SOME REPRODUCTIVE ASPECTS OF SPECIES OF LABEOBARBUS (CYPRINIDAE: TELEOSTEI) IN GILGEL ABAY RIVER AND ITS TRIBUTARIES, ETHIOPIA
Keywords:
Abay basin, Condition factor, Conservation, Fecundity, Lake Tana.
Abstract
Six sampling sites of Gilgel Abay River and its tributaries,were sampled by using monofilaments (5-55 mm) and gillnets having mesh
sizes of 6, 8, 10, 12 and 14 cm stretched bar mesh with a length of 25 m and depth of 1.5 m, twice each month from August to October, and once in
November, 2011. Fishes were identified to the species level. Fork length (FL), total weight (TW) and gonad weight (GW) of each specimen were
measured. The relationship between FL and TW for the dominant species of Labeobarbus showed curvilinear relationship. Condition factor of L.
intermedius, L. brevicephalus and L. nedgia showed that there was significant difference (p<0.001) between sexes in all three species. In all catch, females were more numerous than males. The highest GSI (15.54%) was recorded for L. brevicephalus but the maximum mean monthly GSI (7.01%) was recorded for L. longissimus in September and minimum GSI (0.45%) for L. macrophtalmus in August. Absolute fecundity, mean fecundity and mean FL for L. intermedius was the highest than the rest. The relationship between absolute fecundity (AF) and FL, TW, and GW of L. intermedius, L.
brevicephalus, and L. nedgia were linear (AF=596.4FL-8990, R 2 =0.79; AF=19.78TW+978.1, R 2 =0.79 and AF=371.5 GW+573.5, R 2 =0.93). There
was also strong relationship between AF and FL, TW, and GW (p<0.001) in the three species.
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References
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Vijverberg, J., Sibbing, F.A. and Eshete Dejen. (2009). Lake Tana: Source of the Blue Nile. In: The Nile: Origin, Environment, Limnology and Human Use, pp. 179–195 (Dumont, H.J., ed.). Springer Science, Business Media B.V.112.
Wassie Anteneh (2005). The Spawning Migration and Reproductive Biology of Labeobarbus (Cyprinidae: Teleostei) of Lake Tana to Dirma and Megech
Rivers. M.Sc. Thesis, Addis Ababa University, Ethiopia.
Zeleke Berie (2007). Diversity, Relative Abundance and Biology of Fishes in Beles and Gelgel Beles Rivers, Abay Basin Ethiopia. M.Sc. Thesis, Addis Ababa University, Ethiopia.
Abebe Getahun and Eshete Dejen (2012). Fishes of Lake Tana: A Guidebook. Addis Ababa University Press, Ethiopia.
Abebe Getahun, Eshete Dejen and Wassie Anteneh (2008). Fishery studies of Rib River,Lake Tana Basin, Ethiopia. A report submitted to World Bank. Vol. 2:1573.
Akewake Geremew (2007). Taxonomic Revision, Relative Abundance, and Aspects of the Biology of Some Species of the Genus Garra, Hamilton 1922 (Pisces: Cyprinid) in Lake Tana, Ethiopia. M.Sc. Thesis, Addis Ababa University, Ethiopia.
Alekseyev, S.S., Dgebuadze, Yu,Yu, Mina, M.V. and Mironovsky, A.N. (1996). Small „large barbs‟ spawning in tributaries of Lake Tana: What are they? Folia Zool. 45 (suppl. 1): 85–96.
Assefa Tessema (2010). Diversity, Relative Abundance and Biology of Fishes in Borkena and Mille Rivers, Awash Basin, Ethiopia. M.Sc. Thesis, Bahir Dar University, Ethiopia.
Bagenal, T.B. (1978). Aspects of fish fecundity. In: Ecology of Freshwater Fish Production, pp. 75–102 (Gerking, S., ed.). Oxford, Blackwell.
Bagenal, T.B. and Tesch, F.W. (1978). Age and growth. In: Methods for Assessment of Fish Production in Fresh waters, pp. 101–136 (Bagenal, T.B., ed.). Blackwell, Oxford, New York.
de Graaf, M., Machiels, M.A.M., Tesfaye Wudneh and Sibbing, F.A. (2004). Declining stocks of Lake Tana‟s endemic Barbus species flock (Pisces; Cyprinidae): Natural variation of human impact? Biol. Conserv. 116: 277–287.
de Graaf, M., Nentwich, E.D., Osse, J.W.M. and Sibbing, F.A. (2005). Lacustrine spawning new reproductive strategy among „large‟ African cyprinid fishes? J. Fish. Biol. 66:1214–1236.
Demeke Admassu and Elias Dadebo (1997). Diet composition, length-weight relationship and condition factor of Barbus species Rüppell, 1836 (Pisces: Cyprinidae) in Lake Awassa, Ethiopia. SINET: Ethiop. J. Sci. 20(1):13–30.
Dereje Tewabe (2008). Diversity, Relative Abundance and Biology of Fishes in Gendwuha, Guang, Shinfa and Ayima Rivers, North Gondar Ethiopia. M.Sc. Thesis, Addis Ababa University, Ethiopia.
Elias Dadebo, Ahlgren, G. and Ahlgren, I. (2003). Aspects of reproductive biology of Labeo horie Heckel (Pisces: Cyprinidae) in Lake Chamo, Ethiopia. Afr. J. Ecol.41: 31–38.
Eshete Dejen (2003). Ecology and Potential for Fishery of the Small Barbs (Cyprinidae, Teleostei) of Lake Tana, Ethiopia. Ph.D. Thesis, Wageningen
Agricultural University, the Netherlands.
Genanaw Tesfaye (2006). Diversity, Relative Abundance and Biology of Fishes in Angereb and Sanja Rivers, Tekeze Basin, Ethiopia. M.Sc. Thesis, Addis Ababa University, Ethiopia.
Lecren, G.D. (1951). The length-weight relationship and seasonal cycle in gonad weight and condition in the perch (Perca fluviatilis). J. Anim. Ecol. 20:20–29.
MacGregory, J.S. (1957). Fecundity of the Pacific sardine (Sardinops caerulea). US. Fish Wildl. Serv., Fish. Bull. 121: 427–449.
Matsuyama, M., Adachi, S., Nagahama, Y. and Matsuura, S. (1988). Diurnal rhythm of oocyte development and plasma steroid hormone levels in the females red sea bream during the spawning season. Aquaculture 73: 357–372.
Mohammed Omer (2010). Diversity, Relative Abundance and Biology of Fishes in the Head of Blue Nile River, Blue Nile Basin, Ethiopia. M.Sc. Thesis, Bahir Dar University, Ethiopia.
Nagelkerke, L.A.J., and Sibbing, F.A. (1996). Reproductive segregation among the large barbs (Barbus intermedius complex) of Lake Tana, Ethiopia. An example of intralacustrine speciation? J. Fish. Biol. 49: 1244–1266.
Nagelkerke, L.A.J. (1997). The Barbs of Lake Tana, Ethiopia: Morphological Diversity and its Implications for Taxonomy, Trophic Resource Partitioning and Fisheries. Ph.D. Thesis, Agricultural University Wageningen, the Netherlands.
Nagelkerke, L.A.J., Sibbing, F.A., Boogaart, J.G.M., van den, Lammens, E.H.R.R. and Osse, J.W.M. (1994). The barbs (Barbus spp.) of Lake Tana: A forgotten species flock? Environ. Biol. Fish. 39: 1–22.
Palstra, A.P., de Graaf, M. and Sibbing, F.A. (2004). Riverine spawning in a lacustrine cyprinid species flock, facilitated by homing? Anim. Biol. 54: 393–415.
Reyntjens, D., Tarekegn Mengistu, Tesfaye Wudneh and Palin, C. (1998). Fisheries development in Ethiopia–which way now? Eur. Union Bull. 11(1): 20–22.
Sandovy, Y. and Shapiro, D.Y. (1987). Criteria for the diagnosis of hermaphroditism in fishes. Copeia 1: 136–156.
Shewit Gebremedhin (2011). Spawning Migration of Labeobarbus Species of Lake Tana to Arno-Garno River, Blue Nile Basin, Ethiopia. M.Sc. Thesis, Bahir Dar University. Ethiopia.
Skelton, P.H., Tweddle, D. and Jackson, P. (1991). Cyprinids of Africa. In: Cyprinid
Fishes, Systematics, Biology and Exploitation, pp. 211–233 (Winfield, I.J. and Nelson, J.S., eds.). Chapman & Hall, London.
Taylor, M.H. and Villoso, E.P. (1994). Daily ovarian and spawning cycles in weakfish. T. Am. Fish. Soc. 123: 9–14.
Vijverberg, J., Sibbing, F.A. and Eshete Dejen. (2009). Lake Tana: Source of the Blue Nile. In: The Nile: Origin, Environment, Limnology and Human Use, pp. 179–195 (Dumont, H.J., ed.). Springer Science, Business Media B.V.112.
Wassie Anteneh (2005). The Spawning Migration and Reproductive Biology of Labeobarbus (Cyprinidae: Teleostei) of Lake Tana to Dirma and Megech
Rivers. M.Sc. Thesis, Addis Ababa University, Ethiopia.
Zeleke Berie (2007). Diversity, Relative Abundance and Biology of Fishes in Beles and Gelgel Beles Rivers, Abay Basin Ethiopia. M.Sc. Thesis, Addis Ababa University, Ethiopia.
Published
2014-10-11
Section
Articles