Condition and variability in Mytilus edulis (L.) from different habitats in Ireland

Aldrich, John; Crowley, Michael

doi:10.1016/0044-8486(86)90370-4

Cited by 27 publications

(18 citation statements)

References 8 publications

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“…All mussels were collected intertidally, and CI variability due to water depth was eliminated [22]. There were no noticeable differences in predators at the sampling sites.…”

Section: Discussionmentioning

confidence: 99%

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Chemical contaminants and biological indicators of mussel health during gametogenesis

Hellou

Yeats

Steller

et al. 2003

Enviro Toxic and Chemistry

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Mytilus edulis were collected intertidally from three locations in Halifax Harbor, Nova Scotia, on five occasions during spring and summer 2000. Bioindicators of health (lipid content), condition and gonad indices (CI and GI), and sex ratio, as well as vitellins, were compared with the bioaccumulation of polycyclic aromatic compounds (PACs) including polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), coprostanol, and metals. Twice as many male as female mussels were collected from a downtown site (M8) close to numerous raw sewage effluents and a naval dockyard. Males from M8 had a high lipid content, and females had a delayed production of vitellins. These mussels also displayed the highest levels of PACs, coprostanol, Ag, and Sn. Coprostanol and silver are sewage markers in sediments, and their presence in mussels confirms exposure to sewage effluents. Female mussels were more abundant in an area outside the industrialized part of the harbor that had higher marine traffic (M14); displayed higher levels of vitellins in gonads; had similar time trends for CI and GI; and had some similar metals compared with mussels from M8. The lowest variability in biomarkers was observed at a site in a mostly residential arm of the harbor (M12), which was expected to be more pristine based on an earlier investigation. Compared to mussels in M14, the mussels of M12 had the lowest condition indices and PCB concentrations and low but similar levels of lipids, PACs, and coprostanol. They also displayed the highest concentrations of Cd, Cu, Pb, and Hg, and females had the highest gonad indices early in the season.

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“…All mussels were collected intertidally, and CI variability due to water depth was eliminated [22]. There were no noticeable differences in predators at the sampling sites.…”

Section: Discussionmentioning

confidence: 99%

“…There were no noticeable differences in predators at the sampling sites. All mussels were collected intertidally, and CI variability due to water depth was eliminated [22]. Therefore, change would be associated with exposure at the location of interest.…”

Section: Discussionmentioning

confidence: 99%

Chemical contaminants and biological indicators of mussel health during gametogenesis

Hellou

Yeats

Steller

et al. 2003

Enviro Toxic and Chemistry

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“…Length–weight relationship is an important factor in the comparison of growth and production in aquatic organisms. Allometric length–weight relationships in Mytilus edulis (Seed 1968, 1973; Brown, Seed & O'Connor 1976; Aldrich & Crowley 1986; Barkati & Choudhry 1988; Alunno‐Bruscia, Bourget & Fréchette 2001), M. californianus (Coe & Fox 1942; Fox & Coe 1943), M. galloprovicialis (Hosomi 1985), M. smaragdinus (Chonchuenchob, Chalayondeja & Mutarasint 1980), M. viridis (Choo & Speiser 1979), Perna canaliculus (Hickman 1979) and P. viridis (Cheong & Chen 1980; Lee, 1986; Vakily et al 1988; Al‐Barwani, Arshad, Amin, Japar, Siraj & Yap 2007) have been reported from various parts of the world. In India, a few studies on length–weight relationships have been undertaken on P. viridis inhabiting Vishakapatnam (Rao, Kumari & Dwevedi 1975), Madras (Shafee 1976), Goa (Qasim, Parulekar, Harkantra, Ansari & Nair 1977; Parulekar, Dalal, Ansari & Harkantra 1982) and Kakinada (Narasimham 1981) waters.…”

Section: Introductionmentioning

confidence: 99%

Allometry and condition index in green musselPerna viridis(L.) from St Mary's Island off Malpe, near Udupi, India

Hemachandra¹,

Thippeswamy

2008

Aquaculture Research

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The morphometry, length–weight and condition index of green mussel P. viridis (L.) from St Mary's Island, off Malpe, near Udupi, were examined from December 2004 to December 2005. The calculated regression equations between length and breadth and length and width for the entire study period were L=0.5071+ 0.3921B and L=0.0179 + 0.3225W respectively. The monthly b values of length–breadth and length–width relationships varied from 0.3636 (March 2005) to 0.4374 (December 2004) and from 0.3022 (December 2005) to 0.3466 (August 2005) respectively. The data on length–total weight (W=0.0986L2.9495), length–wet tissue weight (W=0.031L2.7173), length–dry weight (W=0.005L2.9337) and length–shell weight (W=0.0351L3.061) showed a nonlinear pattern. The coefficient of allometry (b) values ranged from 2.7949 (April 2005) to 3.0999 (September 2005) for length–total weight relationship and from 1.5203 (August 2005) to 3.328 (March 2005) for length–dry weight relationship. The monthly mean values of the condition index varied from 5.17 (December 2004) to 7.76 (November 2005). The variation in condition index followed the breeding period and seasons. The maximum condition index (22–24) was recoded in May 2005. Based on the data on condition, it is suggested that the ideal period for commercial exploitation of Perna viridis from the Island is from March to August, when the meat yield is the highest. The hierarchical cluster analysis using complete linkage showed three major groups of biological parameters of mussels. The PCA showed a total of five components, which together accounted for 89.31% of total variance. The first component accounted for 44.08% of variance, followed by second component for 18.02% and the third component for 11.66% of variance. The remaining fourth and fifth components together accounted for 15.55% of variance.

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“…33 &Pilkington 1995). Relatively few studies have compared the CI of bivalves from different tidal levels but for M.edulis from Europe (Baird & Drinnan 1957;Baird 1966;Aldrich & Crowley 1986) and in the New Zealand cockle, Austrovenus stutchburyi, low-shore individuals consistently have higher values than those from mid tide levels (Dobbinson et al 1989). There are no comparative values for any Perna spp.…”

Section: Introductionmentioning

confidence: 99%

Shore‐level induced variations in condition and feeding of the musselPerna canaliculusfrom the east coast of the South Island, New Zealand

Marsden

Weatherhead

1999

New Zealand Journal of Marine and Freshwater Research

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Mussels (Perna canaliculus) (Gmelin, 1791) collected from mid and low tide rocky platforms along the east coast of the South Island of New Zealand differed in dry weight condition index between shore levels. Mussel condition was c. 15% lower at mid tide level than the low tide level and there was greater variation between shore level than between sites. Feeding experiments were conducted at 15°C with mussels collected from mid and low tide levels using Isochrysis galbana as the food. Clearance rate depended upon body size, shore level, and season. During summer clearance rates of mid and low tide mussels were similar. However in winter, increased filtration rates were recorded in mussels from the mid tide level compared with those from the low tide. In addition, for mussels from both shore levels, winter rates were higher than those recorded in the summer. Nitrogen excretion by mussels also showed seasonal and shore level differences. High values for ammonia excretion of mussels collected from the mid tide during winter suggests they utilise metabolic reserves to maintain their basal metabolism. Although our results suggest that increased filtration rates for mid tide mussels might compensate for reduced feeding time, in the winter, larger mussels from the mid tide level would Received 30 October 1998; accepted 29 April 1999 be unlikely to obtain sufficient energy for maintenance or growth. Large mussels were infrequent in the mid tide population, where the mean length was 62.5 mm compared with 75.1 mm from the low tide. It is concluded that nutrient limitation, as a result of reduced feeding time can act as a significant stress factor limiting the growth potential of mussels settled at the mid tide level. M98077

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Condition and variability in Mytilus edulis (L.) from different habitats in Ireland

Cited by 27 publications

References 8 publications

Chemical contaminants and biological indicators of mussel health during gametogenesis

Chemical contaminants and biological indicators of mussel health during gametogenesis

Allometry and condition index in green musselPerna viridis(L.) from St Mary's Island off Malpe, near Udupi, India

Shore‐level induced variations in condition and feeding of the musselPerna canaliculusfrom the east coast of the South Island, New Zealand

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