Dependence of Postjuvenile Moult on Hatching Date, Condition and Sex in the Great Tit

1999 ◽  
Vol 30 (4) ◽  
pp. 437 ◽  
Author(s):  
Julia G. Bojarinova ◽  
Esa Lehikoinen ◽  
Tapio Eeva
Keyword(s):  
Great Tit ◽  
Hatching Date ◽  
Postjuvenile Moult

Variation in the extent of postjuvenile moult in the Great Tit near Lake Ladoga (Russia)

Bird Study ◽  
1996 ◽  
Vol 43 (1) ◽  
pp. 47-59 ◽  
Author(s):  
T.A. Rymkevich ◽  
J.G. Bojarinova
Keyword(s):  
Great Tit ◽  
Lake Ladoga ◽  
Postjuvenile Moult

Effect of Experimentally Altered Brood Size on Frequency and Timing of Second Clutches in the Great Tit

The Auk ◽  
1987 ◽  
Vol 104 (4) ◽  
pp. 700-706 ◽  
Author(s):  
Henrik G. Smith ◽  
Hans Källander ◽  
Jan-Åke Nilsson
Keyword(s):  
Brood Size ◽  
Parus Major ◽  
Reproductive Development ◽  
Great Tit ◽  
Lower Probability ◽  
Hatching Date ◽  
Fledgling Survival ◽  
First Clutch ◽  
Second Clutch ◽  
Food Depletion

Abstract Brood size in the Great Tit (Parus major) was manipulated (increased, decreased, or unchanged) when nestlings were 5 days old. Both the frequency of second clutches and the interbrood interval were affected. The number of nestlings and hatching date, but not nestling and female mass, differed between first broods followed and not followed by second clutches. Hatching date and the number of nestlings in the first brood explained most of the variation in interbrood interval, whereas female mass did not contribute. Feeding first-brood nestlings and fledglings is an energy-demanding process, and the female may have to allocate resources to brood-feeding at the expense of reproductive development. Furthermore, a larger brood requires a longer period of feeding than a smaller brood. These circumstances probably explain why the size of the first brood affects the timing of the second clutch. Female condition and food depletion of the territory do not seem to be important. Because late second clutches have a lower probability of fledgling survival than do earlier ones-and consequently are of lower value from the female's standpoint-a large first clutch may delay laying to the point that a second clutch is not worthwhile. We conclude that a female's decision whether to lay a second clutch is a strategic one based on the value of the second clutch; a female that "decides" to lay a second clutch starts as quickly as possible.

Seasonal decline in health status of Great Tit (Parus major) nestlings

2001 ◽  
Vol 79 (10) ◽  
pp. 1829-1833 ◽  
Author(s):  
Anna Dubiec ◽  
Mariusz Cichoñ
Keyword(s):  
Seasonal Variation ◽  
Health Status ◽  
Parus Major ◽  
Blood Parameters ◽  
Great Tit ◽  
Hatching Date ◽  
Offspring Survival ◽  
Significant Difference ◽  
Seasonal Decline ◽  
The Relationship

Seasonal variation in offspring survival and recruitment rates in birds may be mediated by immune function, as it defines the ability of individuals to protect themselves against parasites and infectious diseases. To investigate the relationship between hatching date and health status of Great Tit (Parus major) nestlings, two blood parameters (leukocyte level and haematocrit) were estimated. Leukocyte level decreased as the season progressed within first but not second broods, while haematocrit showed no seasonal variation within either brood type. However, nestlings from first broods had both higher leukocyte levels and higher haematocrit than nestlings from second broods. Nestling body condition (defined as the residual of body mass on tarsus length calculated from linear regression) was not related to hatching date within brood type, while a significant difference between brood types was found. We suggest that the commonly observed decline in juvenile survival rate as the season progresses may be at least partly attributed to seasonal changes in health status.

Breeding biology of the Great Tit in two maritime pine forests in the region of Figueira da Foz (Beira Litoral, Portugal)

2005 ◽  
Vol 1 (1) ◽  
Author(s):  
R. A. Costa ◽  
J. M. S. Petronilho ◽  
José Vingada
Keyword(s):  
Great Tit ◽  
Breeding Biology ◽  
Maritime Pine ◽  
Pine Forests

Variation of Heterophil-to-Lymphocyte Ratio in the Great Tit Parus major — a Review

2019 ◽  
Vol 53 (2) ◽  
pp. 103 ◽  
Author(s):  
Joanna Skwarska
Keyword(s):  
Parus Major ◽  
Great Tit ◽  
Lymphocyte Ratio

Great Tit (Parus major)

2020 ◽  
Author(s):  
Andrew Gosler ◽  
Peter Clement ◽  
David Christie
Keyword(s):  
Parus Major ◽  
Great Tit

Environmental Stochasticity and Extinction Risk in a Population of a Small Songbird, the Great Tit

1998 ◽  
Vol 151 (5) ◽  
pp. 441
Author(s):  
Saether ◽  
Engen ◽  
Islam ◽  
McCleery ◽  
Perrins
Keyword(s):  
Extinction Risk ◽  
Great Tit ◽  
Environmental Stochasticity

scholarly journals Anyone listening? No evidence for eavesdropping on male singing interactions in the great tit, Parus major

2021 ◽  
Vol 176 ◽  
pp. 67-76
Author(s):  
Nina Bircher ◽  
Kees van Oers ◽  
Marc Naguib
Keyword(s):  
Parus Major ◽  
Great Tit

scholarly journals Proximate Factors Determining Age and Mass at Fledging in Rhinoceros Auklets (Cerorhinca Monocerata): Intra- and Interyear Variations

The Auk ◽  
2004 ◽  
Vol 121 (2) ◽  
pp. 452-462 ◽  
Author(s):  
Tomohiro Deguchi ◽  
Akinori Takahashi ◽  
Yutaka Watanuki
Keyword(s):  
Growth Rate ◽  
Wing Length ◽  
Linear Regression Analysis ◽  
Multiple Linear Regression Analysis ◽  
Major Effect ◽  
Timing Of Breeding ◽  
Hatching Date ◽  
Cerorhinca Monocerata ◽  
Parental Provisioning ◽  
Underlying Mechanisms

Abstract In alcids, growth rate and hatching date of chicks appear to affect fledging age and mass. Underlying mechanisms are hypothesized to be (1) critical wing length at fledging for postfledging survival, (2) synchronization of fledging to dilute predation risk, and (3) variable parental provisioning according to timing of breeding. To elucidate the effects of growth rate and hatching date on fledging age and mass, and to test those mechanistic hypotheses, we measured chick growth and fledging periods in Rhinoceros Auklets (Cerorhinca monocerata) at Teuri Island from 1995 to 2000. The multiple-linear regression analysis showed that intrayear variations of fledging age and mass were explained by growth rate or hatching date in five out of six years. Faster-growing chicks fledged younger and heavier, and earlier-hatched chicks fledged older and heavier. Consequently, no apparent correlation between fledging age and mass was observed in five out of six years. Analysis of interyear variation showed a negative correlation between fledging age and mass, which indicates that growth rates rather than hatching dates had a major effect. Wing length at fledging was independent of growth in mass. More than 80% of chicks fledged when they attained a narrow range of wing length (130–150 mm), presumably because they remained in their nests until they attained the critical wing length. In five out of six years, the chicks did not synchronize timing of fledging relative to timing of hatching. Later-hatched chicks attained lighter peak masses and at younger ages, which may indicate that their parents decreased provisioning rates when the chicks were still young. We suggest that (1) critical wing length at fledging and (2) variable parental provisioning according to timing of breeding could be underlying mechanisms determining these relationships between fledging age and mass.

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