scholarly journals Diet of Cataglyphis bicolor (Hymenoptera-Formicidae) in an insular condition in north-eastern Algeria

2019 ◽  
pp. 120-130
Author(s):  
Anissa Henine-Maouche ◽  
Lyes Aissat ◽  
Riadh Moulaï
Keyword(s):  
Prey Species ◽  
Prey Availability ◽  
Eastern Coast ◽  
The North ◽  
North Eastern ◽  
Pheidole Pallidula ◽  
Station Pair ◽  
Eastern Algeria ◽  
Sahel Region ◽  
Cataglyphis Bicolor

A study of the adaptation of the ant Cataglyphis bicolor in terms of feeding under insular conditions was conducted on the north-eastern coast of Algeria. For this, three pairs of stations (island-continent) were chosen. Analyzing fragments of prey species found in C. bicolor nests, the diet in each station pair was studied. The results obtained indicate that C. bicolor has an opportunistic diet characterised by insectivory. Indeed, more than 95% of the prey consumed in the six study stations were insects with a clear preference for other ants, with frequencies ranging from 52 to 87%. Among the latter, Messor barbarus, Camponotus sp., Camponotus laurenti, Pheidole pallidula and Tetramorium biskrense were the ants most predated by C. bicolor. The diversity of continental prey seemed greater than that of island environments. For the two Cap Sigli stations, the prey richness was 94 species for the continent against only 28 species for the island environment. For Boulimat, there were 27 prey species for the mainland and 20 prey species for the islet. Finally, for the Sahel region, C. bicolor was able to harvest 42 prey species on the mainland and 28 species on the island. The diversity of C. bicolor prey in the island environments seems to be a function of insect richness (prey availability) and floral richness.

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.

scholarly journals Morphological description of six species of Suberitida (Porifera: Demospongiae) from the unexplored north-eastern coast of Brazil, with emphasis on two new species

2020 ◽  
Vol 100 (3) ◽  
pp. 389-400
Author(s):  
Humberto F. M. Fortunato ◽  
Thierry Pérez ◽  
Gisele Lôbo-Hajdu
Keyword(s):  
Current Knowledge ◽  
Atlantic Coast ◽  
Marine Sponges ◽  
Eastern Coast ◽  
Morphological Description ◽  
Brazilian Coast ◽  
Northern Coast ◽  
Western Atlantic ◽  
The North ◽  
North Eastern

AbstractThe Order Suberitida is defined as a group of marine sponges without an obvious cortex, a skeleton devoid of microscleres, and with a deletion of a small loop of 15 base pairs in the secondary structure of the 28S rDNA as a molecular synapomorphy. Suberitida comprises three families and 26 genera distributed worldwide, but mostly in temperate and polar waters. Twenty species were reported along the entire Brazilian coast, and although the north-eastern coast of Brazil seems to harbour a rich sponge fauna, our current knowledge is concentrated along the south-eastern Atlantic coast. A survey was implemented along the northern coast of Brazil, and the collection allowed the identification of six species belonging to the Order Suberitida. Two of them are considered new to science: Suberites purpura sp. nov., Hymeniacidon upaonassu sp. nov., and four, Halichondria (Halichondria) marianae Santos, Nascimento & Pinheiro, 2018, Halichondria (H.) melanadocia de Laubenfels, 1936, Suberites aurantiacus (Duchassaing & Michelotti, 1864), and Terpios fugax Duchassaing & Michelotti, 1864, are re-described. Taxonomic comparisons are made for Tropical Western Atlantic species and type species of the four genera. Finally, an identification key for the Western Atlantic Suberites species is provided.

scholarly journals The sensitivity of the Arctic sea ice to orbitally induced insolation changes: a study of the mid-Holocene Paleoclimate Modelling Intercomparison Project 2 and 3 simulations

2013 ◽  
Vol 9 (2) ◽  
pp. 969-982 ◽  
Author(s):  
M. Berger ◽  
J. Brandefelt ◽  
J. Nilsson
Keyword(s):  
Sea Ice ◽  
Arctic Sea Ice ◽  
The Arctic ◽  
Eastern Coast ◽  
Sea Ice Extent ◽  
The North ◽  
Arctic Sea ◽  
North Eastern ◽  
Intercomparison Project ◽  
Insolation Change

Abstract. In the present work the Arctic sea ice in the mid-Holocene and the pre-industrial climates are analysed and compared on the basis of climate-model results from the Paleoclimate Modelling Intercomparison Project phase 2 (PMIP2) and phase 3 (PMIP3). The PMIP3 models generally simulate smaller and thinner sea-ice extents than the PMIP2 models both for the pre-industrial and the mid-Holocene climate. Further, the PMIP2 and PMIP3 models all simulate a smaller and thinner Arctic summer sea-ice cover in the mid-Holocene than in the pre-industrial control climate. The PMIP3 models also simulate thinner winter sea ice than the PMIP2 models. The winter sea-ice extent response, i.e. the difference between the mid-Holocene and the pre-industrial climate, varies among both PMIP2 and PMIP3 models. Approximately one half of the models simulate a decrease in winter sea-ice extent and one half simulates an increase. The model-mean summer sea-ice extent is 11 % (21 %) smaller in the mid-Holocene than in the pre-industrial climate simulations in the PMIP2 (PMIP3). In accordance with the simple model of Thorndike (1992), the sea-ice thickness response to the insolation change from the pre-industrial to the mid-Holocene is stronger in models with thicker ice in the pre-industrial climate simulation. Further, the analyses show that climate models for which the Arctic sea-ice responses to increasing atmospheric CO2 concentrations are similar may simulate rather different sea-ice responses to the change in solar forcing between the mid-Holocene and the pre-industrial. For two specific models, which are analysed in detail, this difference is found to be associated with differences in the simulated cloud fractions in the summer Arctic; in the model with a larger cloud fraction the effect of insolation change is muted. A sub-set of the mid-Holocene simulations in the PMIP ensemble exhibit open water off the north-eastern coast of Greenland in summer, which can provide a fetch for surface waves. This is in broad agreement with recent analyses of sea-ice proxies, indicating that beach-ridges formed on the north-eastern coast of Greenland during the early- to mid-Holocene.

Population genetics of two tropical sharks, Carcharhinus tilstoni and C. sorrah, in Northern Australia

1989 ◽  
Vol 40 (5) ◽  
pp. 541 ◽  
Author(s):  
S Lavery ◽  
JB Shaklee
Keyword(s):  
Eastern Coast ◽  
Population Subdivision ◽  
Starch Gel Electrophoresis ◽  
Northern Australia ◽  
Tissue Samples ◽  
North West ◽  
The North ◽  
North Eastern ◽  
Starch Gel ◽  
Sufficient Variation

The genetic structure of the Australian populations of Carcharhinus tilstoni and C. sorrah was investigated by starch gel electrophoresis. Tissue samples were taken from 1580 sharks from throughout the fishery, which extends from the North-West Shelf (off Western Australia) to the north-eastern coast of Queensland. From a total of 47 enzyme loci screened in each species, 13 proved to be polymorphic (P0.99) for at least one species, with only 5 loci for each species showing sufficient variation (P0.95) to be of use in the analysis of population structure. Mean heterozygosity values were relatively low: 0.037 for C. tilstoni and 0.035 for C. sorrah. A low level of population subdivision was found within each species, with FST values of 0.0094 for C. tilstoni and 0.0076 for C. sorrah. There was insufficient evidence to suggest that there is more than one population of either species of shark in Australian waters.

scholarly journals Feeding ecology of Anableps anableps (Actinopterygii: Cyprinodontiformes: Anablepidae) off the north-eastern coast of Brazil

2019 ◽  
Vol 49 (3) ◽  
pp. 213-219
Author(s):  
Marina Figueiredo ◽  
Jorge Nunes ◽  
Zafira Almeida ◽  
Alexsandra Paz ◽  
Nivaldo Piorski ◽  
...  
Keyword(s):  
Feeding Ecology ◽  
Eastern Coast ◽  
The North ◽  
North Eastern

scholarly journals Fortress of ‘Godlik’ in the system of mediaeval fortifications on the Black Sea coast of Greater Sochi

2020 ◽  
Vol 28 ◽  
pp. 406-421
Author(s):  
Bronislava Ovchinnikova ◽  
Keyword(s):  
Black Sea ◽  
Eastern Coast ◽  
The Black Sea ◽  
State University ◽  
The North ◽  
Field Investigations ◽  
Black Sea Coast ◽  
North Eastern ◽  
A Site ◽  
The City

This article is devoted to results of field investigations at the fortress of ‘Godlik’ conducted by the Loo archaeological expedition of the Ural State University in 1992–1996. This fortress is part of the system of mediaeval defensive installations situated on the north-eastern coast of the Black Sea and is located near the modern urban settle- ment of Lazarevskoye in the city of Sochi. The fortress is a site highly complicated for investigations presenting the ruins of an old fortification where the cultural layer in the court of the fort is practically annihilated.

Kfar Selouan: A new early Barremian fossiliferous amber outcrop from Lebanon

2021 ◽  
Vol 4 (3) ◽  
Author(s):  
SIBELLE MAKSOUD ◽  
OMAR T. ZAIDAN ◽  
DANY AZAR
Keyword(s):  
Eastern Coast ◽  
The North ◽  
North Eastern ◽  
New Discovery

A new fossiliferous amber outcrop in the heights of Kfar Selouan (Mount El-Kneisseh, Central Lebanon) is described. This new discovery constitutes the 26th amber outcrop with biological inclusions in Lebanon, and open doors to our knowledge about the palaeobiodiversity and palaeoenvironment of the North-Eastern coast of Gondwana during the early Barremian.

Sign in / Sign up

Export Citation Format

Share Document