Annual patterns of emergence of some Quebec stoneflies (Insecta: Plecoptera)

Harper, P. P.; Pilon, Jean-Guy

doi:10.1139/z70-126

Cited by 46 publications

(23 citation statements)

References 10 publications

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“…This contrasts with other accounts from temperate habitats (Harper & Pilon, 1970;Harper & Magnin, 1971), but even there protandry was never more than a few days.…”

Section: Discussioncontrasting

confidence: 97%

Associations of aquatic insects (Ephemeroptera, Plecoptera, and Trichoptera) in a network of subarctic lakes and streams in Qu�bec

Harper

1990

Hydrobiologia

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As part of an impact assessment of large hydroelectric projects in the James Bay drainage in Northwestern Quebec, the aquatic insect communities were studied in a network of rivers, lakes and streams during the summer of 1975. Thirty-eight emergence traps operated over the ice-free season yielded 10 888 insects (5559 Ephemeroptera, 2817 Plecoptera, and 2512 Trichoptera), representing 148 species (respectively 44, 18, and 86), most of temperate and boreal afinities. There was no arctic element.Similarity analyses and clustering procedures on the emergence series revealed the existence of distinct insect communities in the river (fast and slow sections), the streams (fast and slow), the lakes and the bogs, each characterized by a particular assemblage of species. Many of the species were more or less ubiquitous and differences between communities were marked more by changes in the dominance of the species and differences in the frequency distributions, than absolute shifts in the species lists. The yields in the traps set in fast water were much greater than those in slow running water, and these in turn greater than those of standing water.By comparison with more southerly sites, the seasonal succession of species was retarded in the spring and early summer, but was not shortened appreciably in the fall. The usual emergence patterns associated with these taxa was observed, namely those of spring, summer and autumn species.

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“…This contrasts with other accounts from temperate habitats (Harper & Pilon, 1970;Harper & Magnin, 1971), but even there protandry was never more than a few days.…”

Section: Discussioncontrasting

confidence: 97%

Associations of aquatic insects (Ephemeroptera, Plecoptera, and Trichoptera) in a network of subarctic lakes and streams in Qu�bec

Harper

1990

Hydrobiologia

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“…This represents a substantial departure from the restricted emergence period in late May reported by Harper &Magnin( 1969) in Quebec and Neves (1978) in Massachusetts. Harper & Pilon (1970) reported emergence form a Quebec stream only in June and in both Quebec studies young of the next generation were not found until October. The nonsynchronous growth of nymphs in Quebec and in northeastern Alberta were similar.…”

Section: Plecopteramentioning

confidence: 88%

Oberservations on the life histories and biology of Ephemeroptera and Plecoptera in northeastern Alberta

Barton¹

1980

Aquatic Insects

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During studies of the environmental effects of oil sands development in northeastern Alberta in 1976Alberta in -1977 species of Ephemeroptera and 21 of Plecoptera were collected using various techniques. Individuals of 18 mayflies and 17 stoneflies were taken in numbers sufficient to determine their basic life histories and habitat preferences. Among the mayflies, 8 (possibly 10) species exhibited fast seasonal development, 8 slow seasonal, and 2 non-seasonal. Among the Plecoptera, these patterns were exhibited by 5, 7 and 5 species, respectively. Nymphs of most fast seasonal mayflies developed in pools and silty backwaters, often in association with aquatic macrophytes. Slow seasonal mayflies and most stoneflies were found in riffles, or on bedrock and debris in the Athabasca River. The fauna included a mixture of Eastern, northern and cordilleran species. Eastern species probably reached the Athabasca River drainage via glacial Lake Agassiz.

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“…Whereas insects like odonates undergo a critical final moult on an emergence support in the shore, others like the dipterans emerge directly from the water surface. Consequently, in the traps used for population census, scientists like Harper & Pilon (1970), Danks & Oliver (1972a, b), Oliver & Danks (1972), , , Harper (1973) estimated population density in terms of number of plecopterans and dipterans, whereas others like Welch (1968Welch ( , 1973, Stockner (1971) and Speir & Anderson (1974) estimated the biomass of the emerging adults / unit area/unit time. Such estimation of emergence rate in terms of biomass has not been made by odonatologists, who estimated the emergence by collecting exuviae.…”

Section: Discussionmentioning

confidence: 99%

Patterns of emergence, import of egg energy and energy export via emerging dragonfly populations in a tropical pond

Mathavan¹,

Pandian²

1977

Hydrobiologia

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IntroductionThe most abundant dragonflies Brachythemis contaminata, Orthetrurn sabina, Diplacodes trivialis, Pantalaflavescens and Trithemis festiva in the tropical pond Idumban emerged from November to April during the years 1973,1974 and 1975. The date of initiation of emergence of allthe species was synchronized and tied to the events following the north west monsoon in November. During the seasons '73-74 and '74-75, as many as 10,693 and 7,910 adults emerged; females outnumbered the males in all the 5 species; male populations of B. contaminate, 0. sabina, D. trivialis, P. flavescens and T. festiva represented 47, 48, 46, 49 and 44% during the '73-74 season, 48, 48, 46, 46 and 49% duringthe'74-75 season, respectively. The adult dragonflies equivalent to 2,442 Kcal emerged from the Pond during the season '73-74. Of this, B. contaminata contributed 30%, D. trivialis 7%, 0. sabina 12%, P. flavescens 23% and T. festiva 28%. For the season '74-75, the dragonflies equivalent to 1,602 Kcal emerged from the Pond and the contribution was in the following order: B. contaminata: 31%, 0. sabina: 8%, D. trivialis: 13%, P. flavescens: 27% and T. festiva: 21%. Import of energy due to inoculation of B. contarninata eggs into the Pond Idumban was 73 Kcal/year and the output from the Pond via emerging B. contaminata population alone amounted to 620 Kcal/year; the net energy loss from the Pond was 548 Kcal/year. During either season, as much as 99.7% of B. contaminata eggs failed to attain adulthood due to infertility (5.8%), unhatchability (12%) and predation during the egg and nymphal stages (82.5%). During the study, the GPP of the Pond was 26,073 Kcal/m 2 /year, and output of energy through emergence of 5 dragonfly species amounted to 0.0045 Kcal/m2/year, i.e. 0.00002% of the GPP is lost through the emerging carnivorous odonates; comparable values available for the emerging detritivorous chironomids, herbivorous dipterans and mayflies fall between .o and o. %. Dr. W. Junk b.v. Publishers -The Hague, The Netherlands

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Annual patterns of emergence of some Quebec stoneflies (Insecta: Plecoptera)

Cited by 46 publications

References 10 publications

Associations of aquatic insects (Ephemeroptera, Plecoptera, and Trichoptera) in a network of subarctic lakes and streams in Qu�bec

Associations of aquatic insects (Ephemeroptera, Plecoptera, and Trichoptera) in a network of subarctic lakes and streams in Qu�bec

Oberservations on the life histories and biology of Ephemeroptera and Plecoptera in northeastern Alberta

Patterns of emergence, import of egg energy and energy export via emerging dragonfly populations in a tropical pond

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