+ Site Statistics
References:
54,258,434
Abstracts:
29,560,870
PMIDs:
28,072,757
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Cortisol content of eggs and larvae of teleosts



Cortisol content of eggs and larvae of teleosts



General & Comparative Endocrinology 86(2): 189-196



The whole-animal content of the cortisol was measured in embryos and larvae of tilapia (Oreochromis mossambicus), rainbow trout (Oncorhynchus mykiss), ayu (Plecoglossus altivelis), milkfish (Chanos chanos) and yellowfin bream (Acanthropagrus latus) by radioimmunoassay following the validation of an extraction method. The total cortisol content in tilapia was 50.3 .+-. 19.1 pg immediately following fertilization, then decreased abruptly and maintained a lower level of 10-17 pg until larval hatching; after hatching the cortisol content increased to 47.2 .+-. 11.9 pg by the seventh day. Newly hatched rainbow trout had 60.3 .+-. 6.4 pg cortisol and then increased their cortisol level slowly to 83.0 .+-. 7.2 pg by the fifth day after hatching. Ayu larvae contained 5.2 pg cortisol immediately following hatching. On the other hand, pelagic milkfish revealed a much lower cortisol level, being undetectable from hatching until the second day and ranging from 0.4 to 3.7 pg from the third to seventh day after hatching. Yellowfin bream, demonstrating a similarity to milkfish, were not found to have any detectable cortisol from hatching until the third day, but presented 1.6-7.7 pg from the fifth to seventh day after hatching. The presence and clearance of cortisol during early development of fertilized eggs of tilapia suggest a maternal origin of the hormone. The amount of cortisol deposited in the larval body of tilapia increased after hatching from 25% to nearly 100% of the total cortisol in whole larvae, while that in the larval yolk sac decreased to an undetectable level, implying that the increased cortisol may be produced or secreted by the larva. The possible role of cortisol in larval development is discussed.

Please choose payment method:






(PDF emailed within 0-6 h: $19.90)

Accession: 007165341

Download citation: RISBibTeXText

PMID: 1601267

DOI: 10.1016/0016-6480(92)90101-o


Related references

Eggs and larvae of west african teleosts part 11 serraniform larvae. Bulletin de l'Institut Fondamental d'Afrique Noire Serie A Sciences Naturelles 34(2): 484-502, 1972

Eggs and larvae of west african teleosts part 13 contribution to the identification of larvae of carangidae. Bulletin de l'Institut Fondamental d'Afrique Noire Serie A Sciences Naturelles 37(4): 899-938, 1975

Eggs and larvae of west african teleosts part 12 larvae of heterosomata collected near goree island senegal. Bulletin de l'Institut Fondamental d'Afrique Noire Serie A Sciences Naturelles 34(4): 974-1003, 1972

Eggs and larvae of west african teleosts part 10 larvae of ophidioidei oligopus ophidion and carapus and of percoidei pseudupeneus. Bulletin de l'Institut Fondamental d'Afrique Noire Serie A Sciences Naturelles 34(1): 169-178, 1972

Eggs and larvae of west african teleosts part 9 the migration of sardinella aurita larvae near cape verde peninsula. Bulletin de l'Institut Fondamental d'Afrique Noire Serie A Sciences Naturelles 33(1): 227-236, 1971

The effects of salinity on the eggs and larvae of teleosts. Unknown, 1969

Acute effects of kaolinite suspension on eggs and larvae of some marine teleosts. Comparative Biochemistry & Physiology C Pharmacology Toxicology & Endocrinology 120(3): 449-455, 1998

Cholesterol content in the eggs of some freshwater teleosts. Fishery Technol, 112: 158-160, 1974

Observations on the vertical distribution of eggs and larvae of mackeral and other teleosts in the Celtic Sea and on the sampling performance of different nets in relation to stock evaluation. Journal of the Marine Biological Association of the United Kingdom, 602: 295-311, 1980

Observations on the vertical distribution of eggs and larvae of mackerel and other teleosts in the celtic sea ireland uk and on the sampling performance of different nets in relation to stock evaluation. Journal of the Marine Biological Association of the United Kingdom 60(2): 295-312, 1980

Comparative sensitivity of eggs, larvae and adults of the estuarine teleosts, Fundulus heteroclitus and Menidia menidia to cadmium. Bulletin of Environmental Contamination and Toxicology 17(6): 645-652, 1977

Biochemical composition and fatty acid content of fertilized eggs, yolk sac stage larvae and first-feeding larvae of the Senegal sole Solea senegalensis Kaup. Aquaculture 119.2-3 (15 January): 273-286, 1994

Effect of thyroxin and cortisol on the hatching of eggs, larval morphometry and survival of Heteropneustes fossilis (Bloch) larvae. Indian Journal of Fisheries. April-June; 502: 223-230, 2003