Reproductive cycle of the pearl oyster, Pinctada radiata (Mollusca: Pteridae), in the Zarat site (Gulf of Gabès, Tunisia)

Lassoued, Marwa; Damak, Wafa; Hamza-Chaffai, Amel

doi:10.1007/s41207-018-0056-y

Cited by 11 publications

(2 citation statements)

References 15 publications

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“…The size of the sampled individuals, as well as previous studies indicate perennial survival and adaptation of a relatively numerous population P. radiata is a protandrous hermaphrodite, and the fi rst sexual maturity occurs at a size of 17 mm [16]. Since P. radiata has a well-defi ned annual reproductive cycle, in which temperature is probably the most important parameter for maturation and spawning [17] it can be assumed that all observed individuals are sexually mature. Potential off spring were not observed in the collected samples.…”

Section: Resultsmentioning

confidence: 98%

Rayed pearl oyster Pinctada radiata (Leach, 1814) (Bivalvia: Pteriidae) in the eastern Adriatic Sea – recent observations

Cetinić¹,

Grđan²,

Bolotin³

2023

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Adriatic Sea as a part of the Mediterranean is settled by many introduced species which extend their range northward. Among them is the rayed pearl oyster Pinctada radiata, a mollusk of Indo-Pacific origin that colonises habitats throughout the Mediterranean. P. radiata established a population in a fish farm on the island of Mljet in the Adriatic Sea, which was observed in 2017. To determine the status of the population, 48 specimens of P. radiata were randomly sampled from the ropes of a fish farm in 2019. Morphometric parameters were determined using a digital calliper. The recorded parameters showed that shell height ranged from 50.55 mm to 72.98 mm, shell length from 46.66 mm to 71.15 mm, and shell width from 19.98 mm to 58.54 mm. During additional visual survey in 2020 the presence of the spat within population at Mljet fish farm was not observed. It appears that only adult specimens are present, and it is unclear if the population is reproducing. In addition, P. radiata spat was observed in the shallow waters of Lokrum Island in 2021 and 2022, indicating the possibility of survival of larvae naturally dispersing from pre-existing populations. An adult specimen of P. radiata was also observed in Mali Ston Bay on two occasions, in 2009 and 2021. P. radiata, a highly adaptable species that tolerates a wide range of environmental factors, has successfully colonised new habitats.

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Section: Resultsmentioning

confidence: 98%

Rayed pearl oyster Pinctada radiata (Leach, 1814) (Bivalvia: Pteriidae) in the eastern Adriatic Sea – recent observations

Cetinić¹,

Grđan²,

Bolotin³

2023

Naše more

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“…It seems that gametogenesis of clams was affected by local environmental conditions. In temperate waters, rising temperatures in summer months can synchronise the ripe and spawning stages of bivalve molluscs [ 16 , 30 , 31 , 32 , 33 , 34 , 35 , 36 ]. According to Nelson (1928) [ 32 ], spawning of bivalve molluscs occurs on a rising temperature, but maturation progress is triggered at a temperature slightly below that in which spawning occurs.…”

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 annual gametogenic cycle of the rock oyster, Saccostrea cucullata, from the Persian Gulf

et al. 2023

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Reproductive cycle of the pearl oyster, Pinctada radiata (Mollusca: Pteridae), in the Zarat site (Gulf of Gabès, Tunisia)

Cited by 11 publications

References 15 publications

Rayed pearl oyster Pinctada radiata (Leach, 1814) (Bivalvia: Pteriidae) in the eastern Adriatic Sea – recent observations

Rayed pearl oyster Pinctada radiata (Leach, 1814) (Bivalvia: Pteriidae) in the eastern Adriatic Sea – recent observations

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

The annual gametogenic cycle of the rock oyster, Saccostrea cucullata, from the Persian Gulf

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