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Archive for the ‘Fish/Fisheries’ Category

Green Mussel (Tahong) Culture

January 11th, 2010 arnx No comments
tahongThe green bay mussel or tahong (Perna viridis) is a popular and delicious food item. It is rich in vitamins, minerals, protein and carbohydrates.

Green mussels were originally regarded as pests before World War II because they competed with food and space in oyster farms. In 1950, it was recognized as a primary bivalve food. The first mussel commercial farm started in Bacoor, Cavite, in 1955.

How to culture Green Mussel or Tahong

Site selection

Mussels are known to exist in bays, coves and inlets. They are found in Manila bay, east coast of Panay, Negros Occidental southwest coast and in Maqueda Bay and Jiabong, Samar. Read more…

Oyster (Talaba) Culture

January 9th, 2010 arnx No comments

tal

Oyster culture in the Philippines began at Hinigaran, Negros Occidental, in 1921. Oyster or talaba is a popular bivalve delicacy because of its excellent flavor and taste. It is mostly marketed in the shell as freshly-shucked meat. Some salted oyster or bagoong are made during peak harvest season. It is rich in vitamins, minerals, proteins and carbohydrates. The shells are mostly used as raw materials for the manufacture of lime and poultry grit. The shells also serve as spat collectors for culturing.

Mariculture of oysters have been expanding to other areas in the past years. There are about 5 sq km used for oyster culture ranging from 1,500 m-5,000 sq m in about 1,300 farms. Oyster farms are located in 17 provinces comprising Regions I, IV and VI. Major producers are Negros Occidental, Pangasinan and Cavite (Oyster, Commodities Series, No. 64, TLRC 1988). There are little or no available records of oyster preparation exports and data on consumption. Oysters are mostly consumed near production areas.

Site selection

Oysters thrive best in brackish to marine waters with salinity ranging from 15-26 ppt at 20-30ÂșC water temperature. Viable oyster farming grounds have indigenous species of spawners that are present. The water should be free from pollution with green to blue-green color. The area should be free from flooding that may result to 0-10 ppt salinity; this causes heavy mortality and heavy siltation. Water depth should be at least 1.5-4.0 m at the lowest tide.
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Mud Crab (Alimango) Raising

December 17th, 2009 arnx No comments

Ang alimango o mudcrab ay itinuturing na isang mahalagang pagkain mula sa dagat . Mainam pagkakitaan ito dahil masarap ang lasa kaya mataas ang halaga sa merkado.

Ang buntis na alimango o gravid o pregnant na maraming itlog at aligue ay iniluluwas sa ibang bansa tulad sa Hapon, Tsina, Honkong, at Taiwan. Naniniwala ang mga intsik na ang alimango ay may dalang katangiang gamot na makakabuti sa mga nagkakaedad at mga nagpapagaling sa sakit.

Uri ng Alimango

Hindi lahat ng nag-aalaga ng alimango ay alam kung alin ang pinakamagandang uri dahil sa biglang tingin, halos magkapareho ang anyo. Lingid sa ating kaalaman ang may pinakamataas na uri at pinakamahal ang presyo ay ang uring Scylla o mas kilala sa tawag na higanteng alimango o “king of crabs”. Ito ay may apat na uri: Scylla serrata, Scylla olivacea, Scylla traquebarica, at Scylla paramamosain.

Ang Scylla serrata ang pinakapaboritong alagaan ng mga magsasaka, madali itong palakihin at patabain. Mas mabilis lumaki ang uring ito. Ang iba ay tumitimbang ng 1 kg. pagkaraan ng 6 na buwan. Kapag palagian o regular na pinapakain, maayos itong nabubuhay sa dagat-dagatan of pond. Bihira itong naghuhukay sa putik o burrow kung kaya walang napipinsalang dike.

Ang maliit na alimango o crab seeds ay hinuhuli ng mga mangingisda sa tabing dagat at sa iba pang tirahan ng alimago, at ipinagbibili sa mga fishpond operators.

Ang alimango ay pinalalaki sa tubig na pinaghalong tabang at alat o brackish water. Maaring pagsabayin ang pag-aalaga ng alimango at bangus, subalit hindi ang alimango at sugpo dahil kinakain ng alimango ang sugpo kapag nagsimula nang magluno ang huli. Kailangan lagging may mapagkukunan ng semilya o crab crab seeds sa lugar na pagtatayuan ng crab farm.

Pag-aalaga at Pagpapataba ng Alimango

A. Unang Paraan

1. Pumili ng lugar na may sapat na brackish water, 10-20 part per thousand [ppt] ng kaalatan.

2. Tiyakin ang uri ng lupa ay maputik mabuhangin o sandy nived at hindi malagkit.

3. Magsala-sala ng kawayan, dalawang metro ang taas parang banig. Ito ang ibakod sa dagat-dagatan. Itusok sa lupa ang kawayan, dalawang pulgada ang lalim ng pagkatusok para sa maayos na pagkatirik nito. Mula sa bukana ng dike, lagyan ng banatan o bamboo screen ang pangunahing dike upang hindi makawala ang alimango.

4. Patubigan ang dagat-dagatan, na may 50-70 metro ang lalim. Kailangan may maayos na daluyan ng tubig para mapanatiling malinis ang tubig.

5. Ilagay ang 2-3 piraso ng katang o batang alimango na may timbang na 10-15 gramo bawat isa. Sa bawat isa. Sa bawat ektarya kinakailangang maglagay ng 2,000-5,000 semilya o crab seeds.

6. (a) Hindi malaking suliranin ang pagkain sa mga semilya dahil kumakain ito ng lumot na tumtubo sa palaisdaan.

(b) Pakainin ang lumalaking alimango ng maliit na isda, tinatawag na transhfishes, 5-8% ang dami batay sa timbang ng alimango. Timbangin ang alimango kada 20 araw upang malaman ang tamang dami nang ipapakain.

7. Anihin ang alimango pagkaraan ng 90-120 araw.

B. Pangalawang Paraan

1. Alagaan ang alimango sa lugar na ang tubig ay may sapat na alat, 10-20 ppt salinity.

2. Gumawa ng bamboo cages, mga hawlang yari sa kawayan isang talampakan ang taas at isang talampakan din ang luwang.

3. Sa bawa’t hawla, lagyan ng alimangong may timbang na 150-200 gramo. Ilagay ito sa fishpond at alagaan ang mga alimango sa loob ng 15 araw.

4. Dalawang beses na pakainin ng 10-20 gramong “trashfishes” sa isang arw (isa sa umaga at isa sa hapon). Dagdagan kung kinakailangan.

5. Pagkalipas ng 15 araw, mapupuna na ang balat nito sa likodo carapace ay 12-15 sentimetro na ang lapad. Ang bawat alimango ay tumitimbangng mga 250-300 gramo. Ito ay palatandaan na ang mga alimango ay maari nang anihin at ipagbili.

Pag-aani

1. Handa nang ipagbili ang mga alimango kapag ang isa o dalawang piraso ay tumitimbang ng isang kilo.

2. Ang alimango ay hinuhuli sa pamamgitan ng bintol (traps), panukot (hooks), sakag (scissor net) at pante (gill net).

3. Ang mga alimango ay ipinagbibili ng buhay at puwedeng manatiling buhay kahit wala sa tubig ng pitong araw. Kailangan lamang na panatilihin sa mahalumigmig na lagayan at palaging basain ang alimango.

4. Talian ang mga alimango ng tuyong dahon ng sasa magkabilang sipit malapit sa tiyan.

Source: 1. SEADEC Asian Aquaculture, Vol. XXI No. 4 Aug. 1999;2. Pag-aalaga ng Alimango, RFU IV; 3. Crab Farming, PNB Pangkabuhayan ng Bayan; 4.http://www.da.gov.ph; photo from www.goingrank.com

Humminbird PiranhaMAX 170 Fishfinder

August 13th, 2009 arnx No comments

Humminbird PiranhaMAX 170 Fishfinder

Product Description
One touch. That’s all it takes to get easy-access to all the advanced features of the PiranhaMAX Series fishfinders. Fish ID+, fish alarms, depth alarms, zoom and more-and start putting more fish in your livewell. Clear Edge Greyscale displays ensure you’ll see more onscreen, even in direct sunlight. Simplicity and performance-that’s what’s made the PiranhaMAX a #1 choice among anglers. The PiranhaMAX 170 features a dual beam sonar, 240 Vertical pixels and 8 level Greyscale.

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Humminbird Matrix 12 Fish Finder

August 12th, 2009 arnx No comments

Humminbird Matrix 12 Fish Finder

The Humminbird Matrix 12 is a for the serious recreational angler ready for a step up from traditional fishfinders. The Matrix 12 offers incredible ease of use, as well as a big screen for crisp images with better detail and clarity. This little helper may be small, but has huge built-in capabilities, and offers you the option of adding powerful, advanced accessories, making it the perfect companion for your fishing outings. Affordable and compact, the Matrix 12 utilizes a precision 20-degree single-beam sonar for better bottom and structure definition, and reaches a depth of up to 800 feet. While ideal for small spaces, this fishfinder is big in performance, with real-time sonar that instantly captures the action under your boat at up to 40 times per second, and Sonar Echo Enhancement that reveals the smallest details — even bait when vertical jigging! All the information you need is displayed on an high-definition, five-inch LCD screen with 240×240 lines, in 12-level grayscale in your choice of Inverse Grayscale, Whiteline, High Contrast Bottom Black, or Structure ID Bottom Presentation. This fishfinder has a high-speed, micro-dynamic transducer for optimum performance that is reliable up to 70 mph, and even includes water temperature and is speed capable. The Matrix 12 also has full GPS trackplotting capability to show position, mark hotspots and easily find your way home, as well as PC-connection capability to save and manage waypoints and upgrade internal software. The GPS capability has a full-screen trackplotter and a 3D track and split-screen sonar track with an adjustable split. Easy to use, this fishfinder includes advanced upgrades that are plug-and-play compatible, from the GPS receiver, to the SmartCast wireless sonar link and PC connection accessories. The Matrix 12 features one-touch zoom with 2x, 4x, 6x and 8x zoom levels, and TripLog with distance, elapsed time, and average speed when used with an optional speed sensor. This fishfinder has both fresh and saltwater set-up options for optimal performance in any environment, and allows for both totally automatic, or totally manual operation with upper and lower range control. The system also features a selectable large, easy-to-read digital readout with a backlight for night fishing, adjustable chart speed, and a memory that retains your settings, as well as alarms for depth, fish, and battery life. The Matrix 12 includes an adjustable chart speed, an instant image update that immediately shows results of settings changes for accurate fine tuning, and a freeze-frame that pauses the sonar scroll for detailed screen inspection. As an added convenience, this finder is ultra-compact in size, with an easy-on, easy-off one-button mounting system that allows it to go almost anywhere. The Matrix 12 is built tough with fully gasketed and waterproof construction so it even floats, and is assembled in the USA with a manufacturer’s one-year warranty. The Matrix 12 runs on 10-2 (more…)