scholarly journals Structure of the ichthyofauna of adventitious streams in the South Pantanal

2018 ◽  
Vol 108 (0) ◽  
Author(s):  
Virginia S. Uieda ◽  
César Y. Fujihara
Keyword(s):  
Riparian Vegetation ◽  
New Record ◽  
Riparian Forest ◽  
Habitat Characteristics ◽  
Fish Diversity ◽  
The South ◽  
Wet Season ◽  
Paraguay River ◽  
The One ◽  
Large Predators

ABSTRACT: The ichthyofauna of the Taquari River, one of the main tributaries of the South Pantanal, has been studied since the 1970s; however, there is a gap on the studies about the ichthyofauna present on the small adventitious streams of this highly dendritic system. These streams are small tributaries that flow directly into large rivers (mainstem), at least three orders greater in magnitude. The aim of this study was to analyze the structure of the ichthyofauna of five adventitious streams of the Upper Taquari River, South Pantanal, evaluating its temporal variation (dry and wet season) and the relation to the habitat characteristics and the conservation of the streams. Thirty-seven species were collected, from which 14 are exclusive to the Paraguay River basin, one species [Apteronotus albifrons (Linnaeus, 1766)] could represent a new record for this basin, and six species need taxonomic confirmation. The analysis indicated only the existence of spatial variation in the ichthyofauna structure of the streams sampled, with the similarity patterns related to the distance between the streams and to their conditions of conservation. The stream with greater size and preserved riparian forest was the one with the highest values of fish diversity and evenness. On the other hand, the stream with the smallest percentage of riparian forest and highest proximity to urban area presented the lowest diversity. The small size of these adventitious systems should serve as protection against large predators, which have their access to those areas hampered by their own size. Otherwise, the mainstem may also act as source of dispersal of small-bodied schooling fishes to the adventitious streams, where the greater heterogeneity of habitats and the presence of riparian vegetation should offer shelter and food supply for small species.

Arthropod 'rain' into tropical streams: the importance of intact riparian forest and influences on fish diets

2008 ◽  
Vol 59 (8) ◽  
pp. 653 ◽  
Author(s):  
Eric K. W. Chan ◽  
Yixin Zhang ◽  
David Dudgeon
Keyword(s):  
Riparian Vegetation ◽  
Riparian Forest ◽  
Wet Season ◽  
Important Prey ◽  
Terrestrial Arthropods ◽  
Fish Diets ◽  
Terrestrial Insects ◽  
Forest Streams ◽  
The Tropics ◽  
Trophic Linkages

Terrestrial arthropods might represent an important energy source for stream predators, but these trophic linkages have seldom been studied in the tropics. Terrestrial arthropod inputs (essentially, arthropod ‘rain’) into four streams with different riparian vegetation (two draining shrublands and two draining forests) were measured over three consecutive seasons (dry, wet, dry) from 2005 to 2007 in monsoonal Hong Kong. Predatory minnows, Parazacco spilurus (Cyprinidae), were collected and their consumption of terrestrial arthropods was estimated. Inputs of arthropods were dominated by Diptera, Collembola, Formicidae and aerial Hymenoptera, accounting for ≥73% of the arthropod abundance. Seasonal variation was marked: numbers in the dry seasons were approximately half (47–57%) those in the wet season, and biomass fell to one-third (33–37%) of the wet-season value. Shrubland streams received 19–43% fewer individuals and 6–34% less biomass than shaded forest streams. An analysis of fish diets in three of the four streams showed that terrestrial insects and spiders were more important prey in the two forest streams, accounting for 35–43% of prey abundance (39–43% by volume) v. 28% (27%) in the shrubland stream. Because riparian vegetation is the source of terrestrial arthropod inputs to streams, degradation of streamside forests that reduce these inputs will have consequences for the diets of stream fishes.

scholarly journals Bells, bomas and beefsteak: complex patterns of human-predator conflict at the wildlife-agropastoral interface in Zimbabwe

PeerJ ◽  
2017 ◽  
Vol 5 ◽  
pp. e2898 ◽  
Author(s):  
Andrew J. Loveridge ◽  
Timothy Kuiper ◽  
Roger H. Parry ◽  
Lovemore Sibanda ◽  
Jane Hunt Hunt ◽  
...  
Keyword(s):  
Crocuta Crocuta ◽  
Foraging Success ◽  
Wet Season ◽  
Livestock Depredation ◽  
Domestic Species ◽  
Management Policies ◽  
Disproportionate Number ◽  
Study Sites ◽  
The One ◽  
Large Predators

Reports of livestock depredation by large predators were systematically collected at three study sites in northwestern Zimbabwe from 2008–2013. We recorded 1,527 incidents (2,039 animals killed and 306 injured). Lions (Panthera leo) and spotted hyaenas (Crocuta crocuta) were mostly responsible, and cattle and donkeys most frequently attacked. Patterns of predation were variable among study sites. Nevertheless, some overall patterns were apparent. Predators selected livestock close to the size of their preferred wild prey, suggesting behaviours evolved to optimise foraging success may determine the domestic species primarily preyed upon. Most attacks occurred when livestock were roaming outside and away from their ‘home’ protective enclosures at night. Hyaena attacks were largely nocturnal; lions and leopards (Panthera pardus) were more flexible, with attacks occurring by day and at night. Livestock fitted with bells suffered a disproportionate number of attacks; the sound of bells appears to have conditioned predators to associate the sound with foraging opportunities. Lion and hyaena attacks on cattle were more frequent in the wet season suggesting that seasonal herding practices may result in cattle vulnerability. Only a small proportion of conflict incidents were reported to wildlife management officials with a bias towards lion predation events, potentially prejudicing conflict management policies. Predation on domestic stock involves an intricate interplay between predator behaviour and ecology on the one hand and human behaviour and husbandry practices on the other. Our data suggest that improved livestock husbandry (supervision of grazing animals, protection at night in strong enclosures) would greatly reduce livestock depredation.

scholarly journals Small Patches of Riparian Woody Vegetation Enhance Biodiversity of Invertebrates

Water ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 3070
Author(s):  
Marie Anne Eurie Forio ◽  
Niels De Troyer ◽  
Koen Lock ◽  
Felix Witing ◽  
Lotte Baert ◽  
...  
Keyword(s):  
Riparian Vegetation ◽  
Human Impacts ◽  
Riparian Forest ◽  
Spatial Scales ◽  
Management Strategies ◽  
Habitat Characteristics ◽  
Carabid Beetles ◽  
Woody Vegetation ◽  
Riparian Management ◽  
Qualitative Index

Patches of riparian woody vegetation potentially help mitigate environmental impacts of agriculture and safeguard biodiversity. We investigated the effects of riparian forest on invertebrate diversity in coupled stream-riparian networks using a case study in the Zwalm river basin (Flanders, Belgium). Agriculture is one of the main pressures in the basin and riparian forest is limited to a number of isolated patches. Our 32 study sites comprised nine unshaded “unbuffered” sites which were paired with nine shaded “buffered” sites on the same stream reach, along with five ‘least-disturbed’ sites and nine downstream sites. We sampled water chemistry, habitat characteristics and stream and riparian invertebrates (carabid beetles and spiders) at each site. Three methods were used to quantify riparian attributes at different spatial scales: a visually-assessed qualitative index, quantitative estimates of habitat categories in six rectangular plots (10 × 5 m) and geographic information system (GIS)-derived land cover data. We investigated relationships between invertebrates and riparian attributes at different scales with linear regression and redundancy analyses. Spiders and carabids were most associated with local riparian attributes. In contrast, aquatic macroinvertebrates were strongly influenced by the extent of riparian vegetation in a riparian band upstream (100–300 m). These findings demonstrate the value of quantifying GIS-based metrics of riparian cover over larger spatial scales into assessments of the efficacy of riparian management as a complement to more detailed local scale riparian assessments in situ. Our findings highlight the value of even small patches of riparian vegetation in an otherwise extensively disturbed landscape in supporting biodiversity of both terrestrial and freshwater invertebrates and emphasize the need to consider multiple spatial scales in riparian management strategies which aim to mitigate human impacts on biodiversity in stream-riparian networks.

scholarly journals Cryptic species of the genus Pimelodella (Siluriformes: Heptapteridae) from the Miranda River, Paraguay River basin, Pantanal of Mato Grosso do Sul, Central Brazil

2013 ◽  
Vol 11 (1) ◽  
pp. 101-109 ◽  
Author(s):  
Lenice Souza-Shibatta ◽  
Larissa Forim Pezenti ◽  
Dhiego Gomes Ferreira ◽  
Fernanda Simões de Almeida ◽  
Silvia Helena Sofia ◽  
...  
Keyword(s):  
Cryptic Species ◽  
Fish Diversity ◽  
Morphometric Characters ◽  
Mato Grosso ◽  
Central Brazil ◽  
Paraguay River ◽  
State Present ◽  
Adipose Fin ◽  
The One ◽  
Mato Grosso Do Sul

Specimens of Pimelodellacaptured in the Miranda River, Pantanal of Mato Grosso do Sul State, present morphological features that could indicate at least four species. Therefore, karyotype analysis and molecular biology provided evidence that they were only two species, one showing 2n = 46, and the other, 2n = 52 chromosomes, with only 18% genetic similarity. The morphological analysis evidenced that the dorsal filament is a male characteristic and that the upper lobe of the caudal fin was variable and might or might not be elongated in both species. With respect to morphometric characters, the formation of two groups was evident, but with a small overlap of specimens between them. Among the species with filaments on the dorsal fin observed in the Pantanal, the one with the lesser length of adipose fin base is P. griffini, which corresponds to that with 2n = 46 chromosomes, whereas the species P. taenioptera has 2n = 52 chromosomes. Thus, the accurate detection of these cryptic taxonomic units was only possible with the use of various analysis techniques. Furthermore, it is worth noting that the identification of cryptic species is important for obtaining correct estimates of fish diversity in the Pantanal

The Fable of the Writer in Southern Fiction

Prospects ◽  
1982 ◽  
Vol 7 ◽  
pp. 249-266
Author(s):  
Lewis P. Simpson
Keyword(s):  
The Other ◽  
Deep South ◽  
The South ◽  
Southern Fiction ◽  
Yoknapatawpha County ◽  
The One

No scene in Faulkner is more compelling than the one that transpires on a “long still hot weary dead September afternoon” in Yoknapatawpha County, Mississippi, toward the end of the first decade of this century. Quentin Compson sits with Miss Rosa Coldfield in a “dim airless room” still called “the office because her father called it that,” and listens to Miss Rosa tell her version of the story of the “demon” Sutpen and his plantation, Sutpen's Hundred. As she talks “in that grim haggard amazed voice”—“vanishing into and then out of the long intervals like a stream, a trickle running from patch to patch of dried sand”—the 22-year-old Mississippi youth discovers he is hearing not Miss Rosa but the voices of “two separate Quentins.” One voice is that of the “Quentin preparing for Harvard in the South, the deep South dead since 1865 and peopled with garrulous baffled ghosts.” The other voice is that of the Quentin “who was still too young to deserve yet to be a ghost, but nevertheless having to be one for all that, since he was born and bred in the deep South the same as she [Miss Rosa] was.” The two Quentins talk “to one another in the long silence of notpeople, in notlanguage: It seems that this demon—his name was Sutpen—(Colonel Sutpen)—Colonel Sutpen. Who came out of nowhere and without warning upon the land with a band of strange niggers and built a plantation”.

The effects of US–China competing strategies in Asia-Pacific on India and Pakistan rivalry in the South Asian region

2021 ◽  
pp. 205789112110211
Author(s):  
Zafar Khan
Keyword(s):  
South Asian ◽  
Strategic Partnership ◽  
Grand Strategy ◽  
Asia Pacific ◽  
The South ◽  
Reduced Pressure ◽  
The Us ◽  
Belt And Road ◽  
Modernization Process ◽  
The One

This article primarily focuses on how the increasing US–China competing strategies in Asia-Pacific affect the policies of South Asian rivals India and Pakistan when, on the one hand, the US as part of its offshore balancing grand strategy has been increasing its strategic partnership with India through the transfer of emerging technologies in terms of military modernization process, and on the other hand, China and Pakistan have improved their geo-economic and geostrategic partnership as part of the Chinese grand strategy via the Belt and Road Initiative while enabling Pakistan to produce effective countermeasures against its potential adversary. The article presumes that, in doing so, such competing strategies frame a quadrangle setting comprising of US and India to deter and contain China on the one hand and China and Pakistan to produce countermeasures and try to create a balance to potentially prevent the risk of conflict in South Asia out of such competing strategies at the quadrangle order conceived here. However, in fact, neither the US nor rising China would desire such a possibility of conflict otherwise unintendedly occurring from the intense US–China competing strategies while affecting the policies of the South Asian rivals. The article concludes that the shaping of this quadrangle framework may bring both opportunities and challenges for the South Asian rivals. It also concludes that the more intense the competition between the US and China becomes, the more intense its implications could be on the South Asian rivals, while the reduced tension between China and the US, although unlikely, would have reduced pressure on India and Pakistan relations as well.

scholarly journals Determinants of bird assemblage composition in riparian vegetation on sugarcane farms in the Queensland Wet Tropics

2015 ◽  
Vol 21 (1) ◽  
pp. 60 ◽  
Author(s):  
Anita F. Keir ◽  
Richard G. Pearson ◽  
Robert A. Congdon
Keyword(s):  
Riparian Vegetation ◽  
Wildlife Conservation ◽  
Agricultural Landscape ◽  
Riparian Zone ◽  
Riparian Forest ◽  
Agricultural Landscapes ◽  
Generalist Species ◽  
Assemblage Composition ◽  
Bird Assemblages ◽  
Wet Tropics

Remnant habitat patches in agricultural landscapes can contribute substantially to wildlife conservation. Understanding the main habitat variables that influence wildlife is important if these remnants are to be appropriately managed. We investigated relationships between the bird assemblages and characteristics of remnant riparian forest at 27 sites among sugarcane fields in the Queensland Wet Tropics bioregion. Sites within the remnant riparian zone had distinctly different bird assemblages from those of the forest, but provided habitat for many forest and generalist species. Width of the riparian vegetation and distance from source forest were the most important factors in explaining the bird assemblages in these remnant ribbons of vegetation. Gradual changes in assemblage composition occurred with increasing distance from source forest, with species of rainforest and dense vegetation being replaced by species of more open habitats, although increasing distance was confounded by decreasing riparian width. Species richness increased with width of the riparian zone, with high richness at the wide sites due to a mixture of open-habitat species typical of narrower sites and rainforest species typical of sites within intact forest, as a result of the greater similarity in vegetation characteristics between wide sites and the forest proper. The results demonstrate the habitat value for birds of remnant riparian vegetation in an agricultural landscape, supporting edge and open vegetation species with even narrow widths, but requiring substantial width (>90 m) to support specialists of the closed forest, the dominant original vegetation of the area.

The Villa Item and a Bride's Ordeal

1929 ◽  
Vol 19 (1) ◽  
pp. 67-87 ◽  
Author(s):  
Jocelyn Toynbee
Keyword(s):  
The South ◽  
Important Paper ◽  
The North ◽  
Dwelling House ◽  
South Wall ◽  
The Subject ◽  
The One ◽  
The Individual ◽  
North Wall ◽  
The Right

The paintings in the triclinium of the Villa Item, a dwelling-house excavated in 1909 outside the Porta Ercolanese at Pompeii, have not only often been published and discussed by foreign scholars, but they have also formed the subject of an important paper in this Journal. The artistic qualities of the paintings have been ably set forth: it has been established beyond all doubt that the subject they depict is some form of Dionysiac initiation: and, of the detailed interpretations of the first seven of the individual scenes, those originally put forward by de Petra and accepted, modified or developed by Mrs. Tillyard appear, so far as they go, to be unquestionably on the right lines. A fresh study of the Villa Item frescoes would seem, however, to be justified by the fact that the majority of previous writers have confined their attention almost entirely to the first seven scenes—the three to the east of the entrance on the north wall (fig. 3), the three on the east wall and the one to the east of the window on the south wall, to which the last figure on the east wall, the winged figure with the whip, undoubtedly belongs.

scholarly journals An Empire of Memory: Overseas British War Cemeteries, 1917–1983

2018 ◽  
Vol 38 (2) ◽  
pp. 255-286
Author(s):  
Sam Edwards
Keyword(s):  
Twentieth Century ◽  
South Atlantic ◽  
British Government ◽  
The South ◽  
Informal Empire ◽  
The Moment ◽  
The One

This article examines how a post-1918 Edwardian commemorative aesthetic focused on the “English Garden” was deployed in the later twentieth century as a means to establish an “informal” Empire of memory. The result is an architectural irony and a landscape at odds with the moment that made it: the post-1945 cemeteries of the Imperial War Graves Commission (IWGC) expanded the now defunct Empire’s commemorative possessions just as the actual deeds to land were surrendered. The one exception to this story of contemporaneous political withdrawal and commemorative appropriation nonetheless proves the broader point. For after the bloody imperial war fought in the South Atlantic in 1982 the Commission, at the behest of the British government, built its first and last post-1945 overseas war cemetery. And just as had been the case sixty years earlier, the form and style of this cemetery ensured it became the last outpost of an Edwardian Empire of memory.

1. On Annelid Tracks in the Exploration of the Millstone Grits in the South-west of the County of Clare.

1857 ◽  
Vol 3 ◽  
pp. 294-295
Author(s):  
Robert Harkness
Keyword(s):  
The Other ◽  
Perfect State ◽  
The South ◽  
Great Abundance ◽  
South West ◽  
Soft State ◽  
The One ◽  
To Receive

The author remarks that the existence of Annelida during the Palæozoic formations is manifested in two conditions. In the one, we have the shelly envelope which invests the order Tubicola, in the form of Seapolites; and in the other, the tracks of the orders Abranchia and Dorsi-branchiata are found impressed on deposits which were, at one time, in a sufficiently soft state to receive the impressions of the wanderings of these animals.Among the strata which have hitherto afforded annelid tracks, those which, in the county of Clare, represent a portion of the equivalents of the Millstone Grit, contain such tracks, in their most perfect state of preservation in great abundance; and these strata also furnish evidence concerning the circumstances which prevailed during their deposition.

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