Preliminary estimates of the population parameters of major fish species in Lake Ayamé I (Bia basin; Côte d'Ivoire)

Preliminary estimates of the population parameters of major fish species in Lake Ayamé I (Bia basin; Côte d'Ivoire)

Length frequency data collected from artisanal fisheries in Lake Ayamé I (Côte d'Ivoire) from August 2004 to 2005 were analysed with F isat software using the E lefan package to estimate the population parameters of 11 fish species. Asymptotic values for total length (L[infinity]) ranged from 2...

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Bibliographic Details
Published in:Journal of applied ichthyology Vol. 26; no. 1; pp. 57 - 63
Main Authors: Tah, L, Joanny, T.G, N'Douba, V, Kouassi, J.N, Moreau, J
Format: Journal Article
Language:English
Published: Oxford, UK Oxford, UK : Blackwell Publishing Ltd 01-02-2010
Blackwell Publishing Ltd
Subjects:
Brycinus
Chrysichthys nigrodigitatus
Freshwater
Hemichromis fasciatus
Hepsetus odoe
Mormyrops anguilloides
Oreochromis niloticus
Sarotherodon melanotheron
Schilbe mandibularis
Synodontis bastiani
Africa, Ivory Coast, Ayame L
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Summary:Length frequency data collected from artisanal fisheries in Lake Ayamé I (Côte d'Ivoire) from August 2004 to 2005 were analysed with F isat software using the E lefan package to estimate the population parameters of 11 fish species. Asymptotic values for total length (L[infinity]) ranged from 20.5 cm for Brycinus imberi to 78 cm for Mormyrops anguilloides. Growth rates (k) varied from 0.24 year⁻¹ for Chrysichthys nigrodigitatus to 0.57 year⁻¹ for Hemichromis fasciatus. The growth performance estimates were close to the values found by others authors and reported in FishBase 2008. Fishing mortality (F) and exploitation rate (E) were found to be below optimum levels of exploitation for most fish species. Recruitment was noted as year-round and bimodal for most studied populations. The data sets were limited in most cases, thus this study provides preliminary population parameters only, but for species for which information is scarce. For application in stock assessment, the growth parameters and especially the natural mortality data require further confirmation.
Bibliography:http://dx.doi.org/10.1111/j.1439-0426.2009.01375.x
ark:/67375/WNG-SGW3VWBB-P
ArticleID:JAI1375
istex:044342D936DDBD520E147E97416005135C4AB3CE
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0175-8659
1439-0426
DOI:10.1111/j.1439-0426.2009.01375.x