T. Ghanbari; R. Abdi; M. Bahmani; R. Kazemi; A. Savari
Volume 3, Issue 4 , July 2015, , Pages 1-8
Abstract
Abstract In this study, cartilage tissue of vertebral column and dorsal fin of 40 days, 70 days, one and 4 years old of Persian sturgeon after preparation were fixed in buen fixative. Then rutin procedure of histology examination were done and paraffin blocks cut at 6 microne and then stained ...
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Abstract In this study, cartilage tissue of vertebral column and dorsal fin of 40 days, 70 days, one and 4 years old of Persian sturgeon after preparation were fixed in buen fixative. Then rutin procedure of histology examination were done and paraffin blocks cut at 6 microne and then stained with H&E, Safranin-O and Verhoff staining. In photomicrographs were compared cell structure and compounds of substance grounds in cartilage tissues. It showed that perichondrium layer of dorsal fin was more advanced from perichondrium layer of vertebral column and their componants were different. Microscopic masurement of two cartilage tissue showed the cells of dorsal fin were larger than the cells of vertebral column but in cells number,decrised with physiological maturation. Comparative study of volume of extracellular matrix and number of isogenous groups by SPSS software showed that growth of cartilage tissue of vertebral column was interstitial but in dorsal fin was appositional.
Farzaneh Fazeli; Ahmad Savari
Volume 3, Issue 3 , May 2015, , Pages 55-61
Abstract
Abstract The threadfin breams of the genus Nemipterus are commercially important in many parts of the world; therefore, stock parameters such as age, growth and mortality have been examined to manage them properly.The growth parameters of Nemipterus japonicus were studied by using length frequency ...
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Abstract The threadfin breams of the genus Nemipterus are commercially important in many parts of the world; therefore, stock parameters such as age, growth and mortality have been examined to manage them properly.The growth parameters of Nemipterus japonicus were studied by using length frequency data of 763 specimens of this species that were collected monthly by trawl net from Khuozestan Coastal during Jun 2005 to May 2006.FiSAT II program was used to again Pauly regression and their equation, to determine the growth parameters. The Pauly equation indicated L∞= 254.06 for female and 270.42 for male fishes respectively.ELEFAN I program was used to catch Length- Frequency curve and amount of K parameter, K estimated 0.684 and 0.546 in male and female respectively.After gain amount of L∞ and K parameters, by used of this data and FiSAT II program, estimated Natural and Total mortality and with this data Fisheries mortality was calculate. Natural mortality was 0.8 and 0.6 and Total mortality calculated, 2.97 and 1.99 in male and female respectively. Finally Fisheries mortality was 2.17 and 1.39 in male and female respectively.
