Fecundidad del Dorado (Coryphaena Hippurus Linneo, 1758) en el Pacifico Suroriental, durante Septiembre 2008 a Junio 2009

Abstract

The fecundity of dolphinfish (Coryphaena hippurus) was estimated at 312 specimens considered macroscopically as mature captured by the Ecuadorian long line fleet in the Southeastern Pacific during September 2008 to June 2009.

For the batch fecundity estimation were counted alone the hydrated oocytes ≥ 999,8 microns (μm) of diameter within the gonad.

The distribution of frequency of diameters of the 62.088 oocytes taken out of the 312 samples of gonad, presented two modal groups; a smallest modal group of 100 to 900 μm corresponding to 16,41% considered as oocytes not hydrated, another more advanced group between 1.000 and 2.000 μm of diameter, that understands 51.014 units ovum considered as hydrated that it corresponds 83,59% of the total of oocytes analyzed, whose range of carvings go between 999,8 to 1.999,5 μm of diameters ( ̅ = 1.455, 7 ± 1,66 μm), which were considered to estimate the batch fecundity.

The results obtained show ranges between 17.499 and 801.960 oocytes ( ̅ = 219.997 ± 17.023 oocytes), for females with ranges from 56 to 170 centimetres (cm) of total length ( ̅ = 106,3 ± 2,67 cm) and the total weight with range from 908 to 15.890 grams (g) ( ̅ X= 5.717, 6 ± 544,16 g).

The relationship between batch fecundity (F) and the total length (Lt, cm), batch fecundity (F) and the total weight (Wt, g) was expressed by the potential equations:

F = 23,52Lt1,920 r2 = 0,391

F = 104,5Wt^0,883 r2 = 0,567.

There a significant difference in the bath fecundity average of fishes captured in the provinces Esmeraldas, Manabí and Santa Elena (north, middle and south of the Ecuador) (P < 0,05).