scholarly journals Slight differences in incubation temperature affect early growth and stress endocrinology of wood duck (Aix sponsa) ducklings

2009 ◽  
Vol 213 (1) ◽  
pp. 45-51 ◽  
Author(s):  
S. E. DuRant ◽  
G. R. Hepp ◽  
I. T. Moore ◽  
B. C. Hopkins ◽  
W. A. Hopkins
Keyword(s):  
Incubation Temperature ◽  
Early Growth ◽  
Aix Sponsa ◽  
Wood Duck

Wood Duck (Aix sponsa)

1995 ◽  
Author(s):  
Gary R. Hepp ◽  
Frank C. Bellrose
Keyword(s):  
Aix Sponsa ◽  
Wood Duck

Incubation temperature and clutch effects on initial body sizes and growth rates in green iguana hatchlings (Iguana iguana)

2017 ◽  
Vol 67 (3-4) ◽  
pp. 239-249 ◽  
Author(s):  
Yuleimis T. Martínez-Caballero ◽  
Brian C. Bock ◽  
Isabel Pérez ◽  
Ángela M. Ortega-León ◽  
Vivian P. Páez
Keyword(s):  
Growth Rate ◽  
Body Size ◽  
Growth Rates ◽  
Egg Size ◽  
Incubation Temperature ◽  
Size Variation ◽  
Early Growth ◽  
Rate Variation ◽  
Body Sizes ◽  
Green Iguanas

Large initial body size and rapid early growth rate are important in many species, both because predation rates decline as individuals grow and because females that attain a larger adult body size are more fecund. To identify possible factors contributing to size and growth rate variation in hatchling green iguanas, we artificially incubated six clutches at three constant temperatures to test for effects of incubation temperature and/or clutch effects on initial size and growth rate. Higher incubation temperatures resulted in significantly shorter incubation periods but did not influence initial body size. There were significant differences among clutches in egg size, and also in initial hatchling body size, even after correcting for differences in egg size among clutches. A subset of hatchlings from each nest was reared in semi-natural conditions for four months, with individuals from the high incubation temperature condition exhibiting the slowest longer-term growth rates. No clutch effects were detected in the growth rate analyses. The observed variation in early growth rate of juvenile iguanas seems to be selectively important and this variation may be due in part to the conditions the eggs experience during incubation, but clutch effects in this study were limited to egg size and initial hatchling body size variation, but were not found for subsequent growth rates.

EFFECT OF PSEUDOMONADS AND ACHROMOBACTERACEAE ON GROWTH OF STAPHYLOCOCCUS AUREUS1,2

1966 ◽  
Vol 29 (5) ◽  
pp. 161-164 ◽  
Author(s):  
Erlinda N. Seminiano ◽  
W. C. Frazier
Keyword(s):  
Staphylococcus Aureus ◽  
Lactic Acid ◽  
Lactic Acid Bacteria ◽  
Pseudomonas Fluorescens ◽  
Incubation Temperature ◽  
Alcaligenes Faecalis ◽  
Early Growth ◽  
Initial Ratio ◽  
Pseudomonas Species ◽  
Different Temperatures

Summary Pseudomonas and Achromobacteraceae cultures, mostly from foods, were tested for their effect on the growth of Staphylococcus aureus 196E in Trypticase Soy Broth at different temperatures (10 to 30 C) and with different ratios of effectors to staphylococci in inocula. Most cultures inhibited the staphylococcus, with inhibition becoming greater with decreasing proportions of S. aureus in the inoculum and decreasing temperatures of incubation, but inhibition usually was not as great as had been found with most coliform and lactic acid bacteria. Only a few of the Pseudomonas cultures could keep numbers of S. aureus below 5 × 106 cells per ml, even with an initial ratio of effectors to staphylococci of 100 : 1 and a low incubation temperature, although most cultures of Pseudomonas and Achromobacteraceae delayed the attainment of these numbers. Especially effective in inhibition of S. aureus were strains of Pseudomonas striata and P. mildenbergii or convexa, and a culture of Alcaligenes viscolactis. At 15 C Pseudomonas fluorescens, Alcaligenes faecalis, and Achromobacter xerosis stimulated S. aureus enough during early growth to hasten the attainment of hazardous numbers of staphylococci by several hours. At 15, 25 and 30 C most cultures, however, delayed the growth of S. aureus, and all kept maximal numbers of staphylococci below those reached by the coccus growing alone, although numbers usually were less by only about one- to two-thirds. Most strains of two Pseudomonas species affected S. aureus similarly, and the effects of eight species of effectors on two strains of S. aureus were, for the most part, similar.

Note: Imprint Ability of Goldeneyes (Bucephala Clangula)

1970 ◽  
Vol 27 (3) ◽  
pp. 981-982
Author(s):  
Tore Bjerke ◽  
Leif G. Bjerke
Keyword(s):  
Species Identification ◽  
Emotional Development ◽  
Auditory Training ◽  
Aix Sponsa ◽  
Bucephala Clangula ◽  
High Level ◽  
Wood Duck

17 Goldeneye ducklings were exposed to traditional audiovisual and auditory training stimuli 12 to 20 hr. after hatching. None of the ducklings followed the stimuli, which suggests differences in the mechanisms mediating species-identification between this species and the earlier studied Wood duck ( Aix sponsa). The differences are ascribed to the emotional development of Goldeneyes, since all individuals showed a high level of fear responding during testing.

Effects of incubation delay on viability and microbial growth of Wood Duck (Aix sponsa) eggs

The Auk ◽  
2011 ◽  
Vol 128 (4) ◽  
pp. 663-670 ◽  
Author(s):  
Johnathan G. Walls ◽  
Gary R. Hepp ◽  
Lori G. Eckhardt
Keyword(s):  
Microbial Growth ◽  
Aix Sponsa ◽  
Wood Duck

Aix sponsa (Wood duck) 2n = 80

1973 ◽  
pp. 157-159
Author(s):  
Maria Luiza Beçak ◽  
Willy Beçak ◽  
Franklin L. Roberts ◽  
Robert N. Shoffner ◽  
E. Peter Volpe
Keyword(s):  
Aix Sponsa ◽  
Wood Duck

Wood Duck (Aix sponsa)

2013 ◽  
Author(s):  
Gary R. Hepp ◽  
Frank C. Bellrose
Keyword(s):  
Aix Sponsa ◽  
Wood Duck

Incubation temperature influences locomotor performance in young wood ducks (Aix sponsa)

2011 ◽  
Vol 315A (5) ◽  
pp. 274-279 ◽  
Author(s):  
Brittney Cole Hopkins ◽  
Sarah Elizabeth DuRant ◽  
Gary Richard Hepp ◽  
William Alexander Hopkins
Keyword(s):  
Incubation Temperature ◽  
Locomotor Performance ◽  
Aix Sponsa ◽  
Wood Ducks
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