Figure 3From: Why small males have big sperm: dimorphic squid sperm linked to alternative mating behavioursFertilization success by consort and sneaker sperm. (a-c) Mature oocytes were inseminated without sperm as a negative control (a), with sperm from consort spermatophores (b) and from sneaker spermatophores (c), and then cultured 48 hours and stained with DAPI. (d) A DIC image of developing embryos after 24 hours of insemination: arrowheads point to the animal pole where cleavage planes appear along with the animal-vegetal axis. (e, f) Fertilization rates in oocytes from eight females (1-8) inseminated with sperm from consort (e) or sneaker (f) spermatophores. Each colour-coded line represents one male.Back to article page