OVIPOSITION SITE SELECTION IN TENEBRIO MOLITOR (COLEOPTERA: TENEBRIONIDAE)

1984 ◽  
Vol 116 (1) ◽  
pp. 27-39 ◽  
Author(s):  
G. H. Gerber ◽  
D. U. Sabourin
Keyword(s):  
Site Selection ◽  
Tenebrio Molitor ◽  
Poor Quality ◽  
Oviposition Site ◽  
Adult Density ◽  
Oviposition Site Selection ◽  
Quality Food ◽  
Age Related ◽  
Eggs And Larvae ◽  
Oviposition Sites

AbstractOviposition site selection by Tenebrio molitor L. was studied in cylindrical cages 10 cm in diameter × 28 cm in height using females up to 16 days old. Oviposition site selection is not a haphazard process. The adults are surface dwellers and the females normally enter the foodstuff to oviposit. The distance travelled into the foodstuff was age-related; the females went gradually deeper until the 9th day after eclosion. Physical and chemical factors (i.e. type and quality of foodstuff) and biological factors (i.e. adult density and presence of T. molitor eggs and larvae) were assessed when oviposition sites were selected by this insect. The females attempted to avoid poor quality food when selecting oviposition sites and usually laid fewer eggs and died sooner when poor quality food was present. As adult density increased, the females went deeper to oviposit. The females also went deeper to oviposit when eggs and larvae were present, but the effects of eggs and larvae were small and there seemed to be threshold densities as far as both factors were concerned. The behavioural significance of the data is discussed.

scholarly journals Sex-Specific Oviposition Site Selection and Hatching Success in an Arboreal Treefrog: Implications of a Paternal Nest-Site Selection

2021 ◽  
Author(s):  
Ming-Feng Chuang ◽  
Nien-Tse Fuh ◽  
Sinlan Poo ◽  
Yeong-Choy Kam
Keyword(s):  
Water Depth ◽  
Female Choice ◽  
Site Selection ◽  
Nest Site ◽  
Hatching Success ◽  
Oviposition Site ◽  
Offspring Survival ◽  
Oviposition Site Selection ◽  
Resource Defense ◽  
Oviposition Sites

Abstract Oviposition sites selected by parents is an important factor that affects offspring survival and parental fitness. A good nest site offers offspring protection from competition, predation, and harsh environmental conditions. In amphibians, though oviposition sites are generally determined by females, the distinction between male and female choice can be blurred in species with resource defense mating systems, where males occupy the territory that eggs are deposited before advertising for females. Using a phytotelm-breeding frog (Kurixalus eiffingeri) with male territoriality and biparental care, we examined 310 oviposition sites to determine (1) male choice based on physical characteristics of the site (stump height, inner diameter, stump depth, water depth), and (2) female choice based on site characteristics and male characteristics (snout-vent length and body condition). We hypothesized that either one or both sexes would select oviposition site based on characteristics correlate with higher offspring survivorship. We found that males preferred sites with deeper pools of water, while females showed no preference for sites or males based on the characteristics observed. While we cannot prove any nest traits directly benefit offspring, we contend that increased water depth within the phytotelm may 1) protect male frog from snake predation, which would allow for continued paternal care that increases the hatching success and 2) improve the offspring survival during the larval period. Our findings provide empirical evidence of male-driven oviposition site selection in an amphibian and highlight often overlooked role that males play in increasing their reproductive output by selecting for sites that benefit their offspring.

scholarly journals Social signals mediate oviposition site selection in Drosophila suzukii

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Johanna E. Elsensohn ◽  
Marwa F. K. Aly ◽  
Coby Schal ◽  
Hannah J. Burrack
Keyword(s):  
Site Selection ◽  
Oviposition Behavior ◽  
Oviposition Site ◽  
Invasive Pest ◽  
Oviposition Site Selection ◽  
Social Signals ◽  
Drosophila Suzukii ◽  
Egg Density ◽  
Behavioral Evidence ◽  
Oviposition Sites

AbstractThe information that female insects perceive and use during oviposition site selection is complex and varies by species and ecological niche. Even in relatively unexploited niches, females interact directly and indirectly with conspecifics at oviposition sites. These interactions can take the form of host marking and re-assessment of prior oviposition sites during the decision-making process. Considerable research has focused on the niche breadth and host preference of the polyphagous invasive pest Drosophila suzukii Matsumura (Diptera: Drosophilidae), but little information exists on how conspecific signals modulate oviposition behavior. We investigated three layers of social information that female D. suzukii may use in oviposition site selection—(1) pre-existing egg density, (2) pre-existing larval occupation, and (3) host marking by adults. We found that the presence of larvae and host marking, but not egg density, influenced oviposition behavior and that the two factors interacted over time. Adult marking appeared to deter oviposition only in the presence of an unmarked substrate. These results are the first behavioral evidence for a host marking pheromone in a species of Drosophila. These findings may also help elucidate D. suzukii infestation and preference patterns within crop fields and natural areas.

scholarly journals Suboptimal larval habitats modulate oviposition of the malaria vector mosquitoAnopheles gambiae

2015 ◽  
Author(s):  
Eunho Suh ◽  
Dong-Hwan Choe ◽  
Ahmed M Saveer ◽  
Laurence J Zwiebel
Keyword(s):  
Malaria Vector ◽  
Site Selection ◽  
Oviposition Preference ◽  
Oviposition Site ◽  
Oviposition Site Selection ◽  
Larval Habitats ◽  
Dimethyl Disulphide ◽  
Gravid Females ◽  
Oviposition Sites ◽  
Selection Of

Selection of oviposition sites by gravid females is a critical behavioural preference in the reproductive cycle ofAnopheles gambiae, the principal Afrotropical malaria vector mosquito. Several studies suggest this decision is mediated by semiochemicals associated with potential oviposition sites. To better understand the chemosensory basis of this behaviour and identify compounds that can modulate oviposition, we examined the generally held hypothesis that suboptimal larval habitats give rise to semiochemicals that negatively influence the oviposition preference of gravid females. Dual-choice bioassays indicated that oviposition sites conditioned in this manner do indeed foster significant and concentration dependent aversive effects on the oviposition site selection of gravid females. Headspace analyses derived from aversive habitats consistently noted the presence of dimethyl disulphide (DMDS), dimethyl trisulphide (DMTS) and 6-methyl-5-hepten-2-one (sulcatone) each of which unitarily affectedAn. gambiaeoviposition preference. Electrophysiological assays across the antennae, maxillary palp, and labellum of gravidAn. gambiaerevealed differential responses to these semiochemicals. Taken together, these findings validate the hypothesis in question and suggest that suboptimal environments forAn. gambiaelarval development results in the release of DMDS, DMTS and sulcatone that impact the response valence of gravid females to directly modulate the chemical ecology of oviposition site selection.

Oviposition-site selection by the toad Melanophryniscus rubriventris in an unpredictable environment in Argentina

2006 ◽  
Vol 84 (5) ◽  
pp. 699-705 ◽  
Author(s):  
F.J. Goldberg ◽  
S. Quinzio ◽  
M. Vaira
Keyword(s):  
Site Selection ◽  
Abiotic Factors ◽  
Breeding Site ◽  
Oviposition Site ◽  
Offspring Survival ◽  
Oviposition Site Selection ◽  
Forest Environment ◽  
Ephemeral Ponds ◽  
Unpredictable Environment ◽  
Oviposition Sites

Oviposition-site selection plays an important role in the reproductive success of amphibians. In unpredictable environments where resources vary within a season, amphibians should select oviposition sites using parameters that can be easily evaluated, or spawn in several ponds to increase offspring survival. Melanophryniscus rubriventris (Vellard, 1947) uses shallow ephemeral ponds in an unpredictable montane-forest environment. During 40 consecutive days, we surveyed potential spawning sites and measured several biotic and abiotic factors to determine if any of these factors influenced breeding-site selection. We also described the spawning behavior of this species. Water temperature and pond level (flooded or not) were significant predictors of whether a pond was used or not. Warmer ponds would permit accelerated development of larvae in habitats where ponds are ephemeral and their presence unpredictable. Because of the short and unpredictable hydroperiods, it will be better to select a pond full of water instead of evaluating other pond characteristics that can be very variable. Mating pairs spread several egg masses to different sites but in the same pond. This behavior is likely a consequence of pairs avoiding interactions with intruding males and not as a strategy to enhance offspring survival.

THE EFFECT OF CONSPECIFICS ON OVIPOSITION SITE SELECTION AND OVIPOSITION BEHAVIOUR IN AEDES TOGOI (THEOBOLD) (DIPTERA: CULICIDAE)

1997 ◽  
Vol 129 (6) ◽  
pp. 1173-1176 ◽  
Author(s):  
David Y. Onyabe ◽  
Bernard D. Roitberg
Keyword(s):  
Intraspecific Competition ◽  
Site Selection ◽  
Oviposition Preference ◽  
Food Supplements ◽  
Oviposition Site ◽  
Conspecific Attraction ◽  
Oviposition Site Selection ◽  
Suitable Site ◽  
Aedes Togoi ◽  
Oviposition Sites

AbstractTwo opposing hypotheses are tested regarding the choice of oviposition sites by female Aedes togoi (Theobold) mosquitoes: (i) conspecific avoidance—females discriminate against sites harboring conspecifics to reduce intraspecific competition for their offspring and (ii) conspecific attraction—females prefer sites with conspecifics because their presence indicates suitable conditions for larvae. Under laboratory conditions, A. togoi females laid many more eggs on rearing water (LRW) containing conspecific larvae, their waste, bacteria, and food supplements than on rearing water alone (RM). In another experiment, females showed an oviposition preference for LRW sites that were devoid of A. togoi eggs compared with those harboring 50 (0.3 eggs/mL) conspecific eggs. Further, it was discovered that females laid their eggs at several sites rather than at a single suitable site. Possible reasons for such choices are discussed.

Oviposition site selection: unresponsiveness ofDrosophilato cues of potential thermal stress

1997 ◽  
Vol 53 (3) ◽  
pp. 585-588 ◽  
Author(s):  
MARTIN E. FEDER ◽  
NATHANIEL BLAIR ◽  
HUNTER FIGUERAS
Keyword(s):  
Thermal Stress ◽  
Site Selection ◽  
Oviposition Site ◽  
Oviposition Site Selection
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