Divergent genetic diversity reveals contrasting demographic histories in two commercially important snappers

Q3 Agricultural and Biological Sciences

Ecological Genetics and Genomics Pub Date : 2025-10-06 DOI:10.1016/j.egg.2025.100414

Achmad Zamroni, Muhammad Taufik, Tri Ernawati, Erfind Nurdin, Pratiwi Lestari, Moh Fauzi

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Abstract

This study investigates the genetic architecture and demographic history of two commercial snapper species, Lutjanus erythropterus and Pinjalo pinjalo, in Indonesian waters to fill a knowledge gap regarding the evolutionary responses of co-distributed species within a complex marine landscape. By analyzing 450 base pairs of mitochondrial DNA control region (D-loop) sequences from 29 L. erythropterus and 26 P. pinjalo samples from five locations, this study reveals starkly different genetic patterns. The results show that L. erythropterus possesses very high genetic diversity (Hd = 0.98030; π = 0.01817) and exhibits no significant population structure (Φst = 0.00777; P > 0.05), consistent with a model of a single panmictic population that has undergone a past demographic expansion. Conversely, P. pinjalo exhibits substantially lower genetic diversity (Hd = 0,52615; π = 0,01068) and no signal of expansion, indicating a stable long-term demographic history and potential complex population dynamics. These findings conclude that these two sympatric species exhibit fundamentally different evolutionary trajectories, likely mediated by intrinsic biological differences in responding to the same historical environmental changes. The implications of these findings are highly significant for fisheries management, rejecting a "one-size-fits-all" approach and underscoring the urgent need to develop species-specific management strategies to ensure the sustainability of vital fishery resources in Indonesia.

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不同的遗传多样性揭示了两种商业上重要的鲷鱼的对比人口历史

本研究调查了印度尼西亚水域两种商业鲷鱼（Lutjanus erythropterus和Pinjalo Pinjalo）的遗传结构和人口统计学历史，以填补有关复杂海洋景观中共分布物种进化反应的知识空白。通过对来自5个地点的29只红腹龙骨和26只平加洛龙骨的450个碱基对线粒体DNA控制区（D-loop）序列的分析，揭示了截然不同的遗传模式。结果表明，L. erythropterus具有非常高的遗传多样性（Hd = 0.98030; π = 0.01817），种群结构不明显（Φst = 0.00777; P > 0.05），符合过去人口扩张的单一泛疫种群模型。相反，平加洛的遗传多样性明显较低（Hd = 0,52615; π = 0,01068），且没有扩张的迹象，表明平加洛具有稳定的长期人口历史和潜在的复杂种群动态。这些发现表明，这两个同域物种表现出根本不同的进化轨迹，可能是由于对相同历史环境变化的内在生物学差异所介导的。这些研究结果对渔业管理具有重要意义，它拒绝“一刀切”的做法，并强调迫切需要制定针对特定物种的管理战略，以确保印度尼西亚重要渔业资源的可持续性。

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来源期刊

Ecological Genetics and Genomics Agricultural and Biological Sciences-Ecology, Evolution, Behavior and Systematics

CiteScore

1.80

自引率

0.00%

发文量

期刊介绍： Ecological Genetics and Genomics publishes ecological studies of broad interest that provide significant insight into ecological interactions or/ and species diversification. New data in these areas are published as research papers, or methods and resource reports that provide novel information on technologies or tools that will be of interest to a broad readership. Complete data sets are shared where appropriate. The journal also provides Reviews, and Perspectives articles, which present commentary on the latest advances published both here and elsewhere, placing such progress in its broader biological context. Topics include: -metagenomics -population genetics/genomics -evolutionary ecology -conservation and molecular adaptation -speciation genetics -environmental and marine genomics -ecological simulation -genomic divergence of organisms