Towards spatial management of fisheries in the Gulf: benthic diversity, habitat and fish distributions from Qatari waters
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As with many other regions in the world, more complete information on the distribution of marine habitats in the Gulf is required to inform
environmental policy, and spatial management of fisheries resources will require better understanding of the relationships between habitat
and fish communities. Towed cameras and sediment grabs were used to investigate benthic habitats and associated epifauna, infauna and fish
communities in the central Gulf, offshore from the east coast of Qatar, in water depths of between 12 and 52 m. Six different habitats were
identified: (i) soft sediment habitats of mud and (ii) sand, and structured habitats of (iii) macro-algal reef, (iv) coral reef, (v) mixed reef, and
(vi) oyster bed. The epibenthic community assemblage of the mud habitat was significantly different to that of sand, which in turn differed
from the structured habitats of coral reef, mixed reef and oyster bed, with the macroalgal assemblage having similarities to both sand and the
other structured habitats. Fish assemblages derived from video data did not differ between habitats, although certain species were only associated
with particular habitats. Epibenthic diversity indices were significantly lower in mud, sand and macro-algal habitats, with no differences
recorded for fish diversity. Soft sediment grab samples indicated that mud habitats had the highest benthic diversity, with Shannon-Weiner
values of>4, and were more diverse than sand with values of 3.3. The study demonstrates high biodiversity in benthic habitats in the central
and southwestern Gulf, which may in part be due to the absence of trawling activity in Qatari waters. There is a strong influence of depth on
benthic habitat type, so that depth can be used to predict habitat distribution with a high level of accuracy. The presence of outcrops of hard
substrata creates a mosaic of patchy shallow structured benthic habitat across extensive areas of the offshore seabed. Such heterogeneity, and
the association of commercially exploited fish species with specific habitats, indicates that this region is well suited to a spatial approach to
fisheries management.
Original language | English |
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Pages (from-to) | 178-189 |
Number of pages | 12 |
Journal | ICES Journal of Marine Science |
Volume | 75 |
Issue number | 1 |
Early online date | 27 Jul 2017 |
DOIs | |
Publication status | Published - 1 Jan 2018 |
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