Feeding activity of mussels Mytilus edulis related to near-bed currents and phytoplankton biomass

Dolmer, Per

doi:10.1016/s1385-1101(00)00052-6

Cited by 118 publications

(61 citation statements)

References 42 publications

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“…4) using the allometric equations above and CR = 0.548W 0.879 (Haure et al 1998) , and in ambient algae concentration the population in the present study can be calculated to clear the water column with 15% of its capacity and 53% at high algae concentration. Dolmer (2000) calculated the in situ clearance rate of a population of M. edulis from the number of active individuals and valve gap size. In that study, he found that 25-67% of the population was closed during measurements depending on the ambient Chl a level and thus realizing between approx.…”

Section: Discussionmentioning

confidence: 99%

“…We strongly believe that including the aspects of population and inter-species interactions are needed if the ecological impacts of populations of suspension feeding bivalves are to be assessed. Several authors report in situ clearance rates based on algal concentration profiles above mussel beds and the reduction of seston concentration in near-bottom layers allows area grazing calculations (e.g., Dolmer 2000). To our knowledge, the aspect of population interactions has only been addressed by a few other researchers: Prins et al (1996) has studied in situ grazing of a mussel bed by a 12 m long, 0.8 m width 'Benthic Ecosytem Tunnel' equipped with current speed monitor and battery driven water samplers, and Asmus and Asmus (1991) used the Sylt flume (20 ¥ 2 ¥ 2 m), which canalized the tidal water over a bed of Mytilus edulis L.…”

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confidence: 99%

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In situ method for measurements of community clearance rate on shallow water bivalve populations

Hansen

Dolmer

Vismann

2011

Limnology & Ocean Methods

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The ecological impact of a species is most often assessed by extrapolating laboratory results to nature. In the case of clearance rates of suspension feeding bivalves, the laboratory results are typically maximal clearance rates measured on single individuals at constant conditions. The legitimacy of such extrapolations has for long been questioned and the possible bias has been studied by performing field measurements. In such field measurements, the focus has been on the use of natural seawater (e.g., Bayne et al. 1977;Bayne and Widdows 1978;MacDonald and Ward 2009). In these studies, the bivalves were collected from its natural habitat, transported to a land-or ship-based experimental setup and clearance measured using ambient seawater. In other studies, the collected animals were introduced to experimental setups, which were placed in the field during measurements (e.g., Vismann 1990;Cranford and Hargrave 1994; Cranford and Hill 1999;Pouvreau et al. 2000). The latter three studies used the bio-deposit method (Iglesias et al. 1992), which allows for a fuller study of feeding, particle selection, and absorption rates at different ambient conditions. However, the studies focused upon the effect of ambient conditions at the level of individual bivalves. Many marine bivalves live at very high densities where interspecific and intraspecific interactions are most likely to occur. We strongly believe that including the aspects of population and inter-species interactions are needed if the ecological impacts of populations of suspension feeding bivalves are to be assessed. Several authors report in situ clearance rates based on algal concentration profiles above mussel beds and the reduction of seston concentration in near-bottom layers allows area grazing calculations (e.g., Dolmer 2000). To our knowledge, the aspect of population interactions has only been addressed by a few other researchers: Prins et al. (1996) has studied in situ grazing of a mussel bed by a 12 m long, 0.8 m width 'Benthic Ecosytem Tunnel' equipped with current speed monitor and battery driven water samplers, and Asmus and Asmus (1991) used the Sylt flume (20 ¥ 2 ¥ 2 m), which canalized the tidal water over a bed of Mytilus edulis L. AbstractAn open-top chamber was designed for measuring ambient community clearance rate on undisturbed bivalve populations in the field. The chamber was pressed 5-10 cm down in the sediment on the mussel bed. It holds approximately 30-40 cm water column equal to a volume of 43-77 L. It was provided with an air lift connected to a SCUBA diver pressure tank generating a continuous and gentle water circulation. This ensures a complete mixture of suspended particles, and thereby, a maximum filtration by the bivalves. An in situ fluorometer was mounted to record plant pigment reduction due to mussel clearance in real-time. To calibrate the in situ fluorometer triplicate water samples were obtained initially in each of the bivalve filtration measurements. The water samples were filtrated, extracted, and later analyzed fo...

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Section: Discussionmentioning

confidence: 99%

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confidence: 99%

In situ method for measurements of community clearance rate on shallow water bivalve populations

Hansen

Dolmer

Vismann

2011

Limnology & Ocean Methods

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“…Recruitment in sown mussel beds is enhanced by the presence of older conspecifics (McGrorty et al 1990;McGrorty and Goss-Custard 1993). Therefore, one may speculate that numerous cohort 1 mussels packed between cohort 2 mussels may physically prevent them from opening properly, with ensuing negative effects on their clearance rate and food consumption (Jørgensen et al 1988;Dolmer 2000;Newell et al 2001;Riisgård et al 2006, but see Fréchette and Despland 1999). In this case the effect of cohort 1 mussels on individual mass of cohort 2 mussels may be modelled as…”

Section: Criterion For Density-dependent Growthmentioning

confidence: 99%

Body size, population density and factors regulating suspension-cultured blue mussel (Mytilusspp.) populations

Fréchette¹,

Lachance-Bernard²,

Daigle

2010

Aquat. Living Resour.

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-We sampled 27 month-old mussel populations grown on collector ropes in Cascapédia Bay, Quebec, to test whether density-dependent growth was present concomitantly to self-thinning, a process which was previously shown to occur in this system and thought to be driven by spatial constraints. Biomass-density curves of raw samples were curvilinear, suggesting density-dependent growth. However, at least two cohorts were present. Fractionating the samples on the basis of age yielded a linear relationship for the main, 2 year-old cohort. This implies density-independent growth and rules out food regulation in these populations. Therefore, our results are consistent with inferences drawn previously from the values of the self-thinning exponent, that is, space-regulated self-thinning. Our results suggest that curvilinearity of the raw biomass-density curves resulted from a bias caused by including the 1 year-old cohort and spat of the year in the analysis. This conclusion is supported by a model showing that samples with mixed cohorts can yield linear, concave or convex biomass-density curves without density-dependent growth. The shape of the curves depends on the scaling relationships between cohort abundances. It appears that the shape of biomass-density curves may be a useful complementary criterion -in addition to the value of self-thinning exponents -for the identification of food or space as factors regulating cultured populations. Key words:Mussel culture / Population regulation / Mussel density / Self-thinning Résumé -Le processus d'autoréduction (mortalité par compétition, "self-thinning") observé chez les populations de moules élevées sur collecteurs de naissain dans la baie de Cascapédia (Québec) a été attribué à la compétition pour l'espace. Dans le but de déterminer si la compétition affecte également la croissance individuelle, nous avons étudié la courbe biomasse-densité d'échantillons en culture depuis 27 mois. Nous observons des courbes concaves, ce qui à première vue correspond à un processus dépendant de la densité. Toutefois, les échantillons comptaient au moins deux cohortes. L'analyse des moules de la cohorte principale, âgée de 2 ans, indique une relation linéaire. La croissance est donc indépendante de la densité, ce qui exclut toute forme de compétition pour la nourriture et confirme les conclusions des travaux antérieurs, fondées sur la valeur de l'exposant de la fonction d'autoréduction. L'analyse suggère que la concavité des courbes biomasse-densité brutes s'explique par un biais causé par l'inclusion des moules âgées d'un an et du naissain dans l'analyse. Cette conclusion est appuyée par un modèle de l'effet du mélange des cohortes. Ce modèle indique qu'en absence de compétition, les courbes biomasse-densité peuvent être linéaires, convexes ou concaves, la forme de la relation dépendant de la relation entre les effectifs des cohortes. Il semble que la courbe biomasse-densité soit un outil diagnostique utile -s'ajoutant à l'exposant de la fonction d'autoréduction -pour la mise en évid...

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“…The growth rate of suspension-feeding bivalves is dependent upon a number of endogenous and environmental factors (Bayne and Newell, 1983), especially the amount of food ingested, which depends upon the food availability, filtration activity and selection process (Page and Hubbard, 1987;Richoux and Thompson, 2001). Food availability is correlated with phytoplankton dynamics (Dolmer, 2000). Variability in suspension-feeding activity by bivalves, particle processing under different environmental conditions including temperature range, seston concentration and particle quality have been extensively reported in the literature (Bayne et al, 1989).…”

Section: Introductionmentioning

confidence: 99%

Untitled

Lök¹,

Metin²,

Acarlı³

et al. 2010

Turk. J. Fish. Aquat. Sci.

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Considering the filtration capacity of mussels to qualitative particle selection, our study focused directly on ingested species by assessing mussel stomach content of various size classes (1-5 cm) over a year (August 97-June 98) rather than monitoring seawater samples. Different size of mussels (1, 2, 3, 4, 5 cm in length) was sampled monthly from the sides of fish cage floats in Urla-Izmir. Stomach contents were analyzed under microscope and different plankton species were grouped taxonomically. Bacillariophycea, Dinophyceae, Oxyphceae, Euglenophyceae as phytoplanktonic species were observed in the stomach contents of mussels as well as zooplanktonic species including Ciliata, Cladocera, Copepod, bivalve and gastropod larvae. Over the sampling period, according to the Bray-Curtis similarity test mussels' stomach for all sizes was of similar content except in August and October.

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Feeding activity of mussels Mytilus edulis related to near-bed currents and phytoplankton biomass

Cited by 118 publications

References 42 publications

In situ method for measurements of community clearance rate on shallow water bivalve populations

In situ method for measurements of community clearance rate on shallow water bivalve populations

Body size, population density and factors regulating suspension-cultured blue mussel (Mytilusspp.) populations

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