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catch statistics

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Journal Article
Aquatic Ecosystem Health & Management (2003) 6 (3): 299–310.
Published: 01 September 2003
...I. G. Cowx; M. van der Knaap; L. I. Muhoozi; A. Othina The fisheries of Lake Victoria are highly dispersed and catch statistical information is insufficient for supporting management. Catch assessment surveys for the three riparian countries were found to be weak or inadequate and a strategy for...
Journal Article
Aquatic Ecosystem Health & Management (2008) 11 (2): 212–224.
Published: 06 June 2008
... China Sea by trawlers from Bac Lieu and Ca Mau provinces. The official catch statistics for these two provinces are indicated in Table 1 . This information is collected by statistical officers in the communes interviewing a few fishers once or twice a year. From the district level the catch and effort...
Journal Article
Aquatic Ecosystem Health & Management (2002) 5 (3): 293–305.
Published: 01 September 2002
... fisheries in developing countries. The fish stocks of Lake Malawi/Nyassa are currently managed by restrictions on fishing gears, fishing areas, and fishing times. Catch statistics and an annual frame survey of fishing effort provide input data for stock assessment studies that are used to derive these...
Journal Article
Aquatic Ecosystem Health & Management (2014) 17 (1): 25–33.
Published: 02 January 2014
..., volumes that translate into annual earnings of tens of millions of US dollars (Mölsä et al., 1999 ). Recent statistics from Bujumbura sub-basin show that the catch per unit effort is decreasing probably due to excessive fishing pressure (Mulimbwa, 2006 ). The highest fishing effort per km of...
Image
Published: 03 April 2015
Figure 2. Dynamics of fish catches, thousand tons; 1927–2000 official statistics data (dashed line, left axis) and percentage in total catch (right axis) of fishes of different ecological groups. More
Journal Article
Aquatic Ecosystem Health & Management (2016) 19 (4): 468–475.
Published: 01 October 2016
...Zhixin Ke; Yehui Tan; Liangmin Huang; Chunyu Zhao; Huajian Liu The Pearl River estuary is the second largest estuary in the South China Sea. The species composition and trophic structure of shrimp-trawl catches from this estuary were investigated using stable isotope analyses during the winter of...
Includes: Supplementary data
Journal Article
Aquatic Ecosystem Health & Management (2009) 12 (1): 23–28.
Published: 09 March 2009
... statistical catch-at-age models for the derivation of lake whitefish commercial catch quotas in the North Channel. First Nation commercial catch quotas condition catch-per-unit-effort Commercial fisheries, within the Canadian waters of Lake Huron, have been managed by the province of Ontario...
Image
Published: 03 April 2015
Figure 4. Redlip Mullet catch (initial stage of commercial exploitation) against the background of annual total commercial fish catch in the Sea of Azov (official statistics data, thousand tons) 1994–2000: rectangular: total catch; dots: redlip catch. More
Image
Published: 02 October 2017
–1977) their introduction (b). Differences are absent, Mann–Whitney U tests, P > 0.25; seemingly reduced variation in commercial catches after introduction is not statistically significant and is presumably related to a change of fishing methods (based on data from Arbačiauskas et al., 2010 ). More
Journal Article
Aquatic Ecosystem Health & Management (2002) 5 (3): 379–389.
Published: 01 September 2002
... eels. Copyright © AEHMS 2002 catch statistics population dynamics pikeperch perch pike vendace smelt eel Long-term trends in the Ž sh communities of Lakes Peipsi and Vo rtsja¨rv (Estonia) Andu Kangur,¤ Peeter Kangur, and Ervin Pihu Institute of Zoology and Botany at the Estonian...
Journal Article
Aquatic Ecosystem Health & Management (2007) 10 (4): 381–391.
Published: 28 November 2007
... : LVEMP National Secretariat . Cowx , I. G. , Van der Knaap , M , Muhoozi , L. I. and Othina , A. 2003 . Improving fishery catch statistics for Lake Victoria . Journal of Ecosystem Health and Management , 6 : 299 – 310 . Fryer , G. 1960 . The feeding mechanism...
Journal Article
Aquatic Ecosystem Health & Management (2018) 21 (2): 121–131.
Published: 03 April 2018
... impact on catch rates of changes over time of factors other than abundance (Maunder and Punt, 2004 ). Generalised linear models (GLMs) are general and powerful statistical techniques that are commonly used for standardising catch and effort data (GLMs; Nelder and Wedderburn, 1972 ). They are defined by...
Journal Article
Aquatic Ecosystem Health & Management (2006) 9 (4): 407–418.
Published: 01 December 2006
... ), while during the same period marine production increased from 46,700 t in 1988 to 150,000 t in 1994 and declined to 76,700 t in 2000 ( Figure 1b ) ( National Statistical Service of Greece, NSSG, 1988–2000 ). The NSSG, which is responsible for gathering this information, provides catches from 1969 onward...
Journal Article
Aquatic Ecosystem Health & Management (2010) 13 (2): 196–202.
Published: 28 May 2010
... Boat per Day (kg boat −1 day −1 ), FD = number of Fishing Days in a month (21 days average) ( Budeba and Cowx, 2007b ). Friedman test (for repeated measures) was used for the test of spatial and temporal variations in catch rates of C. nilotica while one sample t- test statistic for comparison...
Journal Article
Aquatic Ecosystem Health & Management (2010) 13 (1): 11–19.
Published: 26 February 2010
... , A. 2003 . Improving fishery catch statistics for Lake Victoria . Aquat. Ecosyst. Health and Manage. , 6 : 299 – 310 . Duncan , A. 1999 . “ Pelagic fish and fisheries in Asian and African lakes and reservoirs ”. In Fish and fisheries of lakes and reservoirs in Southeast Asia...
Journal Article
Aquatic Ecosystem Health & Management (2002) 5 (2): 139–146.
Published: 01 June 2002
...Adelaida L. Palma; Adan S. Diamante; Romualdo M. Pol An assessment of the major fishery resources of Laguna de Bay was conducted in 1995–1996. The study covered the socio-economics of landed fish catch and inventory of fishing gears. The socio-economic survey covered 3,055 fishermen; 87.5% were...
Journal Article
Aquatic Ecosystem Health & Management (2013) 16 (4): 395–407.
Published: 01 October 2013
...M. K. Das; A. P. Sharma; K. K. Vass; R. K. Tyagi; V. R. Suresh; M. Naskar; A. B. Akolkar The Ganges River is one of the largest river systems in the world and sustains a rich biodiversity of fish and fishers. In recent years, a decline in fish diversity and catch has become apparent due to various...
Includes: Supplementary data
Journal Article
Aquatic Ecosystem Health & Management (2008) 11 (1): 29–35.
Published: 10 March 2008
..., Stolothrissa tanganicae . Although the efficiency in catching different species ( S. tanganicae , Limnothrissa miodon and Lates stappersii ) differs from one method to another, all methods land a considerable proportion of each species. Catch and effort statistics from the Tanzanian side of Lake Tanganyika...
Journal Article
Aquatic Ecosystem Health & Management (2014) 17 (2): 107–114.
Published: 03 April 2014
... Smallmouth Bass catch per effort values than fine-substrate rivers and southern rivers tended to have higher catch per effort values than northern rivers in Wisconsin. We used the expected Smallmouth Bass relative density estimates to assess the level of impairment of Smallmouth Bass populations in three...
Journal Article
Aquatic Ecosystem Health & Management (2002) 5 (3): 283–292.
Published: 01 September 2002
... Ž gures are based on Ž ve lake-wide surveys (Table 2). Proportions of each Ž sh species in the total catch of each country were available or could be derived from the catch statistics (Coenen et al., 1998) (Table 2). Species proportions for the latitudinally deŽ ned zones were calculated fromcatch samples...