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| 022 | 1 | _a2672-2836 (Online) | |
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_aPH-QcNFR _beng _cPH-QcNFR |
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| 100 | 1 |
_aBuñag, Daniel M. _92713 |
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_aSpawning habits of some Philippine tuna based on diameter measurements of the ovarian ova / _cDaniel M. Buñag |
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_aQuezon City, Philippines : _bBureau of Fisheries and Aquatic Resources , _c1956 |
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_atxt _btxt |
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_atext file _bPDF |
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| 504 | _aIncludes bibliographical references | ||
| 520 | 3 | _aThe ecology of the tuna, its large size, and extensive migratory habits precludes a direct study of much of its life history. Its spawning habits have, consequently, been largely approached by such indirect methods as collecting juvenile stages and planktonic eggs, size at its first sexual maturity, and year classes based on the commercial catch, etc. The present study is an at¬tempt to add to our knowledge of the spawning behavior of Philippine tuna through the statistical analysis of growth of the ova in the ovary by measuring their increasing diameters. This method was developed by Thompson (1915) and success¬fully employed by such investigators as Clark (1925, 1929, 1934); De Jong (1940); Hickling and Rutemberg cited by De Jong (1940) ; and Mane (1929, 1934). The following com¬mercially important species of Philippine tuna were considered in the present study: Neothunnus macropterus, Katsuwonus pelamis, and Euthynnus yaito. | |
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_aTuna _xSpawning _2LCSH _93016 |
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_aSpawning _2LCSH _93017 |
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_aTuna _2LCSH _91181 |
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_aSpawning migrations _2AGROVOC _93018 |
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_078 _9134 _aPhilippines. _oIRC00008 _tThe Philippine Journal of Fisheries _x2672-2836 (Online) _gVolume 4, Issue no. 2 (July to December 1956), page 145-177 |
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_2https _uhttps://www.nfrdi.da.gov.ph/tpjf/vol4_2/SPAWNING%20HABITS%20OF%20SOME%20PHILIPPINE%20TUNA%20BASED%20ON%20DIAMETER%20MEASUREMENTS%20OF%20THE%20OVARIAN%20OVA.pdf _yOpen access |
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