scholarly journals Fluctuating Asymmetry in Ground Beetles (Coleoptera, Carabidae) and Conditions of Its Manifestation

Symmetry ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 1475
Author(s):  
Sukhodolskaya Raisa ◽  
Saveliev Anatoliy ◽  
Mukhametnabiev Timur ◽  
Eremeeva Natalia
Keyword(s):  
Environmental Factors ◽  
Data Base ◽  
Fluctuating Asymmetry ◽  
Anthropogenic Impact ◽  
Ground Beetles ◽  
Disturbing Factor ◽  
One Dimensional ◽  
Landscape Features ◽  
Species Specific ◽  
Vast Area

Fluctuating asymmetry (FA) is used to reveal environmental or genetic stress, but the results of some studies are inconsistent. We aimed to give some explanations of possible controversial conclusions, when FA was employed. We measured FA (one dimensional and one meristic traits) in the recognized bioindicators—ground beetles (Coleoptera, Carabidae). Beetles were sampled in a vast area (four provinces of Russia with the spectrum of the studied sites, which differed in anthropogenic impact, vegetation, and landscape features). On the basis of such measurements (4673 specimen) we created a data base. Subsequent ANOVA showed, that FA was species-specific (out of six species investigated it was expressed in five ones), sex-biased (males had higher levels of FA), and were affected practically by all environmental factors. Besides significant species–sex and factors–sex interactions were found. So, when employing FA as an indicator of stress, overall biological and ecological variation in species-indicator must be investigated before. Sometimes FA (or its absence) may not be due to pollution or another disturbing factor, but be the result of the effect of unaccounted but FA determinative factors.

scholarly journals Biotope Impact on Fluctuating Asymmetry Manifestation in Ground beetles (Coleoptera, Carabidae)

2020 ◽  
Author(s):  
Raisa A. Sukhodolskaya ◽  
Anatoliy A. Saveliev ◽  
Natalia I. Eremeeva ◽  
Nadezhda L. Ukhova ◽  
Tatyana A. Gordienko ◽  
...  
Keyword(s):  
Fluctuating Asymmetry ◽  
Negative Relationship ◽  
Ground Beetles ◽  
Forest Species ◽  
Data Set ◽  
Generalist Species ◽  
One Dimensional ◽  
Poecilus Cupreus ◽  
Different Types ◽  
Left And Right

In our study we used the data set on morphimetric traits in beetles species. It has been constantly replenishing for 20 years by the samples, received from different regions of Russia and abroad. In this case we have selected data on nine species for which the left and right sides had been measured and fluctuating asymmetry (FA) could be estimated. The samples were from 6 provinces of Russia and Belarus, which ranged in 3 degrees in latitude and 57 degrees in longitude and included more than 150 plots in different types of biotopes. FA was assessed according to the standard method in 5265 specimen in one dimensional trait and one - meristic. ANOVA showed that biotope, species and their interaction affected FA in both traits, that is different species reacted differently to biotope type. In uncommon biotopes (according to accepted in carabidology classification) FA was increased. In forest species the negative relationship between FA in dimensional and meristic traits in the range in biotopes was revealed. In those species only FA values were higher in males than in females. In generalist species FA varieв similarly in both sexes and in both traits being the highest in open biotopes. In eudomonant of arable lands biotopes – Poecilus cupreus – the highest values of FA were recorded in the meadows, being about equal in all types of crops.

scholarly journals Longitudinal zonation of larval Hydropsyche (Trichoptera: Hydropsychidae): abiotic environmental factors and biotic interactions behind the downstream sequence of Central European species

Hydrobiologia ◽  
2021 ◽  
Author(s):  
Márk Ficsór ◽  
Zoltán Csabai
Keyword(s):  
Environmental Factors ◽  
Biotic Interactions ◽  
Life Cycles ◽  
Longitudinal Distribution ◽  
Central European ◽  
European Species ◽  
Longitudinal Gradients ◽  
Species Specific ◽  
Behavioural Aspects ◽  
Abiotic Environmental Factors

AbstractThe aim of this review is to summarize the literature knowledge about how abiotic environmental factors and biotic interactions affect the sequentially overlapping longitudinal distribution of Central European species of the net-spinning freshwater caddisfly larvae of the genus Hydropsyche (Trichoptera: Hydropsychidae). In this relation, several physical and chemical parameters of water are discussed, as well as different species-specific traits, behavioural aspects and the interaction of coexisting species. Longitudinal gradients of river networks, especially annual temperature range, flow velocity and the particle size of suspended food material play a crucial role in forming the downstream succession of characteristic species, while increased levels of organic pollution, nutrients, salinity and heavy metals facilitates the presence of more tolerant ones. Several species-specific traits, such as respiration range, net-building frequency, head capsule size or optimal net-building velocity correlate with the position of a given species in the sequence. Coexistence of species with similar ecological demands in the overlapping zones of distribution is facilitated by differences in feeding and net-building habits, microhabitat preferences and staggering life cycles, but complicated at the same time by means of inter- and intraspecific territorial behaviour, such as fighting for the ownership of larval retreats or the practice of stridulation.

To open or to close: species-specific stomatal responses to simultaneously applied opposing environmental factors

2014 ◽  
Vol 202 (2) ◽  
pp. 499-508 ◽  
Author(s):  
Ebe Merilo ◽  
Indrek Jõesaar ◽  
Mikael Brosché ◽  
Hannes Kollist
Keyword(s):  
Environmental Factors ◽  
Stomatal Responses ◽  
Species Specific

scholarly journals Effects of environmental factors and landscape features on movement patterns of Florida black bears

2017 ◽  
Vol 98 (5) ◽  
pp. 1463-1478 ◽  
Author(s):  
Dana L Karelus ◽  
J Walter McCown ◽  
Brian K Scheick ◽  
Madelon van de Kerk ◽  
Benjamin M Bolker ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Urban Areas ◽  
Animal Movement ◽  
Movement Patterns ◽  
Black Bears ◽  
Temporal Scales ◽  
Commercial Development ◽  
Directed Movement ◽  
Landscape Features ◽  
Directed Paths

Abstract A greater understanding of how environmental factors and anthropogenic landscape features influence animal movements can inform management and potentially aid in mitigating human–wildlife conflicts. We investigated the movement patterns of 16 Florida black bears (Ursus americanus floridanus; 6 females, 10 males) in north-central Florida at multiple temporal scales using GPS data collected from 2011 to 2014. We calculated bi-hourly step-lengths and directional persistence, as well as daily and weekly observed displacements and expected displacements. We used those movement metrics as response variables in linear mixed models and tested for effects of sex, season, and landscape features. We found that step-lengths of males were generally longer than step-lengths of females, and both sexes had the shortest step-lengths during the daytime. Bears moved more slowly (shorter step-lengths) and exhibited less directed movement when near creeks, in forested wetlands, and in marsh habitats, possibly indicating foraging behavior. In urban areas, bears moved more quickly (longer step-lengths) and along more directed paths. The results were similar across all temporal scales. Major roads tended to act as a semipermeable barrier to bear movement. Males crossed major roads more frequently than females but both sexes crossed major roads much less frequently than minor roads. Our findings regarding the influence of landscape and habitat features on movement patterns of Florida black bears could be useful for planning effective wildlife corridors and understanding how future residential or commercial development and road expansions may affect animal movement.

scholarly journals SEX INVERSION IN CULTIVATED MUSSELS MYTILUS GALLOPROVINCIALIS LAM. (CRIMEA, BLACK SEA) UNDER INFLUENCE OF EXTERNAL ENVIRONMENTAL FACTORS

2018 ◽  
Vol 19 ◽  
pp. 26-31
Author(s):  
Natalya Chelyadina ◽  
Natalya Pospelova ◽  
Mark Popov ◽  
Ludmila Smyrnova ◽  
Irina Kharchuk ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Sex Ratio ◽  
Black Sea ◽  
Diesel Fuel ◽  
Hormonal Regulation ◽  
Anthropogenic Impact ◽  
Mytilus Galloprovincialis ◽  
The Black Sea ◽  
Sex Inversion ◽  
Anionic Detergents

In the last decade, there has been a shift in the sex ratio of the mussel Mytilus galloprovincialis in the Black Sea towards increase of males. In modern literature, focus is mainly on mechanisms of sex inheritance in mussels and hormonal regulation of the reproduction, and there is no information on sex inversion in M. galloprovincialis under the influence of environmental factors. The goal of this work is to establish the fact of sex change in mussels cultivated near the coast of Crimea under the influence of some external environmental factors. We establish that mussels change sex from female to male, but some specimens become hermaphrodites, with their fraction reaching 13%. Under unfavorable environmental conditions, mussel females change sex, and their mortality rises up to 69%. In water areas subject to anthropogenic impact, the proportion of sex inversion in the mollusks may be as high as 58%. The influence of various adverse   environmental factors on sex inversion in mussel females is unequal, and its strength decreases in the following order: diesel fuel > hypoxia > anionic detergents > starvation.

scholarly journals Metagenomic Shotgun Analyses Reveal Complex Patterns of Intra- and Interspecific Variation in the Intestinal Microbiomes of Codfishes

2020 ◽  
Vol 86 (6) ◽  
Author(s):  
Even Sannes Riiser ◽  
Thomas H. A. Haverkamp ◽  
Srinidhi Varadharajan ◽  
Ørnulf Borgan ◽  
Kjetill S. Jakobsen ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Gadus Morhua ◽  
Atlantic Cod ◽  
Interspecific Variation ◽  
Shotgun Sequencing ◽  
Intestinal Microbiome ◽  
Ecological Niches ◽  
Content Type ◽  
Evolutionary Trajectories ◽  
Species Specific

ABSTRACT The relative importance of host-specific selection or environmental factors in determining the composition of the intestinal microbiome in wild vertebrates remains poorly understood. Here, we used metagenomic shotgun sequencing of individual specimens to compare the levels of intra- and interspecific variation of intestinal microbiome communities in two ecotypes (NEAC and NCC) of Atlantic cod (Gadus morhua) that have distinct behavior and habitats and three Gadidae species that occupy a range of ecological niches. Interestingly, we found significantly diverged microbiomes among the two Atlantic cod ecotypes. Interspecific patterns of variation are more variable, with significantly diverged communities for most species’ comparisons, apart from the comparison between coastal cod (NCC) and Norway pout (Trisopterus esmarkii), whose community compositions are not significantly diverged. The absence of consistent species-specific microbiomes suggests that external environmental factors, such as temperature, diet, or a combination thereof, comprise major drivers of the intestinal community composition of codfishes. IMPORTANCE The composition of the intestinal microbial community associated with teleost fish is influenced by a diversity of factors, ranging from internal factors (such as host-specific selection) to external factors (such as niche occupation). These factors are often difficult to separate, as differences in niche occupation (e.g., diet, temperature, or salinity) may correlate with distinct evolutionary trajectories. Here, we investigate four gadoid species with contrasting levels of evolutionary separation and niche occupation. Using metagenomic shotgun sequencing, we observed distinct microbiomes among two Atlantic cod (Gadus morhua) ecotypes (NEAC and NCC) with distinct behavior and habitats. In contrast, interspecific patterns of variation were more variable. For instance, we did not observe interspecific differentiation between the microbiomes of coastal cod (NCC) and Norway pout (Trisopterus esmarkii), whose lineages underwent evolutionary separation over 20 million years ago. The observed pattern of microbiome variation in these gadoid species is therefore most parsimoniously explained by differences in niche occupation.

Learning About the Lives and Early Experiences of Notable Asian American Women: Productive Giftedness, Childhood Traits, and Supportive Conditions

2018 ◽  
Vol 41 (2) ◽  
pp. 160-192 ◽  
Author(s):  
Susan J. Paik ◽  
Shirlie Mae Mamaril Choe ◽  
Wendi J. Otto ◽  
Zaynah Rahman
Keyword(s):  
Environmental Factors ◽  
Asian American ◽  
Asian American Women ◽  
One Dimensional ◽  
American Women ◽  
Early Experiences ◽  
The Common ◽  
Leadership Opportunities ◽  
Learning And Achievement

Despite one-dimensional stereotypes and barriers experienced by Asian American women, many have achieved prominence. We know very little about these stories, their lives, or what helped them to achieve beyond expectations. Based on the Productive Giftedness Model, the article identifies the common traits and supportive conditions that influence their success. To help illustrate these experiences, the article highlights the lives of 10 notable Asian American women across diverse professions. These women displayed “productive giftedness” as girls; they were accomplished, determined, and skillful early on, which led to excellence, awards, and leadership opportunities. Many also had supportive conditions including the investment of one or more adults. Parents, teachers, and mentors can further enhance these opportunities for Asian American girls. These general principles can be learned and applied to other groups as well. Supporting individual, instructional, and environmental factors can influence learning and achievement for girls in the early and school years.

Labio-palatine Cleft, Morphological Substrate

2018 ◽  
Vol 69 (4) ◽  
pp. 1002-1005
Author(s):  
Cristian Romanec ◽  
Mariana Pacurar ◽  
Mioara Decusara ◽  
Monica Mihaela Scutariu ◽  
Delia Hinganu ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Congenital Abnormalities ◽  
Causative Factor ◽  
Common Type ◽  
Study Group ◽  
Disturbing Factor ◽  
Facial Region ◽  
Alveolar Cleft ◽  
Craniofacial Malformation ◽  
Functional Defects

Labio-palatin clefts are the most common type of craniofacial malformation encountered in practice and among the most common congenital abnormalities; it represent morphological and functional defects in newborns caused by genetically changes or environmental factors; those of the cervico-facial region have an increased incidence due to local embryological complexity and multifactorial etiology. The anomaly, with its variants, results from an inherent defect between the internal and external nasal buds, both from the frontal and upper maxillary bud. Labio-palatine clefts are characterized by a tissue deficiency as well as an abnormal disposition of the present tissues. It is believed that the labial clefts are consecutive to the lack of apoptosis of the ectoderm which envelops the internal maxillary and nasal buds, thus constituting a barrier to the fusion process of buds. Depending on the location and the extentension of the cleft, the labial cleft occurs, or the more frequent, the labial-alveolar cleft. The study group consisted of 22 patients with labio-palatine clefts, of which 16 boys (72.72%) and 6 girls (27.27%), who presented in the clinic for treatment. When the causative factor acts earlier, the clfet develops posteriorly, since mesodermization begins from the posterior to the anterior. The more disturbing factor acts, the greater the cleft. The increase in the incidence of labial-palatine cleft is believed to be mainly due to the increase in the number of women of older gestational age in women; women over 35 years of age have a double risk of having children with labio-palatine clefts, the risk being three times higher for mothers over the 39 years.

scholarly journals Identification and characterization of the 2D6 and Mr 23000 antigens on the plasma membrane of rat spermatozoa

1987 ◽  
Vol 241 (2) ◽  
pp. 353-360 ◽  
Author(s):  
R Jones ◽  
C R Brown
Keyword(s):  
Plasma Membrane ◽  
Antigenic Determinant ◽  
Egg Recognition ◽  
Western Blots ◽  
One Dimensional ◽  
Antigen Present ◽  
Membrane Bound ◽  
Species Specific ◽  
Identification And Characterization

Previous investigations [Jones, Brown, von Glos & Gaunt (1985) Exp. Cell Res. 156, 31-44] have demonstrated the appearance of a new antigenic determinant (recognized by monoclonal antibody 2D6) on the plasma membrane of rat spermatozoa during post-testicular maturation in the epididymis. Identification of the 2D6 antigen on Western blots from one-dimensional SDS/polyacrylamide gels revealed that it co-migrated with a membrane protein (designated Mr 23,000 antigen) present on testicular and immature germ cells, suggesting that one antigen might be a modified version of the other. In the present work, however, we demonstrate that, although they have similar Mr and are present in soluble and membrane-bound forms, the 2D6 and Mr 23,000 antigens are biochemically and immunologically distinct molecules. The properties of the antigens are described and compared. The Mr 23,000 antigen is present on both testicular and cauda epididymidal spermatozoa, has a pI of 6.1, contains no detectable carbohydrate, is not tissue-specific and is degraded by V8 protease. By contrast, the 2D6 antigen is glycosylated, has a broad pI from 4.5 to 6.1, is tissue- and species-specific and is resistant to digestion with V8 protease. Its role in sperm-egg recognition is discussed.

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