scholarly journals Diet and ecomorphological relationships of four cichlid species from the Cuiabá River basin

2016 ◽  
Vol 14 (3) ◽  
Author(s):  
Gisele C. Novakowski ◽  
Fernanda A. S. Cassemiro ◽  
Norma S. Hahn
Keyword(s):  
River Basin ◽  
Gill Rakers ◽  
Cichlid Species ◽  
The Third ◽  
Food Size ◽  
Generalist Diet ◽  
Species Grouping

ABSTRACT Relationship between diet and morphology of cichlid were analyzed considering that the trophic apparatus determines differential food use among species. Cichlasoma dimerus and Satanoperca pappaterra showed a generalist diet, while Chaetobranchopsis australis and Crenicichla vittata consumed zooplankton and fish, respectively. Significant correlation between morphology and diet was not found, but C. australis differed from the others species in the upper mouth and longer gill rakers. The morphology data and food size segregated the cichlids into three groups. The first was comprised by C. australis, which has many and longer gill rakers and a more protractile mouth, the second by C. vittata, which have a larger and more-protruded mouth and the third by S. pappaterra and C. dimerus, with a smaller and lower mouth. The latter two groups have more widely spaced gill rakers and consumed larger food. Overall, our results showed different patterns of species grouping when considering morphological or diet data. However, to C. australis the gill rakers determine both the type and size of food.

scholarly journals Reptilia, Testudines, Kinosternidae, Kinosternon scorpioides scorpioides (Linnaeus, 1766): distribution extension

Check List ◽  
2010 ◽  
Vol 6 (2) ◽  
pp. 314
Author(s):  
Henrique Caldeira Costa ◽  
Flavio De Barros Molina ◽  
Vinícius De Avelar São-Pedro ◽  
Renato Neves Feio
Keyword(s):  
River Basin ◽  
First Record ◽  
The State ◽  
South American ◽  
Mato Grosso ◽  
The Third

Kinosternon scorpioides scorpioides is the only subspecies of K. scorpioides with a South American distribution. We report the third known register of this taxon for the state of Mato Grosso, Brazil, representing the first record from the Aripuanã River basin. This point is at 390 km and 910 km western from the two previously known records of this species in Mato Grosso, reinforcing the importance of inventories of K. s. scorpioides.

Découverte, dans le sud-ouest du Québec, d'une population de cisco de lac, Coregonus artedii, frayant au printemps

1983 ◽  
Vol 61 (10) ◽  
pp. 2365-2368 ◽  
Author(s):  
Richard Pariseau ◽  
Pierre Dumont ◽  
Jean-Guy Migneault
Keyword(s):  
North America ◽  
River Basin ◽  
Gill Rakers ◽  
Ottawa River ◽  
Growing Period ◽  
Catching Up ◽  
Coregonus Artedii

We report the discovery of a spring spawning population of cisco, Coregonus artedii, a first in North America, at lac des Ecorces in southwestern Quebec (Ottawa River basin). Two longer specimens with a higher number of gill rakers were also taken. These were probably autumn spawners. The 1st year's growth of the spring spawning ciscoes is very limited owing to their comparatively short growing period, but some catching up is done afterwards.

scholarly journals Distributed modeling of soil erosion and sediment transport

2018 ◽  
Vol 34 (2) ◽  
pp. 763
Author(s):  
V. HRISSANTHOU ◽  
A. PSILOVIKOS
Keyword(s):  
Sediment Transport ◽  
River Basin ◽  
Sediment Yield ◽  
Surface Erosion ◽  
Rainfall Runoff ◽  
Distributed Modeling ◽  
The Third ◽  
Nestos River ◽  
Under Construction ◽  
The Individual

A mathematical model is used for the estimation of the annual sediment yield resulting from rainfall and runoff at the outlet of Nestos River basin (Toxotes, Thrace, Greece), where the ecologically interesting Nestos delta exists. The model is applied to that part of Nestos River basin (838 km2) which lies downstream of three dams. Two dams (Thissavros and Platanovryssi) have been already constructed, while the third one (Temenos) is under construction. The model consists of three sub-models: a rainfall-runoff sub-model, a surface erosion sub-model and a sediment transport sub-model for streams. This model is also capable of computing the annual erosion amount and sediment yield in the individual sub-basins

scholarly journals ETHNO-TERRITORIAL GROUPS OF UDMURTS: STATUS OF SOURCES, PROBLEMS AND RESULTS

2019 ◽  
Vol 13 (3) ◽  
pp. 503-519
Author(s):  
Nadezhda Ivanovna Shutova
Keyword(s):  
Internal Structure ◽  
River Basin ◽  
Structural Elements ◽  
Archaeological Data ◽  
The Third ◽  
The Common ◽  
Main Factors ◽  
The Right ◽  
Burial Grounds ◽  
Joining Process

The paper's theme is the internal structure of the Udmurt ethnos of the 19 - early 20 centuries. An overview of the main territorial and local divisions of the Udmurts was made according to the following indicators (criteria): the language, the location of the late Udmurt burial grounds of the 16 - first half of the 19 centuries, the costume complexes, the settling (inhabiting) zones of the main clan groups. The modern ethnological definitions such as ethnographic, ethnic, territorial and local groups used to denote structural elements of ethnos are given in the paper. To reveal the theme the author analyses three main directions. The first is the beliefs and rites of the Udmurts living in the 19 and early 20 centuries, the second is the problem of territories' colonization and the process of the ethnographic groups' formation, and the third is the main factors that influenced the Udmurts' formation. Within the first direction the all-Udmurt religious traits as well as the most important peculiarities of the beliefs and cult practices both of the Northern and Southern Udmurt groups are traced according to the folklore and ethnographic materials. Within the second direction the basic aspects of the colonization of four territorial groups' regions such as the Middle Vyatka River territories, the Cheptsa River basin, the southern part of modern Udmurtia, and the area between the right bank of the Lower Vyatka River and the Lower Kama River are explored according to the medieval archaeological data. The overall characteristics of the archaeological places and the results of their study, as well as the process of the population's formation at the above mentioned four regions are defined at the same time. Some poorly studied aspects of the problem under consideration are indicated. Within the third direction the four main factors for the joining process of the Udmurt ethnos formation are indicated. Among them are the common Perm base of all ethno-territorial Udmurt groups, then the long development including such sociocultural association as the Volga-Kama region, and also the consolidating functions of large district and territorial shrines, as well as the influence of the Bulgarian and Russian cultures

Structural analysis of river basins of the Upper Angara region

2017 ◽  
Vol 929 (11) ◽  
pp. 50-59
Author(s):  
M.Y. Opekunova ◽  
A.V. Bardash ◽  
S.A. Tukhta
Keyword(s):  
Structural Analysis ◽  
River Basin ◽  
River Basins ◽  
Karst Region ◽  
Third Order ◽  
The Third ◽  
Methodical Approach ◽  
Structural Indices

Oyek-river basin (right tributary of the Kuda-river) was used as a model site for revealing the features of the structure of river basins in the low-water karst region. Using the methodical approach of the Horton analysis, which was improved by Yu. G. Simonov, the main structural indices of the basin - bifurcation indices, lengths, areas, slopes, geomorphological work for sub-basins of the third order were determined. An analysis of the distribution of indices showed the greatest spread of the western part of the basin in the upper links of the erosion network. It is determined that the third-order sub-basins located in the western part within the Irkutsk-Cheremkhovskaya plain have the greatest homogeneity of structural indices, and the sub-basins of the Kudinskaya depression have the greatest diversity in the distribution of structural indices. An analysis of the distribution of the indicators of geomorphological work showed that significant work on the transfer of matter is performed by tributaries of the first orders of the western part of the basin, and maximum inflows are carried out in tributaries in the basins with the largest areas.

scholarly journals THE EFECTS OF SETTLEMENT ON THE PREVALENCE OF AscarisINFECTION IN TWO AMERINDIAN POPULATIONS OF THE BRAZILIAN AMAZON

1993 ◽  
Vol 23 (1) ◽  
pp. 25-35 ◽  
Author(s):  
Janet M. CHERNELA ◽  
Vernon E. THATCHER
Keyword(s):  
River Basin ◽  
Ascaris Lumbricoides ◽  
Environmental Contamination ◽  
Close Contact ◽  
Intestinal Parasites ◽  
Nematode Species ◽  
Brazilian Amazon ◽  
Necator Americanus ◽  
Fishing Villages ◽  
The Third

Studies were made of the intestinal parasites of Amerindian populations of the Uaupes River basin of Brazil. Three groups were sampled: 1) Tukano fisher-agriculturalists who live in permanent riverine villages; 2) Maku hunter-horticulturalists who live in close contact with the Tukano fishing villages; and 3) Maku who inhabit the forest interior and have little contact with permanent settlements. Fecal samples were collected from 498 individuals of which 220 were from the first group, 135 from de second and 143 from the third. The samples were analyzed by means of microflotation and centrifugal sedimentation. A total of 18 protozoan and helminth species were recorded based on the presence of cysts or eggs. These included five nematode species that could not be identified. The three common pathogenic nematodes were found to be prevalent: the hookworm, Necator americanus(96%); the whipworm, Trichuris trichiura(77%) and the large roundworm, Ascaris lumbricoides(75%). The prevalence of Ascarisamong the villages was found to vary from 56 to 100%. Individuals living in, or associated with, permanent settlements had higher prevalence and intensity rates than those living in the nomadic hunter-gatherer way. This is shown to be directly related to fecal contamination of the environment in and around permanent settlements. The prevalence of Ascarisin a population can be used as an indicator of such environmental contamination.

scholarly journals Optimasi Pengelolaan Waduk Pondok Ngawi Jawa Timur

2019 ◽  
Vol 4 (2) ◽  
Author(s):  
Hendro Susilo
Keyword(s):  
Water Supply ◽  
River Basin ◽  
Rice Plant ◽  
Initial Period ◽  
Growing Season ◽  
Net Benefit ◽  
Irrigated Rice ◽  
The Third ◽  
Reservoir Volume ◽  
Planting Season

Pondok Reservoir is one of the smaller reservoirs built in Bengawan Solo River Basin, located in Kali Dero, Gandong Village, Bringin District, Ngawi District, with a puddle of 3.6 km2 and 32.9 km2 of drainage area. The total reservoir volume is 25,233 MCM and the effective dams volume is 22,333 MCM. The reservoirs are used to irrigate 3.596 Ha of irrigated rice fields which are distributed through four weirs, namely Dero weir, Sambiroto dam, Plesungan dam, and Padas dam. The results showed that selected crops were rice and maize, while to obtain maximum annual agricultural benefit benefit can be done with the initial period of planting for the first planting season is the third week of November, which has annual net benefit value of agriculture of Rp. 10,797,000,000. Through continuous water supply, the optimal planting area for each planting season is the first planting season in the third week of November with rice plant of 2877 ha and 719 ha of maize; the second growing season in the third week of March with rice plants 1216 ha and 1216 ha of maize; third planting season in the third week of July with 402 ha of corn. Percentage of planted area from available land per planting season is: first planting season is 100%, second planting season is 67,63% and planting season is 11,18%, so planting intensity is 178,8%.

scholarly journals Sensitivity and uncertainty analysis of the Variable Infiltration Capacity model in the upstream of Heihe River basin

2015 ◽  
Vol 368 ◽  
pp. 312-316
Author(s):  
R. He ◽  
B. Pang
Keyword(s):  
River Basin ◽  
Soil Layer ◽  
Heihe River Basin ◽  
Heihe River ◽  
Model Parameters ◽  
Variable Infiltration Capacity ◽  
Infiltration Capacity ◽  
The Third ◽  
Variable Infiltration Capacity Model ◽  
Capacity Model

Abstract. The increasing water problems and eco-environmental issues of Heihe River basin have attracted widespread attention. In this research, the VIC (Variable Infiltration Capacity) model was selected to simulate the water cycle of the upstream in Heihe River basin. The GLUE (Generalized Likelihood Uncertainty Estimation) method was used to study the sensitivity of the model parameters and the uncertainty of model outputs. The results showed that the Nash-Sutcliffe efficient coefficient was 0.62 in the calibration period and 0.64 in the validation period. Of the seven elected parameters, Dm (maximum baseflow that can occur from the third soil layer), Ws (fraction of the maximum soil moisture of the third soil layer where non-linear baseflow occurs), and d1 (soil depth of the first soil layer), were very sensitive, especially d1. Observed discharges were almost in the range of the 95% predicted confidence range.

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