dc.contributor.author |
Orina Paul Sagwe |
|
dc.contributor.author |
Rasowo Joseph |
|
dc.contributor.author |
Gichana Elijah |
|
dc.contributor.author |
Maranga Benard |
|
dc.contributor.author |
Charo - Karisa Harrison |
|
dc.date.accessioned |
2018-10-29T12:38:42Z |
|
dc.date.available |
2018-10-29T12:38:42Z |
|
dc.date.issued |
2013 |
|
dc.identifier.uri |
http://www.fisheriesjournal.com/archives/2014/vol1issue6/PartC/147.pdf |
|
dc.identifier.uri |
http://ir.mu.ac.ke:8080/xmlui/handle/123456789/2079 |
|
dc.description.abstract |
Broodstock were collected by
use of an electro
-
fisher from four rivers; Mara, Migori, Nyando and Yala and
transported to KMFRI Sangoro hatchery for spawning. They were subjected to a 3 x 2 x 4 factorial des
ign (3
temperatures x 2 ovaprim dosages x 4 populations) with 72 treatments (3
replicates per treatment) in aquaria
flow through system. Each replicate in every population
were subjected to 22± 1°C, 26± 1°C and a control
(no temperature regulation). Two ovaprim dosages (0.2 and 0.5 mlkg
-
1) administered to female brooders.
Latency pe
riod significantly (p < 0.05) varied among treatments but remained the same among populations.
There was no significant difference (p > 0.05) in latency period between the two ovaprim dosages (0.
2 and
0.5 mlKg
-
1). However, temperature had a significant (p
< 0.05) effect on the spawning time, brooders under
26±1 °C responded at 6
-
8 h, those under 22±1 °C responded at 12
-
18 h and the controls responded at 16
-
18
h. Fecundity significantly (p < 0.05) depended on fish size and river source. Mean fertilization an
d hatching
rate were both dependent on temperature with temperature of 26±1 °C being the best performer for all
populations. Ovaprim dosage had no effect on ovulation. Larval survival was directly dependent on
temperature with 26±1 °C having the highest la
rval survival (89%), while the control had the least survival
(67%) but not significantly different from temperature 22±1 °C (71%). Yolk sac reabsorption was not
s
ignificantly related to the population source and ovaprim dosage but was directly related to
temperature
with temperature 26±1 °C having the shortest time (18
-
24 h) post hatching. Results indicate that ovaprim
dosage of 0.2 mlKg
-
1 and water temperature of 26±1 °C provides the optimal
L. victorianus
breeding
conditions in captivity. |
en_US |
dc.language.iso |
en |
en_US |
dc.publisher |
International Journal of Fisheries and Aquatic Studies |
en_US |
dc.relation.ispartofseries |
;International Journal of Fisheries and Aquatic Studies 2014; 1( 6 ): 138 - 143 |
|
dc.subject |
Labeo victorianus |
en_US |
dc.subject |
Latency period |
en_US |
dc.subject |
Ovaprim |
en_US |
dc.subject |
Temperature |
en_US |
dc.subject |
Survival |
en_US |
dc.title |
Artificial Breeding Protocol and Optimal Breeding Environment for Labeo victorianus (Boulenger, 1901) |
en_US |
dc.type |
Article |
en_US |