Effect of Temperature on the Hatching Time of Parthenogenetic Eggs of Five Ecdyonurus Spp. and Two Rhithrogena Spp. (Ephemeroptera) from Austrian Streams and English Rivers and Lakes

Humpesch, U. H.

doi:10.2307/4236

Cited by 42 publications

(41 citation statements)

References 12 publications

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“…Parthenogenesis is found in most animal groups (Suomalainen 1950(Suomalainen , 1962Glesener and Tilman 1978;Suomalainen et al 1987) and has been reported in some mayflies (Degrange 1960;Huff and McCafferty 1974;Gibbs 1977;Mingo 1978;Humpesch 1980;Sweeney and Vannote 1987;Glazaczow 2001, Ball 2001, 2002. However, in most mayflies parthenogenesis is only facultative, and is occasional or accidental (i.e., tychoparthenogenesis), such as in the North American burrowing mayfly Ephoron album (Say) (Britt 1962;cf.…”

Section: Origin Of Obligatory Parthenogenesismentioning

confidence: 92%

Reproductive mode of the geographic parthenogenetic mayfly Ephoron shigae, with findings from some new localities (Insecta: Ephemeroptera, Polymitarcyidae)

2006

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The burrowing polymitarcyid mayfly Ephoron shigae is distributed widely in Japan. Some populations are bisexual, others are unisexual, and the distributions of the two types overlap broadly. Experimental evidence of parthenogenetic reproduction, long suspected in unisexual populations, is presented here, based on a comparative analysis of the developmental rate of fertilized and unfertilized eggs. The developmental rate of fertilized eggs from 20 mated females in a bisexual population was 98.4% ± 0.73% (mean ± SD), and no unfertilized eggs from 20 virgin females in that population developed. The developmental rates of unfertilized eggs in two unisexual populations were 89.0% ± 4.59% and 84.2% ± 1.96%, respectively. This article presents experimental evidence of geographic parthenogenesis in E. shigae and provides support for the previous interpretation. In addition, we discuss the relationship between the sex ratio of each population and the developmental rate of fertilized versus unfertilized eggs from the females in those populations.

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Section: Origin Of Obligatory Parthenogenesismentioning

confidence: 92%

Reproductive mode of the geographic parthenogenetic mayfly Ephoron shigae, with findings from some new localities (Insecta: Ephemeroptera, Polymitarcyidae)

2006

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“…Generally the studied species hatched successfully between 9 and 258C. For European mayfly species, the minimum temperature for successful hatching could be as low as 38C (Elliott, 1972;Humpesch, 1980). Incubation time can vary from a few days to about 20 for Australian species (Suter and Bishop, 1990;Brittain and Campbell, 1991;Brittain, 1995), while this period can be longer for northern hemisphere species (see Bohle, 1972;Elliott, 1978;Newell and Minshall, 1978).…”

Section: Discussionmentioning

confidence: 99%

Increased growth and distribution of Ephemerella aurivillii (Ephemeroptera) after hydropower regulation of the Aurland catchment in Western Norway

Raddum

Fjellheim

Velle

2008

River Research & Apps

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The Aurland watershed has been regulated for hydropower since the establishment of a series of power plants during the period 1970-1983. This resulted in a strong reduction of the flow in the river Vassbygdelvi, the inlet river to lake Vassbygdvatn. In the downstream river Aurland, the flow has varied, but from 2000 the intention has been to simulate pre-regulation winter flow as far as possible. The temperature in the river Vassbygdelvi has increased from about 1500 degree-days per year before regulation to above 2000 degree-days after regulation. In the river Aurland the thermal regime, expressed as degree-days per year, was more or less unchanged, but a small reduction in the summer temperature and a corresponding increase during other periods was observed. The mayfly Ephemerella aurivillii (Bengtsson) was not recorded in Vassbygdelvi prior to regulation, but became abundant in the river after. Full-grown larvae were recorded 1-2 months earlier in the river Vassbygdelvi than in the river Aurland after regulation. E. aurivillii has a 1-year life cycle with imagos present in June-August. Young larvae occurred from June to early September. It is concluded that larvae of E. aurivillii could not complete their life cycle within 1 year before regulation in the river Vassbygdelvi, due to low temperature. The study demonstrates how temperature can regulate the distribution of a species with a strict 1-year life cycle.

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“…The composite regression line for the two orders is drawn. Data from the following sources : Benech 1972b, Brittain 1977, Brittain and Lillehammer -1987, Brittain and Mutch 1984, Broch 1986, Elliott 1972, Friesen et al 1979, Haland 1981, Humpesch 1980, Humpesch and Elliott 1980, Lillehammer 1985, 1987a, b, Mutch and Pritchard 1982, Newell and Minshall 1978, Rekstad 1979 Table 2. Regression analysis for the relationship between the two constants 'a' and 'b' in the regression equation for the relationship between water temperature and the length of the egg incubation period in species of Ephemeroptera and Plecoptera.…”

Section: Oenone 5 10mentioning

confidence: 99%

“…The relationship between the length of the egg incubation period (50% hatching) and water temperature for species of Ephemeroptera (left) and Plecoptera (right). Data is from the following sources: Baetis rhodani (Elliott 1972), Ecdyonurus dispar (Humpesch 1980), Tricorythodes minutus (Newell and MinshalI1978),Hexagenia rigida (Friesen et al 1979), Taeniopteryx nebulosa (Brittain 1977), Mesocapnia oenone (Brittain and Mutch 1984), Capnia atra , Dinocras cephalotes (Lillehammer 1987a). Fig.…”

Section: Oenone 5 10mentioning

confidence: 99%

Life History Strategies in Ephemeroptera and Plecoptera

Brittain

1990

Mayflies and Stoneflies: Life Histories and Biology

103

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ABSTRACfThe major part of the life of Ephemeroptera (mayflies) and Plecoptera (stoneflies) is spent in the aquatic environment, while their short terrestrial life is primarily concerned with reproduction. Such a complex cycle passing through two different phases, each having its own selection pressures, places evolutionary constraints on life cycle strategies.Stoneflies are mostly cool water species. They have also evolved brachyptery and mating occurs on the ground or other surface beside the aquatic habitat. In contrast, mayflies are common in tropical waters, show no brachyptery and invariably mate in flight, often at considerable distances from the aquatic habitat.Water temperature is a major factor governing egg development and although showing the same general relationship between water temperature and the length of egg development mayflies have a greater thermal demand and are more temperature dependent than stoneflies. Nymphal growth rates are also compared and related to their life history strategies.Univoltine life cycles are most common in both orders, but in mayflies multivoltine cycles are also common, especially in tropical and temperate regions, whereas semivoltine life cycles are generally restricted to certain taxa. In stoneflies, however, semivoltine cycles are common, while multivoltine cycles are rare.These differences between the two orders explain the greater intrusion of stoneflies into arctic and alpine areas and that of mayflies into the tropics. INTRODUCfIONThe Ephemeroptera and Plecoptera are two small orders of aquatic insects each numbering about 2,000 species. They are widely distributed throughout the world and occur in all continents apart from Antarctica, although poorly represented on oceanicislands. Their conservative dispersal makes them useful objects for biogeographic analysis (e.g. lilies 1965, Rauser 1971, Edmunds 1972.In contrast to representatives of orders such as the Coleoptera and Hemiptera, they are primary I.C. Campbell (ed.) Mayjlies and Stonejlies, 1-12. © 1990 Kluwer Academic Publishers. invaders of the aquatic environment and both orders possessed aquatic nymphs at least 250 million years ago. They have subsequently become highly adapted to the aquatic mode of life, and their immature stages are, with only a few exceptions, exclusively aquatic and restricted to freshwaters. However, both orders have complex life cycles (Wilbur 1980) involving both aquatic and terrestrial phases. Such life cycles create evolutionary dichotomy with selection pressure operating in two, more or less independent, environments. Such dichotomy will theoretically lead to the reduction of either the terrestrial or 2 aquatic phase. Coordinated evolution between the two phases may occur, but this will retard evolutionary change in general (Istock 1967).A reduction in one of the phases has clearly happened in both orders, notably in the Ephemeroptera, but also to a considerable degree in the Plecoptera. The adult stage in both orders is of limited duration and has almost the sole funct...

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Effect of Temperature on the Hatching Time of Parthenogenetic Eggs of Five Ecdyonurus Spp. and Two Rhithrogena Spp. (Ephemeroptera) from Austrian Streams and English Rivers and Lakes

Cited by 42 publications

References 12 publications

Reproductive mode of the geographic parthenogenetic mayfly Ephoron shigae, with findings from some new localities (Insecta: Ephemeroptera, Polymitarcyidae)

Reproductive mode of the geographic parthenogenetic mayfly Ephoron shigae, with findings from some new localities (Insecta: Ephemeroptera, Polymitarcyidae)

Increased growth and distribution of Ephemerella aurivillii (Ephemeroptera) after hydropower regulation of the Aurland catchment in Western Norway

Life History Strategies in Ephemeroptera and Plecoptera

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