Temporal dynamics of oocyte development, plasma sex steroids and somatic energy reserves during seasonal ovarian maturation in captive Murray cod Maccullochella peelii peelii.

Temporal dynamics of oocyte development, plasma sex steroids and somatic energy reserves during seasonal ovarian maturation in captive Murray cod Maccullochella peelii peelii. Research Abstract Details 

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Temporal dynamics of oocyte development, plasma sex steroids and somatic energy reserves during seasonal ovarian maturation in captive Murray cod Maccullochella peelii peelii. Abstract Text:

Dane M Newman,Paul L Jones,Brett A Ingram,Dane M Newman,Paul L Jones,Brett A Ingram,

The temporal dynamics of oocyte growth, plasma sex steroids and somatic energy stores were examined during a 12 month ovarian maturation cycle in captive Murray cod Maccullochella peelii peelii under simulated natural photothermal conditions. Ovarian function was found to be relatively uninhibited in captivity, with the exception that post-vitellogenic follicles failed to undergo final maturation, resulting in widespread pre-ovulatory atresia. Seasonal patterns of oocyte growth were characterised by cortical alveoli accumulation in March, deposition of lipids in April, and vitellogenesis between May and September. Two distinct batches of vitellogenic oocytes were found in Murray cod ovaries, indicating a capacity for multiple spawns. Plasma profiles of 17beta-oestradiol and testosterone were both highly variable during the maturation period suggesting that multiple roles exist for these steroids during different stages of oocyte growth. Condition factor, liver size and visceral fat stores were all found to increase prior to, or during the peak phase of vitellogenic growth. Murray cod appear to strategically utilise episodes of high feeding activity to accrue energy reserves early in the reproductive cycle prior to its deployment during periods of rapid ovarian growth.

Temporal dynamics of oocyte development, plasma sex steroids and somatic energy reserves during seasonal ovarian maturation in captive Murray cod Maccullochella peelii peelii. Publishing Authors By Initials

DM Newman,PL Jones,BA Ingram,DM Newman,PL Jones,BA Ingram,

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Temporal dynamics of oocyte development, plasma sex steroids and somatic energy reserves during seasonal ovarian maturation in captive Murray cod Maccullochella peelii peelii. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Comparative biochemistry and physiology. Part A, M

VOLUME: 148

Page Numbers: 876-87

Journal Abbreviation: Comp. Biochem. Physiol., Part

ISSN: 1095-6433

DAY: 11

MONTH: 09

YEAR: 2007

Temporal dynamics of oocyte development, plasma sex steroids and somatic energy reserves during seasonal ovarian maturation in captive Murray cod Maccullochella peelii peelii. Information

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LANGUAGE: eng

NlmUniqueID: 9806096

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Grant and Affiliation Information for Temporal dynamics of oocyte development, plasma sex steroids and somatic energy reserves during seasonal ovarian maturation in captive Murray cod Maccullochella peelii peelii.

AFFILIATION: School of Life and Environmental Sciences, Deakin University, Warrnambool, Victoria, Australia.

Country: United States

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MEDLINETA: Comp Biochem Physiol A Mol Int

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