Matches in SemOpenAlex for { <https://semopenalex.org/work/W2086533691> ?p ?o ?g. }
Showing items 1 to 86 of
86
with 100 items per page.
- W2086533691 endingPage "165" @default.
- W2086533691 startingPage "159" @default.
- W2086533691 abstract "The fisheries of Lake Victoria in East Africa must be managed effectively to ensure sustainable food supplies. This has been impossible in the past due to inadequate knowledge of commercially important fish stocks. Here we present the first acoustic abundance estimates of fish in Lake Victoria. Five lakewide acoustic surveys were conducted between 1999 and 2001, using the Simrad EY500 echo-integrator with a 120 kHz split-beam transducer. There are many species of fish in Lake Victoria, however, only limited identification of targets can be achieved by present methods. Broad categories were distinguished by visual examination of echo-traces. The echo-integrals were partitioned between four target groups: (1) the Nile perch (Lates niloticus), a top predator, (2) small pelagics comprising mainly the dagaa Rastrineobola argentea together with mixed species of haplochromines, (3) the crustacean Caridina nilotica and (4) other species. Spatial and temporal differences in the Standing Crop were observed between north and south, and between shallow and deep water. Most fish were found inshore but the spatial distribution varied between seasons. Mid-lake fish densities were higher in August compared to February. In August, the water column is well mixed while in February it is stratified with a low-oxygen layer inhospitable to fish near the bottom. There are consequent changes in the characteristics of observed echo-traces. Over the survey series, Nile perch biomass showed a consistent decline, while the stocks of small pelagic species increased. We emphasize the need for simple rules to identify species, and hydrographic monitoring to assist echo-trace classification. In the absence of any other source of comprehensive biomass estimates, the value of acoustic surveying in Lake Victoria is demonstrated." @default.
- W2086533691 created "2016-06-24" @default.
- W2086533691 creator A5054913116 @default.
- W2086533691 date "2003-07-01" @default.
- W2086533691 modified "2023-10-13" @default.
- W2086533691 title "Spatial distribution and temporal changes in the fish populations of Lake Victoria" @default.
- W2086533691 cites W179413179 @default.
- W2086533691 cites W1973291150 @default.
- W2086533691 cites W1973691158 @default.
- W2086533691 cites W2001885385 @default.
- W2086533691 cites W2030803126 @default.
- W2086533691 cites W2043681721 @default.
- W2086533691 cites W2048101103 @default.
- W2086533691 cites W2056395431 @default.
- W2086533691 cites W2057843391 @default.
- W2086533691 cites W2075072356 @default.
- W2086533691 cites W2124683695 @default.
- W2086533691 cites W2139977096 @default.
- W2086533691 cites W21940912 @default.
- W2086533691 cites W2556540112 @default.
- W2086533691 cites W572248941 @default.
- W2086533691 cites W647963663 @default.
- W2086533691 doi "https://doi.org/10.1016/s0990-7440(03)00008-1" @default.
- W2086533691 hasPublicationYear "2003" @default.
- W2086533691 type Work @default.
- W2086533691 sameAs 2086533691 @default.
- W2086533691 citedByCount "62" @default.
- W2086533691 countsByYear W20865336912012 @default.
- W2086533691 countsByYear W20865336912013 @default.
- W2086533691 countsByYear W20865336912014 @default.
- W2086533691 countsByYear W20865336912015 @default.
- W2086533691 countsByYear W20865336912016 @default.
- W2086533691 countsByYear W20865336912017 @default.
- W2086533691 countsByYear W20865336912018 @default.
- W2086533691 countsByYear W20865336912019 @default.
- W2086533691 countsByYear W20865336912020 @default.
- W2086533691 countsByYear W20865336912021 @default.
- W2086533691 countsByYear W20865336912022 @default.
- W2086533691 countsByYear W20865336912023 @default.
- W2086533691 crossrefType "journal-article" @default.
- W2086533691 hasAuthorship W2086533691A5054913116 @default.
- W2086533691 hasBestOaLocation W20865336912 @default.
- W2086533691 hasConcept C110121322 @default.
- W2086533691 hasConcept C134306372 @default.
- W2086533691 hasConcept C18903297 @default.
- W2086533691 hasConcept C205649164 @default.
- W2086533691 hasConcept C2777016058 @default.
- W2086533691 hasConcept C2909208804 @default.
- W2086533691 hasConcept C33923547 @default.
- W2086533691 hasConcept C39432304 @default.
- W2086533691 hasConcept C505870484 @default.
- W2086533691 hasConcept C62649853 @default.
- W2086533691 hasConcept C86803240 @default.
- W2086533691 hasConceptScore W2086533691C110121322 @default.
- W2086533691 hasConceptScore W2086533691C134306372 @default.
- W2086533691 hasConceptScore W2086533691C18903297 @default.
- W2086533691 hasConceptScore W2086533691C205649164 @default.
- W2086533691 hasConceptScore W2086533691C2777016058 @default.
- W2086533691 hasConceptScore W2086533691C2909208804 @default.
- W2086533691 hasConceptScore W2086533691C33923547 @default.
- W2086533691 hasConceptScore W2086533691C39432304 @default.
- W2086533691 hasConceptScore W2086533691C505870484 @default.
- W2086533691 hasConceptScore W2086533691C62649853 @default.
- W2086533691 hasConceptScore W2086533691C86803240 @default.
- W2086533691 hasIssue "3" @default.
- W2086533691 hasLocation W20865336911 @default.
- W2086533691 hasLocation W20865336912 @default.
- W2086533691 hasOpenAccess W2086533691 @default.
- W2086533691 hasPrimaryLocation W20865336911 @default.
- W2086533691 hasRelatedWork W2001709602 @default.
- W2086533691 hasRelatedWork W2357780204 @default.
- W2086533691 hasRelatedWork W2367003404 @default.
- W2086533691 hasRelatedWork W2370030607 @default.
- W2086533691 hasRelatedWork W2392239256 @default.
- W2086533691 hasRelatedWork W2488594940 @default.
- W2086533691 hasRelatedWork W2784609361 @default.
- W2086533691 hasRelatedWork W2899084033 @default.
- W2086533691 hasRelatedWork W3201991736 @default.
- W2086533691 hasRelatedWork W4290613445 @default.
- W2086533691 hasVolume "16" @default.
- W2086533691 isParatext "false" @default.
- W2086533691 isRetracted "false" @default.
- W2086533691 magId "2086533691" @default.
- W2086533691 workType "article" @default.