scholarly journals Context-dependent behavioural plasticity compromises disruptive selection of sperm traits in squid

PLoS ONE ◽  
2021 ◽  
Vol 16 (8) ◽  
pp. e0256745
Author(s):  
Noritaka Hirohashi ◽  
Noriyosi Sato ◽  
Yoko Iwata ◽  
Satoshi Tomano ◽  
Md. Nur E. Alam ◽  
...  
Keyword(s):  
Sperm Competition ◽  
Mating Behaviour ◽  
Mantle Cavity ◽  
Disruptive Selection ◽  
Behavioural Plasticity ◽  
Reproductive Tactics ◽  
Transitional State ◽  
The Family ◽  
Nearly Continuous ◽  
Selection Of

Sperm morphology is generally uniform within a species due to selective pressures that act to achieve better fertilization outcomes under postcopulatory competitive circumstances. Therefore, polyandry that intensifies post-mating sperm competition should constrain intraspecific sperm polymorphism. Contrary to this paradigm, we previously found that a polyandrous squid, Heterololigo bleekeri, produces dimorphic eusperm (flagellum length dimorphism; FLD), which is closely associated with alternative reproductive tactics (ARTs); large males (consorts) transfer their spermatophores inside the female’s mantle cavity, while small males (sneakers) do so outside the mantle. Thus, FLD was considered as the consequence of different insemination strategies that arise from different modes of sperm competition, sperm storage and the fertilization environment. However, in other squid species showing ARTs, the choice of mating behaviour is rather conditional (i.e., switching mating tactic between consorts and sneakers), which poses the question of whether sperm FLD could have evolved. Here, we investigated five species in the family Loliginidae that exhibit ARTs and found that all species showed sneaker-biased FLD. However, in a species with conditional ARTs, we found FLD rather ambiguous and the testicular somatic index to be nearly continuous among individuals at transitional state, suggesting that plasticity in mating behaviour compromises the disruptive selection on a sperm morphological trait.

scholarly journals Context-dependent behavioral plasticity compromises disruptive selection on sperm traits in squid

2020 ◽  
Author(s):  
Noritaka Hirohashi ◽  
Noriyosi Sato ◽  
Yoko Iwata ◽  
Satoshi Tomano ◽  
Md Nur E Alam ◽  
...  
Keyword(s):  
Behavioral Plasticity ◽  
Mating Behaviour ◽  
Social Contexts ◽  
Disruptive Selection ◽  
Behavioural Plasticity ◽  
Male Mating ◽  
Reproductive Tactics ◽  
Developmentally Regulated ◽  
Mating Opportunities ◽  
Sperm Traits

Male animals are not given equal mating opportunities under competitive circumstances. Small males often exhibit alternative mating behaviours and produce spermatozoa of higher quality to compensate for their lower chances of winning physical contests against larger competitors [1]. Because the reproductive benefits of these phenotypes depend on social status/agonistic ranks that can change during growth or aging [2], sperm traits should be developed/switched into fitness optima according to their prospects. However, reproductive success largely relies upon social contexts arising instantaneously from intra- and inter-sexual interactions, which deter males from developing extreme traits and instead favour behavioural plasticity. Nevertheless, the extent to which such plasticity influences developmentally regulated alternative sperm traits remains unexplored. Squids of the family Loliginidae are excellent models to investigate this, because they show sophisticated alternative reproductive tactics (ARTs) by which small males, known as “sneakers”, produce longer spermatozoa and perform extra-pair copulation to attach their sperm packages near the female seminal receptacle (SR). In contrast, large “consort” males have shorter spermatozoa and copulate via pair-bonding to insert their sperm packages near the internal female oviduct [3]. In addition, plasticity in male mating behaviour is common in some species while it is either rare or absent in others. Thus, squid ARTs display a broad spectrum of adaptive traits with a complex repertoire in behaviour, morphology and physiology [3].

Paralypusa, a new genus of the family Lypusidae (Lepidoptera: Gelechioidea) from China

2012 ◽  
Vol 21 (1) ◽  
pp. 169-172
Author(s):  
A.L. Lvovsky
Keyword(s):  
New Genus ◽  
Monotypic Genus ◽  
Transitional State ◽  
The Family

A new eastern-palaearctic monotypic genus of the gelechioid moths, Paralypusa gen. nov., is established for the Chinese species Paralypusa chinensis (Lvovsky, 2010), comb. nov. This genus is considered closely related to Lypusa Zeller, 1852 on the base of several synapomorphies. However Paralypusa also shares some features with the genera Pseudatemelia Rebel, 1910 and Amphisbatis Zeller, 1870. Its transitional state confirms the belonging of all the aforementioned genera to one family and synonymy of the Lypusidae Herrich-Schäffer, 1857 and Amphisbatidae Spuler, 1910 (Nieukerken et al., 2011).

Counseling Parents of Children With Behavior Problems: The Use of Extinction and Time-Out Techniques

PEDIATRICS ◽  
1977 ◽  
Vol 59 (1) ◽  
pp. 78-85
Author(s):  
Ronald S. Drabman ◽  
Greg Jarvie
Keyword(s):  
Problem Behaviors ◽  
Inappropriate Behavior ◽  
Time Intervals ◽  
Alternative Behavior ◽  
Home Setting ◽  
Time Out ◽  
Behavior Response ◽  
Disciplinary Problems ◽  
The Family ◽  
Selection Of

The pediatrician is the professional most frequently sought out for advice concerning disciplinary problems with children in the home. Behavioral psychologists have advocated the use of contingent ignoring and time-out procedures to help reduce problem behaviors; however, practicing pediatricians have found that these two procedures are often not successful. In fact, sometimes the two procedures seem to exacerbate inappropriate behavior. This paper documents the difficulties found in using the ignoring and/or time-out procedures in the home setting. Potential pitfalls in the use of ignoring, including not specifying the target behavior, not taking a baseline, inadvertently, intermittently reinforcing the inappropriate behavior, response bursts, spontaneous recovery, and not reinforcing an appropriate alternative behavior, are described. In addition, several pitfalls in the use of the time-out procedure, including selection of isolation area, inappropriate selection of time intervals, interference from others in the family, and escape attempts on the part of the child are discussed. For each potential problem a remedy is suggested.

On the authorship and publication dates of Theraphosa and Theraphosidae (Araneae, Mygalomorphae): a clarification

Bionomina ◽  
2021 ◽  
Vol 24 (1) ◽  
Author(s):  
RAINER BREITLING
Keyword(s):  
19Th Century ◽  
Relevant Literature ◽  
Historical Context ◽  
Publication Date ◽  
Diverse Group ◽  
Early 19Th Century ◽  
The Family ◽  
Minority View ◽  
Case Based ◽  
Selection Of

The genus Theraphosa was established by Thorell (1870) as the type genus of the simultaneously published family Theraphosidae, the most diverse group of mygalomorph spiders. This authorship and publication date have long been accepted by the majority of authors. However, there has been a long-standing minority view that the genus name should be attributed to Walckenaer (1805), and the publication date of the family name changed to 1869.             A thought-provoking recent publication has examined this case. Based on a limited selection of the relevant literature, the authors struggled to make sense of their sources and prematurely concluded that the minority opinion might indeed be correct. They overlooked the potentially destabilising implications of this reattribution.             This paper revisits the evidence in the light of a much wider range of relevant publications, places it in its important historical context and, on the basis of the current rules of nomenclature, concludes that the traditional consensus has indeed been correct.                 Thus, Theraphosa Thorell, 1870 is the type genus of Theraphosidae Thorell, 1870 and a nomen protectum, while Theraphosa Schinz, 1823 is a nomen oblitum, mostly limited to the German textbook literature of the early 19th century. Teraphosa Eichwald, 1830 and Teraphosa Gistel, 1848 are junior synonyms of Avicularia Lamarck, 1818 (syn. nov.). Theraphosa Walckenaer, 1805 is a suprageneric name of the class-series (synonymous to Mygalomorphae) and not available at the genus level.

scholarly journals The Heritability of Mating Behaviour in a Fly and Its Plasticity in Response to the Threat of Sperm Competition

PLoS ONE ◽  
2014 ◽  
Vol 9 (2) ◽  
pp. e90236 ◽  
Author(s):  
Amanda Bretman ◽  
Anne Lizé ◽  
Craig A. Walling ◽  
Tom A. R. Price
Keyword(s):  
Sperm Competition ◽  
Mating Behaviour

scholarly journals The most prominent educational problems faced by teachers of Arabic language in the schools of education for middle-aged government in Riyadh: أبرز المشكلات التدريسية التي تواجه معلمي اللغة العربية في مدارس تعليم الكبار المتوسطة الحكومية بمدينة الرياض

2017 ◽  
Vol 1 (4) ◽  
Author(s):  
Abdul Aziz bin Othman Al Humeida
Keyword(s):  
Writing Skills ◽  
Arabic Language ◽  
Literacy Skills ◽  
Male Students ◽  
Educational Resource ◽  
Schools Of Education ◽  
Resource Center ◽  
The Family ◽  
Descriptive Method ◽  
Selection Of

The study aimed to identify the most prominent problems faced by teachers of Arabic language, and ways to address them. The researcher used the descriptive descriptive method. The study tool consisted of a questionnaire distributed to a sample of (55) all male students in the middle school for boys in Riyadh in the second semester of 1433-1434H. The teaching of the students is: The weakness of the student in the literacy skills, the obligations of the family learner do not help him to study. The most important problems related to the curricula are: the lack of curricula dedicated to the large student, the lack of participation in the selection of curricula, the lack of development and change constantly, not appropriate time to complete. The most important problems related to the environment are: There is no suitable library for adults, there is no suitable educational means, no furniture suitable for the age of the students, no educational resource center and a building of its own. There were no statistically significant differences at (α0.05) between the responses of the study members according to the following variables: qualification, experience. In the light of the results, the researcher made a number of recommendations: To promote the learner's knowledge of reading and writing skills, to take care of homework assignments, to develop special curricula for the great student and to involve the teacher in her selection; to create an appropriate library for adults;

scholarly journals Seleção de genótipos de batata-doce quanto à eficiência ao uso do fósforo em solos da região de cerrado

2013 ◽  
Vol 4 (4) ◽  
pp. 356-364
Author(s):  
Luziano Lopes Da Silva ◽  
Márcio Antônio Da Silveira ◽  
Rodrigo Ribeiro Fidelis ◽  
Rodrigo de Castro Tavares ◽  
Valéria Gomes Momenté ◽  
...  
Keyword(s):  
Experimental Design ◽  
Sweet Potato ◽  
Ipomoea Batatas ◽  
Block Design ◽  
Tuberous Root ◽  
Phosphorus Fertilization ◽  
Germplasm Bank ◽  
Randomized Block Design ◽  
The Family ◽  
Selection Of

The sweet potato (Ipomoea batatas (l.) Lam.) Lam) is a plant that produces tuberous root belonging to the family convolvulácea explored in practically all states of Brazil. The objective of this work was to select genotypes of the sweet potato as the efficiency of phosphorus use in cerrado soils with high and low availability of this nutrient. Were evaluated nine genotypes of sweet potato coming from the germplasm bank from the Federal University of the Tocantins, Brazil. The experimental design was in randomized block design with three replications being nine genotypes grown in two environments with low and high phosphorus availability, using doses of phosphorus fertilization from 20 and 120 kg ha-1 P2O5, applied at planting. To select genotypes suitable for environments proposed was used methodology for selection of the efficient use and response to phosphorus fertilization (efficiency and response). Genotype Amanda was classified as efficient and responsive, Barbara, Julia, Marcela and Carolina Vitoria as efficient, but not responsive and Livia, Duda, Ana Clara and Beatriz were classified as non-efficient, responsive but the absorption and utilization of phosphorus.

scholarly journals Analisis pendidikan kewirausahaan dalam menanamkan nilai-nilai kewirausahaan untuk re-generasi usaha keripik gadung

2021 ◽  
Vol 1 (8) ◽  
pp. 711-717
Author(s):  
Ginanjar Septiana Supardiansyah ◽  
Rizky Dwi Putri
Keyword(s):  
Sampling Method ◽  
Entrepreneurship Education ◽  
Phenomenological Approach ◽  
Business Owners ◽  
Educational Process ◽  
Business Owner ◽  
Purposive Sampling ◽  
Parents And Children ◽  
The Family ◽  
Selection Of

Abstract Entrepreneurship education can be said as an educational process that can be seen through the way parents educate and instill entrepreneurial values in children. The purpose of this study was to determine (1) entrepreneurial education applied by gadung chip business owners to their children, (2) entrepreneurial values instilled by gadung chips business owners to their children, (3) business regeneration of gadung chips business owners. This study uses qualitative research with a phenomenological approach. The selection of informants used the purposive sampling method by looking at several criteria that were considered in selecting informants, namely the criteria for the first informant were parents who had a gadung chip business that had been passed down for 2 to 3 generations, the criteria for the second informant were teenagers who would continue the business. fake chips. The techniques used in collecting this data are observation techniques, interview techniques, and documentation. To test the validity of the data, the data was checked by triangulation of sources to the informants' children. The results of the study are (1) The entrepreneurial values instilled by the gadung chip business owner are honesty, responsibility, discipline, hard work, courage. (2) Entrepreneurship education for the family of gadung chip owners is carried out by establishing closeness between parents and children, providing positive activities, creating a learning atmosphere, and parenting habits. (3) Entrepreneurship education by instilling entrepreneurial values in children produces results with evidence that children have been involved and helped develop the gadung chip business. Abstrak Pendidikan kewirausahaan dapat dikatakan sebagai suatu proses pendidikan yang dapat dilihat melalui cara orang tua dalam mendidik dan menanamkan nilai-nilai kewirausahaan pada diri anak. Tujuan penelitian ini adalah untuk mengetahui (1) Pendidikan kewirausahaan yang diterapkan oleh pemilik usaha keripik gadung kepada anaknya, (2) Nilai-nilai kewirausahaan yang ditanamkan oleh pemilik usaha keripik gadung kepada anaknya, (3) Regenerasi usaha pemilik usaha keripik gadung. Penelitian ini menggunakan penelitian kualitatif dengan jenis pendekatan fenomenologi. Pemilihan informan menggunakan metode purposive sampling dengan melihat beberapa kriteria yang menjadi pertimbangan dalam memilih informan, yaitu kriteria informan pertama adalah orang tua yang memiliki usaha keripik gadung yang sudah mengalami turun-temurun 2 sampai 3 generasi, kriteria informan kedua adalah anak remaja yang akan melanjutkan usaha keripik gadung. Teknik yang digunakan dalam mengumpulkan data ini adalah teknik observasi, teknik wawancara, dan dokumentasi. Untuk menguji keabsahan data dilakukan pengecekan data dengan triangulasi sumber kepada anak informan. Hasil penelitian adalah (1) Nilai-nilai kewirausahaan yang ditanamkan pemilik usaha keripik gadung yaitu kejujuran, tanggung jawab, disiplin, kerja keras, keberanian. (2) Pendidikan kewirausahaan pada keluarga pemilik keripik gadung dilakukan dengan cara yaitu menjalin kedekatan antara orang tua dan anak, memberikan kesibukan positif, menciptakan suasana belajar, kebiasaan pola asuh orang tua. (3) Pendidikan kewirausahaan dengan menanamkan nilai-nilai kewirausahaan kepada anak membuahkan hasil dengan bukti anak sudah ikut terlibat dan membantu mengembangkan usaha keripik gadung.

scholarly journals Dinamika Kemandirian Mahasiswa Perantauan

2021 ◽  
Vol 1 (3) ◽  
pp. 167
Author(s):  
Nadia Fauzia ◽  
Asmaran Asmaran ◽  
Shanty Komalasari
Keyword(s):  
Parenting Style ◽  
Sampling Technique ◽  
Research Approach ◽  
Overseas Students ◽  
Descriptive Research ◽  
Change Factors ◽  
The Family ◽  
Qualitative Descriptive ◽  
The Subject ◽  
Selection Of

The purpose of this study is to discuss the dynamics of the independence of UIN Antasari Banjarmasin students and what factors are behind the independence of UIN Antasari Banjarmasin students. The reason is because overseas there are changes in conditions and situations, so that students who leave will experience dynamics of independence. This type of research is a qualitative descriptive research approach. Selection of subjects using purposive sampling technique, which is based on the characteristics of the subject in accordance with the research objectives to be carried out. The object of this research is the dynamics of independence, the subject is 5 overseas students. Data collection techniques using interviews and observations. Based on the results of research that overseas students of UIN Antasari Banjarmasin need a process to be independent in living their lives overseas. That is because overseas there has been a change. Factors that influence the dynamics of independence of overseas students at UIN Antasari Banjarmasin are factors of parenting style, the order of children in the family, age and the education system in schools.

scholarly journals Novel Organization of Genes Involved in Prophage Excision Identified in the Temperate Lactococcal Bacteriophage TP901-1

1999 ◽  
Vol 181 (23) ◽  
pp. 7291-7297 ◽  
Author(s):  
Anne Breüner ◽  
Lone Brøndsted ◽  
Karin Hammer
Keyword(s):  
Basic Protein ◽  
Genetic Material ◽  
Gene Encoding ◽  
Low Frequencies ◽  
Uracil Phosphoribosyltransferase ◽  
Phage Integrase ◽  
The Family ◽  
Phage Protein ◽  
Selection Of

ABSTRACT In this work, the phage-encoded proteins involved in site-specific excision of the prophage genome of the temperate lactococcal bacteriophage TP901-1 were identified. The phage integrase is required for the process, and a low but significant frequency of excision is observed when the integrase is the only phage protein present. However, 100% excision is observed when the phage protein Orf7 is provided as well as the integrase. Thus, Orf7 is the TP901-1 excisionase, and it is the first excisionase identified that is used during excisive recombination catalyzed by an integrase belonging to the family of extended resolvases. Orf7 is a basic protein of 64 amino acids, and the corresponding gene (orf7) is the third gene in the early lytic operon. This location of an excisionase gene of a temperate bacteriophage has never been described before. The experiments are based on in vivo excision of specifically designed excision vectors carrying the TP901-1 attP site which are integrated intoattB on the chromosome of Lactococcus lactis. Excision of the vectors was investigated in the presence of different TP901-1 genes. In order to detect very low frequencies of excision, a method for positive selection of loss of genetic material based upon the upp gene (encoding uracil phosphoribosyltransferase) was designed, since upp mutants are resistant to fluorouracil. By using this system, frequencies of excision on the order of 10−5 per cell could easily be measured. The described selection principle may be of general use for many organisms and also for types of deletion events other than excision.

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