Results 71 to 80 of about 8,404 (224)

Phylogenetic characterization of two echinoid species of the southeastern Mediterranean, off Egypt

Egyptian Journal of Aquatic Research, 2015
In this study we investigated the phylogenetics of two sea urchin species, Arbacia lixula and Paracentrotus lividus from the Mediterranean Sea. Specimens were collected from the east coast of Alexandria City, Egypt.
Taha Soliman, Hamdy Omar, Fatma A. Abdel Razek, Abdel-Fattah M. El-Sayed, Elzahrae Elmasry, James Davis Reimer   +5 more
doaj   +1 more source

Procedures for high quality RNA extraction from Paracentrotus lividus (LAMARCK, 1816) embryos and gonadal tissue [PDF]

, 2017
The extraction protocol described below is part of the CISAS project, aimed at the realization, within CNR, of an “International Centre of advanced study in environment, ecosystem and human health”.
Bennici, C., Biondo, G., Cuttitta, Angela, Di Natale, Marilena Vita, Masullo, T., Monastero, Calogera, Nicosia, A., Patti, Carlo, Tagliavia, Marcello   +8 more
core  

Hotspots of predation persist outside marine reserves in the historically fished Mediterranean Sea [PDF]

, 2015
8 páginas, 4 figuras, 2 tablas.The Mediterranean Sea has sustained historically high levels of fishing since pre-Roman times. This onceabundant sea has witnessed major declines in apex predators, now largely restricted to isolated pockets within marine
Arthur, Rohan, Boada, Jordi, Farina, Simone, Mascaró, Oriol, Santana, Yaiza   +4 more
core   +2 more sources

Unravelling echinoid mass mortalities: a global overview of mechanisms, spatio‐temporal trends, and taxonomic insights

Biological Reviews, Volume 101, Issue 1, Page 221-236, February 2026.
ABSTRACT Mass mortality events (MMEs) have been occurring since the dawn of time. However, in contrast to terrestrial events, most marine MMEs remain undetected, largely due to the inaccessibility of many marine environments. One of the most notorious and best‐studied marine MMEs in modern times is that of the population collapse of the echinoid ...
Lisa‐Maria Schmidt, Guillermo Anderson Benaim, Omri Bronstein   +2 more
wiley   +1 more source

Effects of Glyphosate-Based and Derived Products on Sea Urchin Larval Development

Journal of Marine Science and Engineering, 2020
Despite the widespread use of herbicide glyphosate in cultivation, its extensive runoff into rivers and to coastal areas, and the persistence of this chemical and its main degradation product (aminomethylphosphonic acid, AMPA) in the environment, there ...
Davide Asnicar, Costanza Cappelli, Ahmad Safuan Sallehuddin, Nur Atiqah Maznan, Maria Gabriella Marin   +4 more
doaj   +1 more source

Morphometric relationships and annual gonad index of the edible Sea urchin Paracentrotus lividus from North Western Sardinia = Relazioni morfometriche e indice gonadico annuale del riccio di mare commestibile Paracentrotus lividus nel nord ovest Sardegna [PDF]

, 2006
Weight/diameter, weight/height and height/diameter morphometric relationships were calculated for a shallow rocky Paracentrotus lividus population sampled monthly near Alghero (Italy) from November 2004 to October 2005.
Chessa, Lorenzo Antonio, Manunza, Bruno Mario Luigi, Meloni, Gianni, Pais, Antonio, Ruiu, Alberto, Serra, S.   +5 more
core  

Sperm motility and fertilisation success in an acidified and hypoxic environment [PDF]

, 2016
The distribution and function of many marine species is largely determined by the effect of abiotic drivers on their reproduction and early development, including those drivers associated with elevated CO2 and global climate change.
Anthony S. Clare, Bencic, Bencic, Billard, Brewer, Byrne, Byrne, Byrne, Byrne, Caldeira, Caldwell, Chan, Cheung, Christen, Collard, Cooper, Crimaldi, Darszon, Diaz, Diaz, Diaz, Dupont, Ericson, Findlay, Findlay, Fitzpatrick, Frieder, Frommel, Gary S. Caldwell, Gobler, Gonzalex-Bernat, Havenhand, Havenhand, Helen Graham, Helen S. Findlay, Herreid, Hofmann, IPCC, Johnson, Kroeker, Kurihara, Levitan, Marcus, Martin, Matthew G. Bentley, McAllen, Middelburg, Morita, Moulin, Neill, Oschlies, Pörtner, Pörtner, Pörtner, Queirós, Reum, Reuter, Riveros, Samuel P. S. Rastrick, Schlegel, Sedlaceck, Shin, Siikavuopio, Spicer, Stephen Widdicombe, Vaquer-Sunyer, Wang, Wu, Yasumasu   +68 more
core   +1 more source

Characteristics of the Utilization of Nucleosides by Embryos of Paracentrotus lividus

Journal of Biological Chemistry, 1962
Embryos-Gametes were obtained from the gonads of sea urchins (P. lividus) collected from the area of the bay of Naples from March to July. The eggs were suspended and washed in filtered sea water. Fertilization was performed by stirring with a small amount of sperm on a glass rod at 20-22”. Fertilized eggs were allowed to develop at 18” in filtered sea
openaire   +2 more sources

Pigment‐Macromolecule Complexes Isolation from Sea Urchin Biomineral Waste for Coloring Materials

Chemistry–Methods, Volume 6, Issue 1, January 2026.
A methodology has been developed to extract the colored organic fraction occluded within seashell biomineral waste. Applied to sea urchin skeletons, free polyhydroxylated naphthoquinone (PHNQ) pigments and PHNQ‐macromolecule complexes are isolated. These complexes show superior pH stability in purple hues compared to free PHNQ, which shifts from red to
Claudio Ferreira, Vaskar Sardhalia, Alshaba Kakar, Romain Descamps, Lucrèce Matheron, François Ribot, Alexandre Disser, Tony Jouanneau, Elena Vasileva, Natalia Mishchenko, Nadine Nassif, Frédéric Marin, Marie Albéric   +12 more
wiley   +1 more source

Specification of cell fate in the sea urchin embryo: summary and some proposed mechanisms [PDF]

, 1998
An early set of blastomere specifications occurs during cleavage in the sea urchin embryo, the result of both conditional and autonomous processes, as proposed in the model for this embryo set forth in 1989.
Cameron, R. Andrew, Davidson, Eric H., Ransick, Andrew   +2 more
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