Selectivity and effectiveness of different gillnet mesh sizes used in ranau lake of Sumatra
Journal Title: Journal of Biodiversity and Environmental Sciences (JBES) - Year 2014, Vol 5, Issue 5
Abstract
Ranau Lake, the second biggest lake in Sumatra Indonesia, is inhabited by various freshwater fishes. The local people depend largely on fish resources for their life and use gillnet fishing gear for their fishing activity. The current research focused on selectivity and effectiveness of different gillnet mesh sizes as a tool to fisheries plan management in the lake. Research was carried out in twelve times of direct observation on fishing activity within two days per month from March to October 2013 and February to May 2014. The gillnets used for experimental fishing were constructed with seven different of mesh sizes such as: 3.5, 3.0, 2.5, 2.0, 1.75, 1.5, 1.25 inch. Total catch from each piece of gillnet, was recorded from five to ten selected fishers. Fish samples were collected for species identification and for length and weight measurement. Fish identification was done by comparing the morphometry and merystic characters of the sample to reference books. Results show that different gillnet mesh sizes succeeded to catch about 17 species of fish. As selective fishing gears, gillnet seems to be size selective rather than species selective. Gillnet mesh sizes are correlated negatively with the number of fish catch. The smaller mesh size succeeded to catch relatively high amount of fish, but the gear tends to be not selective. For sustainable fish utilization, it suggests that larger gillnet mesh sizes (> 2.0 inch) were encouraged to be used by the fishermen.
Authors and Affiliations
Dina Muthmainnah, Makri, Subagdja, Dwi Atminarso, Sevi Sawestri, Safran Makmur
Keywords
Related Articles
- EP ID EP38033
- DOI -
- Views 143
- Downloads 0
Responses of Typha latifolia subjected to metal stress.
In order to preserve the quality of the waste water, we use the macrophyte plants, which go in the direction of the phyto-purification of an aquatic ecosystem. These purifying plants cleanse the water and transform the o...
Spatial distribution of two gill monogenean species from Sarotherodon melanotheron (Cichlidae) in man-made Lake Ayamé 2, Côte d’Ivoire
This study describes the spatial distribution of two monogenean species, Cichlidogyrus halinus and C. halli on the gills of Sarotherodon melanotheron from man-made Lake Ayamé 2. A total of 96 S. melanotheron were sampled...
AMMI and AMMI based analysis of phenotypic stability in wheat-agropyron disomic addition lines
In order to identify QTLs controlling yield stability in Agropyron using AMMI and AMMI based stability statistics an experiment was conducted in three environments. Combined analysis showed significant genotype × envir...
A comparative identification and species characteristics of aquatic macrophytes for dry and rainy seasons of the floodplains of river Benue at Makurdi
An survey experiment was conducted during the dry (March- April) and the rainy seasons (June-August) of 2013 in the floodplains of River Benue in the streams, ponds, main drainage channels and marshy areas within Makur...
Determination of effectiveness of berberine, a characteristic phytochemical of Berberis species, against human proteome using in-silico analysis
Berberis spp. are important representative plants of Family Berberidaceae. Berberis pseudumbellata subsp. gilgitica and Berberis brandisiana are found in Central Karakorum National Park (CKNP) and rest of GilgitBaltista...