Subfamily hypostominae: similarities and differences in testicular structure of amazonian fish

BMC Zoology ◽  
2022 ◽  
Vol 7 (1) ◽  
Author(s):  
Ivana Kerly S. Viana ◽  
Gicelle M. F. S. ◽  
Juliana C. D. Pantoja ◽  
Renata S. Oliveira ◽  
Yanne A. Mendes ◽  
...  
Keyword(s):  
Final Phase ◽  
Amazonian Fish ◽  
The Family ◽  
Testicular Morphology ◽  
Nuclear Rotation ◽  
Ultrastructural Characteristics ◽  
Similarities And Differences ◽  
Principal Piece ◽  
Single Flagellum ◽  
Oval Shape

Abstract Background Hypostominae is a subfamily of the family Loricariidae that has a great diversity of species. Accordingly, testicular studies in fish can contribute to the phylogeny and taxonomy of species and to the comparison of reproductive aspects between species. Thus, this work aimed to characterize the testicular morphology and spermatogenesis of the Hypostominae species Baryancistrus xanthellus, Peckoltia oligospila and Hypancistrus zebra. Results B. xanthellus, P. oligospila and H. zebra had an anastomosed tubular type of testis. The germinal epithelium was continuous with unrestricted spermatogonia, and the proliferative, meiotic and spermiogenic phases were defined in all species. In the spermiogenic phase, spermatids were classified as initial, intermediate and final. Only in B. xanthellus in the final phase was there nuclear rotation. The sperm for the three species had a head with an oval shape and a single flagellum composed of the short midpiece, principal piece and end piece. B. xanthellus and P. oligospila showed a cylindrical flagellum and H. zebra showed projections that produced a flattened appearance. Conclusions On the basis testicular structure and ultrastructural characteristics of the germ cells, there was a greater relationship between B. xanthelus and P. oligospila, while H. zebra had particular characteristics. These aspects show that despite belonging to the same subfamily, the species have distinct biological characteristics.

scholarly journals Crystal Chemical Relations in the Shchurovskyite Family: Synthesis and Crystal Structures of K2Cu[Cu3O]2(PO4)4 and K2.35Cu0.825[Cu3O]2(PO4)4

Crystals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 807
Author(s):  
Ilya V. Kornyakov ◽  
Sergey V. Krivovichev
Keyword(s):  
Crystal Structure ◽  
Crystal Structures ◽  
Structural Complexity ◽  
Crystal Chemical ◽  
X Ray Diffraction ◽  
Complexity Measures ◽  
X Ray ◽  
The Family ◽  
Similarities And Differences ◽  
Related Compounds

Single crystals of two novel shchurovskyite-related compounds, K2Cu[Cu3O]2(PO4)4 (1) and K2.35Cu0.825[Cu3O]2(PO4)4 (2), were synthesized by crystallization from gaseous phase and structurally characterized using single-crystal X-ray diffraction analysis. The crystal structures of both compounds are based upon similar Cu-based layers, formed by rods of the [O2Cu6] dimers of oxocentered (OCu4) tetrahedra. The topologies of the layers show both similarities and differences from the shchurovskyite-type layers. The layers are connected in different fashions via additional Cu atoms located in the interlayer, in contrast to shchurovskyite, where the layers are linked by Ca2+ cations. The structures of the shchurovskyite family are characterized using information-based structural complexity measures, which demonstrate that the crystal structure of 1 is the simplest one, whereas that of 2 is the most complex in the family.

scholarly journals Renouncing the World and Taking Ordination

2021 ◽  
Vol 13 (2021/1) ◽  
Author(s):  
Krisztina Teleki
Keyword(s):  
20Th Century ◽  
Dominant Role ◽  
Family Members ◽  
Family Ties ◽  
The Family ◽  
The World ◽  
Monastic Life ◽  
History Of ◽  
Similarities And Differences ◽  
Written Sources

The 20th century brought different periods in the history of Mongolia including theocracy, socialism and democracy. This article describes what renouncing the world (especially the home and the family), taking ordination, and taking monastic vows meant at the turn of the 20th century and a century later. Extracts from interviews reveal the life of pre-novices, illustrating their family backgrounds, connections with family members after ordination, and support from and towards the family. The master-disciple relationship which was of great significance in Vajrayāna tradition, is also described. As few written sources are available to study monks’ family ties, the research was based on interviews recorded with old monks who lived in monasteries in their childhood (prior to 1937), monks who were ordained in 1990, and pre-novices of the current Tantric monastic school of Gandantegčenlin Monastery. The interviews revealed similarities and differences in monastic life in given periods due to historical reasons. Though Buddhism could not attain its previous, absolutely dominant role in Mongolia after the democratic changes, nowadays tradition and innovation exist in parallel.

scholarly journals The identification of pika and hare through tricho-taxonomy (Mammalia: Lagomorpha)

2019 ◽  
Vol 11 (10) ◽  
pp. 14301-14308
Author(s):  
Manokaran Kamalakannan ◽  
Kailash Chandra ◽  
Joy Krishna De ◽  
Chinnadurai Venkatraman
Keyword(s):  
High Resolution ◽  
Cross Section ◽  
Guard Hair ◽  
Key Characteristics ◽  
The Family ◽  
Family Level ◽  
The Cross ◽  
Level Identification ◽  
Oval Shape

The macroscopic and microscopic characters of dorsal guard hairs of Indian lagomorphs (four species of pikas and three species of hare) are described; the cuticular and medullary characters are similar between the species studied.  The cuticular and medullary characters, however, are dissimilar between the family Ochotonidae and Leporidae.  The cross-section of hair of the species had shown two identical shapes between the family Ochotonidae and Leporidae.  The cross-section was observed as an oval shape in all the four ochotonid species, whereas there was a dumb-bell shape in all three leporid species.  The hair of the Indian lagomorphs can easily be differentiated up to the family level on the basis of their unique cuticula, medulla and cross-section of the dorsal guard hair.  The high-resolution microphotographs and key characteristics of hair that are presented here can be used as an appropriate reference for family-level identification of Indian lagomorphs.

Complementary description of Africoseius lativentris and placement of Africoseius in Podocinidae (Acari, Mesostigmata) based on molecular and morphological evidences

2019 ◽  
Vol 24 (10) ◽  
pp. 2369-2394 ◽  
Author(s):  
Diana Rueda-Ramírez ◽  
Jandir C. Santos ◽  
Nazer Famah Sourassou ◽  
Peterson R. Demite ◽  
Andrés Puerta-gonzález ◽  
...  
Keyword(s):  
Taxonomic Position ◽  
Phylogenetic Study ◽  
Similar Data ◽  
Free Living ◽  
Paulo State ◽  
Rdna Sequences ◽  
The Family ◽  
28S Rdna Sequences ◽  
Similarities And Differences ◽  
Longitudinal Extension

Morphological details of specimens collected from several localities in Brazil and identified as Africoseius lativentris (Karg 1982) are provided. The taxonomic position of Africoseius Krantz, 1962 has been debated over the years, with repeated changes in its familial placement. A phylogenetic study based on 18S and 28S rDNA sequences of the Brazilian population of A. lativentris collected at Jaboticabal, São Paulo State, and similar data of 70 taxa representing 11 families of Gamasina indicated that Africoseius is a member of the well-supported Podocinidae (sensu Lindquist et al. 2009) clade. The main morphological similarities and differences between Africoseius and the group of species until now placed in Podocinidae sensu Lindquist et al. (2009) are listed. Apomorphic characteristics uniting those taxa include the hypotrichous condition of tibia I (eight and nine setae instead of ten or more in other free-living Gamasina) and the insertions of av2 and pv2, considerably more distal on tarsi II and III than in the majority of the free-living Gamasina. Within Podocinidae, a new subfamily, Africoseiinae, is proposed, based on uniquely apomorphic characteristics of the setae ad4 and pd4 (sensu  Evans 1969) of tarsi II–IV absent, and setae av4 and pv4 of same basitarsi long, incurved and close to each other and to a posterior longitudinal extension of the peripodomeric suture and on the attenuated form of the lateral (rather than the medial) hypostomatic setae. This subfamily is currently represented by Africoseius areolatus Krantz and Africoseius lativentris (Karg 1982), while all other presently known species of the family are now placed in the subfamily Podocininae.

Scanning electron microscopy of basidiospores of species of Strobilomycetaceae

1971 ◽  
Vol 49 (8) ◽  
pp. 1259-1261 ◽  
Author(s):  
Larry F. Grand ◽  
Royall T. Moore
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
North American ◽  
North American Species ◽  
Surface Features ◽  
The Family ◽  
Similarities And Differences ◽  
Scanning Electron

Basidiospores of 13 North American species of Strobilomycetaceae were examined by scanning electron microscopy. Similarities and differences of surface features among species are discussed in relation to their possible role in the taxonomy of the family.

Psychotherapy in Eating Disorders

1977 ◽  
Vol 22 (3) ◽  
pp. 102-108 ◽  
Author(s):  
H. Bruch
Keyword(s):  
Eating Disorders ◽  
Anorexia Nervosa ◽  
Severe Malnutrition ◽  
Developmental Factors ◽  
Early Experiences ◽  
Number Of Patients ◽  
The Family ◽  
Similarities And Differences ◽  
Early Developmental

This paper emphasizes that neither obesity nor severe malnutrition represents a uniform clinical psychiatric picture. The therapist must always pay attention to and integrate the various factors involved in eating disorders such as the underlying personality problems, resolution of the interactional conflicts within the family and correction of the abnormal nutritional states. The similarities and differences of both obesity and anorexic states are described. Primary or typical anorexia nervosa is differentiated from the atypical kinds. The importance of early developmental factors of how the child differentiates inner and outer stimuli, the appropriate or inappropriate responses to these and the manner in which these early experiences later affect somatic, social and psychological self concepts are discussed. Various parameters and modalities of treatment are described based on the author's long-term experiences with a large number of patients.

Attitudes towards Randomized Control Group Experimental Designs in the Field of Community Welfare

1979 ◽  
Vol 44 (3_suppl) ◽  
pp. 1207-1213 ◽  
Author(s):  
J. M. Innes
Keyword(s):  
Juvenile Offenders ◽  
Control Group ◽  
Welfare Programs ◽  
Community Based ◽  
Family Unit ◽  
Program Administrator ◽  
The Family ◽  
Randomized Control ◽  
Similarities And Differences ◽  
Negative Side Effects

Subjects read a report describing an experiment in which juvenile offenders were to be randomly allocated either to the usual system of treatment, namely, institutionalization, or to a community-based treatment using family therapy to facilitate the communication of problems within the family unit. Generally, subjects reacted favourably to the hypothetical program, perceiving it to be scientific and morally justified. One variable which influenced reaction was the possible negative side effects of the method of therapy. When such effects were explicitly stated in the accounts subjects were less favourable to the program and judged the program administrator to be less competent. Similarities and differences between the present study and a comparable one by Hillis and Wortman (1976) which used a medical experiment as an issue are discussed, together with recommendations for administrators who wish to mount community welfare programs.

scholarly journals Influence of children in real estate family purchase decision-making context

2020 ◽  
Vol 18 (3) ◽  
pp. 211-217
Author(s):  
I. Kancheva
Keyword(s):  
Decision Making ◽  
Real Estate ◽  
Purchase Decision ◽  
Decision Making Process ◽  
Final Phase ◽  
Convenience Sample ◽  
Frequency Distributions ◽  
The Real Estate ◽  
Paired Samples ◽  
The Family

Purpose: Children play a significant role as active participants in different markets through their own spending power. They are also able to exert considerable influence – explicit or implicit - over other family members’ consumer behavior. The combination of various spatial, structural, financial and practical aspects place the purchase of a real estate among the most complex for the family. The objective of the present paper is to reveal the degree and form of children’s influence throughout family real estate purchase decision-making process. Methods: This paper represents the results of an empirical study focused on parental perceptions of children’s influence in a family real estate purchase. Data were gathered using a convenience sample of 286 respondents – 156 men and 130 women from different Bulgarian families. Frequency distributions, analysis of variance, paired samples and independent samples t-test were applied for the aims of the analysis. Results: Children are found to exert moderate indirect influence throughout the family real estate purchase. They are most influential in the final phase of the real estate purchase decision-making process. Although high influence scores are detected in some attributive decisions, children are found least influential over choices related to technical and financial aspects of the purchase.

scholarly journals Family Business in Vietnam and in Poland: Review of Characteristics and Trends of Development

2019 ◽  
Vol 54 (6) ◽  
Author(s):  
Nguyen Hoang Tien ◽  
Ho Thien Thong Minh ◽  
Nguyen Minh Ngoc ◽  
Vo Kim Nhan
Keyword(s):  
Comparative Analysis ◽  
Family Business ◽  
High Performance ◽  
Theoretical Framework ◽  
Business Activity ◽  
The Family ◽  
Management Literature ◽  
Similarities And Differences

Enterprise and entrepreneurship are well-known phenomena that have their history development of over 300 years. However, in relation to the family business they are still not well explored in the literature of management. Based on the overview of management literature, this article is an attempt to construct a theoretical framework for the purpose of comparative analysis of family business and entrepreneurship issues in Poland and in Vietnam. As a result, their similarities and differences are revealed in order to propose adequate solutions and recommendations for business and authority to support and promote this specific business activity towards their prosperity and high performance.

scholarly journals Identification and Full Characterisation of Two Novel Crustacean Infecting Members of the Family Nudiviridae Provides Support for Two Subfamilies

Viruses ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1694
Author(s):  
Kelly S. Bateman ◽  
Rose Kerr ◽  
Grant D. Stentiford ◽  
Tim P. Bean ◽  
Chantelle Hooper ◽  
...  
Keyword(s):  
High Throughput Sequencing ◽  
Phylogenetic Analyses ◽  
Carcinus Maenas ◽  
International Committee ◽  
Shore Crab ◽  
Cell Nuclei ◽  
Crangon Crangon ◽  
The Family ◽  
Ultrastructural Characteristics ◽  
Core Genes

Multiple enveloped viruses with rod-shaped nucleocapsids have been described, infecting the epithelial cell nuclei within the hepatopancreas tubules of crustaceans. These bacilliform viruses share the ultrastructural characteristics of nudiviruses, a specific clade of viruses infecting arthropods. Using histology, electron microscopy and high throughput sequencing, we characterise two further bacilliform viruses from aquatic hosts, the brown shrimp (Crangon crangon) and the European shore crab (Carcinus maenas). We assembled the full double stranded, circular DNA genome sequences of these viruses (~113 and 132 kbp, respectively). Comparative genomics and phylogenetic analyses confirm that both belong within the family Nudiviridae but in separate clades representing nudiviruses found in freshwater and marine environments. We show that the three thymidine kinase (tk) genes present in all sequenced nudivirus genomes, thus far, were absent in the Crangon crangon nudivirus, suggesting there are twenty-eight core genes shared by all nudiviruses. Furthermore, the phylogenetic data no longer support the subdivision of the family Nudiviridae into four genera (Alphanudivirus to Deltanudivirus), as recently adopted by the International Committee on Taxonomy of Viruses (ICTV), but rather shows two main branches of the family that are further subdivided. Our data support a recent proposal to create two subfamilies within the family Nudiviridae, each subdivided into several genera.

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