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- Title
Uncovering Lampris species (Actinopterygii, Lampridae) in the southwestern Atlantic Ocean: a molecular and morphometric approach.
- Authors
Terlecki, Giulia; dos Santos Rodrigues, Lucas; Kikuchi, Eidi; Abbatepaulo, Felippe Veneziani; Bosenbecker, Camila; de Araújo Freire, Marcio; da Silva Cortinhas, Maria Cristina; Proietti, Maíra Carneiro; Cardoso, Luis Gustavo
- Abstract
Recent studies on the genus Lampris revealed five cryptic species within Lampris guttatus; however, the new phylogenetic structure of the globally distributed group claims more information from the South Atlantic Ocean. The present work, with a focus on the Lampris genus fishes from the Southwest Atlantic Ocean (SWAO), aims to (i) fulfill a gap in the distribution description of the recently uncovered species from the group (ii), making comparative analysis to molecular and morphological studies on the group and (iii) easily diagnose characters to facilitate identification in the field. The analysis of partial mitochondrial cytochrome c oxidase I gene sequences (705 pb) led to the identification of Lampris australensis and Lampris megalopsis and their genetic diversity. Compared with other oceanographic regions, both species presented high haplotypic diversity and low population structure. Principal component analysis using morphometric data revealed two distinct morphotypes with a slight overlap. PC-LDA analysis also showed two well-separated groups, with a high percentage of correctly classified fish for L. australensis and L. megalopsis. We also demonstrate that both species can be morphologically distinguished. This study confirms L. megalopsis as a globally distributed species and expands the distribution of L. australensis, which can now be considered circumglobal along the subtropical waters of the southern hemisphere. Understanding species captured as bycatch in fisheries based on their correct identification is fundamental for establishing conservation and management initiatives for marine fish populations.
- Publication
Hydrobiologia, 2022, Vol 849, Issue 12, p2745
- ISSN
0018-8158
- Publication type
Article
- DOI
10.1007/s10750-022-04898-6