scholarly journals Leucocyte profiles of Arctic marine birds: correlates of migration and breeding phenology

2015 ◽  
Vol 3 (1) ◽  
pp. cov028 ◽  
Author(s):  
Mark L. Mallory ◽  
Catherine M. Little ◽  
Ellen S. Boyd ◽  
Jennifer Ballard ◽  
Kyle H. Elliott ◽  
...  
Keyword(s):  
Breeding Phenology ◽  
Marine Birds ◽  
Leucocyte Profiles

Variation in ice conditions has strong effects on the breeding of marine birds at Prince Leopold Island, Nunavut

Ecography ◽  
2005 ◽  
Vol 28 (3) ◽  
pp. 331-344 ◽  
Author(s):  
Anthony J. Gaston ◽  
H. Grant Gilchrist ◽  
Mark L. Mallory
Keyword(s):  
Marine Birds ◽  
Ice Conditions

European breeding phenology of the invasive common waxbill, a sub-Saharan opportunistic breeder

2021 ◽  
Author(s):  
Patrícia Beltrão ◽  
Ana Cristina R. Gomes ◽  
Cristiana I. Marques ◽  
Soraia Guerra ◽  
Helena R. Batalha ◽  
...  
Keyword(s):  
Breeding Phenology ◽  
Sub Saharan ◽  
Common Waxbill

scholarly journals Temporal changes in reproductive success and optimal breeding decisions in a long-distance migratory bird

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Cynthia Reséndiz-Infante ◽  
Gilles Gauthier
Keyword(s):  
Reproductive Success ◽  
Clutch Size ◽  
Environmental Changes ◽  
Migratory Bird ◽  
Laying Date ◽  
Negative Consequences ◽  
Breeding Phenology ◽  
Additional Time ◽  
Long Distance ◽  
Seasonal Decline

AbstractMany avian migrants have not adjusted breeding phenology to climate warming resulting in negative consequences for their offspring. We studied seasonal changes in reproductive success of the greater snow goose (Anser caerulescens atlantica), a long-distance migrant. As the climate warms and plant phenology advances, the mismatch between the timing of gosling hatch and peak nutritive quality of plants will increase. We predicted that optimal laying date yielding highest reproductive success occurred earlier over time and that the seasonal decline in reproductive success increased. Over 25 years, reproductive success of early breeders increased by 42%, producing a steeper seasonal decline in reproductive success. The difference between the laying date producing highest reproductive success and the median laying date of the population increased, which suggests an increase in the selection pressure for that trait. Observed clutch size was lower than clutch size yielding the highest reproductive success for most laying dates. However, at the individual level, clutch size could still be optimal if the additional time required to acquire nutrients to lay extra eggs is compensated by a reduction in reproductive success due to a delayed laying date. Nonetheless, breeding phenology may not respond sufficiently to meet future environmental changes induced by warming temperatures.

scholarly journals Preparing for translocations of a Critically Endangered petrel through targeted monitoring of nest survival and breeding biology

Oryx ◽  
2021 ◽  
pp. 1-9
Author(s):  
Johannes H. Fischer ◽  
Heiko U. Wittmer ◽  
Graeme A. Taylor ◽  
Igor Debski ◽  
Doug P. Armstrong
Keyword(s):  
Southern Oscillation ◽  
Nest Survival ◽  
Growth Curves ◽  
Breeding Biology ◽  
Source Population ◽  
Breeding Phenology ◽  
Chick Survival ◽  
Egg Survival ◽  
Dune System ◽  
Burrow Density

Abstract The population of the recently-described Whenua Hou diving petrel Pelecanoides whenuahouensis comprises c. 200 adults that all breed in a single 0.018 km2 colony in a dune system vulnerable to erosion. The species would therefore benefit from the establishment of a second breeding population through a translocation. However, given the small size of the source population, it is essential that translocations are informed by carefully targeted monitoring data. We therefore modelled nest survival at the remaining population in relation to potential drivers (distance to sea and burrow density of conspecifics and a competitor) across three breeding seasons with varying climatic conditions as a result of the southern oscillation cycle. We also documented breeding phenology and burrow attendance, and measured chicks, to generate growth curves. We estimated egg survival at 0.686, chick survival at 0.890, overall nest survival at 0.612, and found no indication that nest survival was affected by distance to sea or burrow density. Whenua Hou diving petrels laid eggs in mid October, eggs hatched in late November, and chicks fledged in mid January at c. 86% of adult weight. Burrow attendance (i.e. feeds) decreased from 0.94 to 0.65 visits per night as chicks approached fledging. Nest survival and breeding biology were largely consistent among years despite variation in climate. Nest survival estimates will facilitate predictions about future population trends and suitability of prospective translocation sites. Knowledge of breeding phenology will inform the timing of collection of live chicks for translocation, and patterns of burrow attendance combined with growth curves will structure hand-rearing protocols. A tuhinga whakarāpopoto (te reo Māori abstract) can be found in the Supplementary material.

Breeding Phenology and Clutch Size in the Marbled Murrelet

The Auk ◽  
1974 ◽  
Vol 91 (1) ◽  
pp. 10-23 ◽  
Author(s):  
Spencer G. Sealy
Keyword(s):  
Clutch Size ◽  
Breeding Phenology ◽  
Marbled Murrelet

Pacific herring (Clupea pallasii) consumption by marine birds during winter in Prince William Sound, Alaska

2015 ◽  
Vol 24 (1) ◽  
pp. 1-13 ◽  
Author(s):  
Mary Anne Bishop ◽  
Jordan T. Watson ◽  
Kathy Kuletz ◽  
Tawna Morgan
Keyword(s):  
Pacific Herring ◽  
Prince William Sound ◽  
Marine Birds ◽  
Clupea Pallasii

scholarly journals The Status of Marine Birds Breeding in the Barents Sea Region

Waterbirds ◽  
2000 ◽  
Vol 23 (3) ◽  
pp. 525
Author(s):  
David N. Nettleship ◽  
T. Anker-Nilssen ◽  
V. Bakken ◽  
H. Strøm ◽  
A. N. Golovkin ◽  
...  
Keyword(s):  
Barents Sea ◽  
Marine Birds ◽  
The Barents Sea ◽  
The Status

Recognition of larvae of the Tetrabothriidae (Eucestoda): implications for the origin of tapeworms in marine homeotherms

1987 ◽  
Vol 65 (4) ◽  
pp. 997-1000 ◽  
Author(s):  
Eric P. Hoberg
Keyword(s):  
Life History ◽  
Phylogenetic Relationships ◽  
Host Switching ◽  
Larval Morphology ◽  
Dominant Group ◽  
Marine Birds ◽  
Marine Communities ◽  
Definitive Evidence ◽  
Life History Patterns ◽  
Ecological Associations

The Tetrabothriidae represent the dominant group of cestodes, previously known only as adult parasites, in marine birds and mammals. Recognition of their unique plerocercoid larvae provides the first definitive evidence for life history patterns and phylogenetic relationships with other cestodes. Affinities of the Tetrabothriidae and Tetraphyllidea, cestodes of elasmobranchs, are indicated by larval morphology and ontogeny. However, patterns of sequential heterochrony in the ontogeny of the adult scolex of Tetrabothrius sp. appear to be unique among the Eucestoda. Tetrabothriids constitute a fauna that originated by host switching from elasmobranchs to homeotherms, via ecological associations, following invasion of marine communities by birds and mammals in the Tertiary.

scholarly journals Energetics of communal roosting in chestnut-crowned babblers: implications for group dynamics and breeding phenology

2016 ◽  
Vol 219 (21) ◽  
pp. 3321-3328 ◽  
Author(s):  
Mark A. Chappell ◽  
William A. Buttemer ◽  
Andrew F. Russell
Keyword(s):  
Group Dynamics ◽  
Breeding Phenology ◽  
Communal Roosting
Sign in / Sign up

Export Citation Format

Share Document