NANO alumni publication: Micronektonic fish species over three seamounts in the southwestern Indian Ocean

NANO Alumnus Pavanee Annasawmy and colleagues published the following article in the Deep Sea Research Part II: Topical Studies in Oceanography

Micronektonic fish species over three seamounts in the southwestern Indian Ocean

Cherel et al. (2020) Deep Sea Research Part II: Topical Studies in Oceanography, DOI 10.1016/j.dsr2.2020.104777

 

Abstract

Taxonomic composition, abundance and biological features of micronektonic fish were investigated using pelagic trawls conducted near and over the summits of three seamounts located in the western Indian Ocean (La Pérouse, MAD-Ridge and Walters Shoal). Mesopelagic fish from three families accounted for 80% by number of the total catch (5714 specimens, 121 taxa), namely myctophids (59%), gonostomatids (12%) and sternoptychids (9%). Whereas the gonostomatid Sigmops elongatus was the most abundant species around La Pérouse seamount, myctophids were the most diverse and dominant group by number in all three studied areas. Most myctophids were high-oceanic species, which included the numerically dominant Benthosema suborbitaleCeratoscopelus warmingiiDiaphus perspicillatusHygophum hygomii, and Lobianchia dofleini. The few remaining myctophids (Diaphus suborbitalis being the most abundant) were pseudoceanic fish, highlighting the association with landmasses. The study adds one myctophid species new to the Indian Ocean (Diaphus bertelseni), and a second record in the literature of the recently described sternoptychid Argyripnus hulleyi.

 

Keywords

  • Ceratoscopelus warmingii
  • Diaphus suborbitalis
  • Sigmops elongatus
  • Lanternfish
  • Tropical waters

Link for the publication here

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