The use of diatom Skeletonema costatum on aquaculture‐produced purple sea urchin ( Paracentrotus lividus ) larvae and post‐larvae diet

2020 ◽  
Vol 51 (6) ◽  
pp. 2545-2554
Author(s):  
João Araújo ◽  
Ana Candeias‐Mendes ◽  
Ivo Monteiro ◽  
Diogo Teixeira ◽  
Florbela Soares ◽  
...  
Keyword(s):  
Sea Urchin ◽  
Skeletonema Costatum ◽  
Paracentrotus Lividus ◽  
Purple Sea Urchin ◽  
Diatom Skeletonema Costatum

scholarly journals Diverse Transformers (Trf) Protein Family in the Sea Urchin Paracentrotus lividus Act through Collaboration between Cellular and Humoral Immune Effector Arms

2021 ◽  
Author(s):  
Iryna Yakovenko ◽  
Asaf Donnyo ◽  
Or Ioscovich ◽  
Benyamin Rosental ◽  
Matan Oren
Keyword(s):  
Sea Urchin ◽  
Sea Urchins ◽  
Paracentrotus Lividus ◽  
Protein Family ◽  
Immune Gene ◽  
Immune Effector ◽  
E Coli ◽  
Purple Sea Urchin ◽  
Humoral Immune ◽  
Extended Families

Sea urchins are long-living invertebrates with a complex immune system which includes extended families of immune receptors. A central immune gene family in the sea urchins encodes for the Transformer (Trf) proteins. The Trf family was so far studied mainly in the purple sea urchin Strongylocentrotus purpuratus. In this study, we explored this protein family in the Mediterranean Sea urchin Paracentrotus lividus. The PlTrf genes and predicted proteins were found to be highly diverse and showed a typical Trf size range and structure. We found that P. lividus coelomocytes and hemolymph contain different PlTrf protein repertoires with a shared subset which specifically bind E. coli bacteria. Using FACS, we identified five different P. lividus coelomocyte sub-populations with cell surface Trf protein expression. The relative abundance of the Trf-positive cells sharply increased following immune challenge with E. coli bacteria, but not following challenge with LPS or sea urchin pathogen V. penaeicida. Finally, we demonstrated that the phagocytosis of E. coli bacteria by P. lividus phagocytes is mediated through the hemolymph and is inhibited by blocking Trf activity with anti-Trf antibodies. Together, our results suggest collaboration between cellular and humoral Trf-mediated effector arms in the P. lividus specific immune response to pathogens.

Multiple effects of harvesting on populations of the purple sea urchin paracentrotus lividus in north Portugal

2014 ◽  
Vol 150 ◽  
pp. 60-65 ◽  
Author(s):  
Iacopo Bertocci ◽  
R. Dominguez ◽  
I. Machado ◽  
C. Freitas ◽  
J. Domínguez Godino ◽  
...  
Keyword(s):  
Sea Urchin ◽  
Paracentrotus Lividus ◽  
Purple Sea Urchin

Formulation of a new sustainable feed from food industry discards for rearing the purple sea urchin Paracentrotus lividus

2020 ◽  
Vol 26 (4) ◽  
pp. 1046-1057
Author(s):  
Laura Ciriminna ◽  
Geraldina Signa ◽  
Antonino Maurizio Vaccaro ◽  
Concetta Maria Messina ◽  
Antonio Mazzola ◽  
...  
Keyword(s):  
Sea Urchin ◽  
Food Industry ◽  
Paracentrotus Lividus ◽  
Purple Sea Urchin

Quantifying daily migration in the sea urchin Paracentrotus lividus

2000 ◽  
Vol 80 (1) ◽  
pp. 177-178 ◽  
Author(s):  
Anne C. Crook ◽  
Maria Long ◽  
David K.A. Barnes
Keyword(s):  
Sea Urchin ◽  
Paracentrotus Lividus ◽  
Subtidal Zone ◽  
Circadian Pattern ◽  
Age Classes ◽  
Quantitative Evidence ◽  
Purple Sea Urchin ◽  
Size Groups ◽  
Shallow Subtidal ◽  
Lough Hyne

In Ireland the purple sea urchin Paracentrotus lividus (Echinoidea) typically inhabits intertidal bored holes. At Lough Hyne, Co. Cork, a population occurs associated with rock scree in the shallow subtidal zone. This study provides unequivocal quantitative evidence to demonstrate diurnal migration in a population of P. lividus at Lough Hyne, Ireland. Most size groups/age-classes did not to migrate, the youngest always and oldest never occurring under rocks. Those that did migrate between the lower and upper surface of rocks (2+, 3+ and 4+ age categories) did so in exactly the reverse circadian pattern to those described from the Mediterranean Sea.

Sperm exposure to carbon-based nanomaterials causes abnormalities in early development of purple sea urchin (Paracentrotus lividus)

2015 ◽  
Vol 163 ◽  
pp. 158-166 ◽  
Author(s):  
Tina Mesarič ◽  
Kristina Sepčić ◽  
Damjana Drobne ◽  
Darko Makovec ◽  
Marco Faimali ◽  
...  
Keyword(s):  
Early Development ◽  
Sea Urchin ◽  
Paracentrotus Lividus ◽  
Purple Sea Urchin ◽  
Carbon Based Nanomaterials ◽  
Carbon Based

A first approach to stock assessment of the sea urchin Paracentrotus lividus (Lamarck, 1816) in Cantabria (Bay of Biscay)

2016 ◽  
Vol 97 (3) ◽  
pp. 561-570 ◽  
Author(s):  
Xabier Guinda ◽  
Gorka Bidegain ◽  
Araceli Puente ◽  
José Antonio Juanes
Keyword(s):  
Sea Urchin ◽  
Stock Assessment ◽  
Management Strategies ◽  
Paracentrotus Lividus ◽  
Bay Of Biscay ◽  
Sustainable Harvesting ◽  
Purple Sea Urchin ◽  
Density Values ◽  
Precautionary Measures ◽  
Depth Ranges

The purple sea urchin P. lividus is a marine resource greatly valued for its highly nutritious roe. The objective of this work is to analyse the spatial distribution pattern and population structure of this species in the region of Cantabria (Bay of Biscay) in order to identify the most appropriate zones for sustainable harvesting and for the establishment of adequate management strategies. Two depth ranges were studied (<5 and 5–10 m) in five coastal areas. The available stock of commercial individuals (size >55 mm) was estimated based on the density of individuals and biometric parameters. Significant differences were found among areas but not among depth ranges. Three areas showed low densities with large individuals, whereas two areas showed high densities with small individuals. Despite the average smaller size of the individuals, these high-density areas accumulated 76% of the commercial stock, making these the most suitable zones for the sustainable harvesting of P. lividus in the region. The high variability of the observed density values resulted in elevated uncertainty in the estimation of stocks. However, the high sea urchin densities together with the high percentages of commercial individuals suggest that the resource is currently underexploited. Further studies should be carried out, and precautionary measures should be adopted before opening the fishery. The suitability of many of these measures is discussed in the present work, as a necessary step in the management of the P. lividus fishery in Cantabria.

Comparative study of the covering reaction of the purple sea urchin, Paracentrotus lividus, under laboratory and field conditions

1999 ◽  
Vol 79 (6) ◽  
pp. 1117-1121 ◽  
Author(s):  
Anne C. Crook ◽  
Emma Verling ◽  
David K.A. Barnes
Keyword(s):  
Comparative Study ◽  
Sea Urchin ◽  
Age Groups ◽  
Paracentrotus Lividus ◽  
Field Conditions ◽  
Population Differences ◽  
Purple Sea Urchin ◽  
Covering Material

Abiotic and biotic aspects of the covering behaviour of the purple sea urchin, Paracentrotus lividus (Echinodermata: Echinoidea) were systematically examined in situ and in the laboratory to analyse potential intra-population differences in the nature of this behaviour. In the field, significant differences in the occurrence of covering behaviour were found between age groups. Smaller P. lividus covered at higher frequencies than larger individuals. Higher proportions of individuals were also observed to cover during afternoon sampling periods. Significant differences in the types of covering material used were found between P. lividus observed in the laboratory and in the field. These findings suggest that the benefits and/or opportunities of covering behaviour may change with size and habitat.

scholarly journals Spatio-temporal patterns based on demographic and genetic diversity of the purple sea urchin Paracentrotus lividus in the area around Corsica (Mediterranean Sea)

2018 ◽  
Vol 19 (3) ◽  
pp. 620 ◽  
Author(s):  
SOPHIE DUCHAUD ◽  
ERIC D.H. DURIEUX ◽  
STEPHANE COUPE ◽  
VANINA PASQUALINI ◽  
SONIA TERNENGO
Keyword(s):  
Genetic Diversity ◽  
Sea Urchin ◽  
Sea Urchins ◽  
Paracentrotus Lividus ◽  
Population Densities ◽  
Genetic Structuring ◽  
High Genetic Diversity ◽  
Size Classes ◽  
Purple Sea Urchin ◽  
Spatio Temporal

Sea urchins were harvested for decades in many areas throughout its distribution range, potentially leading to population collapse. In France, the purple sea urchin Paracentrotus lividus is intensively harvested. Yet, the demography and population dynamics remained under-documented, particularly in Corsica. In this context, we have characterized the fluctuations in density of several size classes at 8 sites around the island, and assessed the genetic diversity and structuring of the population. Densities recorded lie between 0 and 2.18 (± 0.41) individuals.m-2 and spatio-temporal variabilities have also been highlighted. The study of the influence of vegetation cover on the size classes suggests that small- and medium- sized individuals prefer substrates of intermediate heights, whereas individuals with a diameter ≥ 5 cm are more often observed on encrusting substrates, and may be responsible for the continuation of this type of benthic community. The genetic study indicates a high genetic diversity with a low genetic structuring. The Ne values obtained are similar to those described in previous papers. Due to estimates of local contemporary Ne and the homogeneous genetic diversity, our data tend to show that the Corsican population of P. lividus is not overexploited.

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