dc.contributor.author | Arrumm, A | |
dc.contributor.author | Mavuti, , | |
dc.date.accessioned | 2015-03-27T07:09:46Z | |
dc.date.available | 2015-03-27T07:09:46Z | |
dc.date.issued | 2013-09 | |
dc.identifier.citation | Mavuti, K M & Arrumm, A (2013). Morphometric and meristic variation between two endangered til apiine fishes O.esculentus and O. variabilis and the exotic tilapias O. niloticus and O. leucostictus in Lake Kanyaboli, Kenya. Fifth internationalconference of the pan African fish and Fisheries association (PAFFA5) held at Bujumbura, Burundi, 16 - 20 September 2013. (Diversity, conservation and sustainable management Book of abstract)s | en_US |
dc.identifier.uri | http://www.fishbaseforafrica.org/sites/default/files/files/Book%20of%20abstracts%20PAFFA5%20Bujumbura%282%29.pdf | |
dc.identifier.uri | http://hdl.handle.net/11295/81728 | |
dc.description.abstract | Lake Kany
aboli is unique as a living museum. The most important fishery of this lake is that of an
indigenous tilapiine fish,
Oreochromis esculentus
, which is virtually extinct in Lake Victoria.
Oreochromis variabilis
has been infrequently reported to occur in thi
s lake while two exotic species
O.
niloticus
and O. leucostictus
although less dominant, frequently appear in catches. The indigenous
tilapiine species have been listed as endangered and it is postulated that hybridization may have taken
place with the exo
tic tilapias. Morphological and meristic variation was examined in samples of the four
tilapia species;
Oreochromis esculentus, O. variabilis
,
O. niloticus
and
O. leucostictus
from Lake
Kanyaboli and its environs, to distinguish populations and identify hy
brids. All samples of
Oreochromis
variabilis
were collected from the nearby Kalenjuok and Mauna dams as none was found in Lake
Kanyaboli. A total of 20 morphological and 8 meristic characters were examined. Discriminant Function
and Principal Component ana
lyses indicated no correlation in the morphological characters between
Oreochromis esculentus
and
O. niloticus
and between
Oreochromis esculentus
and
O. leucostictus
. The
overall DF was significant (p<0.05). The species were best discriminated by the inte
r
-
orbital width
(IOW) the pre
-
pectoral length (Ppl), the anal fin length (AfL) and the anal spine length (AsL) with a
97% correct classification of specimen. However there were some overlap of individuals between
populations of
O. niloticus
and those of
O.
leucostictus
and
O. variabilis
. The present analyses do not
suffice to state the overlap as due to the presence of hybrids and therefore this necessitates some
biochemical analysis | en_US |
dc.language.iso | en | en_US |
dc.publisher | University of Nairobi | en_US |
dc.title | Morphometric and meristic variation between two endangered til apiine fishes o.Esculentus and o. Variabilis and the exotic tilapias o. Niloticus and o. Leucostictus in Lake Kanyaboli, Kenya | en_US |
dc.type | Presentation | en_US |
dc.type.material | en | en_US |