Hormonal changes accompanying sexual maturation in captive milkfish (Chanos chanos Forsskal)
MetadataShow full item record
Cited times in Scopus
Steroid hormone profiles accompanying sexual maturation in captive milkfish are described. There were no significant differences in levels of serum estradiol 17-β (E2) and testosterone (T) between immature male and female fish. Mean E2 levels rose from 0.54±0.11 ng/ml in immature females (Stage 1) to 4.53±1.16 ng/ml in vitellogenic females (Stage 5), while T levels increased from 2.06±0.28 ng/ml to 38.4±9.26 ng/ml. E2 and T levels were positively correlated to GSI and oocyte diameter. In males, serum T levels increased from 2.5±0.40 ng/ml in immature males to 27.73±5.02 ng/ml in spermiating males. A significantly higher T level was found in males with thick and scantly milt (spermiation index, SPI, 2) compared to males with scanty milt (SPI, 1) or males with copious, fluid milt (SPI, 3). Serum levels of E2 and T, and the GSI in females rose significantly during the breeding season (April–June 1983). The levels of both steroids dropped below 1 ng/ml in spent females sampled in succeeding months. In immature males, T levels ranged from 1.11 ng/ml to 2.78 ng/ml and rose significantly to 21.52±8.38 ng/ml during the breeding season when GSI peaked. Serum T levels dropped to around 10 ng/ml in the succeeding months when only spent or regressed males were sampled.
Marte, C. L., & Lam, T. J. (1992). Hormonal changes accompanying sexual maturation in captive milkfish (Chanos chanos Forsskal).
Fish Physiology and Biochemistry, 10(4), 267-275. https://doi.org/10.1007/BF00004475
- AQD Journal Articles 
Showing items related by title, author, creator and subject.
International Milkfish Workshop Conference, May 19-22, 1976, Tigbauan, Iloilo, Philippines Southeast Asian Fisheries Development Center, Aquaculture Department; International Development Research Centre (Aquaculture Department, Southeast Asian Fisheries Development Center, 1976)
A review of SEAFDEC/AQD finfish breeding research Garcia, LM (Aquaculture Department, Southeast Asian Fisheries Development Center, 1996)Recent progress undertaken by SEAFDEC/AQD in the development of broodstock of a variety of cultured fish in the Philippines is reviewed. Spontaneous maturation and spawning has been achieved among captive breeders of ...
Induced gonadal maturation and rematuration in milkfish: Limited success with chronic administration of testosterone and gonadotropin-releasing hormone analogues (GnRH-A) Marte, Clarissa L.; Crim, Laurence W.; Sherwood, Nancy M. (Elsevier, 1988)Nine experiments were conducted to investigate the influence of chronic administration of testosterone (T) and gonadotropin-releasing hormone (GnRH) analogues on first maturation of 4- to 6-year-old fish and rematuration ...