Use of the daily egg production method to estimate the stock size of western Australian sardines (Sardinops sagax)

被引：25

作者：

Fletcher, WJ ^{[1
]}

Lo, NCH ^{[1
]}

Hayes, EA ^{[1
]}

Tregonning, RJ ^{[1
]}

Blight, SJ ^{[1
]}

机构：

[1] NATL MARINE FISHERIES SERV, NOAA, SW FISHERIES CTR, LA JOLLA, CA 92038 USA

来源：

MARINE AND FRESHWATER RESEARCH | 1996年 / 47卷 / 06期

关键词：

plankton; biomass; batch fecundity; spawning frequency;

D O I：

10.1071/MF9960819

中图分类号：

S9 [水产、渔业];

学科分类号：

0908 ;

摘要：

The daily egg production method was used to estimate the spawning biomass of the sardine Sardinops sagax in the Albany region of Western Australia. Plankton surveys covering 10000-14000 km(2) were completed in July of 1991 and 1992 in three to five days using up to three boats. Adult sardines were obtained from the local purse-seine fleet. The spawning area was similar in both years at approximately 3800 km(2) (1100 nmile(2)), but the number of eggs collected was larger in 1991 with egg production values of 6 . 5 per 0 . 05 m(2) day(-1) compared with 3 . 9 per 0 . 05 m(2) day(-1) in 1992. The average batch fecundity values were similar (approximately 11000 eggs female(-1)) as were the proportions spawning (0 . 13 in 1991; 0 . 09 in 1992). The calculated biomass estimates were 23121 t (CV = 0 . 51) and 16121 t (CV = 0 . 44) in 1991 and 1992 respectively.

引用

页码：819 / 825

页数：7

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