scholarly journals Alimentación del cacomixtle (Bassariscus astutus) en un ambiente urbano y uno agrícola en los valles centrales de Oaxaca

2019 ◽  
Vol 9 (1) ◽  
pp. 31
Author(s):  
Cesar Cisneros-Moreno ◽  
Matías Martínez-Coronel
Keyword(s):  
Natural Environment ◽  
Rural Population ◽  
Urban Population ◽  
Niche Overlap ◽  
Trophic Niche ◽  
Fecal Analysis ◽  
Fecal Pellets ◽  
Bird Eggs ◽  
Bassariscus Astutus ◽  
Two Populations

ResumenEn este estudio se determinó la dieta de una población urbana y una rural de Bassariscus astutus en los valles centrales de Oaxaca, con base en el examen de 139 excretas recolectadas durante el 2018. En él se identificaron 48 elementos, que representan ocho categorías alimentarias, de las cuales frutos y artrópodos conforman la dieta básica de la población urbana (58.18%) y rural (88.49%). Las aves fueron más consumidas en la población urbana (19.23%) que en la rural (5.31%). Asimismo, se encontró que la población urbana consumió dulces y chocolates (9.13%) y huevos de aves (1.92%), categorías que no estuvieron representadas en la población rural. Por su parte, los mamíferos, pastos y productos antropogénicos complementaron la dieta de ambas poblaciones. La amplitud del nicho trófico fue menor en la población urbana (Bs = 0.30) en comparación con la población rural (Bs = 0.35), así como las dietas resultaron ser significativamente diferente entre ambas poblaciones (X2 = 19.92, g.l. = 5, p = 0.001). La sobreposición del nicho trófico entre las dos poblaciones fue O = 0.72. Tanto en la población urbana como en la población rural se encontraron diferencias estacionales en la dieta, debido al consumo diferencial de algunas categorías alimentarias. Bassariscus astutus es un carnívoro oportunista y generalista que aprovecha otros recursos alimenticios diferentes a los de su medio natural, por lo que puede persistir en el ambiente  urbano.Palabras clave: análisis de excretas, Bassariscus astutus, carnívoros urbanos, dieta, oportunista, valles centrales de Oaxaca.AbstractWe present here an analysis of an urban and a rural population of the ring-tailed cat, Bassariscus astutus, from the Central Valleys of Oaxaca. From an analysis of 139 fecal pellets, 48 prey types, representing eight food categories, were identified. Fruits and arthropods part of the basic diet of the urban (58.18%) and rural (88.49%) ring-tailed cat populations. Birds were more consumed in the urban population (19.23%) than in the rural (5.13%) population. Likewise, the urban ring-tailed population consumed candies (9.13%) and bird eggs (1.92%); food categories not represented in the rural population. Mammals, grasses and other anthropogenic products complement the diet of both populations. The amplitude of the trophic niche was lower in the urban population (Bs = 0.30) compared to the rural population (Bs = 0.35). The differences in diet between both populations were significantly different (X2 = 19.92, g.l. = 5, p = 0.001), and the trophic niche overlap between the two populations was O = 0.72. In both populations there were differences in the diet between some seasons of the year, due to the differential consumption of some food categories. The ring-tailed cat is an opportunistic and generalist carnivore, that can take advantage of food resources different from those of its natural environment, by which it can persist in the urban environment.Key words: Bassariscus astutus, central valleys of Oaxaca, diet, fecal analysis, opportunism, urban carnivores.

Trophic Relationships and Foraging Strategies of some New World Tree Snakes (Leptophis, Oxybelis, Uromacer)

1982 ◽  
Vol 3 (1) ◽  
pp. 71-80 ◽  
Author(s):  
Robert W. Henderson
Keyword(s):  
New World ◽  
Niche Overlap ◽  
Foraging Strategy ◽  
Trophic Niche ◽  
Trophic Relationships ◽  
Foraging Strategies ◽  
Body Proportions ◽  
Species Pairs ◽  
Bird Eggs ◽  
Similar Body

AbstractTrophic relationships and foraging strategies are examined in two New World arboreal, diurnal, snake communities: Leptophis mexicanus, Oxybelis aeneus, and O.fulgidus from Mexico's Yucatán Peninsula, and Uromacer catesbyi and U. oxyrhynchus from Isla Saona, República Dominicana. Active foragers (L. mexicanus and U. catesbyi) have similar body proportions and feed primarily on diurnally quiescent prey (hylid frogs, bird eggs). Sit-and-wait strategists (O. aeneus, O.fulgidus and U. oxyrhynchus) have similar body proportions and feed on diurnally active prey (primarily lizards). Active foragers take prey that is, on the average, larger than the prey of sit-and-wait foragers, but presumably, active foragers expend more energy in locating prey. Trophic niche breadth is widest among the active foragers and narrowest for the slender vine snakes (O. aeneus and U. oxyrhynchus). Trophic niche overlap values are low for species pairs that occur sympatrically (or syntopically) with the exception of O. aeneus-O. fulgidus, but O. fufgidus preys on a wider variety of lizard taxa, preys on birds (which are absent from the diet of O. aeneus), and takes prey items that are significantly larger in size. It seems likely that, among arboreal colubrids, the sit-and-wait foraging strategy is derived from one of active foraging.

Dynamic monitoring of changes in medical and demographic indicators in the Republic of Sakha (Yakutia) from 1998 to 2018

2020 ◽  
pp. 33-36
Keyword(s):  
Mortality Rate ◽  
Population Growth ◽  
Russian Federation ◽  
Rural Population ◽  
Urban Population ◽  
Birth Rate ◽  
Dynamic Monitoring ◽  
Demographic Indicators ◽  
The Russian Federation ◽  
The Republic

We studied the medical and demographic indicators in the Republic of Sakha (Yakutia) for the last 20 years (1998–2018). A decrease in the population by 4,7 % (р<0,01) was revealed in the Russian Federation in the period 1998–2008, 3,4 % decrease, followed by its growth by 2,8 % (р<0,01); a decrease in the number of rural population in the republic and an increase in the urban population were observed. By the beginning of 2019, in comparison with the 2003 data, an increase in the population by 1.9% (р<0,01), a decrease in the number of able-bodied people in the Republic of Sakha (Yakutia) at the beginning of 2019, as compared to 1998, were revealed, by 8,2 %, in the Russian Federation – by 4,7 % (р<0,01). In the Republic of Sakha (Yakutia) the birth rate remains high, the mortality rate is relatively low, and the natural population growth is maintained.

scholarly journals The food web in a subterranean ecosystem is driven by intraguild predation

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Andrea Parimuchová ◽  
Lenka Petráková Dušátková ◽  
Ľubomír Kováč ◽  
Táňa Macháčková ◽  
Ondřej Slabý ◽  
...  
Keyword(s):  
Food Web ◽  
Trophic Interactions ◽  
Intraguild Predation ◽  
Linear Models ◽  
Niche Overlap ◽  
Trophic Niche ◽  
High Availability ◽  
Large Prey ◽  
Arthropod Predators ◽  
Body Sizes

AbstractTrophic interactions of cave arthropods have been understudied. We used molecular methods (NGS) to decipher the food web in the subterranean ecosystem of the Ardovská Cave (Western Carpathians, Slovakia). We collected five arthropod predators of the species Parasitus loricatus (gamasid mites), Eukoenenia spelaea (palpigrades), Quedius mesomelinus (beetles), and Porrhomma profundum and Centromerus cavernarum (both spiders) and prey belonging to several orders. Various arthropod orders were exploited as prey, and trophic interactions differed among the predators. Linear models were used to compare absolute and relative prey body sizes among the predators. Quedius exploited relatively small prey, while Eukoenenia and Parasitus fed on relatively large prey. Exploitation of eggs or cadavers is discussed. In contrast to previous studies, Eukoenenia was found to be carnivorous. A high proportion of intraguild predation was found in all predators. Intraspecific consumption (most likely cannibalism) was detected only in mites and beetles. Using Pianka’s index, the highest trophic niche overlaps were found between Porrhomma and Parasitus and between Centromerus and Eukoenenia, while the lowest niche overlap was found between Parasitus and Quedius. Contrary to what we expected, the high availability of Diptera and Isopoda as a potential prey in the studied system was not corroborated. Our work demonstrates that intraguild diet plays an important role in predators occupying subterranean ecosystems.

scholarly journals Effectiveness of Government Policies in Controlling COVID-19 in India

2020 ◽  
pp. 002073142098374
Author(s):  
Ashutosh Pandey ◽  
Nitin Kishore Saxena
Keyword(s):  
Population Density ◽  
Rural Areas ◽  
Rural Population ◽  
Urban Areas ◽  
Urban Population ◽  
Demographic Factors ◽  
Poverty Rate ◽  
Government Policies ◽  
Cumulative Number ◽  
Population Number

The purpose of this study is to find the demographic factors associated with the spread of COVID-19 and to suggest a measure for identifying the effectiveness of government policies in controlling COVID-19. The study hypothesizes that the cumulative number of confirmed COVID-19 patients depends on the urban population, rural population, number of persons older than 50, population density, and poverty rate. A log-linear model is used to test the stated hypothesis, with the cumulative number of confirmed COVID-19 patients up to period [Formula: see text] as a dependent variable and demographic factors as an independent variable. The policy effectiveness indicator is calculated by taking the difference of the COVID rank of the [Formula: see text]th state based on the predicted model and the actual COVID rank of the [Formula: see text]th state[Formula: see text]Our study finds that the urban population significantly impacts the spread of COVID-19. On the other hand, demographic factors such as rural population, density, and age structure do not impact the spread of COVID-19 significantly. Thus, people residing in urban areas face a significant threat of COVID-19 as compared to people in rural areas.

Trophic niche overlap between native freshwater mussels (Order: Unionida) and the invasive Corbicula fluminea

2021 ◽  
Author(s):  
Vanessa Modesto ◽  
Ester Dias ◽  
Martina Ilarri ◽  
Manuel Lopes‐Lima ◽  
Amílcar Teixeira ◽  
...  
Keyword(s):  
Freshwater Mussels ◽  
Corbicula Fluminea ◽  
Niche Overlap ◽  
Trophic Niche

MO759COMPERATIVE STUDY OF THE CARDIOVASCULAR SYSTEM IN PATIENTS WITH CKD ON HEMODIALYSIS IN URBAN AND RURAL POPULATIONS OF UZBEKISTAN

2021 ◽  
Vol 36 (Supplement_1) ◽  
Author(s):  
Olimkhon Sharapov ◽  
Botir Daminov
Keyword(s):  
Heart Failure ◽  
Rural Areas ◽  
Rural Population ◽  
Urban Population ◽  
Medical Center ◽  
Women Patients ◽  
Urban Group ◽  
Rural And Urban ◽  
Ckd Stage ◽  
Rural Group

Abstract Background and Aims According to recently published WHO data, kidney disease has been the 10th leading cause of death in the world over the past 20 years. The lethality of dialysis patients with cardiovascular pathology is 3 times higher than that of patients without CVD. This is especially pronounced in developing countries. Uzbekistan is a country with a population of 34 million and has an equal urban and rural population. In this regard, it is of interest to comparatively study the structure of CVD in patients with CKD stage 5D of the rural and urban population of Uzbekistan. Method We examined 165 (90 men and 75 women) patients with CKD stage 5 receiving dialysis in urban and rural areas of Uzbekistan. The patients were divided into 2 groups depending on their permanent place of residence and the medical center where they receive hemodialysis. 104 (51 men and 53 women) patients were included in the Urban group and 61 (39 men and 22 women) patients were included in the Rural group. The average age of the urban population was 49.7 ± 1.38 years, the rural population was 45.5 ± 1.83 years. All patients underwent programmed hemodialysis according to the standard scheme for 4 hours 3 times a day (12 hours/week). The average duration of hemodialysis in the Urban group was 37.0 ± 4.77 months (M ± m) and 16.6 ± 2.4 months in the Rural group. The main causes of CKD 5D in both groups were glomerulonephritis (Urban-36.5%, Rural-62%) and type 2 diabetes (Urban-31.7%, Rural-18%). Results CVD comorbidity occurred in 55,8% (n=92) of all 165 examined patients, of which 52 were men and 40 were women. The most common CVDs in all groups were hypertension (51%, n=84), coronary heart disease, presented as angina (28%, n=47), heart failure (14%, n=23) and various types of arrhythmias (5%, n=8). 77% (n=127) of patients had anemia due ESRD. In the group Urban(n=104), 62.5% (n=65) had CVD. The main CVD was Hypertension. It was found in 92% (n=60) of patients with CVD in this group. Less (65%, n=42) were patients with angina. Heart failure was detected in 31% (n=20) of patients. Arrhythmia was diagnosed in only 5% (n=5). A large number of combined CVD have been identified. 69% (n=45) of all patients with CVD had a combined CVDs in different combinations. The most common combination was hypertension + angina (n = 26). It accounted for almost 58% of all combined cases. Only 28% (n=17) of all cases with hypertension had "isolated" hypertension. The main combination with hypertension was hypertension + angina (43%, n=26), 11% (n=11) of patients had hypertension + angina + heart failure, a combination in the form of hypertension + angina + arrhythmia had 3% (n=3) patients. Relatively fewer (n = 27, 44%) CVD were found in the Rural group. The most frequent CVD was also a hypertension. Patients with hypertension made up 89% (n = 24) of all patients with CVD in this group. The second place is occupied by angina, it was found in 18.5% (n=5) cases among patients with CVD. Combined CVS pathologies were less common in the rural group. A total of 8 patients (29.6% of all CVD cases) had several CVDs. Conclusion Сardiovascular diseases in the urban population (62.5%) occur almost one and a half times more often than in the rural population (44%). Combined CVD pathology occupies a leading place in the structure of CVD in patients with CKD 5D, both urban and rural.

scholarly journals Ecology of colonizing populations of the figfly Zaprionus indianus (Diptera, Drosophilidae) in Porto Alegre, Southern Brazil

2005 ◽  
Vol 95 (3) ◽  
pp. 233-240 ◽  
Author(s):  
Norma Machado da Silva ◽  
Carina da Conceição Fantinel ◽  
Vera Lucia da Silva Valente ◽  
Vitor Hugo Valiati
Keyword(s):  
Niche Breadth ◽  
Niche Overlap ◽  
Trophic Niche ◽  
Survival Strategies ◽  
Porto Alegre ◽  
Zaprionus Indianus ◽  
Feeding Sites ◽  
Substrate Choice ◽  
Oviposition Substrate ◽  
Feeding Substrate

Ecological parameters such as trophic niche overlap and niche breadth were computed from the frequency of all drosophilid species collected in 2001 and 2002, in the urban area of Porto Alegre city, Brazil. Independently of place, drosophilids community composition and components breeding or feeding sites, the highest frequencies of Zaprionus indianus (Gupta, 1970) were obtained during seasons with higher average temperatures, especially during summer. From a total of the 19,146 individuals of Z. indianus sampled, 80% were found in this season. The data of trophic niche breadth suggest a higher opportunism of adult flies in feeding substrate use, but the females are still selective in oviposition substrate choice. For the values of niche overlap, only for some species, did we find any correlation between these and species richness and/or number of resources, and the most of the correlation values considering breeding and feeding sites were positive. The colonization of Z. indianus in Porto Alegre could be leading to adjustments in the survival strategies of the resident species, but it is possible that many species have conditions for coexisting with the invader.

scholarly journals Trophic ecology of sea urchins in coral-rocky reef systems, Ecuador

PeerJ ◽  
2016 ◽  
Vol 4 ◽  
pp. e1578 ◽  
Author(s):  
Nancy Cabanillas-Terán ◽  
Peggy Loor-Andrade ◽  
Ruber Rodríguez-Barreras ◽  
Jorge Cortés
Keyword(s):  
Stable Isotope ◽  
Trophic Ecology ◽  
Habitat Degradation ◽  
Sea Urchins ◽  
Relative Proportion ◽  
Isotope Analysis ◽  
Niche Overlap ◽  
Trophic Niche ◽  
Rocky Reef ◽  
Trophic Overlap

Sea urchins are important grazers and influence reef development in the Eastern Tropical Pacific (ETP).Diadema mexicanumandEucidaris thouarsiiare the most important sea urchins on the Ecuadorian coastal reefs. This study provided a trophic scenario for these two species of echinoids in the coral-rocky reef bottoms of the Ecuadorian coast, using stable isotopes. We evaluated the relative proportion of algal resources assimilated, and trophic niche of the two sea urchins in the most southern coral-rocky reefs of the ETP in two sites with different disturbance level. Bayesian models were used to estimate the contribution of algal sources, niche breadth, and trophic overlap between the two species. The sea urchins behaved as opportunistic feeders, although they showed differential resource assimilation.Eucidaris thouarsiiis the dominant species in disturbed environments; likewise, their niche amplitude was broader than that ofD. mexicanumwhen conditions were not optimal. However, there was no niche overlap between the species. The Stable Isotope Analysis in R (SIAR) indicated that both sea urchins shared limiting resources in the disturbed area, mainlyDictyotaspp. (contributions of up to 85% forD. mexicanumand up to 75% forE. thouarsii). The Stable Isotope Bayesian Ellipses in R (SIBER) analysis results indicated less interspecific competition in the undisturbed site. Our results suggested a trophic niche partitioning between sympatric sea urchin species in coastal areas of the ETP, but the limitation of resources could lead to trophic overlap and stronger habitat degradation.

scholarly journals Clinico-epidemiological profile of acute respiratory infections and malnutrition in urban and rural population of central India

2016 ◽  
Vol 4 (1) ◽  
pp. 159
Author(s):  
Pranav G. Jawade ◽  
Neelam D. Sukhsohale ◽  
Gayatri G. Jawade ◽  
Binish Z. A. Khan ◽  
Pratik K. Kakani ◽  
...  
Keyword(s):  
Rural Population ◽  
Urban Population ◽  
Respiratory Infections ◽  
Severe Acute Malnutrition ◽  
Pediatric Population ◽  
Central India ◽  
Developing Nations ◽  
Acute Malnutrition ◽  
Acute Respiratory Infections ◽  
Cross Sectional

Background: Acute respiratory infections (ARI) and Malnutrition in children have tremendous burden on the health care sector of developing nations including India. The intensity with which these conditions are holding grip in the community is indeed a matter of concern and hence developing nations should develop an insight to assess the severity of it has become a necessity.Methods: A hospital based cross sectional study was carried out in children aged 0-14 years. Children were clinically assessed and diagnosis was made as URTI or LRTI Also anthropometry was performed and accordingly children were divided into categories of no malnutrition (NM), severe acute malnutrition (SAM) and moderate acute malnutrition (MAM) in ‘under 5’ years age children according to WHO guidelines, whereas children aged ‘above 5’ years were categorized as per the IAP guidelines.Results: It was observed that most of the mothers of children were illiterate with inadequate or absent ventilation and use of biomass fuels (chulha) for cooking purpose in households of rural children. The proportion of malnutrition was found to be equal in Under 5 children. In ‘above 5 years’ age study subjects, 52.4% of urban study subjects were normal as compared to 16.7% of rural study subjects.Conclusions: Our study implies that ARI and Malnutrition definitely is more prevalent in the pediatric population. Prevalence of URTI was found to be on a higher side in the rural population and LRTI prevalence was found to be higher in the urban population. Similarly, the prevalence of malnutrition was almost similar in ‘Under 5’ aged children, whereas the prevalence of malnutrition in ‘Above 5’ aged children was higher in the rural population than urban population.

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