Reproductive cycle and plasma levels of sex steroids in female Eurasian perch

Sulistyo, Isdy; Rinchard, Jacques; Fontaine, Pascal; Gardeur, Jean-Noël; Capdeville, Bruno; Kestemont, P.

doi:10.1016/s0990-7440(98)80066-1

Cited by 79 publications

(56 citation statements)

References 36 publications

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“…In some species there is an additional period after spawning in the annual reproductive cycle lasting 1-2 months. These observations were described by Sulistyo et al (2000) in Eurasian perch testes and were confirmed in the present study. The lack of spermatids in the late part of spawning period in the testes of perch suggests a pause in the spermatogenesis process after the end of the reproductive season.…”

Section: Discussionsupporting

confidence: 92%

“…In the testes of fish collected in October, all phases of germ cells were observed. Similar histological observations of perch testes were reported by Sulistyo et al (2000).…”

Section: Discussionsupporting

confidence: 90%

“…In thermally polluted lakes, a shift of the time of spawning of perch from April to March was observed by Długosz (1983). In this case the post-spawning period was observed in most males in April, when in normal thermal conditions the testes are in the phase of spawning readiness (Sulistyo et al, 2000; this study).…”

Section: Discussionmentioning

confidence: 63%

“…Investigations into oogenesis and spermatogenesis of Eurasian perch were conducted by Sulistyo et al (1998Sulistyo et al ( , 2000. Studies on sperm motility and concentration, and on the levels of steroid hormones in the spawning time in perch have already been carried out for many years but not in relation to spermatogenesis in the testis.…”

Section: Quality Of Semen and Histological Analysis Of Testes In Euramentioning

confidence: 99%

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Quality of semen and histological analysis of testes in Eurasian perch Perca fluviatilis L. during a spawning period

Król¹,

Demska‐Zakęś²,

Hliwa³

2006

CZECH J ANIM SCI

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ABSTRACT:A qualitative assessment of the Eurasian perch Perca fluviatilis semen describing the basic parameters of seminal plasma was completed. The histological methods used in this study showed changes in perch gonads during a spawning and post-spawning period. At the late period of the spawning season, the structure of testes was clearly loosened and spermatozoa did not fill uniformly all the ampullae of the testes, leaving free spaces at their banks and no spermatids were observed. The results confirmed that there was an additional period after spawning in the annual reproductive cycle of the male Eurasian perch. In both years of investigations (2000)(2001), an essential decline in sperm motility at the late period of the spawning season was observed, from more than 85% to 56% in 2000. The sperm motility was not influenced by sperm concentrations because throughout the spawning time no changes in the sperm concentration were observed, 32.4 and 32.6 mld/ml at beginning and at the late period of spawning period, respectively. In contrast to sperm concentrations, protein concentrations in seminal plasma increased in the late period of spawning season, from 3.95 to 5.16 g/l in 2001. This study confirmed that protein concentrations in the seminal plasma of most fish are much lower than in the other vertebrates. Among the fish examined, perch is characterized by one of the highest values of protein concentrations in plasma. Our observations confirmed that a high water temperature influenced anatomical and functional parameters of the reproductive system in male perch.

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Section: Discussionsupporting

confidence: 92%

“…In the testes of fish collected in October, all phases of germ cells were observed. Similar histological observations of perch testes were reported by Sulistyo et al (2000).…”

Section: Discussionsupporting

confidence: 90%

Section: Discussionmentioning

confidence: 63%

Section: Quality Of Semen and Histological Analysis Of Testes In Euramentioning

confidence: 99%

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Quality of semen and histological analysis of testes in Eurasian perch Perca fluviatilis L. during a spawning period

Król¹,

Demska‐Zakęś²,

Hliwa³

2006

CZECH J ANIM SCI

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“…Hormon androgen 11-KT dan T meningkat bertahap dalam proses spermatogenesis dan mencapai level puncak secara singkat sebelum atau pada saat awal mula musim pemijahan (Schulz & Nóbrega, 2011). Pada penelitian ini, peningkatan T menunjukkan adanya tanda-tanda munculnya spermatogenesis, sehingga diduga peningkatan yang sangat kecil pada konsentrasi plasma T sudah cukup menginduksi permulaan perkembangan testis (Sulistyo et al, 2000). Perubahan pada level plasma androgen mempunyai hubungan dengan aktivasi sel sertoli dan sel leydig, induksi mitosis spermatogonial dan pembentukan lobular pada Japanese eel jantan (Saksena et al 1995).…”

unclassified

Induced maturation of eel weighed 100–150 gram with PMSG, antidopamine, and 17α-methyltestosterone

Aryani¹,

Sudrajat²,

Carman³

2015

Jurnal Akuakultur Indonesia

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PENDAHULUANIkan sidat di Indonesia belum dimanfaatkan secara optimal karena belum banyak dikenal oleh masyarakat padahal banyak ditemukan di wilayah perairan Indonesia. Indonesia menjadi salah satu negara yang berpotensi mengembangkan produksi ikan sidat di pasaran lokal maupun internasional. Salah satu jenis ikan sidat yang cukup potensial di Indonesia adalah Anguilla bicolor bicolor. Budidaya ikan sidat di Indonesia masih terbatas sampai di segmen pembesaran ABSTRACTMarketed eel Anguilla bicolor bicolor is commonly produced from larvae rearing activity whose broodstocks and larvae are caught from the nature. Supply of eel broodstock is restricted by its life cycle and uncertain size variation of mature male and female. This study was aimed to evaluate the effect of hormonal induction through injection to enhance masculinization and gonadal maturation of eel at the weight of 100-150 g. The experiment used completely random design with the use of combination pregnant mare serum gonadotropin (PMSG), antidopamine (AD), dan 17α-methyltestosterone (MT), which were (10 IU/kg PMSG + 0,01 mg/kg AD), P2 (20 IU/kg PMSG + 0,01 mg/kg AD), P3 (10 IU/kg PMSG + 0,01 mg/kg AD + 150 µg/kg MT), P4 (20 IU/kg PMSG + 0,01 mg/kg AD + 150 µg/ kg MT), and P5 (control; without hormonal treatment). The result showed that an increasing of fish length along with fish weight were performed by treatment P4 and P3. The highest gonadosomatic index value was obtained by treatment P3 (1,3030±0,24262). Based on gonadal histology analysis, 2 nd phase of spermatogonia development was found in P3 in week-8. The highest testosterone level was obtained by treatment P3, followed by P4, P2, and P1 in week-4. Combination of 10 IU/kg PMSG + 0,01 mg/kg AD + 150 µg/kg MT could enhance masculinization and gonadal maturation of eel in eight weeks of rearing period.Keywords: gonadal maturation, Anguilla bicolor bicolor, PMSG, AD, MT ABSTRAKIkan sidat Anguilla bicolor bicolor yang dipasarkan pada umumnya merupakan hasil usaha pembesaran yang benih dan induknya masih diperoleh dari alam. Penyediaan induk ikan sidat terkendala dengan siklus hidup dan variasi perbedaan ukuran induk ikan sidat jantan dan betina matang gonad yang belum pasti. Penelitian ini bertujuan untuk mengkaji peran induksi hormonal yang disuntikkan pada ikan sidat dalam mempercepat proses pematangan gonad ikan sidat ukuran 100-150 g. Metode penelitian yang digunakan adalah metode eksperimen rancangan acak lengkap dengan kombinasi pregnant mare serum gonadotropin (PMSG), antidopamin (AD), dan 17α-metiltestosteron (MT) sebagai berikut P1 (10 IU/kg PMSG + 0,01 mg/kg AD), P2 (20 IU/kg PMSG + 0,01 mg/kg AD), P3 (10 IU/kg PMSG + 0,01 mg/kg AD + 150 µg/kg MT), P4 (20 IU/kg PMSG + 0,01 mg/kg AD + 150 µg/kg MT), dan P5 (kontrol; tanpa perlakuan hormon). Hasil penelitian menunjukkan peningkatan pertambahan panjang seiring dengan pertambahan bobot diperoleh dari perlakuan P4 dan P3. Indeks gonadosomatik tertinggi diperoleh dari perlakuan P3 (1,3030±0,24262). Hasil histologi gonad ditemukan perkembangan...

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References

2000

Percid Fishes

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Reproductive cycle and plasma levels of sex steroids in female Eurasian perch

Cited by 79 publications

References 36 publications

Quality of semen and histological analysis of testes in Eurasian perch Perca fluviatilis L. during a spawning period

Quality of semen and histological analysis of testes in Eurasian perch Perca fluviatilis L. during a spawning period

Induced maturation of eel weighed 100–150 gram with PMSG, antidopamine, and 17α-methyltestosterone

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