Studies on the fishes in Pansipit River [Philippines]
1998
Pagulayan, R.G. | Magbanua, F.S. (Philippines Univ. Diliman, Diliman, Quezon City (Philippines). Coll. of Science)
Monthly beach seine from February through December 1998 within the Pansipit and Palanas Rivers produced a total of 59 species belonging to 37 families. This study was conducted to determine: (1) the ichthyofaunal species composition of Pansipit River including Palanas River, a diverging branch of Pansipit that also empties in Balayan Bay approximately 3 km from the mouth of Pansipit River; (2) the abundance and seasonality of the important species under study; and (3) if the fish populations exhibit specific site/habitat preference or longitudinal distribution pattern. Of the 59 species, 21 species were caught exclusively in Pansipit, 26 in Palanas, while 12 were present in both rivers. Pansipit River supports a total of 33 species, 65% of which are migratory. Palanas River, on the other hand, supports a total of 38 species, of which 68% are migratory. Previous studies after Herre (1927) noted only 8-9 migratory species. The difference between their species composition and the authors might either be due to the inherent efficiency and selectivity of the sampling gear used or due to the regulation of the establishment of fishpens and fish corals during this period
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