Geographic variation in embryonic development time and stage of diapause in a grasshopper

Oecologia ◽  
1994 ◽  
Vol 97 (2) ◽  
pp. 179-185 ◽  
Author(s):  
Hugh Dingle ◽  
Timothy A. Mousseau
Keyword(s):  
Embryonic Development ◽  
Geographic Variation ◽  
Development Time

Embryonic development of the newt Triturus italicus in relation to temperature

1998 ◽  
Vol 19 (4) ◽  
pp. 345-355 ◽  
Author(s):  
S. Tripepi ◽  
F. Rossi ◽  
G. Peluso
Keyword(s):  
Embryonic Development ◽  
Development Time ◽  
Normal Development ◽  
Different Temperatures

AbstractThe embryonic development of Triturus italicus was observed at different temperatures. Normal development occurred between 10°C and 22.5°C. In this range of temperatures an hyperbolic relationship between development time and temperature was confirmed.

Clutch size influences embryonic stages at oviposition in a lizard with prolonged egg retention

2017 ◽  
Vol 38 (4) ◽  
pp. 557-561 ◽  
Author(s):  
Thomas Foucart ◽  
Benoit Heulin ◽  
Olivier Lourdais
Keyword(s):  
Body Size ◽  
Embryonic Development ◽  
Clutch Size ◽  
Development Time ◽  
Reproductive Effort ◽  
Resource Limitation ◽  
Egg Retention ◽  
Zootoca Vivipara ◽  
Female Relative ◽  
Clutch Mass

We examined the possible interaction between reproductive effort and embryonic stages at oviposition in oviparous form of the lizard Zootoca vivipara. Our results reveal that the percentage of total embryonic development time (%TEDT) reached at oviposition is negatively correlated to clutch size (adjusted to maternal body size). We found no influence of reproductive burden of female (relative clutch mass, RCM) on %TEDT. The significant effect of fecundity supports the hypothesis that a resource limitation such as oxygen may exist for developing embryos in oviducts. The absence of RCM effect suggests that the available space (abdominal burdening of the mother) does not limit the embryonic stages at oviposition.

scholarly journals Quiescence in Aedes aegypti: Interpopulation Differences Contribute to Population Dynamics and Vectorial Capacity

Insects ◽  
2018 ◽  
Vol 9 (3) ◽  
pp. 111 ◽  
Author(s):  
Luciana Oliva ◽  
Roseli La Corte ◽  
Marcelo Santana ◽  
Cleide Albuquerque
Keyword(s):  
Population Dynamics ◽  
Embryonic Development ◽  
Aedes Aegypti ◽  
Development Time ◽  
Mosquito Species ◽  
Vectorial Capacity ◽  
Control Measures ◽  
Adult Size ◽  
Egg Viability ◽  
Male Predominance

The strategy of Aedes aegypti to prolong embryonic viability by quiescence has severe implications for geographic expansion and maintenance of mosquito populations in areas under control measures. We evaluated the effects of quiescence on biological parameters directly or indirectly associated with population dynamics and vectorial capacity in populations of this mosquito species from two Brazilian municipalities characterized as dengue, chikungunya, and Zika transmission areas. Egg viability, initial hatching time, post-embryonic development time, adult emergence rate, sexual proportion, adult size, fecundity, and fertility were analyzed using eggs stored for 10, 40, 70, 100, 130, and 160 d. Quiescence time reduced overall egg viability and post-embryonic development time in both municipalities but was more costly in Aracaju (100 d, 8 d) than in Recife (130 d, 7.5 d). Emergence rates increased in Recife when the eggs were older, but not in Aracaju. Significant deviations in sexual proportion, with male predominance, were observed in both populations. Initial hatch, fecundity, fertility, and adult size did not significantly influence egg quiescence time. These results indicate intrinsic and differential characteristics for each A. aegypti population, suggesting a differential cost of quiescence for population dynamics parameters that can indirectly affect vectorial capacity and control measures.

scholarly journals Embryonic development time of Penilia avirostris Dana, 1852 in a tropical bay in Brazil

2004 ◽  
Vol 64 (4) ◽  
pp. 891-894
Author(s):  
J. L. Valentin ◽  
A. Marazzo
Keyword(s):  
Surface Water ◽  
Embryonic Development ◽  
Water Temperature ◽  
Development Time ◽  
Brood Pouch ◽  
Maturity Stage ◽  
Guanabara Bay ◽  
Tropical Bay

Development time of embryos in the brood pouch of the cladoceran Penilia avirostris Dana, 1852, was estimated by collecting zooplankton daily for 15 days in surface water of Guanabara Bay, Brazil. Each day the maturity stage of embryos of 90 parthenogenic females was noted. Total development time (egg to birth) varied from 2 to 3 days, the immature phase (stages I to IV) being generally longer (2 days) than intermediate and mature phases (1 day, stages V to XII). Similar results were obtained from Bottrell's equation, which takes water temperature into account.

scholarly journals The Physiological Basis of Geographic Variation in Rates of Embryonic Development within a Widespread Lizard Species

2010 ◽  
Vol 176 (4) ◽  
pp. 522-528 ◽  
Author(s):  
Wei‐Guo Du ◽  
Daniel A. Warner ◽  
Tracy Langkilde ◽  
Travis Robbins ◽  
Richard Shine
Keyword(s):  
Embryonic Development ◽  
Geographic Variation ◽  
Lizard Species ◽  
Physiological Basis
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