Influence of the gametogenic cycle on the biochemical composition of the ovary of the great scallop

Pazos, A.; Román, Guillermo; Acosta, Carmen; Abad, María J. F.; Sánchez, José L.

doi:10.1007/bf00117382

Cited by 24 publications

(9 citation statements)

References 32 publications

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“…The relative percentage of 20:5 n-3 and 22:6 n-3 was almost constant in the female gonad of individuals fed lipid-and carbohydrate-supplemented diets, but it decreased significantly in scallops fed an algal diet. This is in agreement with the findings of Pazos et al (1996) and Trider & Castell (1980) who reported that 20:5 n-3 and 22:6 n-3 content were reduced in the female gonad after spawning; nevertheless, in the present study spawning at 58 days was not observed. The poorest response to spawning induction was for individuals conditioned with the Micr.…”

Section: Discussionsupporting

confidence: 94%

Effect of three conditioning diets on the fatty acid composition of gonads and muscle ofArgopecten purpuratus

Palma-Fleming¹,

Navarro

Peña

et al. 2002

New Zealand Journal of Marine and Freshwater Research

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Mature specimens of Argopecten purpuratus (Lamarck, 1819), obtained from the Culture Center of Tongoy Bay, northern Chile were conditioned at 20°C and fed three different diets (mixture of pure microalgae, microalgae supplemented with a lipid emulsion, and microalgae supplemented with carbohydrates). Fatty acids were analysed at 0, 18, 38, 58, and 72 days of gonad conditioning. Both muscle and gonads showed a significant decrease in the relative distribution (weight % of total fatty acids) of saturated, monounsaturated, and n-6 polyunsaturated fatty acids (mg/g dry weight). Generally, an increase of the n-3 polyunsaturated group was observed for gonads until Day 58, thereafter a decrease was observed, probably as a result of environmental M01013;

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Section: Discussionsupporting

confidence: 94%

Effect of three conditioning diets on the fatty acid composition of gonads and muscle ofArgopecten purpuratus

Palma-Fleming¹,

Navarro

Peña

et al. 2002

New Zealand Journal of Marine and Freshwater Research

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“…These cells develop from oogonia (Cowden), which increase in volume by accumulating reserves as they mature (Pazos et al, 1996). According to Sotil, the basophilic character and the presence of numerous vacuoles in previtellogenic oocytes is due to the presence of acid mucopolysaccharides together with lipid-containing vesicles that increase in number and are dispersed, evidencing intracellular transport activity and substance accumulation.…”

Section: Discussionmentioning

confidence: 99%

Histological Description of Oogenesis in Chiton virgulatus (Mollusca: Polyplacophora)

et al. 2014

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SUMMARY: This paper describes the oogenesis of Chiton virgulatus, based on histological observations under transmission and scanning electron microscopy. Three oocyte types were identified: i) previtellogenic oocytes with a mean diameter of 50±20.5 µm, surrounded by elongated follicular cells of approximately 5 µm, ii) immature vitellogenic oocytes with a mean diameter of 113±15.3 µm and small cytoplasmic projections denoting the onset of the oocyte hull development; adjacent to each projection are pores approximately 0.7 µm in diameter, and iii) mature vitellogenic oocytes with a mean diameter of 146±24.8 µm; the oocyte cytoplasmic projections grow and its apical zone becomes trident-shaped; follicular cells adopt a bulbous shape due to the growth of the elongation and can reach up to 20 µm in length. The morphology and ultrastructure of the projections of the mature vitellogenic oocyte, as well as the size of pores at their base, are specific to C. virgulatus; therefore, these features could be used in taxonomic or fertilization studies.

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“…Current models of the costs of reproduction are limited to a single octopus and squid species (Wells & Clarke, 1996). Robert, Trut & Laborde, 1993;Pazos et al, 1996;Galap, Leboulenger & Grillot, 1997). Fish store lipid in the somatic tissues and the liver, which is then transported to the ovary for use during egg production (e.g.…”

Section: Introductionmentioning

confidence: 99%

Limited use of stored energy reserves for reproduction by the tropical loliginid squid Photololigo sp.

Moltschaniwskyj

Semmens

2000

Journal of Zoology

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This study sought to determine if the tropical loliginid squid Photololigo sp. stores energy in the form of lipid, carbohydrate or protein for reproductive investment. Individuals were examined for changes in morphometry, mantle muscle structure and concentrations of water, lipid, carbohydrate and protein in muscle tissue and the digestive gland, associated with the stage of reproductive maturation. Muscle mass was affected by reproductive maturation in females. Mature individuals were lighter for their length compared with females in the early stages of maturation. Concentrations of lipid and carbohydrate in the muscle tissue were very low, and female Photololigo sp. showed equivocal evidence of declining lipid and carbohydrate levels with egg production. There was no evidence of dramatic changes in protein concentration in the mantle muscle with reproductive maturation. Male Photololigo sp. showed a change in the digestive gland with maturation, with water content increasing and protein concentrations decreasing.The digestive gland of both male and female Photololigo sp. increased in size and contained less water with growth. There was little evidence that the storage and transfer of energy for reproduction occurred in Photololigo sp. Instead, it is probable that energy for reproduction is predominantly sourced directly from consumed food.

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Influence of the gametogenic cycle on the biochemical composition of the ovary of the great scallop

Cited by 24 publications

References 32 publications

Effect of three conditioning diets on the fatty acid composition of gonads and muscle ofArgopecten purpuratus

Effect of three conditioning diets on the fatty acid composition of gonads and muscle ofArgopecten purpuratus

Histological Description of Oogenesis in Chiton virgulatus (Mollusca: Polyplacophora)

Limited use of stored energy reserves for reproduction by the tropical loliginid squid Photololigo sp.

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