scholarly journals Variations of Movement, Dispersal, and Morphometrics among Subpopulations of Javan Endemic Damselfly, Drepanosticta spatulifera (Odonata: Platystictidae) in Petungkriyono Forest

2021 ◽  
Vol 6 (3) ◽  
pp. 65612
Author(s):  
Amelia Nugrahaningrum ◽  
R.C. Hidayat Soesilohadi

Drepanosticta spatulifera is a Javan endemic damselfly. The population is spread unevenly in the Petungkriyono Forest and is threatened due to environmental pressure. The aims of this research are to know the variation of the movement, dispersal, and morphometric among subpopulations of D. spatulifera. Movement and dispersal variation data collection was done using Mark Release Recapture (MRR) for six weeks from early August until mid-September 2020. The collection of morphometric samples was done during the last week of the MRR survey and 46 individuals were measured with 12 continuous characters. During the MRR survey, 596 males of D. spatulifera were marked and 302 were recaptured. D. spatulifera had short movement and dispersal thus no individuals were found across the subpopulations. The distance moved of successive capture and net lifetime movement were dominantly less or equal to five meters. The duration of the MRRsurvey had a low correlation with the dispersal distance of D. spatulifera. In themorphometric variations, closer subpopulations tended to have a similar cluster ofmorphometric characters. Variation of distance moved between successive captureand wing size from Mangli Stream was significantly different from other sites. Thesubpopulation of Mangli, the farthest and higher altitude of the sites, had thehighest distance move, more disperse, and the largest wing size. Our study showedthat D. spatulifera was extremely sedentary damselfly. It will enhance inbreeding andvulnerability to extinction. Therefore, the interaction between the subpopulationsof D. spatulifera in the Petungkriyono Forest needs to be done more.

2013 ◽  
Vol 8 (7) ◽  
pp. 662-669 ◽  
Author(s):  
Piotr Skórka ◽  
Piotr Nowicki ◽  
Joanna Kudłek ◽  
Aleksandra Pępkowska ◽  
Ewa Śliwińska ◽  
...  

AbstractMovements and flight morphology of the endangered Large Blue butterflies Phengaris teleius and P. nausithous in southern Poland were studied with mark-release-recapture surveys and GIS analyses. Most individuals moved relatively small distances (<40 metres) within their habitat patches. Distances covered by both species were positively related to season progression and wing length, and negatively related to body mass. P. teleius movement distances slightly exceeded those of P. nausithous. In addition, females moved longer distances than males, although the difference was significant only in P. teleius. Morphological traits appeared to be good indicators of the inter-specific and inter-sexual differences in mobility. While P. teleius individuals were heavier than P. nausithous ones, they had considerably longer wings, which may explain longer movements in the former species. Similarly, females were heavier than males in both species, but they invested more in wing size, which is likely to compensate for the negative impact of body mass on movement distances. Our results indicate that combination of GIS analysis of movement distances recorded with mark-release-recapture methods and morphometric measurements taken in field during non-lethal handling of captured individuals proved useful for studying the mobility potential of the endangered insect species.


2011 ◽  
Vol 8 (3) ◽  
pp. 445-453 ◽  
Author(s):  
Catrine Tudor-Locke ◽  
David R. Bassett ◽  
Michael F. Shipe ◽  
James J. McClain

Background:The purpose of this review is to update the methodological aspects of pedometry to encourage the consistent use of pedometers for assessment, to decrease sources of error, and to facilitate comparison and interpretation of results.Methods:The specific measurement topics addressed include: instrument choice, metric choice, validity, reliability, data collection and retrieval, time worn, day-to-day variability, monitoring time frame, reactivity, and data treatment.Results:A wide variety of valid and reliable instruments are commercially available and we can expect continued evolutions in value-added features as supporting technology improves. Data collection and retrieval has been achieved through various methods, including face-to-face contact, fax, e-mail, website, and conventional mail, and sometimes a combination of these. Day-to-day variation is not random, as would be expected from inconsistent pedometer performance, but rather exposes true behavior instability that can be explained by other factors and described using a coefficient of variation. Data reduction should be conducted cautiously and only after a full discovery (and disclosure) of its impact on aggregated group statistics and their relationship with other parameters.Conclusions:We have no doubt that research with pedometers will continue to yield new and important insights in the coming years.


2019 ◽  
Vol 8 (2) ◽  
Author(s):  
Salomon Tri Rima Setyawati, Ari Hepi Yanti

Tylonycteris pachypus is included into Vespertilonidae family which nesting in bamboo (Bambusa maculata) in rubber plantation of Jangkok Hamlet, Air Besar Sub-District, Landak District. The aim of this study was to determine the population structure of bats and the characteristics of bamboo nests. Data collection was carried out from May to July 2017. The method used was Capture Mark Release Recapture (CMRR), the bats caught were marked with red-oil paint on the back. The results showed that one group of T. pachypus nesting in bamboo consisted of 2 adult males, 1 male young bat, and 6 adult females. The estimated total population of 14 estimated population is (SE ± 2,09). The bamboo cavity that is made as the nest by             T. pachypus has a smooth inner-wall texture, moist, with a section length of 406 mm, a diameter of 41 mm, and it is at the altitude of 1870 mm above the ground. Cracks or inlets on bamboo as the entrance is small and narrow with a vertical length of 33 mm and a horizontal width of 8-10 mm.


2019 ◽  
Vol 8 (2) ◽  
pp. 78-87
Author(s):  
Annisa Ul Afidah ◽  
Hari Bakti Mardikantoro

Penelitian ini membahas variasi bahasa Jawa di Kabupaten Cilacap pada tataran fonologi dan leksikon. Titik pengamatan dalam penelitian ini berjumlah 4 yang merupakan daerah-daerah yang berbatasan dengan Kabupaten Pangandaran, Jawa Barat, yaitu Desa Kedungreja, Kecamatan Kedungreja dan Desa Tambakreja, Kecamatan Kedungreja serta Desa Purwodadi dan Desa Rawaapu, Kecamatan Patimuan. Pengumpulan data menggunakan metode pupuan lapangan danmetode cakap. Data-data yang telah terkumpul kemudian dianalisis menggunakan metode padan fonetis artikulatoris dan teknik pilah unsur penentu (teknik PUP) dengan teknik lanjutan yaitu teknik HBB dan teknik HBS. Hasil penelitian menunjukkan bahwa ditemukan variasi bahasa Jawa Cilacap (BJC) berupa variasi fonologi dan leksikon. Variasi fonologi meliputi variasi bunyi vokal dan konsonan serta korespondensi bunyi vokal dan konsonan. Variasi leksikon meliputi gejalaonomasiologis dan semasiologis. Data variasi fonologi dan leksikon tersebut selanjutnya disajikan dalam peta bahasa. Faktor-faktor geografis wilayah menjadi akibat munculnya variasi bahasa Jawa di Kabupaten Cilacap, khususnya di wilayah perbatasan Jawa-Sunda. This study discusses the variation of Javanese language in Cilacap Regency at the level of phonology and  lexicon. Observation points in this study amounted to 4 which are areas bordering Pangandaran Regency, West Java, namely Kedungreja Village, Kedungreja District and Tambakreja Village, Kedungreja District and Purwodadi Village and Rawaapu Village, Patimuan District. Data collection uses field methods and proficient methods. The data that has been collected is then analyzed using the phonetic articulatory matching method and the technique of determining the determinants (PUP techniques) with advanced techniques, namely HBB techniques and HBS techniques. The results showed that variations in the Cilacap Javanese language (BJC) were found in variations of phonology and lexicon. Phonological variations include variations of vowel and consonant sounds and correspondence of vowel and consonant sounds. The lexicon variation includes onomasiological and semasiological symptoms. The phonological and lexicon variation data are then presented in the language map. The geographical factors of the region were due to the emergence of variations in Javanese language in Cilacap Regency, especially in the Javanese-Sundanese border region.


2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Maria L. Kaiser ◽  
Oliver R. Wood ◽  
David Damiens ◽  
Basil D. Brooke ◽  
Lizette L. Koekemoer ◽  
...  

Abstract Background Anopheles arabiensis is a major malaria vector, recently implicated as contributing to ongoing residual malaria transmission in South Africa, which feeds and rests both indoors and outdoors. This species is, therefore, not effectively targeted using core malaria vector control interventions alone. Additionally, increasing resistance to available insecticides necessitates investigations into complementary non-insecticide-based vector control methods for outdoor-resting mosquitoes. The feasibility of the sterile insect technique (SIT) as a complementary vector control intervention is being investigated in South Africa. Successful implementation of an SIT programme largely depends on inundating a target insect population with sterilized laboratory-bred males. Therefore, knowledge of the native population size and dispersal ability of released sterile laboratory-reared males is critical. In this study, we estimated the male An. arabiensis population size and the dispersal of released males in an area targeted for a pilot sterile male release programme. Methods Three separate releases were performed within a 2-year period. Approximately 5000–15,000 laboratory-reared male An. arabiensis (KWAG) were produced and marked for mark–release–recapture experiments. To recapture released mosquitoes, cloth tubes were deployed in widening concentric circles. The average dispersal distance of released males was calculated and the wild male An. arabiensis population size was estimated using two Lincoln index formulae. The natural population was sampled concurrently and Anopheles species diversity examined. Results The Anopheles gambiae complex and An. funestus group species made up the majority of wild collections along with other anophelines. The An. arabiensis population size was estimated to be between 550 and 9500 males per hectare depending on time of year, weather conditions and method used. Average dispersal distance of marked males ranged from 58 to 86 m. Marked males were found in swarms with wild males, indicating that laboratory-reared males are able to locate and participate in mating swarms. Conclusions It was logistically feasible to conduct mark–release–recapture studies at the current scale. The population size estimates obtained may provide a guideline for the initial number of males to use for a pending SIT pilot trial. It is promising for future SIT trials that laboratory-reared marked males participated in natural swarms, appearing at the right place at the right time.


2018 ◽  
Vol 3 (3) ◽  
pp. 474
Author(s):  
Liza Merianti ◽  
Elsa Abel Nuine

<p><em>Sibling rivalry is a competition or rivalry, jealousy and anger between siblings Sibling rivalry is seen at 3-5 years of age (preschool) and will recur when 8-12 years (school age). The incidence of sibling rivalry in school age is quite high  55%.This study aims to analysis the relationship between emotional developmentand with sibling rivalry in children aged 8-12 years. The type of research is descriptive correlation with cross sectional approach. The population in this study is all children aged 8-12 years with a sample of 68 respondents. Sampling in this study was done in total sampling. Data collection using sibling rivalry questionnaire and GSS EAS.The statistical test used is Spearman Rho. The statistical test used is Spearman Rho. The results showed that there was a low correlation between emotional development with sibling rivalry where p value = 0.001 with r -0.378. So it can be concluded that there is a relationship between the emotional development of children at  8-12 years old with sibling rivalry. Suggested to the school and parents can give attention by using a counseling approach in helping children to improve their emotional development, especially in children who have sibling rivalry.</em></p><p><em><br /></em></p><p><em>Sibling rivalry</em> merupakan kompetisi atau persaingan, kecemburuan serta kemarahan antar saudara. <em>Sibling rivalry</em> terlihat ketika usia 3-5 tahun (prasekolah) dan akan timbul kembali ketika 8-12 tahun (usia sekolah). Angka kejadian <em>sibling rivalry </em>di usia sekolah cukup banyak yakni 55%<em>.</em> Penelitian ini bertujuan untuk menganalisa hubungan antara perkembangan emosional dan pola asuh orang tua dengan <em>sibling rivalry</em> pada anak usia 8-12 tahun. Jenis penelitian adalah deskriptif korelasi<em>. </em>Populasi pada penelitian ini sebanyak 68 responden (<em>total sampling</em>). Pengumpulan data menggunakan kuesioner <em>sibling rivalry</em>, dan UNIT GSS EAS. Uji statistik yang digunakan adalah <em>Spearman Rho</em>. Hasil penelitian menunjukkan bahwa terdapat hubungan yang rendah antara perkembangan emosional dengan <em>sibling rivalry </em>dimana nilai p value = 0,001 dengan nilai r -0,378. Sehingga dapat disimpulkan bahwa terdapat hubungan antara perkembangan emosional anak umur 8 – 12 tahun dengan <em>sibling rivalry</em><em>. </em>Disarankan kepada sekolah dan orang tua dapat memberi perhatian dengan menggunakan pendekatan konseling dalam membantu anak meningkatkan perkembangan emosinya khususnya pada anak yang mengalami <em>sibling rivalry</em>.</p><p><em><br /></em></p>


2010 ◽  
Vol 32 (1) ◽  
pp. 2-9 ◽  
Author(s):  
George P. Patrinos ◽  
Jumana Al Aama ◽  
Aida Al Aqeel ◽  
Fahd Al-Mulla ◽  
Joseph Borg ◽  
...  

Author(s):  
S.W. Hui ◽  
D.F. Parsons

The development of the hydration stages for electron microscopes has opened up the application of electron diffraction in the study of biological membranes. Membrane specimen can now be observed without the artifacts introduced during drying, fixation and staining. The advantages of the electron diffraction technique, such as the abilities to observe small areas and thin specimens, to image and to screen impurities, to vary the camera length, and to reduce data collection time are fully utilized. Here we report our pioneering work in this area.


Author(s):  
Weiping Liu ◽  
Jennifer Fung ◽  
W.J. de Ruijter ◽  
Hans Chen ◽  
John W. Sedat ◽  
...  

Electron tomography is a technique where many projections of an object are collected from the transmission electron microscope (TEM), and are then used to reconstruct the object in its entirety, allowing internal structure to be viewed. As vital as is the 3-D structural information and with no other 3-D imaging technique to compete in its resolution range, electron tomography of amorphous structures has been exercised only sporadically over the last ten years. Its general lack of popularity can be attributed to the tediousness of the entire process starting from the data collection, image processing for reconstruction, and extending to the 3-D image analysis. We have been investing effort to automate all aspects of electron tomography. Our systems of data collection and tomographic image processing will be briefly described.To date, we have developed a second generation automated data collection system based on an SGI workstation (Fig. 1) (The previous version used a micro VAX). The computer takes full control of the microscope operations with its graphical menu driven environment. This is made possible by the direct digital recording of images using the CCD camera.


1997 ◽  
Vol 6 (4) ◽  
pp. 34-47 ◽  
Author(s):  
Steven H. Long ◽  
Lesley B. Olswang ◽  
Julianne Brian ◽  
Philip S. Dale

This study investigated whether young children with specific expressive language impairment (SELI) learn to combine words according to general positional rules or specific, grammatic relation rules. The language of 20 children with SELI (4 females, 16 males, mean age of 33 months, mean MLU of 1.34) was sampled weekly for 9 weeks. Sixteen of these children also received treatment for two-word combinations (agent+action or possessor+possession). Two different metrics were used to determine the productivity of combinatorial utterances. One metric assessed productivity based on positional consistency alone; another assessed productivity based on positional and semantic consistency. Data were analyzed session-by-session as well as cumulatively. The results suggest that these children learned to combine words according to grammatic relation rules. Results of the session-by-session analysis were less informative than those of the cumulative analysis. For children with SELI ready to make the transition to multiword utterances, these findings support a cumulative method of data collection and a treatment approach that targets specific grammatic relation rules rather than general word combinations.


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