scholarly journals Contribution to the reproduction of Ruditapes decussatus in Oualidia lagoon and Dakhla bay (North West African Atlantic Coast)

2018 ◽  
Vol 5 ◽  
Author(s):  
Kaoutar HIMMI ◽  
Oum Keltoum BELHSEN ◽  
Mohamed ID HALLA ◽  
Yassine OUAGAJJOU ◽  
El Mustapha AIT CHATTOU ◽  
...  
Keyword(s):  
Atlantic Coast ◽  
West African ◽  
Ruditapes Decussatus ◽  
North West ◽  
Oualidia Lagoon ◽  
Dakhla Bay ◽  
African Atlantic

Metal content in Mullus surmuletus in the Canary Islands (North-West African Atlantic)

2019 ◽  
Vol 26 (20) ◽  
pp. 21044-21051 ◽  
Author(s):  
Enrique Lozano-Bilbao ◽  
Raquel Viñé ◽  
Gonzalo Lozano ◽  
Arturo Hardisson ◽  
Carmen Rubio ◽  
...  
Keyword(s):  
Canary Islands ◽  
Metal Content ◽  
West African ◽  
North West ◽  
Mullus Surmuletus ◽  
African Atlantic

Turbidite depositional architecture across three interconnected deep-water basins on the north-west African margin

Sedimentology ◽  
2002 ◽  
Vol 49 (4) ◽  
pp. 669-695 ◽  
Author(s):  
Russell B. Wynn ◽  
Philip P. E. Weaver ◽  
Douglas G. Masson ◽  
Dorrik A. V. Stow
Keyword(s):  
Deep Water ◽  
West African ◽  
North West ◽  
The North ◽  
Depositional Architecture

Atmospheric synoptic conditions associated with the initiation of north-west African depressions

1990 ◽  
Vol 10 (7) ◽  
pp. 711-729 ◽  
Author(s):  
N. G. Prezerakos ◽  
S. C. Michaelides ◽  
A. S. Vlassi
Keyword(s):  
West African ◽  
North West ◽  
Synoptic Conditions

scholarly journals Ecological Niche Models Reveal Climate Change Effect on Biogeographical Regions: The Iberian Peninsula as a Case Study

Climate ◽  
2020 ◽  
Vol 8 (3) ◽  
pp. 42 ◽  
Author(s):  
Diana Sousa-Guedes ◽  
Salvador Arenas-Castro ◽  
Neftalí Sillero
Keyword(s):  
Iberian Peninsula ◽  
Environmental Conditions ◽  
Atlantic Coast ◽  
Group Method ◽  
Ecological Niche Models ◽  
North West ◽  
Pair Group ◽  
Climate Change Effect ◽  
Biogeographical Regions ◽  
Over Time

How species are distributed on Earth depends largely on climate factors. Whenever these environmental conditions change, species tend to shift their distributions to reach more favourable conditions. Distinct sets of species similarly distributed (i.e., chorotypes) occur in biogeographical regions with homogeneous environmental conditions. Here, we analysed whether biogeographical regions are unstable over time (from the past to the future). We modelled the realised niche of amphibians and reptiles in the Iberian Peninsula in the present, and several past and future climate scenarios. Then, we used Jaccard’s index and the unweighted pair group method (UPGMA) to define the biogeographical regions. Our results suggest that the biogeographical regions of Iberian amphibians and reptiles changed greatly over time, due to the climatic changes between periods. Biogeographical regions composed of species with Atlantic affinities changed particularly, overall gaining suitable areas in past colder periods and losing suitable areas in warmer periods. The areas of refugia for amphibians over time corresponded to the most humid regions (north-west of the peninsula), while the most important areas for reptiles occur in the south and on the Atlantic coast. The identification of biogeographical patterns considering past climate changes is essential to better apply conservation measures.

A new species of the genus Celleporella (Bryozoa: Cheilostomatida) from the European Atlantic Coast

1999 ◽  
Vol 79 (1) ◽  
pp. 51-55 ◽  
Author(s):  
J. César-Aldariz ◽  
E. Fernández-Pulpeiro ◽  
O. Reverter-Gil
Keyword(s):  
New Species ◽  
Atlantic Coast ◽  
North West ◽  
A New Species

A new species of the genus Celleporella (Celleporella galaica sp. nov.) is described from material collected in Galicia (north-west Spain).

Age and growth of the squid Todaropsis eblanae (Cephalopoda: Ommastrephidae) on the north-west African shelf

2000 ◽  
Vol 80 (4) ◽  
pp. 747-748 ◽  
Author(s):  
Alexander I. Arkhipkin ◽  
Vladimir V. Laptikhovsky
Keyword(s):  
High Growth ◽  
West African ◽  
Age And Growth ◽  
Length Frequency ◽  
Annual Life Cycle ◽  
Frequency Distributions ◽  
North West ◽  
The North ◽  
West African Coast ◽  
African Coast

Length composition, maturation and growth of the ommastrephid squid Todaropsis eblanae were studied using length–frequency distributions (LFDs) and statoliths of squid caught off the north-west African coast. Length–frequency distributions were quite similar in all seasons studied, indicating all year round spawning. However, both high proportions of mature squid in the winter and the hatching peak of squid from our sample in spring suggested the winter–spring peak of spawning. Immature and maturing squid had rather high growth rates, attaining 140—150 mm of dorsal mantle length (ML) by the age of 160—170 d. Todaropsis eblanae is likely to have an annual life cycle on the north-west African shelf.

Social Administration of the Kru. A Preliminary Survey

Africa ◽  
1937 ◽  
Vol 10 (1) ◽  
pp. 75-96 ◽  
Author(s):  
H. Scudder Mekeel
Keyword(s):  
West Africa ◽  
West African ◽  
Preliminary Survey ◽  
The South ◽  
North West ◽  
North East ◽  
The North ◽  
Archaeological Work ◽  
Opening Paragraph ◽  
Physical Type

Opening ParagraphThe Kru, a West African Negro group, inhabit the central and southern part of Liberia. They are surrounded by the Basa peoples to the north-west, by the Grebo to the south-east and by the Putu to the north-east. The informant, Thomas Tarbour (Sieh Tagbweh), from whom the following material was derived, was a native of Grand Cess (Siglipo), a large coast town near the border of the Grebo country. The Kru, along with other related groups in that part of West Africa, have a tradition of having migrated from far to the north-east. The physical type is that of the short, stocky Bush negro. No archaeological work has been done in the region, and such ethnological material as has been collected is a mere beginning.

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