Reproductive biology of spiny lobsterPanulirus regiusfrom the north-western Cape Verde Islands

2007 ◽  
Vol 29 (2) ◽  
pp. 201-208 ◽  
Author(s):  
R Freitas ◽  
A Medina ◽  
S Correia ◽  
M Castro
Keyword(s):  
Reproductive Biology ◽  
Cape Verde ◽  
Western Cape ◽  
Cape Verde Islands ◽  
The North ◽  
North Western

scholarly journals Morphological and molecular characterization of a new species of Atlantic stalked barnacle (Scalpelliformes: Pollicipedidae) from the Cape Verde Islands

2011 ◽  
Vol 91 (7) ◽  
pp. 1537-1545 ◽  
Author(s):  
Javier Quinteiro ◽  
Jorge Rodríguez-Castro ◽  
Pedro López ◽  
Luis F. López-Jurado ◽  
Nieves González-Henríquez ◽  
...  
Keyword(s):  
New Species ◽  
Charles Darwin ◽  
Taxonomic Status ◽  
Molecular Data ◽  
Cape Verde ◽  
Eastern Pacific ◽  
Cape Verde Islands ◽  
The North ◽  
North Eastern ◽  
Central Eastern

The taxonomy of pedunculate cirripedes belonging to the genus Pollicipes has essentially remained unchanged since Charles Darwin described them in his exhaustive work on the Cirripedia. This genus includes three species of stalked barnacles: Pollicipes pollicipes in the north-eastern Atlantic, P. polymerus in the north-eastern Pacific and P. elegans in the central-eastern Pacific. However, a population genetics analysis of P. pollicipes suggested the presence of a putative cryptic species collected from the Cape Verde Islands in the central-eastern Atlantic. This study examines the morphology of these genetically divergent specimens and compares them with that of representative Atlantic samples of the biogeographically closely related P. pollicipes and with the poorly described P. elegans. Molecular data, including mitochondrial COX1 and nuclear ribosomal interspaces sequences, were obtained for all species of the genus Pollicipes. Morphological distinctiveness, diagnostic characters, congruent divergence level and monophyletic clustering, at both nuclear and mitochondrial loci support the taxonomic status of this new species, Pollicipes darwini.

Further studies on trade winds during the glacial cycles

1975 ◽  
Vol 346 (1645) ◽  
pp. 245-260 ◽  
Keyword(s):  
Organic Carbon ◽  
Size Distribution ◽  
Cape Verde ◽  
Climatic Data ◽  
The South ◽  
Glacial Cycles ◽  
Cape Verde Islands ◽  
Trade Winds ◽  
The North ◽  
Quartz Grains

Core V19-301 (south of Cape Verde Islands) has been analysed in detail for (i) size distribution of quartz grains, (ii) mineralogy, (iii) colour and organic carbon (iv) G. menardii foraminifera, and (v) total foraminifera and carbonate. These results are compared with those previously obtained on core V23-100 (north of Cape Verde Islands). It is believed that the carbonate variations can be used to establish simultaneity between the cores, and thus the following climatic data emerge: ( a ) During glacial stages the trade winds were more vigorous than normal for the region north of the Cape Verdes; but the wintertime Harmattan was weaker than normal for the region south of the Cape Verdes. ( b ) The land to the north of Dakar remained desert, and was especially arid during glacials, whereas to the south of Dakar conditions oscillated between desert during interglacials, and savannah during glacials, ( c ) These wind and rainfall oscillations were more rapid and less excursive at around 0.7 Ma than they were in later glacial cycles.

scholarly journals Ventilation time scales of the North Atlantic subtropical cell revealed by coral radiocarbon from the Cape Verde Islands

2015 ◽  
Vol 30 (7) ◽  
pp. 938-948 ◽  
Author(s):  
Alvaro Fernandez ◽  
Thomas J. Lapen ◽  
Rasmus Andreasen ◽  
Peter K. Swart ◽  
Christopher D. White ◽  
...  
Keyword(s):  
Time Scales ◽  
North Atlantic ◽  
Cape Verde ◽  
Cape Verde Islands ◽  
Ventilation Time ◽  
The North ◽  
The North Atlantic ◽  
Subtropical Cell

Kamiesbergia, a new monotypic genus of the Amaryllideae-Strumariinae (Amaryllidaceae) from the north-western Cape

Bothalia ◽  
1991 ◽  
Vol 21 (2) ◽  
pp. 171-175 ◽  
Author(s):  
D. A. Snijman
Keyword(s):  
South America ◽  
Western Cape ◽  
The Novel ◽  
Monotypic Genus ◽  
The North ◽  
Granite Outcrops ◽  
Andean South America ◽  
North Western

Kamiesbergia Snijman is a new monotypic genus from raised granite outcrops in the north-western Cape. A member of the subtribe Strumariinae of the Amaryllideae, it is most closely related to  Hessea Herb, and  Namaquanula D. U. Miiller-Doblies. The dissimilar inner and outer stamens, the uniquely club-shaped inner filaments and the novel insertion of the filament in the proximal quarter of the anther connective are the main apomorphies of the genus. The number of rare and monotypic genera of Amaryllidaceae in this region is comparable to that of Andean South America.

scholarly journals Oxygen minimum zone in the North Atlantic south and east of the Cape Verde Islands

2008 ◽  
Vol 113 (C4) ◽  
Author(s):  
Lothar Stramma ◽  
Peter Brandt ◽  
Jens Schafstall ◽  
Friedrich Schott ◽  
Jürgen Fischer ◽  
...  
Keyword(s):  
North Atlantic ◽  
Oxygen Minimum Zone ◽  
Cape Verde ◽  
Cape Verde Islands ◽  
The North ◽  
Minimum Zone ◽  
The North Atlantic ◽  
Oxygen Minimum

scholarly journals The specific features of the reproductive biology of the rare species Gueldenstaedtia monophilla Fisch. (Fabaceae)

2021 ◽  
Vol 38 ◽  
pp. 00111
Author(s):  
Inessa Selyutina ◽  
Elena Konichenko ◽  
Natalia Igay ◽  
Davaajav Darikhand
Keyword(s):  
Seed Production ◽  
Reproductive Biology ◽  
Rare Species ◽  
The Real ◽  
Central Altai ◽  
The North ◽  
North Western

The seed production of the rare species Gueldenstaedtia monophylla has been investigated in 19 coenotic populations in the territories of Russia (Central Altai) and Mongolia (the north-western part). G. monophylla reproduces exclusively by seeds and is characterized by the low number and density of the plants in the populations. Its populations have a high proportion of generative plants: from 31 to 84% from the total number of the plants. The plants of G. monophylla have a small number of generative shoots, varying from 1 to 6 per plant. The number of flowers on the plants is low, too, and varies in the populations on average from 1.2 to 15.3 per plant. The potential seed production (PSP) varies considerably from 13.5 to 308.6 ovules per plant. The real seed production is much lower, to constitute from 6.2 to 74.5 seeds per plant. The low seed production, fructification that occurs not every year, and scanty populations make the species vulnerable.

The distribution and abundance of the estuarine crocodile, Crocodylus porosus, in Queensland

2004 ◽  
Vol 31 (5) ◽  
pp. 527 ◽  
Author(s):  
Mark A. Read ◽  
Jeffrey D. Miller ◽  
Ian P. Bell ◽  
Adam Felton
Keyword(s):  
Relative Density ◽  
National Park ◽  
Western Cape ◽  
Survey Period ◽  
The North ◽  
Crocodylus Porosus ◽  
Biogeographic Regions ◽  
Cape York ◽  
The Mean ◽  
North Western

A total of 6444 Crocodylus porosus (4303 non-hatchlings and 2141 hatchlings) were recorded during 196 vessel-based surveys of 103 waterways to determine the distribution and abundance of Crocodylus porosus in Queensland. The surveys, conducted from January 1994 to December 2000, covered 4174.3 km of waterway. Population structure was biased towards immature crocodiles, with 91% of all animals sighted being less than the minimum breeding size for individuals in the Northern Territory. The mean relative density of non-hatchling C. porosus was highest in waterways of north-western Cape York Peninsula and Lakefield National Park, and lowest for waterways along the populated east coast of Queensland. The highest numbers of hatchlings were recorded from waterways of north-western Cape York Peninsula, where nearly 74% of all hatchlings were recorded during the seven-year survey period. The C. porosus population in northern Queensland appears to be undergoing a limited recovery, with marginal increases in the mean relative density of non-hatchlings in seven of the eight crocodile biogeographic regions. On the basis of the distribution and abundance of hatchling and non-hatchling crocodiles, the north-western Cape York Peninsula region contains the best habitat for C. porosus in Queensland, particularly in the Wenlock River and Tentpole Creek area.

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