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Tytuł:
A Morphogenetic Description of Thigmokeronopsis stoecki Shao et al., 2008 (Ciliophora, Hypotricha) and a Comparison with Members of the Family Pseudokeronopsidae
Autorzy:
Chen, Xumiao
Li, Jiqiu
Hu, Xiaozhong
Shao, Chen
Al-Farraj, Saleh A.
Al-Rasheid, Khaled A. S.
Powiązania:
https://bibliotekanauki.pl/articles/763473.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Tematy:
Hypotrichs, ontogenesis, Pseudokeronopsidae, Thigmokeronopsis
Opis:
The urostylid family Pseudokeronopsidae Borror and Wicklow, 1983 was considered to be a well-outlined taxon. Nevertheless, recent evidence, including morphological, ontogenetic, and molecular information, has consistently revealed the polyphyly of this family. In the present work, a new population of Thigmokeronopsis stoecki Shao et al., 2008 was found and its binary divisional process was described for the first time. In addition, the morphogenetic features of Thigmokeronopsis species and all the other pseudokeronopsids, for which detailed ontogenetic data are available, were rechecked and compared. This reveals that: (1) the ontogenetic process of T. stoecki corresponds well with its congeners T. jahodai and T. rubra except for the macronuclear behavior; (2) Apokeronopsis and Thigmokeronopsis share a similar ontogenetic mode despite of the differences in the number and origin of their buccal cirri; (3) most pseudokeronopsids share the same pattern in the origins of their oral primordia and fronto-ventral-transverse cirral anlagen, except for Pseudokeronopsis similis, which may not be a valid member of the family Pseudokeronopsidae.
Źródło:
Acta Protozoologica; 2013, 52, 2
1689-0027
Pojawia się w:
Acta Protozoologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zmiany tempa rozwoju w ontogenezie człowieka i metody jego badania
Changes in the growth rate during ontogenesis and methods of its investigation
Autorzy:
Siniarska, Anna
Wolański, Napoleon
Powiązania:
https://bibliotekanauki.pl/articles/1817717.pdf
Data publikacji:
2005-12-31
Wydawca:
Uniwersytet Kardynała Stefana Wyszyńskiego w Warszawie
Tematy:
antropologia
ortogeneza
człowiek
anthropology
ontogenesis
human
Opis:
The problem of acceleration of growing processes during childhood and adolescence has been considered for a long time. The observations on this subject date back to the 19th century, however the attempts to summarize this phenomenon were dated to the 20th century. At the beginning of the 20th century Stratz, distinguishing the period of early and late childhood, had mentioned about three periods of deceleration and two periods of acceleration of growing processes. In 1930 also Boas identified the pubertal spurt. Ones of the first longitudinal studies had been organized in Krakow by Talko-Hryncewicz and continued in 1919-32. The results had been elaborated by Jasicki in 1934-48 and he revealed that there are two periods of acceleration of growing processes.In Poland this acceleration in growth had been called “the maximal height velocity.” The growth spurt at the end of childhood (around 7 years) has been pointed out by many authors in the 1930s, and in 1947 Tanner called it the mid-growth spurt. In 1961 Wolański pointed out that there are several growth spurts in childhood and called them pre (school) spurts. Consequently, in 1962 he had distinguished pubertal spurts for many somatic characteristics, and in 1964 – at least two pubertal spurts in height. Wolański had been analyzing the age at pubertal spurt followed by the age at menarche in rural and urban girls and concluded that these events are further apart if the pubertal spurt occurs later. The further analysis of these phenomena had been postponed because of the unfortunate statistical methods which presented data as mathematically smoothed growth curves and many details of individual growth patterns have been eliminated.Only two last decades the daily and monthly studies of growth processes have returned to favor, and the relationship between the rate and age at prepubertal and pubertal spurts has been studied again. In about 1980 the growth spurt at the turn of childhood and juvenile periods was again under study, but only during the last decade several growth spurts have been manifested. The number of prepubertal growth spurts has a very important impact on age and velocity of the pubertal spurt. If the number of prepubertal spurs is grater, the pubertal spurt occurs later and is less manifested. There are still many controversies according to the age of pubertal spurt and final body height. It may be similar to the relationship between menarche and final body height. It is observed that between populations there is a negative correlation between age at menarche and adult height, whereas between women within the population this correlation is positive (Wolański 1979).
Źródło:
Studia Ecologiae et Bioethicae; 2005, 3, 1; 43-81
1733-1218
Pojawia się w:
Studia Ecologiae et Bioethicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Życie człowieka w semiotyce koloru na przykładzie języka polskiego i rosyjskiego (część II)
Human life in colour semiotics exemplified by Polish and Russian language (Part II)
Autorzy:
Narloch, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/482161.pdf
Data publikacji:
2019-09-30
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:
colour
time
metaphor
human ontogenesis
phraseologism
Opis:
In the contemporary linguistic research, the colour system occupies a special position. Today’s culture space is supersaturated with colours, which are important semiotic components of human functioning and their relationships with other people. This paper attempts to describe colour semiotics from the point of view of the human development period. The author tries to determine whether colours can also determine the age frame of a person. First, the relationship between colours and time is analysed. The suggested description of the stages of life through the colour spectrum allows answering the question of how the respective stages of human life are determined by the colours assigned to them by the culture.
Źródło:
Acta Polono-Ruthenica; 2019, 3, XXIV; 35-44
1427-549X
Pojawia się w:
Acta Polono-Ruthenica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Życie człowieka w semiotyce koloru na przykładzie języka polskiego i rosyjskiego (część I)
Human life in colour semiotics exemplified by Polish and Russian language (Part I)
Autorzy:
Narloch, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/482402.pdf
Data publikacji:
2018-09-30
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:
colour
time
metaphor
human ontogenesis
phraseologism
Opis:
In the contemporary linguistic research, the colour system occupies a special position. Today’s culture space is supersaturated with colours, which are important semiotic components of human functioning and their relationships with other people. This paper attempts to describe colour semiotics from the point of view of the human’s development period. The author tries to find an answer to the question whether colours can also determine the age frame of a person. First, the relationship between colours and time is analysed. The suggested description of the stages of life through the colour spectrum shall allow answering the question how the respective stages of human life are determined by the colours assigned to them by the culture.
Źródło:
Acta Polono-Ruthenica; 2018, 3, XXIII; 89-98
1427-549X
Pojawia się w:
Acta Polono-Ruthenica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An Analysis of Sports Career Development in the 400-metre Dash
Autorzy:
Pietrzak, Michał
Iskra, Janusz
Dziadek, Bartosz
Gwiazdoń, Paweł
Powiązania:
https://bibliotekanauki.pl/articles/2159494.pdf
Data publikacji:
2021-12-31
Wydawca:
Politechnika Opolska. Wydział Wychowania Fizycznego i Fizjoterapii
Tematy:
400m
ontogenesis
sports career development
Opis:
One of the indicators of an optimally conducted training process is the athlete's achievement of sports success in all age categories. The analysis of sports career development is helpful in determining the periods of maximizing and maintaining sports results, but also in choosing the development path leading to the achievement of top-level results at the senior age. The aim of the study was to assess the development of sports championship in the 400-metre dash, comprising sports careers of 400 m medalists of the World Cadet and Junior Championships and European Junior Championships in the most important sports events in the senior age category, namely the European Championships, World Athletics Indoor Championships, World Championships, and the Olympic Games. The analysis involved a group of 69 male and 69 female medalists of the European Junior Championships, 27 male and 27 female medalists of the World Youth Junior Championships as well as a group of 48 male and 48 female medalists of the World Junior Championships in the 400 m. The research revealed that from 4% to 7% of the World Cadet Championships medalists and 1-3% of the male and 4-6% of the female medalists of the European Junior Championships achieved their highest sports success by winning medals at the World Championships and the Olympic Games. 6% to 10% of the studied World Junior Championships male medalists were successful in the World Championships. Among the World Championships female medalists, 12% won medals at the World Athletics Indoor Championships, 6% won medals at the World Championships, and 2% won the Olympic Games medals.
Źródło:
Journal of Physical Education & Health - Social Perspective; 2021, 10, 18; 43-51
2084-7971
Pojawia się w:
Journal of Physical Education & Health - Social Perspective
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zaktualizowana chronologia i metryka poziomowej periodyzacji ontogenezy
Updated chronology and metrics in multi-level periodization of ontogenesis
Autorzy:
Karandashev, Yuri
Powiązania:
https://bibliotekanauki.pl/articles/514195.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
ontogeneza
chronologia ontogenezy
metryka ontogenezy
periodyzacja rozwoju
poziomowa periodyzacja ontogenezy
ewolucyjna koncepcja ontogenezy
ontogenesis
chronology of ontogenesis
metrics of ontogenesis
way of dividing of life
into periods
periodization of ontogenesis
multi-level periodization of development
evolutionary
theory of development
Opis:
Centralnym zagadnieniem psychologii rozwoju, jak również i całej psychologii, jest periodyzacja ontogenezy. Nie tylko podział życia na poszczególne okresy, lecz także utworzenie teorii, która by wyjaśniała, dlaczego życie indywidualne dzieli się na okresy w pewien sposób. Tylko mając podobną teorię, można stawiać pytania dotyczące długości okresów rozwojowych i ich granic. Rozwiązaniu tego drugiego zadania poświęcony jest ten artykuł.
The central problem of development psychology, and psychology in general, is a way of dividing of life into periods called in European tradition as a periodization of ontogenesis. Nor just the division of life into separate periods, but the creation of a theory that would explain why the individual life is divided into periods in a certain way. Only with such a theory, it is possible to wonder about the age periods and the duration of their borders. The solution of second problem appears as an objective of this article.
Źródło:
Psychologiczne Zeszyty Naukowe; 2018, 1; 65-92
2451-1420
Pojawia się w:
Psychologiczne Zeszyty Naukowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chronologia i metryka rozwoju ontogenetycznego
Chronology and metrics of ontogenetic development
Autorzy:
Karandashev, Yuri
Powiązania:
https://bibliotekanauki.pl/articles/514280.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
ontogeneza
chronologia ontogenezy
metryka ontogenezy
periodyzacja rozwoju
poziomowa periodyzacja ontogenezy
ewolucyjna koncepcja ontogenezy
ontogenesis
chronology of ontogenesis
metrics of ontogenesis
way of dividing of life into periods
periodization of ontogenesis
multi-level periodization of development
evolutionary theory of development
Opis:
Centralnym zagadnieniem psychologii rozwoju, jak również i całej psychologii, jest periodyzacja ontogenezy. Nie tylko podział życia na poszczególne okresy, a utworzenie teorii, która by wyjaśniała, dlaczego życie indywidualne dzieli się na okresy w pewien sposób. Tylko mając podobną teorię, można stawiać pytania dotyczące długości okresów rozwojowych i ich granic. Rozwiązaniu tego drugiego zadania poświęcony jest ten artykuł.
The central problem of development psychology, and psychology in general, is a way of dividing of life into periods called in European tradition as a periodization of ontogenesis. Nor just the division of life into separate periods, but the creation of a theory that would explain why the individual life is divided into periods in a certain way. Only with such a theory, it is possible to wonder about the age periods and the duration of their borders. The solution of second problem appears as an objective of this article
Źródło:
Psychologiczne Zeszyty Naukowe; 2016, 1; 101-124
2451-1420
Pojawia się w:
Psychologiczne Zeszyty Naukowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ujednolicona chronologia i metryka rozwoju ontogenetycznego
Unified chronology and metrics of ontogenetic development
Autorzy:
Karandashev, Yuri
Powiązania:
https://bibliotekanauki.pl/articles/1387884.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
ontogeneza
chronologia ontogenezy
metryka ontogenezy
periodyzacja rozwoju
poziomowa periodyzacja ontogenezy
ewolucyjna koncepcja ontogenezy
ontogenesis
chronology of ontogenesis
metrics of ontogenesis
way of dividing of life into periods
periodization of ontogenesis
multi-level periodization of development
evolutionary theory of development.
Opis:
Centralnym zagadnieniem psychologii rozwoju, jak również i całej psychologii, jest periodyzacja ontogenezy. Nie tylko podział życia na poszczególne okresy, ale utworzenie teorii, która by wyjaśniała, dlaczego życie indywidualne dzieli się na okresy w pewien sposób. Tylko mając podobną teorię, można stawiać pytania dotyczące długości okresów rozwojowych i ich granic. Rozwiązaniu tego drugiego zadania jest poświęcony ten artykuł.
The central problem of development psychology, and psychology in general, is a way of dividing of life into periods called in european tradition as a periodization of ontogenesis. Nor just the division of life into separate periods, but the creation of a theory that would explain why the individual life is divided into periods in a certain way. Only with such a theory, it is possible to wonder about the age periods and the duration of their borders. The solution of second problem appears as an objective of this article.
Źródło:
Psychologiczne Zeszyty Naukowe; 2017, 2; 11-134
2451-1420
Pojawia się w:
Psychologiczne Zeszyty Naukowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Infraciliature and Cell Division of the Little Known Freshwater Ciliate Uroleptus cf. magnificus (Kahl, 1932) Olmo, 2000 (Hypotricha, Uroleptidae), and List of Published Names in Uroleptus Ehrenberg, 1831 and Paruroleptus Wenzel, 1953
Autorzy:
He, Wei
Shao, Chen
Shi, Xinbai
Berger, Helmut
Powiązania:
https://bibliotekanauki.pl/articles/763702.pdf
Data publikacji:
2011
Wydawca:
Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Tematy:
China, Ciliophora, Dorsomarginalia, morphogenesis, ontogenesis, Rigidothrix, Stichotrichia
Opis:
In 1988, we found a large (250–400 × 80–150 μm in protargol preparations) Uroleptus-like hypotrich in a freshwater pond in Harbin, China. We studied the morphology of non-dividers and the cell division using protargol impregnation. Since we disregarded live observations and due to the lack of a modern revision of the uroleptids, a final identification was not possible. A detailed comparison with the most similar limnetic Uroleptus-like hypotrichs and with Rigidothrix goiseri revealed that the Chinese population is very likely identical with Uroleptus magnificus [basionym Holosticha (Paruroleptus) magnificus Kahl, 1932], a very rare species possibly confined to limnetic, stagnant water bodies of the holarctic region. Besides the large size, main features of U. cf. magnificus are: (i) about 80 adoral membranelles; (ii) three or four inconspicuous transverse cirri; (iii) 5–8 dorsomarginal kineties; (iv) the oral primordium originates de novo left of the postoral midventral cirri; (v) the frontal-ventral-transverse cirri anlagen of the proter and the opisthe originate via primary primordia; (vi) the left frontal cirrus of the proter originates from the middle portion of the disorganizing parental paroral; (vii) the parental endoral becomes the undulating membrane anlage for the proter; and (viii) the frontoterminal cirri originate in the plesiomorphic manner, that is, from the rearmost anlage. A compilation reveals that 59 species, subspecies, etc. have been described in or assigned to Uroleptus and Paruroleptus, but only about 50% of them seem to be true uroleptids. Many species of this predominantly limnetic group are little known.
Źródło:
Acta Protozoologica; 2011, 50, 3
1689-0027
Pojawia się w:
Acta Protozoologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Two Oxytrichids from the Ancient Lake Biwa, Japan, with Notes on Morphogenesis of Notohymena australis (Ciliophora, Sporadotrichida)
Autorzy:
Hu, Xiaozhong
KUSUOKA, Yasushi
Powiązania:
https://bibliotekanauki.pl/articles/763654.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Tematy:
Apoamphisiella, freshwater ciliate, infraciliature, Notohymena, ontogenesis, Stichotrichia
Opis:
Two oxytrichid freshwater ciliates, Apoamphisiella tihanyiensis (Gellért and Tamás, 1958) Foissner, 1997 and Notohymena australis (Foissner and O’Donoghue, 1990) Berger, 1999, were recorded for the first time in Lake Biwa, a 4-million-year-old lake located at the Shiga Prefecture in Japan. Their morphology was investigated based on observations of live and protargol-impregnated material. Based on the present observation and previous descriptions, A. tihanyiensis is characterized by having an elliptical body shape, yellowish cortical granules, two long frontoventral rows, enlarged frontal and transverse cirri, highly variable numbers of frontoventral, and postoral ventral cirri, and six to 11 caudal cirri arranged in three short rows. New data confirm the presence of pretransverse ventral cirri in this species. Morphologically, N. australis differs from its congeners in having the following combination of characters: greenish cortical granules, the cirrus V/2 located slight anterior to the leftmost transverse cirrus, dorsal kinety 3 almost as long as body, and seven to 10 caudal cirri arranged in three short rows. Morphogenesis in N. australis shows the same pattern as in N. apoaustralis but differs from that of other congeners in the origin of oral primordium and the formation of more than just three caudal cirri.
Źródło:
Acta Protozoologica; 2015, 54, 2
1689-0027
Pojawia się w:
Acta Protozoologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Morphological and Morphogenetic Redescriptions and SSU rRNA Gene-based Phylogeny of the Poorly-known Species Euplotes amieti Dragesco, 1970 (Ciliophora, Euplotida)
Autorzy:
LIU, Mingjian
FAN, Yangbo
MIAO, Miao
Hu, Xiaozhong
Al-Rasheid, Khaled A. S.
Al-Farraj, Saleh A.
Ma, Honggang
Powiązania:
https://bibliotekanauki.pl/articles/763760.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Tematy:
Euplotidae, fresh water ciliate, ontogenesis, phylogenetic analysis, taxonomy
Opis:
This paper investigates the morphology and morphogenesis during binary fission of a Chinese population of Euplotes amieti Dragesco, 1970, a fresh water form which has previously not been well defined. This organism is morphologically very similar to the well-known Euplotes eurystomus but differs from the latter both in the number of dorsal kineties and the molecular data. According to the information obtained, it is characterized by a combination of features including nine frontoventral cirri, ca. 60 membranelles, 12–15 dorsal kineties, a macronucleus in the shape of the number 3, and a ‘double-eurystomus’ type of silverline system. Its morphogenesis proceeds broadly in the same pattern as in its congeners. In this study, the SSU rRNA gene was sequenced for the first time, and phylogenetic analyses indicated that it is closely related to the eurystomus-aediculatus-woodruffi- complex. Considering the extreme similarities in morphology between E. amieti and E.eurystomus, we believe that the four sequences (four isolates) under the name of Euplotes eurystomus (No. FR873716; FR873717; EF193250; AJ310491 deposited in GenBank) are very likely from misidentified material; that is, they represent different populations of Euplotes amieti.
Źródło:
Acta Protozoologica; 2015, 54, 3
1689-0027
Pojawia się w:
Acta Protozoologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Quality of life and physical activity of kindergarden teachers
Autorzy:
Brodáni, Jaroslav
Žišková, Ivana
Powiązania:
https://bibliotekanauki.pl/articles/1031773.pdf
Data publikacji:
2015
Wydawca:
PPHU Projack Jacek Wąsik
Tematy:
activity
age
kindergarden
life quality
ontogenesis
relations
teachers
Opis:
The contribution presents the relationship between the frequency of physical activity during the week and fields of life quality of kindergarden teachers in three mature parts. In the research took part kindergarden teachers from Slovakia (n = 211) who were divided into groups according to their ontogenesis. The life quality was observed with a modified questionnaire SQUALA and the physical activity level frequency during the week. The data is presented by descriptive characteristics (n, M, SD) and statistic importance of differences, let us say relationships which are measured by non-parametric methods (W, U, rs), by the importance level (p<0.05; p<0.10). The results showed the most numerous correlations between the physical activity during the week and fields of life quality of teachers in age group from 36-46 years (middle mature) who do the physical activity M: 3.250 during the week by SD: 2.761. In this group were proved positive correlations with the field of physical well-being (p<0.01), psychosocial well-being (p<0.01), material well-being (p<0.01), education (p<0.10), free time (p<0.05), appearance and property of things (p<0.01). Specially this age is characteristic by reaching the highest goals of physical and mental performance. In the groups of younger and older mature we do not find so many important relationships between the physical activity and some fields of life quality. In these groups we did not find any important correlations of physical activity with physical well-being where the group of young mature reached the same level of physical activity as the group of middle mature. The conclusions show the importance of physical activity in life of kindergarden teachers, they show some possibilities of influencing the life quality through the physical activities but also creating the optimal conditions possibilities to increase the life quality in social environment. The contribution is part of the Ministry of Education grant KEGA 014UKF-4/2013 Improving the quality and level of health of adolescents by means of physical activity in primary and secondary schools.
Źródło:
Physical Activity Review; 2015, 3; 11-21
2300-5076
Pojawia się w:
Physical Activity Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
THE DEVELOPMENT OF RESULTS IN 100M AND 400M SPRINT RACES IN ATHLETES AGED FROM 6 TO 100
Autorzy:
Iskra, Janusz
Pietrzak, Michał
Szczęsna, Monika
Gwiazdoń, Paweł
Powiązania:
https://bibliotekanauki.pl/articles/449251.pdf
Data publikacji:
2017
Wydawca:
Politechnika Opolska. Wydział Wychowania Fizycznego i Fizjoterapii
Tematy:
100m
400m
ontogenesis
sports career development
Opis:
The 100 m race is not only a sports discipline but also a way of assessing an athlete’s speed abilities. The run over the distance of 400 metres combines both speed and endurance (anaerobic) capacities. The purpose of the study was to evaluate the development of results in men's 100 and 400m sprint races, taking into account the best performance within the age from 6 to 100. By examining the course and the development of the world's leading sprinters’ careers, the authors took into consideration their best final results achieved each year. They were assigned to three research protocols that included age, successive years of starts, and the period before and after their personal best.The results are presented with arithmetic means and standard deviations (SD). In the comparative analysis of groups of runners over various distances (100 and 400m), the percentage value (%) of the result in relation to the world record over the given distance was chosen as a common element. The research has shown that the age range from 20 to 31 in the 100m race and 20 to 29 in the 400m run respectively, are the best periods for continuation of a sports career suitable for the shortest and longest sprint distance at the highest world level. The development of speed abilities up to the age of 14 is similar to the scale of their regression after the age of 35. Knowledge concerning the change in sports performance level in relation to age provides the opportunity to predict the periods of peak performance in a given sports discipline. This enables a rational and proper planning of the training process.
Źródło:
Journal of Physical Education & Health - Social Perspective; 2017, 6, 9; 27-38
2084-7971
Pojawia się w:
Journal of Physical Education & Health - Social Perspective
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Apogastrostyla rigescens (Kahl, 1932) gen. nov., comb. nov. (Ciliophora, Hypotricha): Morphology, Notes on Cell Division, SSU rRNA Gene Sequence Data, and Neotypification
Autorzy:
LI, Liqiong
HUANG, Jie
SONG, Weibo
SHIN, Mann Kyoon
AL-RASHEID, Khaled A. S.
BERGER, Helmut
Powiązania:
https://bibliotekanauki.pl/articles/763788.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Tematy:
China, ecology, Hemigastrostyla, infraciliature, ontogenesis, Spirotricha, Stichotrichia, Yellow Sea
Opis:
The morphology, the infraciliature, some stages of cell division and physiological reorganization, and the SSU rRNA gene sequence of the little-known marine 18-cirri hypotrich Tachysoma rigescens (Kahl, 1932) Borror, 1972 [basionym Oxytricha (Tachysoma) rigescens], isolated from mariculture waters near Qingdao, China, were investigated. This rare species is characterized, inter alia, by narrowly spaced, small, colourless cortical granules and several conspicuous ring-shaped structures in the cytoplasm. The caudal cirri and the simple dorsal kinety pattern (three bipolar kineties) are probably plesiomorphic traits within the Hypotricha, the composition of the adoral zone of the proter from new and parental membranelles, as well as the presence of two ‘extra’ cirri behind the right marginal row strongly suggest a misclassification in Tachysoma. The SSU rRNA gene sequence data indicate that T. rigescens branches off rather basally in the Hypotricha tree, which supports the hypothesis that the 18-cirri pattern occurred very early, probably already in the last common ancestor of the Hypotricha. A detailed survey of the early branching 18-cirri hypotrichs and similar taxa (e.g. Trachelostyla pediculiformis, Hemigastrostyla enigmatica, Protogastrostyla pulchra) reveals that for T. rigescens a new genus (Apogastrostyla gen. nov.) has to be established, because there are important differences, inter alia, in the dorsal infraciliature. Besides the type species, A. rigescens comb. nov., which seems to be confined to the northern hemisphere according to the sparse faunistic data, a second marine species, A. szaboi comb. nov. (basionym Hemigastrostyla szaboi), so far only twice recorded from the Antarctic region, can be included. The Chinese population is fixed as neotype to define the species objectively, because no type material of A. rigescens is present and the original type locality is not known. The species name Tachysoma multinucleate is emended: Tachysoma multinucleatum nom. corr.
Źródło:
Acta Protozoologica; 2010, 49, 3
1689-0027
Pojawia się w:
Acta Protozoologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Exploring the limits of morphospace: ontogeny and ecology of Late Visean ammonoids from the Tafilalt, Morocco
Autorzy:
Klug, C.
De Baets, K.
Korn, D.
Powiązania:
https://bibliotekanauki.pl/articles/22457.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
paleoecology
morphospace
ontogenesis
ecology
Late Visean
ammonoid
Ammonoidea
Morocco
Opis:
Early late Viséan ammonoid assemblages in Morocco are composed of diverse and well-preserved specimens. The material was found in a plain in the Tafilalt (eastern Anti-Atlas). Here, we describe mass-occurrences of juvenile specimens, in which subadult and adult specimens occur in low numbers. The juveniles of some species display a conch morphology that differs fundamentally from the adult stages. Accordingly, we emend the species diagnoses of Goniatites lazarus as well as Calygirtyoceras darkaouaense, introduce the species Entogonites bucheri sp. nov., and discuss possible ecological implications of the morphologic changes throughout ontogeny. In particular, we compare the changes in conch morphology through ontogeny in the light of Pareto Optimiality according to which the morphology of organisms would fill a polygon or polyhedron in morphospace. Data points in one of the vorteces of the polyhedron indicate optimisation for the corresponding task. Although shape is not a proof of function, it appears plausible that juvenile conchs were selected rather for compactness while adult conchs were positively selected for conchs with improved hydrodynamic properties. This appears plausible because at small conch diameters, swimming movements will not suffice for effective translocation and a planktonic mode of life is likely.
Źródło:
Acta Palaeontologica Polonica; 2016, 61, 1
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 56

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