علوم زیستی دریا
Dariush Mohammadi kia; Ahmad Savari; Babk Dostshenas; Hossein Mohammad Asgari
Abstract
Plankton survey in coastal area of Southern Waters Qeshm was carried out in two season cold and warm and four stations (Parke Zeyton Beach, Soza Beach, Shibdraz Beach and Salakh Beach) during 2015 and 2016. In this study phytoplankton species belonging to 4 order Bacillariophyceae (Diatoms),Dinophyceae ...
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Plankton survey in coastal area of Southern Waters Qeshm was carried out in two season cold and warm and four stations (Parke Zeyton Beach, Soza Beach, Shibdraz Beach and Salakh Beach) during 2015 and 2016. In this study phytoplankton species belonging to 4 order Bacillariophyceae (Diatoms),Dinophyceae (Dinofellagelates), Chlorophyceae and Cyanophceae (blue-green algae) were identified. phytoplankton identification was done until genus and 31 ditoms, 11 from dinofllagelates, 6 from Chlorophyceae and 4 genus from cyanophyceae were identified.The mean (± SE) of density, biodiversity indices of Simpson,Pielo Shannon and Margalef were respectively 6705.72±63.9 Cell/L, 0.82±0.34,1.12±0.17 , 1.9±0.19, and 2.61±0.38 in season warm and 5666.13±53.2 Cell/L, 0.77±0.06, 1.12±0.11 , 1.9±0.17 and 2.26±0.43 in season cold.The seasonal similarity based on Sorensen's and Jaccard's coefficients were highest (0.97 and 0.88) for - two season warm and cold. In addition, there were significant correlation between Simpson and Shannon-Weiner diversity with salinity and PO4, and phytoplankton density with salinity and pH. A ccording to the results obtained can be concluded that both the area of ecological conditions in ranks are instead moderate. Also, phytoplankton of diversity and richness is good.
d m; e k; m t
Abstract
Some biological characteristics and population dynamic of Platycephalus indicus were studied during one year from May 2011 to March 2012 in the coastal waters of Bandar Abbas. A total of 1106 samples were collected. Also, each month 35 fish was choosen and transferred to the laboratory for evaluation ...
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Some biological characteristics and population dynamic of Platycephalus indicus were studied during one year from May 2011 to March 2012 in the coastal waters of Bandar Abbas. A total of 1106 samples were collected. Also, each month 35 fish was choosen and transferred to the laboratory for evaluation of spawning season.The ages of 279 specimens were determined by sectioned otoliths. The ages of the females were estimated to be between 1 to more than 7,while the ages of the males were from 1 to more than 4.The relationship between weight and length (Total length) can be expressed as W=0/004L3/16 35 for male and W = 0/0042L3/1293 for female.This equation hndicates that keeled mullet has isometric growth. The values for natural mortality (M) resultant coefficient were M = 0.886 year-1 for females and 0.736 year-1 for males, and the estimated Z values were 1.43 year-1 for females and 1.62 year-1 for males. The mean value of the gonadosomatic index (GSI) for males and females was 0.82 ± 0.25 and 2.477 ± 0.59 respectively in each year. The mean values of the hepatosomatic index (HIS) were 0.89 ± 0.20 for males and 1.28 ± 0.16 for females. The highest HSI values for this location were observed in January, and the lowest were in April.