Optimal clutch size for quality control of bisexual and Wolbachia ‐infected thelytokous lines of Trichogramma dendrolimi Matsumura (Hymenoptera: Trichogrammatidae) mass reared on eggs of a substitutive host, Antheraea pernyi Guérin‐Méneville (Lepidoptera: Saturniidae)

2020 ◽  
Vol 76 (8) ◽  
pp. 2635-2644
Author(s):  
Jin‐Cheng Zhou ◽  
Quan‐Quan Liu ◽  
Qian‐Ru Wang ◽  
Su‐Fang Ning ◽  
Wu‐Nan Che ◽  
...  

1987 ◽  
Vol 130 (6) ◽  
pp. 839-863 ◽  
Author(s):  
R. F. Rockwell ◽  
C. S. Findlay ◽  
F. Cooke




2018 ◽  
Vol 92 (2) ◽  
pp. 707-713 ◽  
Author(s):  
Tian-Hao Li ◽  
Chun-Yu Tian ◽  
Lian-Sheng Zang ◽  
Yang-Yang Hou ◽  
Chang-Chun Ruan ◽  
...  




1975 ◽  
Vol 109 (970) ◽  
pp. 677-699 ◽  
Author(s):  
Warren Y. Brockelman


2004 ◽  
Vol 29 (4) ◽  
pp. 429-436 ◽  
Author(s):  
Hideki Kagata ◽  
Takayuki Ohgushi


1991 ◽  
Vol 5 (3) ◽  
pp. 351 ◽  
Author(s):  
A. P. Moller




1993 ◽  
Vol 71 (11) ◽  
pp. 2141-2146 ◽  
Author(s):  
Christoph Steeger ◽  
Ronald C. Ydenberg

We studied the breeding performance of ospreys (Pandion haliaetus) in southeastern British Columbia from 1987 to 1990. Clutch size, brood size, and the number of young fledged per nest all declined significantly as clutch initiation date was delayed. The quality of later born young as measured by growth rate and the number of fault bars in rectrices did not seem to be reduced. Behavioural observations of the flight-hunting performance of six focal males demonstrated that food availability did not decline in the course of the nestling period. Clutch initiation of some osprey pairs was naturally delayed when their nests were occupied by Canada geese (Branta canadensis). Nest occupation delayed clutch initiation by 9.4 days on average, and reduced clutch size by 0.2 eggs. Osprey pairs possessing an alternate nest were not delayed by the presence of geese in their primary nest, and did not reduce clutch size, suggesting that the clutch size reduction was a direct response to the delay, rather than to the presence, of geese. The results do not support the reduced food availability or reduced breeding commitment hypotheses for seasonal clutch size decline. The data conform to the predictions of the hypothesis that the optimal clutch size is set by a trade-off between the declining reproductive value of later hatched nestlings and the delay required to be able to enlarge the clutch.



Sign in / Sign up

Export Citation Format

Share Document