Influence of temperature on life-history characteristics of two sibling species of Eurycercus (Cladocera, Chydoridae)

1985 ◽  
Vol 63 (4) ◽  
pp. 891-898 ◽  
Author(s):  
B. J. Hann
Keyword(s):  
Life History ◽  
Sibling Species ◽  
Brood Size ◽  
Development Time ◽  
Egg Development ◽  
Temperature Function ◽  
Life History Characteristics ◽  
Dependent Change ◽  
Influence Of Temperature On ◽  
Specific Variation

Life history characteristics of two sibling species of chydorid Cladocera, Eurycercus (Bullatifrons) longirostris and E. (B.) vernalis, were determined under controlled laboratory conditions. Temperature-dependent change in embryonic development time was described by the Bělehrádek rate–temperature function. Intra- and inter-specific variation was considerable and underlines the need for population-specific determinations of egg development time over a wide temperature range (especially low temperatures) if secondary production is to be assessed reliably. The relationships between (i) egg development time and (ii) generation time with temperature in geographically separated populations of both species exhibited compensation. The interaction between age-specific fecundity and temperature is discussed in relation to population dynamics. Values of r declined with temperature and, although comparable to those calculated for littoral Cladocera, are lower than most estimates available for limnetic species. Finally, the life history traits employed by these two large-bodied species with variable brood size are contrasted with those of the small species of chydorids with maximum brood size of two eggs.

Effects of environmental warming during early life history on libellulid odonates

2017 ◽  
Vol 95 (6) ◽  
pp. 373-382 ◽  
Author(s):  
D.N. Frances ◽  
J.Y. Moon ◽  
S.J. McCauley
Keyword(s):  
Life History ◽  
Intraspecific Variation ◽  
Climate Warming ◽  
Early Life ◽  
Development Time ◽  
Early Life History ◽  
Thermal Variation ◽  
Egg Development ◽  
Measured Time ◽  
Hatchling Size

Climate warming affects ectotherms globally, yet we know little regarding the variability in species’ responses to warming, particularly in early life stages. Additionally, intraspecific variation in response to warming is understudied but may determine species’ resilience to warming. To assess how temperature affects egg development rate in co-occurring dragonfly species, we manipulated temperature (range: 22–31 °C) and measured time to hatching. Warming decreased egg development time across all species, indicating that while climate warming will advance hatching phenology, maintained synchrony in hatching order will likely not affect species interactions. Our second experiment examined early life-history responses to warming in the dot-tailed whiteface (Leucorrhinia intacta (Hagen, 1861)) dragonfly. We measured time to hatching, hatchling size, growth rate, and survival at four temperatures (23–30 °C), including a treatment with increased thermal variation. Warming resulted in smaller hatchlings with increased growth and mortality rates, whereas higher thermal variation did not have effects different from those of warming alone. We observed significant intraspecific variation in the responses to warming in both egg development time and hatchling size and this variation was correlated with date of oviposition. High levels of intraspecific variation may be important in buffering populations from the effects of climate warming.

Prediction of Egg Development Times of Freshwater Copepods

1978 ◽  
Vol 35 (10) ◽  
pp. 1322-1329 ◽  
Author(s):  
John M. Cooley ◽  
Charles K. Minns
Keyword(s):  
Development Time ◽  
Simple Procedure ◽  
Egg Development ◽  
Egg Hatching ◽  
Temperature Function ◽  
Is Development ◽  
Freshwater Copepods ◽  
The Relationship ◽  
Hatching Temperature

Available literature data on the relationship between freshwater copepod egg development time and temperature were summarized and fitted where possible to Bělehrádek's temperature function[Formula: see text]where D is development time, T is temperature, a, b, and α are fitted constants. In the calanoids, and to a lesser extent cyclopoids, a and α were predictably related as were α and in situ egg hatching temperature (TH) when b was assumed to be constant for all copepods. This information was used to describe a simple procedure whereby a curve relating egg development and temperature could be constructed by only knowing TH and applying it to Bělehrádek's temperature function. Key words: Calanoidea, Cyclopoidea, zooplankton, temperature, production assessment

Development, Survival, and Fecundity of the Potato Aphid, Macrosiphum euphorbiae (Thomas), at Constant Temperatures

1962 ◽  
Vol 94 (6) ◽  
pp. 667-671 ◽  
Author(s):  
C. A. Barlow
Keyword(s):  
Life History ◽  
Macrosiphum Euphorbiae ◽  
Potato Aphid ◽  
Influence Of Temperature ◽  
Controlled Conditions ◽  
Influence Of Temperature On

Life-history and development of Macrosiphum euphorbiae (Thomas) have been studied by Smith (1919), Patch (1925), and MacGillivray and Anderson (1958). In most of these studies, considerable variation in temperature was experienced. The effects of different constant temperatures have never been reported. The following experiments were conducted to determine the influence of temperature on development, survival, and fecundity of M. euphorbiae under closely controlled conditions.

Life history characteristics of an invasive cyprinid fish (Carassius gibelio) in Chimaditis Lake (northern Greece)

2008 ◽  
Vol 24 (2) ◽  
pp. 213-217 ◽  
Author(s):  
I. D. Leonardos ◽  
A. C. Tsikliras ◽  
V. Eleftheriou ◽  
Y. Cladas ◽  
I. Kagalou ◽  
...  
Keyword(s):  
Life History ◽  
Cyprinid Fish ◽  
Northern Greece ◽  
Carassius Gibelio ◽  
Life History Characteristics

Adaptive strategies and life history characteristics in a warming climate: Salmon in the Arctic?

2012 ◽  
Vol 96 (10-11) ◽  
pp. 1187-1226 ◽  
Author(s):  
Jennifer L. Nielsen ◽  
Gregory T. Ruggerone ◽  
Christian E. Zimmerman
Keyword(s):  
Life History ◽  
Adaptive Strategies ◽  
The Arctic ◽  
Warming Climate ◽  
Life History Characteristics

Laboratory observations on early development of the oncaeid copepod Triconia canadensis from the mesopelagic zone of the western subarctic Pacific

2007 ◽  
Vol 87 (2) ◽  
pp. 479-482 ◽  
Author(s):  
Yuichiro Nishibe ◽  
Tsutomu Ikeda
Keyword(s):  
Lipid Droplets ◽  
Development Time ◽  
Hatching Success ◽  
Egg Development ◽  
Egg Hatching ◽  
Subarctic Pacific ◽  
Western Subarctic Pacific ◽  
Mesopelagic Zone ◽  
Life Cycle Strategy

Egg development time and hatching success were determined for the oncaeid copepod, Triconia canadensis, from the mesopelagic zone of the western subarctic Pacific. The egg development time was estimated to be 74.7–84.5 days at in situ temperature (3°C), which is much longer than those reported previously on the other oncaeid copepods even if the differences in experimental temperatures are taken into account. The egg hatching success varied between 50 and 100%, with a grand mean of 88%. The newly hatched nauplii of T. canadensis were elongate ellipsoid in shape, and had many large-sized lipid droplets in their body. Possible adaptive significance of apparent longer egg developmment time of T. canadensis is discussed in the light of their life cycle strategy.

Population dynamics of Stenothoe valida Dana, 1852 (Amphipoda, Stenothoidae) at Cheongsapo beach of Busan, Republic of Korea

Crustaceana ◽  
2021 ◽  
Vol 94 (4) ◽  
pp. 413-429
Author(s):  
Ye Ji Lee ◽  
Won Gyu Park
Keyword(s):  
Population Dynamics ◽  
Life History ◽  
Sex Ratio ◽  
Brood Size ◽  
Ovigerous Female ◽  
Seasonal Pattern ◽  
Recruitment Rate ◽  
Republic Of Korea ◽  
Female Size ◽  
History Of

Abstract The population dynamics of Stenothoe valida Dana, 1852 were studied at Cheongsapo beach of Busan, Republic of Korea, from March 2019 to March 2020. Sampling was conducted once a month at low tide during spring tides. Specimens were grouped by the cephalic length at 0.025 mm intervals, and classified into four categories: females, ovigerous females, males and juveniles. The sex ratio, defined as females : total males + females, exceeded 0.5 during most of the study period. Brood size was significantly coupled with ovigerous female size. Two to four cohorts appeared at each study period. New cohorts occurred at almost every sampling except in the samples Jun-2, and Nov-2. Life span was estimated at 1-2 months. The juvenile ratio, the ratio of ovigerous females, and the recruitment rate estimated by FiSAT were commonly high in summer and winter. The life history of S. valida was not coupled with water temperature, but had a strong seasonal pattern.

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