Swarup, 1958



Citation


Swarup, H. (1958) Stages in the development of the stikleback Gasterosteus aculeatus (L.). Journal of Embryology Experimental Morphology, pp. 373-383

Associated characteristics


Species Development state Trait Primary Data Secondary Data
Gasterosteus aculeatus Egg Egg adhesiveness The eggs remain together in a mass surrounded by mucus. […] Soon after oviposition the egg capsule hardens and the eggs become firmly attached to one another Non-Adhesive
Gasterosteus aculeatus Egg Degree-days for incubation 192 hours after fertilization 192.0 °C * day
Gasterosteus aculeatus Egg Temperature for incubation Here the embryos were kept until the yolk was completely used up. During the whole of this time the temperature remained between 18° and 19°C. Under this conditions the embryos take 6-8 days to hatch, and about 4 more days to complete absorption of yolk. 7.0 °C
Gasterosteus aculeatus Egg Egg size after water-hardening Eggs is spherical, about 1.2 to 1.7 mm in diameter 1.2 mm
Gasterosteus aculeatus Egg Egg Buoyancy They are opaque and heavier than water. No category
Gasterosteus aculeatus Spawning conditions Spawning season This fish breeds mainly during April and May, but it is possible in tha laboratory to bring into breeding condition during most of the year ['April', 'May']
Gasterosteus aculeatus Larvae Temperature during larval development Here the embryos were kept until the yolk was completely used up. During the whole of this time the temperature remained between 18° and 19°C. Under this conditions the embryos take 6-8 days to hatch, and about 4 more days to complete absorption of yolk. 7.0 °C
Gasterosteus aculeatus Larvae Full yolk-sac resorption The larva continues to grow by absorption of the yolk which is completely used up 4 days after hatching, giving the larva, now about 6 mm long, a slender appearance. 4.0 °C * day
Gasterosteus aculeatus Larvae Initial larval size By the time the embryo hatches it is already 8 days old and measures 3 mm in length. About 24 hours after hathing the larva has a length of nearly 4 mm, has absorbed half of its yolk, and swims about freely. 8.0 mm
Gasterosteus aculeatus Larvae Larvae behaviour Because of the heavy yolk the larva lies on its side, occasionally swimming swiftly to settle down again at another spot. Demersal
Gasterosteus aculeatus Spawning conditions Spawning release The female lays about 100 to 150 eggs at a time. No category