Ascorbic acid and the reproductive cycle of ovaries in cod (Gadus morrhua)

Ascorbic acid in the gonads of North Sea dab (Limanda limanda) during the reproductive cycle

“…Except during the late postspawning period, the ascorbate concentration in females was significantly higher (80-400 µg⋅g fw -1 ) than in males (30-160 µg⋅g fw -1 ) on corresponding sampling dates. The concentrations determined here in dab ovaries correspond to ascorbate concentrations in another marine fish species, Atlantic cod (Gadus morhua) (Sandnes and Braekkan 1981). Similar sexual differences but lower ascorbate concentrations were determined in crucian carp (Carassius carassius) by Seymour (1981) and in Arctic char (high-mountain charr) (Salvelinus alpinus) by Dabrowski (1991); both are freshwater species.…”

Ascorbic acid in the gonads of North Sea dab (Limanda limanda) during the reproductive cycle

“…Except during the late postspawning period, the ascorbate concentration in females was significantly higher (80-400 µg⋅g fw -1 ) than in males (30-160 µg⋅g fw -1 ) on corresponding sampling dates. The concentrations determined here in dab ovaries correspond to ascorbate concentrations in another marine fish species, Atlantic cod (Gadus morhua) (Sandnes and Braekkan 1981). Similar sexual differences but lower ascorbate concentrations were determined in crucian carp (Carassius carassius) by Seymour (1981) and in Arctic char (high-mountain charr) (Salvelinus alpinus) by Dabrowski (1991); both are freshwater species.…”

Reproductive Success of Female Rainbow Trout (Oncorhynchus Mykiss) in Response to Graded Dietary Ascorbyl Monophosphate Levels1

“…This change in saturation levels may be a result of changed kinetics due to morphological changes in the ovary during development. A similar pattern was described by Sandnes and Brxakkan [8] in the ovaries of cod. Waagbo et al [4] reported a drop in ascorbic acid levels in the ovaries of trout from 487 to 260 pzg/g from October to November.…”

Ascorbic acid status in high-mountain charr, Salvelinus alpinus, in relation to the reproductive cycle

“…Seymour (1981) showed that ascorbate increased during the final stages of ovary maturation in cyprinid fish, whereas Sandnes & Braekkan (1981) reported a fall in the cod ovary ascorbate concentration from 400 to 50 pg g-' as the cod GSI increased from 1 to 20%. This is nevertheless an increase in absolute amounts.…”

“…There are several reports on the levels of ascorbate in fish tissues with respect to season, sex and species (Agrawal & Mahajan 1980, Seymour 1981, Sandnes & Braekkan 1981, but due to the un-215 certainties in analytical methods employed, the possibility of making direct comparisons is limited. Seymour (1981) showed that ascorbate increased during the final stages of ovary maturation in cyprinid fish, whereas Sandnes & Braekkan (1981) reported a fall in the cod ovary ascorbate concentration from 400 to 50 pg g-' as the cod GSI increased from 1 to 20%.…”

Ascorbic acid in the gonads of North Sea dab (Limanda limanda) during the reproductive cycle

“…Except during the late postspawning period, the ascorbate concentration in females was significantly higher (80-400 µg⋅g fw -1 ) than in males (30-160 µg⋅g fw -1 ) on corresponding sampling dates. The concentrations determined here in dab ovaries correspond to ascorbate concentrations in another marine fish species, Atlantic cod (Gadus morhua) (Sandnes and Braekkan 1981). Similar sexual differences but lower ascorbate concentrations were determined in crucian carp (Carassius carassius) by Seymour (1981) and in Arctic char (high-mountain charr) (Salvelinus alpinus) by Dabrowski (1991); both are freshwater species.…”

Reproductive Success of Female Rainbow Trout (Oncorhynchus Mykiss) in Response to Graded Dietary Ascorbyl Monophosphate Levels1

“…This change in saturation levels may be a result of changed kinetics due to morphological changes in the ovary during development. A similar pattern was described by Sandnes and Brxakkan [8] in the ovaries of cod. Waagbo et al [4] reported a drop in ascorbic acid levels in the ovaries of trout from 487 to 260 pzg/g from October to November.…”

Ascorbic acid status in high-mountain charr, Salvelinus alpinus, in relation to the reproductive cycle

“…Seymour (1981) showed that ascorbate increased during the final stages of ovary maturation in cyprinid fish, whereas Sandnes & Braekkan (1981) reported a fall in the cod ovary ascorbate concentration from 400 to 50 pg g-' as the cod GSI increased from 1 to 20%. This is nevertheless an increase in absolute amounts.…”

“…There are several reports on the levels of ascorbate in fish tissues with respect to season, sex and species (Agrawal & Mahajan 1980, Seymour 1981, Sandnes & Braekkan 1981, but due to the un-215 certainties in analytical methods employed, the possibility of making direct comparisons is limited. Seymour (1981) showed that ascorbate increased during the final stages of ovary maturation in cyprinid fish, whereas Sandnes & Braekkan (1981) reported a fall in the cod ovary ascorbate concentration from 400 to 50 pg g-' as the cod GSI increased from 1 to 20%.…”

Ascorbic acid in the gonads of North Sea dab (Limanda limanda) during the reproductive cycle

“…Except during the late postspawning period, the ascorbate concentration in females was significantly higher (80-400 µg⋅g fw -1 ) than in males (30-160 µg⋅g fw -1 ) on corresponding sampling dates. The concentrations determined here in dab ovaries correspond to ascorbate concentrations in another marine fish species, Atlantic cod (Gadus morhua) (Sandnes and Braekkan 1981). Similar sexual differences but lower ascorbate concentrations were determined in crucian carp (Carassius carassius) by Seymour (1981) and in Arctic char (high-mountain charr) (Salvelinus alpinus) by Dabrowski (1991); both are freshwater species.…”

Reproductive Success of Female Rainbow Trout (Oncorhynchus Mykiss) in Response to Graded Dietary Ascorbyl Monophosphate Levels1

“…This change in saturation levels may be a result of changed kinetics due to morphological changes in the ovary during development. A similar pattern was described by Sandnes and Brxakkan [8] in the ovaries of cod. Waagbo et al [4] reported a drop in ascorbic acid levels in the ovaries of trout from 487 to 260 pzg/g from October to November.…”

Ascorbic acid status in high-mountain charr, Salvelinus alpinus, in relation to the reproductive cycle

“…Seymour (1981) showed that ascorbate increased during the final stages of ovary maturation in cyprinid fish, whereas Sandnes & Braekkan (1981) reported a fall in the cod ovary ascorbate concentration from 400 to 50 pg g-' as the cod GSI increased from 1 to 20%. This is nevertheless an increase in absolute amounts.…”

“…There are several reports on the levels of ascorbate in fish tissues with respect to season, sex and species (Agrawal & Mahajan 1980, Seymour 1981, Sandnes & Braekkan 1981, but due to the un-215 certainties in analytical methods employed, the possibility of making direct comparisons is limited. Seymour (1981) showed that ascorbate increased during the final stages of ovary maturation in cyprinid fish, whereas Sandnes & Braekkan (1981) reported a fall in the cod ovary ascorbate concentration from 400 to 50 pg g-' as the cod GSI increased from 1 to 20%.…”