Efficiency of Different Traps and Baits for Catching Freshwater Prawn Macrobrachium Spp. for Broodstock Development

Catching of wild freshwater prawns in Palawan is done by using different fishing gears, including baited traps. However, there are only limited studies related to the efficiency of these traps on catching freshwater prawns. In this study, the efficiency of four different traps (traditional plastic traps, bamboo traps, modified traps, and rattan traps) and three baits (low-valued fish, grilled coconut, and octopus) was tested in catching live Macrobrachium spp. from the rivers of two localities in the Barangay Bagongbayan, Roxas and Sitio Catama, Dumaran, Palawan at two sampling events with 12-hr intervals along the river bank. Each trap was deployed randomly 5-8 meters apart in the collection site late afternoon and retrieved the following day. The highest catch was obtained using plastic traps with low-value fish as bait. All samples from the different traps were collected alive. Modifications are underway to improve the design of these traps to improve catch efficiency. Regulating the collection of Macrobrachium from the wild by developing it into broodstocks will support the sustainable aquaculture industry using hatchery-produced seedstocks instead of sourcing it from the wild.

Comparative Analysis Between Sampling Methods for Immature Mosquitoes in an Atlantic Forest Fragment in Brazil

ABSTRACT In this study, traps were set out to improve mosquito monitoring, study their viability, and determine the most suitable traps for female mosquito species of epidemiological importance during oviposition. The effectiveness of 3 types of traps (bamboo traps, tire traps, and ovitraps) were compared at 2 sampling sites. A total of 24 traps were installed on the ground at elevations of 3 m, 6 m, and 9 m in a fragment of the Atlantic Forest in the municipality of Nova Iguaçu, Rio de Janeiro State, Brazil. The samplings took place every 2 wk from July 2017 to June 2018. A total of 1,854 mosquitoes belonging to 16 different species were identified, of which 2 species are involved in the transmission of arbovirus: Haemagogus leucocelaenus (Dyar and Shannon) and Aedes albopictus Skuse. Larval tire traps were the most effective at trapping females laying eggs, followed by ovitraps. The results were consistent with the usual habitats of certain species that were found in tire traps, which are artificial objects commonly found in human environments.

PRODUCTION FACTORS OF AN ARTISANAL FISHERY ON A MANMADE LAKE IN COTE D’IVOIRE

Fisheries management involves, among other things, knowledge of the actors and the catching gear used. These data are generally absent in the fisheries of Côte d'Ivoire. However, there is a strong fishing activity. To lead this study, surveys were conducted among fishermen and fishery administrators. The study of fishing activity in the area of Dioulabougou (Côte d’Ivoire, West Africa) in the district of Bouaflé done from November 2013 to February 2014 identified 88 fishermen. This population is composed of ivorians (39.77%) and foreigners (60.23%). The fishing activity is led by malians (Bambara ethnic group): 34.1%. Baoulé ethnic group (29.54% of ivorian fishermen) is the greatest ethnic group of ivorians. Two categories of fishermen stand in the fishing activity. We registered professional fishermen whose job is only fishing (84.1%) and professionals with another activity (4.5%). The fishing activity in Dioulabougou is dominated by adult aged more than 45 years (48%). Fishermen are predominantly illiterate at 42.04%. The fishing techniques used at Dioulabougou are conical fishing baskets (mesh and trunk of ronier), bamboo-traps, gillnets, bottom lines and shore seines. The illiterate situation of fishermen isa serious matter for sustainable management on fish’s resources.

Effect of rodenticides and traps against lesser bandicoot rat,(Bandicota bengalensis) in rice field

An investigation was carried out at Regional Agricultural Research Station (RARS), Titabor and Instructional-Cum- Research Farm, Assam Agricultural University, Jorhat during 2013-14 and 2014-15 in boro and sali season respectively. The field trials were conducted to evaluate effectiveness by combining rodenticides with local bamboo traps against field rodents in rice. Combined effect of rodenticides and traps were evaluated at different growth stages of rice against Bandicota bengalensis in terms of live burrow count (LBC/ha), trapping index (TI) as well as per cent cut tillers in both boro and sali rice, respectively. Baiting with bromadiolone (0.005%) at panicle initiation stage and bamboo traps at milky stage recorded the highest reduction in rodent population (72.39% LBC/ha, 70.57% TI and 68.13% cut tillers) in boro and (72.27% LBC/ha, 77.13% TI and 70.77% cut tillers) in sali rice over control at harvesting stage. The second best treatment in respect of per cent reduction of LBC/ha, trap index and cut tillers was bamboo traps at maximum tillering stage and bromadiolone (0.005%) at panicle initiation stage in both boro and sali rice, respectively which recorded a reduction of 65.89% LBC/ha, 66.19% TI and 65.66% cut tillers in boro rice and 68.33% LBC/ha, 71.04% TI and 62.83% tiller damage in sali rice

Ghost fishing pada perikanan bubu di Perairan Sario Tumpaan Teluk Manado Provinsi Sulawesi Utara

ABSTRACT Fish trap made of bamboo is one of the common fishing gears used by fishermen in reef waters, due to its simple in construction, relatively inexpensive and easy to operate. If this trap got lost, however, it will give impact on fish mortality, with respect to ghost fishing. This study aims to determine the impact of ghost fishing traps to fish resources in Sario Tumpaan waters of Manado Bay; based on the descriptive method. Three units of bamboo traps placed in the bottom waters at a depth of about 6 m, and then observed by divers every day for a month. The impact of ghost fishing in the traps that have a net volume of 0.22 m3 was 4 fish per day, or 18 fish per day in traps that have a net volume of 1 m3. Keywords: ghost fishing, maximum catch, traps, Manado Bay ABSTRAK Bubu yang terbuat dari bambu merupakan salah satu alat tangkap yang umum digunakan oleh nelayan untuk menangkap ikan di perairan karang, karena konstruksinya sederhana, relatif murah dan mudah dioperasikan. Tetapi jika alat ini hilang, maka akan memberikan dampak mortalitas ikan, sehubungan dengan ghost fishing. Penelitian ini bertujuan untuk mengetahui dampak bubu yang bersifat ghost fishing terhadap sumberdaya ikan, di perairan Sario Tumpaan Teluk Manado; yang didasarkan pada metode deskriptif. Tiga unit bubu bambu dipasang di dasar perairan pada kedalaman sekitar 6 m, kemudian dikunjungi oleh penyelam setiap hari selama sebulan. Dampak ghost fishing pada bubu yang mempunyai volume bersih sebesar 0.22 m3 adalah 4 ekor ikan per hari, atau 18 ekor ikan per hari pada bubu yang mempunyai volume bersih 1 m3. Kata-kata kunci: ghost fishing, tangkapan maksimum, bubu, Teluk Manado

The Moray Eel Fishery in the Seagrass Beds of Siquijor Island, Central Philippines, with Remarks on Two New Philippine Records of the Genus Gymnothorax

In this paper, the researchers document for the very first time in detail the moray eel capture fishery in the seagrass beds of Siquijor Island, Central Philippines. The process of deploying the bamboo traps, gathering of baits, andcatch-per-unit effort (CPUE), income-per-unit effort (IPUE), and the possible impact of an increasing number of moray eel fishers are also discussed. The researchers noted a very low average CPUE of 1.32±0.19 S.E. kg/person/hr and a corresponding Income-per-unit effort (IPUE) of 59.75±9.9 S.E.. Philippine Pesos/person/hour. Sustainable fishing practices of catching moray eels are also highlighted. Apparently, two new records of muraenid eels of the Genus Gymnothorax for the Philippines are also briefly annotated. Keywords - Fishery, Moray eel, Catch Assessment, Siquijor Island, Philippines, Southeast Asia