NDLI: Growth and mating of southern African Lycoteuthis lorigera (Steenstrup, 1875) (Cephalopoda; Lycoteuthidae)

Content Provider	Springer Nature Link
Author	Hoving, H. J. T. Lipinski, M. R. Roeleveld, M. A. C. Durholtz, M. D.
Copyright Year	2006
Abstract	Lycoteuthis lorigera is an oceanic squid that is abundant in the Benguela system. Little is known about the biology of this squid except that it is eaten in large numbers by numerous oceanic predators and that males grow to larger size than females, which is unique for oegopsid squid. The aim of this study was to better understand the biology of this species by investigating its age and growth, as well as its mating system. Toward this end, the age of 110 individuals, ranging from 35 to 110 mm, was estimated by counting statolith growth increments. Estimates of age ranged from 131 to 315 days and varied with mantle length. No significant differences were found in the size of males and females of equivalent ages. The relationship between ML and age for both sexes was best described by an exponential growth curve, probably because no early life stages were aged in this study. Only one mature male (ML 160 mm) was aged, and preliminary estimates suggest it was 386 days old. Instantaneous growth rates were low (0.54% ML/day and 1.4% BM/day) but consistent with enoploteuthid growth rates. When the growth rate of L. lorigera was corrected for temperature encountered during the animal’s life, the growth rate was fast (0.47% BM/degree-days) and consistent with the hypothesis that small cephalopods grow fast and that large cephalopods grow older, rather than fast. Mature females were often mated and had spermatangia in a seminal receptacle on the dorsal pouch behind the nuchal cartilage. Males probably transfer spermatangia to the females using their long second and/or third arm pair since the paired terminal organs open far from the mantle opening.
Starting Page	259
Ending Page	270
Page Count	12
File Format	PDF
ISSN	09603166
Journal	Reviews in Fish Biology and Fisheries
Volume Number	17
Issue Number	2-3
e-ISSN	15735184
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2006-12-23
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Lycoteuthis lorigera Growth rate Reproduction Ageing Statoliths Zoology Hydrobiology
Content Type	Text
Resource Type	Article
Subject	Aquatic Science

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