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Stock assessment of the Adriatic anchovy [Engraulis encrasicolus L.] using egg surveys

100%

Dulcic J.

Acta Ichthyologica et Piscatoria

1993

tom 23

nr 1

69-76

The results of anchovy stock assessment during surveys in periods 1976-1984 and 1989-1990 are given. The influence of the curves of spawning intensity on the error in stock assessment is also discussed. During the periods of surveys it was observed that anchovy stock was decreasing. Estimates using the batch fecundity method show that anchovy stocks were highly overestimated because their fecundity was underestimated. It is obvious that in future surveys in the Adriatic, the batch fecundity methods has to be applied.

Estimate of spawning biomass of anchovy, Engraulis encrasicolus, in the eastern part of Adriatic from 1989 to 1990 by means of egg surveys

80%

Dulcic J., Cetinic P.

Acta Ichthyologica et Piscatoria

1993

tom 23

nr 2

67-76

The objective of the study was to present the results of anchovy stock assessment for one period (1989-1990) of surveys and to estimate maximum sustainable yield on the basis of the estimated spawning biomass. Anchovy stock has not been fully exploited during that period but was decreasing and affected by long term fluctuations in biomass.

Ograniczanie wyników

2 Acta Ichthyologica et Piscatoria

2 Dulcic J.

1 Cetinic P.

2 1993

Wyniki wyszukiwania

Stock assessment of the Adriatic anchovy [Engraulis encrasicolus L.] using egg surveys

Estimate of spawning biomass of anchovy, Engraulis encrasicolus, in the eastern part of Adriatic from 1989 to 1990 by means of egg surveys