Publication Date:
2024-04-20
Description:
An experiment was carried to study the effect of a simulated heatwave on the survival of two intertidal invertebrates, Carcinus maenas and Hemigrapsus sanguineus. Animals where collected on Helgoland and larvae hatched in the laboratory; the experiment was restricted to the larval stages. Larvae were reared in 5 replicate groups of 10-11 individuals in filtered water and fed Artemia sp. nauplii (glasses of 60 ml). There were four thermal treatments: 1: low - constant temperature; 2: smooth increase in temperature; 3: high constant temperature; 4: sudden increase in temperature simulating a short heatwave. Treatment 1 and 2 had the same average temperature (16.5 °C) as well as treatments 3 and 4 (=17.5 °C). Treatment 2 started with temperature at 15 °C and it increased 0.5 °C every day; treatment 4 started also at 15 °C and increased to 18 °C on day 1 where it remained constant until the end of the experiment. The four thermal treatments were applied to groups of larvae under three different additional treatments: (A) Food provided 24 h a day - salinity = 32 PSU; (B) Food provided 6 h a day - salinity = 32 PSU;Food provided 24 h a day - salinity = 20 PSU. The experiment was repeated with larvae from 3 females of each of the above mentioned species. The response variable was the survival proportion to the second larval stage (Zoea II).
Keywords:
Carcinus; heatwaves; Hemigrapsus; larvae
Type:
Dataset
Format:
application/vnd.openxmlformats-officedocument.spreadsheetml.sheet, 36.9 kBytes
Permalink
