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Reproduction in the deepwater squid Moroteuthis ingens, what does it cost?

journal contribution
posted on 2023-05-16, 15:30 authored by Jackson, GD, Jayson SemmensJayson Semmens, Phillips, K, Jackson, CH
The cost of reproduction for the terminal spawning onychoteuthid squid, Moroteuthis ingens, was analysed using measures of condition and tissue biochemistry. Both males and females showed a dramatic drop in the weight of the gonad in stage 6 (spent) individuals. The mantle weight and nidamental gland weight of females also decreased during the maturation process. Males, however, had a marked increase in both the penis and spermatophoric complex weight in spent individuals, while female oviducal gland weight and nidamental gland length also increased in stage 6 individuals. Residual analysis indicated that testis growth was not developing at the expense of mantle growth, although there was a suggestion of cost to the fins. Females showed that the development of the ovary occurred at a cost to both the mantle and fins. Overall body condition also declined with maturity stage for both males and females, with stage 6 individuals of both sexes in poor condition. Very few females had eggs in the oviducts, suggesting that the oviducts are used as ducts instead of storage organs. Proximal analysis revealed a loss of constituents within the mantle during maturation, with an associated increase in water, indicating the remobilization of energy from the mantle to fuel reproduction. This study suggests that the digestive gland is not used as an energy store in this species. © Springer-Verlag 2004.

History

Publication title

Marine Biology

Volume

145

Issue

5

Pagination

905-916

ISSN

0025-3162

Department/School

Institute for Marine and Antarctic Studies

Publisher

Springer-Verlag

Place of publication

Germany

Repository Status

  • Restricted

Socio-economic Objectives

Fisheries - wild caught not elsewhere classified

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