Warning coloration in sawflyAthalia rosae larva and concealing coloration in butterflyPieris rapae larva feeding on similar plants evolved through individual selection

1993 ◽  
Vol 35 (2) ◽  
pp. 223-230 ◽  
Author(s):  
Yoshitsugu Ohara ◽  
Koukichi Nagasaka ◽  
Naota Ohsaki
Keyword(s):  
Individual Selection ◽  
Warning Coloration ◽  
Larva Feeding

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.

Aposematism

2018 ◽  
Author(s):  
Graeme D. Ruxton ◽  
William L. Allen ◽  
Thomas N. Sherratt ◽  
Michael P. Speed
Keyword(s):  
Secondary Effects ◽  
Warning Coloration ◽  
Common Features ◽  
Initial Evolution ◽  
The Common ◽  
Aposematic Signals

Aposematism is the pairing of two kinds of defensive phenotype: an often repellent secondary defence that typically renders prey unprofitable to predators if they attack them and some evolved signal that indicates the presence of that defence. Aposematic signals often work to modify the behaviours of predators both before and during attacks. Warning coloration, for example, may increase wariness and hence improve the chances that a chemically defended prey is released unharmed after an attack. An aposematic signal may therefore first tend to reduce the probability that a predator commences attack (a primary defence) and then (as a component of secondary defence) reduce the probability that the prey is injured or killed during any subsequent attack. In this chapter we will consider both the primary and the secondary effects of aposematic signals on prey protection. We begin first by describing the common features of aposematic signals and attempting to show the wide use to which aposematic signalling is deployed across animals (and perhaps plants too). We then review the interesting evolutionary issues aposematic signals raise, including their initial evolution and their integration with sexual and other signals. We also discuss important ecological, co-evolutionary, and macroevolutionary consequences of aposematism.

scholarly journals The order and logic of CD4 versus CD8 lineage choice and differentiation in mouse thymus

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Mohammad M. Karimi ◽  
Ya Guo ◽  
Xiaokai Cui ◽  
Husayn A. Pallikonda ◽  
Veronika Horková ◽  
...  
Keyword(s):  
Gene Expression ◽  
T Cell ◽  
Single Cell ◽  
Signal Strength ◽  
Gene Activity ◽  
Cytotoxic T Cell ◽  
Individual Selection ◽  
Cell Lineages ◽  
Single Cell Rna Sequencing ◽  
Tcr Signals

AbstractCD4 and CD8 mark helper and cytotoxic T cell lineages, respectively, and serve as coreceptors for MHC-restricted TCR recognition. How coreceptor expression is matched with TCR specificity is central to understanding CD4/CD8 lineage choice, but visualising coreceptor gene activity in individual selection intermediates has been technically challenging. It therefore remains unclear whether the sequence of coreceptor gene expression in selection intermediates follows a stereotypic pattern, or is responsive to signaling. Here we use single cell RNA sequencing (scRNA-seq) to classify mouse thymocyte selection intermediates by coreceptor gene expression. In the unperturbed thymus, Cd4+Cd8a- selection intermediates appear before Cd4-Cd8a+ selection intermediates, but the timing of these subsets is flexible according to the strength of TCR signals. Our data show that selection intermediates discriminate MHC class prior to the loss of coreceptor expression and suggest a model where signal strength informs the timing of coreceptor gene activity and ultimately CD4/CD8 lineage choice.

Preparation of Sub-Criteria for Mathematical Modeling of Multi-Criteria Decision Making

2014 ◽  
Vol 1020 ◽  
pp. 765-768
Author(s):  
Eva Berankova ◽  
František Kuda ◽  
Stanislav Endel
Keyword(s):  
Decision Making ◽  
Public Service ◽  
Input Data ◽  
Decision Making Process ◽  
Multi Criteria Decision Making ◽  
Individual Selection ◽  
Qualitative And Quantitative ◽  
Data Analyses ◽  
Quantitative Characters ◽  
The Subject

The subject of this paper is to evaluate criteria in the decision-making process for choosing new usable office facilities in light of a big company or public service seeking for new usable office facilities. The criteria defining the requirements for individual selection variants enter into this decision-making process. These criteria have qualitative and quantitative characters. In order to model the criteria, it is desirable that their values are standardized. The method of standardization of these criteria is given in this paper. In this paper, attention is paid to the decision-making process in the course of choosing new usable facilities in administration objects. This decision-making process is based on input data analyses and on conclusions for a certain selection variant resulting from them.

scholarly journals STUDY VARIETY INDEXES OF VARIETY KIBRAY OF KASHKAR BEDA (MELILOTUS ALBUS)

2020 ◽  
pp. 183-185
Author(s):  
Fozilbek Nurullaevich Torеev ◽  
Djabbarkhon Djamalkhanovich Akhmedov ◽  
Muzaffar Matyakubovich Yakubov ◽  
Gavkhar Abdakhatovna Tilovova ◽  
Nasiba Umarovna Mavlanova
Keyword(s):  
Seed Production ◽  
Individual Selection ◽  
Mass Yield ◽  
Protein Food ◽  
Green Mass ◽  
Local Diversity ◽  
Melilotus Albus ◽  
Green Mass Yield ◽  
High Yields ◽  
Root Nitrogen

Enhancing of soil fertility is required for getting high yields from cotton plant, cereals and other crops in Uzbekistan. It may be achieved through implementation of crop rotation, properly introduction of rotation and by the planting of kashkar beda, alfalfa and other bean bearing crops. Planting of Kibray variety of Kashkar beda in strongly salted areas and may be produced high yields than ordinary blue alfalfa. It’s an average green mass yield accounts for 4.0-4.5 tons per hectare, 1 kg green mass contains 17-25 g protein and 0,16-0,20 food units what is a nutritious food for agricultural animals. Beside this, due to its root nitrogen-fixing capability. It may be taken durable high yields from other crops in its planted area. Keywords: Kashkar beda (local diversity of alfalfa), blue alfalfa, green stem, salinization, productivity, protein, food unit, forage, farmstead, variety, seed production, elite, primary seed production, nutritional crops, green mass, morphologic traits, germination, variety grade, nursery, individual selection, phonologic monitoring, Kibray variety, variety of Tashkent-2009. KEYWORDS: Kashkar beda, Melilotus albus, variety, green mass, morphologic traits, germination.

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