000			nam a22 7a 4500
999			_c9475 _d9475
003			OSt
005			20181227092159.0
008			181214b xxu||||| |||| 00| 0 eng d
040			_cNARA
100			_917659 _aDayaratne P.
245			_aAge and Growth of Four Sardinella Species from Sri Lanka
260			_c1986, _aAmsterdam, _bElsevier Science Publishers,
300			_a1-33p.
440			_917698 _aFisheries Research _n; Vol.4
520			_aAge, growth and spawning season were studied in Sardinella sirm, S. albella, S. gibbosa and S. longiceps collected by gill nets in the coastal waters of Sri Lanka. Ageing was based on primary growth rings in the otoliths. The daily periodicity as verified for^S. sirm by comparing mean increase in number of rings and the time elapsed between a series of sampling dates. For the other species, the same periodicity was inferred from the similarity in structure to that of S. sirm. The species reach the following lengths after 1 year: S. albella, 12 cm; S. gibbosa, 13 cm; S. longiceps, 14 cm; S. sirm, 20 cm. The total life-cycles are 1—1.5 years. Apparently, all species reach maturity after about 1 year. There seem to be two spawning seasons per year. Estimates based on counting growth rings indicate that these coincide with the south west and north east monsoonal changes. This also agrees with the changes in maturity stages observed.
700			_917697 _aGjosaeter, Jakob
942			_cRP _2ddc