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Determination of larvae development stages in rainbow trout (oncorhynchusmykiss walbaum, 1792) based upon morphologic observations, pigment distribution patterns, and fin development patterns

N. Norouzi, R. Ghorbani


Our knowledge aboutfish biology couldn't be completed without our awareness of bio- history oflarvae. The study of fish's bio- history can provide information about fishlarvae actions and reactions in its first life stages. This general descriptioncan represent the anatomical, physiological, behavioral and ecological changesin development stages of fishes. In this research, we study the larvaedevelopment stages on 30 larvae of rainbow trout based on morphologicalobservation, pigment scattering pattern and fins development pattern. From theviewpoint of pigments pattern, in general, the highest pigments wereconcentrated on the rear of head and between eyes and the lowest was on finsbud and their abdomen. The morphological observations in larvae stage indicatedthat larvae in first stage has different shape than its puberty and itsappearance will change in parallel to its development during the time, so thatat the end of stage, it is so like an adult fish. In same researches on larvaeof other salmon species, there are relative similarities due to pigmentscattering pattern but there are significant differences in morphologicalobservation and also the pattern of fins development.


Barimani, A., 1356. Fish Biology and Fisheries. First Edition. Urormia University Press, Pages. 180-170.

Demir, O., Gulle, I., Gumuş, E., Kuçuk, F., Gunlu, A., Kepenek, K., 2010. Some Reproductive Features of

Brown Trout (Salmo trutta macrostigma Dumeril, 1858) and its Larval Development under Culture

Conditions. Pak. Vet. J. 30(4), 223-226.

Helfman, G.S., Collette, B.B., Facey, D.e., 2005. The diversity of Fishes. 17-140PP.

Gisbert, E., Merino, G., Muguet, J.B., Bush, D., Piedrahita, R., H and Conklin, D.E., 2002. Morphological development and allometric growth patterns in hatchery-reared California Halibut Larvae. J.Fish

boil. 61, 1217-1229.

Jafari, M., Kamarudin, M.S., Saad, CH.R., Arshad, A., Oryan, SH., Bahmani, M., 2009. Development of morphology in hatchery- reared Rutilus frissi kutum Larvae. European Journal of Scientific research, 38(2), 296-305.

King, J.R ., Mcfarlane, G.A., 2003. Marine fish life history strategies: applications to fishery management, Fisheries Manag and Ecol. pp, 249–264.

Masuma, S., Tezuka, N., teruya, K., 1993. Embryonic and morphological development of larval and juvenile Coral Trout, plectropomus leopardus, Japan. J. ichthyol, 40, 333-342.

Rabbaniha, M., 1386. Marine Ichthyoplanktons. First edition, pages, 1-32.

Ristovska, M., Spirovski, Z., Huysentruyt, F., Adriaens, D., 2008. Shape changes in the External morphology during early development of the Ohrid trout (Salmo letnica Karaman, 1924). Republic of Macedonia.

Okumuş, I., Çelikkale, M.S., Kurtoglu I.Z., Başçınar, N., 1999. Growth performance, feed intake and feed efficiency of brook trout (Salvelnius fontinlais) and rainbow trout (Oncorhynchus mykiss) grow as steril or mixed. Turk. J. Vet. Anim. Sci, 23,123-130.

Puvaneswari, S., Marimuthu, K., Karuppasamy, R., Haniffa, MA., 2009. Early embryonic and larval development of Indian catfish. EurAsia. J. Biosci, 12(3), 84-96.

Urho, L., 1996. Identification of Perch (Perca fluviatilis) Pikeperch (Stizostedion lucioperca) and ruffe (Gymnocephalus cernuus). 33, 659-667.

Uysal, I., Alpbaz, A., 2002. Comparsion of the growth performance and mortality in Abant trout (Stabanticus T, 1954) and rainbow trout (O mykiss W,1792) under farming conditions. Turk. Zool. Derg,. 26,399-403.

Uysal, I., Alpbaz, A., 2002. Food intake and feed conversion ratios in Abant trout (S. t abanticus T,1954) and rainbow trout (O mykiss W, 1792) in pond culture. Turk. J. Biol. 26, 83-88.

Vossoughi, SH., Mostajir, B., 1388. Freshwater fish. Tehran University Press, Eighth Edition.

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