Oxygen Consumption of Lampreys, with Special Reference to Metamorphosis and Phylogenetic Position

Wj, Leach

doi:10.1086/physzool.19.4.30151926

Cited by 30 publications

(10 citation statements)

References 8 publications

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“…In this month, the peak of the length-frequency curve representing the metamorphosing individuals corresponds closely to that of the largest ammocoete group and a similar situation is seen in September. It would thus appear that during the fifth and last year of larval life, the ammocoetes in this population undergo what has been referred to as an 'arrested growth phase' (Leach, 1946;Hardisty & Potter, 1971b).…”

Section: Duration Of Larval Life and Growth Ratessupporting

confidence: 68%

Changes in the proximate body composition of the landlocked sea lamprey Petromyzon marinus (L.) during larval life and metamorphosis

Lowe

Beamish

Potter

1973

Journal of Fish Biology

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Estimates were made of the growth rates and proximate body composition of larval and metamorphosing P. marinus (L.) collected at various times of the year from Shelter Valley Creek, Lake Ontario. Analysis of length‐frequency data indicates that the average duration of larval life was 6 years, with metamorphosis occurring predominantly in the length range above 13 cm. Increases in length were almost entirely restricted to the warmest months and did not take place during the final year of larval life. Three categories were thus recognized for the proximate analysis: ammocoetes <13 cm, ammocoetes > 13 cm and metamorphosing individuals. In ammocoetes <13 cm, seasonal differences were observed in the regression coefficients in the logarithmic relationships between wet weight and length and between each of water, lipid and ash and the wet weight. No such difference was found for the regressions between protein and wet weight. For a fixed length (9 cm), the wet weight varied only slightly during the year, although a small peak was seen in May. When considered on the basis of fixed weight (1 g), the relative amount of lipid deposited was greatest in May/July, coincident with a high diatom density. The water content followed an inverse pattern to that of lipid, while the protein and ash contents showed little seasonal variation and exhibited values lower than those normally found in teleosts. Throughout the last year of larval life, the animal stored a greater proportion of lipid, presumably to facilitate the energy demands of metamorphosis during which this food store underwent a marked reduction.

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Section: Duration Of Larval Life and Growth Ratessupporting

confidence: 68%

Changes in the proximate body composition of the landlocked sea lamprey Petromyzon marinus (L.) during larval life and metamorphosis

Lowe

Beamish

Potter

1973

Journal of Fish Biology

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“…greeleyi during the final year has been observed also for other lampreys and identified as a period of rest or arrested growth (Leach, 1946;Lowe et al, 1973). The slight increase in length ofI.…”

Section: Discussionmentioning

confidence: 59%

Growth of the Mountain Brook Lamprey Ichthyomyzon greeleyi Hubbs and Trautman

Beamish¹,

Austin²

1985

Copeia

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“…It is probable that the tadpole's temperature is the same as that of the surrounding water and that the metabolic rate at a given stage of development is directly determined by its temperature. This may be true of cold-blooded aquatic vertebrates in general, since the balance of evidence favours the view that the thyroid has no influence on the 02 consumption of fish (Lynn & Wachowski, 1951) or lampreys (Leach, 1946).…”

Section: Discussionmentioning

confidence: 99%

Oxygen consumption of tadpoles during metamorphosis

Fletcher¹,

Myant²

1959

The Journal of Physiology

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It is well known that thyroid hormone is necessary for metamorphosis in tadpoles. Since this substance causes an increase in the metabolic rate in mammals, it has often been suggested that the immediate cause of metamorphosis in amphibia is an increase in tissue metabolism. Huxley (1922), for instance, has suggested that the thyroid causes an increase in the rate of metabolism of all the tissues and that in these conditions certain organs develop whereas others are caused to atrophy.Several workers have tried to determine whether the rate of metabolism changes during metamorphosis, but their results have been contradictory. Abelin & Scheinfinkel (1923) found that C02 output usually fell during metamorphosis of Rana esculenta. Helif (1926)

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Oxygen Consumption of Lampreys, with Special Reference to Metamorphosis and Phylogenetic Position

Cited by 30 publications

References 8 publications

Changes in the proximate body composition of the landlocked sea lamprey Petromyzon marinus (L.) during larval life and metamorphosis

Changes in the proximate body composition of the landlocked sea lamprey Petromyzon marinus (L.) during larval life and metamorphosis

Growth of the Mountain Brook Lamprey Ichthyomyzon greeleyi Hubbs and Trautman

Oxygen consumption of tadpoles during metamorphosis

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