Odonaten‐Studien

Wesenberg-Lund, C.

doi:10.1002/iroh.19130060403

Cited by 11 publications

(9 citation statements)

References 17 publications

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“…At the ovipositing site, the male was nearly always rigidly upright, supported only by the thorax of the female, his legs pressed firmly against his thorax and his wings held tightly together. This position is the Agrion type described by Wesenberg-Lund ( 1913) and Buchholz ( 1950). However, all males occasionally bent over and rested briefly on the substratum.…”

mentioning

confidence: 59%

Demography and Behavior of the Damselfly, Argia Apicalis (Say), (Odonata: Coenagriidae)

Bick¹,

Bick²

1965

Ecology

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Demography, movement to and from water, reproductive behavior, behavior, localization, and spacing of single males were studies. All marked and unmarked individuals at water were counted on 47 consecutive days and hourly on three days. Simultaneous counts were tallied at pond and in a roosting area on nine days of varied weather. Behavior of 33 pairs, seven observed constantly from seizure until female left the pond, and of 17 unpaired males, each constantly observed for 30 min, is presented. Daily counts of matures and occurrence of tenerals throughout indicated a summer species and a population of diverse age. Mean minimum reproductive age for males were 8.4 days, for females 7.0 Maximum activity was near noon. Males were at water on 44% of their days lived, females on 20%. Repeat matings during the same day were very rate in both sexes. Males mated on 20% of their days at water, females on 89%. Because of this reciprocal relationship between frequency at water and frequency of mating, the mean total number of matings for both sexes was approximately equal. Movement from roosting area to pond was characterized by random shifting. Males arrived at water earlier than females and became spaced at six—foot intervals. Males recognized kind and sex and seized either flying or perched females immediately when they arrived without courtship or display by either sex. Copulation and oviposition were at sites other than those defended earlier in the day by the unpaired male. Copulation was a short distance away from the main concentration of single males and lasted 16 min. Ovipositing females were gregarious and single males tolerant of pairs, so that egg laying occurred at a few communal sites: willow roots, boards and sticks, horizontal Helenium. Egg laying consisted of three sequential phases: exploration (25 min), oviposition in tandem (65), oviposition alone (21). The male was the active partner in seizure and copulation, the female in oviposition. Most females avoided a second seizure during the same day by rapid escape flight if captured a second time, copulation of oviposition was unsuccessful. A particular male was not associated with a particular six—foot interval from day to day, but in any one day, most males remained within the same interval for 76% of their total time at water. They maintained these areas by aggressive activity which was in no way sexual and which warded off 87% of all intruders. Most important were strong flights toward intruders without physical contact and patrols of an area.

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mentioning

confidence: 59%

Demography and Behavior of the Damselfly, Argia Apicalis (Say), (Odonata: Coenagriidae)

Bick¹,

Bick²

1965

Ecology

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“…Adults are usually found from mid-May to mid-August (e.g. Wesenberg-Lund, 1913;Parr, 1970;Scheffler. 1970;Hammond, 1977), exceptionally from the end of April to the end of September (Longfietd, 1949;Schiemenz, 1953).…”

Section: Introductionmentioning

confidence: 99%

Embryonic development, larval growth and life cycle of Coenagrion puella (Odonata: Zygoptera) from an Austrian pond

Waringer

Humpesch

1984

Freshwater Biology

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1. Newly-laid eggs of Coenagrion puella (L.) from a pond near Herzogenburg (Lower Austria) were kept at constant water temperatures (range C.3.5X to c.28°C) in the laboratory. Hatching success varied with temperature; no eggs hatched below IT'C and nearly all hatched at c.l6°C. Hatching time decreased with increasing temperature and the relationship between the two variables within the range 12-28°C was well described by a power law. The length of the hatching period was less than 12 days. Hatching times estimated from the power-law equations and those obtained in the field experiments were similar. Therefore both the hatching time and the length ofthe hatching period in the field could be estimated from the laboratory data for the range 12-28°C.2. The maximum number of instars from egg to imago was 11; the average body length increment (mm) per moult was proportionately constant at c.26% and Dyar's rule was applicable. The interval between moults decreased with increasing temperature up to the seventh instar and the relationship between the two variables within the range 12-28°C was well described by a power law. The moulting interval for instars 8-11 ranged from 23 to 48 days and was relatively independent of temperature. No moulting occurred at temperatures below 12°C.3. Larval growth was logistic in the laboratory and variations in mean logistic growth rate (range 0-2.5% length day"') were related to mean temperature with no growth at temperatures < 12°C. Larval growth rates in pond experiments were similar to those estimated from laboratory data, and therefore the regression equations obtained from the laboratory experiments are probably applicable to larval growth in the field. 4. Information on the life cycle of C. puella is briefly reviewed and it is concluded that C. puella from the pond near Herzogenburg has an univoltine life cycle.

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“…8 All larvae were taken between March 8 and 14, and we are unsure if verticalis winters in the final instar. G. Eller and Jenner; it has a 2-year life cycle in this region, spending the first winter in the egg, as do some other species of Aeshna which have been studied (Wesenberg-Lund 1913). For example, Amphiagrion saucium and Chromagrion conditum, taken with I. verticalis, molted only after a minimum of 5 days in the laboratory.…”

Section: Acknowledgmentsmentioning

confidence: 96%

“…More extensive information about this species is being gathered by ]. G. Eller and Jenner; it has a 2-year life cycle in this region, spending the first winter in the egg, as do some other species of Aeshna which have been studied (Wesenberg-Lund 1913). 17 The taking of only final larvae indicates a univoltine life cycle, but additional material would be of value to substantiate this, as the very closely related (possibly conspecific) G. cavillaris is semivoltine in Florida (Paulson 1966).…”

Section: Acknowledgmentsmentioning

confidence: 97%

Population Structure in Overwintering Larval Odonata in North Carolina in Relation to Adult Flight Season

Paulson¹,

Jenner²

1971

Ecology

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The hypothesis that North Temperate Odonata can be categorized into "spring'' or "summer" species by the predominant overwintering instars and the position and duration of the adult flight season was tested for 55 species in North Carolina. Over 3,000 larvae of these species, collected at a time of stable instar distribution (winter), were examined and the population structure determined for each species. The composition of the wintering populations varied from a single instar to (probably) the entire spread of instars known for the species. The peak occurred in any one of the last four instars, depending upon the species. The spring vs. summer species classification is valid at high latitudes but breaks down at the latitude of North Carolina, where there is a continuum of variance from one type of life history to another. 1

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Odonaten‐Studien

Cited by 11 publications

References 17 publications

Demography and Behavior of the Damselfly, Argia Apicalis (Say), (Odonata: Coenagriidae)

Demography and Behavior of the Damselfly, Argia Apicalis (Say), (Odonata: Coenagriidae)

Embryonic development, larval growth and life cycle of Coenagrion puella (Odonata: Zygoptera) from an Austrian pond

Population Structure in Overwintering Larval Odonata in North Carolina in Relation to Adult Flight Season

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