Annual reproductive cycle and sexuality of the oyster Crassostrea madrasensis (Preston)

Joseph, M Mohan; Madhyastha, M. N.

doi:10.1016/0044-8486(84)90189-3

Cited by 14 publications

(5 citation statements)

References 6 publications

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“…Crassostrea spp. reach sexual maturity at a shell length ≥ 30 mm (based on the sexual maturation rate of C. bilineata , Mohan Joseph & Madhyastha 1984; and other Crassostrea species, Harding & Mann 2000; Menzel & Nascimento 1991). The current population demographics of Crassostrea spp.…”

Section: Resultsmentioning

confidence: 99%

Restoration potential of Asian oysters on heavily developed coastlines

Lau

Thomas²,

Hancock

et al. 2020

Restoration Ecology

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Reef-building oysters historically provided the main structural and ecological component of temperate and subtropical coastal waters globally. While the loss of oyster reefs is documented in most regions globally, assessments of the status of Asian oyster reefs are limited. The feasibility of restoration within the regional biological and societal contexts needs to be assessed before implementation. Here, we quantified the current distribution of natural oyster reefs (Crassostrea spp.) in the shallow coastal waters of Hong Kong, assessed the biological feasibility of reestablishing reefs using natural recruitment, and examined their current and potential water filtration capacity as a key ecosystem service provided by restoration. We found natural low-relief oyster beds in the low intertidal coastal areas at a subset of the locations surveyed. These areas are, however, degraded and have sparse densities of oysters generally <2 years old. Recruitment was high in some areas (>500,000 indiv./m 2) and while survival to maturity varied across sites there was adequate larval supply and survival for restoration. Filtration rates for a 1-year-old recruit (90 mm length, approximately 30 L/hour per individual) at summer temperatures (30 C) meant that even the small remnant populations are able to provide some filtration services (up to 31.7 ML/hour). High natural recruitment means that oyster reef restoration can be achieved with the addition of hard substrate for recruitment, increased protection of restoration sites, and would not only increase the ecological value of reefs regionally but also serve as a model for future restoration in Asia.

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Section: Resultsmentioning

confidence: 99%

Restoration potential of Asian oysters on heavily developed coastlines

Lau

Thomas²,

Hancock

et al. 2020

Restoration Ecology

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“…The shell length of M. bilineata samples analyzed in the current study that were considered sufficient for studying gonadal histology ranged from 41.00 mm to 124.94 mm. The shell length at first maturity for the species were reported as > 12 mm in males and >24 mm in females [ 27 ].…”

Section: Discussionmentioning

confidence: 99%

“…The percentages of males, females, hermaphrodites, and indeterminates were 50.9%, 42.5%, 1.3%, and 5.3%, respectively, in Ostrea madrasensis from Ennur Backwater, Madras, India [ 36 ]. M. bilineata is an alternate hermaphrodite on the east coast of India and is dioecious on the west coast of India [ 27 ]. It has been suggested that the M. bilineata population could be unisexual in a favorable environment to support rapid growth and reproduction, and hermaphroditism is an exception that could occur when the animals are exposed to environmental stress.…”

Section: Discussionmentioning

confidence: 99%

“…The spawning periods of M. bilineata reported from different locations are listed in Table 4 . Studies in the literature have suggested a single prolonged spawning season [ 1 , 26 , 27 ] or two separate spawning seasons [ 24 , 25 , 40 ] of this species in various locations. A prolonged spawning season of this species was reported from January to November in a study on the northwest coast of India, with two peaks, in March to April and September to October [ 26 ].…”

Section: Discussionmentioning

confidence: 99%

“…A prolonged spawning season of this species was reported from January to November in a study on the northwest coast of India, with two peaks, in March to April and September to October [ 26 ]. However, the spawning activity of M. bilineata principally occurred from December to May, with two peaks from December to January, and April to May, in a study from Mulki Estuary, India [ 27 ]. In contrast, the spawning period of this species was noticed from April to November in another study in Mulki Estuary, India [ 24 ].…”

Section: Discussionmentioning

confidence: 99%

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Annual gametogenic phenology of oyster, Magallana bilineata (Röding, 1798) collected from the west coast of Moheshkhali Island, Cox's Bazar, Bangladesh

Uddin,

Rahman,

Sonia

et al. 2024

Heliyon

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Relative importance of family, site, and field placement timing on survival, growth, and yield of hatchery-produced Pacific oyster spat (Crassostrea gigas)

et al. 2005

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Summer mortality has been reported in the Pacific oyster, Crassostrea gigas, for many years in different parts of the world. The causes of this phenomenon are complex. The multidisciplinary program "MOREST", coordinated by IFREMER, was initiated to understand the causes of summer mortality of Crassostrea gigas juveniles in France and to reduce its impact on oyster production. Within this program, three successive groups of bi-parental families were bred in a hatchery in 2001 and placed in the field during summer in three sites (Ronce, Rivière d'Auray, and Baie des Veys). This paper reports the relative importance of family, site and field placement timing for three characters of major importance for oyster production: survival, growth, and yield. At the end of the summer period, significant differences for the three characters were observed among sites and families for each group. Family effect was the largest variance component for survival, representing 46% of the total. Variance component analysis revealed that variation in yield among families depended either on survival or on growth according to the site. Significant family × environment interactions were observed for yield and survival but not for growth. No difference in survival was found among groups in the three sites at the end of the experiment, but a critical period of mortality was identified from late July until early September. The influence of environmental conditions, notably on reproductive allocation and its relationship with the studied traits, is discussed.

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Annual reproductive cycle and sexuality of the oyster Crassostrea madrasensis (Preston)

Cited by 14 publications

References 6 publications

Restoration potential of Asian oysters on heavily developed coastlines

Restoration potential of Asian oysters on heavily developed coastlines

Annual gametogenic phenology of oyster, Magallana bilineata (Röding, 1798) collected from the west coast of Moheshkhali Island, Cox's Bazar, Bangladesh

Relative importance of family, site, and field placement timing on survival, growth, and yield of hatchery-produced Pacific oyster spat (Crassostrea gigas)

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