STUDY OF ENVIRONMENTAL SAFETY OF DRIFT NET FOR SARDINELLA CATCHING
Journal Title: Вестник Астраханского государственного технического университета. Серия: Рыбное хозяйство - Year 2014, Vol 0, Issue 2
Abstract
The drift net is one of the most used fishing gear in Benin. It is easy to use and requires very little energy. The net has high interselectivity for ground fish that gives mixed results in many regions. Physical impact of drift nets on the seabed is not a matter of concern. The ecological risk from interselectivity of the net is also insignificant and mainly occurs as a result of their abundant usage, for example, by the artisanal fishermen deployed in the area of fishing during the strong sea conditions. The purest, in terms of ecology, nets are gillnets for the sardinella catching, which are placed at 10 cm deep below the surface with numerous floats. They drift freely under the influence of the water current or with the boats if they are moored. The old model of the net is used as an ecologically pure drift net at 12 to 20 m deep with a length of 360–400 meters per a set. A fisherman can deploy about 4–5 sets of sardinella nets. Madeiran sardinella (Sardinella maderensis) is the most widespread sardinella species in Benin continental shelf. Round sardinella are very few in the catch. The fishing objects are generally called sardinella. Fishing nets are called Sardinella nets. The number of fishes for the old kind of net varied from 120 to 600 fishes per 3.5 kg, and for the new model – 40 fishes per 5 kg. The fisherman's annual revenue increases from 2500 to 3000 CFA francs (Financial collaboration of the Countries of the Central Africa) while using the old kind of net and to 4000 CFA francs when using the new one. Respect of this selectivity participates in renewal of the stock.
Authors and Affiliations
Sohou Zacharie , Hinvi Lambert Cloud , Guidi Tognon Clotilde , Semassou Clarence , Fiogbe Emile Didier
Keywords
Related Articles
- EP ID EP110640
- DOI -
- Views 132
- Downloads 0
БИОЛОГИЧЕСКИ АКТИВНЫЕ ДОБАВКИ В ПРОДУКЦИОННЫХ КОРМАХ ДЛЯ ОСЕТРОВЫХ ПОРОД РЫБ
По мере перехода рыбоводства на промышленную основу на первый план выступают проблемы, связанные с техногенным воздействием новых биотехнологий на организм выращиваемых рыб. Это предполагает глубокое изучение не только р...
COMPARATIVE ANALYSIS OF INFLUENCE OF pH ON THE LEVEL OF THE ACTIVITY OF DIGESTIVE ENZYMES OF RUSSIAN STURGEON, SIBERIAN STURGEON AND THEIR HYBRID BY MEANS OF NONMETRIC MULTIDIMENSIONAL SCALING
The pH impact on some digestive enzymes of the intestinal mucous tunic of Rrussian sturgeon, Siberian sturgeon and their hybrid ROLO is examined. The influence of the pH on α-amylase, maltase, alkaline phosphatase and ca...
SYSTEM APPROACH TO EVALUATION OF WAYS OF RAW FISH DEFROSTING
The results of experimental and theoretical studies of technological systems in view of the system approach are presented. The generalized coefficients of subsystems for a variety of ways of raw fish defrosting are found...
ВЛИЯНИЕ МАГНИТНОЙ БУРИ НА ТЕМПЕРАТУРНЫЕ ХАРАКТЕРИСТИКИ ПИЩЕВАРИТЕЛЬНЫХ ГЛИКОЗИДАЗ У СЕГОЛЕТОК ПЛОТВЫ
Изучены отдаленные последствия действия типичной магнитной бури (продолжительно-стью 24 часа, в диапазоне частот 0–5 Гц) на активность гликозидаз в кишечнике 4-месячной молоди плотвы Rutilus rutilus (L.). Экспозиции в ма...
ВЛИЯНИЕ ТЕМПЕРАТУРЫ И рН НА УРОВЕНЬ АКТИВНОСТИ ПИЩЕВАРИТЕЛЬНЫХ ФЕРМЕНТОВ РУССКОГО ОСЕТРА
Исследованы адаптации ферментов слизистой оболочки кишечника русского осетра к факторам среды (температура и рН). Показано, что температурный оптимум для щелочной фосфатазы находится в диапазоне значений температуры 60...