Environmental and physiological controls on shell microgrowth pattern of Ruditapes philippinarum (Bivalvia: Veneridae) from Japan

Kanazawa, Taku; Sato, Shinichi

doi:10.1093/mollus/eym049

Cited by 34 publications

(18 citation statements)

References 26 publications

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“…This enables the study of the impact of environmental drivers on the ecology and physiology of bivalves over time in natural populations from different climatic or ecological settings. Moreover, lunar, daily, or even tidal cycles are distinguishable in some fast growing species, at least a posteriori (e.g., Chauvaud et al, 2005;Kanazawa and Sato, 2008). Further, archived banding patterns allow reconstruction of lifetime growth history, including long-term trends, such as climate driven decadal patterns (e.g., Schöne et al, 2005), as well as unique physical disturbance events caused by storms, predator attack, extreme temperatures or even incidents of low oxygen concentrations (Witbaard and Klein, 1994;Sejr et al, 2002).…”

mentioning

confidence: 99%

Bivalve models of aging and the determination of molluscan lifespans

Abele

Brey

Philipp

2009

Experimental Gerontology

130

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a b s t r a c tBivalves are newly discovered models of natural aging. This invertebrate group includes species with the longest metazoan lifespan approaching 400 y, as well as species of swimming and sessile lifestyles that live just for 1 y. Bivalves from natural populations can be aged by shell growth bands formed at regular intervals of time. This enables the study of abiotic and biotic environment factors (temperature, salinity, predator and physical disturbance) on senescence and fitness in natural populations, and distinguishes the impact of extrinsic effectors from intrinsic (genetic) determinants of animal aging. Extreme longevity of some bivalve models may help to analyze general metabolic strategies thought to be life prolonging, like the transient depression of metabolism, which forms part of natural behaviour in these species. Thus, seasonal food shortage experienced by benthic filter feeding bivalves in polar and temperate seas may mimic caloric restriction in vertebrates. Incidence of malignant neoplasms in bivalves needs to be investigated, to determine the implication of late acting mutations for bivalve longevity. Finally, bivalves are applicable models for testing the implication of heterozygosity of multiple genes for physiological tolerance, adaptability (heterozygote superiority), and life expectancy.Ó 2009 Elsevier Inc. All rights reserved. Bivalves: a diverse set of models for aging studies and environmental recordersCommonly used animal models for cellular and molecular mechanisms underlying the process of aging, such as Drosophila melanogaster, Caenorhabditis elegans or small rodents, are bred and reared under controlled laboratory conditions. Most of these aging models are short lived (days in C. elegans, weeks in D. melanogaster, <5 y in rodents) and, hence, may not show all the age-dependent changes of long-lived species (Reznik, 1993;Kirkwood, 2002). Especially, short lived models are not representative of the negligible aging type (Finch, 1990;Terzibasi et al., 2007). Further, aging under controlled laboratory conditions may differ significantly from aging in the wild, and the applicability of the results to natural animal populations is often questionable. Good reasons to establish animal models that can be sampled from a range of environmental settings and scenarios, but at the same time provide information on their individual life history, including their chronological age (Austad, 1996).Such new models are found among bivalve molluscs. Worldwide, approximately 20,000 species (Pearse et al., 1987) of marine bivalves exist so that this class offers a rich diversity of lifestyles, adaptations to specific environmental conditions and corresponding strategies of aging, albeit based on the same filter feeder blueprint in the majority of species. Some bivalve species, like the long-lived ocean quahog, Arctica islandica or the blue mussel Mytilus edulis exhibit broad geographical distribution, with habitats spanning large latitudinal ranges and covering different climate zones. Other sp...

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confidence: 99%

Bivalve models of aging and the determination of molluscan lifespans

Abele

Brey

Philipp

2009

Experimental Gerontology

130

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“…The appearance of clams with partially spawned and/or spent gonads indicated the spawning season of the clam population. These five stages are basically the same as those used to investigate the reproductive biology of the Manila clam in several previous studies (Drummond et al 2006;Kanazawa and Sato 2008;Uddin et al 2012). …”

Section: Histological Analysis Of the Gonadsmentioning

confidence: 99%

Reproduction of an alienRuditapesclam (Bivalvia: Veneridae) on recreational clam-gathering grounds in Tokyo Bay, Japan

2014

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The Manila clam Ruditapes philippinarum is an important fisheries resource and popular recreational native species in Japan. To counter the domestic shortage of Manila clams caused by depleted catches, similar clams were introduced into Japan from China and the Korean peninsula. The introduced clam is an unnamed morph closely related to R. philippinarum that originates from southern China. Its shell is morphologically different from that of the typical Manila clam and there are small but distinct genetic differences. There is evidence to suggest that the Chinese morph may hybridize with the Manila clam in the Ariake Sea, but not in Tokyo Bay. We carried out studies to determine the degree of overlap of the breeding seasons of both taxa by collecting samples of the Manila clam and the alien clam released onto recreational clam-gathering grounds in Tokyo Bay and their gonadal maturity was examined histologically. Spawning-stage individuals of the Manila clam appeared from April to August and those of the southern Chinese morph from July to August, indicating overlapping spawning periods and thus the potential for hybridization. We discussed the forming condition of the hybridized clam population in terms of reproduction and recruitment process of the clams.

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“…In this review unusual biominerals influenced by unexpected environmental events, and caused by anthropogenic activity in several groups of marine organisms, freshwater and subterranean snails will be presented. In order to explain how complex and sentinel mechanisms regulate environmental and physiological functions in the mollusks, a concise report of outstanding study related to the shell microgrowth patterns of bivalve Ruditapes philippinarum performed by Kanazawa and Sato (2008) will be presented. They found that each microgrowth increment in the shell corresponds to one lunar day and the local tidal periodicity could be easily determined from it ( Figure 1).…”

Section: Environmentaly Induced Biomineralizationmentioning

confidence: 99%