[صفحه اصلی ]   [Archive]  
:: صفحه اصلي :: درباره نشريه :: آخرين شماره :: تمام شماره‌ها :: جستجو :: ثبت نام :: ارسال مقاله :: تماس با ما ::
:: دوره 17، شماره 1 - ( 10-1396 ) ::
جلد 17 شماره 1 صفحات 137-150 برگشت به فهرست نسخه ها
Feeding habits and trophic level of Himantura gerrardi (Elasmobranchii; Dasyatidae) in northern Oman Sea: effects of sex and size class
چکیده:   (794 مشاهده)
The feeding habits and trophic level of Himantura gerrardi were studied according to sex and size classes of 80 individuals obtained using bottom trawl between May and December 2014 from the Oman Sea. Collected specimens were divided into three size classes (small<38 cm, medium 38-58 cm and large>58 cm) based on disk width. Prey was identified in seven main zoological categories, where crustacean and polychaetes were the dominant in diets, indicating this species is a demersal dwelling species. No significant differences were observed between sexes, but size classes showed significant differences in their diets. Also, results showed a decrease in feeding overlap between size classes with an increase in disk width, suggesting that intraspecific competition reduced, which allows the coexistence of different size classes. Trophic level was positively correlated with the disk width, which was lower than 4.0 for both sexes and different size classes, placing it in an intermediate trophic level.
متن کامل [PDF 711 kb]   (417 دریافت)    
نوع مطالعه: پژوهشي |
دریافت: ۱۳۹۶/۱۱/۳ | پذیرش: ۱۳۹۶/۱۱/۳ | انتشار: ۱۳۹۶/۱۱/۳
ارسال نظر درباره این مقاله
نام کاربری یا پست الکترونیک شما:

CAPTCHA code


XML   English Abstract   Print


Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Rastgoo A, Fatemi S, Valinassab T, Mortazavi M. Feeding habits and trophic level of Himantura gerrardi (Elasmobranchii; Dasyatidae) in northern Oman Sea: effects of sex and size class. IJFS. 2018; 17 (1) :137-150
URL: http://jifro.ir/article-1-3274-fa.html

Feeding habits and trophic level of Himantura gerrardi (Elasmobranchii; Dasyatidae) in northern Oman Sea: effects of sex and size class. مجله علوم شیلاتی ایران. 1396; 17 (1) :137-150

URL: http://jifro.ir/article-1-3274-fa.html



دوره 17، شماره 1 - ( 10-1396 ) برگشت به فهرست نسخه ها
مجله علوم شیلاتی ایران Iranian Journal of Fisheries Sciences
Persian site map - English site map - Created in 0.05 seconds with 30 queries by YEKTAWEB 3742