Fatty acid composition of polar lipid classes during larval development of scallop Pecten maximus (L.)

Soudant, Philippe; Marty, Yanic; Moal, Jeanne; Masski, Hicham; Samain, Jean François

doi:10.1016/s1095-6433(98)10130-7

Cited by 65 publications

(50 citation statements)

References 21 publications

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“…Selective incorporation or elimination of certain fatty acids likely occurs in membrane lipids in bivalves, as has been previously suggested in other studies (e.g. Delaunay et al 1993, Soudant et al 1998, Pernet et al 2005. This suggests that the increase in long-chain PUFA in clams that occurs during a temperature decrease is an active regulatory mechanism that remains somewhat independent of the food.…”

Section: Discussionsupporting

confidence: 69%

Remodeling of membrane lipids in gills of adult hard clam Mercenaria mercenaria during declining temperature

Parent¹,

Tremblay²,

Sévigny³

et al. 2008

Aquat. Biol.

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In a previous study, a major remodeling of lipids, consistent with the theory of homeoviscous adaptation, was observed in the juvenile hard clam Mercenaria mercenaria during a temperature reduction from 24 to -1°C. In addition, the lipid remodeling varied between genetically distinct lines of hard clams. The present study examined whether adult hard clams originating from different locations and a selectively bred variety show differences related to their genetic characteristics in the remodeling of lipids that normally occur during decreasing temperatures. Wild hard clams from 4 locations in Atlantic Canada and the selectively bred M. mercenaria var. notata were held at an aquaculture growout site located at the northern distribution limit of the species in the Gulf of St. Lawrence from August to December 2006. Gills were sampled monthly for lipid analyses. Hard clams from the 5 groups showed an increase in the unsaturation index, mainly attributable to 22:6n-3 and 20:5n-3 as temperature decreased during the fall, followed by an increase in the phospholipid to sterol ratio in December. Although hard clams from the wild showed a lower unsaturation index than the selectively bred clams, there was no effect of location on the lipid remodeling. This result coincided with low genetic differentiation among hard clams from the 5 groups. Interestingly, the levels of 20:5n-3, 20:4n-6 and 22:6n-3 -3 fatty acids obtained from the diet -were generally lower in the environment compared to the levels in hard clams, thus suggesting some mechanisms for the selective incorporation of these fatty acids in hard clams.

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Section: Discussionsupporting

confidence: 69%

Remodeling of membrane lipids in gills of adult hard clam Mercenaria mercenaria during declining temperature

Parent¹,

Tremblay²,

Sévigny³

et al. 2008

Aquat. Biol.

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“…This suggests that adult A. purpuratus possess high homeostatic capabilities that minimise the effect of exogenous FA on phospholipid composition. Presumably, A. purpuratus can modulate the incorporation of FA even if the dietary supply is high, as observed for other bivalves (Pirini et al 2007;Delaporte et al 2003;Soudant et al 1998). Even though we have not identified the exact mechanism(s) and factor(s) affecting mitochondrial capacities, differences between the phytoplankton in the content of other compounds such as vitamins or antioxidants could have led the functional capacities of mitochondria to differ.…”

Section: Muscle Female Gonad Male Gonad Fatty Acidsmentioning

confidence: 79%

Diet and performance in the scallop,Argopecten purpuratus: force production during escape responses and mitochondrial oxidative capacities

Guderley

Brokordt

Cortés

et al. 2011

Aquat. Living Resour.

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-We examined whether escape response performance and mitochondrial capacities could reveal differences created by feeding scallops, Argopecten purpuratus, mono-specific algal diets composed of either Chaetoceros calcitrans or Isochrysis galbana (variety T. iso) hereafter T. iso. Before and after feeding scallops with these diets, we assessed force production in vivo to evaluate escape response performance (initial and repeat). We measured oxidative capacities of mitochondria isolated from the adductor muscle and from the male and female portions of the gonad. Initial escape response performance was reduced more by the C. calcitrans diet than by the T. iso diet. Repeat escape responses, which require aerobic recuperation, were reduced by both treatments. The oxidative capacity of mitochondria isolated from muscle and female gonad was markedly lower in scallops fed C. calcitrans than in those fed T. iso. Flux through complex I-IV and through complex IV was also lower in mitochondria from muscle of scallops fed C. calcitrans than in those fed T. iso. Muscle aerobic capacity, assessed by citrate synthase activity, was lower in scallops fed C. calcitrans than in those fed T. iso. Despite the marked differences in fatty acid (FA) composition of the algal diets, the FA composition of mitochondrial phospholipids differed little between scallops fed C. calcitrans and those fed T. iso. Both escape response behaviour and mitochondrial capacities changed with feeding mono-specific diets. The simplicity of measurements of scallop escape responses suggests this as a practical means of evaluating the status of scallops for the two monoalgal diets tested.

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“…The ration used by Talmage and Gobler was approximately half the ration than used in the present experiments and could also account for the decreased growth rate they observed in later development, a high CO2 response that was not apparent in the results of any of my experiments. Furthermore, scallop larvae rely on the energy reserves they have accumulated during their planktotrophic phase while they undergo metamorphosis and are unable to collect food particles for a period of time (Whyte et al 1992;Soudant et al 1998;Lu and Blake 1999;. The lower lipid indices that observed in bay scallops exposed to high CO2 might help explain the sudden mortality occurring around the age of metamorphosis, mortality that was higher for scallops exposed to high CO2 than those exposed to ambient or pre--industrial CO2 levels.…”

Section: Impacts Of High Co2 On Shell Growth and Sizementioning

confidence: 99%

Growth and development of larval bay scallops (Argopecten irradians) in response to early exposure to high CO2

White¹

2013

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Coastal and estuarine environments experience large variability and rapid shifts in pCO2 levels. Elevated pCO2, or ocean acidification, often negatively affects early life stages of calcifying marine invertebrates, including bivalves, but it is unclear which developmental stage is most sensitive. I hypothesized that initial calcification is a critical stage during which high pCO2 exposure has severe effects on larval growth and development of bay scallop (Argopecten irradians). Using five experiments varying the timing of exposure of embryonic and larval bay scallops to high CO2, this thesis identifies two distinct stages of development during which exposure to high CO2/low pH causes different effects on bay scallop larvae. I show that any exposure to high CO2 consistently reduces survival of bay scallop larvae. I also show that high CO2 exposure during initial calcification (12--24 h post--fertilization) results in significantly smaller shells, relative to ambient conditions, and this size decrease persists through the first week of development. High CO2 exposure at 2--12 h post--fertilization (pre--calcification), does not impact shell size, suggesting that the CO2 impact on size is a consequence of water chemistry during calcification. However, high CO2 exposure prior to shell formation (2--12 h post--fertilization) causes a high incidence of larval shell deformity, regardless of CO2 conditions during initial calcification. This impact does not occur in response to high CO2 exposure after the 2--12 h period. The observations of two critical stages in early development has implications for both field and hatchery populations. If field populations were able to time their spawning to occur during the night, larvae would undergo initial calcification during the daytime, when CO2 conditions are more favorable, resulting in larger veliger larvae. Hatcheries could invest minimal resources to monitor and modify water chemistry only during the first day of development to ensure larva are exposed to favorable conditions during that critical period.

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Fatty acid composition of polar lipid classes during larval development of scallop Pecten maximus (L.)

Cited by 65 publications

References 21 publications

Remodeling of membrane lipids in gills of adult hard clam Mercenaria mercenaria during declining temperature

Remodeling of membrane lipids in gills of adult hard clam Mercenaria mercenaria during declining temperature

Diet and performance in the scallop,Argopecten purpuratus: force production during escape responses and mitochondrial oxidative capacities

Growth and development of larval bay scallops (Argopecten irradians) in response to early exposure to high CO2

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