Establishing optimal broodstock sex ratios for the royal gramma (Gramma loreto) in small scale system aquaculture

Establishing optimal broodstock sex ratios for the royal gramma (Gramma loreto) in small scale system aquaculture
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在小规模系统水产养殖中建立皇家格拉玛(Gramma loreto)的最佳亲鱼性别比例

DOI:
10.1016/j.aquaculture.2021.736931
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发表时间:
2021
期刊:
影响因子:
4.5
通讯作者:
Anderson, P.
Anderson, P.
中科院分区:
农林科学1区
文献类型:
--
作者:
Vacco, V.;Camacho, C.;Guinovart, C.;Anderson, P.

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皇家葛兰(Gramma洛雷托)在其珊瑚礁栖息地易受人为影响,被视为污染的“指示”物种。它也是大量捕捞的水族馆贸易,是进口海洋水族馆鱼类物种进入美国的前1%,本研究的目的是建立最佳的亲鱼群体的性别比例水产养殖作为一种替代野生捕捞,同时平衡领土侵略。在6个23 L的水族箱中进行了3次为期2个月的繁殖试验,其中饲养了1只雄性和1只、2只或3只雌性。在试验期间,每个水族馆每周拍摄一小时的第一天,以记录求偶,巢穴使用和厌恶行为。用JWatcher软件量化行为,并在重复测量ANOVA中进行分析。结果表明,在小水族馆,一个男性对两个女性的性别比例可能是最佳的产卵,因为求爱和巢使用行为的优化,而厌恶的行为是温和的。过去的努力,水产养殖的物种通常进行亲鱼性别比例为1:1。这些结果提供了提高该物种商业化水产养殖生产力的潜力。
The royal gramma(Gramma loreto)is vulnerable to anthropogenic impact in its coral reef habitats, and is deemed an “indicator” species of pollution. It is also heavily fished for the aquarium trade, being among the top 1% of imported marine aquarium fish species into the U.S. The objective of this study was to establish optimal sex ratios of broodstock groups for aquaculture as an alternative to wild capture, while balancing territorial aggression. Three two-month breeding trials were carried out in six 23 L aquaria stocked with one male and one, two, or three females. During the trials, each aquarium was filmed weekly for one hour at first light to record courtship, nest use, and aversive behaviors. Behaviors were quantified with JWatcher software and analyzed in repeated measures ANOVAs. Results suggest that in small aquaria, a sex ratio of one male to two females may be optimal for spawning because courtship and nest use behaviors are optimized while aversive behaviors are moderated. Past efforts to aquaculture the species have typically been conducted at broodstock sex ratios of 1:1. These results offer the potential to increase productivity of commercial aquaculture of the species.
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