Growth, Mortality, and Secondary Production in Natural Populations of the Blue Mussel, Mytilus edulis

1989 ◽  
Vol 46 (7) ◽  
pp. 1154-1159 ◽  
Author(s):  
A. L. Mallet ◽  
C. E. A. Carver
Keyword(s):  
Nova Scotia ◽  
Mytilus Edulis ◽  
Secondary Production ◽  
Blue Mussel ◽  
Natural Populations ◽  
Primary Determinant

Juveniles (17–26 mm) from 11 natural populations of the blue mussel Mytilus edulis were each transplanted to nine sites along the coast of Nova Scotia, Canada. Production was determined from the growth and mortality profiles of each stock over the period from November 1985 to December 1986. Stock and stock by season explained 26.6% of the variance in production whereas site and site by season accounted for 24.1%. Stock and its interactions explained most of the variance in mortality, while site and its interactions were more important in explaining the variance in growth. Growth, rather than mortality, was the primary determinant of production.

Mortality Variations in Natural Populations of the Blue Mussel, Mytilus edulis

1987 ◽  
Vol 44 (9) ◽  
pp. 1589-1594 ◽  
Author(s):  
A. L. Mallet ◽  
C. E. A. Carver ◽  
S. S. Coffen ◽  
K. R. Freeman
Keyword(s):  
Mytilus Edulis ◽  
Environmental Gradient ◽  
Blue Mussel ◽  
Natural Populations ◽  
Seasonal Patterns ◽  
Cumulative Mortality ◽  
Variable Environments ◽  
Wide Range ◽  
Stressful Environments ◽  
Physiological Flexibility

To investigate environmental and seasonal patterns of mortality among natural populations of the blue mussel, Mytilus edulis, we transplanted 11 stocks of juvenile mussels to nine sites along the coast of Nova Scotia, Canada. Stock, Stock by Site, and Stock by Season together accounted for 53% of the variance in mortality whereas Site and Season together explained less than 1% of the variance. Genetic variability among stocks was inferred from differences in their cumulative mortality averaged over all environments. Several stocks, however, exhibited similar levels of mortality over all sites and were apparently insensitive to the environmental gradient. This implies physiological flexibility or the ability to tolerate a wide range of environmental conditions. We conclude that the blue mussel adapts to variable environments by maintaining both physiologically flexible and genetically variable populations. In addition, we noted that stocks originating from more stressful environments tended to exhibit lower mortalities than those originating from less stressful environments.

scholarly journals Distribution and frequency of mitochondrial DNA polymorphisms in blue mussel (Mytilus edulis) populations of southwestern Nova Scotia (Canada)

2018 ◽  
Vol 96 (6) ◽  
pp. 608-613 ◽  
Author(s):  
Donald T. Stewart ◽  
Marion Sinclair-Waters ◽  
Alexandra Rice ◽  
Ryan A. Bunker ◽  
Brent M. Robicheau ◽  
...  
Keyword(s):  
Nova Scotia ◽  
Mytilus Edulis ◽  
Blue Mussel ◽  
Phylogenetic Analyses ◽  
Role Reversal ◽  
Dna Polymorphisms ◽  
Swimming Velocity ◽  
Uniparental Inheritance ◽  
Doubly Uniparental Inheritance ◽  
Mt Genome

The Atlantic blue mussel (Mytilus edulis Linnaeus, 1758) exhibits doubly uniparental inheritance of mitochondrial (mt) DNA. Females are usually homoplasmic for a female-transmitted mt genome (the F type) and males are heteroplasmic for an F type and a male-transmitted mt genome (the M type). F types can undergo “role-reversal” events, resulting in new male-transmitted mtDNA genomes known as recently masculinized (RM) types that co-occur in populations with evolutionarily older standard-male (SM) types. Phylogenetic analyses have shown that RM types periodically replace SM types. It has also been shown that sperm with RM mtDNA have greater swimming velocity and more efficient components of the electron transport chain compared to sperm with SM mtDNA, thus leading to the hypothesis that RM sperm may have a selective advantage over SM sperm. The present study examines the distribution of RM and SM mitotypes in male M. edulis (n = 225) from 13 localities in southwestern Nova Scotia (Canada). The SM type was more common in all populations, with the proportion of RM types ranging from 0% to 24.1%. The highest proportion of RM types was observed in an aquaculture operation. Analyses of additional populations are required to evaluate the selective pressures affecting the geographic distribution of RM and SM mitotypes in M. edulis.

scholarly journals Differential Segregation Patterns of Sperm Mitochondria in Embryos of the Blue Mussel (Mytilus edulis)

Genetics ◽  
2004 ◽  
Vol 166 (2) ◽  
pp. 883-894
Author(s):  
Liqin Cao ◽  
Ellen Kenchington ◽  
Eleftherios Zouros
Keyword(s):  
Mitochondrial Dna ◽  
Mytilus Edulis ◽  
Blue Mussel ◽  
Uniparental Inheritance ◽  
Male Gonad ◽  
Doubly Uniparental Inheritance ◽  
Organelle Genomes ◽  
Somatic Tissues ◽  
Tight Linkage ◽  
Mitotracker Green

Abstract In Mytilus, females carry predominantly maternal mitochondrial DNA (mtDNA) but males carry maternal mtDNA in their somatic tissues and paternal mtDNA in their gonads. This phenomenon, known as doubly uniparental inheritance (DUI) of mtDNA, presents a major departure from the uniparental transmission of organelle genomes. Eggs of Mytilus edulis from females that produce exclusively daughters and from females that produce mostly sons were fertilized with sperm stained with MitoTracker Green FM, allowing observation of sperm mitochondria in the embryo by epifluorescent and confocal microscopy. In embryos from females that produce only daughters, sperm mitochondria are randomly dispersed among blastomeres. In embryos from females that produce mostly sons, sperm mitochondria tend to aggregate and end up in one blastomere in the two- and four-cell stages. We postulate that the aggregate eventually ends up in the first germ cells, thus accounting for the presence of paternal mtDNA in the male gonad. This is the first evidence for different behaviors of sperm mitochondria in developing embryos that may explain the tight linkage between gender and inheritance of paternal mitochondrial DNA in species with DUI.

Are bio-based and biodegradable microplastics impacting for blue mussel (Mytilus edulis)?

2021 ◽  
Vol 167 ◽  
pp. 112295
Author(s):  
Amina Khalid ◽  
Aurore Zalouk-Vergnoux ◽  
Samira Benali ◽  
Rosica Mincheva ◽  
Jean-Marie Raquez ◽  
...  
Keyword(s):  
Mytilus Edulis ◽  
Blue Mussel

Effects of long-term exposure to silver or copper on growth, bioaccumulation and histopathology in the blue mussel Mytilus edulis

1984 ◽  
Vol 11 (4) ◽  
pp. 253-274 ◽  
Author(s):  
A. Calabrese ◽  
J.R. MacInnes ◽  
D.A. Nelson ◽  
R.A. Greig ◽  
P.P. Yevich
Keyword(s):  
Mytilus Edulis ◽  
Blue Mussel
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