Olney and McBride, 2003


No detailed citation.

Associated characteristics

Species Development state Trait Primary Data Secondary Data
Alosa sapidissima Egg Oocyte diameter Two modes for hydrated oocytes: 1.8 and 2.0 [Range from 1.6 to 2.4] 1.8 mm
Alosa sapidissima Female Age at sexual maturity 4-5 [Female] 4.5 year
Alosa sapidissima Female Length at sexual maturity Mean of fork length of 42.5-47.3 [For females of 4-8 years] 44.9 cm
Alosa sapidissima Female Weight at sexual maturity Mean of 1.241-1.483, range from 0.848 to 1.900 [Female specified] 1.36 kg
Alosa sapidissima Female Relative fecundity Means varies between 188.3 to 236.3, all variations range from 159.9 to 360. Means of batch sizes vary from 39,658 to 48,113 eggs 188.3 thousand eggs/kg
Alosa sapidissima Female Absolute fecundity 37-44 40.5 thousand eggs
Alosa sapidissima Female Oocyte development Oocyte sizes are bimodal, the hydrated oocytes representing a cohort distinct from the smaller oocytes No category
Alosa sapidissima Female Maximum GSI value 14-19 [Calculated from values given by the authors] 16.5 percent
Alosa sapidissima Spawning conditions Spawning release American shad in the St. Johns river are batch spawners Multiple
Alosa sapidissima Spawning conditions Parity Iteroparous or semelparous Iteroparous