Thursday, January 21, 2010

BUDIDAYA PERIKANAN

BUDIDAYA PERIKANAN


Cleaning the fish pond embankment soil

Posted: 21 Jan 2010 06:58 AM PST


Cleaning the fish pond embankment soil


embankment pond cleaning activities carried out when the fish ponds will be used for fish cultivation. embankment pond is clean clean grass that grows on the edge of the pond embankment, the grass needs to be cleaned up and disposed of so as not to disturb the fish that will be cultivated especially for young fish. because if the grass is allowed to grow it is likely to be a nest of pests and predators such as snakes and others.
pond dikes can be cleaned using a hoe as shown in the photo above. cleaning the pool with the size 20 x 15 m 2 can be completed per day. Cultivation techniques carried out regularly. functions other than those mentioned above, the clearing of this pond dikes are also working to improve if there are damaged or embankment collapsed due to erosion






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Kegiatan membersihkan pematang kolam tanah

Posted: 21 Jan 2010 04:05 AM PST


Kegiatan membersihkan pematang kolam tanah

kegiatan pembersihan pematang kolam dilakukan ketika kolam akan dipakai untuk berbudidaya ikan. membersihkan pematang kolam yaitu membersihkan rumput- rumput yang tumbuh di pinggir pematang kolam, rumput ini perlu dibersihkan dan dibuang agar tidak mengganggu ikan yang akan dibudidayakan terutama bagi ikan yang masih kecil. karena apabila rumput tersebut dibiarkan tumbuh maka kemungkinan besar akan dijadikan sarang hama dan predator seperti ular dan lainnya.
membersihkan pematang kolam dapat menggunakan cangkul seperti yang terlihat pada foto di atas. membersihkan kolam dengan ukuran 20 x 15 m2 dapat diselesaikan sehari. Tehnik pencangkulan dilakukan secara teratur. selain fungsi yang telah disebutkan di atas, kegiatan pembersihan pematang kolam ini yaitu berfungsi juga untuk memperbaiki jika ada pematang yang rusak atau pun roboh akibat erosi

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Important factors in making tarps for fish ponds

Posted: 20 Jan 2010 08:47 PM PST


Important factors in making tarps for fish ponds

There are several important factors that must be considered in making the pool tarp, including the following.

a. Types of fish to be cultivated. This is because not all fish cultivated in ponds suitable tarpaulin. In fact, there are several kinds of fish that is not enough just with water as the medium of life, but requires additional media mud. For example, eels require the muddy bottom thick and contains organic material.

b. Fish size. This is because the size of the fish pond effect on height. For example, for seeds, young carp are not recommended to be placed into a pool made too high, but should be enough height 60 cm with 20-40 cm of water.

c. The balance between the volume of water with supporting framework must be strong. When the volume of water or the volume of mud media (for eels) pressure is quite large, frame buffer must be strong. Similarly, the ability tarp material, if thin, should not put the fish with a large volume that is not broken.

d. Basis for the laying of the pond should be flat tarp, as well as the framework does not have material that can make sharp torn or perforated sheet. If the land is not flat bottom, should be a layer of banana trunk or stem of rice husk. To frame using split bamboo, bambo parts should be placed on the outside and if the frame is made of iron, should not that easy to use because it can make a rusty torn tarp.

e. At the time of harvest and post-harvest treatment required both that the tarp was not damaged and can be used for subsequent operations.

f. Drainage pond that is made by punching holes in the tarpaulin should be done carefully so that the canvas does not leak or a sewer system to the capillary (with a suction hose).

source: Cahyo Saparinto, PenebarSwadaya, 2009





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tilapia fish which died as a result of poor water conditions

Posted: 20 Jan 2010 08:28 PM PST


tilapia fish which died as a result of poor water conditions

Male tilapia fish (above) and female tilapia fish (below) who died as a result of poor water quality in the pond. tilapia fish death was not caused by disease or parasites, but this tilapia fish die because the water volume conditions slightly due to the source as a source of irrigation pond water does not flow.

at that time there was no water at all coming into the pond. so that the pool was not filled with water, and soil conditions slightly porous pond so the pond water decreased drastically, the pool was not able to hold water longer. soil conditions other than the ugly pond tilapia fish deaths are also caused by hot weather conditions, so the pool of hot water and shrink due to evaporation. With a shrinking pool of water the fish room to be small and the supply of oxygen for respiration of fish is reduced. with conditions such water fish tilapia could not survive and the fish become stressed, for 12 hours was dead tilapia fish.

in the event the above things that need attention to prevent or overcome in order to avoid mass deaths of:

1. if the source of water in the pool shrinks and there is no water coming at all then we must move quickly tilapia fish to another pond or tub previously prepared.

2. find out information to people, because if the unit is a source of fish pond water from the irrigation water shrinkage may occur in irrigation, water shrinkage may be caused by several things including the improvement of the irrigation dam, repair irrigation channels kirmir automatically when these improvements will water needs to be depreciated. depreciation on irrigation water can occur due to natural disasters such as floods that cause irrigation dike burst.

foto Ikan Nila yang mati akibat kondisi air yang buruk

Posted: 20 Jan 2010 03:45 PM PST


Ikan Nila Jantan (atas) dan Ikan Nila Betina (bawah) yang mati akibat dari buruknya kualitas air pada kolam. kematian ikan nila ini tidak disebabkan oleh penyakit atau parasit, tetapi ikan nila ini mati karena kondisi volume air kolam yang sedikit akibat dari sumber irigasi sebagai sumber air kolam tidak mengalir.

pada waktu itu tidak ada air sedikitpun yang masuk ke kolam. sehingga kolam tidak terisi oleh air, dan kondisi kolam tanahnya sedikit porous sehingga air kolam secara drastis menurun, kolam tidak mampu menahan air lama. selain kondisi tanah kolam yang jelek kematian ikan nila ini juga disebabkan oleh kondisi cuaca yang panas, sehingga kolam airnya panas dan semakin menyusut akibat penguapan. Dengan air kolam yang menyusut maka ruang gerak ikan menjadi kecil dan suplai oksigen untuk respirasi ikan menjadi berkurang. dengan kondisi air seperti ini ikan nila tidak mampu bertahan dan ikan menjadi stres, selama 12 jam ikan nila pun mati.

pada kejadian di atas hal yang perlu diperhatikan untuk mencegah atau menanggulangi agar tidak terjadi kematian yang masal yaitu :

1. jika sumber air pada kolam menyusut dan tidak ada air yang masuk sedikitpun maka kita harus cepat-cepat memindahkan ikan nila ke kolam lain atau bak yang sebelumnya sudah dipersiapkan.

2. mencari tahu informasi kepada orang, karena jika unit perkolaman yang sumber airnya berasal dari irigasi maka bisa terjadi penyusutan air di irigasi, penyusutan air ini bisa disebabkan oleh beberapa hal diantaranya yaitu perbaikan tanggul irigasi, perbaikan kirmir saluran irigasi yang otomatis ketika melakukan perbaikan tersebut maka air perlu disusutkan. penyusutan air pada irigasi ini bisa terjadi akibat bencana alam seperti banjir yang menyebabkan tanggul irigasi jebol.
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