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net mesh size

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Journal Article
Aquatic Ecosystem Health & Management (2013) 16 (3): 322–328.
Published: 01 July 2013
... meeting in Dar es Salaam on 27 th February 2009 and harmonized regulations for R. argentea fishing in Lake Victoria. The resolution of the meeting allowed fishing for Dagaa at a distance of at least 2 km from the littoral to offshore using the 10 mm and above mesh sizes, while lower mesh nets were...
Journal Article
Aquatic Ecosystem Health & Management (2002) 5 (3): 245–254.
Published: 01 September 2002
... exploitation, including species introductions, invasive weeds, lake level rise, changes in water quality, and illegal fishing practices. These have influenced the way the fisheries have been managed. In the 1920s, measures existed to manage the fisheries of Lake Victoria. In those days, a minimum net mesh size...
Image
Published: 02 January 2014
Figure 3. Variation in total (a) and standard (b) lengths, of fish, in the mesh size (c), height (d) and length (e) of nets and in the number of hauls of nets per trip (g) and that of fishermen (f) per fishing unit according to littoral substrate type. (Color figure available online.) More
Journal Article
Aquatic Ecosystem Health & Management (2007) 10 (4): 381–391.
Published: 28 November 2007
... April, 2001 were also included. Two main methods are used to catch R. argentea and Caridina in the Tanzanian waters of Lake Victoria: mosquito seine nets (5 mm and 10 mm mesh sizes) and catamaran lift nets (8 mm mesh sizes). The majority of the beaches used mosquito seine nets as the main gear; lift net...
Journal Article
Aquatic Ecosystem Health & Management (2018) 21 (2): 152–158.
Published: 03 April 2018
... place measures that favor it. Most of the management measures in fisheries such as close-season, closed-area, minimum takeable sizes and cod-end mesh size as well as net mesh size regulations are all based on the manager's knowledge of the behavior and the biological characteristics of the species and...
Journal Article
Aquatic Ecosystem Health & Management (2015) 18 (1): 63–75.
Published: 02 January 2015
... sections and open circles on map represent locations of vertical net tows. Mysid layer is apparent at depths from 20 to 30 m as high backscatter. Nighttime vertical nets were collected at 14 sites along the hydroacoustic transects for abundance and size structure of Mysis diluviana ( Figure 1...
Journal Article
Aquatic Ecosystem Health & Management (2014) 17 (4): 357–364.
Published: 02 October 2014
... from multi-mesh gill nets. The dominant fish species in the gill net program were recorded with both active methods although the relative composition differed, mainly as a consequence of differences in species and size selectivity. Detonations provided additional, small-bodied, species that were not...
Journal Article
Aquatic Ecosystem Health & Management (2016) 19 (1): 83–91.
Published: 02 January 2016
... relationship. This Crab is the most common edible Crab species found in the lagoon, comprising 93.10% of total catch from crab pots and 89.86% of total catch from crab nets. Sex ratios (male:female) were 1:0.86 and 1:0.82 in crab pots and nets, respectively. Female crabs of various sizes were randomly sampled...
Journal Article
Aquatic Ecosystem Health & Management (2009) 12 (1): 23–28.
Published: 09 March 2009
... 50 m in length, with the exception of the 38 mm mesh panel, which was 25 m in length. Two net gangs were set overnight, fishing approximately 24 hours within each of the randomly selected grid squares. Lake whitefish were sampled for total length (mm), fork length (mm), weight (g), sex, maturity...
Journal Article
Aquatic Ecosystem Health & Management (2010) 13 (2): 214–221.
Published: 28 May 2010
... in 2006 from Hickley et al., 2002). Fleets of gillnets, each with a depth of 1.5 m, a length of 45 m and mesh sizes ranging from 0.5 to 3 inches, were used for fishing. The nets were set overnight parallel to the shore at each of the sampling stations ( Figure 1 ) for 12 hours and examined...
Journal Article
Aquatic Ecosystem Health & Management (2014) 17 (1): 41–51.
Published: 02 January 2014
...Figure 3. Variation in total (a) and standard (b) lengths, of fish, in the mesh size (c), height (d) and length (e) of nets and in the number of hauls of nets per trip (g) and that of fishermen (f) per fishing unit according to littoral substrate type. (Color figure available online.) ...
Journal Article
Aquatic Ecosystem Health & Management (2003) 6 (3): 325–336.
Published: 01 September 2003
... commercial gillnet fishery were mature. Fishing pressure on juvenile, immature fish is unlikely to be the cause of the observed decrease in Barbus stocks. Size control regulations like mesh size restrictions, intended to protect the immature part of fish populations are expected to have little positive...
Journal Article
Aquatic Ecosystem Health & Management (2018) 21 (1): 30–40.
Published: 02 January 2018
... ; Boudreau et al., 1991 ; Martin et al., 2006 ; Sourisseau and Carlotti, 2006 ). Size classes with zero biovolume were not considered when computing the NBSS linear regression. Because the abundance of minimum and maximum size classes was greatly influenced by the mesh of the plankton net (García et al...
Journal Article
Aquatic Ecosystem Health & Management (2011) 14 (4): 443–455.
Published: 01 October 2011
.... Fish, turtles, and crayfish were collected with fyke nets deployed for 48 h and tended daily. Nets were set in pairs in lead-to-lead configuration parallel to shore, with large-frame nets (0.9 × 1.2 m frame, 5 and 13 mm mesh) at ∼1.0 m water depth and small-frame nets (0.45 × 0.9 m, 5 mm mesh) at ∼0.4...
Journal Article
Aquatic Ecosystem Health & Management (2010) 13 (1): 11–19.
Published: 26 February 2010
... obtained around 9 h 00–10 h 00. One kilogram of fresh fish was sampled randomly from each of three seine nets with mesh sizes of 3, 5 and 10 mm and three gill nets with 15, 20 and 30 mm mesh sizes, along with all fish from trap nets, hooks and divers (who catch fish by hand). The fishing by seine nets is...
Journal Article
Aquatic Ecosystem Health & Management (2007) 10 (4): 398–406.
Published: 28 November 2007
...–integrator with a 120 kHz split–beam transducer. Fish samples were collected using a frame trawl, bottom trawl and pelagic trawl, all lined with 5 mm mesh size netting. The mean total biomass of R. argentea in the lake was 476,902 ± 339,308 t at an average fish density of 7.3 ± 5.4 t km −2 in the sampled...
Journal Article
Aquatic Ecosystem Health & Management (2007) 10 (4): 458–466.
Published: 28 November 2007
... juvenile Clarias (41%), haplocromines (37%), dagaa (Rastrineobola argentea) (10%), Synodontis (3%), Mormyrus (2%), and Labeo (1%). The total annual weight of the mostly undersized and illegally caught (beach seining, gillnets below 3″ mesh) baitfish was estimated at 7,465 t. The size of the Nile perch...
Journal Article
Aquatic Ecosystem Health & Management (2003) 6 (3): 299–310.
Published: 01 September 2003
... (types as well as mesh sizes of gill nets) and their modes of operation (e.g., active versus passive use of gill nets) (e.g., see Figure 4). Export market chain One source of information that can provide poten- tially reliable capture statistics is the export figures. In the past this has created...
Journal Article
Aquatic Ecosystem Health & Management (2009) 12 (3): 264–270.
Published: 24 September 2009
.... When interpreting the present data, it is important to note that due to the relatively small mesh size (140 μm) of NORPAC net in the present study, some of the smaller zooplankton components were caught, increasing the abundance values; whereas, in the previous studies which used larger mesh sizes...
Journal Article
Aquatic Ecosystem Health & Management (2008) 11 (1): 29–35.
Published: 10 March 2008
.... Fishermen are also forced to use both improved fishing gears and destructive ones (small mesh size nets that catch juveniles) to catch clupeids (I.A Kimirei, Tanzania Fisheries Research Institute, Kigoma, Tanzania, personal observation). Mosquito nets were reported to be in use in Zambia ( Aro and Mannini...