Fuel reserves of molluscan muscle

Suryanarayanan, H.; Alexander, K M

doi:10.1016/0300-9629(71)90146-0

Cited by 19 publications

(6 citation statements)

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“…Cephalopods have very little carbohydrate stores (28,39), and on the basis of the triglyceride decrease in the digestive gland in food-deprived cephalopods (this study; Refs. 6, 21, 33), the latter likely contributes to the remaining ϳ50% of aerobic energy metabolism.…”

Section: Discussionmentioning

confidence: 99%

Metabolic rate and rates of protein turnover in food-deprived cuttlefish,Sepia officinalis(Linnaeus 1758)

Lamarre

MacCormack

Sykes

et al. 2016

American Journal of Physiology-Regulatory, Integrative and Comp

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To determine the metabolic response to food deprivation, cuttlefish (Sepia officinalis) juveniles were either fed, fasted (3 to 5 days food deprivation), or starved (12 days food deprivation). Fasting resulted in a decrease in triglyceride levels in the digestive gland, and after 12 days, these lipid reserves were essentially depleted. Oxygen consumption was decreased to 53% and NH4 excretion to 36% of the fed group following 3-5 days of food deprivation. Oxygen consumption remained low in the starved group, but NH4 excretion returned to the level recorded for fed animals during starvation. The fractional rate of protein synthesis of fasting animals decreased to 25% in both mantle and gill compared with fed animals and remained low in the mantle with the onset of starvation. In gill, however, protein synthesis rate increased to a level that was 45% of the fed group during starvation. In mantle, starvation led to an increase in cathepsin A-, B-, H-, and L-like enzyme activity and a 2.3-fold increase in polyubiquitin mRNA that suggested an increase in ubiquitin-proteasome activity. In gill, there was a transient increase in the polyubiquitin transcript levels in the transition from fed through fasted to the starved state and cathepsin A-, B-, H-, and L-like activity was lower in starved compared with fed animals. The response in gill appears more complex, as they better maintain rates of protein synthesis and show no evidence of enhanced protein breakdown through recognized catabolic processes.

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Section: Discussionmentioning

confidence: 99%

Metabolic rate and rates of protein turnover in food-deprived cuttlefish,Sepia officinalis(Linnaeus 1758)

Lamarre

MacCormack

Sykes

et al. 2016

American Journal of Physiology-Regulatory, Integrative and Comp

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“…Los glúcidos del músculo (29%) de Octopus mimus, contribuyeron en gran parte al sostenimiento de la reproducción, contrastando con la poca importancia y bajo porcentaje (0,56%) que tiene en Sepia officinalis (Storey & Storey, 1983). Los lípidos de la musculatura de Octopus mimus fueron los de menor relevancia, coincidiendo con los bajos niveles de lípidos encontrados en la musculatura de otros octópodos (Suryanarayanan & Alexander, 1971;Fujii, 1960). Durante el período posdesove, en Octopus mimus el contenido porcentual de las proteínas aumentó, aspecto que también ha sido mencionado en otros grupos de animales durante el ayuno: Balanus balanoides (Barnes et al, 1963); Artemia salina (Katavic et al, 1985); Brachionus plicatilis (Frolov & Pankov, 1992).…”

Section: Discussionunclassified

VARIACIONES BIOQUÍMICAS E HISTÓLOGICAS ASOCIADAS AL EVENTO REPRODUCTIVO DE LA HEMBRA DE Octopus mimus (MOLLUSCA: CEPHALOPODA)

2004

Int. J. Morphol.

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“…Compared with other molluscs glycogen reserves in cephalopod muscle tissue are very low (Suryanarayanan and Alexander 1971). Carbohydrate concentration, the first source of stored energy, is affected by water temperature and ration level in young cuttlefish, suggesting some capacity to store energy in this form (Moltschaniwskyj and Martínez 1998).…”

Section: Proximal Composition and Biochemical Measuresmentioning

confidence: 99%

Understanding the process of growth in cephalopods

Moltschaniwskyj

2004

Mar. Freshwater Res.

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Many cephalopod species grow throughout their lifetime. Critically, this means that they lack an asymptotic phase of growth, when, for a substantial part of the lifetime, growth slows and body size increases minimally. Understanding the form of the growth curve requires an understanding of the growth processes operating at several biological levels including the relative growth of organs, muscle fibre production and growth, and at the level of proximal composition and protein synthesis. There are key differences in growth processes between fish and cephalopods; cephalopods have a sac-like body form that provides greater surface area for respiration, continuous production of new muscle fibres that ensures a supply of somatic material for growth, and high retention of synthesised protein. These characteristics provide process-orientated explanations for non-asymptotic growth in cephalopods. However, differences found in growth curves of laboratory-reared animals (two-phase growth curve) and of wild animals (single growth curve) suggests that future work will be needed to resolve this paradox. We need to determine the generality of growth processes observed to date, and how biotic and abiotic factors modify these processes during the lifetime of the animals.

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Fuel reserves of molluscan muscle

Cited by 19 publications

References 1 publication

Metabolic rate and rates of protein turnover in food-deprived cuttlefish,Sepia officinalis(Linnaeus 1758)

Metabolic rate and rates of protein turnover in food-deprived cuttlefish,Sepia officinalis(Linnaeus 1758)

VARIACIONES BIOQUÍMICAS E HISTÓLOGICAS ASOCIADAS AL EVENTO REPRODUCTIVO DE LA HEMBRA DE Octopus mimus (MOLLUSCA: CEPHALOPODA)

Understanding the process of growth in cephalopods

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