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利用电子显微探针元素分析技术(EPMA)对黄海南部野生银鲳和鮸鱼的耳石进行了锶和钙沉积特征的初步分析。定量线分析结果表明,两种鱼类耳石的Sr/Ca之间存在显著的种间差异。银鲳耳石Sr/Ca比,在耳石核心及相邻处为低值区(5.86±0.92);3段Sr/Ca高值区分别为近核心部(7.88±1.28)、第1龄处(9.44±1.82)及耳石边缘(7.91±1.38);揭示银鲳孵化和早期发育应需要盐度适中的生境,当龄鱼在后期的生长中需洄游经过两段高盐生境(其中之一在第1龄时)。鮸鱼耳石Sr/Ca比波动表现为耳石核心处(7.72±0.97)高于其余部分,反映了鮸鱼孵化及初期发育阶段可能生活在高盐度生境,而当龄鱼随后阶段的生长和发育过程则会洄游至盐度有所降低的生境中进行。
The strontium and calcium deposition characteristics of otoliths of wild silver 鲳 and 鮸 fish in southern Yellow Sea were analyzed by electron microscopy (EPMA). Quantitative line analysis showed that there was a significant interspecific difference in Sr / Ca between the two otoliths. The Sr / Ca ratio of otolith is low (5.86 ± 0.92) in the otolith core and its adjacent area, while the high value of 3 Sr / Ca is near core (7.88 ± 1.28) (9.44 ± 1.82) and otolith edge (7.91 ± 1.38). It is suggested that the habitat of moderate salinity should be needed for hatching and early development of silver pomfret. At the first age). The Sr / Ca ratio of otolith otoliths was higher than that of the rest of otolith nuclei (7.72 ± 0.97), indicating that the growth and development of iguanus may be at high salinities during the early stage of hatching and initial development And developmental processes migrate to habitats where salinity is reduced.