The larval stages of the Nematode Mermis nigrescens

Parasitology ◽  
1947 ◽  
Vol 38 (1-2) ◽  
pp. 10-16 ◽  
Author(s):  
H. A. Baylis
Keyword(s):  
Life History ◽  
Larval Development ◽  
Forficula Auricularia ◽  
Larval Stages ◽  
History Of

In a former paper (Baylis, 1944) an account was given of some observations on the life-history of Mermis nigrescens, and of its occurrence, naturally and experimentally, in earwigs (Forficula auricularia). As stated in that paper, the material then available did not seem to warrant an attempt to describe the larval development. Further material has now been obtained and studied, and it seems desirable to place on record some of the observations made, although many points still remain obscure.

Life history of Mytilocypris henricae (Chapman) (Crustacea: Ostracoda) in Lake Bathurst, New South Wales

1985 ◽  
Vol 36 (6) ◽  
pp. 807 ◽  
Author(s):  
K Martens ◽  
P Deckker ◽  
TG Marples
Keyword(s):  
Life History ◽  
Larval Development ◽  
Relative Abundance ◽  
New South ◽  
New South Wales ◽  
Life Stages ◽  
Larval Stages ◽  
South Wales ◽  
Short Period ◽  
History Of

The life history of the halobiont ostracod M. henricae was studied over a 2.5-year period in Lake Bathurst, a slightly saline lake in New South Wales. Samples were collected monthly or bimonthly between March 1981 and May 1982 and weekly between August 1982 and June 1983. Relative abundance of all nine life stages (eight larval stages and one adult stage) in the samples was determined. Furthermore, in 10 selected monthly samples, sex-ratio, relative abundance of three female maturity stages and number of eggs in uteri of ovigerous females were monitored. Nearly all life stages were present throughout the year and M. henricae is thus a perennial form in Lake Bathurst. Relative abundance of life stages suggests that M. henricae produces three successive generations per year. The spring generation, hatched from eggs laid during winter, matures around November-December. Its larval development takes between 4 and 5 months. The summer generation matures after a larval development of 2.5 months; this short period is ascribed to more favourable temperatures. The autumn generation takes about 4 months to mature.

THE LIFE HISTORY OF LESTES CONGENER (ODONATA: ZYGOPTERA) ON THE CANADIAN PRAIRIES

1974 ◽  
Vol 106 (4) ◽  
pp. 367-376 ◽  
Author(s):  
W. W. Sawchyn ◽  
C. Gillott
Keyword(s):  
Life History ◽  
Embryonic Development ◽  
Larval Development ◽  
Sexual Maturation ◽  
Low Temperatures ◽  
Canadian Prairies ◽  
History Of

AbstractLestes congener Hagen overwinters in the egg stage. There is a diapause just before blastokinesis, during which the egg is extremely resistant to low temperatures and desiccation. Post-diapause embryonic development can occur near 0 °C but will not take place until the eggs are wetted as the pond habitat fills in the spring. Hatching does not occur until the temperature exceeds about 5 °C and is highly synchronous. Larval development is rapid and is completed in the field in about 50 days. Emergence of the adults also is synchronous. Sexual maturation requires 3 weeks. Oviposition occurs immediately after copulation while the pair are still in tandem. It takes place only in dry stems of Scirpus. Adaptations of L. congener for life under rigorous prairie conditions are discussed.

The Euphausiidæ in the Neighbourhood of Plymouth. II. Nyctiphanes Couchii and Meganyctiphanes noruegica.

1925 ◽  
Vol 13 (4) ◽  
pp. 810-847 ◽  
Author(s):  
Marie V. Lebour
Keyword(s):  
Life History ◽  
Remaining Life ◽  
Larval Stages ◽  
History Of ◽  
Meganyctiphanes Norvegica

The present paper is a continuation of last year's work on the Euphausiidæ in the neighbourhood of Plymouth (Lebour, 1924), in which the early larval stages were described of Nyctiphanes Couchii, Meganyctiphanes norvegica and, less fully, those of Thysanoessa inermis and T. neglecta. These two last-named forms are reserved for a detailed description in another paper, only Nyctiphanes and Meganyctiphanes being dealt with here. The first paper described these as far as the last Calyptopis stages, and it was shown that they were much alike although perfectly distinct, especially as regards colour. The nauplii and metanauplii were easily distinguishable. The whole of the remaining life-history of Nyctiphanes Couchii has now been elucidated and also that of Meganyctiphanes norvegica, with the exception of a few late larval stages. The absence of these, however, does not materially affect our knowledge of its life-history.

scholarly journals The biology of Limacina retroversa

1954 ◽  
Vol 33 (2) ◽  
pp. 297-312 ◽  
Author(s):  
J. E. Morton
Keyword(s):  
Life History ◽  
Breeding Season ◽  
Detailed Account ◽  
Larval Stages ◽  
Large Numbers ◽  
History Of ◽  
Clione Limacina

The Plymouth Fauna List contains records of two genera of pteropods, Limacina and Clione. Of the first, Limacina retroversa (Flem.) is by far the better-known species, apparently occurring regularly at Plymouth in large numbers in townettings from outside, and sometimes inside, the Sound. It breeds at Plymouth from June to August, and Lebour (1932) has given a detailed account of its breeding and larval stages and has discussed its role in the plankton. The second species of Limacina at Plymouth is lesueuri (d'Orbigny), which has been observed from time to time since 1906, when it was very common. The last record in the Fauna is off the Breakwater in 1920. Of the gymnosomatous pteropods, Clione limacina Phipps is the only species regularly occurring. Lebour (1931) has described the life history of this form, and mentions February to August as its months of greatest abundance. Its breeding season is June to August. Another gymnosome, tentatively referred to as Clionina longicauda, is reported by Russell (1936), and from the specimen department at Plymouth Laboratory the writer obtained some preserved specimens, not easily identifiable, of a Pneumodermopsis taken locally; its species is perhaps ciliata, recorded by Massy (1917) from the Irish Coast.

The life-history and control of Hapatesus hirtus Candeze (Coleoptera: Elateridae) in Victoria

1991 ◽  
Vol 42 (5) ◽  
pp. 827 ◽  
Author(s):  
PA Horne ◽  
JA Horne
Keyword(s):  
Life History ◽  
Field Trials ◽  
Soil Samples ◽  
Control Measures ◽  
Potato Tubers ◽  
Larval Stages ◽  
Complete Development ◽  
History Of ◽  
And Control ◽  
Potato Crops

The incidence and life-history of potato wireworm, Hapatesus hirtus Candeze, in Victorian potato crops were studied, and insecticidal control measures assessed. Larval stages were present and active throughout the year. Ten larval instars were identified, probably requiring several years to complete development. Egg development occurred in October-November and the most likely timing of oviposition was December. The relative numbers of larval H. hirtus detected in soil samples, pre-planting baits and harvested tubers are presented. Baiting with halves of potatoes provided an efficient means of detecting areas likely to suffer wireworm damage. One formulation of chlorpyrifos ('Lorsban') was effective in reducing damage to, and larval numbers in, potatoes in field trials. The granular formulation of tefluthrin and the controlled release chlorpyrifos were not effective in protecting potato tubers.

The Life History of Olveria indica, an Amphistome Parasite from the Rumen of Indian Cattle

1961 ◽  
Vol 35 (S1) ◽  
pp. 179-186
Author(s):  
Gobind Singh Thapar
Keyword(s):  
Life History ◽  
Intermediate Host ◽  
Larval Development ◽  
History Of ◽  
Indian Cattle

The life history of Olveria indica was worked out experimentally at Lucknow. Gyraulus convexiusculus was shown to be the intermediate host. The various stages in the larval development are described in detail.

Life History of Epuraea (Haptoncus) ocularis Fairmaire, 1849 in Kolkata area, India and descriptions of the immature stages (Coleoptera: Nitidulidae: Epuraeinae)

Zootaxa ◽  
2021 ◽  
Vol 4970 (2) ◽  
pp. 303-312
Author(s):  
J. DASGUPTA ◽  
T. K. PAL
Keyword(s):  
Life History ◽  
Larval Development ◽  
Laboratory Condition ◽  
Immature Stages ◽  
Mature Larva ◽  
Sap Beetle ◽  
History Of ◽  
Pass Through

Sap beetle, Epuraea ocularis Fairmaire usually lays eggs and breeds on fermenting overripe fruits, and larvae pass through different instars before pupating on soil. In laboratory condition, mating pairs of adults copulated and females laid eggs in clusters; larva hatched out in 1 to 2 days, passed through four instars; mature larva migrated to soil for pupation. Larval development took about 12 to 17 days; and adult hatched out of pupa in about 4 to 5 days. Detailed morphology of egg, larva and pupa is presented herein, and significance of larva in taxonomy of beetles has been indicated. 

Life histories of six species of Leptoceridae (Insecta: Trichoptera) in Victoria

1993 ◽  
Vol 44 (2) ◽  
pp. 363 ◽  
Author(s):  
RM St.Clair
Keyword(s):  
Life History ◽  
Larval Development ◽  
Life Histories ◽  
Adult Emergence ◽  
Severe Drought ◽  
Emergence Period ◽  
University Life ◽  
History Of ◽  
Study Sites ◽  
Temporary River

Life history studies were carried out for populations of six species of Leptoceridae. Study sites were a permanent river (Acheron), a temporary river (Lerderderg) and a permanent lake (Monash University). Life histories varied in degree of synchrony of larval development, in length of adult emergence period, and from bi- to semivoltine. Oviposition requirements of adults were found to be the major factor influencing synchrony of the life history of one species. Life history features did not ameliorate the effects of the severe drought of 1982-83, nor did drought result in large changes in life histories.

On the life history of Synthesiomyia nudiseta van der Wulp (Diptera, Muscidae), a myiasis-producing fly

Parasitology ◽  
1942 ◽  
Vol 34 (3-4) ◽  
pp. 239-245 ◽  
Author(s):  
L. B. Siddons ◽  
D. N. Roy
Keyword(s):  
Life History ◽  
Present Communication ◽  
Interesting Fact ◽  
Larval Stages ◽  
Early Stages ◽  
History Of

Townsend (1935) has described the egg of Synthesiomyia nudiseta and recorded the interesting fact that the larva forms a cocoon. The larval stages and the puparium do not appear to have been described. That this species was not among the larvae of some unknown muscids described by Banks (1912) is evident from the figures of the-posterior spiracles. The present communication provides an account of all the early stages.

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