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040			_aPH-QcNFR _beng _cPH-QcNFR
100	1		_aJuliano, Rogelio O. _92833
245	1	4	_aThe gross morphology of the gas bladders of some Laguna de Bay fishes / _cRogelio O. Juliano
264		1	_aQuezon City, Philippines : _bBureau of Fisheries and Aquatic Resources , _c1960
336			_atxt _btxt
337			_ac _bc
338			_acr _bcr
347			_atext file _bPDF
504			_aIncludes bibliographical references
520	3		_aGas bladder is a term with more universal acceptance than swim bladder or air bladder. The latter terms are misnomers in the sense that gas bladder is not really used for swimming nor the gases it contains are of the same proportion as the gases in air. The bladder is a hollow, retroperitoneal organ lying against the peritoneum ventrally and the kidneys dorsally. The bladder is an evagination either from the middorsal or lateral walls of the foregut. In some fishes the connection with the foregut still persists. In general, a pneumatic duct, the duct connecting the gas bladder to foregut, persists in soft-rayed fishes; in spiny-rayed fishes this duct is degenerated and the bladder loses its connection with the alimentary canal thus completely isolating it from the outside. Fishes with pneu-matic ducts are called physostomous fishes, or physostomes; those without are the physoclistous fishes, or physoclists. Both terms, physostomous and physoclistous, can also be used to describe the gas bladders.
546			_aeng _beng
650		0	_aAir-bladder (in fishes) _2LCSH _93587
650		0	_aMorphology _2AGROVOC _93588
651		0	_aLaguna de Bay (Philippines) _2LCSH _93300
773	0		_078 _9139 _aPhilippines. _oIRC00012 _tThe Philippine Journal of Fisheries _x2672-2836 (Online) _gVolume 8, Issue no. 1 ( 1960), page 1-22
856	7		_2https _uhttps://www.nfrdi.da.gov.ph/tpjf/vol8/THE%20GROSS%20MORPHOLOGY%20OF%20THE%20GAS%20BLADDERS%20OF%20SOME%20LAGUNA%20DE%20BAY%20FISHES.pdf _yOpen access
942			_2lcc _n0 _cJA _iIMC000055
999			_c791 _d791