بررسي برخي از پارامترهاي رشد ماهي كيلكاي معمولي (Clupeonella cultriventris) در حوضه جنوبي درياي كاسپين

Study on Some Growth Parameters of Common Kilka (Clupeonella cultriventris) in South Part of Caspian Sea

در اﯾﻦ ﭘﮋوﻫﺶ، ﭘﺎراﻣﺘﺮﻫﺎي رﺷﺪ ﮐﯿﻠﮑﺎي ﻣﻌﻤﻮﻟﯽ )Clupeonella cultriventris( در درﯾﺎي ﮐﺎﺳﭙﯿﻦ در ﺳﻪ ﻣﻨﻄﻘﻪ ﺑﺎﺑﻠﺴﺮ، ﺑﻨﺪر اﻣﯿﺮآﺑﺎد و ﺑﻨﺪر اﻧﺰﻟﯽ در ﻓﺼﻞ ﺗﺎﺑﺴﺘﺎن 1398 ﻣﻮردﺑﺮرﺳﯽ ﻗﺮار ﮔﺮﻓﺖ. درﻣﺠﻤﻮع ﺗﻌﺪاد 300 ﻋﺪد ﻣﺎﻫﯽ ﺑﻪﺻﻮرت ﺗﺼﺎدﻓﯽ ﺗﻮﺳﻂ ﺗﻮرﻫﺎي ﻣﺨﺮوﻃﯽ ﻟﻨﺞﻫﺎي ﺻﯿﺎدي ﻣﻨﺎﻃﻖ ﻣﻮردﻣﻄﺎﻟﻌﻪ ﺻﯿﺪ و ﻣﻮرد ﺗﺠﺰﯾﻪوﺗﺤﻠﯿﻞ ﻗﺮار ﮔﺮﻓﺘﻨﺪ. ﻧﺘﺎﯾﺞ ﺑﻪدﺳﺖآﻣﺪه ﻧﺸﺎن داد ﮐﻪ درﻣﺠﻤﻮع ﻣﯿﺎﻧﮕﯿﻦ ﻃﻮل ﮐﻞ در ﺳﻪ اﯾﺴﺘﮕﺎه 11/65±1/17 ﺳﺎﻧﺘﯽﻣﺘﺮ و وزن ﮐﻞ 9/64±2/58 ﮔﺮم ﮐﻪ در اﯾﺴﺘﮕﺎه ﺑﺎﺑﻠﺴﺮ، ﺑﻨﺪر اﻣﯿﺮآﺑﺎد و ﺑﻨﺪر اﻧﺰﻟﯽ ﻣﯿﺎﻧﮕﯿﻦ ﻃﻮل ﮐﻞ ﺑﻪ ﺗﺮﺗﯿﺐ 12/48±0/97 ،11/64±0/99 و 10/81±0/91 ﺳﺎﻧﺘﯽﻣﺘﺮ و ﻣﯿﺎﻧﮕﯿﻦ وزن ﻧﯿﺰ ﺑﻪ ﺗﺮﺗﯿﺐ 11/2±11/20 ،10/2±07/41 و 7/73±1/84 ﮔﺮم ﺑﻮده و راﺑﻄﻪﻫﺎي ﻟﮕﺎرﯾﺘﻤﯽ ﻃﻮل و وزن ﻧﻤﻮﻧﻪﻫﺎ ﻧﯿﺰ ﺑﻪ ﺗﺮﺗﯿﺐ 3/2663-W=2/31TL-3/4378 ،W=2/2642TL و 3/5275-W=2/3331TL ﺑﻪ دﺳﺖ آﻣﺪ. در ﻣﻨﻄﻘﻪ ﺑﺎﺑﻠﺴﺮ، ﺑﻨﺪر اﻣﯿﺮآﺑﺎد و ﺑﻨﺪر اﻧﺰﻟﯽ ﻣﯿﺰان b ﺑﻪ ﺗﺮﺗﯿﺐ 2/31 ،2/26 و 2/33 ﺗﻌﯿﯿﻦ ﺷﺪ درﻧﺘﯿﺠﻪ اﻟﮕﻮي رﺷﺪ در ﻫﺮ ﺳﻪ اﯾﺴﺘﮕﺎه آﻟﻮﻣﺘﺮﯾﮏ ﻣﻨﻔﯽ )3

In this study, the growth parameters of Common Kilka (Clupeonella cultriventris) in the Caspian Sea were studied in one season and, three stations of Babolsar, Bandar Amirabad and Bandar Anzali. A total number of samples, 300 fish were randomly caught by conical nets in the study areas and analyzed. Overall, the average total length of the three stations 11.65 ± 1.17 cm and 9.64 ± 2.58 g total weight. The average total length at Babolsar, Bandar Amirabad, and Bandar Anzali stations were 11.64 ± 0.99, 12.48 ± 0.97 and 10.81 ± 0.91cm, respectively. The average weight at Babolsar, Bandar Amirabad, and Bandar Anzali stations was 10.07 ± 2.41, 11.11 ± 2.20 and 7.73 ± 1.84, respectively. The logarithmic relationship between length and weight of Babolsar, Bandar Amirabad, and Bandar Anzali stations, respectively, W= 2.2642 TL- 3.2663, W=2.31 TL- 3.4378 and W=2.3331 TL- 3.5275. The amount of b in the Babolsar, Bandar Amirabad and Bandar Anzali zone, were 2.26, 2.31 and 2.33, respectively. the growth pattern of fish in three stations is negative allometric(b<3). Factor conditions of common Kilka fish at Babolsar, Bandar Amirabad and Bandar Anzali stations were 3.88, 3.25 and 2.98, respectively. It showed that Common Kilkai fish were better in weight in the Behshahr station. The results showed that the living status was more suitable for common Kilka fish at Bandar Amirabad station than Babolsar and Bandar Anzali stations in the sampled season.