Comparative growth and survival patterns of <i>Mytilus trossulus</i> and <i>Mytilus edulis</i> in Atlantic Canada

Mallet, André L.; Carver, Claire E.

doi:10.1139/f95-780

Cited by 66 publications

(53 citation statements)

References 4 publications

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“…Specimens of Mytilus trossulus were from the intertidal zone of Rivière-auRenard (Québec, Canada; 48°00' N, 65°20' W, a location where M. edulis represents less than 20% of the mussel population), and specimens of M. edulis were obtained from a mussel farm located at House Harbour, Iles de la Madeleine, Canada (47°25' N, 61°50' W, where M. trossulus account for less than 4% of the mussel population, see Moreau et al 2005). Mus-sels used for spawning showed typical M. edulis and M. trossulus shell shape (McDonald et al 1991, Mallet & Carver 1995. Species identities were confirmed using the nuclear DNA PCR-based marker Glu-5' (Rawson et al 1996).…”

Section: Methodsmentioning

confidence: 85%

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Temperature effect on survival, growth, and triacylglycerol content during the early ontogeny of Mytilus edulis and M. trossulus

Rayssac¹,

Lacasse²,

Tremblay³

2010

Mar. Ecol. Prog. Ser.

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Temperature is a major factor contributing to the biogeography of intertidal poikilotherms. The population dynamics of intertidal invertebrates like mussels are strongly dependent on larval supply and larval mortality. Unlike adults, which are resistant to fluctuating environmental conditions, larvae are highly sensitive to the physicochemical conditions of the pelagic zone. The effects of rearing temperature on larval and post-larval performance of 2 coexisting mussels species, Mytilus edulis and M. trossulus, were examined in this study. In the first experiment, larvae of both species were reared separately at constant temperatures of 10, 17, and 24°C from D-larvae to the dissoconch stage. In the second experiment, pediveligers were reared under the same experimental conditions as the larvae for 2 wk. Survival, growth, and lipid composition (triacylglycerol [TAG] and sterol [ST] contents) were used to compare the performance of both species. The first experiment showed a species-specific thermal tolerance range, reflecting the biogeography of the species. M. trossulus larvae showed a preference for water at 10 and 17°C, corresponding to the more northerly distribution of this species, whereas M. edulis preferred temperatures of 17 and 24°C. Moreover, the TAG content in larvae of both species varied with temperature, supporting the hypothesis of a positive correlation between energy reserve content and the survival of mussel larvae. In contrast, the species-specific characteristics of thermal tolerance were not observed during post-larval development, suggesting that the selective effect of temperature on mussel species occurs during early ontogeny.

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Section: Methodsmentioning

confidence: 85%

“…Rawson et al 2001). Populations of both species coexist in the Gulf of St. Lawrence (Varvio et al 1988, Mallet & Carver 1995, Comesaña et al 1999, Innes & Bates 1999, Moreau et al 2005 and along the east coast of Maine, USA (Rawson et al 2001).…”

Section: Introductionmentioning

confidence: 99%

Temperature effect on survival, growth, and triacylglycerol content during the early ontogeny of Mytilus edulis and M. trossulus

Rayssac¹,

Lacasse²,

Tremblay³

2010

Mar. Ecol. Prog. Ser.

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“…Mussel growth has been compared between different estuaries (Mallet & Carver 1995), but there are few studies that examine spatial variation in growth within estuaries. Most studies have been conducted at a small scale, e.g.…”

Section: Discussionmentioning

confidence: 99%

Bay-scale spatial growth variation of mussels Mytilus edulis in suspended culture, Prince Edward Island, Canada

Waite¹,

Grant²,

Davidson³

2005

Mar. Ecol. Prog. Ser.

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Spatial growth variation of experimentally cultured blue mussels Mytilus edulis in Tracadie Bay, Prince Edward Island, Canada, was consistent in both years of a 2 yr study. The spatial pattern displayed reduced tissue growth along a gradient of decreasing tidal exchange from the inlet mouth to the inner estuary. There was no indication of persistent spatial differences in seston concentration among stations. The data imply that the flux of food (expressed as the product of concentration and current speed) controls the spatial variation in growth, with decreasing flux from the outer to inner bay. Growth trajectories analysed by polynomial regression differed between years despite spatial similarities within each year. Results of multiple regression analyses explaining mussel growth suggested that temporal variability in seston characteristics was more important in explaining growth than annual mean seston levels. Chlorophyll a and meat weight showed similar patterns of increase during 1998. In 1999, higher summer temperatures were more important in determining upper limits of growth, with later growth stimulation apparently in response to an autumn phytoplankton bloom. The pattern of spatial variability in mussel growth, representing decreased growth rates in the inner relative to the outer bay, provided evidence that the density of mussels in Tracadie Bay was exceeding the food supply.KEY WORDS: Mussels · Mussel growth · Food availability · Phytoplankton · Aquaculture · Carrying capacity Resale or republication not permitted without written consent of the publisherMar Ecol Prog Ser 297: [157][158][159][160][161][162][163][164][165][166][167] 2005 There are many scales at which food limitation can affect the growth of cultured bivalves. High density at a local scale (e.g. within socking sleeves) may lead to reduced growth of interior bivalves (Parsons & Dadswell 1992, Côté et al. 1994. Seston depletion resulting from the distribution of bivalves on longlines may also affect their growth in the centre of a farm (Pilditch et al. 2001). A large-scale gradient in mussel growth can occur as a result of the interaction between the distribution of phytoplankton, the filtration capacity of local populations, and water circulation patterns in heavily cultured embayments (Dolmer 2000). Seston depletion might be expected to be most severe in the innermost part of a bay if the majority of the food supply is from incoming tides (Dowd 2000). There are surprisingly few studies of spatial variation in growth of cultured bivalves despite the potential importance of this factor to shellfish growth.This study investigated the relationship between blue mussel growth and food supply within an intensely cultured embayment in PEI. Mussel growth was measured coincident with monitoring seston concentrations and temperature at 5 geographically distinct locations within the embayment. Growth trajectories were described statistically and the interaction between mussel growth, environmental variables, and location examined. In a...

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“…In a previous report, Jericho Beach (Locarno) mussels were found to be 98% M. trossulus based on shell morphometry measurements (Mallet, 2003). Mussels used for the isolation of p53 were subsequently identified and confirmed by the same method by Mallet Research Services, NS (McDonald et al, 1991;Mallet et al, 1995).…”

Section: Introductionmentioning

confidence: 99%

Identification and phylogenetic comparison of p53 in two distinct mussel species (Mytilus)

Muttray

Cox

St-Jean

et al. 2005

Comparative Biochemistry and Physiology Part C: Toxicology &

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The extent to which humans and wildlife are exposed to anthropogenic challenges is an important focus of environmental research. Potential use of p53 gene family marker(s) for aquatic environmental effects monitoring is the long-term goal of this research. The p53 gene is a tumor suppressor gene that is fundamental in cell cycle control and apoptosis. It is mutated or differentially expressed in about 50 % of all human cancers and p53 family members are differentially expressed in leukemic clams. Here we report the identification and characterization of the p53 gene in two species of Mytilus, Mytilus edulis and Mytilus trossulus, using RT-PCR with degenerate and specific primers to conserved regions of the gene. The Mytilus p53 proteins are 99.8 % identical and closely related to clam (Mya) p53. In particular, the 3' untranslated regions were examined to gain understanding of potential post-transcriptional regulatory pathways of p53 expression. We found nuclear and cytoplasmic polyadenylation elements, adenylate/uridylate-rich elements, and a K-box motif previously identified in other, unrelated genes. We also identified a new motif in the p53 3'UTR which is highly conserved across vertebrate and invertebrate species. Differences between the p53 genes of the two Mytilus species may be part of genetic determinants underlying variation in leukemia prevalence and/or development, but this requires further investigation. In conclusion, the conserved regions in these p53 paralogues may represent potential control points in gene expression. This information provides a critical first step in the evaluation of p53 expression as a potential marker for environmental assessment.

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Comparative growth and survival patterns of Mytilus trossulus and Mytilus edulis in Atlantic Canada

Cited by 66 publications

References 4 publications

Temperature effect on survival, growth, and triacylglycerol content during the early ontogeny of Mytilus edulis and M. trossulus

Temperature effect on survival, growth, and triacylglycerol content during the early ontogeny of Mytilus edulis and M. trossulus

Bay-scale spatial growth variation of mussels Mytilus edulis in suspended culture, Prince Edward Island, Canada

Identification and phylogenetic comparison of p53 in two distinct mussel species (Mytilus)

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