On the life cycle of Penaeus semisulcatus (Crustacea, Decapoda, Penaeidae) in the Persian Gulf

Abstract. The Persian Gulf Water and Red Sea Water are salty and dense waters recirculating at subsurface in the Gulf of Oman and the Gulf of Aden respectively, under the influence of mesoscale eddies which dominate the surface flow in both semi-enclosed basins. In situ measurements combined with altimetry indicate that the Persian Gulf Water is driven by mesoscale eddies in the form of filaments and submesoscale structures. In this paper, we study the formation and the life cycle of intense submesoscale vortices and their impact on the spread of Persian Gulf Water and Red Sea Water. We use a three-dimensional hydrostatic model with submesoscale-resolving resolution to study the evolution of submesoscale vortices. Our configuration is an idealized version of the Gulf of Oman and Aden: a zonal row of mesoscale vortices interacting with north and south topographic slopes. Intense submesoscale vortices are generated in the simulations along the continental slopes due to two different mechanisms. The first mechanism is due to frictional generation of vorticity in the bottom boundary layer, which detaches from the topography, forms an unstable vorticity filament, and undergoes horizontal shear instability that leads to the formation of submesoscale coherent vortices. The second mechanism is inviscid and implies arrested topographic Rossby waves breaking and forming submesoscale coherent vortices where a mesoscale anticyclone interacts with the topographic slope. Submesoscale vortices subsequently drift away, merge and form larger vortices. They can also pair with opposite signed vortices and travel across the domain. They can weaken or disappear via several mechanisms, in particular fusion into the larger eddies or erosion on the topography. Particle patches are advected and sheared by vortices and are entrained into filaments. Their size first grows as the square root of time, a signature of the merging processes, then it increases linearly with time, corresponding to their ballistic advection by submesoscale eddies. On the contrary, witout intense submesoscale eddies, particles are mainly advected by mesoscale eddies; this implies a weaker dispersion of particles than in the previous case. This shows the important role of submesoscale eddies in spreading Persian Gulf Water and Red Sea Water.

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Mercury contamination in some marine biota species from Khuzestan shore, Persian Gulf

Toxicology and Industrial Health ◽

10.1177/0748233714555392 ◽

2014 ◽

Vol 32 (7) ◽

pp. 1302-1309 ◽

Cited By ~ 8

Author(s):

Mehdi Hosseini ◽

Seyed Mohammad Bagher Nabavi ◽

Yaghoob Parsa ◽

Maryam Saadatmand

Keyword(s):

Persian Gulf ◽

Mercury Contamination ◽

Marine Biota ◽

Portunus Pelagicus ◽

Penaeus Semisulcatus ◽

Barbus Grypus ◽

Musa Estuary ◽

North Part ◽

Acanthopagrus Latus ◽

The Persian Gulf

In this study, concentrations of mercury (Hg) were analyzed in some marine biota species (fish, shrimp, and crab) from Khuzestan shore, north part of the Persian Gulf. It was also our intention to evaluate potential risks to human health associated with seafood consumption. The results indicated that concentrations of Hg in the fish and crustacean were different among the species and tissues. Liver in fish and hepatopancreas in crustacean exhibited higher Hg concentration than the other tissues. The highest concentration of Hg was detected in Acanthopagrus latus liver (1.37 µg/g), followed by Labeo rohita (0.87 µg/g), Johnius belangerii (0.79 µg/g), and Barbus grypus (0.69 µg/g), respectively. Also the highest Hg concentrations were detected in shrimp species, Penaeus semisulcatus hepatopancreas (0.95 µg/g), followed by blue crab Portunus pelagicus (0.76 µg/g) and Metapenaues affinis (0.64 µg/g), respectively. The comparison indicated that benthic species were more contaminated than were other pelagic species. The results indicated that highest concentrations of Hg between different stations were detected in Musa estuary. The Hg concentration in all species were low than standards, expect in A. latus and P. semisulcatus collected from Musa estuary (S4). The variation in Hg levels among the species is likely to have resulted from metal bioavailability, changes in tissue composition, habitat,s and locations.

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Observations on the Infection of the Shrimp, Penaeus semisulcatus, by Epipenaeon elegans in the Persian Gulf

Journal of Parasitology ◽

10.2307/3274711 ◽

1958 ◽

Vol 44 (2) ◽

pp. 240 ◽

Cited By ~ 6

Author(s):

C. E. Dawson

Keyword(s):

Persian Gulf ◽

Penaeus Semisulcatus ◽

The Persian Gulf

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Reproductive biology of the green tiger prawn (Penaeus semisulcatus) in coastal waters of Bushehr, Persian Gulf

ICES Journal of Marine Science ◽

10.1093/icesjms/fsn172 ◽

2008 ◽

Vol 65 (9) ◽

pp. 1593-1599 ◽

Cited By ~ 12

Author(s):

Nassir Niamaimandi ◽

Arshad Aziz ◽

Daud Siti Khalijah ◽

Saed Che Roos ◽

Bahram Kiabi

Keyword(s):

Reproductive Biology ◽

Coastal Waters ◽

Persian Gulf ◽

Reproductive Output ◽

Minimum Size ◽

Penaeus Semisulcatus ◽

Spawning Stock ◽

Tiger Prawn ◽

The Persian Gulf ◽

Sexually Mature

Abstract Niamaimandi, N., Aziz, A., Siti Khalijah, D., Che Roos, S. and Kiabi, B. 2008. Reproductive biology of the green tiger prawn (Penaeus semisulcatus) in coastal waters of Bushehr, Persian Gulf. – ICES Journal of Marine Science, 65: 1593–1599. The reproductive cycle of the green tiger prawn (Penaeus semisulcatus) was investigated in the coastal waters of Bushehr, Iran, Persian Gulf, from January 2003 to March 2004, with the aim of determining spawning seasons, durations, and locations in those waters. Bushehr waters are one of the main fishing grounds for P. semisulcatus in the Persian Gulf. Spawning peaks between December and March, but there is also some spawning in October. The minimum size at maturity was 24 mm carapace length (CL), and 50% were mature at 40 mm CL. The proportion of females that mated increased sharply above this size (40 mm), with 90% of females sexually mature at 54 mm CL. Spawning took place in a limited part of the study area, mostly offshore. Overexploiting the spawning stock could result in reduced reproductive output, limiting fishery production.

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