Some biological aspects of Thunnus albacares and Katsuwonus pelamis in Oman Sea (Sistan-o-Balochestan Province)
Some biological aspects of yellowfin and skipjack tuna according to catch data of traditional gillnet fisheries were studied in the north of Oman Sea during 1997-99. Based on Gonadosomatic Index (GSI) results, the spawning period or yellowfin begins in spring and reaches to the peak level in May-Jun...
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| Format: | Article |
| Language: | fas |
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Iranian Fisheries Research Organization
2001-01-01
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| Series: | Majallah-i ̒Ilmī-i Shīlāt-i Īrān |
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| Online Access: | http://isfj.areo.ir/article_115601_en.html |
| _version_ | 1818766027172872192 |
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| author | A. Hossieni |
| author_facet | A. Hossieni |
| author_sort | A. Hossieni |
| collection | DOAJ |
| description | Some biological aspects of yellowfin and skipjack tuna according to catch data of traditional gillnet fisheries were studied in the north of Oman Sea during 1997-99. Based on Gonadosomatic Index (GSI) results, the spawning period or yellowfin begins in spring and reaches to the peak level in May-June.
For skipjack tuna, in addition to the above mentioned spawning period, the other observed period was found in autumn-winter with a peak in January-February. The first length or maturity (LM50%) of yellowfin and skipjack tuna females were estimated 76 and 61 cm, respectively.
Observation of stomach contents showed that squid was the major components of diet for yellowfin and fish for skipjack tuna.
A comparison between mean length of different years and landing sites using two-way analysis of variance indicated a significant differences,
The length-weight equations showed an algometric growth in tuna and isometric growth in skipjack. |
| first_indexed | 2024-12-18T08:27:27Z |
| format | Article |
| id | doaj.art-1ab5e395d798407abcace8089df6a6e7 |
| institution | Directory Open Access Journal |
| issn | 1026-1354 2322-5998 |
| language | fas |
| last_indexed | 2024-12-18T08:27:27Z |
| publishDate | 2001-01-01 |
| publisher | Iranian Fisheries Research Organization |
| record_format | Article |
| series | Majallah-i ̒Ilmī-i Shīlāt-i Īrān |
| spelling | doaj.art-1ab5e395d798407abcace8089df6a6e72022-12-21T21:14:34ZfasIranian Fisheries Research OrganizationMajallah-i ̒Ilmī-i Shīlāt-i Īrān1026-13542322-59982001-01-011113562Some biological aspects of Thunnus albacares and Katsuwonus pelamis in Oman Sea (Sistan-o-Balochestan Province)A. HossieniSome biological aspects of yellowfin and skipjack tuna according to catch data of traditional gillnet fisheries were studied in the north of Oman Sea during 1997-99. Based on Gonadosomatic Index (GSI) results, the spawning period or yellowfin begins in spring and reaches to the peak level in May-June. For skipjack tuna, in addition to the above mentioned spawning period, the other observed period was found in autumn-winter with a peak in January-February. The first length or maturity (LM50%) of yellowfin and skipjack tuna females were estimated 76 and 61 cm, respectively. Observation of stomach contents showed that squid was the major components of diet for yellowfin and fish for skipjack tuna. A comparison between mean length of different years and landing sites using two-way analysis of variance indicated a significant differences, The length-weight equations showed an algometric growth in tuna and isometric growth in skipjack.http://isfj.areo.ir/article_115601_en.htmlThunnus albacares; Katsuwonus pelamis; Feeding habits; Oman Sea; Iran |
| spellingShingle | A. Hossieni Some biological aspects of Thunnus albacares and Katsuwonus pelamis in Oman Sea (Sistan-o-Balochestan Province) Majallah-i ̒Ilmī-i Shīlāt-i Īrān Thunnus albacares; Katsuwonus pelamis; Feeding habits; Oman Sea; Iran |
| title | Some biological aspects of Thunnus albacares and Katsuwonus pelamis in Oman Sea (Sistan-o-Balochestan Province) |
| title_full | Some biological aspects of Thunnus albacares and Katsuwonus pelamis in Oman Sea (Sistan-o-Balochestan Province) |
| title_fullStr | Some biological aspects of Thunnus albacares and Katsuwonus pelamis in Oman Sea (Sistan-o-Balochestan Province) |
| title_full_unstemmed | Some biological aspects of Thunnus albacares and Katsuwonus pelamis in Oman Sea (Sistan-o-Balochestan Province) |
| title_short | Some biological aspects of Thunnus albacares and Katsuwonus pelamis in Oman Sea (Sistan-o-Balochestan Province) |
| title_sort | some biological aspects of thunnus albacares and katsuwonus pelamis in oman sea sistan o balochestan province |
| topic | Thunnus albacares; Katsuwonus pelamis; Feeding habits; Oman Sea; Iran |
| url | http://isfj.areo.ir/article_115601_en.html |
| work_keys_str_mv | AT ahossieni somebiologicalaspectsofthunnusalbacaresandkatsuwonuspelamisinomanseasistanobalochestanprovince |