|
Investigation on the abundance, composition and catch in Mongoft artificial reef and its Control site in Bushehr Waters
|
Abdolrahim Vosoughi   , Parisa Nejat Khah Manavi , Reyhaneh Ghane , Meisam Salehi |
| North Tehran Branch, Islamic Azad University |
|
|
Abstract: (6267 Views) |
| The present study was carried out during autumn and winter 2009-2010 in the Mongoft area (Bushehr waters). In both seasons two fishing methods, trap and hand-lining were used. The samples were carried to the laboratory. The samples were identified and their quantity and weights (gr) were recorded. Some biological indices such as diversity and evenness and species richness were calculated by using the Shannon and Simpson indices, Evenness and Margalef and Menhinich indices. PRIMER (v5) software was used for data analyses. In both seasons, the number of caught species at the artificial reef was more than those of control site. In autumn 62 specimens with trap and 13 specimens with hand-line were caught, where in control site 22 specimen with pot and 13 specimen with hand-line were caught. In winter, 15 and 36 specimens were caught with trap and hand line respectively , while in control site 13 specimens with trap and 9 specimens with hand-line were caught. In autumn, catch per unit effort (CPUE) (gr/t/d for traps and gr/h/h for hand-lining) at the artificial reef (with trap 46(gr/t/d) and with hand-line 599(gr/h/h)) was higher than the control site (with trap 14(gr/t/d) and with hand-line 442(gr/h/h)). In winter, CPUE (gr/t/d) at the artificial reef (45(gr/t/d)) was higher than the control site (35(gr/t/d)) but CPUE (gr/h/h) in control site (114(gr/h/h)) was greater than the artificial reef that (35(gr/h/h). Biological indices of diversity, evenness and species richness at the artificial reef in autumn showed better results in comparison with the control site but at the winter under catching with trap ,artificial reef had better condition in comparison with control site but about the amount of catch by hand-line, the similar condition were observed in both regions. Therefore, in autumn the artificial reef with respect to the abundance, diversity, composition and catch was in a better condition with respect to the control site, but the results were not significantly different (P≥0.05). In winter in both regions, in spite of having the differences the same results have been observed. |
|
| Keywords: Species richness, Composition, Catch, Mongoft Artificial Reef, Bushehr Waters, Persian Gulf |
|
|
Full-Text [PDF 1460 kb]
(2235 Downloads)
|
Type of Study: Research |
Subject:
Special
Received: 2014/02/6 | Accepted: 2014/02/6 | Published: 2014/02/6
|
|
|
|
|
|
|
| Send email to the article author |
|
|
|
| Add your comments about this article |
|
|
|
