Evidence of sexual attraction by pheromone in the cedar web-spinning sawfly

2007 ◽  
Vol 139 (5) ◽  
pp. 713-721 ◽  
Author(s):  
Nabil Nemer ◽  
Nasri S. Kawar ◽  
Linda Kfoury ◽  
Brigitte Frerot
Keyword(s):  
Sex Pheromone ◽  
Laboratory Tests ◽  
Field Experiments ◽  
Sexual Attraction ◽  
Body Parts ◽  
Pheromone Production ◽  
Male Response ◽  
Male And Female ◽  
Males And Females ◽  
Dose Dependent

AbstractThe cedar web-spinning sawfly, Cephalcia tannourinensis Chevin (Hymenoptera: Pamphiliidae), is a pest that has been causing serious damage to cedar (Cedrus libani) forests in Lebanon since 1990. The existence of a sex pheromone was shown in field experiments in a cedar forest in Lebanon and in laboratory tests in olfactometers with and without airflow. More males were caught in traps baited either with virgin females or with a hexane extract of the whole female body than in traps baited either with males alone or with mixed males and females. Male and female C. tannourinensis were active during the day. Mating and pheromone production were observed to occur during midday hours (1000–1400) in the field and under laboratory conditions. Olfactometer tests with extracts prepared from different body parts of the female indicated that the pheromone is produced in the abdominal region, and tests with different dilutions of female extract showed that the male response is dose-dependent.

Evidence for a Sex Attractant in Agriotes lineatus (L.) (Col. Elateridae) Demonstrated by Field Experiments

1973 ◽  
Vol 4 (1) ◽  
pp. 78-80 ◽  
Author(s):  
Åke Borg
Keyword(s):  
Sex Pheromone ◽  
Ethyl Alcohol ◽  
Field Experiments ◽  
Sex Attractant ◽  
Pitfall Traps ◽  
Males And Females ◽  
Agriotes Lineatus

AbstractElaterids of the species Agriotes lineatus (L.), which were collected in heap-traps (at Stenum, Skara, West Sweden) during the period May 9-24, I972, were sorted according to sex. The abdomens of the males and females respectively were crushed in 95 % ethyl alcohol for the extraction of possible pheromones. The unfiltered fluid was tested in pitfall traps placed in a field of oats. During the period May II - July 3, I70 A. lineartus were obtained of which I62 were males. The majority of these were caught in the traps baited with female extract. The male extract caused no response. The female extract must therefore have contained a sex pheromone which attracted males of the same species.

scholarly journals a comparative analysis of canthal index of ekowe indigenes, bayelsa state

2021 ◽  
pp. 157-159
Author(s):  
Timipa Richard Ogoun ◽  
Tobia P.S S ◽  
Aye T T
Keyword(s):  
Health Care ◽  
Mean Value ◽  
Normative Values ◽  
Body Parts ◽  
Male And Female ◽  
Care Givers ◽  
Significant Difference ◽  
Males And Females ◽  
The Mean ◽  
Predictive Study

Human body parts are useful in the predictive study of the unknown. The aim of this study is to know the normative values of the canthi of the Ekowe people. Measurements such as inner and outer canthal distances were carried out. The mean value of the innercanthal distance for males and females are 3.55±0.58 and 3.43±0.52. The mean outer canthal distance for male and female is 13.91±0.84 and 13.62±0.76. The canthal index for male and female is 25.59±4.54 and 25.30±4.03. Sexual dimorphism exists and statistical significant difference was noticed in the outer canthal distance between the males and females (P˂0.05). This study has provided us with normative reference values of inner and outer canthal distances and canthal index for the Ekowe Population which is import to the health care givers, Anatomist, ophthalmic industry and anthropologist

A SEX PHEROMONE IN THE INSECT RHODNIUS PROLIXUS (HEMIPTERA: REDUVIIDAE)

1971 ◽  
Vol 103 (1) ◽  
pp. 18-22 ◽  
Author(s):  
W. F. Baldwin ◽  
A. G. Knight ◽  
K. R. Lynn
Keyword(s):  
Sex Pheromone ◽  
Blood Meal ◽  
Rhodnius Prolixus ◽  
Volatile Substance ◽  
Pheromone Production ◽  
Complete Darkness ◽  
Actual Contact ◽  
Nocturnal Species ◽  
Males And Females ◽  
Meal Feeding

AbstractIn Rhodnius, a volatile substance produced by mating pairs is attractive to male insects. The pheromone acts also as a sexual stimulant; males respond in the absence of females by attempting copulation with other males. Air swept over mating pairs and conducted to a cage at a considerable distance proved to be highly attractive to males. Proximity of the sexes, without opportunity for actual contact, does not stimulate production of the pheromone. Since males and females will copulate only after a blood meal, feeding is a prerequisite to pheromone production. Also, unfed males will not respond to the attractant. Males of this nocturnal species were stimulated only in complete darkness.

Olfactory activity of ethyl (E,Z)-2,4-decadienoate on adult oriental fruit moths

2010 ◽  
Vol 142 (5) ◽  
pp. 481-488 ◽  
Author(s):  
Fabio Molinari ◽  
Gianfranco Anfora ◽  
Silvia Schmidt ◽  
Michela Villa ◽  
Claudio Ioriatti ◽  
...  
Keyword(s):  
Host Plants ◽  
Prunus Persica ◽  
Response Curves ◽  
Male And Female ◽  
Cydia Molesta ◽  
Pear Ester ◽  
Males And Females ◽  
Secondary Host Plants ◽  
Dose Dependent ◽  
Laboratory Bioassays

AbstractWe investigated whether or not pear ester (ethyl (E,Z)-2,4-decadienoate) attracted adult oriental fruit moths, Cydia molesta (Busck) (Lepidoptera: Tortricidae). The electroantennographic responses of C. molesta to pear ester were recorded and dose–response curves calculated. In laboratory bioassays, the attractiveness of different dosages was assessed in a dual-choice olfactometric arena. The responses of virgin males and females to pear ester in the presence and absence of pear (Pyrus communis L.), peach (Prunus persica (L.) Batsch.), and apple (Malus ×domestica Borkh.) (Rosaceae) shoots were evaluated. Electroantennographic recordings demonstrated that both male and female C. molesta were able to detect the pear ester. In our bioassay, however, pear ester readily attracted males but attracted very few females. The response of males was dose-dependent and they preferred pear ester over apple- and pear-shoot volatiles, whereas no apparent preference between pear ester and peach-shoot volatiles was observed. Therefore, this kairomonal compound could be more effective in attracting C. molesta when applied in orchards of secondary host plants, like apple or pear, than in peach orchards.

Stronger at the Broken Places

2018 ◽  
Author(s):  
Stephanie M. Langin-Hooper
Keyword(s):  
Subject Matter ◽  
Side Effect ◽  
Sexual Attraction ◽  
Cross Cultural ◽  
Body Parts ◽  
User Interest ◽  
Male And Female ◽  
Cultural Dialogue

Hellenistic Babylonian figurines with separately made and attached limbs are not a uniform corpus in terms of their iconography or subject matter, but all leave similar visual traces of fragmentation on an otherwise complete miniature body. Rather than interpreting these visual “breaks” as simply an unfortunate side effect of these figurines’ manufacture, the chapter argues that the appearance of broken places actually enriched these objects’ affect by fixating and intensifying user interest on otherwise overlooked body parts. Strikingly, the artificial poses and hyper-real actions of fragmented figurine limbs all operated in the liminal zones of cultural contestation between Greeks and Babylonians: banqueting, childhood, male and female nudity, and sexual attraction. By depicting some of these most difficult points of cross-cultural contention in the miniature scale (where they were less threatening) and in fragmented form (where they were visually interesting), such figurines offered avenues into cross-cultural dialogue and communication.

Some factors affecting sexual attraction in Ascaris suum (Nematoda)

1985 ◽  
Vol 63 (9) ◽  
pp. 2074-2076 ◽  
Author(s):  
L. García-Rejón ◽  
S. Verdejo ◽  
M. Sanchez-Moreno ◽  
M. Monteoliva
Keyword(s):  
Sexual Attraction ◽  
Ascaris Suum ◽  
Migratory Response ◽  
Male And Female ◽  
Factors Affecting ◽  
Sexual Pheromones ◽  
Males And Females

The response of male and female Ascaris suum to sexual attractant was affected by the number of pheromone-emitting worms and the pH of the medium. The optimum migratory response of both sexes was obtained when three individuals were used as emitting worms. Males and females showed statistically significant responses to sexual pheromones at pH 7.4 whereas they did not respond at pH 5.5 or 9.0.

Short-Term Toxicity (1 and 10 Days) of Cadmium Chloride in Male and Female Rats: Gavage and Drinking Water

1989 ◽  
Vol 8 (2) ◽  
pp. 377-404 ◽  
Author(s):  
Joseph F. Borzelleca ◽  
Elizabeth C. Clarke ◽  
L. W. Condie
Keyword(s):  
Drinking Water ◽  
Body Weight ◽  
Weight Gain ◽  
Body Weight Gain ◽  
Female Rats ◽  
Testicular Atrophy ◽  
Dependent Manner ◽  
Male And Female ◽  
Males And Females ◽  
Dose Dependent

Male and female Sprague-Dawley-derived rats received CdCl2 by gavage at doses of 25, 51, 107, and 225 mg CdCl2 per kg body weight per day for 1 or 10 consecutive days or in drinking solutions at concentrations of 13–323 mg CdCl2 per liter for 10 consecutive days. There were appropriate controls. In the 1 day study in males only, an apparent treatment-related but not statistically significant decrease in body weight was reported; spleen weights and ratios were significantly lower and lung weights and ratios were significantly higher (in the highest dose only). Dose-dependent mortality was observed in the 10 day gavage study. Body weight gain was depressed in a dose-dependent manner in both males and females. Weights and/or ratios of brain, liver, spleen, lungs, thymus, kidneys, and testes of treated males were depressed in a dose-dependent manner. In females, weights and/or ratios of liver, spleen, thymus, and kidneys were depressed in a dose-dependent manner. Focal necrotic changes in renal tubular epithelium and tubular degeneration were reported in males and females. Testicular and hepatic histopathologic changes (testicular atrophy and necrosis and hepatic necrosis) were also reported in males. In the drinking water study, males demonstrated dose-dependent decreases in body weight gain and weight and/or ratios of liver, spleen, thymus, and kidneys. There were no significant compound-related effects in females, although liver weights and ratios were lower. There were no compound-related histopathologic effects.

Diel periodicity of sexual communication in Anarsia lineatella (Lepidoptera: Gelechiidae)

2006 ◽  
Vol 138 (3) ◽  
pp. 384-389 ◽  
Author(s):  
Kristine K. Schlamp ◽  
Kendra Brown ◽  
Regine Gries ◽  
Melanie Hart ◽  
Gerhard Gries ◽  
...  
Keyword(s):  
Sex Pheromone ◽  
Laboratory Experiments ◽  
Field Experiments ◽  
Sexual Communication ◽  
Diel Periodicity ◽  
Pheromone Production ◽  
Standard Time ◽  
Anarsia Lineatella ◽  
Synthetic Sex Pheromone ◽  
Pheromone Glands

AbstractThe sex pheromone of the peach twig borer, Anarsia lineatella (Zeller), was identified 30 years ago but the communication biology of this species has hardly been studied. In laboratory experiments, female moths kept at a photoperiod of 16L:8D (20 ± 2 °C, 70% ± 5% relative humidity) emitted pheromone before, during, and after sunrise (0400–0600 Pacific standard time), whereas pheromone was present in pheromone glands at similar quantities throughout the 24 h recording period. These data suggest that pheromone production and emission are not closely linked. In field experiments during July 2001 near Livingston, California (CA), and during June 2002 near Keremeos, British Columbia (BC), males were attracted to traps baited with synthetic sex pheromone (CA) or conspecific females (BC) only between 0300 and 0600 (Pacific standard time), suggesting overlap between periods of pheromone emission by females and attraction response by males. Groups of females in the presence of conspecific males, which were physically separated from females, emitted less sex pheromone than groups of females in the absence of males, suggesting that males communicate their presence to females and females change their behaviour in response.

EFFECT OF NICOTINE ON SEXUAL BEHAVIOUR OF MUTANT STRAIN (CURLED) OF DROSOPHILLA MELANOGASTER

2018 ◽  
Vol 24 (1) ◽  
Author(s):  
SHAMIM AKHTER CHOUDHARY
Keyword(s):  
Mutant Strain ◽  
Sexual Behaviour ◽  
Virgin Female ◽  
P Value ◽  
Pooled Data ◽  
Mating Latency ◽  
Males And Females ◽  
Food Medium ◽  
Food Media ◽  
Dose Dependent

In the present study, an attempt was made to study the effect of plant extract on Sexual behaviour of Mutant Strain (Curled) of Drosophila melanogaster. The LC50 has been estimated with 1% of the food media. The virgin females and males were isolated and fed with normal food media for three days. Then sub-lethal concentrations of 0.625 μl / 100 ml food, 1.2 μl /100 ml food, 2.5μl /100 / food of nicotine were mixed in food medium and allowed in flies to feed for two days. Then appropriate combination of untreated / treated males and females were introduced into the mating chamber. Courtship latency, mating latency and copulation duration were studied. After observation of the behaviour, mated flies were allowed to produce progeny. The sexual behaviour of bachelor male and virgin female obtained in the progeny was also studied. The pooled data were analyzed by student t-test and the result indicates p-value significant at 0.05 levels. The courtship latency was affected by in treatment but it is neither dose dependent nor sex dependent.

GONADOTROPHIN PATTERNS IN MALE AND FEMALE RATS:

1968 ◽  
Vol 58 (4) ◽  
pp. 600-612 ◽  
Author(s):  
Robert Boyd ◽  
Donald C. Johnson
Keyword(s):  
Ascorbic Acid ◽  
Testosterone Propionate ◽  
Female Rats ◽  
Female Rat ◽  
Feedback Effects ◽  
Male And Female ◽  
Prostate Weight ◽  
Male And Female Rats ◽  
Males And Females ◽  
Normal Males

ABSTRACT The effects of various doses of testosterone propionate (TP) upon the release of luteinizing hormone (LH or ICSH) from the hypophysis of a gonadectomized male or female rat were compared. Prostate weight in hypophysectomized male parabiotic partners was used to evaluate the quantity of circulating LH. Hypophyseal LH was measured by the ovarian ascorbic acid depletion method. Males castrated when 45 days old secreted significantly more LH and had three times the amount of pituitary LH as ovariectomized females. Administration of 25 μg TP daily reduced the amount of LH in the plasma, and increased the amount in the pituitary gland, in both sexes. Treatment with 50 μg caused a further reduction in plasma LH in males, but not in females, while pituitary levels in both were equal to that of their respective controls. LH fell to the same low level in partners of males or females receiving 100 μg TP. When gonadectomized at 39 days, males and females had the same amount of plasma LH, but males had more stored hormone. Pituitary levels were unchanged from controls following treatment with 12.5, 25 or 50 μg TP daily, but plasma values dropped an equal amount in both sexes with the latter two doses. Androgenized males or females, gonadectomized when 39 days old, were very sensitive to the effects of TP and plasma LH was significantly reduced with 12.5 μg daily. Pituitary LH in androgenized males was higher than that of normal males but was reduced to normal by small amounts of TP. The amount of stored LH in androgenized females was not different from that of normal females and it was unchanged by any dose of TP tested. Results are consistent with the conclusion that the male hypothalamic-hypophyseal axis is at least as sensitive as the female axis to the negative feedback effects of TP. Androgenization increases the sensitivity to TP in both males and females.

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