Temperature dependent larval duration and survival of the western king prawn, Penaeus (Melicertus) latisulcatus Kishinouye, from Spencer Gulf, South Australia

摘要: Abstract The effects of temperature on growth, development and survival penaeid prawn larvae ultimately influence recruitment to fisheries. This is particular importance for temperate fisheries in South Australia that target the semi-tropical western king Penaeus (Melicertus) latisulcatus . P. resides at its lower limit Australia, where it restricted warmer waters gulf embayment systems. Duration were determined three larval stages reared constant temperatures: 17, 20, 22.5 25 °C. Data subsequently used construct a model generate predictions duration varying hatch dates when water was within spawning range (November–May) two different grounds Spencer Gulf (north vs. south). Results demonstrated had affected development, total survival. A power relationship found between such temperatures exerted greatest influence. Under laboratory regime, ranged from 12.7 days (at 24.4 °C) 31.3 days 17.1 °C). Stage-specific generally protozoea, while developmental variability among individuals later higher temperatures. Daily (~ 98% day − 1 ) similar 17 °C (total end survival: 36%) 25 °C 74%) treatments, suggesting upper thermal tolerance greater than mean maxima Gulf. seasonal predicted be shorter beginning season (26.8 days: 9 November) due increasing daily temperatures, compared (35.4 days: 29 May). Furthermore, significantly northern (minimum 12.7 days) southern 17.2 days) grounds. These results improve understanding factors affect dispersal, settlement