Inland Waters Aquaculture Institute

Iran

Inland Waters Aquaculture Institute

Iran
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Mertens K.N.,Ghent University | Bradley L.R.,University of Liverpool | Takano Y.,Institute for East China Sea Research ECSER | Mudie P.J.,Geological Survey of Canada | And 12 more authors.
Quaternary Science Reviews | Year: 2012

Reconstruction of salinity in the Holocene Black Sea has been an ongoing debate over the past four decades. Here we calibrate summer surface water salinity in the Black Sea, Sea of Azov and Caspian Sea with the process length of the dinoflagellate cyst Lingulodinium machaerophorum. We then apply this calibration to make a regional reconstruction of paleosalinity in the Black Sea, calculated by averaging out process length variation observed at four core sites from the Black Sea with high sedimentation rates and dated by multiple mollusk shell ages. Results show a very gradual change of salinity from ∼14 ± 0.91 psu around 9.9 cal ka BP to a minimum ∼12.3 ± 0.91 psu around 8.5 cal ka BP, reaching current salinities of ∼17.1 ± 0.91 psu around 4.1 cal ka BP. The resolution of our sampling is about 250 years, and it fails to reveal a catastrophic salinization event at ∼9.14 cal ka BP advocated by other researchers. The dinoflagellate cyst salinity-proxy does not record large Holocene salinity fluctuations, and after early Holocene freshening, it shows correspondence to the regional sea-level curve of Brückner et al. (2010) derived from Balabanov (2007). © 2012 Elsevier Ltd.


Bagheri S.,Inland Waters Aquaculture Institute | Niermann U.,Marine Ecology | Mansor M.,Universiti Sains Malaysia | Yeok F.S.,Universiti Sains Malaysia
Journal of the Marine Biological Association of the United Kingdom | Year: 2014

The mesozooplankton of the south-western Caspian Sea, off Anzali, sampled from 1996-2010, had undergone severe changes, especially after the year 2001, when the invasive ctenophore Mnemiopsis leidyi bloomed for the first time. Native species vanished or decreased, while invasive species such as Pleopis polyphemoides, Acartia tonsa, M. leidyi and the larvae of Balanus sp., plus Hediste diversicolor dominated the zooplankton. It could be stated that the increasing amount of nutrients since the early 1980s led to a decrease of endemic species and smoothed the way for opportunistic invader species, which outcompeted and depleted the endemic species in their turn. However, the major changes in the zooplankton community and possibly the blooming of M. leidyi during 2001-2002 were triggered by changing weather patterns, when a period with heavy rain at the end of the 1990s was followed by a prolonged drought (2001-2002). It is not clear to what extent M. leidyi was responsible for the disappearance of endemic Copepoda and Cladocera species such as Eurytemora grimmi, Limnocalanus grimaldii, Cercopagis pengoi, and Polyphemus exiguous, because the mesozooplantic invader species seemed to be more successful competitors than the endemic Caspian Sea fauna. Compared with other areas of the Caspian Sea, the development of the M. leidyi stock was moderate in the area under investigation. Mnemiopsis leidyi numbers and biomass increased from the beginning of sampling in 2001 to about 600A n.m-3 and 40-60A g wet weightA m-3 until 2003. Since then the stock oscillated in this range until 2010. © 2013 Marine Biological Association of the United Kingdom.


Bagheri S.,Inland Waters Aquaculture Institute | Turkoglu M.,Canakkale Onsekiz Mart University | Abedini A.,Inland Waters Aquaculture Institute
Turkish Journal of Fisheries and Aquatic Sciences | Year: 2014

This study concentrated on temporal distribution and species composition of phytoplankton connected with physicochemical variations between January 2003 and November 2004 in the South Western Caspian Sea. During the study, 75 phytoplankton were distinguished in total and average phytoplankton densities in 2003 and 2004 were 1.47×105±6.05× 104and 1.97×105±7.18×104 cells L-1, respectively. Contributions of diatoms (66.0% in 2003; 57.0% in 2004) and cyanophytes to total phytoplankton (17.0 in 2003; 36.0% in 2004) were higher than any other group. Diatoms Dactyliosolen fragilissimus and Thalassionema nitzschioides, and cyanophytes Oscillatoria sp. and Anabeanopsis raciborskii provided the biggest contributions to the total phytoplankton. Average DIN concentration in 2003 was higher (3.86±1.65 μM) than the average in 2004 (3.37 ± 1.13 μM). However, average DIP concentration in 2003 was lower (1.45±1.37 μM) than the average in 2004 (1.99 ± 0.67 μM). Average DIS concentration was two-fold higher than average DIN concentration. Average DIN:DIP without NH4 (2.66 ± 1.66 in 2003; 1.69 ± 1.17 in 2004) and DIS:DIP ratios (5.61±3.44 in 2003; 3.93±2.49 in 2004) were clearly lower than Redfield ratios. Nutrient ratios and phytoplankton densities revealed that system was eutrophic © Published by Central Fisheries Research Institute (CFRI) Trabzon, Turkey.


Fallah F.J.,Islamic Azad University at Lahijan | Khara H.,Islamic Azad University at Lahijan | Roohi J.D.,Inland Waters Aquaculture Institute | Boorani M.S.,Inland Waters Aquaculture Institute
Comparative Clinical Pathology | Year: 2014

The purpose of this study was to assess of some hematological parameters of Esox lucius collected from Anzali wetland from fall 2010 to summer 2011. Variations in hematological parameters such as hematocrit (Ht), hemoglobin concentration (Hb), erythrocyte (RBC) and leukocyte (WBC) counts, mean cell volume (MCV), mean cell hemoglobin (MCH), mean cell hemoglobin concentration (MCHC), lymphocytes, monocytes, neutrophils, and eosinophils of fish were compared according to age and seasonal differences. Analysis of variance showed significant differences in values of white blood cell (WBC), red blood cell (RBC), MCV, MCH, lymphocytes, monocytes, and eosinophils between ages. Statistical analysis revealed significant differences in RBC and WBC between all seasons. However, there were no significant differences in Ht, Hb, MCHC, MCH, MCV, neutrophils, lymphocytes, monocytes, and eosinophils between all seasons. Results of current study may be helpful in establishing a hematological data bank for this species including standard values of blood parameters. © 2013 Springer-Verlag London.


Bagheri S.,Universiti Sains Malaysia | Bagheri S.,Inland Waters Aquaculture Institute | Mansor M.,Universiti Sains Malaysia | Turkoglu M.,Canakkale Onsekiz Mart University | And 2 more authors.
Journal of the Marine Biological Association of the United Kingdom | Year: 2012

This study focuses on spatial and temporal distribution and species composition of phytoplankton in the south-western Caspian Sea between July 2009 and March 2010. Samples were collected from 11 stations along three transects: Lisar, Anzali and Sefidrood. Among 44 identified phytoplankton species, diatoms (70.2%) and cyanophytes (25.0%) were dominant. The average phytoplankton abundance was calculated as 1.085E+05 cells l-1. Among the phytoplankton groups, diatom density was higher (70.2%) than two out of three of total abundance in density of 1.085E+05 cells l-1. Cyanophytes were the second important group (25.0%) contributing to total phytoplankton. Dinoflagellates, chlorophytes and euglenoids were other contributors to total phytoplankton. Diatoms Dactyliosolen fragilissimus and Skeletonema costatum and cyanophyte Oscillatoria sp. numerically dominated in the system. There were major changes in phytoplankton composition and average phytoplankton density was higher than those documented in 1996-1997 and 2005. The average concentrations of dissolved inorganic nitrogen (DIN), dissolved inorganic phosphorus (DIP) and dissolved inorganic silicate were 14.5±6.32, 1.14±0.44 and 5.10±3.98μM, respectively, and these concentrations were strikingly high. Increases in DIN and DIP concentrations were more than twofold compared to recorded values during the last 2 decades due to the eutrophication. Fluctuations in nutrients played an important role in the variation of phytoplankton composition and abundance. Chlorophyll-a concentrations varied between 3.22 and 16.1 μg l-1 and there was a significant increase in chlorophyll-a (8.13±5.72 μg l-1) compared to the values in 1996-1997 (1.44±1.48 μg l-1), 2001 (2.62±1.48 μg l-1) and 2005 (2.14 ±1.94 μg l-1). © 2012 Marine Biological Association of the United Kingdom.


Bagheri S.,Universiti Sains Malaysia | Bagheri S.,Inland Waters Aquaculture Institute | Mansor M.,Universiti Sains Malaysia | Wan Maznah W.O.,Universiti Sains Malaysia | Negarestan H.,Iranian Fisheries Research Organization
Proceedings of the International Offshore and Polar Engineering Conference | Year: 2010

The study was conducted from January 2008 to December 2008, focused on spatial and temporal distribution of Mnemiopsis leidyi and zooplankton populations in the south-western area of the Caspian Sea. In summer and winter M. leidyi abundance and biomass values were between 1900 ± 1400 ind/m 2, 110 ± 220 ind/m 2 and 370 ± 250 g/m 2, 1.0 ± 1.3 g/m 2, respectively. The most individuals of a ctenophore (about 90%) were < 5 mm in length. A total of 19 zooplankton species were identified. Among them seven species were merozooplankton and 12 species were holozooplankton. The annual mean zooplankton abundance was recorded 5300 ± 1400 ind/m 3 which were lower than the previous years. The mass occurrence of M. leidyi appears to be one of the most important factors that reduce the zooplankton species and abundance, hence degrade the Caspian Sea natural ecosystem. Copyright © 2010 by The International Society of Offshore and Polar Engineers (ISOPE).


Bagheri S.,Inland Waters Aquaculture Institute | Bagheri S.,Universiti Sains Malaysia | Mansor M.,Universiti Sains Malaysia | Turkoglu M.,Canakkale Onsekiz Mart University | And 3 more authors.
Ekoloji | Year: 2012

This study, accomplished is focused on the spatial and temporal distribution and species composition of phytoplankton in the southwestern Caspian Sea between January 2008 and December 2008. Samples were collected from 11 stations along three transects known as Lisar, Anzali and Sefidrood. This study identified 43 phytoplankton species comprised of diatoms (25 species), dinoflagellates (7 species), chlorophytes (6 species), cyanophytes (4 species), and euglenoids (1 species) were identified. The study showed, diatom Dactyliosolen fragilissimus and the dinofllagelate Prorocentrum cordatum numerically dominate the southwestern Caspian Sea. The annual average phytoplankton density was calculated as 2.35E+04 ± 1.63E+04 Cell L-1, with the maximum value recorded in the winter (4.50E+04 ± 3.90E+04 Cell L-1). Diatoms were dominant during the autumn and winter (77.0% and 96.0%, respectively), while dinoflagellates were prevalent during the spring and summer (89.0% and 86.0%, respectively). The annual average chlorophyll a was calculated as 9.26±3.54 μg L-1, with the maximum values were recorded in the winter (16.9±5.60 μg L-1). This is supported by the Spearman rank correlation result between phytoplankton abundance and chlorophyll a (r=0.551). The high phytoplankton cell density and chlorophyll a concentration coincided with the poor species composition.


Bagheri S.,Inland Waters Aquaculture Institute | Niermann U.,Marine Ecology | Sabkara J.,Inland Waters Aquaculture Institute | Mirzajani A.,Inland Waters Aquaculture Institute | And 2 more authors.
Iranian Journal of Fisheries Sciences | Year: 2012

Mnemiopsis leidyi which was accidentally introduced into the Caspian Sea in 1999 and since then has colonized extensively. The horizontal distribution of M. leidyi and dominant mesozooplankton species was investigated in the south western Caspian Sea during February, May, July and November 2008. The average number and biomass of M. leidyi were in the same range (ca 200 individuals.m-3 (2000 ind.m-2) and 16 g wet weight.m -3 (180 g.m-2) in comparison with previous surveys. As in previous years the population consisted mainly of individuals <1 cm. The decline in mesozooplankton species observed since 1996 continued in 2008. Only two species of the previously recorded 24 Cladocera species were found in 2008. Of five Copepoda species recorded in 1996, only one, Acartia tonsa, was found in 2008 and even here adult individuals have reduced 3-fold since 1996. Bivalve larvae have declined by one order of magnitude since 1996. Among the dominant species, only the numbers of Cirripedia larvae and in part the numbers of Pleopis polyphemoides (Cladocera) were in the same range as in 1996.


PubMed | Islamic Azad University at Lahijan and Inland Waters Aquaculture Institute
Type: Journal Article | Journal: Journal of parasitic diseases : official organ of the Indian Society for Parasitology | Year: 2015

This study involved 120 pike, Esox lucius, captured from Anzali wetland. Parasite fauna were identified in captured fish. Also, changes of haematological parameters were compared both infected and uninfected fish. Parasitological inspections revealed the following infestations: Skin: Lernea cyprinacea, Argulus foliaceus (Crustacean) and Tricodina sp. (Ciliatea). Gill: Dactylogyrus sp. (Digenea) and Tetraonchus monenteron (Monogenea). Eye: Diplostomum spathaceum (Digenea). Gut: Eustrongylides exises, Rhipdocotyle illense, Raphidascaris acus (Nematode), Corynosoma Strumosum (Acanthocephala). Most prevalence and intensity were related to Eustrongylides exises and Rhipdocotyle illense. Following haematological parameters were evaluated: haematocrit, haemoglobin concentration, erythrocyte and leukocyte counts, mean cell volume (MCV), mean cell haemoglobin, mean cell haemoglobin concentration lymphocytes, monocytes and eosinophils. Significant difference was found for MCV between infected and uninfected fish.


PubMed | Islamic Azad University at Lahijan and Inland Waters Aquaculture Institute
Type: Journal Article | Journal: Journal of parasitic diseases : official organ of the Indian Society for Parasitology | Year: 2016

A total of 120

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