A study of the plasma lipoproteins and the tissue lipids of the migrating lamprey,<i>Mordacia mordax</i>

Fellows, Florence C. I.; McLean, R.M.

doi:10.1007/bf02534661

Cited by 16 publications

(4 citation statements)

References 32 publications

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“…Alterations in fatty acid compositions of plasma, whole body and of selected tissues (liver, gonad, muscle) during various periods of the life cycles of several lamprey species, including pre-metamorphic (larvae), post-metamorphic (downstream migrants), pre-breeding (upstream migrants) and breeding period (adult), have been reported previously (Fellows and Mclean, 1982;Bird and Potter, 1983;Whyte et al, 1993;Bird et al, 1993;LeBlanc et al, 1995). This study is the first report of altera- Table 1 and Table 2.…”

Section: Discussionmentioning

confidence: 73%

“…This study is the first to report fatty acid composition in the lamprey kidney and intestine. Alteration patterns in fatty acid composition of the liver, gonad and muscle have been reported in several species of lamprey (Fellows and Mclean, 1982;Bird and Potter, 1983;Bird et al, 1993;Whyte et al, 1993).…”

Section: Discussionmentioning

confidence: 96%

“…Changes in fatty acid compositions from the plasma, whole body, andyor tissues (e.g. liver, gonad, muscle) have been reported in several species of lampreys, including one non-parasitic lamprey, L. planeri (Bird et al, 1993), two anadromous parasitic southern-hemisphere lampreys, M. mordax (Fellows and Mclean, 1982) and G. australis (Bird and Potter, 1983), two anadromous parasitic northern-hemisphere lampreys, L. tridentata (Whyte et al, 1993) and L. fluviatilis (Bird et al, 1993), and one landlocked parasitic northern-hemisphere sea lamprey, P. marinus (LeBlanc et al, 1995). These investigations, however, focused only on pre-metamorphic larvae, downstream migrants, upstream migrants, and adult lampreys.…”

Section: Introductionmentioning

confidence: 99%

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Differences in the fatty acid composition of larvae and metamorphosing sea lampreys, Petromyzon marinus

Kao

Youson

Vick

et al. 2002

Comparative Biochemistry and Physiology Part B: Biochemistry an

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This study was designed to evaluate biochemical changes in the fatty acid (FA) compositions of selected lipid depot (kidney and liver) and absorption (intestine) organs in larvae and metamorphosing sea lamprey, Petromyzon marinus. Palmitic or stearic acids were generally the predominant saturated fatty acids (SFA) before and during metamorphosis, but the greatest proportion of myristic acid occurred in renal triacylglycerol (TG). Monoenes, dienes, and polyenes consist mainly of 16:1, 18:1, and 20:1, 18:2 and 20:2v6, and 18:4v3, respectively. Alterations in these predominant fatty acids occurred during lamprey metamorphosis, but depended on tissue, lipid class, and developmental status. During metamorphosis, kidney TG and phospholipid (PL) classes tended to mobilize SFA and enhance the fatty acid unsaturation, as indicated by increased unsaturatedysaturated ratio, unsaturation index (USI), and total mean chain length (MCL). There was a tendency to increase saturation in the fatty acids of liver TG and PL classes and intestine TG, FA and monoacylglycerol (MG) classes, but to increase unsaturation in the fatty acids of liver cholesteryl ester (CE), FA and MG classes and intestine PL and CE classes from larva or stage 3 to stage 7. Increased polyunsaturated fatty acids in kidney TG and PL from larvae to stage 5 transformers and intestine PL and CE from stage 3 to stage 7 transformers may reflect an osmoregulatory pre-adaptation. The presence of branched-chain SFA (BCSFA) and the odd number of fatty acids (ONFA) indicated a significant role of detritivores in the benthic larvae. Decreased abundance of BCSFA, ONFA, and 18:2 dienes occurred in the transformed intestine TG as non-trophic metamorphosis proceeded. These data suggest that sea lamprey metamorphosis may proceed in a habitat, dietary, osmoregulatory, energetic, and developmental pre-adaptation of fatty acid composition from benthic filter-feeding larvae to pelagic parasitic juveniles. ᮊ

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Section: Discussionmentioning

confidence: 73%

Section: Discussionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

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Differences in the fatty acid composition of larvae and metamorphosing sea lampreys, Petromyzon marinus

Kao

Youson

Vick

et al. 2002

Comparative Biochemistry and Physiology Part B: Biochemistry an

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show abstract

“…Changes in triglyceride composition have been reported on several parasitic sea lamprey species such as Mordacia mordax [36], Geotria australis [37] and landlocked parasitic sea lamprey Petromzons marinus [38]. Therefore, composition of the triglycerides in sea lamprey depends on the migratory state and the specific organ of the animal.…”

Section: Discussionmentioning

confidence: 99%

Chemical Characterization of Lipophilic Constituents in the Skin of Migratory Adult Sea Lamprey from the Great Lakes Region

2016

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The sea lamprey (Petromzons marinus) is an invasive ectoparasite of large-bodied fishes that adversely affects the fishing industry and ecology of the Laurentian Great Lakes. Lipid content in the whole sea lamprey and muscles, liver and kidney of metamorphosing larval stages has been reported. Similarly, the fatty acid profile of the rope tissues of sexually-mature male sea lampreys has also been reported. The average body weight of a sub-adult migratory sea lamprey is 250 g, which includes 14.4% skin (36 g). Our preliminary extraction data of an adult sea lamprey skin revealed that it contained approximately 8.5% of lipophilic compounds. Lamprey skin is home to a naturally aversive compound (an alarm cue) that is being developed into a repellent for use in pest management. As part of an ongoing investigation to identify the chemical structure of the sea lamprey alarm cue, we extracted the skin with water and methanol, respectively. The methanolic extract (1.55%) contained exclusively lipophilic compounds and did not include the alarm cue. We chemically characterized all compounds present in the methanolic extract as cholesterol esters (CE), tri- and di-glycerides (TG and DG), cholesterol, free fatty acids (FFA) and minor amounts of plasticizers. The free fatty acids fraction was composed of saturated (41.8%), monounsaturated (40.7%) and polyunsaturated (17.4%) fatty acids, respectively. The plasticizers characterized were phthalate and benzoate and found to be 0.95 mg and 2.54 mg, respectively, per adult sea lamprey skin. This is the first report of the chemical characterization of all the lipophilic constituents in the skin of sub-adult migratory sea lamprey. The CEs isolated and characterized from sea lamprey skin are also for the first time.

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The Biology of Australian Lampreys

Potter

Hilliard

Neira

1986

Limnology in Australia

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A study of the plasma lipoproteins and the tissue lipids of the migrating lamprey,Mordacia mordax

Cited by 16 publications

References 32 publications

Differences in the fatty acid composition of larvae and metamorphosing sea lampreys, Petromyzon marinus

Differences in the fatty acid composition of larvae and metamorphosing sea lampreys, Petromyzon marinus

Chemical Characterization of Lipophilic Constituents in the Skin of Migratory Adult Sea Lamprey from the Great Lakes Region

The Biology of Australian Lampreys

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