Hydrocleys nymphoides (water poppy), an aquatic plant native to South America, has been recorded as invasive on several continents (Europe, Australia and Asia). Here we report on the first known naturalized population in South Africa, in a dam in the KwaZulu-Natal (KZN) Midlands region, near the town of Howick. This population, first detected and identified in 2009, had by the end of the 2013 summer season occupied 1.8ha (30% of the dam). Surveys of 34 surrounding water bodies during the period between 2012 and 2013 did not result in detection of any new populations. The only other population (0.1 ha) was recorded growing in cultivation at the Durban Botanic Gardens. This note reports on the history of H. nymphoides in South Africa, details its current and potential distribution, looks at the risk it poses, and outlines plans for nation-wide eradication.
The present work aimed to obtain precise data on the catch of the purse seine net operating at daytime from sunrise till noon in Abu Qir Bay during 1997 and 1998. Sardine, anchovy, mullet and rabbitfish were recorded as the main target fish groups. Twenty-seven species were recorded as by-catch species. Catch per unit effort was estimated to be 93 kg/day/boat. The percentage of each target species in the catch and its length frequency distribution were presented. The length range of by-catch species and the season of catch were recorded. Daytime purse seine in Abu Qir Bay is an effective method but should regulated by directing the fishing to deeper waters outside the bay rather than the inshore coastal area to conserve many economic species of this important fishery.
Qarun Lake is a closed salty basin located about 90km southern Cairo Egypt, cover an area of 230km 2 with annual production of about 3000 tonnes. The present study assessed the lake fishery for better management purpose. Data, information and samples were collected through 42 field trips and 311 fishermen interviews during fishing season (2010-2011). The lake was divided into three sub-areas, east, middle and west. It was found that the fishing gears used in the lake were; 1-Trammel nets with four types differed in their dimensions, mesh sizes and mainly targeting Mugil cephalus, Tilapia zillii, Solea spp. and Liza spp. 2-Seine nets with three types that were targeting M. cephalus, anchovy and shrimp. 3-Others fishing methods (Fishing aggregation system, traps and hooks) targeting mainly T. zillii. For each gear and methods used, the species composition (target and by-catch) and catch per unit effort were estimated according to sub-area and season. It is realized that middle area was more productive with higher species diversity. The present study recommends prohibiting traps in spring and all seine nets except Gahzl Zardina during summer in west and improving the fish catch and effort statistics for sustainable management of this valuable resource.
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