Oocyte Atresia Characteristics and Effect on Reproductive Effort of Manila Clam <i>Tapes philippinarum</i> (Adams and Reeve, 1850)

Chérel, Daphné; Beninger, Peter G.

doi:10.2983/035.036.0302

Cited by 10 publications

(7 citation statements)

References 43 publications

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“…It is reasonable to suggest that the rare atretic oocytes with high-quality oocyte/fecundity reports might be associated with high hatching performance. This hypothesis is supported by Cherel and Beninger (2017) who reported the atretic oocyte level on bivalve reproduction, which is significantly related to oocyte mortality and leads to high mortality rates of early life stage bivalves.…”

Section: Discussionmentioning

confidence: 63%

Comparative stages of atretic oocytes between Episesarma versicolor and E. singaporense from Thailand: Implication on the reproductive success

Sudtongkong

Senarat

Kong-oh

et al. 2020

VIS

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Informative reviews on the oocyte atresia referring to degeneration and resorptive mechanism are warranted in common animals, but it is rarely still found in carbs. In this current study, we focused on characteristics and stage of the atretic oocyte from two important female sesarmid carbs (violet vinegar crab, Episesarma versicolor, and Singapore vinegar crab, E. singaporense) during ovarian maturation. A total of 30 female samples in each carb species were collected from the Palian mangrove area of Trang province, Thailand. The results shared among those carb samples that both primary growth (PGs) and secondary growth (SGs) phases underwent a degenerative process of atresia. The latter of atresia during SGs was also divided into five stages (I, II, III, IV, and V). The degeneration of follicular cell and yolk architecture identifying in the SGs were highlighted. The number of atresias was slightly compared between E. versicolor and E. singaporense; therefore, there were no significant differences. Our observation suggested that the low number of atresia might be associated with the increased reproductive success of two female sesarmid carb living in natural habitats.

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Section: Discussionmentioning

confidence: 63%

Comparative stages of atretic oocytes between Episesarma versicolor and E. singaporense from Thailand: Implication on the reproductive success

Sudtongkong

Senarat

Kong-oh

et al. 2020

VIS

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“… Note : Total active gametogenesis = individuals for which mature oocytes ≥20% of gamete volume fraction; April–May = aggregated data from all years for these 2 months, during which all atresia is prespawning. Data from Chérel and Beninger (2017) and Chérel et al (2020). …”

Section: Resultsmentioning

confidence: 99%

“…Previous work has highlighted the ubiquitous, often‐overlooked presence of atresic (degenerating) oocytes of all gametogenic stages within the gonads of marine bivalves (see Beninger, 2017; Chérel & Beninger, 2017, 2019; Chérel et al, 2020 for reviews and references). Despite the prolific scientific literature on reproductive cycles in high‐fecundity marine organisms, only one study to date has examined the viability of their spawned oocytes (Beninger et al, 2021), that is, what proportion are actually capable of being fertilized and beginning development?…”

Section: Introductionmentioning

confidence: 99%

“…Aggregated data for minimum atresic impact (defined as the percentage of mature oocyte volume fraction for which an atresic fate is known from histological profile) in two intertidal bivalve species, Cerastoderma edule and Tapes philippinarum, based on quantitative histological observations of the gonad, from two sites and years 2010Total active gametogenesis = individuals for which mature oocytes ≥20% of gamete volume fraction; April-May = aggregated data from all years for these 2 months, during which all atresia is prespawning. Data fromChérel and Beninger (2017) andChérel et al (2020).…”

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confidence: 99%

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Evolutionary and ecological insights from vital staining of bivalve oocytes: A Red Queen at the sweepstakes?

et al. 2022

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To determine the proportion of inviable oocytes that are spawned along with normal oocytes in marine bivalves, we turned to a time-honored technique not previously used on invertebrate oocytes: the neutral red vital stain. Despite the difficulty in obtaining induced spawns from field-collected Cerastoderma edule (L), the results and insights from this simple procedure to answer a simple question were unexpected and far-reaching. Mean proportions of inviable oocytes in the spawns of cockle C. edule ranged from 35% to 85%, with the vast majority represented by atresic (autolyzing) oocytes. These levels are in agreement with previous quantitative histological observations of prespawning atresia in both C. edule and the Manila clam Tapes philippinarum. Such elevated prefertilization inviability mirrors the known high level of postfertilization inviability in bivalves. Together, these high levels of inviability may account for much of the early mortality in the type III survivorship curves typical of marine bivalves. The combination of high fecundity and high oocyte inviability suggests a Red Queen-type reproductive dilemma in these species. In addition, the great degree of interindividual variation observed in oocyte inviability suggests that cockles, and perhaps other intertidal bivalves, present a Sweepstakes Reproductive Strategy, in which highly variable individual fecundity confronts a highly variable environment. The neutral red technique promises to be a useful tool for investigating prespawning inviability in other marine taxa, as well as for aquaculture, conservation, restocking, ecophysiology, and environmental monitoring.

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“…Warmer spring water temperatures triggered earlier gametogenesis for M. arenaria in Massachusetts (Brousseau, 1978), and a cold spring is suspected to have delayed reproduction in a population of R. philippinarum in Ireland (Xie & Burnell, 1994). Both clam species are capable of multiple spawns per season, and the timing of spawning depends on water temperature and geographic location ( R. philippinarum , Williams, 1980; Bourne, 1982; Toba et al., 2007; M. arenaria , Pfitzenmeyer, 1965; Porter, 1974).…”

Section: Introductionmentioning

confidence: 99%

Spatiotemporal variation in clam recruitment among beaches in Washington State (USA)

Kobelt,

Yiu,

Dethier

et al. 2024

Marine Ecology

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Abundant clam populations provide ecosystem services and commercial and recreational shellfish harvests worldwide. Two non‐native clams (Manila clams, Ruditapes philippinarum; eastern soft‐shell clams, Mya arenaria) commonly populate mid‐intertidal zones of coarse‐sediment beaches in Washington State, USA. To better understand factors influencing their abundance, we used passive mid‐intertidal spat collectors to determine the density and distribution of clam recruits (150–500 μm shell length) at eight beaches spanning over 500 km and over two reproductive seasons (2016 and 2017). Cumulative seasonal recruitment (clams <500 μm) in 2016 and 2017 at +1.0 m MLLW ranged from 800 to 125,000 m−2 for Ruditapes philippinarum and 50–85,000 m−2 for M. arenaria, and did not differ by substrate type at small scales (gravel vs. crushed shell). At larger scales, different interannual recruitment patterns across sites did not dramatically shift the ranked order of highest and lowest recruitment sites. Cumulative recruitment tended to be lower at warmer sites, while timing of peak recruitment was not consistently related to temperature. Sites also differed in the relative recruitment of the two clam species, but most beaches had greater densities of R. philippinarum than M. arenaria at both recruitment and juvenile stages. Although recruitment densities differed by two orders of magnitude across sites, post‐settlement factors eliminated initial spatial variation within a year, dampening recruitment variability among these beaches that all contribute to commercial and recreational clam production.

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Oocyte Atresia Characteristics and Effect on Reproductive Effort of Manila Clam Tapes philippinarum (Adams and Reeve, 1850)

Cited by 10 publications

References 43 publications

Comparative stages of atretic oocytes between Episesarma versicolor and E. singaporense from Thailand: Implication on the reproductive success

Comparative stages of atretic oocytes between Episesarma versicolor and E. singaporense from Thailand: Implication on the reproductive success

Evolutionary and ecological insights from vital staining of bivalve oocytes: A Red Queen at the sweepstakes?

Spatiotemporal variation in clam recruitment among beaches in Washington State (USA)

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