Abundance, distribution and behaviour of common dolphins, Delphinus spp., off north-eastern Venezuela: implications for conservation and management

2009 ◽  
Vol 90 (8) ◽  
pp. 1623-1631 ◽  
Author(s):  
Lenin Oviedo ◽  
María Alejandra Esteves ◽  
Romina Acevedo ◽  
Noemi Silva ◽  
Jaime Bolaños-Jiménez ◽  
...  
Keyword(s):  
Trophic Ecology ◽  
Coastal Upwelling ◽  
Current Status ◽  
Eastern Coast ◽  
Line Transect ◽  
North East ◽  
The North ◽  
Wide Range ◽  
North Eastern ◽  
Common Dolphins

The north-eastern coast of Venezuela hosts a high diversity of megafauna, particularly related with high productivity due to coastal upwelling. This area is mainly characterized by the existence of the primary fisheries in Venezuela, mostly supported by a great abundance of small pelagic species. This would explain why the area supports a wide range of marine top predators, including cetaceans. The current status of cetacean populations off north-eastern Venezuela is uncertain, mainly because research efforts have been very sparse. There are still many gaps of information in cetacean biology to establish a solid baseline that can be used for management decisions. Common dolphins (Delphinus spp.) are widely dispersed over the whole north-east basin, including waters off Araya and Paria Peninsula and around Margarita, Coche and Cubagua Islands. Areas of higher densities for Delphinus spp. coincide with the focal location of sardine fisheries and the most-active upwelling on the north-eastern coast. Therefore, a scheme of management should consider the areas of major productivity along the coast as potential critical habitat for the species. Further data collection is recommended, increasing aspects such as trophic ecology and the continuity of behavioural sampling, paired with systematic line transect estimation.

A Review of Institutional and Developmental Issues in North-East India

2020 ◽  
Vol 66 (2) ◽  
pp. 206-218
Author(s):  
Nicodim Basumatary ◽  
Bhagirathi Panda
Keyword(s):  
Rule Of Law ◽  
Institutional Factors ◽  
Eastern Region ◽  
Political Issues ◽  
Developmental Issues ◽  
North East India ◽  
North East ◽  
The North ◽  
Wide Range ◽  
North Eastern

Developmental issues of the North-Eastern States of India cannot be studied inisolation without accounting for the varied politico-socio-economic and institutional factors. This study covers a wide range of the socio-political issues and developmental gaps in the North-Eastern Region (NER) of India. It presents a broader picture and gives an understanding of the issues of governance and development prevailing in this region. Many issues pertain to paucity of developmental outcomes, ethnicity, demand for statehood, insurgency, absence of rule of law, corruption and so on, suggesting state’s ineffectiveness and people’s incompetence to take development to the front stage. An effort has also been made to trace the literature that deals with these issues.

XVII.—The Geology of Gigha

1927 ◽  
Vol 55 (2) ◽  
pp. 395-409
Author(s):  
W. J. McCallien
Keyword(s):  
Eastern Coast ◽  
Western Coast ◽  
Main Island ◽  
North East ◽  
The North ◽  
South West ◽  
Nearest Point ◽  
North Eastern ◽  
As If

Gigha is a little-visited island off the western coast of Kintyre and between the latter and the island of Islay. It lies about 5¼ miles south-west of West Loch Tarbert, and a little over 1½ miles from the nearest point of Kintyre where the mainland runs out for 1½ miles in the low, sandy, raised beach of Runahaorine (figs. 1 and 10).The island is 6 miles in length from north-east to south-west, and has a greatest breadth of 2 miles. All round it are innumerable smaller isles, all elongated in the same direction as Gigha. Of these the most important are Cara, 1 mile from north-east to south-west by ½ mile in breadth, and Gigalum, ½ mile by ⅕ mile, and Craro, which is smaller still (figs. 2 and 10). The island forming Ardminish Point, on the eastern coast of Gigha, and Eilean Garbh, at the north-eastern end, will be dealt with here as if they were part of the main island, since at low tide they are connected with it by sandy isthmuses.

scholarly journals On the inference of a southern origin of the North American firefly Photinus pyralis

2019 ◽  
Author(s):  
Ana Catalán ◽  
Sebastian Höhna ◽  
Sarah E. Lower ◽  
Pablo Duchen
Keyword(s):  
North American ◽  
Eastern Coast ◽  
Ecological Niches ◽  
Photinus Pyralis ◽  
The North ◽  
Ideal System ◽  
Wide Range ◽  
North Eastern ◽  
Demographic Inference ◽  
Population Demographic

AbstractThe firefly Photinus pyralis inhabits a wide range of latitudinal and ecological niches, with populations living from temperate to tropical habitats. Its ample geographic distribution makes this species an ideal system for the study of local adaptation and demographic inference of wild populations. Therefore, in this study we modelled and inferred different demographic scenarios for North American populations of P. pyralis, collected from Texas to New Jersey. To do this, we used a combination of ABC techniques (for multi-population/colonization analyses), and likelihood inference (dadi) for single-population demographic inference, which proved useful with our RAD data.We uncovered that the most ancestral North American population lays in Texas, which further colonized the Central region of the US and more recently the North Eastern coast. Our study confidently rejects a demographic scenario where the North Eastern populations colonized more southern populations until reaching Texas. Our results suggest that P. pyralis originated in Central- or South America, followed by migration events that populated northern latitudes. Finally, modelling the demographic history of North American P. pyralis serves as a null model of nucleotide diversity patterns, which will inform future studies of adaptation, not only in P. pyralis, but also in other North American taxa.

scholarly journals Traditional Muga Silk (Antheraea assamensis) Rearing as a Means of Rural Livelihood and Conservation Efforts among the Indigenous Communities of Assam

2021 ◽  
Vol 8 (7) ◽  
pp. 55-68
Author(s):  
Dr. Niranjan Das
Keyword(s):  
Geographical Area ◽  
Indigenous Communities ◽  
Eastern Region ◽  
North East ◽  
The North ◽  
Brahmaputra Valley ◽  
Rural Livelihood ◽  
Wide Range ◽  
North Eastern ◽  
Antheraea Assamensis

The Muga silk (Antheraea assamensis) rearing is confined to the North-East India, particularly, the Brahmaputra valley of Assam. This is perhaps, due to pleasant climatic conditions and distribution of wide range of muga host plants in this region. In Assam ‘Som’ tree provides the principal food for muga silkworms which produce the golden coloured silk that is very specific and prestigious to north-eastern states of India and found nowhere else on the globe. The north-eastern region of India, with total geographical area of 3,04,426 sq km, is situated in eastern part of India. It lies between 21.33 to 29.28° N. latitudes and 89.42 to 97.24° E. longitudes. The region is a part of eastern Himalaya biodiversity hotspot in the world hence endow with endemic flora and fauna. In this paper the researcher tries to the possibility of traditional way of rearing of muga, rural livelihood and conservation effort among the indigenous communities of the Brahmaputra valley in Assam.

The influence of submesoscale eddies on hydrochemical parameters and structural and functional characteristics of phytoplankton in the north-eastern part of the Black Sea

2019 ◽  
pp. 24-40
Author(s):  
Sergey B. Kuklev ◽  
Vladimir A. Silkin ◽  
Valeriy K. Chasovnikov ◽  
Andrey G. Zatsepin ◽  
Larisa A. Pautova ◽  
...  
Keyword(s):  
Anticyclonic Eddy ◽  
The Black Sea ◽  
Hydrochemical Parameters ◽  
North East ◽  
The North ◽  
Seasonal Thermocline ◽  
North Eastern ◽  
Quantitative Indicators ◽  
The City ◽  
North Eastern Part

On June 7, 2018, a sub-mesoscale anticyclonic eddy induced by the wind (north-east) was registered on the shelf in the area of the city of Gelendzhik. With the help of field multidisciplinary expedition ship surveys, it was shown that this eddy exists in the layer above the seasonal thermocline. At the periphery of the eddy weak variability of hydrochemical parameters and quantitative indicators of phytoplankton were recorded. The result of the formation of such eddy structure was a shift in the structure of phytoplankton – the annual observed coccolithophores bloom was not registered.

Taxonomy of Nystiellidae (Caenogastropoda, Epitonioidea) from Brazil, with description of three new species from the South-western Atlantic

2017 ◽  
Vol 98 (7) ◽  
pp. 1619-1644 ◽  
Author(s):  
Alexandre Dias Pimenta ◽  
Bruno Garcia Andrade ◽  
Ricardo Silva Absalão
Keyword(s):  
Rio Grande ◽  
Taxonomic Revision ◽  
South Atlantic ◽  
Shell Morphology ◽  
The South ◽  
Western Atlantic ◽  
North East ◽  
The North ◽  
Eastern Brazil ◽  
North Eastern

A taxonomic revision of the Nystiellidae from Brazil, including samples from the Rio Grande Rise, South Atlantic, was performed based on shell morphology. Five genera and 17 species were recognized. For the richest genus,Eccliseogyra, the three species previously recorded from Brazil were revised:E. brasiliensisandE. maracatu, previously known only from their respective type series, were re-examined. Newly available material ofE. maracatuexpanded the known geographic range of this species to off south-east Brazil.Eccliseogyra nitidais now recorded from north-eastern to south-eastern Brazil, as well as from the Rio Grande Rise. Three species ofEccliseogyraare newly recorded from the South Atlantic:E. monnioti, previously known from the north-eastern Atlantic, occurs off eastern Brazil and on the Rio Grande Rise; its protoconch is described for the first time, confirming its family allocation.Eccliseogyra pyrrhiasoccurs off eastern Brazil and on the Rio Grande Rise, andE. folinioff eastern Brazil. The genusIphitusis newly recorded from the South Atlantic.Iphitus robertsiwas found off northern Brazil, although the shells show some differences from the type material, with less-pronounced spiral keels. Additional new finds showed thatIphitus cancellatusranges from eastern Brazil to the Rio Grande Rise, and Iphitusnotiossp. nov. is restricted to the Rio Grande Rise.Narrimania, previously recorded from Brazil based on dubious records, is confirmed, including the only two living species described for the genus:N. azelotes, previously only known from the type locality in Florida, andN. concinna, previously known from the Mediterranean. A third species,Narrimania raquelaesp. nov. is described from eastern Brazil, diagnosed by its numerous and thinner cancellate sculpture. To the three species ofOpaliopsispreviously known from Brazil, a fourth species,O. arnaldoisp. nov., is added from eastern Brazil, and diagnosed by its very thin spiral sculpture, absence of a varix, and thinner microscopic parallel axial striae.Papuliscala nordestina, originally described from north-east Brazil, is recorded off eastern Brazil and synonymized withP. elongata, a species previously known only from the North Atlantic.

scholarly journals The geology of the north-eastern corner of Greenland - photogeological studies and 1993 field work

1994 ◽  
Vol 161 ◽  
pp. 21-33
Author(s):  
H.F Jepsen ◽  
J.C Escher ◽  
J.D Friderichsen ◽  
A.K Higgins
Keyword(s):  
Field Work ◽  
Tectonic Activity ◽  
Mobile Belt ◽  
North East ◽  
The North ◽  
Upper Proterozoic ◽  
North Eastern ◽  
Field Season ◽  
Upper Boundary ◽  
Middle Proterozoic

Late Archaean and Early Proterozoic crust-forming events in North-East and eastern North Greenland were succeeded by Middle Proterozoic sedimentation and volcanic activity; Late Proterozoic through Tertiary sedimentation was interrupted by several periods of tectonic activity, including the Caledonian orogeny in East Greenland and the Mesozoic deformation of the Wandel Hav mobile belt. Photogeological studies helped pinpoint areas of special interest which were investigated during the short 1993 field season. Insights gained during field work include: the nature of the crystalline basement terrain in the Caledonian fold belt, redefinition of the upper boundary of the Upper Proterozoic Rivieradal sandstones, revision of Caledonian nappe terminology, and the northern extension of the Caledonian Storstrømmen shear zone.

The Comparative Feeding Ecology of Six Species of Shark and Four Species of Ray (Elasmobranchii) In The North-East Atlantic

1996 ◽  
Vol 76 (1) ◽  
pp. 89-106 ◽  
Author(s):  
J.R. Ellis ◽  
M.G. Pawson ◽  
S.E. Shackley
Keyword(s):  
Feeding Ecology ◽  
Stomach Contents ◽  
Generalist Predators ◽  
Dietary Overlap ◽  
East Atlantic ◽  
Dietary Breadth ◽  
North East ◽  
The North ◽  
North Eastern ◽  
Commercial Species

The stomach contents of ten species of elasmobranch from the north-eastern Atlantic indicate that most are generalist predators, eating a variety of polychaetes, molluscs, crustaceans and teleosts. Two species, Mustelus asterias and Squatina scjuatina were found to be specialist feeders, consuming portunid crabs and pleuronectids, respectively. Measures for both dietary breadth and dietary overlap are given and the implications of elasmobranch predation on the prey communities and on commercial species are discussed.

scholarly journals Geomorphology of the north-eastern coast of Gozo (Malta, Mediterranean Sea)

2018 ◽  
Vol 14 (2) ◽  
pp. 402-410 ◽  
Author(s):  
Mariacristina Prampolini ◽  
Christopher Gauci ◽  
Anton S. Micallef ◽  
Lidia Selmi ◽  
Vittoria Vandelli ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Eastern Coast ◽  
The North ◽  
North Eastern

Baskinta and Bqaatouta: Two new early Barremian fossiliferous amber outcrops from Central Lebanon

2021 ◽  
Vol 4 (4) ◽  
Author(s):  
SIBELLE MAKSOUD ◽  
MOUNIR MAALOUF ◽  
RAMY MAALOUF ◽  
DANY AZAR
Keyword(s):  
Eastern Coast ◽  
The North ◽  
North Eastern

Two new fossiliferous amber outcrops in the heights of Baskinta and Bqaatouta (El-Maten and Kesserouan districts, Central Lebanon) are described. These new discoveries constitute respectively the 27th and 28th amber outcrops with biological inclusions in Lebanon, enrich and improve our knowledge about the palaeobiodiversity and palaeoenvironment of the North-Eastern coast of Gondwana during the early Barremian.

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