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Is Lake Mainit’s Pijanga in Danger?


pijanga-3Pijanga, local name for fresh white goby is the major fish species in Lake Mainit. However, the latest report shows that pijanga size is reduced. Is Pijanga now under threat?)


Lake Mainit has been identified to have rich biodiversity particularly on aquatic resources. The Foundation for the Philippine Environment ( FPE) who assessed Lake MSFMP Reportainit biodiversity through the Lake Mainit Community-Based Biodiversity Conservation and Sustainable Development project affirms that the Lake Mainit is the habitat of rare and endemic species. Based on the latest study on the Sustainable Fisheries Management Program (SFMP) for Lake Mainit conducted by the MSU-Naawan researchers from August to October 2007, it was found out that there were 27 kinds of finfish species of which some might be temporary (migratory or seasonal); 3-5 kinds crustaceans; 8-10 kinds mollusk; and 14 kinds of aquatic plants. And out of 27 kinds of finfish species, the white goby, locally known as pijanga or pedianga is commonly identified from the catches in Lake Mainit area.


White goby (Glossogobius giuris) or pijanga belongs to Family Gobiidae. It is one of the native endemic fish specie found in Lake Mainit. Accordingly, pijanga is Shallow and deep water Pijangacharacterized by having fused ventral fins which is used functionally to anchor on substrates. There are two identified types of pijanga: the deep water pijanga and the shallow water pijanga based on the characteristic of its habitat. The SFMP inception report said that pijanga is found in littoral and limnetic zones. Galicia and Lopez in 2000 reported that pijanga size ranged from 25 to 305 mm. but SFMP reported that pijanga now only ranges from 57 – 242 mm, The reduction of the pijanga size to 63 mm is quite alarming.


What the next finding would reveal might be the reduction of pijanga catches. The continuous illegal catching of sagoyun (fingerlings of pijanga) and over fishing using baling (seine) are some of the many reasons of the continuous declining of pijanga size. This indicates that pijanga might be disappearing in the next generations if unsustainable fishing practices cannot be avoided. •



Published at BANIKALAMBUAN July-December 2008 of Propegemus Foundation, Inc


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  1. […] Is Lake Mainit’s Pijanga in Danger? […]

  2. Zimm says:

    Hi johny. Good that you continually post relevant articles about LMDA and its projects. This is great. Padayon.

    A reader in the Pidjanga Blog commented to please correct “specie”… its spelling is “species”. Peter

  3. Jamil/Mike says:

    HI Johnny, may u please give us detail on the average depth and maximum depth of lake mainit shoreline. We are planning to put up a commercial fishpen in ur area. Kindly send the detail to

  4. Jamil/Mike says:

    Hi johnny, Please give us few details because we are into milkfish and tilapia culture. Thank you so much

  5. Z. B. Maslin says:

    Please don’t destroy Lake Mainit and its environs. It is a treasure that must be preserved for now and the future. It is important that the government provides alternative means of livelihood to the people. Merchants and politicians should not be so greedy to deplete the natural resources of the ordinary people. Please, can the Filipino politicians and ordinary people listen? We can only help ourselves.

  6. David de Wolff sr. says:

    Did you already notice about the Phoenix-company that want to develope the Siana mine. In my opinion this could endanger our Lake Mainit.

  7. rence says:

    i just want to ask if there is a study done about the endoparasite of the white goby?

    • Johny S. Natad says:

      Hello Rence, I dont have any idea if there is study about endoparasite of the white goby. May be some institution like Caraga State University (NORMISIST before) or Surigao del Norte College of Agriculture and Technology (SNCAT).

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Website Links THE PLACES WE BELONG Republic of the PhilippinesProvince of Surigao del Norte Municipality of AlegriaBarangay Don Julio Ouano

SCHOOLS WE ATTENDED Alegria National High School-1Alegria Central Elementary School Alegria National High School-2Global Competency-Based Training Center Mindanao State UniversityBukidnon State University

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