Effects of salinity on pre- and post-fertilization developmental events in the mangrove oyster Crassostrea rhizophorae (GUILDING, 1828).

Autor: Lopes RGPS; Department of Fisheries and Aquaculture, Federal Rural University of Pernambuco, Recife, PE, Brazil; Department of Fisheries Engineering, Maranhao State University, São Luís, MA, Brazil., Rego AP; Department of Fisheries Engineering, Maranhao State University, São Luís, MA, Brazil., Gomes SMJ; Department of Fisheries Engineering, Maranhao State University, São Luís, MA, Brazil., Antonio ÍG; Department of Fisheries Engineering, Maranhao State University, São Luís, MA, Brazil., Freire TB; Laboratory of Marine Mollusks, Department of Aquaculture, Federal University of Santa Catarina, Florianópolis, Brazil., Coimbra MRM; Department of Fisheries and Aquaculture, Federal Rural University of Pernambuco, Recife, PE, Brazil. Electronic address: maria.rmcoimbra2@ufrpe.br.
Jazyk: angličtina
Zdroj: Theriogenology [Theriogenology] 2024 Apr 01; Vol. 218, pp. 62-68. Date of Electronic Publication: 2024 Jan 26.
DOI: 10.1016/j.theriogenology.2024.01.033
Abstrakt: The mangrove oyster Crassostrea rhizophorae is identified as a potentially valuable species for tropical aquaculture, however, information on the physiological mechanisms of reproduction under laboratory conditions for this species is limited. This study investigated the effects of salinity at different concentrations (15, 20, 25, 30, 35, and 40 g/L) on the induction of germinal vesicle breakdown (GVBD) of oocytes obtained through stripping, the release of polar bodies (PB1 and PB2), and the larval development of the mangrove oyster. The results revealed a relationship between salinity and the percentage of GVBD, with the most effective range being 30-40 g/L within the hydration time frame between 70 and 120 min. The release of 50 % of PB1 was detected within this salinity range, while for the release of 50 % of PB2, the saline treatments of 35 and 40 g/L showed the best results. Overall, the salinity range of 30-40 g/L is suggested as the most suitable of polyploidy induction methodologies through the retention of PB1 or PB2. Regarding larval hatching, while salinities between 25 and 40 g/L presented similar percentages, at 15 g/L no hatching was observed. This study demonstrated that salinity is a key factor in early pre- and post-fertilization stages for the successful reproduction of mangrove oyster in hatcheries and that the percentages of oocyte maturation and artificial fertilization can be optimized by adjusting salinity.
Competing Interests: Declaration of competing interest The authors declare no conflict of interest.
(Copyright © 2024 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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