| 摘要: |
| 于2007 年和2008 年6 月、8 月, 用大型浮游生物网对莱州湾鱼卵、仔稚鱼种类组成与数量分布进行了4 个航次调查。结果表明, 采集到11271 粒鱼卵, 隶属于4 目、15 科、22 种(不包括2个未定名物种); 仔稚鱼2942 尾, 隶属于4 目、9 科、12 种(不包括2 个未定名物种)。6 月份是莱州湾大部分鱼类主要产卵期, 鱼卵、仔稚鱼种类达25 种, 鱼卵优势种以斑(Clupanodon punctatus)和凤鲚(Coilia mystus)为主; 仔稚鱼优势种以凤鲚、梭鱼(Mugil soiuy)和斑为主。8 月份产卵的鱼类较少, 仅采集到15 种鱼卵、仔稚鱼, 优势种均以凤鲚和鲈鱼(Lateolabrax japonicus)为主。鱼卵、仔稚鱼平面分布极不均匀, 黄河、广利河和老弥河口附近海域数量较多, 莱州湾中部海域数量较少。通过SPSS 软件分析发现, 鱼卵数量与仔稚鱼、表层铵盐含量呈显著正相关(r = 0.438, 0.604, P<0.01), 与盐度、透明度呈负相关(r =－0.343, －0.329, P<0.05); 仔稚鱼数量仅与鱼卵数量和表层铵盐含量呈显著正相关(r = 0.438, 0.536, P<0.01), 与其它环境因子没有明显相关关系(P>0.05)。
|
| 关键词: 莱州湾, 鱼卵, 仔稚鱼, 分布, 环境因子 |
| DOI：10.11693/hyhz201003013013 |
| 分类号: |
| 基金项目:国家海洋公益性行业科研专项重点项目, 200805031 号; 908 专项经费项目, SD908-02-09 号 |
|
| DISTRIBUTING OF ICHTHYOPLANKTON AND THE CORRELATION WITH ENVIRONMENTAL FACTORS IN LAIZHOU BAY |
|
SONG Xiu-Kai, LIU Ai-Ying, YANG Yan-Yan, YANG Jian-Min, REN Li-Hua, LIU Li-Juan, SUN Guo-Hua, LIU Xiao-Jing
|
|
Marine Fisheries Research Institute of Shandong
|
| Abstract: |
| Composition and abundance of fish eggs and larvae were studied using 11271 eggs and 2942 larvae collected June 2007 to August 2008 in Laizhou Bay. The results showed that the eggs include 22 species from 15 families and four orders (including two unidentified species), and the larvae cover 12 species in nine families and four orders (two unidentified species). As June was an important spawning periods of most fishes in Laizhou Bay, 25 taxa of fish eggs and larvae were collected during this periods, of which the dominant fish eggs were Clupanodon punctatus, Coilia mystus and that of fish larvae were C. mystus, Mugil soiuy, and C. punctatus. During June of 2007, the average number of fish eggs and fish larvae was 81.82ind/100m3 and 5.66ind/100m3, respectively; both decreased to 63.07% and 80.39% of that in 1982. The average number of fish eggs in 2008 was approximate to that in 2007, while the number of fish larvae was 5.18 times than that of 2007, increased by 10.95% from that of 1982. During August, only 15 taxa of fish eggs and larvae were collected, in which the preponderant fish eggs and larvae were still C. mystus and Lateolabrax japonicus. During August 2007, the average number of eggs was 2.89 ind/100m3 and that number of fish larvae was 0.94ind/100m3, accounted for 14.60% and
14.69%, respectively, of that in 1982. The average quantity of fish eggs increased by 85.47% and that number of fish larvae declined slightly during August, 2008. The distribution of fish eggs and larvae in Laizhou Bay were very uneven, richer near the estuaries of Huanghe (Yellow) River, Guangli River and Laomi River, and poorer in the center of Laizhou Bay. Result of the Pearson Correlation between the amount of ichthyoplankton and same-time environmental factors shows that the fish eggs amount is positively correlated (r = 0.438, 0.604, P<0.01) with that of fish larvae, and the concentration of the surface of ammonium is negatively correlated (r =?0.343, ?0.329, P<0.05) with salinity and transparency. Meantime, only the amount of fish larvae is positively correlated (r = 0.536, P<0.01) with the surface concentration of ammonium, and other environmental factors had no remarkable relationship with the fish larvae amount.
|
| Key words: Laizhou Bay, Fish eggs, Fish larvae, Distributing, Environmental factors |
