Short communication:First report of cyclopoid copepods (oithonidae) from north-eastern Arabian Sea, Karachi, Pakistan

Compatibility of cyclopoid copepods with mosquito insecticides.

Larvivorous copepods (Macrocyclops, Mesocyclops and Acanthocyclops) were tested for their sensitivities to commonly used mosquito larvicides and adulticides. The cyclopoids were not harmed by Bacillus thuringiensis (H-14) (B.t.i.) or larviciding oil. Control of mosquito larvae in field trials was accelerated by applying B.t.i. at the same time cyclopoids were introduced to a breeding site. Amon...

Impact of marine pollution in green mussel Perna viridis from four coastal sites in Karachi, Pakistan, North Arabian Sea: histopathological observations.

Pathological changes are regarded as a standard technique to monitor the effects of pollutants in marine animals. Histopathological examination of the population of green mussel Perna viridis (L.) from four sites in Pakistan, namely, Manora Channel, Rehri Creek, Sandspit Backwaters and Bhanbore was conducted. The first three sites are on the Karachi coast, whereas the fourth one, Bhanbore is si...

Macrofaunal communities and sediment structure across the Pakistan margin Oxygen Minimum Zone, North-East Arabian Sea

(OMZ) during the 2003 intermonsoon (March–May) and late-post-monsoon (August–October) periods. Objectives were to compare patterns with those described from other OMZs, particularly the Oman margin of the Arabian Sea, in order to assess the relative influence of bottom-water oxygenation and sediment organic content on macrofaunal standing stock and community structure. Macrofaunal density was h...

Short communication:The first report of Asterodiscides fourmanoiri (Echinodermata: Asteroidea) from the North Coast of Oman Sea, Iran

Reproductive cycles of dominant calanoid copepods in the North Sea

The seasonal cycles of reproduction of the dominant copepods Acartia clausi, Temora longicornis, Centropages hamatus, C. typicus and Pseudocalanus spp. were studied at Helgoland Roads, southern North Sea. Egg production rate, clutch size, number of spawning females and prosome length were compared with temperature and phytoplankton concentration. Female A. clausi, T. longicornis and Pseudocalan...