Burrowing ability as a key trait in the establishment of infaunal bivalve populations following competitive release on an extensive intertidal sandflat

Takeuchi, Seiji; Yamada, Fumihiko; Shirozu, Hajime; Ohashi, Satoshi; Tamaki, Akio

doi:10.1016/j.jembe.2015.01.011

Cited by 17 publications

(12 citation statements)

References 62 publications

(118 reference statements)

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“…Strongly ornamented shells such as the warty venus, characterized by very marked concentric ridges (Tebble, 1966), is considered as an adaptation for shallow burrowers to increase stability close to the sediment interface (Stanley, 1970). Therefore, this ability to burrow and stay in the sediment represent an advantage to avoid passive secondary migration processes (St-Onge et al, 2007;Takeuchi et al, 2015).…”

Section: Discussionmentioning

confidence: 99%

Temporal variation of secondary migrations potential: concept of temporal windows in four commercial bivalve species

Forêt

Tremblay

Neumeier

et al. 2018

Aquat. Living Resour.

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Post-settlement dispersal potential of four commercial bivalve species (Mytilus edulis, Pecten maximus, Venus verrucosa and Ruditapes philippinarum) were studied through the assessment of recruits' sinking velocities by using a sinking velocity tube of five meters height. In parallel, dynamics of shear stress were monitored for five months on a tidal habitat characterized by the presence and the dispersal of the four species. By coupling both datasets we propose first theoretical estimates of temporal windows of secondary migrations. These experiments revealed interspecific differences in migration potential relate to shell shapes and behaviour, especially to secretion of byssal threads. The sensitivity to passive and active post-settlement migrations seems to rely on the synchronisation between the arrival on the sediment, the tidal regime (spring tide, neap tide), but also the rate of growth of the recruits. The present study confirms that patterns of secondary migrations of bivalve recruits result from a close physical-biological coupling involving benthic boundary layer (BBL) hydrodynamics and shell morphology as well as eco-ethological responses to environmental conditions but clearly modulated by the growth dynamics until a threshold size when drifting is no longer possible.

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Section: Discussionmentioning

confidence: 99%

Temporal variation of secondary migrations potential: concept of temporal windows in four commercial bivalve species

Forêt

Tremblay

Neumeier

et al. 2018

Aquat. Living Resour.

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“…In this context, juveniles may be more at risk than adults due to the former's more limited burrowing depths (Stanley, 1970;Kondo, 1987). Takeuchi et al (2015) found that juvenile R. philippinarum clams burrow into the sediments more rapidly under a light condition than under a dark one. The authors concluded that this result can be explained by an adaptive behavioral trait against visually hunting predators.…”

Section: Introductionmentioning

confidence: 91%

“…The globally-distributed infaunal clam Ruditapes philippinarum (Adams & Reeve) (Toba et al, 1992;Vincenzi et al, 2011;Humphreys et al, 2015;Talley et al, 2015;Cordero et al, 2017) exhibits a highly polymorphic shell coloration which is largely determined genetically (Peignon et al, 1995;Huo et al, 2017), but the function of the coloration remains uncertain. Their habitats extend from intertidal to shallow-subtidal zones often covering a wide range of sediment types (i.e., from muddy sand, through sand, to gravel sand; and also patches of shell fragments) (Kondo, 1987;Takeuchi et al, 2013;Takeuchi et al, 2015;Talley et al, 2015). Ruditapes philippinarum clams with shell lengths < 15 mm were defined as juveniles, since their smallest mature shell length is approximately 15 mm (Toba et al, 1992).…”

Section: Introductionmentioning

confidence: 99%

“…Visual predation by birds and fish is an important source of mortality of R. philippinarum clams, especially in their juvenile stage (Toba et al, 1992;Nakahara and Nasu, 2002;Kimura, 2005;Shigeta and Usuki, 2012;Takahashi et al, 2016). Ruditapes philippinarum clams are sometimes dislodged from the sediments by abrupt sediment erosion induced by hydrodynamic disturbance (Kakino, 2000;Takeuchi et al, 2015), and clams exposed onto the sediment surface will undergo an elevated predation risk. In this context, juveniles may be more at risk than adults due to the former's more limited burrowing depths (Stanley, 1970;Kondo, 1987).…”

Section: Introductionmentioning

confidence: 99%

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Visual crypsis as a possible function of polymorphic shell coloration in the infaunal clam Ruditapes philippinarum

Takeuchi

Suzuki

Nakagawa

et al. 2018

Journal of Sea Research

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The infaunal clam Ruditapes philippinarum exhibits highly polymorphic shell coloration, but the function of the coloration remains uncertain. Here, a hypothesis that such shell coloration functions to enhance visual crypsis (i.e., background color matching) in juveniles (<15 mm in shell length) was tested with a combination of a field survey and laboratory experiments. Shell and background colorations were expressed as mean brightness values. Firstly, the association between shell and background brightness was investigated. For this, a field survey for two sympatric subpopulations with distinct substrates was conducted on an intertidal sandflat in western Kyushu, Japan. Secondly, the visual-crypsis hypothesis was tested experimentally using half-valve clam shells filled with paste of raw clam meat as prey and the pufferfish Takifugu niphobles as a visually hunting predator, in a tank with one to two dark-colored substrates and one light-colored substrate. Our field survey showed that shell brightness significantly differed between the two sympatric subpopulations of juvenile clams and was positively associated with background brightness. Our laboratory experiments indicated that prey items with comparatively light (dark) coloration on dark-(light-) colored substrate were consumed by predators more immediately and at a higher rate than in the color-matched combinations. Consequently, shell−background color matching could help juvenile clams avoid attack from visually hunting predators. The results provide a new insight into effective management planning for this clam species, creating sand habitats with a more matched coloration.

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“…As an intermediate of the above two groups, some other infaunal, free‐burrowing bivalves including Ruditapes philippinarum (Adams & Reeve, 1850) retain their competence to produce byssus threads throughout their lifespan (Bieler, Mikkelsen, & Prezant, ; Mikkelsen, Bieler, Kappner, & Rawlings, ; Quayle, ; Yoshida, ). Ruditapes philippinarum clams, juveniles in particular, are vulnerable to repeated sediment erosion due to their lower burrowing performance (Takeuchi et al, ; Takeuchi, Yamada, Shirozu, Ohashi, & Tamaki, ), and therefore, firm fixation by producing byssus threads is important to reduce dislodgement risk in unstable sediments (de Montaudouin, ). The byssus production frequency, however, decreases with growth.…”

Section: Introductionmentioning

confidence: 99%

Byssus production ability and degree of byssal‐gland development in the infaunal clam Ruditapes philippinarum

2019

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Byssus production of Ruditapes philippinarum clams becomes reduced with growth. This tendency is well recognized but has not been analysed in detail. Additionally, it remains uninvestigated whether the lack of competence to produce byssus threads in the adult stage is caused by atrophy of the byssal glands or not. The objective of this study was to evaluate the byssus production ability of clams through the juvenile to adult stages and to examine the importance of two endogenous factors (i.e. shell size, somatic condition) in determining the byssus production probability (proportion of clams with byssus production in a population). This study also histologically confirmed the presence of byssal glands in juvenile to adult clams. For these purposes, field surveys to investigate the relationship among byssus production, shell size and somatic condition of clams collected from four intertidal sites and a histological study for byssal glands of the clams was conducted. This study revealed that byssus production probability decreases with increasing shell size and declining somatic condition and that the lack of byssus production is not caused by the loss of the byssal glands.

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Burrowing ability as a key trait in the establishment of infaunal bivalve populations following competitive release on an extensive intertidal sandflat

Cited by 17 publications

References 62 publications

Temporal variation of secondary migrations potential: concept of temporal windows in four commercial bivalve species

Temporal variation of secondary migrations potential: concept of temporal windows in four commercial bivalve species

Visual crypsis as a possible function of polymorphic shell coloration in the infaunal clam Ruditapes philippinarum

Byssus production ability and degree of byssal‐gland development in the infaunal clam Ruditapes philippinarum

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