Survey on Organic Matter Accumulation in the Anzali Lagoon Sediments
Sh.
Nezami
author
M.
Khodaparast
author
text
article
1996
per
Organic matter was determined in different parts of lagoon sediments during three years with annual average Of 137.32 ± 28.60 milligram in one gram dried sediment. Seasonal and horizontal fluctuations range was very clear and varied between maximum amount in emergent macrophytes region (in March, 250.00 mg/g. d.w.sed.) and minimum value in river systems (in September, 152.25 mg/g. d.w.sed.). This high organic matter is best reason for eutrophication process with regard to huge concentration of emerge, floating and submerge plants as a pollutant negative factor in spite of Caspian Sea's water level. Allochthonous matter from eleven important rivers and Authochthonous matter within lagoon during biological activities has main role in appearance of high eutrophy and it's need one scientific solution for this problem......
Iranian Scientific Fisheries Journal
Agricultural Research,Education and Extension Organization
1026-1354
5
v.
2
no.
1996
1
10
https://isfj.areeo.ac.ir/article_116293_7e0ad2860ee9aaa652aa7d1c5727ebca.pdf
dx.doi.org/10.22092/isfj.1996.116293
Survey of Diplostomiasis in Sturgeon Fingerling
A.
Ghoroghi
author
text
article
1996
per
In parasitologic survey on sturgeon fish in Shahid-Beheshti farm, the metacercaria of Diplostomum spathaceum were seen in the lens of fish fingerlings. The prevalence of infestation was 22 percent. The infestation with this parasite was one of the reasons of body lose weight and mortality. Observations showed that the ratio of the body weight loses directly depend on the number of metacercaria. During the study two different family of intermediate hosts include; Limneidae and Physidae were identified. The frequency of Physidae is more than Limneidae......
Iranian Scientific Fisheries Journal
Agricultural Research,Education and Extension Organization
1026-1354
5
v.
2
no.
1996
11
22
https://isfj.areeo.ac.ir/article_116294_d20360fa21ca15a43480c519add40f29.pdf
dx.doi.org/10.22092/isfj.1996.116294
Pearl oyster farming in the coastal water of Bandar-Lengeh (north Persian Gulf)
A.
Jahangard
author
text
article
1996
per
A Number of adult pearl oyster Pinctada radiata were investigated. They were divided in to three groups for nucleous implantation: spherical, half and blanc (no implantation) in Bandar-Lengeh. Oyster’s panels were hung on line in 3 meter depth. Over the following 5 months, heavy mortality occurred and over 90% of implanted oysters died. The analyses of variance (ANOVA) showed no significance difference in the rate of mortality. Major aspects of mass mortality could be: the high silt load of the farm, infestation of fouling and boring organisms and the surgical operation......
Iranian Scientific Fisheries Journal
Agricultural Research,Education and Extension Organization
1026-1354
5
v.
2
no.
1996
23
36
https://isfj.areeo.ac.ir/article_116295_a027c8dc3bb2d314605dd0832ea99e8d.pdf
dx.doi.org/10.22092/isfj.1996.116295
A preliminary study on ulcerative skin lesions in Sea - Caged Grouper (Epinephelus coioides)
R.
Peyghan
author
F.
Esmaeili
author
J.
Moazedi
author
text
article
1996
per
A low incidence mortality (15%) was observed in sea-caged grouper (Epinephlus coioides) in the Persian Gulf (Mahshahr, Khouzestan) following introducing the fishes to the cages in December 1993. Clinically, the affected fish showed multiple-round Skin lesions, penetrating to the underlying muscles, ulceration of jaws, fin and tail rot and opacity of eyes. Results of bacteriological study indicated that the organism isolated from the lesion belonged to the genera Pasteurella, Aeromonas and Streptococcus. Treatment of infected fishes with Halamid (N.sodium-N-chloroparatoluene sulphonamide) at 8 mg/lit for one hour of tank water as bath, together with topical cleaning of lesions by Betadin solution resulted in improving of the condition. Mechanical damage and improper water exchange suspected to be the predisposing factors for occurrence of the condition......
Iranian Scientific Fisheries Journal
Agricultural Research,Education and Extension Organization
1026-1354
5
v.
2
no.
1996
37
42
https://isfj.areeo.ac.ir/article_116296_c55e4d8eef597f90f38c1a55d514b2af.pdf
dx.doi.org/10.22092/isfj.1996.116296
Hydrology and hydrobiology of the Haraz River
M.
Roshantabari
author
text
article
1996
per
The Haraz River (Sorkh roud) is situated in geographical long (52 ֯ 21 – 51 ֯ 21) and width (33 ֯ .26 - 36 ֯ .42). The area of watershed in lithosphere is 4045 km2. The water of river is supplied by surface water and underground water. The maximum of water debit occur in April and May. The water of Haraz River were used for irrigation of the most part of rice field. The survey showed that the value of oxygen is adequate for aquatic in throughout, and the pH is very weak alkaline and perhaps the weakest alkaline. The aquatic plants of river included four groups such as water side meadow; marginal plant, floating plant and submerged plant (weeds). The phytoplankton of river consist of 4 phylum, 21 families and 33 genus, also 7 order and 2 class or benthic organisms was identified. The river fishes belong to 20 species and 8 families. The fishes are populated of 30 percent immigrant and 70 percent native fish......
Iranian Scientific Fisheries Journal
Agricultural Research,Education and Extension Organization
1026-1354
5
v.
2
no.
1996
43
63
https://isfj.areeo.ac.ir/article_116297_b58dccff36e0ffbb0ae3f64168d537be.pdf
dx.doi.org/10.22092/isfj.1996.116297