TABLE 8. A TABLE OF MATURITY SCALES FOR FISH (CONT'D). 



Species 



Criteria, on which the descriptions are based 



Author 



C. hareng us The height of the sexual glands . 



Pleuronectes Color, transparency of the ovary, presence of ovo- 

 platessa cytes in certain stages of development. 



Broch (1908) 



Frantz (1909) supple- 

 mented the Heincke- 

 Maier scale with a 

 microscopic descrip- 

 tion. 



C. harengus Color, transparency, form of the ovocytes, thick- 

 ness of the ovaries. 



Genus Alosa Diameter of the eggs , volume of the ovaries 



Genus Alosa Form, volume of the ovaries , color, diameter of 



the ovocytes, fluidity. 



C. harengus Diameter of the ovocytes. 



Cod (G. 

 morrhua) Color of the gonads , fluidity. 



Group I: Asp- 



ius, Lucio- 



perca , Esox. 



Group H: Abr- Size, form, and transp.arency of the ovocytes. 



amis brama , 



carp, Chal- 



calbumus . 



Perch ( Perca Presence of a certain complex of ovocytes in various 

 f.) stages of development, index of maturity. 



Sturgeons Pigmentation of the ovocytes, and how easy they are 



separated from the ovary. 



C. harengus Color, length of the gonads, index of maturity, fluid- 

 ity of the eggs . 



Lea (1909), completed 

 the Heincke - Maier 

 scale. 



Vukotich (1915) Com- 

 bined and somewhat 

 changed the Heincke - 

 Maier scale. 



Kiselevich(1923). 

 This scale is used in 

 the Volga -Caspian 

 fishery. 



Johansen (1924). 



Graham (1924). 



Filatov (1926). 



Meien(1927). Stated 

 the duration of the in- 

 dividual stages. 



Nedoshivin (1929). 



Wood (1930). The 

 scale accepted by the 

 ICES. 



Cod (G^ Diameter and color of the ovocytes, thickness of the 



morrhua) ovaries . 



Poulsen(1931). 



229 



