Abstract：
:The total cortisol content in tilapia was 55 pg immediately following fertilization, then decreased abruptly and maintained a lower level of 10-20 pg until hatching; after hatching the cortisol content increased to 50 pg by the 7th day. Fertilized eggs were incubated in either 32% saltwater or fresh water and sampled at various developmental stages. Both groups showed dramatic changes in cortisol content following development. However, no significant difference in the cortisol level was found between the two groups. Tilapia larvae, hatched in fresh water, were reared with feed containing 0 (control) or 150 mg/kg wt/day cortisol, corticosterone, 17 alpha-hydroxyprogesterone (17 alpha-OHP) or 11 alpha-deoxycortisol (11 alpha-DC) for 8 days and then transferred directly to 27.5% saltwater. Those reared with corticosterone, 17 alpha-OHP, or 11 alpha-DC, similar to the control, all died within 4-8 hr after the transfer. However, the larvae treated with cortisol showed a much higher survival rate of 40-60%. The tissue osmolality in the control larvae, 394.3 +/- 3.7 (mmol/kg), increased abruptly after transfer to 26% saltwater and reach a peak, 681.5 +/- 47.5, before the larvae all died (12th hr after the transfer). In contrast, tissue osmolality in cortisol-treated (150 mg/kg wt/day for 12 days) larvae was 570.7 +/- 62.6 at the 12th hr and then began to decrease to 448.5 +/- 9.4 at the 24th hr and 386.0 at the 48th hr. These findings suggest that cortisol could play a critical role in the hypoosmoregulation in tilapia larvae.
journal_name
Gen Comp Endocrinoljournal_title
General and comparative endocrinologyauthors
Hwang PP,Wu SMdoi
10.1006/gcen.1993.1168subject
Has Abstractpub_date
1993-11-01 00:00:00pages
318-24issue
2eissn
0016-6480issn
1095-6840pii
S0016-6480(83)71168-8journal_volume
92pub_type
杂志文章abstract：:Ecdysis triggering hormone receptors (ETHR) regulate the behavioral sequence necessary for cuticle shedding. Recent reports have documented functions for ETHR signaling in adult Drosophila melanogaster. In this study, we report that ETHR silencing in local interneurons of the antennal lobes and fruitless neurons leads...
journal_title：General and comparative endocrinology
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更新日期：2019-07-01 00:00:00
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journal_title：General and comparative endocrinology
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journal_title：General and comparative endocrinology
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更新日期：2019-09-15 00:00:00
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journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/0016-6480(86)90255-8
更新日期：1986-01-01 00:00:00
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journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1006/gcen.2001.7628
更新日期：2001-06-01 00:00:00
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journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/0016-6480(83)90269-1
更新日期：1983-06-01 00:00:00
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journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1006/gcen.1997.6898
更新日期：1997-07-01 00:00:00
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journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1006/gcen.2001.7649
更新日期：2001-07-01 00:00:00
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journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/0016-6480(86)90148-6
更新日期：1986-09-01 00:00:00
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journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/j.ygcen.2011.10.007
更新日期：2012-01-01 00:00:00
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journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/0016-6480(84)90086-8
更新日期：1984-12-01 00:00:00
abstract：:In addition to the previously recognised thyroid hormone-binding proteins, three plasma components possibly involved in T3 and T4 transport have been identified in chicken plasma using gel filtration at pH 7.4. In mature female, though not male and immature female birds, a significant amount of T3 (11%) is bound to ve...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/0016-6480(85)90276-x
更新日期：1985-02-01 00:00:00
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journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/j.ygcen.2015.11.005
更新日期：2016-12-01 00:00:00
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journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/0016-6480(86)90100-0
更新日期：1986-04-01 00:00:00
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journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1006/gcen.1993.1103
更新日期：1993-07-01 00:00:00
abstract：:The first studies that identified leptin and its receptor (LepR) in mammals were based on mutant animals that displayed dramatic changes in body-weight and regulation of energy homeostasis. Subsequent studies have shown that a deficiency of leptin or LepR in homoeothermic mammals results in hyperphagia, obesity, infer...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：
更新日期：2014-01-01 00:00:00
abstract：:Vertebrate eggs are surrounded by an extracellular glycoprotein coat termed zona pellucida (ZP). Integrity of ZP is critical for a correct embryo development. Two zona pellucida protein genes (zpb and zpc) from European eel were characterized, specific qPCR assays developed and their expression in immature males and f...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/j.ygcen.2012.06.003
更新日期：2012-09-01 00:00:00
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journal_title：General and comparative endocrinology
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更新日期：2007-01-15 00:00:00
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journal_title：General and comparative endocrinology
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更新日期：1992-05-01 00:00:00
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journal_title：General and comparative endocrinology
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doi：10.1016/j.ygcen.2015.04.015
更新日期：2015-05-15 00:00:00
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journal_title：General and comparative endocrinology
pub_type： 杂志文章
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更新日期：2003-08-01 00:00:00
abstract：:The neotropical genus Mabuya are obligate placentotrophic viviparous lizards, which have a short vitellogenesis that produces microlecithal oocytes and a prolonged time of gestation (9 to 10 months). The hormonal control of female reproductive activity during follicular growth and pregnancy has not been studied, altho...
journal_title：General and comparative endocrinology
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doi：10.1016/j.ygcen.2020.113530
更新日期：2020-09-01 00:00:00
abstract：:Insulin pathways were demonstrated from invertebrates to vertebrates to be involved in the regulation of numerous processes including storage metabolism and reproduction. In addition, insulin system may integrate variations of environmental conditions like dietary restrictions. In the Pacific oyster Crassostrea gigas,...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/j.ygcen.2011.12.008
更新日期：2012-03-01 00:00:00
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journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/j.ygcen.2016.06.013
更新日期：2016-09-01 00:00:00
abstract：:European silver eels are thought to undergo sexual maturation during their oceanic reproductive migration from the European continent to their spawning area in the Sargasso Sea. Tracking data and various anatomical and physiological features suggest that silver eels migrate in deep sea, leading us to hypothesise that ...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/j.ygcen.2007.01.009
更新日期：2007-08-01 00:00:00
abstract：:In anaesthetized young (6 weeks old) and adult (22-30 weeks old) domestic fowl, the administration of thyrotrophin releasing hormone (TRH; 1.0 micrograms/kg in young birds; 10.0 micrograms/kg in adults) or human pancreatic growth hormone-releasing factor (hpGRF(1-44)NH2; 10.0 micrograms/kg in both cases) markedly incr...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/0016-6480(85)90413-7
更新日期：1985-07-01 00:00:00
abstract：:Connective tissue growth factor (CTGF) is a cysteine-rich, matrix-associated heparin-binding protein that is important in many cell types as a regulator of cell proliferation, angiogenesis, cell remodelling and other cellular processes. CTGF is necessary for normal follicle growth and luteinisation in mammals. The avi...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/j.ygcen.2012.06.018
更新日期：2012-09-01 00:00:00
abstract：:The relationships between testicular and plasma hormone levels and the decline in fertility in aging roosters were examined. Body mass, testicular mass, and fertility were measured in roosters from 20 to 72 weeks of age. Plasma was assayed for LH and testosterone, and estradiol and testicular extracts were assayed for...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1006/gcen.1999.7276
更新日期：1999-07-01 00:00:00
abstract：:The existence of direct progestin actions on teleost sperm to stimulate hypermotility is not widely acknowledged because it has only been demonstrated in members of the family Sciaenidae. In the present study, progestin stimulation of sperm hypermotility was investigated in a non-sciaenid, southern flounder, and the p...
journal_title：General and comparative endocrinology
pub_type： 杂志文章
doi：10.1016/j.ygcen.2010.12.005
更新日期：2011-02-01 00:00:00
