scholarly journals Feeding preferences of adult and juvenile rabbitfish Siganus argenteus in relation to chemical defenses of tropical seaweeds

1990 ◽  
Vol 60 ◽  
pp. 23-34 ◽  
Author(s):  
VJ Paul ◽  
SG Nelson ◽  
HR Sanger
Keyword(s):  
Chemical Defenses ◽  
Feeding Preferences

The role of algal chemical defenses in the feeding preferences of the long-spined sea urchin Diadema antillarum

2021 ◽  
Author(s):  
Lindsay J. Spiers ◽  
Sarah J. Harrison ◽  
Jessica M. Deutsch ◽  
Neha Garg ◽  
Valerie J. Paul
Keyword(s):  
Sea Urchin ◽  
Chemical Defenses ◽  
Feeding Preferences ◽  
Diadema Antillarum

Bagworm Survival and Feeding Preferences as Indicators of Resistance among Maples

2002 ◽  
Vol 20 (3) ◽  
pp. 138-142
Author(s):  
William E. Klingeman
Keyword(s):  
Host Plant ◽  
Ornamental Plants ◽  
Larval Feeding ◽  
Eastern United States ◽  
Feeding Preferences ◽  
Survival And Development ◽  
Early Instar ◽  
Moderate Resistance ◽  
Hybrid Cross ◽  
Plant Susceptibility

Abstract The bagworm (Thyridopteryx ephemeraeformis (Haworth)) is a polyphagous, native pest of numerous deciduous and evergreen ornamental plants. Bagworm larvae were used to investigate host plant susceptibility among ten species and cultivars of maples that are economically important and commonly encountered in landscapes in the eastern United States. Data analyses from 48-hour choice assays, conducted in the laboratory during 2000 and 2001, indicated that differences existed among maples for bagworm feeding preferences and host plant susceptibility. Results from the 48-hour trials were not as accurate as seasonal no-choice assays, however. No-choice assays during both seasons quantified resistance among maples that limited larval bagworm survival and development. Measurements of larval feeding injury demonstrated resistance in paperbark maple (Acer griseum (Franch.) Pax) and trident maple (A. buergerianum Miq.) when compared with other maples. Laboratory results were corroborated during 2001 by a no-choice field assay, in which early instar bagworm larvae performed well on the majority of maples. In contrast, paperbark maple and trident maple were resistant to bagworm feeding, while ‘Autumn Blaze’ Freeman maple (A. x freemanii E. Murray), a hybrid cross obtained by breeding A. rubrum with A. saccharinum, showed moderate resistance.

Olfactory responses and feeding preferences of Copitarsia uncilata (Lepidoptera: Noctuidae) to four aromatic herb specie

2017 ◽  
Vol 43 (2) ◽  
pp. 179
Author(s):  
Miguel Mendieta ◽  
Andreas Gaigl ◽  
Juan Carlos Getiva de la Hoz ◽  
Anibal Orlando Herrera
Keyword(s):  
Host Plant ◽  
Feeding Preferences ◽  
Larval Weight ◽  
Olfactory Responses ◽  
Host Selection Behavior ◽  
Selection Behavior ◽  
Larva Feeding ◽  
Plant Choice ◽  
Lepidoptera Noctuidae ◽  
Aromatic Herbs

Colombian aromatic herbs have great potential as an export commodity. The genus Copitarsia is considered as an economic and a quarantine pest attacking them. In herbivore insects, host plant choice is made by adults and influenced by host plant quality. There were performed olfactory and feeding tests by using four-arm olfactometer and offering four different aromatic herbs (basil, mint, rosemary, or thyme) to determine the host selection behavior of Copitarsia uncilata Burgos and Leiva. Parameters, such as adult choice, larval weight, and time spent by larva on particular herb were measured. The preferences of adults and immature of C. uncilata varied significantly among the herbs in olfactory and larva feeding tests. The adults showed significantly higher responses to essential oils of basil and rosemary. Higher weight of larva was recorded on mint and basil. Further studies on larval development and longevity of adults on different herbs are necessary.

scholarly journals Ecophysiological Aspects and sxt Genes Expression Underlying Induced Chemical Defense in STX-Producing Raphidiopsis raciborskii (Cyanobacteria) against the Zooplankter Daphnia gessneri

Toxins ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 406
Author(s):  
Mauro C. P. Vilar ◽  
Thiago F. C. P. Rodrigues ◽  
Luan O. Silva ◽  
Ana Beatriz F. Pacheco ◽  
Aloysio S. Ferrão-Filho ◽  
...  
Keyword(s):  
Induced Defense ◽  
Toxin Production ◽  
Grazing Pressure ◽  
Chemical Defenses ◽  
Widespread Occurrence ◽  
Genes Expression ◽  
Freshwater Bodies ◽  
Predator Response ◽  
Aquatic Food ◽  
Shed Light

Cyanobacteria stand out among phytoplankton when they form massive blooms and produce toxins. Because cyanotoxin genes date to the origin of metazoans, the hypothesis that cyanotoxins function as a defense against herbivory is still debated. Although their primary cellular function might vary, these metabolites could have evolved as an anti-predator response. Here we evaluated the physiological and molecular responses of a saxitoxin-producing Raphidiopsis raciborskii to infochemicals released by the grazer Daphnia gessneri. Induced chemical defenses were evidenced in R. raciborskii as a significant increase in the transcription level of sxt genes, followed by an increase in saxitoxin content when exposed to predator cues. Moreover, cyanobacterial growth decreased, and no significant effects on photosynthesis or morphology were observed. Overall, the induced defense response was accompanied by a trade-off between toxin production and growth. These results shed light on the mechanisms underlying zooplankton–cyanobacteria interactions in aquatic food webs. The widespread occurrence of the cyanobacterium R. raciborskii in freshwater bodies has been attributed to its phenotypic plasticity. Assessing the potential of this species to thrive over interaction filters such as zooplankton grazing pressure can enhance our understanding of its adaptive success.

Effects of heavy metal-mediated intraspecific variation in leaf litter on the feeding preferences of stream detritivores

2021 ◽  
Vol 763 ◽  
pp. 144591
Author(s):  
Run Liu ◽  
Yueting Pan ◽  
You Fang ◽  
Lu Pang ◽  
Jiachen Shen ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Leaf Litter ◽  
Intraspecific Variation ◽  
Feeding Preferences
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