Systematics and biology of the blue lanternfish, Diaphus coeruleus from the south-eastern Arabian Sea

Meera, K M and Manjebrayakath, Hashim and Sanjeevan, V N and Jayasankar, J and Ambrose, T V and Sudhakar, M (2019) Systematics and biology of the blue lanternfish, Diaphus coeruleus from the south-eastern Arabian Sea. Journal of the Marine Biological Association of the United Kingdom, 99 (1). pp. 239-248.

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Abstract

The paper presents the first detailed study on systematics, otolith structure and biology of Diaphus coeruleus, from the southeastern Arabian Sea. The closely related and co-inhabiting species D. coeruleus and D. watasei are distinguished on the basis of morphometric, meristic and otolith characters. Analysis of gut content revealed that these fishes mainly feed on deep sea squids and shrimps. Six maturation stages of gonads are identified in males (immature, quiescent, mature, ripe, spawning and spent) and five stages (immature, quiescent, mature, ripening and spawning stages) in females. Overall sex ratio deviated in favour of males (1 male: 0.2 female) and the mean fecundity was 2150 + 353 eggs. The length-weight relationship shows an overall isometric growth in males with N ¼ 76 and b ¼ 3.13 and for females with N ¼ 17 and suggests negative allometric growth (b ¼ 1.719). Otolith length (LO) and otolith weight (WO) are positively correlated to standard body length (LS) and body weight (BW).

Item Type:	Article
Uncontrolled Keywords:	Length–weight; otolith; mesopelagic fishes; myctophids; Diaphus coeruleus; south-eastern Arabian Sea
Subjects:	Fish and Fisheries > Fish biology
Divisions:	CMFRI-Kochi > Marine Capture > Fishery Resources Assessment Division Subject Area > CMFRI > CMFRI-Kochi > Marine Capture > Fishery Resources Assessment Division CMFRI-Kochi > Marine Capture > Fishery Resources Assessment Division Subject Area > CMFRI-Kochi > Marine Capture > Fishery Resources Assessment Division
Depositing User:	Mr. Arun Surendran
Date Deposited:	17 Apr 2021 10:20
Last Modified:	17 Apr 2021 10:20
URI:	http://eprints.cmfri.org.in/id/eprint/15112

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