علوم زیستی دریا
Nasim Parniyan; Leila Abdoli; Asghar Abdoli
Abstract
A study was conducted to determine food habits brown trout (Salmo trutta), 63 specimen (42 males and 21 females) were caught using an electrofishing in January 2016. The range of total Length for males were 10.3-17.0 cm and for females 10.4-19.3 cm. Weight of males and female were the range of 8.1- 46.1 ...
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A study was conducted to determine food habits brown trout (Salmo trutta), 63 specimen (42 males and 21 females) were caught using an electrofishing in January 2016. The range of total Length for males were 10.3-17.0 cm and for females 10.4-19.3 cm. Weight of males and female were the range of 8.1- 46.1 g and 8.05-76.12 g respectively. After counting and identifying the contents of the stomach, four prey, Trichoptera, Ephemeroptera, Plecoptera and Diptera were identified, with Trichoptera with 37.60% and Diptera with 52.24% having the highest relative frequency. According to Castello, the brown trout 's feeding strategy was general and the predominant prey was Trichoptera, and female specimens use Trichoptera exclusive. The mean Shannon index of male and female were 1.26 and 1.12, respectively, and there was no significant difference between the mean Shannon index of male and female. The mean Evenness index for males and females were 0.95 and 0.81, respectively, but there was no significant difference between the mean Evenness index in male and female. The relative gut Length (RLG) and diet composition of S. trutta suggests carnivore
علوم زیستی دریا
t a; asghar abdoli; b k
Abstract
Abstarct: Abstarct: Mudskipper species diversity in the Khur –e- Abee protected area in the coastal areas of the Persian Gulf in Hormozgan Province was studied monthly. Sampling was done from March 2011 to February 2012 is 56º 24' 58” E, 27º 11' 28” N geographical position. ...
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Abstarct: Abstarct: Mudskipper species diversity in the Khur –e- Abee protected area in the coastal areas of the Persian Gulf in Hormozgan Province was studied monthly. Sampling was done from March 2011 to February 2012 is 56º 24' 58” E, 27º 11' 28” N geographical position. 730 specimens belonging to 3 species and 1 family were catched. The fish specimens were captured by hand. Three species were identified; Boleophthalmus dussumieri, Scartelaos tenuis and Periophthalmus waltoni. The monthly sampling of mudskipper species composition showed that S. tenuis (45.75%), P. waltoni (30.48%) and B. dussumieri (26/02%) were first, second and the third in abundance respectively. Shannon species diversity (1.09), Simpson index (0.62) and Peilo species index (0.99) were highest in October. Margalef species richness (0.62) was highest in December.