Growth, mortality and production of organic matter by a rocky intertidal population of Mytilus edulis in the Quoddy Region of the Bay of Fundy

Gardner, J. P. A.; Thomas, M. C. C.

doi:10.3354/meps039031

Cited by 34 publications

(26 citation statements)

References 14 publications

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“…Since the content of calories in organic matter of aquatic animals is close to 5 kcal g- (Ostapenia, 1968;Winberg, 1971a;Milne & Dunnet, 1972;Dare & Edwards, 1975;Gardner & Thomas, 1987), the body composition data were used to calculate the caloric content of the animal. For estimating the mass growth rate and calculating the bioenergetic parameters of U. terminalis, we used relationships between shell length (L, cm), total wet mass (g), soft tissue wet mass (g) and shell mass (g).…”

Section: Methodsmentioning

confidence: 99%

Distribution, growth, production, and ecological significance of the clam Unio terminalis in Lake Kinneret, Israel

1993

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The distribution, body composition, growth rate, and population structure of Unio terminalis were measured at different sites of Lake Kinneret (Israel). Maximum clam density was found on the muddy sand between 0.3-6 m depth. Clams were most abundant in the River Jordan inlet zone, where they showed the highest growth rate. This was probably related to both highest food availability and the highest density of fish hosting Unio glochidia in this area. U. terminalis in Lake Kinneret has a more massive shell and ash content as compared with the European Unio species. The annual P/B ratios of U. terminalis populations at different sites were similar and ranged within 0.17-0.18. The computated filtration capacity and energetic budget permit the assumption that the U. terminalis population plays a substantial role in removal of organic particles from the water in the Kinneret shallow inshore zone (up to 15 m depth), and in nutrient recycling.

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Section: Methodsmentioning

confidence: 99%

Distribution, growth, production, and ecological significance of the clam Unio terminalis in Lake Kinneret, Israel

1993

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“…3) a linear relationship between age and shell length for mussels between the ages of 2 and 5 yr [see also Gardner & Thomas (1987) for another example of linearity between the ages of 1 and 3.5 yr for a population exhibiting indeterminate growth); thereafter there is a distinct reduction in shell growth as the plateau of the growth curve is approached. Using their von Bertalanffy growth equation, the shell length at that age of 5 yr is 52.4 mm, and is remarkably similar to the length coordinate of the inflexion in the total (50.3 mm), mantle (50.1 mm) and remaining (52.7 mm) weights of tissues presented here (Table 2).…”

Section: Discussionmentioning

confidence: 99%

Aspects of reproduction associated with the use of a segmented regression to describe the relationship between body weight and shell length of Mytilus edulis

Salkeld¹

1995

Mar. Ecol. Prog. Ser.

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Data on total dry tissue weight and shell length were obtained from an intertidal population of Mytilus edulis located in an estuary in SW England. Representation of the loglo transformed data is significantly improved by the use of a segmented regression instead of a single linear regression. There is a significant reduction in the slope (b) of the regression, relating total dry tissue weight (y) to shell length ( X ) , for mussels over 50.3 mm. This pertains also to the component tissues: mantle (at 50.1 mm shell length), digestive gland (at 60.4 mm) and remainder (at 52.7 mm). Weight of mantle tissue and of digestive gland does not change (b E 0), whilst remaining tissue increases, but at a reduced rate, as shell length increases in excess of these respective sizes. Stereological examination of sections of mantle tissue were made throughout the year. Results indicate that h~g h levels of reproductive tissue (i.e. >80% of mantle volume) are achieved in half as many large ~ndividuals (mean shell length 64.7 mm) as in 2 smaller size groups (means of 35.1 and 50.4 mm). These results suggest that reproductive effort increases to a maximum at a shell length of approximately 50 mm, thereafter declining as size increases. A segmented regression is also appropriate to describe the relationship of total tissue and mantle tissue weight to shell length of a sample from another estuarine population, but not from a wave exposed, open shore population. Reasons for these observations are discussed in the context of the feeding: metabolism ratio, availability of food and age.

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“…Somatic growth in mussels is high in summer, linked to the period of maximum phytoplankton production (mid-June to early September Demers et al, 1987), low in winter due to low water temperatures and low food quantity and/or quality (Alunno et al, 2000). In natural populations of mussels, production could also be limited by physiological stress (Koehn and Bayne, 1989), primary space (Paine and Levin, 1981) and predation (Dare, 1976b;Gardner and Thomas, 1987), but food availability is probably the major factor affecting growth (Jørgensen, 1979;Fréchette 5 and Bourget, 1985;Gosling, 1992) which is also related to the emersion duration of a given intertidal level.…”

Section: Factors Affecting Mussel Growthmentioning

confidence: 99%

Small-scale variations in mussel (Mytilus spp.) dynamics and local production

Cusson

Bourget

2005

Journal of Sea Research

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A mussel bed was sampled monthly at four intertidal levels (mid: 2.15; mid-low: 1.65; low: 1.2 and sublittoral fringe: 0.7 m from chart datum) from July 1979 to July 1980 at Pointe-Mitis in the St.Lawrence estuary. Our results show a strong spring reduction of abundance (both in density and biomass), which suggests that the mussel bed was being degraded. Community perturbation was 5 attributed to ice scour. Partial reestablishment of the mussel bed (all age classes) was observed during late spring and early summer and occurred mainly at the mid-low intertidal level. Changes in the size structure of the mussel bed with level suggest that the annual windstorm regime may be an important factor in the dynamics of the bed. Mean body mass decreased at the three lower shore levels but increased at the highest shore level. Overall, net secondary production (assessed by the increment 10 summation method) was negative due to the decrease in mean body mass. Annual production (kJ m -2 yr -1 ) from the mid intertidal level to the sublittoral fringe were respectively 1130, -4072, -4013 and -3258 while P/B ratios (yr -1 ) were 0.17, -0.69, -0.50 and -0.45. The calculated production and the productivity (potential production) are compared and used to provide insight about the condition of the mussel bed. 15

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Growth, mortality and production of organic matter by a rocky intertidal population of Mytilus edulis in the Quoddy Region of the Bay of Fundy

Cited by 34 publications

References 14 publications

Distribution, growth, production, and ecological significance of the clam Unio terminalis in Lake Kinneret, Israel

Distribution, growth, production, and ecological significance of the clam Unio terminalis in Lake Kinneret, Israel

Aspects of reproduction associated with the use of a segmented regression to describe the relationship between body weight and shell length of Mytilus edulis

Small-scale variations in mussel (Mytilus spp.) dynamics and local production

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