The influence of different microalgal diets on European clam (Ruditapes decussatus, Linnaeus, 1758) larvae culture performances

2014 ◽  
Vol 46 (10) ◽  
pp. 2527-2543 ◽  
Author(s):  
Domitília Matias ◽  
Radhouan Ben-Hamadou ◽  
Sandra Joaquim ◽  
Ana Margarete Matias ◽  
Paula Sobral ◽  
...  
Keyword(s):  
Ruditapes Decussatus ◽  
Larvae Culture

Genetic structuring in the grooved carpet shell clam Ruditapes decussatus along the Moroccan coasts revealed by microsatellites

2021 ◽  
pp. 101888
Author(s):  
Zineb Amane ◽  
Lina Tazi ◽  
Yassine Ouagajjou ◽  
Khalil Chahdi Ouazzani ◽  
Ahmed Nabich ◽  
...  
Keyword(s):  
Ruditapes Decussatus ◽  
Genetic Structuring

scholarly journals Larval cryopreservation as new management tool for threatened clam fisheries

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
P. Heres ◽  
J. Troncoso ◽  
E. Paredes
Keyword(s):  
Shell Growth ◽  
Natural Populations ◽  
Ruditapes Philippinarum ◽  
Management Tool ◽  
Equilibration Time ◽  
Ruditapes Decussatus ◽  
Larval Stages ◽  
Long Term Storage ◽  
Declining Species ◽  
Conservation Of Endangered Species

AbstractCryopreservation is the only reliable method for long-term storage of biological material that guarantees genetic stability. This technique can be extremely useful for the conservation of endangered species and restock natural populations for declining species. Many factors have negatively affected the populations of high economical value shellfish in Spain and, as a result, many are declining or threatened nowadays. This study was focused on early-life stages of Venerupis corrugata, Ruditapes decussatus and Ruditapes philippinarum to develop successful protocols to enhance the conservation effort and sustainable shellfishery resources. Firstly, common cryoprotecting agents (CPAs) were tested to select the suitable permeable CPA attending to toxicity. Cryopreservation success using different combinations of CPA solutions, increasing equilibrium times and larval stages was evaluated attending to survival and shell growth at 2 days post-thawing. Older clam development stages were more tolerant to CPA toxicity, being ethylene-glycol (EG) and Propylene-glycol (PG) the least toxic CPAs. CPA solution containing EG yielded the highest post-thawing survival rate and the increase of equilibration time was not beneficial for clam larvae. Cryopreservation of trochophores yielded around 50% survivorship, whereas over 80% of cryopreserved D-larvae were able to recover after thawing.

Effect of TBT on Ruditapes decussatus juveniles

Chemosphere ◽  
2006 ◽  
Vol 63 (9) ◽  
pp. 1499-1505 ◽  
Author(s):  
M.R. Coelho ◽  
W.J. Langston ◽  
M.J. Bebianno
Keyword(s):  
Ruditapes Decussatus

Marine pollution by some heavy metals and physiological response of Ruditapes decussatus

2018 ◽  
Vol 4 (3) ◽  
pp. 199-215
Author(s):  
G. El Khodary ◽  
E. Radwan ◽  
M. Elghazaly ◽  
D. El Bahnasawy
Keyword(s):  
Heavy Metals ◽  
Physiological Response ◽  
Marine Pollution ◽  
Ruditapes Decussatus

Reproductive cycle of the Manila clam (Ruditapes philippinarum): an intensively harvested invasive species in the Tagus Estuary (Portugal)

2017 ◽  
Vol 98 (7) ◽  
pp. 1645-1657 ◽  
Author(s):  
Paula Moura ◽  
Paulo Vasconcelos ◽  
Fábio Pereira ◽  
Paula Chainho ◽  
José Lino Costa ◽  
...  
Keyword(s):  
Invasive Species ◽  
Reproductive Cycle ◽  
Sexual Maturity ◽  
Ruditapes Philippinarum ◽  
Manila Clam ◽  
Tagus Estuary ◽  
Gonad Maturation ◽  
Oocyte Diameter ◽  
Ruditapes Decussatus ◽  
Spawning Period

The present study aimed to describe the reproductive cycle and estimate the size at sexual maturity of the Manila clam (Ruditapes philippinarum) in the Tagus Estuary (Portugal). Specimens were collected monthly from September 2013 to December 2015 during fishing surveys using bivalve dredges. The gametogenic cycle was described in detail using gonad histology and monitored throughout the study period by the monthly variation in the frequency of gonad maturation stages, mean gonadal index and mean oocyte diameter. This invasive population of R. philippinarum displayed synchronous gonadal development between sexes, with ripening occurring mainly in April and May followed by an extensive spawning period until November–December. Individuals reached the size at first sexual maturity at 29.4 mm in shell length (i.e. before 1 year old). Furthermore, the reproductive strategy, dynamics and potential were compared between the invasive R. philippinarum and the native congeneric carpet shell clam (Ruditapes decussatus). Overall, the data gathered in this study constitutes valuable baseline information to propose conservation strategies and implement management measures to minimize the harmful impacts caused by this invasive species on local ecosystems and native biodiversity, particularly over populations of autochthonous bivalves.

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