Regional and intraspecific variation in <i> Sthenoteuthis oualaniensis</i> (Cephalopoda: Ommastrephidae) morphology from the western central Pacific Ocean

Wang, Xue Hui; Liu, Bi Lin; Qiu, Yong Song; Zhang, Peng; Du, Fei Yan; Chen, Xin Jun; Su, Hang

doi:10.5343/bms.2017.1173

Cited by 7 publications

(4 citation statements)

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“…Two morphological populations of S. oualaniensis, viz., dwarf form and middle-sized form, have been identified in the South China Sea (Liu et al, 2019;Wang et al, 2019). Based on Cyt b gene sequences, Liu et al (2017) found two genetic lineages of S. oualaniensis (minor A and dominant B) inhabiting the South China, East China, and Philippine Seas.…”

Section: Population or Lineage Differentiationmentioning

confidence: 99%

“…S. oualaniensis exhibits a complex and often debated population structure across the Indian and Pacific Oceans due to high levels of regional and intraspecific variations (Nesis, 1977;Snÿder, 1998;Chembian and Mathew, 2014;Jiang et al, 2015;Liu et al, 2019;Wang et al, 2019). In the West Pacific, two groups with different ecotypes and morphological characters have been described (Nesis, 1977): a small early-maturing group (EM) without dorsal photophores occupying the tropical Pacific 10°-15°N/S, and a large late-maturing group (LM) with a big dorsal mantle photophore occurring throughout the species range.…”

Section: Introductionmentioning

confidence: 99%

“…Giant forms are thought to represent a population of delayed-maturing middle-sized females that adapt to low temperatures, low oxygen levels, and highly productive habitats with high growth rates and low metabolism rates (Nesis, 1993). Given the developing stage differences across a wide geographic range (Liu et al, 2019), morphological convergence due to similar ecological pressures (Head and Polly, 2015), and/or variation due to sexual dimorphisms (Nesis, 1993;Wang et al, 2019), morphological characters are unreliable for determining the population structure of S. oualaniensis throughout its range (Wang et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

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Biogeographic role of the Indonesian Seaway implicated by colonization history of purpleback flying squid, Sthenoteuthis oualaniensis (Lesson, 1830), in the Indo-Pacific Ocean

Weese

et al. 2022

Front. Mar. Sci.

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As a bio]diversity hotspot, the East Indies (Coral) Triangle possesses the highest biodiversity on the earth. However, evolutionary hypotheses around this area remain controversial; e.g., center of origin, center of accumulation, and center of overlap have been supported by different species. This study aims to answer the evolutionary influence of the Indonesian Seaway on the biodiversity of the Coral Triangle by recovering the evolutionary origins of a wide-ranging ommastrephid squid (Sthenoteuthis oualaniensis) based on integrated molecular and oceanographic clues from the Indo-Pacific. Three new clades were revealed; viz., clade I from the South China Sea, clade II from the northern East Indian Ocean, and clade III from the southern East Indian Ocean. These two Indian Ocean clades formed a monophyly closely related to clade IV from the Central-Southeast Pacific. Clade VI from the central Equatorial Pacific and clade V from the northern Eastern Pacific sit in basal positions of phylogenetic trees. Ancestral Sthenoteuthis was inferred to have originated from the Atlantic Ocean and sequentially dispersed to the northern East Pacific, central Equatorial Pacific, and West Pacific through the open Panama Seaway and being transported by westward North Equatorial Current. The East Indian Ocean was likely colonized by an ancestral population of clade IV from the Southeast Pacific. Westward South Equatorial Circulation could have promoted transoceanic migration of S. oualaniensis through the wide paleo-Indonesian Seaway. Sea level regression since the Miocene and the closure of the Indonesian Seaway at 4–3 Ma were responsible for the population genetic differentiation of S. oualaniensis in the Indo-Pacific. Therefore, the Indonesian Gateway played an important role in influencing marine organisms’ migration and population differentiation through controlling and reorganizing circulations in the Indo-Pacific.

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Section: Population or Lineage Differentiationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Biogeographic role of the Indonesian Seaway implicated by colonization history of purpleback flying squid, Sthenoteuthis oualaniensis (Lesson, 1830), in the Indo-Pacific Ocean

Weese

et al. 2022

Front. Mar. Sci.

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“…According to the different types of gladius, middle-sized individuals are divided into two forms: the middle-sized, typical form with double axes and the middle-sized not typical form with single axes (Jereb and Roper, 2010). Hard structures such as gladius, statoliths, and beaks are increasingly applied for stock discrimination of cephalopods (e.g., Liu et al, 2008;Fang et al, 2014;Fan et al, 2015) and show greater promise than the mantle and other body organs (Zhu et al, 2016;Wang et al, 2019). The gladius grows continuously throughout the lifetime of the species.…”

Section: Introductionmentioning

confidence: 99%

Form identification of purple flying squid (Sthenoteuthis oualaniensis) based on gladius morphology

Zhu

Lin²,

Chen³

et al. 2022

Front. Mar. Sci.

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Stock structure information is an important part of bases for understanding the dynamics of cephalopod populations. Purpleback flying squid Sthenoteuthis oualaniensis is an abundant and highly productive species in tropical and subtropical waters of the Indo-Pacific region. However, it is characterized by a complex stock structure, and the stock discrimination is an urgent priority to understand basic biology and for stock assessment and management purposes. Here, we used gladius morphology to identify and discriminate the dwarf without a dorsal photophore and middle-sized typical forms of S. oualaniensis in the South China Sea. Results showed that both forms had double axes on the gladius and females consistently had a larger gladius than males. Multivariate analyses using the gladius morphometric characteristics indicated that individuals of dwarf form without a dorsal photophore were distinguished from those of middle-sized typical form, which was evidenced by the obvious groups and significant dissimilarity of gladii of these two forms. The discrimination based on the gladius morphometric characteristics showed a high rate of accuracy, in which a global discrimination accuracy was estimated to be 92.36% for both forms without regarding sexes and 65.82% for the discrimination to form and sex. In combination, these lines of evidence indicated that individuals of dwarf without a dorsal photophore and middle-sized typical forms of S. oualaniensis can be accurately distinguished using the gladius morphometric characteristics, and these results will warrant the application of the gladius to study the stock structure of S. oualaniensis and other squid else.

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An empirical study of the design of an ecological damage compensation assessment framework for land reclamation from the sea

et al. 2023

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Regional and intraspecific variation in Sthenoteuthis oualaniensis (Cephalopoda: Ommastrephidae) morphology from the western central Pacific Ocean

Cited by 7 publications

References 0 publications

Biogeographic role of the Indonesian Seaway implicated by colonization history of purpleback flying squid, Sthenoteuthis oualaniensis (Lesson, 1830), in the Indo-Pacific Ocean

Biogeographic role of the Indonesian Seaway implicated by colonization history of purpleback flying squid, Sthenoteuthis oualaniensis (Lesson, 1830), in the Indo-Pacific Ocean

Form identification of purple flying squid (Sthenoteuthis oualaniensis) based on gladius morphology

An empirical study of the design of an ecological damage compensation assessment framework for land reclamation from the sea

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