The reproductive biology of the baby clam, Marcia opima, from two geographically separated areas of India

Suja, N.; Muthiah, P

doi:10.1016/j.aquaculture.2007.07.234

Cited by 13 publications

(6 citation statements)

References 18 publications

(20 reference statements)

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“…In C. farreri, the reproductive cycle is characterized by two phases: a short resting phase from November to December and gametogenesis during the rest of the year. Although the division of gonadal development is different in bivalves, the bases of these determinations are characteristics of gametogenesis and variations of oocyte diameters (Lango-Reynoso et al 2000;Darriba et al 2004;Drummond et al 2006;Li et al 2006;Suja and Muthiah 2007;Herrmann et al 2009). According to Liao et al (1983), the development of gonads in C. farreri were grouped into four stages (proliferative stage: JanuaryFebruary; growing stage: March-April; mature stage: May-July; resting stage: November-December) based on histological structure.…”

Section: Gametogenesismentioning

confidence: 99%

Variations of estradiol-17β and testosterone levels correlated with gametogenesis in the gonad of Zhikong scallop (Chlamys farreri) during annual reproductive cycle

et al. 2014

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To assess the potential roles of sex steroids in modulating reproductive processes in the Zhikong scallop (Chlamys farreri (Jones and Preston, 1904)), variations in estradiol-17␤ (E2) and testosterone (T) levels in gonads were examined monthly from January to December 2012 by enzyme-linked immunosorbent assay (ELISA). The mean concentrations of E2 and T in gonads ranged from 75.07 to 666.24 pg/g and from 91.09 to 506.28 pg/g, respectively. Concentrations of E2 were significantly higher in ovaries than in testes, while T concentrations were higher in testes than in ovaries during gametogenesis. Concentrations of E2 in females and T in males increased with development and maturation of gonad, attained the highest value before spawning, and decreased rapidly after spawning. A positive correlation between E2 levels and oocyte diameters (r = 0.743, P < 0.05, n = 25) was observed, suggesting that E2 may play a role in oogenesis. These findings indicate that E2 and T, which are highly correlated with the reproductive cycle, may play an important role in sex determination, sex differentiation, gametogenesis, and spawning in C. farreri.Résumé : Afin d'évaluer les rôles possibles des stéroïdes sexuels dans la modulation des processus de reproduction chez le pétoncle farreri (Chlamys farreri (Jones et Preston, 1904)), les variations des concentrations d'estradiol-17␤ (E2) et de testostérone (T) dans les gonades ont été examinées mensuellement de janvier à décembre 2012 par l'analyse immunoenzymatique ELISA. Les concentrations moyennes d'E2 et de T dans les gonades allaient de 75,07 à 666,24 pg/g et de 91,09 à 506,28 pg/g, respectivement.Les concentrations d'E2 étaient significativement plus élevées dans les ovaires que dans les testicules, alors que les concentrations de T étaient plus élevées dans les testicules que dans les ovaires durant la gamétogénèse. Les concentrations d'E2 chez les femelles et de T chez les mâles augmentaient au fil du développement et de la maturation des gonades, atteignaient leurs maximums avant le frai et diminuaient rapidement par la suite. Une corrélation positive observée entre les concentrations d'E2 et le diamètre des oocytes (r = 0,743, P < 0,05, n = 25) donne à penser que l'E2 pourrait jouer un rôle dans l'ovogénèse. Ces résultats indiquent que l'E2 et la T, qui sont fortement corrélés au cycle de reproduction, pourraient jouer un rôle important dans la détermination du sexe, la différenciation sexuelle, la gamétogénèse et le frai chez C. farreri. [Traduit par la Rédaction]

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Section: Gametogenesismentioning

confidence: 99%

Variations of estradiol-17β and testosterone levels correlated with gametogenesis in the gonad of Zhikong scallop (Chlamys farreri) during annual reproductive cycle

et al. 2014

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“…While on the other hand, female gonad showed significant alterations like decline of stroma and follicular rupture with further, arresting of oogonia, complete autolysis in oocytes and such alterations were observed particularly at low and high salinities and temperature ranges. A study by Suja and Muthiah [18] has observed significant effects of different temperatures on oocyte diameter. The observations revealed comparatively more decreased in oocyte diameter at 23 °C range than 28 °C.…”

Section: Discussionmentioning

confidence: 99%

Effect of salinity and temperature on broodstock conditioning of mangrove clam Polymesoda erosa (Solander, 1786)

Vr¹,

As²,

R³

et al. 2021

Int. J. Fish. Aquat. Stud.

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Culture of molluscan is clearly limited by the availability of seed, as this production proceeds almost exclusively from natural recruitment. Artificial spawning and larval rearing programs could provide an alternative source of spat. This study was designed to evaluate the effect of different conditioning temperature and salinity on the broodstock maturation and Condition Factor of mangrove clam (P. erosa) collected from different locations of Ratnagiri coast. Batches of clams from different sites were collected in February, and conditioned at temperature 26 °C, 28 °C, 30 °C and 32 °C. For conditioning at different salinity, it was kept at 10,15,20,25,30 and 35 psu, The results showed that the oocyte maturation was faster at salinity 35 psu and the best conditioning temperature was 32 °C. The Condition Factor (CF) was higher at 32 °C temperature and at 30 psu salinity, whereas, no significant difference was observed in CF at 30 and 35 psu. These results suggest that the efficient conditioning temperature and salinity is related to the natural spawning season.

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“…In eastern Atlantic waters, the majority of spawning periods has been recorded in the summer months, May and June [ 16 ]. On the coast of India, the spawning season of Marcia optima has been recorded from May to July in the south-east, while in the south-west, it is from March to May [ 29 ].…”

Section: Discussionmentioning

confidence: 99%

Distribution and density of Lutraria rhynchaena Jonas, 1844 relate to sediment while reproduction shows multiple peaks per year in Cat Ba-Ha Long Bay, Vietnam

Hao

Tuyet

et al. 2020

Open Life Sciences

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Lutraria rhynchaena Jonas, 1844 is of great commercial interest, but its reserves have dramatically declined over recent decades. Therefore, there is an urgent need of scientific basis to propose effective fishery management measures and improve artificial aquaculture of the clam. In this study, we investigated the distribution and density of L. rhynchaena, sediment characteristics, and established the clam’s reproductive cycle through monthly observations from August 2017 to July 2018. The study results showed that distribution and density of clams are related to sediment types, and the sediment type of medium sand is likely the best benthic substrate for the clams. The spawning of clams occurred throughout the year with three spawning peaks in January, April and September. For the sustainable management of the clam resource in Cat Ba-Ha Long Bay, the fishery authorities can issue a ban on harvest of the clam in spawning peak months in January, April and September.

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The reproductive biology of the baby clam, Marcia opima, from two geographically separated areas of India

Cited by 13 publications

References 18 publications

Variations of estradiol-17β and testosterone levels correlated with gametogenesis in the gonad of Zhikong scallop (Chlamys farreri) during annual reproductive cycle

Variations of estradiol-17β and testosterone levels correlated with gametogenesis in the gonad of Zhikong scallop (Chlamys farreri) during annual reproductive cycle

Effect of salinity and temperature on broodstock conditioning of mangrove clam Polymesoda erosa (Solander, 1786)

Distribution and density of Lutraria rhynchaena Jonas, 1844 relate to sediment while reproduction shows multiple peaks per year in Cat Ba-Ha Long Bay, Vietnam

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