scholarly journals Growth and population structure of Paracentrotus lividus (Echinodermata:Echinoidea) in two contrasting habitats

1995 ◽  
Vol 122 ◽  
pp. 193-204 ◽  
Author(s):  
X Turon ◽  
G Giribet ◽  
S López ◽  
C Palacín
Keyword(s):  
Population Structure ◽  
Paracentrotus Lividus ◽  
Contrasting Habitats

Genetic diversity and population structure of the commercially harvested sea urchin Paracentrotus lividus (Echinodermata, Echinoidea)

2004 ◽  
Vol 13 (11) ◽  
pp. 3317-3328 ◽  
Author(s):  
SANDRA DURAN ◽  
CRUZ PALACÍN ◽  
MIKEL A. BECERRO ◽  
XAVIER TURON ◽  
GONZALO GIRIBET
Keyword(s):  
Genetic Diversity ◽  
Population Structure ◽  
Sea Urchin ◽  
Paracentrotus Lividus

scholarly journals Reproductive biology of Paracentrotus lividus (Echinodermata: Echinoidea) in two contrasting habitats of northern Tunisia (south-east Mediterranean)

2007 ◽  
Vol 87 (3) ◽  
pp. 763-767 ◽  
Author(s):  
Fériel Sellem ◽  
Monique Guillou
Keyword(s):  
Sea Urchin ◽  
Reproductive Strategies ◽  
Sea Urchins ◽  
Feeding Activity ◽  
Paracentrotus Lividus ◽  
Mature Stage ◽  
Breeding Period ◽  
Northern Tunisia ◽  
Sheltered Site ◽  
Contrasting Habitats

The reproductive strategies of the sea urchin, Paracentrotus lividus, were studied in the Bay of Tunis. Samples were collected monthly, from September 1993 to August 1995, in two sites which differ in their marine vegetation and their exposure to wave action. Histological examination demonstrated a cycle of gametogenesis with six reproductive stages and a main breeding period occurring between April and June. Gonad indices varied between sites and years, the sheltered site presenting a higher investment in reproduction.This difference was essentially induced by the largest sea urchins (above 40 mm in diameter). Repletion indices showed a clear pattern without difference between sites and years. The sea urchin increase in feeding activity was controlled by the need to allocate nutrient to the gonad during the mature stage. But the gonad investment was not correlated with the intensity of food intake. Hydrodynamic conditions might play a key role in diverting energy to the maintenance in an exposed environment at the expense of reproduction.

Population structure and adult plant performance of forest herbs in three contrasting habitats

Ecography ◽  
2004 ◽  
Vol 27 (2) ◽  
pp. 225-241 ◽  
Author(s):  
Patrick Endels ◽  
Dries Adriaens ◽  
Kris Verheyen ◽  
Martin Hermy
Keyword(s):  
Population Structure ◽  
Plant Performance ◽  
Adult Plant ◽  
Forest Herbs ◽  
Contrasting Habitats

Variation of Loranthaceae impact onVitellaria paradoxaC. F. Gaertn. fruit yield in contrasting habitats and implications for its conservation

Fruits ◽  
2013 ◽  
Vol 68 (2) ◽  
pp. 109-120 ◽  
Author(s):  
Thierry D. Houehanou ◽  
Valentin Kindomihou ◽  
Tariq Stevart ◽  
Brice Tente ◽  
Marcel Houinato ◽  
...  
Keyword(s):  
Fruit Yield ◽  
Contrasting Habitats
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