Asymmetric species specificity in reponses to female sexual pheromone by males of two species of Trichogaster (Pisces: Belontiidae)

1987 ◽  
Vol 65 (5) ◽  
pp. 1129-1134 ◽  
Author(s):  
Jeff S. McKinnon ◽  
N. Robin Liley
Keyword(s):  
Southeast Asia ◽  
Chemical Cues ◽  
Chemical Signals ◽  
Species Specificity ◽  
Plain Water ◽  
Chemical Signal ◽  
Congeneric Species ◽  
Sexual Pheromone ◽  
Male Response ◽  
Signal Functions

We examined the species specificity of the responses to female pheromones by males of Trichogaster trichopterus, the blue gourami, and Trichogaster pectoralis, the snakeskin gourami, sympatric belontiids from Southeast Asia. Using only chemical signals, males of both species discriminated between ripe females and nonripe females, suggesting that the female chemical signal functions in reproduction. Trichogaster trichopterus males also discriminated between and nonripe females and plain water. Two different experimental procedures showed that male T. pectoralis discriminated between chemical cues from conspecific and heterospecific females while male T. trichopterus did not. This asymmetric specificity of male response is consistent with the ecological histories of the experimental stocks. Trichogaster trichopterus used in these experiments came from a population historically isolated from congeneric species, while T. pectoralis came from a population originally sympatic with three congeners.

The shadow of the shell: a cue for a new home

2019 ◽  
Vol 99 (5) ◽  
pp. 1165-1169 ◽  
Author(s):  
Monserrat Suárez-Rodríguez ◽  
Karla Kruesi ◽  
Guillermina Alcaraz
Keyword(s):  
Visual Perception ◽  
Hermit Crab ◽  
Chemical Cues ◽  
Visual Stimuli ◽  
Chemical Signals ◽  
Hermit Crabs ◽  
The Real ◽  
Chemical Stimuli ◽  
Source Of Information ◽  
Intertidal Environments

AbstractHermit crabs use different senses to search for and find shells. In most cases, chemical cues have been proven to act as a very efficient way of finding new shells. However, in intertidal environments, the water transports chemical signals in different directions and velocities may make it harder to track the source of the cue, so visual stimuli may be a more precise source of information. The hermit crab Calcinus californiensis shows a preference for the biconical shells of Stramonita biserialis, although the crabs may also use the less preferred shell of Nerita scabricosta. We were interested in exploring if C. californiensis identify the preferred shell species through vision in the absence of chemical stimuli. We presented both shell species to hermit crabs in two different sets of experiments. In one experiment, we presented to the hermit crabs real shells of N. scabricosta and S. biserialis, and in another, we presented only the silhouettes of the same shells. The hermit crabs discriminated between the real shells and the silhouettes of N. scabricosta and S. biserialis. Females attended with higher frequency to real shells and silhouettes of S. biserialis; while males attended more to shells and silhouettes of N. scabricosta. Although, larger males biased their attendance toward shells of S. biserialis. Our results show that visual perception may be more important than we have thought in intertidal animals.

scholarly journals A sharp-edge-based acoustofluidic chemical signal generator

Lab on a Chip ◽  
2018 ◽  
Vol 18 (10) ◽  
pp. 1411-1421 ◽  
Author(s):  
Po-Hsun Huang ◽  
Chung Yu Chan ◽  
Peng Li ◽  
Yuqi Wang ◽  
Nitesh Nama ◽  
...  
Keyword(s):  
Cell Signaling ◽  
Chemical Signals ◽  
Signal Generator ◽  
Sharp Edge ◽  
Chemical Signal ◽  
Chemical Signal Generator ◽  
Edge Based

A sharp-edge-based acoustofluidic device capable of generating temporally controllable chemical signals is presented to enable cell-signaling studies.

scholarly journals Genetic mapping of male pheromone response in the European corn borer identifies candidate genes regulating neurogenesis

2016 ◽  
Vol 113 (42) ◽  
pp. E6401-E6408 ◽  
Author(s):  
Fotini A. Koutroumpa ◽  
Astrid T. Groot ◽  
Teun Dekker ◽  
David G. Heckel
Keyword(s):  
Reproductive Isolation ◽  
European Corn Borer ◽  
Odorant Receptors ◽  
Volatile Components ◽  
Pheromone Response ◽  
Male Pheromone ◽  
Sexual Pheromone ◽  
Corn Borer ◽  
Male Response ◽  
Female Pheromone

The sexual pheromone communication system of moths is a model system for studies of the evolution of reproductive isolation. Females emit a blend of volatile components that males detect at a distance. Species differences in female pheromone composition and male response directly reinforce reproductive isolation in nature, because even slight variations in the species-specific pheromone blend are usually rejected by the male. The mechanisms by which a new pheromone signal–response system could evolve are enigmatic, because any deviation from the optimally attractive blend should be selected against. Here we investigate the genetic mechanisms enabling a switch in male response. We used a quantitative trait locus-mapping approach to identify the genetic basis of male response in the two pheromone races of the European corn borer, Ostrinia nubilalis. Male response to a 99:1 vs. a 3:97 ratio of the E and Z isomers of the female pheromone is governed by a single, sex-linked locus. We found that the chromosomal region most tightly linked to this locus contains genes involved in neurogenesis but, in accordance with an earlier study, does not contain the odorant receptors expressed in the male antenna that detect the pheromone. This finding implies that differences in the development of neuronal pathways conveying information from the antenna, not differences in pheromone detection by the odorant receptors, are primarily responsible for the behavioral response differences among the males in this system. Comparison with other moth species reveals a previously unexplored mechanism by which male pheromone response can change in evolution.

scholarly journals The importance of antennae for pea aphid wing induction in the presence of natural enemies

2005 ◽  
Vol 95 (2) ◽  
pp. 125-131 ◽  
Author(s):  
G. Kunert ◽  
W.W. Weisser
Keyword(s):  
Natural Enemies ◽  
Chemical Cues ◽  
Acyrthosiphon Pisum ◽  
Chemical Signals ◽  
Pea Aphid ◽  
Visual Signals ◽  
Wing Formation ◽  
Tactile Stimuli ◽  
Pea Aphids ◽  
General Response

AbstractThe pea aphidAcyrthosiphon pisumHarris has been shown to produce an increasing proportion of winged morphs among its offspring when exposed to natural enemies, in particular hoverfly larvae, lacewing larvae, adult and larval ladybirds and aphidiid parasitoids. While these results suggest that wing induction in the presence of predators and parasitoids is a general response of the pea aphid, the cues and mechanisms underlying this response are still unclear. Tactile stimuli and the perception of chemical signals as well as visual signals are candidates for suitable cues in the presence of natural enemies. In this paper the hypothesis that the aphids' antennae are crucial for the wing induction in the presence of natural enemies is tested. Antennae of pea aphids were ablated and morph production was scored when aphids were reared either in the presence or the absence of predatory lacewing larvae over a six-day period. Ablation of antennae resulted in a drastic drop in the proportion of winged morphs among the offspring, both in the presence and the absence of a predator whereas predator presence increased wing induction in aphids with intact antennae, as reported in previous experiments. The results show that antennae are necessary for wing induction in the presence of natural enemies. Critical re-examination of early work on the importance of aphid antennae and tactile stimuli for wing induction suggests that a combination of tactile and chemical cues is likely to be involved not only in predator-induced wing formation but also for wing induction in response to factors such as crowding in the aphid colony.

The identity of Ailanthus guangxiensis (Simaroubaceae) and lectotypification of A. integrifolia Lamarck

Phytotaxa ◽  
2014 ◽  
Vol 173 (2) ◽  
pp. 177 ◽  
Author(s):  
Zhuqiu Song ◽  
Dongxian Xu
Keyword(s):  
Local Government ◽  
Southeast Asia ◽  
Endemic Species ◽  
The Other ◽  
Wild Plant ◽  
Congeneric Species ◽  
Northern Australia ◽  
Guangxi Province ◽  
South And Southeast Asia ◽  
The Family

The genus Ailanthus Desfontaines (1788: 265) of the family Simaroubaceae comprises 5–10 species distributed in South and Southeast Asia as well as northern Australia (Nooteboom 1962, Peng & Thomas 2008). The species can be classified into two groups, i.e., one with toothed leaflets and the other with entire-margined leaflets. The latter group currently includes five species, A. triphysa (Dennstedt 1818: 32) Alston (1931: 41), A. vietnamensis H.V.Sam & Nooteboom (2007: 555), A. fordii Nooteboom (1962: 220), A. integrifolia Lamarck (1792: 417), and A. guangxiensis S.L.Mo ex C.F.Liang & S.L.Mo (1982: 145). The last species was described based on two fruit collections from Longzhou County, Guangxi Province, China. In the protologue, the authors stated that it was clearly distinguished from its congeneric species by the large samaras. After that, A. guangxiensis is always considered as an endemic species of Guangxi (Peng & Thomas 2008, Qin & Liu 2010, Mo 2011). In 2010, it was listed as a key protected wild plant of Guangxi by the local government.

scholarly journals The use of chemical and visual cues in female choice in the butterfly Bicyclus anynana

2007 ◽  
Vol 274 (1611) ◽  
pp. 845-851 ◽  
Author(s):  
Katie Costanzo ◽  
Antónia Monteiro
Keyword(s):  
Female Choice ◽  
Visual Cues ◽  
Chemical Cues ◽  
Chemical Signals ◽  
Relative Importance ◽  
Bicyclus Anynana ◽  
Closely Related Species ◽  
Multiple Cues ◽  
The Past ◽  
Close Range

Investigating the relative importance of multiple cues for mate choice within a species may highlight possible mechanisms that led to the diversification of closely related species in the past. Here, we investigate the importance of close-range pheromones produced by male Bicyclus anynana butterflies and determine the relative importance of these chemical cues versus visual cues in sexual selection by female choice. We first blocked putative androconial organs on the fore- and hindwings of males, while also manipulating the ability of females to perceive chemical signals via their antenna. We found that male chemical signals were emitted by both fore- and hindwing pairs and that they play an important role in female choice. We subsequently tested the relative importance of these chemical cues versus visual cues, previously identified for this species, and found that they play an equally important role in female choice in our laboratory setting. In addition, females will mate with males with only one signal present and blocking both androconial organs on males seems to interfere with male to male recognition. We discuss the possible functions of these signals and how this bimodal system may be used in intra- and interspecific mate evaluation.

A genome-wide approach for uncovering evolutionary relationships of Australian Bactrocera species complexes (Diptera: Tephritidae)

2019 ◽  
Author(s):  
Renee A. Catullo ◽  
Heng L. Yeap ◽  
Siu F. Lee ◽  
Jason G. Bragg ◽  
Jodie Cheesman ◽  
...  
Keyword(s):  
Southeast Asia ◽  
Phylogenetic Reconstruction ◽  
Fruit Fly ◽  
Evolutionary Relationships ◽  
Pest Species ◽  
Nucleotide Polymorphisms ◽  
Male Response ◽  
Biogeographic History ◽  
A Genome ◽  
Important Pest

Australia and Southeast Asia are hotspots of global diversity in the fruit-fly genus Bactrocera. Although a great diversity of species has been long recognised, evolutionary relationships are poorly understood, largely because previous sequencing techniques have provided insufficient historical signal for phylogenetic reconstruction. Poorly understood biogeographic history in Bactrocera has prevented a deeper understanding of migratory patterns in this economically important pest group. Using representatives from Australia and Malaysia, we tested the utility of a genome-reduction approach that generates thousands of single-nucleotide polymorphisms for phylogenetic reconstructions. This approach has high utility for species identification because of the ease of sample addition over time, and the species-level specificity able to be achieved with the markers. These data have provided a strongly supported phylogenetic tree congruent with topologies generated using more intensive sequencing approaches. In addition, our results do not support taxonomic assignments to species complex for a number of species, such as B. endiandrae in the dorsalis complex, yet find a close relationship between B. pallida and the dorsalis species. Our data have further validated non-monophyletic evolution of male response to primary attractants. We also showed at least two diversification events between Australia and Southeast Asia, indicating trans-regional dispersal in important pest species.

scholarly journals Interpopulational and seasonal variation in the chemical signals of the lizardGallotia galloti

PeerJ ◽  
2017 ◽  
Vol 5 ◽  
pp. e3992 ◽  
Author(s):  
Roberto García-Roa ◽  
Rodrigo Megía-Palma ◽  
Jesús Ortega ◽  
Manuel Jara ◽  
Pilar López ◽  
...  
Keyword(s):  
Seasonal Variation ◽  
Chemical Cues ◽  
Chemical Signals ◽  
Reproductive Season ◽  
Seasonal Effects ◽  
Chemical Profile ◽  
Interpopulational Variation ◽  
Chemical Profiles ◽  
Femoral Gland Secretions ◽  
Interpopulational Variability

Communicative traits are strikingly diverse and may vary among populations of the same species. Within a population, these traits may also display seasonal variation. Chemical signals play a key role in the communication of many taxa. However, we still know far too little about chemical communication in some vertebrate groups. In lizards, only a few studies have examined interpopulational variation in the composition of chemical cues and signals and only one study has explored the seasonal effects. Here we sampled three subspecies of the Tenerife lizards (Gallotia galloti) and analyze the lipophilic fraction of their femoral gland secretions to characterize the potential interpopulational variation in the chemical signals. In addition, we assessed whether composition of these secretions differed between the reproductive and the non-reproductive season. We analyzed variations in both the overall chemical profile and the abundance of the two main compounds (cholesterol and vitamin E). Our results show interpopulational and seasonal differences inG. gallotiachemical profiles. These findings are in accordance with the high interpopulational variability of compounds observed in lizard chemical signals and show that their composition is not only shaped by selective factors linked to reproductive season.

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