Latitudinal variation in diversity and abundance of mesopelagic fishes associated with change in oceanographic variables along 110°E, south-east Indian Ocean

Latitudinal variation in diversity and abundance of mesopelagic fishes associated with change in oceanographic variables along 110°E, south-east Indian Ocean

13 pages, 7 figures, 3 tables

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Bibliographic Details
Main Authors: Olivar, M. Pilar, Beckley, Lynnath E.
Other Authors: Agencia Estatal de Investigación (España)
Format: artículo biblioteca
Language:English
Published: Elsevier 2022-04
Subjects:Ichthyoplankton, Myctophiformes, Stomiiformes, Spatial distribution, Oceanography,
Online Access:http://hdl.handle.net/10261/269658
http://dx.doi.org/10.13039/501100011033
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spelling dig-icm-es-10261-2696582022-05-16T12:16:07Z Latitudinal variation in diversity and abundance of mesopelagic fishes associated with change in oceanographic variables along 110°E, south-east Indian Ocean Olivar, M. Pilar Beckley, Lynnath E. Agencia Estatal de Investigación (España) Ichthyoplankton Myctophiformes Stomiiformes Spatial distribution Oceanography 13 pages, 7 figures, 3 tables As part of the second International Indian Ocean Expedition, an oceanic transect from 39.5°S to 11.5°S along 110°E in the south-eastern Indian Ocean enabled concurrent oceanographic measurements and sampling of early stages of mesopelagic fishes within the upper 500 m of the water column. Notable oceanographic features along the generally oligotrophic transect included an increase in surface water temperature from 12 to 28 °C from south to north and low salinities at both ends of the transect. High salinity Subtropical Surface Water was evident over the central part of the transect and low dissolved oxygen occurred at depth at the northern end where tropical waters were influenced by the Indonesian Throughflow. Throughout the study region larval fish stages were generally concentrated in the epipelagic zone. Species richness, abundance and diversity of fishes (n = 166 species) increased towards the tropical waters. The families Myctophidae (lanternfishes; 60 species), Phosichthyidae (lightfishes; 2 species) and Gonostomatidae (bristlemouths; 5 species) were numerically dominant. Clustering of integrated abundance data (0–500 m depth) revealed four major fish assemblages along the transect. When linked to oceanographic variables, multivariate multiple regression indicated that surface temperature, surface salinity and dissolved oxygen at 400 m depth provided the best fitting model explaining fish distribution patterns. Where possible, comparisons have been made with early data collected along this 110° E line in the 1960s during the first International Indian Ocean Expedition MPO acknowledges the support of her institution through the ‘Severo Ochoa Centre of Excellence’ accreditation (CEX2019-000928-S) Peer reviewed 2022-05-16T12:16:07Z 2022-05-16T12:16:07Z 2022-04 artículo http://purl.org/coar/resource_type/c_6501 Deep Sea Research - Part II - Topical Studies in Oceanography 198: 105053 (2022) 0967-0645 CEX2019-000928-S http://hdl.handle.net/10261/269658 10.1016/j.dsr2.2022.105053 http://dx.doi.org/10.13039/501100011033 en Preprint https://doi.org/10.1016/j.dsr2.2022.105053 Sí open Elsevier
institution ICM ES
collection DSpace
country España
countrycode ES
component Bibliográfico
access En linea
databasecode dig-icm-es
tag biblioteca
region Europa del Sur
libraryname Biblioteca del ICM España
language English
topic Ichthyoplankton
Myctophiformes
Stomiiformes
Spatial distribution
Oceanography
Ichthyoplankton
Myctophiformes
Stomiiformes
Spatial distribution
Oceanography
spellingShingle Ichthyoplankton
Myctophiformes
Stomiiformes
Spatial distribution
Oceanography
Ichthyoplankton
Myctophiformes
Stomiiformes
Spatial distribution
Oceanography
Olivar, M. Pilar
Beckley, Lynnath E.
Latitudinal variation in diversity and abundance of mesopelagic fishes associated with change in oceanographic variables along 110°E, south-east Indian Ocean
description 13 pages, 7 figures, 3 tables
author2 Agencia Estatal de Investigación (España)
author_facet Agencia Estatal de Investigación (España)
Olivar, M. Pilar
Beckley, Lynnath E.
format artículo
topic_facet Ichthyoplankton
Myctophiformes
Stomiiformes
Spatial distribution
Oceanography
author Olivar, M. Pilar
Beckley, Lynnath E.
author_sort Olivar, M. Pilar
title Latitudinal variation in diversity and abundance of mesopelagic fishes associated with change in oceanographic variables along 110°E, south-east Indian Ocean
title_short Latitudinal variation in diversity and abundance of mesopelagic fishes associated with change in oceanographic variables along 110°E, south-east Indian Ocean
title_full Latitudinal variation in diversity and abundance of mesopelagic fishes associated with change in oceanographic variables along 110°E, south-east Indian Ocean
title_fullStr Latitudinal variation in diversity and abundance of mesopelagic fishes associated with change in oceanographic variables along 110°E, south-east Indian Ocean
title_full_unstemmed Latitudinal variation in diversity and abundance of mesopelagic fishes associated with change in oceanographic variables along 110°E, south-east Indian Ocean
title_sort latitudinal variation in diversity and abundance of mesopelagic fishes associated with change in oceanographic variables along 110°e, south-east indian ocean
publisher Elsevier
publishDate 2022-04
url http://hdl.handle.net/10261/269658
http://dx.doi.org/10.13039/501100011033
work_keys_str_mv AT olivarmpilar latitudinalvariationindiversityandabundanceofmesopelagicfishesassociatedwithchangeinoceanographicvariablesalong110esoutheastindianocean
AT beckleylynnathe latitudinalvariationindiversityandabundanceofmesopelagicfishesassociatedwithchangeinoceanographicvariablesalong110esoutheastindianocean
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