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Fishery Bulletin 11 7(3) 
A 
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Figure 2 
Images of ovary samples from northern rockflsh (Sebastes 
polyspinis ) collected in May 2014 in the Gulf of Alaska, 
showing partial reproductive failure due to incomplete fer¬ 
tilization. (A) A whole section of one lobe of an ovary. The 
left side of the lobe has fertilized embryos in the eyed stage 
(e), and the majority of the ovary is filled with unfertilized 
oocytes (o). (B) Several eyed embryos (e) and unfertilized 
oocytes (o) under a dissecting microscope. (C) A histological 
section with eyed embryos (e) and unfertilized oocytes (o). 
(oocytes that had initiated development were degenerat¬ 
ing), and skipped spawning caused by fertilization fail¬ 
ure (oocytes developed to the one-cell blastodisc stage but 
were not fertilized, and embryogenesis was not initiated) 
(Fig. 3). The proportion of adult northern and light dusky 
rockflsh that had ovaries with partial or total reproduc¬ 
tive failure were examined during the May and December 
sampling periods (Table 3). 
Generalized linear models, with Gaussian distribu¬ 
tion for response variables, were used to examine effects 
of maternal size, site, and season on relative fecundity. 
