Age determination in the sea urchin paracentrotus lividus (Lamarck), with notes on the reproductive cycle

1975 ◽  
Vol 20 (2) ◽  
pp. 157-178 ◽  
Author(s):  
G.B. Crapp ◽  
M.E. Willis
Keyword(s):  
Sea Urchin ◽  
Reproductive Cycle ◽  
Age Determination ◽  
Paracentrotus Lividus

Reproductive cycle of the sea urchin Paracentrotus lividus in the Cantabrian Sea (northern Spain): environmental effects

2009 ◽  
Vol 90 (4) ◽  
pp. 699-709 ◽  
Author(s):  
J.M. González-Irusta ◽  
F. Goñi de Cerio ◽  
J.C. Canteras
Keyword(s):  
Sea Urchin ◽  
Reproductive Cycle ◽  
Phytoplankton Bloom ◽  
Chlorophyll Concentration ◽  
Gonad Index ◽  
Paracentrotus Lividus ◽  
Northern Spain ◽  
Spring Phytoplankton Bloom ◽  
In The Beginning ◽  
Spawning Periods

The main objective of this study was to describe the reproductive cycle of the sea urchin Paracentrotus lividus on the Cantabrian coast (north of Spain), and assess its relationship with environmental factors. To achieve this, samples were taken monthly from three localities during 17 months in two different habitats. At least 15 individuals from each location and habitat were collected during each sampling occasion and used for assessments of gonad index and histological sections. The water temperature and the chlorophyll concentration were also measured. The breeding season of P. lividus in Cantabria started in March and continued until September with one or two main spawning periods per year (depending on year and population), the first one in the beginning of spring and the second one in the summer. The most important differences in the gonad cycle were observed among localities, and the smallest among habitats. Temperature, photoperiod and nutritive stage are important factors controlling the gonad cycle. The beginning of spawning in the Cantabrian populations coincides with the spring phytoplankton bloom and the rise in temperature, which may act as environmental triggers.

Reproductive cycle of the commercially harvested sea urchin ( Paracentrotus lividus ) along the western coast of Portugal

2019 ◽  
Vol 138 (1) ◽  
pp. 40-54 ◽  
Author(s):  
Inês Machado ◽  
Paula Moura ◽  
Fábio Pereira ◽  
Paulo Vasconcelos ◽  
Miguel B. Gaspar
Keyword(s):  
Sea Urchin ◽  
Reproductive Cycle ◽  
Paracentrotus Lividus ◽  
Western Coast

scholarly journals Reproductive Cycle of the Edible Sea Urchin Paracentrotus lividus (Echinodermata: Echinoidae) in the Aegean Sea

Water ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 1029 ◽  
Author(s):  
Dimitris Vafidis ◽  
Chryssanthi Antoniadou ◽  
Kyratso Kyriakouli
Keyword(s):  
Reproductive Biology ◽  
Sea Urchin ◽  
Reproductive Cycle ◽  
Sea Urchins ◽  
Reproductive Potential ◽  
Aegean Sea ◽  
Paracentrotus Lividus ◽  
Mediterranean Populations ◽  
Spawning Period ◽  
Gonad Somatic Index

The sustainable management of fisheries resources requires extensive knowledge of their reproductive biology, which is scarcely the case for marine invertebrates. Sea urchins are among the most intensively harvested invertebrates, since their gonads, or “roe”, constitute a highly appreciated gastronomic delicacy, causing a severe decline in natural populations worldwide. In the Mediterranean, the typical commercial echinoid species is Paracentrotus lividus; its biology, however, has not been adequately studied in the Aegean Sea. Within this context, the present study examined the reproductive biology of the edible sea urchin, P. lividus, in the Aegean Sea (Pagasitikos Gulf) over a two-year period. Adult specimens were randomly collected by SCUBA diving (3–5 m) at monthly intervals to determine the gonad-somatic index, fecundity, and gametogenesis through the morphological and histological examination of the gonads. An annual reproductive cycle was defined in both years with a clear spawning peak in early spring, conforming to previous reports from other Mediterranean populations. A discrete secondary spawning period was also detected in early winter, as the species undergoes a second gametogenic event. These results are indicative for the increased reproductive potential of P. lividus in its south distributional range, suggesting a relevant revision of the official fishing season of the species.

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

2020 ◽  
Vol 8 (9) ◽  
pp. 661
Author(s):  
Davide Asnicar ◽  
Costanza Cappelli ◽  
Ahmad Safuan Sallehuddin ◽  
Nur Atiqah Maznan ◽  
Maria Gabriella Marin
Keyword(s):  
Larval Development ◽  
Sea Urchin ◽  
Marine Invertebrates ◽  
Parent Compound ◽  
Paracentrotus Lividus ◽  
Marine Species ◽  
Negative Effects ◽  
Aminomethylphosphonic Acid ◽  
Main Degradation Product ◽  
Herbicide Glyphosate

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 is still little information on the potential negative effects of glyphosate, its commercial formulation Roundup® and AMPA on marine species. This study was conducted with the aim of providing a comparative evaluation of the effects of glyphosate-based and its derived chemicals on the larval development of the sea urchin Paracentrotus lividus, thus providing new data to describe the potential ecotoxicity of these contaminants. In particular, the effects on larval development, growth and metabolism were assessed during 48 h of exposure from the time of egg fertilization. The results confirm that AMPA and its parent compound, glyphosate have similar toxicity, as observed in other marine invertebrates. However, interestingly, the Roundup® formulation seemed to be less toxic than the glyphosate alone.

scholarly journals Biometric characteristics of the wild population of sea urchin Paracentrotus lividus (Lamarck, 1816) on the Tunisian coast

2021 ◽  
Author(s):  
F. Sellem ◽  
B. Bouhaouala-Zahar
Keyword(s):  
Sea Urchin ◽  
Wild Population ◽  
Multivariable Analysis ◽  
Paracentrotus Lividus ◽  
Biometric Data ◽  
Relative Growth ◽  
Tunisian Coast ◽  
Population Discrimination ◽  
Positive Growth ◽  
Negative Growth

AbstractThe present study was conducted to provide biometric data of the edible sea urchin Paracentrotus lividus along the Tunisian coastline where thirteen marine localities were selected randomly. A total of 653 individuals were collected and their metric and weight measurements were recorded. The size distribution of the different samples was determined and relative growth expressions were deduced. Data analysis showed that all localities’ samples of the wild population were dominated by one-size class, except Port Prince and Haouaria. Interestingly, only diameter-height relationships (D-H) were different between the geographical localities. Diameter-weight relationships (D-TW and D-TWTE) revealed a significant negative growth for all the localities, with the exception of Gammarth which showed positive growth for total weight (D-TW). Moreover, the multivariable analysis revealed divergences and/or similarities between metric and weight variables. Altogether, data highlights the inter-population discrimination with respect to geographic localization and clear segregation between the northern and the eastern localities demonstrated the plasticity of the species.

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