Laramore Susan, Albright Erica
Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 US 1 North, Fort Pierce, FL, 34946, USA.
BMC Zool. 2025 Mar 4;10(1):6. doi: 10.1186/s40850-025-00227-1.
The amphipod Parhyale hawaiensis is a tropical species and of interest for use as a live feed in warm water marine aquaculture. Prior to the establishment of large scale culture optimal culture conditions need to be determined. The effects of temperature (20 °C, 23 °C, 26 °C, and 29 °C) on juvenile growth, survival, and generation time of the marine amphipod P. hawaiensis were assessed in this study. Growth was followed for 12 weeks, survival for 16 weeks and hatchling-to-hatchling generation time for 20 weeks. During juvenile production data concerning precopula behavior and mating pair productivity were obtained. Higher growth (length, weight) was seen at 26 °C (4.4 ± 0.58 mm, 2.8 ± 1.4 mg) and 29 °C (4.6 ± 0.8 mm, 2.3 ± 0.89 mg) and higher survival at 23 °C (25.2 ± 12.2%) and 26 °C (31.9 ± 3.2%). The hatchling-to-hatchling generation time at 26 °C and 29 °C was 16 weeks but was not determined at lower temperatures, as no hatchlings were observed by 20 weeks. Mating pairs were formed within two days and the productivity rate of mating pairs was 1.32 ± 0.31 juveniles per pair, at ambient room temperature (~ 21 °C). The data suggests culturing P. hawaiensis at 26 °C would enhance production. This study provides valuable data that may be used to establish large-scale production of this species.
夏威夷长腹剑水蚤是一种热带物种，有望用作温水海水养殖中的活饲料。在建立大规模养殖之前，需要确定最佳养殖条件。本研究评估了温度（20℃、23℃、26℃和29℃）对海洋长腹剑水蚤幼体生长、存活及世代时间的影响。观察生长12周、存活16周以及从孵化到孵化的世代时间20周。在幼体培育过程中，获取了有关交配前行为和配对繁殖力的数据。在26℃（4.4±0.58毫米，2.8±1.4毫克）和29℃（4.6±0.8毫米，2.3±0.89毫克）时生长更快，在23℃（25.2±12.2%）和26℃（31.9±3.2%）时存活率更高。26℃和29℃时从孵化到孵化的世代时间为16周，但在较低温度下未测定，因为到20周时未观察到幼体。在室温（约21℃）下，配对在两天内形成，配对繁殖力为每对1.32±0.31个幼体。数据表明在26℃养殖夏威夷长腹剑水蚤可提高产量。本研究提供了有价值的数据，可用于建立该物种的大规模生产。
