scholarly journals Teknik Penetasan Ikan Nila Oreochromis niloticus pada Corong Penetasan

2021 ◽  
Vol 1 ◽  
Author(s):  
Rahmadi Aziz ◽  
Mukti Arif ◽  
Aldi Huda Verdian
Keyword(s):  
International Cooperation ◽  
Oreochromis Niloticus

Potensi pengembangan budidaya ikan nila di Indonesia saat ini masih terus berkembang. Salah satu pengembangan budidaya ikan nila yaitu dalam teknik penetasan telur ikan nila pada corong penetasan. Penerapan teknik ini diharapkan dapat meningkatkan daya tetas telur dan tingkat kelangsungan hidup benih ikan nila semakin tinggi serta mempermudah pemanenan larva. Materi yang digunakan yaitu induk ikan nila strain JICA (Japan for International Cooperation Agency), corong penetasan berbentuk kerucut berukuran diameter 30 cm dan tinggi 45 cm dan perlengkapan pemijahan lainnya. Pengembangan teknik penetasan ikan nila menggunakan corong penetasan  mengasilkan nilai derajat penetasan sebesar 90,6 % dan tingkat kelangsungan hidup benih sebesar 96,15 %.

Ultrastructure of Testicular Spermatozoon of the Fish Oreochromis Niloticus

1988 ◽  
Vol 46 ◽  
pp. 278-279
Author(s):  
T. Guha ◽  
A. Q. Siddiqui ◽  
P. F. Prentis
Keyword(s):  
Electron Microscope ◽  
Oreochromis Niloticus ◽  
Osmium Tetroxide ◽  
Sperm Cells ◽  
Adult Fish ◽  
Testicular Sperm ◽  
Thin Sections ◽  
Important Fish ◽  
Testicular Spermatozoon ◽  
Diamond Knife

Tilapia, Oreochromis niloticus, is an economically important fish in Saudi Arabia. Elucidation of reproductive biology of this species is necessary for successful breeding program. In this paper we describe fine structure of testicular sperm cells in O, niloticus.Testes from young adult fish were fixed in gluteraldehyde (2%) and osmium tetroxide (1%), both in cacodyl ate buffer. Specimens were processed in the conventional way for electron microscopy and thin sections of tissues (obtained by cutting the blocks with a diamond knife) were stained by ura- nyl acetate and lead citrate. These were examined in a Carl Zeiss electron microscope operated at 40 kV to 60 kV. Sperm cells were obtained from testes by squeezing them in cacodyl ate buffer. They were fixed in gluteraldehyde (2%) in the same buffer, air dried, gold coated and then examined in a Philips scanning electron microscope (SEM) operated at 25kV.The spermatozoon of O. niloticus is consisting of head, midpiece and tail (Fig. 1).

Ultrastructure of primary spermatocyte in fish (Tilapia: Oreochromis niloticus): The synaptonemal complex

1986 ◽  
Vol 44 ◽  
pp. 288-289
Author(s):  
T. Guha ◽  
A. Q. Siddiqui ◽  
P. F. Prentis
Keyword(s):  
Fine Structure ◽  
Electron Microscope ◽  
Synaptonemal Complex ◽  
Oreochromis Niloticus ◽  
Short Communication ◽  
Primary Spermatocyte ◽  
Mitotic Division ◽  
Meiotic Cell ◽  
Electron Microscope Level ◽  
Homologous Chromosomes

The Primary Spermatocytes represent a stage in spermatogenesis when the first meiotic cell division occurs. They are derived from Spermatogonium or Stem cell through mitotic division. At the zygotene phase of meiotic prophase the Synaptonemal complex appears in these cells in the space between the paired homologous chromosomes. Spermatogenesis and sperm structure in fish have been studied at the electron microscope level in a few species? However, no work has yet been reported on ultrastructure of tilapia, O. niloticus, spermatozoa and spermatogenetic process. In this short communication we are reporting the Ultrastructure of Primary Spermatocytes in tilapia, O. niloticus, and the fine structure of synaptonemal complexes seen in the spermatocyte nuclei.

Belt and Road Initiative: Analysis of Possible Effects on Nigeria’s Economy

2018 ◽  
Vol 9 (06) ◽  
pp. 20475-20182
Author(s):  
Ige Ayokunle O ◽  
Akingbesote A.O
Keyword(s):  
Economic Growth ◽  
International Economic ◽  
International Cooperation ◽  
Economic Cooperation ◽  
Belt And Road Initiative ◽  
International Economic Cooperation ◽  
R Project ◽  
Belt And Road ◽  
The Relationship ◽  
The Belt And Road

The Belt and Road initiative is an important attempt by China to sustain its economic growth, by exploring new forms of international economic cooperation with new partners. Even though the B&R project is not the first attempt at international cooperation, it is considered as the best as it is open in nature and does not exclude interested countries. This review raised and answered three questions of how the B&R project will affect Nigeria’s economy?  How will it affect the relationship between Nigeria and China? What could go wrong?, The review concluded that Nigeria can only benefit positively from the project.

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