Indian squid, Uroteuthis duvauceli, is an important commercial marine fauna in the coastal waters of Oman Sea

• Main Author: Smiee, Keivandokht
• Format: Thesis
• Language: Persian
• Published: Islamic Azad University, Science and Research Branch, Tehran, Marine Biology 2008
• Subjects: Biology; Ecology; Fisheries; Indian; DML
• Online Access: http://hdl.handle.net/1834/34441

About 3600 specimens were collected by bottom trawl at 15sampling stations.24 biometric characters were measured for each specimens atthe laboratory. Microscopic cross – sections of statolith wereused for age determination. Sex determination and fecunditywere determined. Population dynamics parameters as well asstock as stock assessment including cohort analysis wereestimated using FISAT software. The findings showed thatDorsal Mantle Length (DML) and Body weight (BW) of theIndian squid were 133.9 ± 0.78 mm and 99.61 ± 0.95 grespectively. Strong correlation was found between these 2variables (R2 = 0.90). The maximum age was 5 years.Relationship between DML and age was highly significantlyof p ≤ 0.05.Overall sex ratio (M: F = 0.52) was significantly differentfrom the expected 1:1 ratio (p ≤ 0.05).The ovary weight and nidamental glands weight were 7.72 ±0.0006 g and 3.07 ± 0.0003g respectively. Absolute andrelative fecundity of the Indian squid were found to be 122733± 30.87 and 2348 ± 0.4 respectively. GSI were 14.35 in Apriland 8.63 in July. This squid is therefore a spring spawner. Theinfinite dorsal mantle length were 258.62 mm for females,194.72 mm for males and 252.02 for both sexes respectively.For population growth and mortality parameters; K (0.65 peryear for both sexes, 0.85 per year for males, 0.65 per year forfemales); t0 (0.24year for both sexes, 0.22 year in females,0.26 year in male); φ` (2.30 in both sexes, 2.47 for males, 2.37for females); Z (1.17 per year for both sexes, 1.10 per year infemales, 1.39 per year, in males); M (0.70 per year for bothsexes, 0.90 for males, 0.67 for females); F(0.27 per year forboth sexes, 0.27 per year in males, 0.195 per year in females).Exploitation coefficient were 0.51 per year for both sexes,0.57 per year males and 0.51 per year females respectively.The results indicates that since the Indian squid is a short liveaquatic organism, therefore, the exploitation coefficient couldbe raised to 0.7 per year. The analysis showed that totalbiomass and MSY were 10103.5 ton ...