Quantifying daily migration in the sea urchin Paracentrotus lividus

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.

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

10.20944/preprints202105.0684.v1 ◽

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.

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

Fisheries Research ◽

10.1016/j.fishres.2013.10.010 ◽

2014 ◽

Vol 150 ◽

pp. 60-65 ◽

Cited By ~ 26

Author(s):

Iacopo Bertocci ◽

R. Dominguez ◽

I. Machado ◽

C. Freitas ◽

J. Domínguez Godino ◽

...

Keyword(s):

Sea Urchin ◽

Paracentrotus Lividus ◽

Purple Sea Urchin

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

Aquaculture Nutrition ◽

10.1111/anu.13063 ◽

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

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

Aquatic Toxicology ◽

10.1016/j.aquatox.2015.04.012 ◽

2015 ◽

Vol 163 ◽

pp. 158-166 ◽

Cited By ~ 16

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

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Habitat traits and patterns of abundance of the purple sea urchin, Paracentrotus lividus (Lamarck, 1816), at multiple scales along the north Portuguese coast

Estuarine Coastal and Shelf Science ◽

10.1016/j.ecss.2014.12.048 ◽

2015 ◽

Vol 155 ◽

pp. 47-55 ◽

Cited By ~ 6

Author(s):

Rula Domínguez ◽

Jorge Domínguez Godino ◽

Cristiano Freitas ◽

Inês Machado ◽

Iacopo Bertocci

Keyword(s):

Sea Urchin ◽

Multiple Scales ◽

Paracentrotus Lividus ◽

Portuguese Coast ◽

Purple Sea Urchin ◽

The North

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

Journal of the Marine Biological Association of the United Kingdom ◽

10.1017/s0025315416001521 ◽

2016 ◽

Vol 97 (3) ◽

pp. 561-570 ◽

Cited By ~ 5

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.

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

Journal of the Marine Biological Association of the United Kingdom ◽

10.1017/s002531549900137x ◽

1999 ◽

Vol 79 (6) ◽

pp. 1117-1121 ◽

Cited By ~ 13

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.

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