scholarly journals Endogenous Substrates for Energy Metabolism in Spermatozoa of the Sea Urchins Arbacia lixula and Paracentrotus lividus

1994 ◽  
Vol 186 (3) ◽  
pp. 285-290 ◽  
Author(s):  
M. Mita ◽  
A. Oguchi ◽  
S. Kikuyama ◽  
I. Yasumasu ◽  
R. De Santis ◽  
...  
Keyword(s):  
Energy Metabolism ◽  
Sea Urchins ◽  
Paracentrotus Lividus ◽  
Endogenous Substrates ◽  
Arbacia Lixula

scholarly journals Contrasting recruitment seasonality of sea urchin species in Gran Canaria, Canary Islands (eastern Atlantic)

2014 ◽  
Vol 15 (3) ◽  
pp. 475 ◽  
Author(s):  
S. GARCIA-SANZ ◽  
P. G. NAVARRO ◽  
F. TUYA
Keyword(s):  
Community Structure ◽  
Seasonal Variation ◽  
Sea Urchin ◽  
Sea Urchins ◽  
Late Summer ◽  
Paracentrotus Lividus ◽  
Abundant Species ◽  
Late Winter ◽  
Gran Canaria ◽  
Arbacia Lixula

Despite sea-urchins can play an important role affecting the community structure of subtidal bottoms, factors controlling the dynamics of sea-urchin populations are still poorly understood. We assessed the seasonal variation in recruitment of three sea-urchin species (Diadema africanum, Paracentrotus lividus and Arbacia lixula) at Gran Canaria Island (eastern Atlantic) via monthly deployment of artificial collectors throughout an entire annual cycle on each of four adjacent habitat patches (seagrasses, sandy patches, ‘urchin-grazed’ barrens and macroalgal-dominated beds) within a shallow coastal landscape. Paracentrotus lividus and A. lixula had exclusively one main recruitment peak in late winter-spring. Diadema africanum recruitment was also seasonal, but recruits appeared in late summer-autumn, particularly on ‘urchin-grazed’ barrens with large abundances of adult conspecifics. In conclusion, this study has demonstrated non-overlapping seasonal recruitment patterns of the less abundant species (P. lividus and A. lixula) with the most conspicuous species (D. africanum) in the study area.

scholarly journals Sea urchin response to rising pCO2 shows ocean acidification may fundamentally alter the chemistry of marine skeletons

2014 ◽  
Vol 15 (3) ◽  
pp. 510 ◽  
Author(s):  
L. BRAY ◽  
M.A. PANCUCCI-PAPADOPOULOU ◽  
J. M. HALL-SPENCER
Keyword(s):  
Ocean Acidification ◽  
Species Interactions ◽  
Sea Urchins ◽  
Marine Ecosystem ◽  
Aegean Sea ◽  
Paracentrotus Lividus ◽  
Low Ph ◽  
Reference Sites ◽  
Coastal Systems ◽  
Arbacia Lixula

Ocean acidification caused by an increase in pCO2 is expected to drastically affect marine ecosystem composition, yet there is much uncertainty about the mechanisms through which ecosystems may be affected. Here we studied sea urchins that are common and important grazers in the Mediterranean (Paracentrotus lividus and Arbacia lixula). Our study included a natural CO2 seep plus reference sites in the Aegean Sea off Greece. The distribution of A. lixula was unaffected by the low pH environment, whereas densities of P. lividus were much reduced. There was skeletal degradation in both species living in acidified waters compared to reference sites and remarkable increases in skeletal manganese levels (P. lividus had a 541% increase, A. lixula a 243% increase), presumably due to changes in mineral crystalline structure. Levels of strontium and zinc were also altered. It is not yet known whether such dramatic changes in skeletal chemistry will affect coastal systems but our study reveals a mechanism that may alter inter-species interactions.

Heavy rare earth elements affect early life stages in Paracentrotus lividus and Arbacia lixula sea urchins

2017 ◽  
Vol 154 ◽  
pp. 240-246 ◽  
Author(s):  
Rahime Oral ◽  
Giovanni Pagano ◽  
Antonietta Siciliano ◽  
Maria Gravina ◽  
Anna Palumbo ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Early Life ◽  
Sea Urchins ◽  
Paracentrotus Lividus ◽  
Life Stages ◽  
Early Life Stages ◽  
Heavy Rare Earth ◽  
Heavy Rare Earth Elements ◽  
Arbacia Lixula

scholarly journals Males and females gonad fatty acids of the sea urchins Paracentrotus lividus and Arbacia lixula (Echinodermata)

2009 ◽  
Vol 64 (2) ◽  
pp. 135-142 ◽  
Author(s):  
Inés Martínez-Pita ◽  
Francisco J. García ◽  
María-Luisa Pita
Keyword(s):  
Fatty Acids ◽  
Sea Urchins ◽  
Paracentrotus Lividus ◽  
Males And Females ◽  
Arbacia Lixula
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