No detailed citation.
Species | Development state | Trait | Primary Data | Secondary Data |
Alosa alosa | Egg | Temperature for incubation | Eggs were collected by means of an egg trap and placed into 8 l McDonal jars for incubation. After a 5 day incubation at 19°C, larvae hatched | 8.0 °C |
Alosa alosa | Egg | Degree-days for incubation | After a 5 day incubation at 19°C, larvae hatched | 5.0 °C * day |
Alosa alosa | Larvae | Larvae behaviour | It has been observed that larvae would grow under the gravel, which could suggest that their photoresponse evolves from a strong positive photoresponse at hatching to negative photoresponse in the course of larval stage. […] larvae were caught near the surface | Demersal |
Alosa alosa | Larvae | Reaction to light | Previous experiments carried out on hatching larvae (from day 1 to day 3) showed that allis shad larvae photoreponse was positive at hatching. It is however, unknown as to whether this response changes with ontogenesis. […] Allis shad larvae exbited a positive photoresponse from hatching until one month old (total length = 20 mm). This behavior is not in agreement with first field observations which found larvae hidden in the substratum. | Photopositive |
Alosa alosa | Larvae | Temperature during larval development | Larvae hatched and were put in troughs, at a density c. 50 larvae l-1.Temperature varie between 18.3 and 18.6°C, dissolved oxygen between 8.4 and 7.6 mg.l-1, pH was constant at 7.6) | 50.0 °C |
Alosa alosa | Larvae | Onset of exogeneous feeding | By 3 days post-hatch [18-19°C], larvae were fed every 10 min with brine shrimp Artemia salini nauplii | 18.5 °C * day |
Oncorhynchus mykiss | Larvae | Reaction to light | Oncorhynchus mykiss yolk-sac alevins exhibit a strong negative photoresponse during their under gravel residency, which switches rapidly towards a positive one at the time of emergence | Photopositive |