
Saiyid Jalaluddin Saiyid Shaifuddin
Keyword(s):  
Species Richness ◽  
Diversity Index ◽  
High Elevation ◽  
Significant Difference ◽  
Index Site ◽  
Evenness Index ◽  
Abundance And Diversity ◽  
Richness Index ◽  
Paired T Test ◽  
Malaise Traps

A study on abundance and diversity of Hymenoptera was conducted in Gunung Datuk, Rembau. Samplings were conducted from November 2014 to February 2015 using six Malaise traps. Three traps were placed at Site 1 at 700m height for high elevation and the remaining traps were placed at Site 2 at 200m height for low elevation. A total number of 221 Hymenopteran were collected which consist of nine families namely Ichneumonidae, Formicidae, Braconidae, Bethylidae, Evaniidae, Tiphiidae, Vespidae, Pompilidae and Apidae. In this study, 93 individuals were obtained from Site 1, comprising nine families and 43 morphospecies while 127 individuals were obtained from Site 2 with nine families and 45 morphospecies. Formicidae was the most dominant family collected from both sites with a total of 104 individuals while the least family recorded was Apidae with only one individual. Shannon’s Weiner Diversity Index (H’) showed Site 1 had the higher diversity value with H’ = 3.17 compared to Site 2 with value H’ = 3.12. For Evenness Index, Site 1 had higher value compared to Site 2 with E’ = 0.84 and E’ = 0.82 respectively. Moreover, for Margalef Richness Index, Site 1 recorded R’ = 9.24 while site two recorded R’ = 9.08 which concluded that Site 1 had higher species richness compared to Site 2. Paired t-test showed that both sites had no significant difference with p>0.05. Overall study showed that the diversity and abundance of Hymenoptera in Gunung Datuk were low since the value of H’ is less than 3.50.

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