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Showing 2 results for Bony Fish
F Shahab Moghadam , A Esmaeili Sari , T Valinassab, M Karimabadi,
Volume 19, Issue 2 (7-2010)
Abstract
We assessed concentration of heavy metals (Cu, Fe, Hg and Zn) in the muscular tissue of benthic species Himantura gerrard and pelagic species Selar crumenophthalmus caught from the Persian Gulf during winter 2008. After biometrical measurements, the muscle tissues of 51 randomly selected samples were separated from 86 stations. Specimens were digested using the wet method and the concentrations of Cu, Fe and Zn were determined using Atomic Absorption Spectrophotometer (flame method) and also concentration of mercury was determined using Mercury Analyzer device. The mean concentration of heavy metals in muscle tissues of Himantura gerrardi were as follows: Fe: 74.78; Hg: 0.77; Zn: 875.99 and Cu: 3.5. However, these values for muscle tissues of Selar crumenophthalmus were: Fe: 25.07; Hg: 0.20; Cu: Zn: 15.54 and Zn: 2.31f.lglg dry weight. Results showed that concentration of the selected heavy metals in H gerrardi, were significantly higher than S. crumenophthalmus (P O.OS).
M. Ghanbarzadeh , N. Mahboobi Soofiani , Y. Keivany , S. Asadollah , S.a. Taghavi Motlagh ,
Volume 21, Issue 4 (1-2013)
Abstract
Age and growth of the king soldier bream, Argyrops spinifer (Forsskal 1775) in the Persian Gulf (Bushehr coasts) were investigated. A total of 622 samples were obtained from June 2010 to May 2011. Total length (TL) of fish ranged from 13.5 to 64.2cm (females) and 15 to 61.2cm (males). Male and female fish age ranged between 2+ to 25+ and 2+ to 21+ years, respectively. Values of the von Bertalanffy growth function were calculated in females, males and total population by using the backcalculation method and otolith reading data. The values of these parameters according to otolith reading data were K=0.061, L∞=82.10cm (TL), t0=- 2.39 years for females and K=0.082, L∞=67.90cm (TL), t0= - 2.88 for males and K=0.065, L∞=75.50cm (TL), t0=-3.21 for total population and according to backcalculation method were K=0.088, L∞=76.37cm (TL), t0=-0.329 years for females and K=0.101, L∞=65.71cm (TL), t0=-0.168 for males and K=0.094, L∞=74.55cm (TL), t0=-0.191 for total population. The results of the study provide the direction for the future management models for the continued sustainable exploitation of this species in the Persian Gulf region.
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