Differentiating morpho-functional patterns of the five most common deep-sea benthic anglerfishes (Lophiiformes) from Andaman and Nicobar Islands (eastern Indian Ocean)

IF 0.8 4区 生物学 Q4 MARINE & FRESHWATER BIOLOGY Scientia Marina Pub Date : 2020-12-11 DOI:10.3989/scimar.05081.20a
M. Rajeeshkumar, Kannamkulathil Vijayan Aneesh Kumar, J. L. Otero-Ferrer, A. Lombarte, M. Hashim, N. Saravanane, Veloorkirakathil Narayanan Sanjeevan, Mallavarapu Venkata Ramana Murthy, Víctor Manuel Tuset
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引用次数: 2

Abstract

Anglerfishes are widely distributed from shallow to deep-water habitats occupying different ecological niches. To explain this adaptability, we performed a morpho-functional study on common benthic anglerfishes inhabiting the Indian deep-sea waters. Sensory capabilities of species were examined using the morphology and morphometry of sagitta otoliths (related to detection sound and hearing) and eye size (related to visual communication). We also performed an analysis of the degree of functional niche overlap using fish body traits to understand the coexistence of species. Otoliths showed a morphological pattern similar to that of other anglerfishes: an archaesulcoid sulcus acusticus and variability in the irregularity of the dorsal margin. This last feature affected the allometric relationships between the otolith morphometry and fish length, as well as the otolith relative sizes of each species. The findings suggested that bigger otoliths are associated with the increase of depth distribution of species up to 1000 m, from which it decreases. Our hypothesis is that anglerfishes with irregular otolith shapes could be linked to more nocturnal feeding behaviour because they were characterized by greater eye sizes. The results also indicated interspecific significant differences in functional traits providing a low niche overlap. Therefore, our study supports the hypothesis of an environmental and ecological specialization of benthic anglerfishes.
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安达曼和尼科巴群岛(东印度洋)五种最常见的深海底栖琵琶鱼(Lophiiformes)形态功能模式的区分
安格尔鱼广泛分布在从浅水到深水的栖息地,占据不同的生态位。为了解释这种适应性,我们对栖息在印度深海水域的常见底栖琵琶鱼进行了形态功能研究。使用矢状耳石的形态和形态计量学(与探测声音和听力有关)和眼睛大小(与视觉交流有关)来检查物种的感官能力。我们还利用鱼类的身体特征对功能生态位重叠的程度进行了分析,以了解物种的共存。耳石显示出与其他琵琶鱼相似的形态模式:古珊瑚沟和背缘不规则性的可变性。最后一个特征影响了耳石形态计量学与鱼类长度之间的异速关系,以及每个物种的耳石相对大小。研究结果表明,较大的耳石与物种深度分布的增加有关,深度分布从1000米开始减少。我们的假设是,耳石形状不规则的琵琶鱼可能与更多的夜间进食行为有关,因为它们的特征是眼睛更大。结果还表明,功能性状的种间显著差异提供了较低的生态位重叠。因此,我们的研究支持了底栖琵琶鱼在环境和生态方面的特殊化假说。
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来源期刊
Scientia Marina
Scientia Marina 生物-海洋与淡水生物学
CiteScore
2.10
自引率
0.00%
发文量
21
审稿时长
6-12 weeks
期刊介绍: Scientia Marina is the successor to Investigación Pesquera, a journal of marine sciences published since 1955 by the Institut de Ciències del Mar de Barcelona (CSIC). Scientia Marina is included in the Science Citation Index since 1998 and publishes original papers, reviews and comments concerning research in the following fields: Marine Biology and Ecology, Fisheries and Fisheries Ecology, Systematics, Faunistics and Marine Biogeography, Physical Oceanography, Chemical Oceanography, and Marine Geology. Emphasis is placed on articles of an interdisciplinary nature and of general interest.
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