Reproductive potential and production role of artificial reefs - Southeastern Brazil

2021 ◽  
pp. 107710
Author(s):  
Igor David da Costa ◽  
Jorge Luís da Silva Santos ◽  
Leonardo Lopes Costa ◽  
Juliano Silva Lima ◽  
Ilana Rosental Zalmon
Keyword(s):  
Reproductive Potential ◽  
Artificial Reefs ◽  
Southeastern Brazil

The Role of Artificial Reefs in Fisheries Management in Turkey

2011 ◽  
pp. 155-166
Author(s):  
Altan Lök ◽  
F Düzbastılar ◽  
Benal Gül ◽  
Aytaç Özgül ◽  
Ali Ula_
Keyword(s):  
Fisheries Management ◽  
Artificial Reefs

scholarly journals FORMATION OF OIL CONTENT IN OIL RADISH SEEDS DEPENDING ON APPLIED MICROELEMENTS

2020 ◽  
pp. 74-84
Author(s):  
Yaroslav Tsytsiura ◽  
Yurii Kovalchuk
Keyword(s):  
Trace Elements ◽  
Oil Content ◽  
Seed Quality ◽  
Reproductive Potential ◽  
Technical Direction ◽  
Oilseed Radish ◽  
The Family ◽  
Research Period

In the article the results of studying of features of role of trace elements in the formation of the quality indicators of seeds of oilseed radish in two varieties are reflected. Systematized the views of various researchers on the processes of formation of oil content in cruciferous crops in general and radish oilseed in particular, given the current strategy of fertilizer oilseed crops of the family Cruciferae. Studied feature of the stages of the implementation and effectiveness of mono-component micronutrients in the form of easily soluble and readily available substances. The studied set of microelements included the recommended list of physiologically important components of modern microfertilizer formats and their chemical composition in order to optimally analyze the effectiveness of application for their single application in two key phases of oilseed radish – the phenological phase of stalking and the phenological phase of flowering. The use of each of micronutrients was effective and substantial compared to the oil content of seeds of both cultivars of oilseed radish given the level of oil content in seeds in control variant. The magnitude of the variation in the oil index was estimated taking into account the differences in the nature of the hydrothermal regimes of the research period. This allowed to determine the degree of genotypic nature of the formation of the oil content of seeds in oilseed radish and the possibility and effectiveness of selection of appropriate genotypes with the prospect of obtaining oil in the technical direction of use. Also assessed the role of individual micronutrients in the magnitude of the volatility of oil content in seeds of oilseed radish. Determined that the increase of oil content in seeds of oilseed radish the addition of various trace elements in the range of 0.3-1.4% from the close dynamic the resulting effective action on the formation of this indicator in the form of Co>Zn>Cu>B>Mn>Mo. It is proved that the efficacy of these minerals increases with introducing them into the flowering stage, which is a critical period regarding the implementation of the reproductive potential of the plants of oilseed radish and the formation of appropriate indicators of the quality of its seeds. The recommendations for further research in the field of optimization of fertilizer radish seeds and micronutrients were formulated. Key words: oilseed radish, fertilizer, microelements, seed quality, oil content, variety.

Early-Stage Cervical Cancer

2021 ◽  
pp. 139-157
Author(s):  
Maria Luisa Fais ◽  
Giorgio Candotti ◽  
Giulia Carboni ◽  
Speranza Luisa Anedda ◽  
Valerio Mais ◽  
...  
Keyword(s):  
Cervical Cancer ◽  
Early Stage ◽  
Reproductive Potential ◽  
Conservative Surgery ◽  
High Resource ◽  
Incidence And Mortality ◽  
Fertility Sparing ◽  
Early Stage Cervical Cancer ◽  
Lymph Node Assessment

Recent advances in screening and early diagnosis have decreased cervical cancer incidence and mortality rate in high-resource settings. The postponement of childbearing and the young age of women at diagnosis produced new challenges in the management of this disease. In recent years, attention has been directed to assessing more conservative procedures that can reduce treatment-related morbidity, without compromising oncologic safety and reproductive potential. Fertility sparing surgery (FSS) procedures, including cervical conization, simple or radical trachelectomy with pelvic nodes dissection or sentinel lymph node assessment, and neoadjuvant chemotherapy followed by conization, have shown encouraging results. In this chapter, the authors discuss the role of conservative surgery in the management of early-stage cervical cancer focusing on obstetrical and oncological outcomes.

scholarly journals Kin-Mediated Male Choice and Alternative Reproductive Tactics in Spider Mites

Biology ◽  
2020 ◽  
Vol 9 (11) ◽  
pp. 360
Author(s):  
Peter Schausberger ◽  
Yukie Sato
Keyword(s):  
Random Mating ◽  
Reproductive Potential ◽  
Spider Mites ◽  
Alternative Reproductive Tactics ◽  
Male Choice ◽  
Reproductive Tactics ◽  
Kin Competition ◽  
Context Specific ◽  
Two Populations

Optimal outbreeding and kin selection theories state that the degree of kinship is a fundamental determinant in any mating system. However, the role of kinship in male choice and alternative reproductive tactics (ARTs) is poorly known. We assessed the influence of kinship on male choice and expression of ARTs in two populations of two-spotted spider mites Tetranychus urticae. Male spider mites guard premature females, which is an indicator of mate choice, and may conditionally adopt fighting or sneaking tactics to secure access to females. Males competing with kin or non-kin were offered one kin or non-kin female (experiment 1) and single males were presented a choice of kin and non-kin females (experiment 2). Under kin competition, males of both populations were more prone to guard non-kin than kin females at a 3:1 fighter:sneaker ratio. Under non-kin competition, all males were fighters. Under no-choice, males used novelty as indicator of genetic dissimilarity, serving as absolute decision rule for outbreeding. Under choice, comparative evaluation allowed males to preferentially guard females with higher reproductive potential. Overall, our study suggests that male spider mites can assess kinship of rivals and prospective mates. Kin discrimination allows adaptive, context-specific non-random mating preference and adjustment of ARTs.

scholarly journals Gut bacterial diversity and physiological traits of Anastrepha fraterculus Brazilian-1 morphotype males are affected by antibiotic treatment

2019 ◽  
Vol 19 (S1) ◽  
Author(s):  
María Laura Juárez ◽  
Lida Elena Pimper ◽  
Guillermo Enrique Bachmann ◽  
Claudia Alejandra Conte ◽  
María Josefina Ruiz ◽  
...  
Keyword(s):  
Nutritional Status ◽  
Reproductive Potential ◽  
Deep Understanding ◽  
Fruit Fly ◽  
Positive Contribution ◽  
Bacterial Symbionts ◽  
Physiological Mechanisms ◽  
Anastrepha Fraterculus ◽  
Symbiotic Organisms

Abstract Background The interaction between gut bacterial symbionts and Tephritidae became the focus of several studies that showed that bacteria contributed to the nutritional status and the reproductive potential of its fruit fly hosts. Anastrepha fraterculus is an economically important fruit pest in South America. This pest is currently controlled by insecticides, which prompt the development of environmentally friendly methods such as the sterile insect technique (SIT). For SIT to be effective, a deep understanding of the biology and sexual behavior of the target species is needed. Although many studies have contributed in this direction, little is known about the composition and role of A. fraterculus symbiotic bacteria. In this study we tested the hypothesis that gut bacteria contribute to nutritional status and reproductive success of A. fraterculus males. Results AB affected the bacterial community of the digestive tract of A. fraterculus, in particular bacteria belonging to the Enterobacteriaceae family, which was the dominant bacterial group in the control flies (i.e., non-treated with AB). AB negatively affected parameters directly related to the mating success of laboratory males and their nutritional status. AB also affected males’ survival under starvation conditions. The effect of AB on the behaviour and nutritional status of the males depended on two additional factors: the origin of the males and the presence of a proteinaceous source in the diet. Conclusions Our results suggest that A. fraterculus males gut contain symbiotic organisms that are able to exert a positive contribution on A. fraterculus males’ fitness, although the physiological mechanisms still need further studies.

scholarly journals Reproductive Potential of Yeast Cells Depends on Overall Action of Interconnected Changes in Central Carbon Metabolism, Cellular Biosynthetic Capacity, and Proteostasis

2020 ◽  
Vol 21 (19) ◽  
pp. 7313
Author(s):  
Roman Maslanka ◽  
Renata Zadrag-Tecza
Keyword(s):  
Calorie Restriction ◽  
Carbon Metabolism ◽  
Metabolic Flux ◽  
Reproductive Potential ◽  
Central Carbon Metabolism ◽  
Yeast Cells ◽  
Reproductive Capacity ◽  
Hexokinase 2 ◽  
Central Carbon

Carbon metabolism is a crucial aspect of cell life. Glucose, as the primary source of energy and carbon skeleton, determines the type of cell metabolism and biosynthetic capabilities, which, through the regulation of cell size, may affect the reproductive capacity of the yeast cell. Calorie restriction is considered as the most effective way to improve cellular physiological capacity, and its molecular mechanisms are complex and include several nutrient signaling pathways. It is widely assumed that the metabolic shift from fermentation to respiration is treated as a substantial driving force for the mechanism of calorie restriction and its influence on reproductive capabilities of cells. In this paper, we propose another approach to this issue based on analysis the connection between energy-producing and biomass formation pathways which are closed in the metabolic triangle, i.e., the respiration-glycolysis-pentose phosphate pathway. The analyses were based on the use of cells lacking hexokinase 2 (∆hxk2) and conditions of different glucose concentration corresponding to the calorie restriction and the calorie excess. Hexokinase 2 is the key enzyme involved in central carbon metabolism and is also treated as a calorie restriction mimetic. The experimental model used allows us to explain both the role of increased respiration as an effect of calorie restriction but also other aspects of carbon metabolism and the related metabolic flux in regulation of reproductive potential of the cells. The obtained results reveal that increased respiration is not a prerequisite for reproductive potential extension but rather an accompanying effect of the positive role of calorie restriction. More important seems to be the changes connected with fluxes in central carbon metabolic pathways resulting in low biosynthetic capabilities and improved proteostasis.

Interspecific Competition and Population Control in Freshwater Fish

1956 ◽  
Vol 13 (3) ◽  
pp. 327-342 ◽  
Author(s):  
P. A. Larkin
Keyword(s):  
Interspecific Competition ◽  
Freshwater Fish ◽  
Quantitative Data ◽  
Population Control ◽  
Feeding Habits ◽  
Reproductive Potential ◽  
Habitat Type ◽  
Fish Populations ◽  
Population Interaction

Interspecific competition is defined as the demand of more than one organism for the same resource of the environment in excess of immediate supply. When two species are "competing for a niche" the term competition has been used to include phenomena such as predation of the two species on each other, competition to avoid a parasite, etc. Making this distinction in natural situations is unrealistic. In the limited sense in which interspecific competition is defined above, it is a discrete phenomenon, which with other phenomena such as predation, can be measured as a factor involved in interaction between species.Freshwater environments offer comparatively few opportunities for specialization in fishes. In consequence many species have a relatively wide tolerance of habitat type, a flexibility of feeding habits and in general share many resources of their environment with several other species of fish. Cannibalism and mutual predation are common complications of competitive relationships between species. The organization of freshwater fish communities is thus characterized by breadth at each level of the food chain rather than by a height of a pyramid of numbers. Flexible growth rate and high reproductive potential permit fish populations to tide over unfavorable periods of competition. In these circumstances it is difficult to separate the role of interspecific competition from other phenomena as a factor of population control. As a subordinate factor, predisposing fish to loss from other causes, interspecific competition may act to influence population levels. There is need for quantitative data and mathematical models for study of the types of population interaction typical in freshwater fish associations.

scholarly journals Vascular epiphytes on Pseudobombax (Malvaceae) in rocky outcrops (inselbergs) in Brazilian Atlantic Rainforest: basis for conservation of a threatened ecosystem

Rodriguésia ◽  
2016 ◽  
Vol 67 (3) ◽  
pp. 583-601 ◽  
Author(s):  
Dayvid Rodrigues Couto ◽  
Henrique Machado Dias ◽  
Mirian Cristina Alvarez Pereira ◽  
Cláudio Nicoletti de Fraga ◽  
José Eduardo Macedo Pezzopane
Keyword(s):  
Southeastern Brazil ◽  
Southern Brazil ◽  
Floristic Similarity ◽  
Espírito Santo ◽  
Vascular Epiphytes ◽  
Different Types ◽  
Rocky Outcrops ◽  
Espirito Santo ◽  
Brazilian Atlantic Rainforest

Abstract This study evaluated the richness of vascular epiphytes on Pseudobombax sp. nov. in three inselbergs in the Atlantic Forest Domain in state of Espírito Santo and evaluated the floristic similarity between the areas. We sampled 111 phorophytes in three regions in the southern of Espírito Santo state and identified 151 species, 77 genera and 21 families of vascular epiphytes, of which the families Orchidaceae and Bromeliaceae showed the highest richness. Non-parametric estimators (Chao 2, Jackknife 1) indicate that 90 and 95% of species richness of epiphytes was recorded. The most diversified ecological category was the characteristic holoepiphytes. The ratio of the number of epiphytes and number of phorophytes sampled in a montane inselberg, in this study, was greater than the richness of vascular epiphytes found in the rocky outcrops of quartzite, and, in general, different types of Atlantic Domain forests, but smaller in richness for some Dense Ombrophilous Forests of southern Brazil. The three inselberg areas had distinct floras. The high richness, the endemism found, and the number of endangered species of epiphytes demonstrate the important role of Pseudobombax sp. nov., because of its architecture and size, in the maintenance of biodiversity on the inselbergs in southeastern Brazil.

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