Age-related changes in ovarian characteristices, plasma sex steroids and fertility during pubertal development in captive female Murray cod Maccullochella peelii peelii
Age-related changes in ovarian development characteristics and plasma sex steroids in female Murray cod were examined throughout their second, third and fourth years of life to better understand the physiological and endocrine processes associated with puberty in this species in captivity. Spawning...
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ftdeakinunifig:oai:figshare.com:article/21055540 2023-05-15T15:32:43+02:00 Age-related changes in ovarian characteristices, plasma sex steroids and fertility during pubertal development in captive female Murray cod Maccullochella peelii peelii Dane Newman Paul Jones Brett Ingram 2008-08-01T00:00:00Z http://hdl.handle.net/10536/DRO/DU:30017885 https://figshare.com/articles/journal_contribution/Age-related_changes_in_ovarian_characteristices_plasma_sex_steroids_and_fertility_during_pubertal_development_in_captive_female_Murray_cod_Maccullochella_peelii_peelii/21055540 unknown http://hdl.handle.net/10536/DRO/DU:30017885 https://figshare.com/articles/journal_contribution/Age-related_changes_in_ovarian_characteristices_plasma_sex_steroids_and_fertility_during_pubertal_development_in_captive_female_Murray_cod_Maccullochella_peelii_peelii/21055540 All Rights Reserved Physiology Zoology age-at-maturity ovarian development recirculating aquaculture systems spawning Science & Technology Life Sciences & Biomedicine Biochemistry & Molecular Biology FOLLICLE-STIMULATING-HORMONE SALMON SALMO-SALAR MORONE-SAXATILIS ATLANTIC SALMON STRIPED BASS MITCHELL PERCICHTHYIDAE GONADAL DEVELOPMENT REPRODUCTIVE-CYCLE ENERGY RESERVES COHO SALMON Text Journal contribution 2008 ftdeakinunifig 2022-11-17T22:53:16Z Age-related changes in ovarian development characteristics and plasma sex steroids in female Murray cod were examined throughout their second, third and fourth years of life to better understand the physiological and endocrine processes associated with puberty in this species in captivity. Spawning performance of 2+ and 3+ year old females was also assessed to identify ontogenetic differences in egg fertility. Puberty was acquired in 38% of 1+ year old females and 100% of age 2+ females. By age 3+, all females had developed full (adult) reproductive function. Ovarian development in pubertal fish was characterised by a rapid transition between cortical alveoli and lipid droplet oogenic phases, coinciding with significantly lower plasma 17β-oestradiol in age 2+ females ( p < 0.05). Mean mature oocyte diameter (2.44 mm), post-fertilisation viability (30.80%) and hatchability (0.99%) of eggs from age 2+ females were significantly reduced relative to age 3+ adults (2.81 mm, 84.89% and 23.58%, respectively). Ovaries of pubertal Murray cod exhibited both vitellogenic and ovulatory capacities, yet functional abnormalities during secondary oocyte growth are likely to have contributed to poor egg fertility and consequently, evaluations of age-at-first maturity based on the presence of advanced ovarian stages may overestimate the reproductive potential of younger broodstock populations. Other Non-Article Part of Journal/Newspaper Atlantic salmon Salmo salar DRO - Deakin Research Online |
institution |
Open Polar |
collection |
DRO - Deakin Research Online |
op_collection_id |
ftdeakinunifig |
language |
unknown |
topic |
Physiology Zoology age-at-maturity ovarian development recirculating aquaculture systems spawning Science & Technology Life Sciences & Biomedicine Biochemistry & Molecular Biology FOLLICLE-STIMULATING-HORMONE SALMON SALMO-SALAR MORONE-SAXATILIS ATLANTIC SALMON STRIPED BASS MITCHELL PERCICHTHYIDAE GONADAL DEVELOPMENT REPRODUCTIVE-CYCLE ENERGY RESERVES COHO SALMON |
spellingShingle |
Physiology Zoology age-at-maturity ovarian development recirculating aquaculture systems spawning Science & Technology Life Sciences & Biomedicine Biochemistry & Molecular Biology FOLLICLE-STIMULATING-HORMONE SALMON SALMO-SALAR MORONE-SAXATILIS ATLANTIC SALMON STRIPED BASS MITCHELL PERCICHTHYIDAE GONADAL DEVELOPMENT REPRODUCTIVE-CYCLE ENERGY RESERVES COHO SALMON Dane Newman Paul Jones Brett Ingram Age-related changes in ovarian characteristices, plasma sex steroids and fertility during pubertal development in captive female Murray cod Maccullochella peelii peelii |
topic_facet |
Physiology Zoology age-at-maturity ovarian development recirculating aquaculture systems spawning Science & Technology Life Sciences & Biomedicine Biochemistry & Molecular Biology FOLLICLE-STIMULATING-HORMONE SALMON SALMO-SALAR MORONE-SAXATILIS ATLANTIC SALMON STRIPED BASS MITCHELL PERCICHTHYIDAE GONADAL DEVELOPMENT REPRODUCTIVE-CYCLE ENERGY RESERVES COHO SALMON |
description |
Age-related changes in ovarian development characteristics and plasma sex steroids in female Murray cod were examined throughout their second, third and fourth years of life to better understand the physiological and endocrine processes associated with puberty in this species in captivity. Spawning performance of 2+ and 3+ year old females was also assessed to identify ontogenetic differences in egg fertility. Puberty was acquired in 38% of 1+ year old females and 100% of age 2+ females. By age 3+, all females had developed full (adult) reproductive function. Ovarian development in pubertal fish was characterised by a rapid transition between cortical alveoli and lipid droplet oogenic phases, coinciding with significantly lower plasma 17β-oestradiol in age 2+ females ( p < 0.05). Mean mature oocyte diameter (2.44 mm), post-fertilisation viability (30.80%) and hatchability (0.99%) of eggs from age 2+ females were significantly reduced relative to age 3+ adults (2.81 mm, 84.89% and 23.58%, respectively). Ovaries of pubertal Murray cod exhibited both vitellogenic and ovulatory capacities, yet functional abnormalities during secondary oocyte growth are likely to have contributed to poor egg fertility and consequently, evaluations of age-at-first maturity based on the presence of advanced ovarian stages may overestimate the reproductive potential of younger broodstock populations. |
format |
Other Non-Article Part of Journal/Newspaper |
author |
Dane Newman Paul Jones Brett Ingram |
author_facet |
Dane Newman Paul Jones Brett Ingram |
author_sort |
Dane Newman |
title |
Age-related changes in ovarian characteristices, plasma sex steroids and fertility during pubertal development in captive female Murray cod Maccullochella peelii peelii |
title_short |
Age-related changes in ovarian characteristices, plasma sex steroids and fertility during pubertal development in captive female Murray cod Maccullochella peelii peelii |
title_full |
Age-related changes in ovarian characteristices, plasma sex steroids and fertility during pubertal development in captive female Murray cod Maccullochella peelii peelii |
title_fullStr |
Age-related changes in ovarian characteristices, plasma sex steroids and fertility during pubertal development in captive female Murray cod Maccullochella peelii peelii |
title_full_unstemmed |
Age-related changes in ovarian characteristices, plasma sex steroids and fertility during pubertal development in captive female Murray cod Maccullochella peelii peelii |
title_sort |
age-related changes in ovarian characteristices, plasma sex steroids and fertility during pubertal development in captive female murray cod maccullochella peelii peelii |
publishDate |
2008 |
url |
http://hdl.handle.net/10536/DRO/DU:30017885 https://figshare.com/articles/journal_contribution/Age-related_changes_in_ovarian_characteristices_plasma_sex_steroids_and_fertility_during_pubertal_development_in_captive_female_Murray_cod_Maccullochella_peelii_peelii/21055540 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_relation |
http://hdl.handle.net/10536/DRO/DU:30017885 https://figshare.com/articles/journal_contribution/Age-related_changes_in_ovarian_characteristices_plasma_sex_steroids_and_fertility_during_pubertal_development_in_captive_female_Murray_cod_Maccullochella_peelii_peelii/21055540 |
op_rights |
All Rights Reserved |
_version_ |
1766363211720818688 |