Mate location and courtship - finding suitable mates.

Author(s):  
Roger L. H. Dennis
Keyword(s):  
2005 ◽  
Vol 19 (6) ◽  
pp. 1017-1024 ◽  
Author(s):  
R. SHINE ◽  
J. K. WEBB ◽  
A. LANE ◽  
R. T. MASON
Keyword(s):  

2018 ◽  
Vol 10 (9) ◽  
pp. 12203
Author(s):  
Nilesh R. Thaokar ◽  
Payal R. Verma ◽  
Raymond J. Andrew

The Coromandel Damselfly Ceriagrion coromandelianum can be easily identified because of its bright yellow abdomen, greenish thorax and eyes.  In females, the abdomen is darker with light brown colouration extending to dark brown towards the terminal end.  The documentation of the reproductive behaviour of Ceriagrion coromandelianum was carried out at the botanical garden of Hislop College, Nagpur, India.  The males of C. coromandelianum arrive early in the morning by 07:00hr at the ovipositing site.  They belong to “sit and wait” type of mate-location.  While perched and waiting for the female to arrive they at times exhibit abdominal bobbing, and oviposition posture.  The territorial area of male C. coromandelianum is very small, within a range of about 45cm around his perch.  There is no precopulatory courtship display and the male move toward the arriving receptive female and directly tries to form a tandem link.  The other males of the group follow the pair.  The tandem pair flies towards the safety of the surrounding vegetation to copulate. Before copulation, the male fills his penis vesicle with sperm material by the process of “intra male sperm translocation” which lasts for 30±8 seconds.  The female curves her abdomen ventrally forward so that her gonopore which is located between the eighth and ninth sternite comes to lie before the secondary copulatory apparatus of the male and forms a strong genital link, to form the copulatory wheel.  The copulation duration can be long (34–55 min) or short (12–15 min).  Two stages of copulation depending upon the pumping movement of the couple can be differentiated.  During the first stage, the male rhythmically and forcefully depresses and stretches the first two abdominal segments, vigorously pumping the penis inside the female vagina which accounts for 72% of the copulation duration.  The second stage starts with rapid short thrusting movement which are not forceful but exhibit shallow movements of the first two abdominal segment of the male.  The tandem pairs after copulation may directly move for oviposition or settle around the surrounding foliage and exhibit “post-copulatory resting” (PCR) behaviour.  It is noted that 23.3% females immediately commence oviposition, 53.4% exhibit brief, while 23.3% display prolonged PCR behaviour.  


Author(s):  
Yu Pan ◽  
Xinxin Zhang ◽  
Zhun Wang ◽  
Lizhong Qi ◽  
Xinsheng Zhang ◽  
...  

Abstract The rice water weevil, Lissorhoptrus oryzophilus Kuschel (Coleoptera: Curculionidae), is a destructive pest that causes damage to rice crops worldwide. The olfactory system is critical for host or mate location by weevils, but only limited information about the molecular mechanism of olfaction-related behaviour has been reported in this insect. In this study, we conducted SMRT-seq transcriptome analysis and obtained 54,378 transcripts, 38,706 of which were annotated. Based on these annotations, we identified 40 candidate chemosensory genes, including 31 odorant-binding proteins (OBPs), six chemosensory proteins (CSPs) and three sensory neuron membrane proteins (SNMPs). Phylogenetic analysis showed that LoryOBPs, LoryCSPs and LorySNMPs were distributed in various clades. The results of tissue expression patterns indicated that LoryOBPs were highly abundant in the antennae, whereas LoryCSPs were highly abundant not only in the antennae but also in the abdomen, head and wings. Our findings substantially expand the gene database of L. oryzophilus and may serve as a basis for identifying novel targets to disrupt key olfactory genes, potentially providing an eco-friendly strategy to control this pest in the future.


2019 ◽  
Vol 158 ◽  
pp. 183-191 ◽  
Author(s):  
Eliza K. Thompson ◽  
Naomi L. Cullinan ◽  
Therésa M. Jones ◽  
Gareth R. Hopkins

2009 ◽  
Vol 51 (3) ◽  
pp. 337-340 ◽  
Author(s):  
Takehiko Yamanaka ◽  
Andrew M. Liebhold
Keyword(s):  

2005 ◽  
Vol 31 (6) ◽  
pp. 1443-1444 ◽  
Author(s):  
Matthew D. Ginzel ◽  
Gary J. Blomquist ◽  
Jocelyn G. Millar ◽  
Lawrence M. Hanks

Insects ◽  
2020 ◽  
Vol 11 (2) ◽  
pp. 109
Author(s):  
Mokhtar Abdulsattar Arif ◽  
Salvatore Guarino ◽  
Stefano Colazza ◽  
Ezio Peri

The pentatomid bug Bagrada hilaris is a key pest of brassicaceous crops in several areas of the world. Previous studies suggest that mate location of this species is mediated by volatile chemicals produced by males, among which the main compound is (E)-2-octenyl acetate. However, the possible attraction of males, females, and nymphs to this compound has not yet been specifically tested. In this study, we tested the response of B. hilaris females, males, and nymphs to (E)-2-octenyl acetate using an electroantennogram (EAG) and olfactometer in the presence or absence of a host plant. Moreover, (E)-2-octenyl acetate as an attractant lure in field trap bioassays was evaluated. EAG recordings showed that this compound evokes antennal responses in B. hilaris females. Olfactometer behavioral responses showed that females and nymphs were attracted to (E)-2-octenyl acetate, while males showed no attraction. In the field trap bioassays, captures were obtained in traps baited with 5 and 10 mg of (E)-2-octenyl acetate, while in traps loaded with 2 mg and control traps, there were no recorded catches. These results suggest the involvement of (E)-2-octenyl acetate in intraspecific interactions of this species.


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