Fisheries in Yonki Reservoir, Papua New Guinea

A year after Yonkl Reservoir (Eastern Highlands Province, Papua New Guinea) had been completed, a su1wy was conducted among people found fishing at the shore. Rod and line was used in 99% of the reported fishing trips. On an average 0.42 kg of fish was caught per person per trip. The average catch per hookhour was 0. 033 kg of the past fishing trips, and 0. 021 kg of the on-going fishing trips. The first half of the year during which interviews were conducted the catch was composed only of Cyprinus carpio and Oreochromis mossambicus. In mid-1992 Tilapia rendalli appeared in the catch, and six months later this species was responsible for 48% of the weight of the dally catch. The total catch from the reservoir for the year 1992 was estimated al 40.2 tons

The Artisanal fishery in the Sepik-Ramu catchment area, Papua New Guinea

A survey in 25 villages in the Sepik-Ramu basin revealed that fishing was practised in all villages surveyed. The participation in catching fish decreased from 42% of the population of villages situated below 200 m altitude to 23.4% of villages al altitudes above 1,000 111, 111ain(v as a result of the lower involvement in fishing of women and girls at higher altitudes. Females contributed half of the estimated total fish yield of respondents living below 100 m. altitude, and 33% of the annual total yield of the whole catchment, which was estimated at 8,200 tons. At high (>1000 m) and middle altitude (200 - 1000m above sea level) most villages had only access to creeks or small rivers. At low altitudes (<200 m above sea level) most villages surveyed had access to big rivers, swamps or lakes. Average yield/person/trip with various gears and in various waters are reported. Eels Anguilla spp and Cyprinus carpio dominated the catch of respondents living at high altitude levels. At low altitude levels half of/he catch consisted of Oreochromis mossambicus. This species plus C. carpio contributed 42% of the weight of the total catch of the Sepik-Ramu area. The part of the fishing respondents that believed that the exotic species C. carpio and/or O. mossambicus had affected the numbers of native fish species decreased with increasing altitude level. At the high altitude Gobiidae were often mentioned to have decreased in number after the arrival of C. carpio

Een zelfgebouwd recirculatiesysteem in Egypte

In Aquacultuur nr 6, 2007, beschreef Bert-Jan Roosendaal het Egyptian Aquaculture Centre, een commerciële tilapiakwekerij annex opleidingscentrum van dr. Ismail Radwan. Deze man, die voor de ontwikkeling van de tilapiateelt in Egypte van groot belang was en is, heeft ook deelgenomen aan een korte cursus over visteelt in recirculatiesystemen en aan een studiereis langs enkele Nederlandse viskwekerijen die beide door Wageningen International zijn georganiseerd. Tijdens een recent bezoek aan zijn bedrijf konden we zien hoe de in Nederland opgedane kennis door dr. Radwan in praktijk wordt gebrach

Проблемні питання принципів кримінального права

На основі загальнотеоретичних положень висвітлюються питання розмежування понять «кримінальне законодавство» і «кримінальне право», визначаються підходи щодо формування принципів правової системи України та системи галузевих принципів кримінального законодавства і права, формулюється визначення їх понять.На основании общетеоретических положений освещаются вопросы разграничения понятий «уголовное законодательство» и «уголовное право», определяются подходы относительно формирования принципов правовой системы Украины и системы отраслевых принципов уголовного законодательства и права, формулируются определения их понятий.On the basis of general theoretical statements the author addresses the issue of distinguishing criminal legislation from criminal law, finds approaches to defining principles of the law system of Ukraine and the system of branch principles of criminal legislation, formulates the definitions

Наші презентації

Using criminal population criminal conviction history information, prediction models are developed that predict three types of criminal recidivism: general recidivism, violent recidivism and sexual recidivism. The research question is whether prediction techniques from modern statistics, data mining and machine learning provide an improvement in predictive performance over classical statistical methods, namely logistic regression and linear discriminant analysis. These models are compared on a large selection of performance measures. Results indicate that classical methods do equally well as or better than their modern counterparts. The predictive performance of the different techniques differs only slightly for general and violent recidivism, while differences are larger for sexual recidivism. For the general and violent recidivism data we present the results of logistic regression and for sexual recdivisim of linear discriminant analysis

TGS: Aquaponics promotie in binnen- en buitenland

In Renkum, vlak bij het voormalige industrieterrein in het Renkumse Beekdal dat is 'verbouwd'tot een nieuw, nat natuurgebied, bevindt zich het kantoor van Transition Grant Services. TGS is een bedrijf dat zich richt op ondersteuning van lokale iniatieven om ondernemerschap in ontwikkelingslanden te stimuleren en helpt bij het opzetten en begeleiden van de projecten en met het zoeken van investeerders en financiers. Een tak van hun activiteiten richt zich op het zoeken en ondersteunen van partners die in het opzetten van aquaponicssystemen geinteresseerd zijn. Aquaponics zijn recirculatiesystemen waarin zowel vis als groenten of siergewassen in een systeem worden geteeld