Zooplankton growth rates: the influence of female size and resources on egg production of tropical marine copepods
Zooplankton growth rates: the influence of female size and resources on egg production of tropical marine copepods
复制标题
浮游动物增长率：雌性体型和资源对热带海洋桡足类产卵的影响
DOI：
--
复制
发表时间：
1998
期刊：
影响因子：
--
通讯作者：
J. Roff
中科院分区：
文献类型：
--
作者：
R. Hopcroft;J. Roff
在牙买加沃茨，对蜱螨属（Acartia）、哲水蚤属（Calanopia）、刺水蚤属（Centropages）、黄哲水蚤属（Clausocalanus）、大眼水蚤属（Corycaeus）、真哲水蚤属（Eucheata）、真棘水蚤属（Euterpina）、长刺水蚤属（Oithona）、囊水蚤属（Oncaea）、拟哲水蚤属（Paracalanus）、小哲水蚤属（Parvocalanus）、Temora和Undinula等17种桡足类的产卵量进行了测定。在当地高温下（128 °C），平均产卵量为3.2至88个卵雌-1 d-1，瞬时雌体生长量（g，产卵量）为0.04至0.87 d-1。雌虫生长与环境叶绿素浓度呈正相关（r2 = 0.44），与雌虫体型呈负相关（r2 = 0.29）。这两个变量共同解释了60%的增长变化。当叶绿素的二次项和一个长期的身体大小和叶绿素的相互作用，解释了82%的增长率的方差。产蛋率代表了桡足类建立的资源和大小依赖关系的延伸。在较小的物种（<3.5 μg）中，产卵量与先前的桡足类体细胞生长相当;在较大的物种（>3.5 μg）中，产卵量在较低的资源浓度下比桡足类体细胞生长受到损害。因此，热带桡足类的产卵量可能经常受到资源大小的限制。在增长是资源有限的条件下，我们告诫对卵生产率的计算总桡足类生产的应用。
Egg production was measured in 17 species of copepods from the genera Acartia, Calanopia, Centropages, Clausocalanus, Corycaeus, Eucheata, Euterpina, Oithona, Oncaea, Paracalanus, Parvocalanus, Temora and Undinula in Jamaican waters. At the high local temperatures (∼28 °C), mean egg production ranged from 3.2 to 88 eggs female–1 d–1, and instantaneous female growth (g, as egg production) ranged from 0.04 to 0.87 d–1. Female growth was positively related to ambient chlorophyll concentration (r2 = 0.44) and negatively to female body size (r2 = 0.29). Together these two variables explained 60% of the variation in growth. When quadratic terms for chlorophyll and a term for interaction of body size and chlorophyll were introduced, 82% of the variance in growth rate was explained. Egg production rates represent an extension of the resource and size-dependent relationship established for copepodites. In smaller species (<3.5 μg), egg production was comparable to prior copepodite somatic growth; in larger species (>3.5 μg), egg production is compromised at lower resource concentrations than copepodite somatic growth. Thus, it appears that egg production in tropical copepods may be frequently limited by resources in a size-dependent manner. Under conditions where growth is resource limited, we caution against the application of egg production rates for the calculation of total copepod production.