Growth Depression Research Articles

Detection and Identification of Avian Reovirus in Young Geese (Anser anser domestica) in Poland

Avian reovirus (ARV) is a cause of infections of broiler and turkey flocks, as well as waterfowl birds. This case report describes a reovirus detection in a fattening goose flock. GRV-infected geese suffer from severe arthritis, tenosynovitis, pericarditis, depressed growth, or runting-stunting syndrome (RSS), malabsorption syndrome, and respiratory and enteric diseases. GRV (goose reovirus) caused pathological lesions in various organs and joints, especially in the liver and spleen. GRV infection causes splenic necrosis, which induces immunosuppression, predisposing geese to infection with other pathogens, which could worsen the disease and lead to death. Our results showed that GRV was detected via RT-PCR and isolated in SPF (Specific Pathogen Free) embryos. This is the first report of the involvement of reovirus in arthritis, and the generalized infection of young geese in Poland, resulting in pathological changes in internal organs and sudden death. This study also provides new information about the GRV, a disease that is little known and underestimated.

A plastid nucleoside kinase is involved in inosine salvage and control of purine nucleotide biosynthesis.

In nucleotide metabolism, nucleoside kinases recycle nucleosides into nucleotides-a process called nucleoside salvage. Nucleoside kinases for adenosine, uridine, and cytidine have been characterized from many organisms, but kinases for inosine and guanosine salvage are not yet known in eukaryotes and only a few such enzymes have been described from bacteria. Here we identified Arabidopsis thaliana PLASTID NUCLEOSIDE KINASE 1 (PNK1), an enzyme highly conserved in plants and green algae belonging to the Phosphofructokinase B family. We demonstrate that PNK1 from A. thaliana is located in plastids and catalyzes the phosphorylation of inosine, 5-aminoimidazole-4-carboxamide-1-β-d-ribose (AICA ribonucleoside), and uridine but not guanosine in vitro, and is involved in inosine salvage in vivo. PNK1 mutation leads to increased flux into purine nucleotide catabolism and, especially in the context of defective uridine degradation, to over-accumulation of uridine and UTP as well as growth depression. The data suggest that PNK1 is involved in feedback regulation of purine nucleotide biosynthesis and possibly also pyrimidine nucleotide biosynthesis. We additionally report that cold stress leads to accumulation of purine nucleotides, probably by inducing nucleotide biosynthesis, but that this adjustment of nucleotide homeostasis to environmental conditions is not controlled by PNK1.

A quantitative method to determine the region not influenced by injected interstitial and surface effects during void swelling in ion-irradiated metals

We propose and demonstrate a microstructurally-based experimental method to quantitively determine the depth regions in self-ion-irradiated metals that are affected by the injected interstitial effect and various surface effects, focusing on the choice of safe analysis zones to minimize the impact of these phenomena. The goal is to define the depth ranges where extracted data can be confidently applied to ion-neutron correlations for reactor application. Since ion energies in the range of 1–5 MeV are most frequently employed by the radiation effects community, irradiations were conducted at four energies in this range, all proceeding at 475 °C. The experiment was conducted on relatively pure single crystal iron to focus only on physical phenomena, avoiding the influence of possibly confounding chemical or segregation processes. Care was also taken to minimize the influence of other physical factors such as crystalline orientation. It was shown that, at 475 °C, ion energies of ≤1 MeV were too shallow in penetration and did not yield a safe depth range, but irradiations at 2.5 MeV and above yielded useful safe zones with predicted swelling behavior becoming independent of ion energy. The surface-affected zone width was found to be roughly twice that of the void-denuded zone width and to be independent of accumulated displacement dose. The largest injected-interstitial effect arises from the injected interstitial depression of void nucleation and growth. The interstitial-affected region starts at about one half of the projected range and does not show any “spreading” of its influence in depth as the peak damage level increases from 50 to 100 dpa. This study provides some confidence that enhances the credibility of ion simulation when applied to prediction of void swelling in neutron environments.

Psychosocial predictors of fear of cancer recurrence in acohort of gynecologic cancer survivors.

To describe fear of cancer recurrence in a cohort of women with gynecologic cancers and to identify psychosocial predictors of elevated fear of recurrence. Survey data from an ongoing cohort study of gynecologic cancer survivors were used (n=154). Relationships between fear of cancer recurrence measured by the 6-item Cancer Worry Scale in the most recent survey and psychosocial factors (cancer-related distress, depression, anxiety, hopelessness, and posttraumatic growth) assessed 6-18months prior were examined using univariate and multivariate linear regression models, adjusting for age, cancer stage, cancer type, and time since diagnosis. Most participants were ≥60years old, diagnosed with early-stage cancer, and 2-5years post-diagnosis. The mean score on the Cancer Worry Scale was 10.31 (SD=3.01), and 46 individuals (30.0%) scored ≥12, indicating high fear of recurrence. In univariate analyses, greater distress (p=0.007), anxiety (p=0.006), hopelessness (p=0.007), and posttraumatic growth (p=0.0006) were significantly associated with higher scores on the Cancer Worry Scale. The associations of hopelessness and posttraumatic growth with higher Cancer Worry Scale scores remained significant after adjustment for covariates. Fear of recurrence is frequent among gynecologic cancer survivors. Women who reported more distress, hopelessness, anxiety and, surprisingly, more post-traumatic growth reported more fear. These results contribute to our understanding of which cancer survivors are most at risk of elevated fear of recurrence and highlight the importance of continued focus on psychosocial well-being among cancer survivors.

Tree-ring evidence of ecological stress memory.

Plants experiencing stress could develop the ability to reshape their response toward present stress based on past stress experience, called 'ecological stress memory' (ESM), which is important for plant acclimation to repeated stresses. Although ESM has been largely reported, it remains unclear whether ESM could improve tree resistance to recurrent stress in subsequent decades. Here, we explore it from a tree-ring network of 1491 trees from 50 long-living juniper forests on the Tibetan Plateau. Through comparing performances of tree radial growth in past sequential growth stresses, we found that trees could obtain ESM under antecedent stresses and elevate resistance to subsequent stress after several years or even decades. Such positive effects of ESM are associated with post-stress recovery. Trees with slow recovery trajectories after antecedent stress show significantly improved resistance to subsequent stress, while trees with extremely fast post-stress recovery showed decreased resistance to subsequent stress. These results imply that temporary depressive tree radial growth after antecedent stress might be a trigger of long storage of ESM. Incorporating positive effects of ESM and relationship between ESM activation and post-stress recovery into future Earth system models could advance our capacity to predict forest dynamics and forest ecosystem stabilization under future stress conditions.

Developmental Models of Depression, Externalizing Problems, and Self-regulatory Processes: Integrated Data Analysis Across Four Longitudinal Studies of Youth.

Integrative data analysis (IDA) was used to derive developmental models of depression, externalizing problems, and self-regulatory processes in three prevention trials of the Family Check-Up and one longitudinal, community-based study of girls over a 10-year span covering early to late adolescence (N = 4,773; 74.9% female, 41.7% white). We used moderated nonlinear factor analysis to create harmonized scores based on all available items for a given participant in the pooled dataset while accounting for potential differences in both the latent factor and the individual items as a function of observed covariates. We also conducted latent growth model analyses to examine developmental trajectories of risk. Results indicated a bidirectional relationship between depression and externalizing problems, with greater baseline externalizing problems and depression predicting growth in inhibitory control difficulties. Furthermore, initial level of inhibitory control difficulties was associated with growth in depression. We did not, however, find a relationship between early inhibitory control difficulties and growth in externalizing problems. This work illustrates the utility of IDA techniques to harmonize data across multiple studies to identify risk factors for the development of depression and externalizing problems that can be targeted by prevention efforts.

Pretreatment with probiotics Enterococcus faecium NCIMB 11181 attenuated Salmonella Typhimurium-induced gut injury through modulating intestinal microbiome and immune responses with barrier function in broiler chickens

BackgroundPreventing Salmonella infection and colonization in young birds is key to improving poultry gut health and reducing Salmonella contamination of poultry products and decreasing salmonellosis for human consumption (poultry meat and eggs). Probiotics can improve poultry health. The present study was conducted to investigate the impact of a probiotics, Enterococcus faecium NCIMB 11181 (E. faecium NCIMB 11181) on the intestinal mucosal immune responses, microbiome and barrier function in the presence or absence of Salmonella Typhimurium (S. Typhimurium, ST) infection.MethodsTwo hundred and forty 1-day-old Salmonella-free male broiler chickens (Arbor Acres AA+) were randomly allocated to four groups with 6 replicate cages of 10 birds each. The four experimental groups were follows: (1) negative control (NC), (2) S. Typhimurium, challenged positive control (PC), (3) the E. faecium NCIMB 11181-treated group (EF), (4) the E. faecium NCIMB 11181-treated and S. Typhimurium-challenged group (PEF).ResultsResults indicated that, although continuous feeding E. faecium NCIMB 11181 did not obviously alleviate growth depression caused by S. Typhimurium challenge (P > 0.05), E. faecium NCIMB 11181 addition significantly blocked Salmonella intestinal colonization and translocation (P < 0.05). Moreover, supplemental E. faecium NCIMB 11181 to the infected chickens remarkably attenuated gut morphological structure damage and intestinal cell apoptosis induced by S. Typhimurium infection, as evidenced by increasing gut villous height and reducing intestinal TUNEL-positive cell numbers (P < 0.05). Also, E. faecium NCIMB 11181 administration notably promoting the production of anti-Salmonella antibodies in intestinal mucosa and serum of the infected birds (P < 0.05). Additionally, 16S rRNA sequencing analysis revealed that E. faecium NCIMB 11181 supplementation ameliorated S. Typhimurium infection-induced gut microbial dysbiosis by enriching Lachnospiracease and Alistipes levels, and suppressing Barnesiella abundance. Predicted function analysis indicated that the functional genes of cecal microbiome involved in C5-branched dibasic acid metabolism; valine, leucine and isoleucine biosynthesis; glycerolipid metabolism and lysine biosynthesis were enriched in the infected chickens given E. faecium NCIMB 11181. While alanine, asparate and glutamate metabolism; MAPK signal pathway-yeast; ubiquine and other terpenoid-quinore biosynthesis, protein processing in endoplasmic reticulum; as well as glutathione metabolism were suppressed by E. faecium NCIMB 11181 addition.ConclusionCollectively, our data suggested that dietary E. faecium NCIBM 11181 supplementation could ameliorate S. Typhimurium infection-induced gut injury in broiler chickens. Our findings also suggest that E. faecium NCIMB 11181 may serve as an effective non-antibiotic feed additive for improving gut health and controlling Salmonella infection in broiler chickens.

A multidimensional approach to the resilience in older adults despite COVID-19

Researchers have mainly focused on aging risk factors and COVID-19 consequences. However, older adults have proved their ability to overcome adversities along their life. Resilience is a protective variable that dampens the impact of stress. Based on MacLeod’s et al. (2016) approach, we aimed to analyze the relationship between older adults’ resilience and COVID-19 related-stressors as well as their physical, mental, and social characteristics. Eight hundred eighty-nine people aged 60 and over participated in this study. Older participants, women, having better perceived health and not losing a loved one because of the virus were associated with more resilience. Moreover, higher levels of gratitude, personal growth, life purpose and lower levels of depression were associated with greater scores in resilience. This study offers a change of perspective in which aging is perceived from a positive viewpoint by focusing on easily accessible resources that may help older adults to cope with adverse situations.

Water-Dispersible Activatable Nanoprobe for Detecting Cadmium-Ion-Induced Oxidative Stress in Edible Crops via Near-Infrared Second-Window Fluorescence Imaging.

Edible crops are important in terms of food security and sustainable agriculture. Heavy-metal-ion contamination of water/soil has deleterious impacts on the growth of edible crops. Among the heavy metals, cadmium (Cd) is toxic to plants, people, and animals, as it is widely used in industry; it has become the most important metal ion in the soil/water pollution. Once the toxic Cd ion enters edible crops via the water/soil in which the crops grow, it will induce oxidative stress (overproduction of reactive oxygen species with H2O2 being the most abundant) in the crops, and strong oxidative stress leads to the crops' growth depression or inhibition. Hence, it is of great significance to accurately monitor the oxidative stress induced by Cd ions in edible crops, as the monitoring results could be employed for the early warning of Cd-ion pollution in water/soil. Herein, we design an activatable nanoprobe that can detect Cd-ion-induced oxidative stress in edible crops via near-infrared second-window (NIR-II) fluorescence imaging. The molecular probe IXD-B contains the diphenylamine-modified xanthene group acting as the electron-donating unit, bis(methylenemalononitrile)indan as the electron-accepting unit, and the methenephenylboronic acid group as the recognition moiety for H2O2 and the fluorescence quencher. The probe molecules being encapsulated by the amphiphilic DSPE-PEG2000 render the water-dispersible nanoprobe (IXD-B@DSPE-PEG2000). When the nanoprobe enters the edible crops, it can be activated by the overexpressed H2O2 therein and consequently emit strong NIR-II fluorescence signals for visualizing and tracking the oxidative stress in edible crops induced by Cd ions.

Global trends of research on depression in breast cancer: A bibliometric study based on VOSviewer

BackgroundDepression is common psychiatric morbidity in breast cancer survivors, seriously affecting patients’ quality of life and mental health. A growing body of research has investigated depression in breast cancer. However, no visual bibliometric analysis was conducted in this field. This study aimed to visualize the literature to identify hotspots and frontiers in research on breast cancer and depression.MethodsThe publications related to depression in breast cancer were retrieved in the Web of Science Core Collection between 1 January 2002 and 17 March 2022. VOSviewer was used to identify co-occurrences and collaborations among countries, institutions, and keywords. CiteSpace was used to detect keyword bursts.ResultsA total of 7,350 articles and reviews related to depression in breast cancer were identified. From 2002 to 2022, the United States and the People’s Republic of China were the most productive countries in this field. The University of California, Los Angeles, and the University of Toronto were the most productive institutions in this field. The Journal of Psycho-oncology, followed by Supportive Care in Cancer and the Journal of Clinical Oncology, had the most publications on depression in breast cancer. Of the top 10 journals, seven were from the United States, two were from England, and one was from Germany. Five research hotspots of depression in breast cancer were identified by co-word analysis. Research on post-traumatic growth, spiritual interventions, cognitive-behavioral therapy, physical activity, and symptom cluster management of depression in breast cancer was relatively mature in the core hotspots. Burst detection of keywords on depression in breast cancer showed the latest hotspots, such as mental health, cancer survivor mortality, and activity.ConclusionThe research on depression in breast cancer is growing. Attention should be paid to the latest hotspots, such as mental health, cancer survivor, mortality, exercise, and physical activity.

Compensatory growth and energy reserves changes in the Pacific white shrimp (Litopenaeus vannamei) reared in different temperatures and under feed restriction in biofloc technology system (BFT)

It was evaluated the occurrence of compensatory growth in the Litopenaeus vannamei reared in different temperatures and under feed restriction in Biofloc Technology System (BFT) and its effects in energy reserves and immune system. The experiment lasted 64 days and was divided in two phases: (1) Restriction and (2) Recovery. L. vannamei were stocked with 1.78 ± 0.38 g at a stocking density of 300 shrimps/m3. In the first phase (36 days), the experiment was performed using three temperatures and two feed regimes experimental design, totaling six treatments (in triplicate). Three temperatures were chosen: optimum (28 °C), intermediate (24 °C) and low (20 °C) and two feeding regimes were established for each temperature: the control that received 100% of the calculated feed rate and the feed restriction group, where the feed rate was 40% of the control. In phase 2 (28 days), all the experimental units were exposed to favorable conditions. Total protein, glycogen and triglycerides content were quantified in hepatopancreas and muscle and differential hemocyte count (DHC) was analyzed in hemolymph, in days 0, 36 and 64. At the end of the experiment, previously restricted shrimps held at 24 and 28 °C displayed complete body weight catch-up through compensatory growth following the restriction period with depressed growth. Shrimps maintained at 20 and 24 °C with no feed restriction did not reach 28 °C treatment body mass when favorable temperature (28 °C) was established. Protein levels in hepatopancreas and muscle were not affected in any treatment over the experiment and glycogen was used as a metabolic fuel in all restricted groups during phase 1, but fully recovered when total feed supply was offered in phase 2. Triglycerides were also used in restricted shrimps held at 24 and 28 °C in phase 1, and after the recovery period, only treatment previously maintained at 24 °C presented total recovery. DHC presented differences among treatments, but was maintained in the optimal range for healthy shrimps reared in BFT system over the experimental period. Also, survival was not affected by feed restriction or low and intermediary temperatures. Therefore, it is possible to submit L. vannamei to partial feed restriction with as a trigger for total compensatory growth, in order to improve feed efficiency and decrease feed supply. Also, in regions that low temperatures are a limiting to shrimp growing seasons, it is viable to explore partial compensatory growth to increase annual harvests.

Resilience as a protective factor in face of pain symptomatology, disability and psychological outcomes in adult chronic pain populations: a scoping review.

Patients suffering from chronic pain experience significant disability and disease burden. Resilience has been understood to be a protective factor in face of adversity, eventually contributing to positive outcomes. As such, the current review sought to summarize the existing literature focusing on the roles of resilience in relation to pain phenomenology, pain outcomes (including function and mental health), amongst relevant clinical correlates in a bid to promote holistic management of debilitating chronic pain conditions from a resilience-oriented psychotherapeutic approach as an adjunct to pharmacological treatment. A scoping review was conducted on empirical studies surrounding the theme of resilience in adult chronic pain populations published before 9th May 2021. The following main inclusion criteria was applied; (a)adults diagnosed with chronic pain disorders, (b)use ofquantifiable pain measures, (c)use of quantifiable resilience measures. A total of 32 studies were then selected for the review. First, higher levels of resilience were associated with a reduced likelihood of experiencing any chronic pain, fewer pain sites, better psychological response towards nociception and reduced need for analgesia. Second, higher levels of resilience correlated with better daily and physical function, quality of life, psychosocial functioning and lower likelihood of co-morbid mental health disorders. Third, resilience was an intermediary variable in the pathways from pain phenomenology leading to pain interference, depression and post-traumatic growth. The findings were contextualized using pain-disability and resilience frameworks (The Pain and Disability Drivers Model, O'Leary's Resilience models) with suggestions to enhance resilience and contextual factors in the holistic management of adult chronic pain conditions. Future research should examine the differences in resilience between pain types as well as evaluate the efficacy of streamlined resilience-oriented interventions.

Physical Body Deformity Effects on Differential Growth and Body Traits Development in Commercial Broilers

Physical deformities have been a recurrent challenge on broiler production in the tropics. The effect of physical body deformity (PBD) on differential growth of 550 commercial broiler chicks of Ross308 strain from day-old to 56 days were evaluated. Experimental design was completely randomized Design (CRD), while treatment groups were normal birds (NB), crooked neck (CN), twisted Leg (TL) and crooked neck+twisted leg (CN+TL). Data were collected on body weight (BWT, g), drumstick length (DST, cm), wing length (WGL, cm), shank+toe length (STL, cm) and leg length (LEL, cm); and were subjected to General Linear model (GLM), α=0.05, regression and Tukey’s Honestly Significant Difference (HSD) procedures of Statistical Analytical Systems software, SAS® v8 (2008). Physical body deformity depressed broiler growth and development significantly (P&lt;0.05) with small to large effects sizes (ds = -1.40 to 0.70). The differences in latent growth between deformity groups were significant (P&lt;0.05), of practical ( dS&gt;0.5) and large (f 2&gt;0.4) importance from age 35 to 56 days. The CN+TL broiler group was most significantly depressed by physical deformity with linear growth speed of 0.43, and quadratic late growth speed of -0.19. Most adverse impact of the deformity conditions on growth and body development spanned from 35 to 56 days, and could lead to rejection of live birds at maturity and low profitability of small flock enterprises in the tropics.&#x0D; Keywords: Commercial broilers, Physical abnormalities, Growth and development, Torticollis, Valgus-varus angulation

The impact of virtual learning on students’ educational behavior and pervasiveness of depression among university students due to the COVID-19 pandemic

BackgroundOne of the worst pandemics of recent memory, COVID-19, severely impacted the public. In particular, students were physically and mentally affected by the lockdown and the shift from physical person-to-person classrooms to virtual learning (online classes). This increased the prevalence of psychological stress, anxiety, and depression among university students. In this study, we investigated the depression levels in Saudi Arabian university students who were learning virtually because of the COVID-19 pandemic and examined its impact on their educational proficiency.MethodsThe study focused on two points: first, examining the depression levels among undergraduate students in Saudi Arabia, by adapting the Zung (Self-Rating Depression Scale) questionnaire. Second, whether there is an association between the levels of depression and various distress factors associated with virtual (online) learning resulting from the COVID-19 pandemic and its impact on students’ educational behaviors. The questionnaire was prepared using a monkey survey and shared online, via email, and on WhatsApp groups, with participants in two universities, a public and private university in the largest city of Saudi Arabia. A total of 157 complete responses were received. Data were analyzed using SPSS-24, the chi-square test, descriptive statistics, and multilinear regression.ResultsThe results indicated that three-fourths of the university students suffered from different depressive symptoms, half of which had moderate to extreme levels of depression. Our study confirmed that a boring virtual (online) learning method, stress, fear of examinations, and decreased productivity were significantly associated with increased depression. In addition, 75% and 79% of the students suffered from stress and fear of examinations, respectively. About half of the students were associated with increased depression. The outcome also indicated that female students experienced extreme depression, stress, and fear of examinations more than males.ConclusionThese findings can inform government agencies and representatives of the importance of making swift, effective decisions to address students’ depression levels. It is essential to provide training for students to change their educational experience mindset, which might help decrease "depression and stress-related growth." There is also a need to search for a better virtual teaching delivery method to lessen students' stress and fear of examinations.

Bioactivities evaluation of an endophytic bacterial strain Bacillus velezensis JRX-YG39 inhabiting wild grape

BackgroundBotrytis cinerea can cause serious disease on lots of plant hosts during growth and postharvest storage. Biocontrol is known to be eco-friendly methods to control pathogens. Plant endophytic bacteria are generally considered as beneficial organisms, since they can promote plant growth and enhance plant immune system. Thus, screening biological control agents is very important for sustainable plant protection.ResultsFifty-six endophytic bacteria were obtained from wild grape. Sixteen isolates and their extracts exhibited significant antifungal activity against B. cinerea. Particularly, strain JRX-YG39 with the strongest inhibition ability had a broad-spectrum antifungal activity. Combining 16S rDNA analysis and the phylogenetic results based on gyrA and gyrB genes, JRX-YG39 was assigned as Bacillus velezensis. JRX-YG39 could produce bioactive VOCs and obviously depressed mycelia growth of B. cinerea. It was confirmed that VOCs released by JRX-YG39 could significantly promote growth and induce defense of Arabidopsis thaliana. Thirty-one bioactive secondary metabolites were further identified from JRX-YG39 culture by gas chromatography–mass spectrometry analysis. Dibutyl phthalate, a potential antifungal substance, was the major compound accounting for 78.65%.ConclusionsB. velezensis JRX-YG39 has wide broad-spectrum antagonistic activity and significant plant promotion activity. Hence, B. velezensis JRX-YG39 will provide a valuable constituent of modern agricultural practice as biofertilizers and biocontrol agents.

Low water pH depressed growth and early development of giant freshwater prawn Macrobrachium rosenbergii larvae

Macrobrachium rosenbergii is one of the shellfish species with high aquaculture value due to its increasing market demand. However, the comparatively low production volume compared to demand coupled with the rapid decline of the natural environment, consequently, drives the potential depletion of the wild population. The decrease in water pH related to anthropogenic pollution is one of the most critical factors affecting the early life performances of M. rosenbergii. Therefore, this study was designed to examine the effect of low water pH on feeding, growth and development of M. rosenbergii early life stages. Experimental water pH was set as neutral (7.7 ± 0.4); mild-acidic (6.4 ± 0.5) and acidic (5.4 ± 0.2) with triplication at a stocking density of 2 larvae/L for 30 days. As expected, M. rosenbergii larvae were highly sensitive to acidic pH with no larvae survived beyond 48 h of exposure. Feeding, survival and growth of larvae were adversely affected by mild-acidic pH exposure as compared to neutral pH. Larvae exposed to mild-acidic water pH experienced a prolonged larval period and only metamorphosed to the post-larval stage at day-30. Whilst under neutral water pH, larval that metamorphosed to post-larval was first observed on day-23. The negative impact of decreased pH, even in mild-acidic pH exposure, on the feeding, survival, growth and development of M. rosenbergii larvae highlights the urgency of periodic pH monitoring during M. rosenbergii larviculture.

Nutritional Evaluation of Animal By-Products Meal as Partial Substitute for Fishmeal in the Diet of African Catfish, Clarias gariepinus (Burchell, 1822)

The effects of substituting fishmeal with Animal By-products Meal (ABM) in six experimental diets for African catfish fingerlings, Clarias gariepinus (mean weight=2.05g±0.11) with 0%, 20%, 40%, 60%, 80% and 100% substitution were investigated for 70 days. In general, the best growth and feeding performance were obtained with a control diet (D1) based on fishmeal as the sole protein, but he result was not statistically different (P&gt;0.05) from those obtained with 20%, 40%, and 60% ABM inclusion. A significant (P&lt;0.05) growth depression was observed with diet treatments containing 80%, and 100% ABM inclusion. Whole body percentages of moisture, lipid, ash, and NFE were not significantly affected by the dietary treatments. Crude protein contents however, were highest for fish fed higher levels of dietary protein. The result of this study suggest that 60% ABM/40% fishmeal can be incorporated in the diet of African catfish without adversely affecting growth or any other aspect of performance, and as well as, improving the economics of feeding in comparison with fishmeal

Species- and Age-Specific Growth Reactions to Extreme Droughts of the Keystone Tree Species across Forest-Steppe and Sub-Taiga Habitats of South Siberia

Over the coming decades, climate change can decrease forest productivity and stability in many semiarid regions. Tree-ring width (TRW) analysis allows estimation of tree sensitivity to droughts, including resistance (Rt) and resilience (Rc) indexes. It helps to find adaptive potential of individual trees and forest populations. On a forest stand scale, it is affected by habitat conditions and species’ ecophysiological characteristics, and on individual scale by tree genotype, age, and size. This study investigated TRW response to droughts in forest-steppe and sub-taiga of southern Siberia for keystone species Scots pine (Pinus sylvestris L.), Siberian larch (Larix sibirica Ledeb.), and silver birch (Betula pendula Roth.). Chronologies reacted positively to the Standardized Precipitation-Evapotranspiration Index (SPEI) of the previous July–September and current April–July. Depressed tree growth across region and droughts lasting over both intra-seasonal intervals were registered in 1965, 1974, and 1999. TRW-based Rt and Rc for these droughts did not reveal age- or size-related patterns. Higher growth stability indexes were observed for birch in sub-taiga and for conifers in forest-steppe. Larch at all sites had disadvantage against pine for 1965 and 1999 droughts aggravated by pest outbreaks, but adapted better to drought in 1974. Site aridity affected both tree growth stability and intensity of climatic response.

Anxiety and Depression from Childhood to Young Adulthood: Trajectories and Risk Factors.

This study aimed to (1) evaluate how population levels of anxiety and depression grow and correlate from middle childhood through early adulthood, and (2) determine whether sex, family socioeconomic status, parental education, academic achievement, learning disabilities, or externalizing symptoms predict anxiety and/or depression levels and growth trajectory. We used two longitudinal samples (N = 445, 448) of Portuguese children. Mean depression levels increased from mid-childhood through adolescence before stabilizing in early adulthood and were most strongly predicted by academic achievement and learning disabilities. Mean anxiety levels increased until adolescence before decreasing across early adulthood and were most strongly predicted by academic achievement, learning disabilities, and externalizing symptoms. Quadratic models of growth fit best for both depression and anxiety, and depression and anxiety growth trajectories were strongly correlated. Though anxiety and depression trajectories differ in pattern and predictors, the two are highly interrelated and pathways to comorbid anxiety and depression should be characterized.

Slower growth of farmed eels stocked into rivers with higher wild eel density.

Farmed anguillid eels are frequently stocked into natural fresh waters to enhance eel resources, but little is known about what happens to these eels or their interactions with wild eels after stocking. A recent study observed a depressed survival and growth rate of farmed Japanese eels when they were reared with wild eels, which indicated that wild eels might interfere with the survival and growth of farmed-and-stocked eels through intraspecific competition. To contribute to improving eel stocking efficiency, the growth of farmed-and-stocked Japanese eels was compared among four rivers with different wild eel densities using mark-and-recapture studies. Based on the 2-year recapture survey after stocking, it was found that the density of the farmed-and-stocked eels was not significantly different among rivers. The daily growth rates of farmed-and-stocked eels in the rivers with lower wild eel density were significantly higher than those of the eels stocked into the rivers with higher wild eel density. The farmed-and-stocked eels moved significantly greater distances downstream than wild eels that showed sedentary behaviour. This and previous studies indicate that significant questions remain about the effectiveness of stocking farmed eels into water bodies where naturally recruited wild eels are present.