scholarly journals Birds and birding 2013-2020 at Macaneta, Southern Mozambique

2021 ◽  
Vol 1 (1) ◽  
pp. 1-30
Author(s):  
Gary Allport
Keyword(s):  
River Estuary ◽  
Coastal Dunes ◽  
Local Economy ◽  
Phalacrocorax Carbo ◽  
Wet Grasslands ◽  
Chlidonias Hybrida ◽  
Few Data ◽  
Annotated Checklist ◽  
Near Threatened ◽  
Area Of Study

The Macaneta area lies in the Incomati River estuary in northern Maputo Bay, Maputo Province, southern Mozambique. The 56 km2 area of study was selected based on access from tracks and follows no formal boundaries. The site comprises a 10 km stretch of ocean beach, coastal dunes with patchy thicket forest, and low lying wet grasslands inland to the Incomati River. The wetlands have complex hydrology offering diverse salinity and temporal conditions. The peninsula of Praia de Macaneta is also included in the study site but with few data. Improved access to the site in Oct 2016 enabled over 200 field ornithological visits Oct 2016-Oct 2020 and the sightings are analysed and reported herein. A total of 295 species was recorded including eight Globally Threatened birds (three Endangered, five Near-threatened) and Internationally Important numbers of White-breasted Cormorant Phalacrocorax carbo and Whiskered Terns Chlidonias hybrida were found. Three new birds for Mozambique were discovered; Sharp-tailed Sandpiper Calidris acuminata (first for Africa), White-rumped Sandpiper C. fuscicollis and Pearl-breasted Swallow Hirundo dimidiate. An annotated checklist of selected species is presented. The Sharp-tailed Sandpiper in particular drew much birder interest with 254 international visitor days over the 12 weeks of its first visit Feb-Apr 2018, contributing over US$12,000 into the local economy. The bird returned for two further seasons but it was not possible to gather further data.

scholarly journals Seasonal effects of wastewater to the water quality of the Caeté river estuary, Brazilian Amazon

2010 ◽  
Vol 82 (2) ◽  
pp. 467-478 ◽  
Author(s):  
Luci C.C. Pereira ◽  
Marcela C. Monteiro ◽  
Danielly O. Guimarães ◽  
Jislene B. Matos ◽  
Rauquírio M. da Costa
Keyword(s):  
Water Quality ◽  
River Estuary ◽  
Field Measurements ◽  
Local Environment ◽  
Local Economy ◽  
Seasonal Effects ◽  
Economic Activities ◽  
Dry Period ◽  
Biological Resources

Bragança's socioeconomic situation is highly dependent on estuarine and marine biological resources that are influenced by tidal cycles and climatology. Field measurements (hydrological, hydrodynamic and microbiological variables) were taken in the most urbanized zone from Caeté estuary to characterise the quality of the local environment. During the dry period, the estuary was more eutrophic and presented the highest temperature (30.5 °C in Oct./06), salinity (17 psu in Feb./07), pH (8.24 in Feb./07) and fecal coliform (> 1000 MPN/100 ml in Dec./06 and Feb./07) values. The phytoplankton Cyclotella meneghiniana, Coscinodiscus centralis and other r-strategist species were observed. The lack of basic hydric canalization was responsible for the local contamination, especially during the dry period when more concentrated wastewater from the city was emitted into the estuary, showing the human influence on the reduction of local estuarine water quality. In Bragança, the fishery is considered one of the main economic activities so, this contamination is worrisome because a large part of the local economy depends on biological resources and, thus, the contamination could negatively affect the environmental health of this Amazon ecosystem.

scholarly journals Annotated Checklist of the Marine and Coastal Birds of Lebanon

2020 ◽  
Vol 21 (1) ◽  
pp. 37-53
Author(s):  
Ghassan Ramadan-Jaradi ◽  
Keyword(s):  
Winter Season ◽  
Grey Heron ◽  
The Past ◽  
Yelkouan Shearwater ◽  
Coastal Birds ◽  
Leach’S Storm Petrel ◽  
Puffinus Yelkouan ◽  
Annotated Checklist ◽  
Little Egret ◽  
Near Threatened

The study of marine and coastal birds in the Lebanon recorded 75speciesalong the shore line of Lebanon and for a distance of 7 kms offshore.Of those species,35 are seabirdspecies, 38 marine or seawater/freshwater coastal birds, and 2waterbird specieswintering on the archipelagoes of Mina/Tripoli in North Lebanon (Grey Heron and Little Egret)with apparently much affinity to seawater in the winter season. This study highlighted 3 globally threatened species (Leach’s Storm Petrel Hydrobates leucorhoa [Vulnerable], Mediterranean Yelkouan Shearwater Puffinus yelkouan [Vulnerable], and Dalmatian Pelican Pelecanus crispus [Vulnerable]), underlined7 globally Near Threatened avian species, pointed out to 3 species that may be submitted for reconsideration bythe “Lebanon Bird Record Committee” (LBRC) at LCNRS;and updated the data of 9species of high significance from the past studies, of which, 2 species are upgraded from vagrants to winter visitors/passage migrants, one to passage migrant and one to wintervisitor..Regarding the final phenological statusesof species, one is resident breeding, one is summer breeding, 3 are formerly bred, one extirpated (extinct) from Lebanon 31are passage migrant/winter visitors, 25passage migrantsonly, 2winter visitors and 14vagrant species.

scholarly journals Sacramento Pikeminnow Migration Record

2020 ◽  
Vol 11 (2) ◽  
pp. 588-592
Author(s):  
Dennis A. Valentine ◽  
Matthew J. Young ◽  
Frederick Feyrer
Keyword(s):  
River Estuary ◽  
Northern California ◽  
Migratory Species ◽  
Body Of Knowledge ◽  
History Of ◽  
Ptychocheilus Grandis ◽  
Sacramento Pikeminnow ◽  
Few Data ◽  
Travel Distances ◽  
Passive Integrated Transponder Tags

Abstract Sacramento Pikeminnow Ptychocheilus grandis is a potamodromous species endemic to mid- and low-elevation streams and rivers of Central and Northern California. Adults are known to undertake substantial migrations, typically associated with spawning, though few data exist on the extent of these migrations. Six Sacramento Pikeminnow implanted with passive integrated transponder tags in the Sacramento–San Joaquin Delta were detected in Cottonwood and Mill creeks, tributaries to the Sacramento River in Northern California, between April 2018 and late February 2020. Total travel distances ranged from 354 to 432 km, the maximum of which exceeds the previously known record by at least 30 km. These observations add to a limited body of knowledge regarding the natural history of Sacramento Pikeminnow and highlight the importance of the river–estuary continuum as essential for this migratory species.

scholarly journals Silene thymifolia Sibth. et Sm. (Caryophyllaceae) – A vulnerable species in Romania: Anatomical aspects of vegetative organs

2021 ◽  
Vol 13 (1) ◽  
pp. 10875
Author(s):  
Loreley D. JIANU ◽  
Rodica BERCU ◽  
Dan R. POPOVICIU
Keyword(s):  
Cross Section ◽  
Secondary Xylem ◽  
Coastal Dunes ◽  
Vascular Bundles ◽  
Vulnerable Species ◽  
Spongy Tissue ◽  
Specific Staining ◽  
Vegetative Organs ◽  
Glandular Hairs ◽  
Near Threatened

Silene thymifolia (Caryophyllaceae) is considered a rare, near-threatened species in Romania, growing only on Black Sea coastal dunes.  Anatomical aspects of the root, stem and leaf of this species are presented in this study. Root, stem and leaves were analysed by brightfield microscopy, with specific staining. The root in cross section exhibited a secondary structure, generated by the activity of phellogen, and vascular cambium, with thick cork, continuous secondary xylem rings. no pith rays, but with cortical air lacunes. The stem had a primary structure with a number of collateral vascular bundles arranged on a single circle, with thick cortical schlerenchymal layers and oxalate crystals in pith cells. The epidermis showed stomata and glandular hairs. The leaf was amphystomatic leaf, with a heterogeneous mesophyll (equifacial type) and embedded vascular bundles, with a rounded mid rib surrounded by a parenchyma sheath. The spongy tissue has some large intercellular air spaces with druses. The mechanical tissue is well developed in the root and stem and poorly developed, represented by few collenchyma elements in the mesophyll, being represented by a continuous schlerenchyma fibers band present in root and stem and collenchyma in the leaf. The secretory histological elements were represented by epidermal glandular hairs and oxaliferous cells (druses) present in stem and leaf.

Forecasting the Local Economy, Using Time-Series and Shift—Share Techniques

1989 ◽  
Vol 21 (6) ◽  
pp. 753-770 ◽  
Author(s):  
J A Kurre ◽  
B R Weller
Keyword(s):  
Time Series ◽  
Time Series Analysis ◽  
Empirical Test ◽  
Local Economy ◽  
Metropolitan Region ◽  
Series Analysis ◽  
Data Points ◽  
Few Data ◽  
Regional Forecasts ◽  
Typical Method

Although shift – share is an inexpensive and easy means of making regional forecasts, its accuracy depends on the method used in forecasting the competitive component of the region. As theory is unclear as to the sign, let alone the magnitude, of the competitive component of the next period, it would be appropriate to use time-series techniques to forecast it. Unfortunately the typical method of application of shift–share results in too few data points for the application of time-series analysis. In this paper an alternative method of calculating the competitive component that resolves that problem is presented. In an empirical test of the technique, time-series methods are used to forecast the competitive series for a metropolitan region. The results are found to compare favorably with the forecasts of other techniques.

Distribution and abundance of grebes, pelicans, darters, cormorants, rails and terns in the Alligator Rivers Region, Northern Territory

1993 ◽  
Vol 20 (2) ◽  
pp. 203 ◽  
Author(s):  
SR Morton ◽  
KG Brennan ◽  
MD Armstrong
Keyword(s):  
Northern Territory ◽  
Dry Season ◽  
Correction Factors ◽  
Phalacrocorax Carbo ◽  
Wet Season ◽  
Aerial Surveys ◽  
Fulica Atra ◽  
Chlidonias Hybrida ◽  
Great Cormorants ◽  
Porphyrio Porphyrio

Aerial surveys between 1981 and 1984 were used to identify monthly trends in the abundance of Australian pelicans (Pelecanus conspicillatus), darters (Anhinga melanogaster), little pied cormorants (Phalacrocorax melanoleucos), and whiskered terns (Chlidonias hybrida) on five floodplains of the Alligator Rivers region, 250 km east of Darwin in the monsoonal Northern Territory. Ground surveys were conducted during the same period on one of the floodplains, the Magela plain. The aerial surveys indicated that the Magela floodplain was inhabited by few of these birds during the wet season (November-March), but that numbers then increased substantially in the dry season. The Nourlangie floodplain showed similar patterns, but the numbers of birds tended to be lower. Birds were generally uncommon on the shallower East Alligator and Cooper floodplains. Ground surveys suggested that the birds sought out the persistent swamps that characterise the Magela floodplain in the dry season. Ground surveys also indicated that aerial surveys underestimated densities; on the basis of correction factors calculated from ground surveys, peak numbers on the five floodplains were roughly estimated to be about 2000 darters, 9000 little pied cormorants, 55 000 Australian pelicans and 50 000 whiskered terns. Little black cormorants (Phalacrocorax sulcirostrus) were sometimes abundant, but their sporadic occurrence prevented analysis of seasonal trends. Australasian grebes (Tachybaptus novaehollandiae), great cormorants (Phalacrocorax carbo), pied cormorants (Phalacrocorax varius), buff-banded rails (Rallus philippensis), Baillon's crakes (Porzana pusilla), white-browed crakes (Poliolimnas cinereus), purple swamphens (Porphyrio porphyrio), Eurasian coots (Fulica atra), silver gulls (Larus novaehollandiae), white-winged terns (Chlidonias leucoptera), gull-billed terns (Gelochelidon nilotica) and Caspian terns (Hydroprogne caspia) were recorded in low numbers. The Alligator Rivers region acted as an important dry season refuge because of the unusually persistent fresh waters of the Magela and Nourlangie floodplains and some of the backswamps of the South Alligator, such as Boggy Plain.

An annotated checklist of crickets, grasshoppers and their allies (Orthoptera) in Slovakia

Zootaxa ◽  
2020 ◽  
Vol 4869 (2) ◽  
pp. 207-241
Author(s):  
ANTON KRIŠTÍN ◽  
BENJAMÍN JARČUŠKA ◽  
PETER KAŇUCH
Keyword(s):  
Iucn Red List ◽  
Museum Collections ◽  
Northern Limit ◽  
Species Lists ◽  
Biogeographical Region ◽  
Critical Revision ◽  
Data Deficient ◽  
Iucn Red List Criteria ◽  
Annotated Checklist ◽  
Near Threatened

The first annotated checklist of ensiferan and caeliferan Orthoptera of Slovakia is presented. Altogether, we found 129 species (59 Ensifera, 70 Caelifera) in the fauna of Slovakia, based on a critical revision of museum collections, all records published since 1826 and our own unpublished data from mapping in 1994–2019 (~2000 sites located in 97.5% of the mapping grid cells). Forty-four species reach the limit of their distributional range within the country, and 31 have their northern limit there. Four species are endemic to Slovakia. In total, 11 species were erroneously reported from the country and are not included in this checklist. The relatively rich species spectrum reflects the diversity of habitats in an area of about 50 thousand km2 and elevations from 94 to 2,655 masl. We found 30 species exclusive for the Pannonian and 18 for the Alpine biogeographical region in the study area. We emphasize changes compared to previous species lists published in 1977 and 1999, when nine species were first recorded after 1999, and eight other species have been missing for more than 50 years. Distributional patterns, accompanied by site maps, are commented for 42 species. Taxonomic, nomenclatural and zoogeographical problems are discussed for a further 23 species. Based on the actual IUCN Red List criteria, we assessed all 129 species. The species were red-listed as follows: regional extinct (Celes variabilis), critically endangered (Isophya beybienkoi, I. costata, Poecilimon fussii, Pachytrachis gracilis, Saga pedo, Paracaloptenus caloptenoides, Acrotylus insubricus, Stenobothrus fischeri), endangered (Poecilimon intermedius, Gampsocleis glabra, Pholidoptera frivaldszkyi, Myrmeleotettix antennatus), vulnerable (nine species), near threatened (18) and data deficient (12). A brief account of the Orthoptera research history in Slovakia is outlined.  

scholarly journals The birds (Aves) of Oromia, Ethiopia – an annotated checklist

2017 ◽  
Author(s):  
Kai Gedeon ◽  
Chemere Zewedie ◽  
Till Töpfer
Keyword(s):  
Bird Species ◽  
Breeding Birds ◽  
Bird Conservation ◽  
Horn Of Africa ◽  
Regional State ◽  
International Regulations ◽  
Annotated Checklist ◽  
Very High ◽  
High Diversity ◽  
Near Threatened

Oromia is the largest National Regional State of Ethiopia. Here we present the first comprehensive checklist of its birds. A total of 804 bird species has been recorded, 601 of them confirmed (443) or assumed (158) to be breeding birds. At least 561 are all-year residents (and 31 more potentially so), at least 73 are Afrotropical migrants and visitors (and 44 more potentially so), and 184 are Palaearctic migrants and visitors (and eight more potentially so). Three species are endemic to Oromia, 18 to Ethiopia and 43 to the Horn of Africa. 170 Oromia bird species are biome restricted: 57 to the Afrotropical Highlands biome, 95 to the Somali-Masai biome, and 18 to the Sudan-Guinea Savanna biome. 26 species of birds of Oromia are Threatened (three Critically Endangered, nine Endangered, and 14 Vulnerable), and an additional 20 species are classified as Near Threatened. International regulations affect 225 Ethiopian bird species. Of the polytypic species, a total of 620 subspecies can be taxonomically assigned to Oromia. 11 of them are endemic to Oromia, 71 to Ethiopia and 150 to the Horn of Africa. This very high diversity underlines the high responsibility of the Oromia National Regional State for bird conservation.

AEM of reaction-bonded SiC

1992 ◽  
Vol 50 (1) ◽  
pp. 344-345
Author(s):  
K Das Chowdhury ◽  
R. W. Carpenter ◽  
W. Braue
Keyword(s):  
Mechanical Properties ◽  
Phase Transformation ◽  
High Temperature ◽  
Epitaxial Growth ◽  
Liquid Silicon ◽  
Structural Ceramic ◽  
Few Data

Research on reaction-bonded SiC (RBSiC) is aimed at developing a reliable structural ceramic with improved mechanical properties. The starting materials for RBSiC were Si,C and α-SiC powder. The formation of the complex microstructure of RBSiC involves (i) solution of carbon in liquid silicon, (ii) nucleation and epitaxial growth of secondary β-SiC on the original α-SiC grains followed by (iii) β>α-SiC phase transformation of newly formed SiC. Due to their coherent nature, epitaxial SiC/SiC interfaces are considered to be segregation-free and “strong” with respect to their effect on the mechanical properties of RBSiC. But the “weak” Si/SiC interface limits its use in high temperature situations. However, few data exist on the structure and chemistry of these interfaces. Microanalytical results obtained by parallel EELS and HREM imaging are reported here.

Ultrastructural study on the development of rat amygdaloid body

1990 ◽  
Vol 48 (3) ◽  
pp. 432-433
Author(s):  
A. Manolova ◽  
S. Manolov
Keyword(s):  
Nerve Cells ◽  
Amygdaloid Complex ◽  
Amygdaloid Body ◽  
Thin Ring ◽  
Morphological Criteria ◽  
Neural Processes ◽  
Abundant Cytoplasm ◽  
Level 1 ◽  
Few Data ◽  
Oval Shape

Relatively few data on the development of the amygdaloid complex are available only at the light microscopic level (1-3). The existence of just general morphological criteria requires the performance of other investigations in particular ultrastructural in order to obtain new and more detailed information about the changes in the amygdaloid complex during development.The prenatal and postnatal development of rat amygdaloid complex beginning from the 12th embrionic day (ED) till the 33rd postnatal day (PD) has been studied. During the early stages of neurogenesis (12ED), the nerve cells were observed to be closely packed, small-sized, with oval shape. A thin ring of cytoplasm surrounded their large nuclei, their nucleoli being very active with various size and form (Fig.1). Some cells possessed more abundant cytoplasm. The perikarya were extremely rich in free ribosomes. Single sacs of the rough endoplasmic reticulum and mitochondria were observed among them. The mitochondria were with light matrix and possessed few cristae. Neural processes were viewed to sprout from some nerve cells (Fig.2). Later the nuclei were still comparatively large and with various shape.

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