波斯湾西北部希尔沙鲥鱼耳石微量元素的初步微化学分析:复杂洄游行为和种群结构的迹象

IF 1.8 3区 生物学 Q3 ECOLOGY Journal of Experimental Marine Biology and Ecology Pub Date : 2023-12-14 DOI:10.1016/j.jembe.2023.151981
Emad Koochaknejad , Gerard P. Closs , Matt Jarvis , Gholamreza Eskandari , Ahmad Savari , Alireza Safahieh , Malcolm Reid
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引用次数: 0

摘要

Hilsa shad (Tenualosa ilisha)是一种重要的溯河鱼类,在整个南亚地区支持重要的商业和自给渔业。利用耳石Sr:Ca和Ba:Ca剖面和年龄资料,研究了波斯湾西北部两个主要水系(Karun和Zohreh)的hilsa shad的迁徙历史。此外,利用主成分分析方法对元素比(Sr:Ca、Ba:Ca和Li:Ca)进行分析,探讨区域人口结构。尽管所有被分析的鱼类都在淡水中生活过一段时间,但研究人员还是观察到它们的运动模式存在差异,而且大多数耳石特征表明,它们会向下游的海洋/上游的淡水双重迁移。然而,河流之间存在差异:Zohreh河的大多数鱼类在其生命周期中表现为单一的下游/上游迁移,而Karun特征更为复杂,具有多次迁移和潜在的河口或淡水居住地。在对比海洋时期种群结构时,佐赫勒河鱼的耳石特征显示出较大的分离,而其他鱼则倾向于重叠,这表明佐赫勒河鱼可能与其他鱼在不同的位置饲养。虽然样本规模相对较小,但我们的研究结果为波斯湾鲥鱼的生活史和种群结构提供了一些初步的见解,为这一重要渔业的管理需求提供了信息,并建议对迁徙和种群结构进行更详细的调查。
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Preliminary microchemical analyses of North-western Persian Gulf hilsa shad otolith trace elements: Indications of complex migratory behavior and stock structure

Hilsa shad (Tenualosa ilisha) is an important anadromous fish species, supporting significant commercial and subsistence fisheries throughout south Asia. Otolith Sr:Ca and Ba:Ca profiles were used along with age data to examine the migratory history of hilsa shad from two major river systems in the northwestern Persian Gulf (Karun and Zohreh). In addition, elemental ratios (Sr:Ca, Ba:Ca, and Li:Ca) were analyzed using principal component analysis to investigate regional population structure. Variation in movement patterns was observed, though all fish analyzed had spent some time in freshwater, and most otolith signatures suggested a double downstream marine/upstream freshwater migration. There were however differences among rivers: the majority of fish from Zohreh River showed a single downstream/upstream migration through their life cycle, while Karun signatures were more complex, with multiple migrations and potential estuarine or freshwater residence. When comparing stock structure during the marine phase, the otolith signatures of Zohreh River fish showed greater separation while others tended to overlap, indicating that Zohreh fish were likely to have reared in a different location than the others. Although comprising a relatively small sample size, our results provide some preliminary insights into the life-history and stock structure of Persian Gulf hilsa shad, informing the management needs of this important fishery, and suggesting further more detailed investigations of migration and stock structure are warranted.

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来源期刊
Journal of Experimental Marine Biology and Ecology
Journal of Experimental Marine Biology and Ecology 生物-海洋与淡水生物学
CiteScore
4.30
自引率
0.00%
发文量
98
审稿时长
14 weeks
期刊介绍: The Journal of Experimental Marine Biology and Ecology provides a forum for experimental ecological research on marine organisms in relation to their environment. Topic areas include studies that focus on biochemistry, physiology, behavior, genetics, and ecological theory. The main emphasis of the Journal lies in hypothesis driven experimental work, both from the laboratory and the field. Natural experiments or descriptive studies that elucidate fundamental ecological processes are welcome. Submissions should have a broad ecological framework beyond the specific study organism or geographic region. Short communications that highlight emerging issues and exciting discoveries within five printed pages will receive a rapid turnaround. Papers describing important new analytical, computational, experimental and theoretical techniques and methods are encouraged and will be highlighted as Methodological Advances. We welcome proposals for Review Papers synthesizing a specific field within marine ecology. Finally, the journal aims to publish Special Issues at regular intervals synthesizing a particular field of marine science. All printed papers undergo a peer review process before being accepted and will receive a first decision within three months.
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