Showing 6 results for Butterfly
Md. Samsur Rahman, Ibrahim Khalil Al Haidar, Amit Kumer Neogi, Md. Ashraf Ul Hasan, Md. Mizanur Rahman, Sheikh Muhammad Shaburul Imam,
Volume 2, Issue 3 (9-2016)
Abstract
During the study of butterflies of Bangladesh (Insecta: Lepidoptera) which carried out since June 2014 to March 2016, several expeditions were made by the authors in the different areas of Bangladesh and many butterfly species were collected and identified. Among them, five species namely, Zezius chrysomallus Hübner, 1823, Rapala tara de Niceville, 1988, Cethosia biblis Fruhstorfer, 1912 and Atrophaneura coon Fabricius, 1793, Cephren estrichopepla Lowe, 1908; and one subspecies, Pelopidas subochracea subochracea Moore, 1878 are newly reported for the fauna of Bangladesh and their distribution data are presented. This study was achieved with an aim to update the checklist of butterflies of Bangladesh. The previous sampling gaps in some areas of Bangladesh indicated by these newly reported species which may put forward further investigations on the butterflies of this country.
Prakash Gaudel, Manisha Paudel, Prabin Gaudel, Bal Ram Giri, Bimal Raj Shrestha,
Volume 6, Issue 1 (3-2020)
Abstract
Increasing roads become the serious conservation threats to the animal populations. The most direct effect of roads on them is deadly collision with vehicles, leading to high levels of injury or death. Estimates of detectability of road-killed higher vertebrates have been determined but not for the invertebrates like butterflies, although they are frequently killed insects group on roads. This is the first comprehensive mortality census of road-killed butterflies in Nepal. The main aim of this study was to estimate the detectability of road-killed butterflies in Mahendra Highway, the busiest highway in Nepal. We established eight transects, each of 500 m long within the randomly selected forest and human settlement landscapes. Pearson’s correlation was calculated to test the link between the number of road-killed and living butterflies. All together 1000 butterfly individuals were counted throughout the study periods including road-killed and living butterflies. Among them, 364 butterflies were counted raodkilled whereas 636 butterflies were living. Forest landscape contributed higher number in both road-killed and living butterflies than human settlement landscape. Also, the number of butterflies killed on the roads were significantly correlated with number of living butterflies on the road. Our results indicate that road has the significant impact on loss of butterfly population. Also, higher the number of living butterflies more will be road mortality. The public awareness and maintaining the habitats with high forbs cover, gardening, avoid depositing asphalts, etc. in the vicinity of road can denigrate the rate of road mortality of butterflies.
Volume 6, Issue 21 (3-2013)
Abstract
This paper uses the theory of "the implied reader in the book" by Aiden Chambers to analyze two of Ahmadi's latest works, "The butterfly had fallen asleep on my pillow" and "The girl, the fish, and the loneliness". To know the implied reader and his/her characteristics, Chambers suggests studying the four factors of style, point of view, partialityand and empty spaces. These factors play an important role in children's books and help the author communicate with the reader. The results show the implied readers in his books are thoughtful and capable children with pure imaginations and innovative souls who are able to enjoy the beauties of the story and discover the hidden concepts in it. Also the depth and complexity in Ahmadi's books provoke the adults and the young adults to read and enjoy his works. Keywords: Aidan Chambers, Ahmadreza Ahmadi, Children Story, Implied Reader, The butterfly had fallen asleep on my pillow, The girl, the fish, and the loneliness.
Volume 10, Issue 4 (11-2021)
Abstract
Butterflies are flagship taxa and bio-indicator of terrestrial ecosystems. Studies of butterflies are performed in different regions of Nepal, but no detailed research has been carried out in Tanahun. Hence, this study was conducted to determine the species diversity and abundance of butterflies in Byas municipality-6 of the Tanahun, Nepal, from March to November 2020. The Pollard walk method was used for the data collection. A total of six transects of 500 m, two in each habitat type (forests, settlements, and agricultural lands), were laid out randomly. The study was performed in three seasons (9 months); Pre-Monsoon (March to May), Monsoon (June to September), and Post-Monsoon (October to November). Each transect was surveyed nine times (once a month) to record species in each month. Data were pooled and analyzed with SPSS. A total of 1,753 individuals of 149 butterfly species from 92 genera and six families were recorded during the study. The overall Shannon-Wiener and Margalef diversity indices were H = 4.17 and R = 19.95. Pielou’s Evenness was E = 0.83. Nymphalidae was the most diverse, richest species, and most abundant family (H = 3.33, R = 8.30, N = 851). Species evenness was maximum in the family Papilionidae (E = 0.88). The forests comprised the maximum number of species (115 species, 898 individuals). The maximum number of species was recorded in March (106 species), while the highest species abundance was in June (268 individuals). The result of this study could be the baseline for further researches on butterflies in the Tanahun district.
Volume 13, Issue 1 (3-2024)
Abstract
The overwintering conditions and cold tolerance of the Lime butterfly, Papilio demoleus L., are relatively unclear. In the present study, overwintering pupae were collected over several months, and changes in supercooling point (SCP), cold-hardiness, and body color were investigated. Also, some eggs were collected and reared in the laboratory, and then pupae were kept for 1-4 weeks at 0, 5, and 15 °C, and the changes in SCPs were studied. Shelters were prepared and installed in the field to check the overwintering sites. Also, the digestive tract was investigated before and at the beginning of the overwintering phase. The results showed that the SCP gradually decreased from -9 to -13 °C during the autumn months, and in lab-reared pupae treated at 0-5 °C, the SCP was reduced to -13 °C. None of the pupae survived at temperatures below the SCP, so this species uses a freeze avoidance strategy. As the weather gets cold, the color of most of the pupae (76.19%) tends to brown, while in the summer months, more than 80% of the pupae are green. The overwintering pupae emptied their ingested foods, and the contents of their digestive system before emptying contain Pseudomonas and Enterobacter species, both of which can act as ice nucleators. Ultimately, the relationship between these factors in adapting the pest to low temperatures was discussed.
Volume 27, Issue 3 (10-2020)
Abstract
Conceptual metaphor is a modern method of expressing thoughts, and hidden and inner mental concepts whose appearance in literature is not possible except with a considerable effort. This method was first developed by two European authors named Laykov and Johnson. Conceptual metaphor emerges among people's common speech mechanism. War, being driven and displacement are among complex and hidden concepts which can only be observed through epic poetry in literature. The modern epic phenomenon in the current era is noticed among Palestinian Resistance poets especially Mahmud Darwish. Although the words resonate with past Arab poets such as Antarah, Tarafa and others allowed them to portray battlefields and their events, Mahmud Darwish placed concept of war and fighting in the form of durable sonnets which we won't face with any difficulties in comprehending them and creating rhetoric frameworks. Mahmud Darwish, known as the Poet of Resistance and one of the romantic symbolist ones, has widely utilized conceptual metaphor besides rhetoric techniques and symbols in his poems. In this study, we tried to analyze conceptual metaphors reflecting poet's inner thoughts and expressing events such as war, plundering and displacement in his country by using analytical-descriptive method. We found that concepts like movement, life and humanity are the most mental concepts in the poet's works and can be consider as the criteria for evaluating conceptual metaphor. We concluded that the poet has made use of conceptual metaphors to depict the Palestinian Resistance and this method is a simple way to express the amount of his grief and painful memories.