Age and growth of three species of clupeids from Kiribati, tropical central south Pacific
Age and growth of three species of clupeids from Kiribati, tropical central south Pacific
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热带中南太平洋基里巴斯三种鲱鱼的年龄和生长
DOI：
10.1111/j.1095-8649.1993.tb00413.x
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发表时间：
1993
影响因子：
2
通讯作者：
N. Rawlinson
中科院分区：
文献类型：
--
作者：
D. Milton;S. Blaber;N. Rawlinson
采用耳石生长计数法研究了基里巴斯4个地点3种广泛分布的热带鲱科鱼类Amblygaster sirm、Herklotsichthys quadramaculatus和Spratelloides delicatulus的年龄和生长。钝腹海蜇生长到230毫米s.l.和130克，并在所有地点生活长达2年。四斑Herklotsichthys quadramaculatus生长至110 mm，15 g，寿命达1年，白色S.幼鱼体长66 mm，体重2.5 g，可存活4-5个月。在这两个地点，除了S外，其他物种的长度增长率几乎没有差异。delicatulus在一个网站。在死亡率最高的生命早期阶段，所有物种都以牺牲体重增长为代价迅速增长长度，从而减少了它们在这个生命阶段所花费的时间。体重与年龄之间的关系在H. quadramaculatus和S. delicatulus，但这些差异缩小鱼的大小增加。Herklotsichthys quadramaculatus也增长更迅速的重量在前3个月比其他物种。三个物种之间的增长比较表明，所有增长的长度在前2个月以相似的速度。纤细小飞蝗在2月龄时性成熟，随后的生长速度比其他物种慢。4个月后A. sirm比H生长快。四斑的基里巴斯的这些物种的长度和重量的增长率进行了比较，从印度太平洋的其他地区。有显著性差异：A. sirm在基里巴斯比其他地方生长得更大; H. quadramaculatus增长率在所有网站在前2个月，但基里巴斯鱼类的增长率下降，他们达到了一个较小的渐近大小比其他地方; S。来自基里巴斯的delicatulus在长度上以与所罗门群岛的鱼相似的速率生长，但是在相同的年龄在重量上显著更轻。这些短寿命的热带物种的相对生长性能进行了比较，温带鲱。尽管温带种的生长速度较慢，但所有种的生长表现相似，这表明鲱类在某些生活史性状上的系统发育保守性延伸到生长。一些热带鲱类的生长率的区域和地方差异与大多数鲱类物种之间的差异一样大。
The age and growth of three widely distributed tropical clupeids, Amblygaster sirm, Herklotsichthys quadrimaculatus and Spratelloides delicatulus at four sites in Kiribati were examined by otolith increment counts. Amblygaster sirm grew to 230 mm s.l. and 130 g and lived for up to 2 years at all sites. Herklotsichthys quadrimaculatus grew to 110 mm and 15 g and lived up to 1 year; white S. delicatulus grew to 66 mm and 2.5 g and lived for 4-5 months. There was little difference in the rate of growth in length of any of the species at the sites, except for S. delicatulus at one site. All species grew rapidly in length at the expense of growth in weight during the early life-stages when mortality is highest, hence reducing the time they spend in this life-stage. The relationship between weight and age varied between the sites for H. quadrimaculatus and S. delicatulus, but these differences narrowed as fish size increased. Herklotsichthys quadrimaculatus also grew more rapidly in weight during the first 3 months than the other species. Growth comparisons between the three species showed that all grew in length at similar rates for the first 2 months. Spratelloides delicatulus became sexually mature at 2 months of age and subsequently grew more slowly than the other species. After 4 months A. sirm grew faster than H. quadrimaculatus. The rates of growth in length and weight of these species from Kiribati were compared with those from other regions of the Indo-Pacific. There were significant differences: A. sirm grew to a larger size in Kiribati than elsewhere; H. quadrimaculatus grew at a similar rate at all sites during the first 2 months, but then the growth rate of Kiribati fish declined and they reached a smaller asymptotic size than elsewhere; S. delicatulus from Kiribati grew in length at similar rates to Solomon Islands fish, but were significantly lighter in weight at the same age. The relative growth performance of these short-lived tropical species was compared to that of temperate clupeids. All species showed similar growth performance despite the slower growth rates of temperate species, which suggests that the clupeoids' phylogenetic conservatism in some life history traits extends to growth. Regional and local differences in growth rates of some tropical clupeids are as large as those found among most clupeid species.