1796. 



Yashouv, A., and A. Halevy. 1967. Studies on growth and 

 productivity of Tilapia aurea and its hybrid "Gan 

 Shemuel" in experimental ponds at Dor. Bamidgeh 

 19(l):16-22. 



1800. 



1797 



1798 



1799 



and 



1967. Observations on the growth 



rate and yield of Tilapia aurea and the hybrid "Gan 

 Shemuel" in experimental ponds in Dor. (In Heb.) 

 Fish. Fish Breeding. Isr. 2(2):17-22. 



, and . 1970. Experimental studies on the 



growth of male Tilapia aurea and Tilapia aurea x Tilapia 

 volcani. (In Heb.) Fish. Fish Breeding Isr. 5(3): 37-44. 



and 



1973. Observation on the growth of 



hybrid fingerlings of Tilapia crosses (Tilapia aurea 

 male x T. volcani female). Bamidgeh 25(3): 85-88 



and 



. 1974. Observations on the growth 



of hybrid fingerlings of Tilapia crosses. Dayigu-midgeh 

 be-yisrael (Ha-tahanah le-heker ha-dayig ha-yami) 

 Haifa 8(2/3):33.--35. 



-Z- 



1801 



1802. 



Zahl, P. A. 1973. Those outlandish goldfish! 

 Mag. 143(4) :514-533. 



Natl. Geogr. 



1803 



Zander, CD. 1969. Uber die Entstehung und Veranderung von 

 farbmustern in der gattung Xiphophorus (Pisces). 

 Qualitative Veranderungen nach Artkreuzung . Mitt. 

 Hamburg Zool. Mus . Inst. 66:241-271. 



Zhongying, Z., C. Qianru, H. Mei, and L. Kehong. 1979. 



Observations in the embryonic and larval development 

 of the backcross hybrids of Aristichthys nobilis+ 

 (Aristichthus nobilis x Hupophthalmichthus molitrix ) . 

 Acta Zool. Sinica 25(2): 108. 



1804. Zolczynski, S.J., Jr., and W.D. Davies. 1976. Growth charac- 



teristics of the northern and Florida subspecies of 

 largemouth bass and their hybrid, and a comparison 

 of catchability between the subspecies. Trans. Am. 

 Fish. Soc. 105(2):240-243. 



1805. Zonova, A.S., and V.S. Kirpichnikov. 1971. The selection of 



ropsha carp. In Seminar/study tour in the U.S.S.R. on 

 genetic selection and hybridization of cultivated fishes, 

 19 April-29 May 1968, p. 233-247. Rep. FAO/UNDP (TA) 

 2926. 



154 



