Relationship of egg and hatchling size to incubation temperature in the multiple-spawning fish Gnathopogon caerulescens (Honmoroko)

2014 ◽  
Vol 98 (4) ◽  
pp. 1151-1161 ◽  
Author(s):  
Takeshi Kikko ◽  
Takahiro Usuki ◽  
Daisuke Ishizaki ◽  
Yoshiaki Kai ◽  
Yasuhiro Fujioka
Keyword(s):  
Incubation Temperature ◽  
Multiple Spawning ◽  
Gnathopogon Caerulescens ◽  
Relationship Of ◽  
Hatchling Size

scholarly journals Contributions of source population and incubation temperature to phenotypic variation of hatchling Chinese skinks

2020 ◽  
Author(s):  
Hong-Liang Lu ◽  
Yan-Fu Qu ◽  
Hong Li ◽  
Xiang Ji
Keyword(s):  
Body Mass ◽  
Phenotypic Variation ◽  
Incubation Temperature ◽  
Tail Length ◽  
Population Variation ◽  
Phenotypic Traits ◽  
Source Population ◽  
Relative Importance ◽  
The Difference ◽  
Hatchling Size

Abstract Phenotypic plasticity and local adaptation are viewed as the main factors that result in between-population variation in phenotypic traits, but contributions of these factors to phenotypic variation vary between traits and between species and have only been explored in a few species of reptiles. Here, we incubated eggs of the Chinese skink (Plestiodon chinensis) from 7 geographically separated populations in Southeast China at 3 constant temperatures (24, 28, and 32 °C) to evaluate the combined effects of clutch origin, source population, and incubation temperature on hatchling traits. The relative importance of these factors varied between traits. Nearly all examined hatchling traits, including body mass, snout–vent length (SVL), tail length, head size, limb length, tympanum diameter, and locomotor speed, varied among populations and were affected by incubation temperature. Measures for hatchling size (body mass and SVL) varied considerably among clutches. Source population explained much of the variation in hatchling body mass, whereas incubation temperature explained much of the variation in other examined traits. Our results indicate that between-population variation in hatchling traits of P. chinensis likely reflects the difference in natural incubation conditions and genetic divergence.

Egg mass determines hatchling size, and incubation temperature influences post-hatching growth, of tuatara Sphenodon punctatus

2004 ◽  
Vol 263 (1) ◽  
pp. 77-87 ◽  
Author(s):  
Nicola J. Nelson ◽  
Michael B. Thompson ◽  
Shirley Pledger ◽  
Susan N. Keall ◽  
Charles H. Daugherty
Keyword(s):  
Incubation Temperature ◽  
Egg Mass ◽  
Sphenodon Punctatus ◽  
Hatchling Size

Incubation temperature, energy expenditure and hatchling size in the green turtle (Chelonia mydas), a species with temperature-sensitive sex determination

2001 ◽  
Vol 49 (4) ◽  
pp. 389 ◽  
Author(s):  
David T. Booth ◽  
Katherine Astill
Keyword(s):  
Oxygen Consumption ◽  
Production Cost ◽  
Incubation Temperature ◽  
Chelonia Mydas ◽  
Temperature Sensitive ◽  
Barrier Reef ◽  
Body Dimensions ◽  
Green Turtles ◽  
The Difference ◽  
Hatchling Size

Eggs from the Heron Island, Great Barrier Reef, nesting population of green turtles (Chelonia mydas) were incubated at all-male-determining (26˚C) and all-female-determining (30˚C) temperatures. Oxygen consumption and embryonic growth were monitored throughout incubation, and hatchling masses and body dimensions were measured from both temperatures. Eggs hatched after 79 and 53 days incubation at 26˚C and 30˚C respectively. Oxygen consumption at both temperatures increased to a peak several days before hatching, a pattern typical of turtle embryos, and the rate of oxygen was higher at 30˚C than 26˚C. The total amount of energy consumed during incubation, and hatchling dimensions, were similar at both temperatures, but hatchlings from 26˚C had larger mass, larger yolk-free mass and smaller residual yolks than hatchlings from 30˚C. Because of the difference in mass of hatchlings, hatchlings from 30˚C had a higher production cost.

THE QUANTITATIVE AND QUALITATIVE RELATIONSHIP OF ULTRAVIOLET AND VISIBLE RADIATION TO THE INDUCTION OF REPRODUCTION IN ASCOCHYTA PISI

1962 ◽  
Vol 40 (12) ◽  
pp. 1577-1602 ◽  
Author(s):  
Charles M. Leach
Keyword(s):  
Ultraviolet Radiation ◽  
Incubation Temperature ◽  
Monochromatic Radiation ◽  
Radiation Absorption ◽  
Continuous Exposure ◽  
Visible Radiation ◽  
Near Ultraviolet ◽  
Wide Range ◽  
Ascochyta Pisi ◽  
Relationship Of

Irradiation under either daylight fluorescent lamps or diffuse sunlight stimulated pycnidial development in 40 isolates of Ascochyta pisi. Sporulation varied among these same isolates when grown in darkness, and ranged from none to profuse. Irradiation of selected isolates through filters showed the importance of ultraviolet radiation in stimulating reproduction. The precise relationship of quality, intensity, and length of exposure of radiation to induction of sporulation was studied with monochromatic radiation at 21 °C. Treatment of colonies with monochromatic radiation of wavelengths 2378 Å to 5461 Å (band width 132 Å) at the same intensity of 100 μw/cm2 and with exposures ranging from 1/50 to 20,000 seconds proved conclusively that only ultraviolet radiation induced sporulation. Two wavelengths, 2378 Å and 3131 Å, were notably effective in inducing pycnidial formation over a wide range of exposures. The dosage effective in inducing sporulation decreased with decrease in wavelength. Similarly, the minimum dosage which caused inhibition of sporulation was also least at the shorter wavelengths. Onset and abundance of sporulation differed significantly when the intensity of radiation was varied. The higher the intensity, the shorter was the exposure necessary to stimulate sporulation, or cause inhibition of sporulation. Pycnidia were stimulated by near ultraviolet radiation over a wide range of temperatures (10° to 30 °C), over a wide range of pH values (4.5 to 8.3), and on four commonly used media. Growth (dry weight) under continuous exposure to near ultraviolet radiation did not differ from growth in darkness.The region of mycelium most sensitive to effects of radiation on sporulation at 21 °C was a peripheral zone of young mycelium approximately 1.5 to 2 mm in width. In colonies incubated at a constant temperature of 21 °C, the older mycelium was practically insensitive to radiation. A photoactivated sporulation precursor was able to move small distances from the irradiated peripheral mycelium to newly formed non-irradiated mycelium. Movement of the percursor appeared to be by translocation within hyphae rather than by diffusion through the medium.The location of pycnidia relative to the surface of the medium was dependent on length of exposure and quality and intensity of radiation; absorption of radiation by medium; incubation temperature; and age of mycelium.The size of pycnidia, and the size and shape of conidia both in culture and on the epicotyls of Vicia villosa, were significantly influenced by the dosage and quality of radiation.

The effect of incubation temperature on egg survival, hatchling traits and embryonic use of energy in the blue-tailed skink, Eumeces elegans

2003 ◽  
Vol 53 (1) ◽  
pp. 27-36 ◽  
Author(s):  
Lu Shou ◽  
Wei-Guo Du ◽  
Ji-Ke Liu
Keyword(s):  
Incubation Temperature ◽  
Tail Length ◽  
Yolk Sac ◽  
The Body ◽  
Effect Of Temperature ◽  
Egg Survival ◽  
Different Temperatures ◽  
The Mean ◽  
Locomotor Capacity ◽  
Hatchling Size

AbstractEggs of the skink, Eumeces elegans were incubated at 24, 27, 30 and 33°C to assess the effect of temperature on hatchling traits and embryonic use of energy. The mean incubation periods of eggs incubated at 24, 27, 30 and 33°C were 44.1, 28.0, 23.6 and 20.0 days, respectively. The mortality of embryos incubated at these temperatures did not differ significantly. The mean snoutvent lengths of hatchlings from 30 and 33°C were smaller than those of hatchlings from 24°C. In contrast, the body masses of hatchlings were not affected by temperature. Incubation temperature can also modify limb lengths of hatchlings. The fore and hind limb lengths of hatchlings from 24°C were longer than those of hatchlings from 33°C. However, tail length and head size (length and width) for hatchlings from different temperatures were similar. The locomotor capacity of hatchlings incubated at 33°C was completely destroyed, whereas that of hatchlings from the other three temperatures did not differ significantly in spite of the existence of differences in hatchling size. Moreover, incubation temperature affected the allocation of energy between carcass and yolk sac in the hatchling, although the overall conversion of energy from eggs to hatchlings was not influenced by temperature. Hatchlings from 30 and 33°C had a less developed carcass and more energy in yolk sac than those from 24°C. Thus, we can conclude that 33°C is not suitable for the incubation of E. elegans eggs, due to damage to the embryo.

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