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Age, Growth and Sex Ratio of the Azorean Rock-Pool Blenny, Parablennius Sanguinolentus Parvicornis

Age, Growth and Sex Ratio of the Azorean Rock-Pool Blenny, Parablennius Sanguinolentus Parvicornis
Age, Growth and Sex Ratio of the Azorean Rock-Pool Blenny, Parablennius Sanguinolentus Parvicornis
The age and population structure of Parablennius sanguinolentus parvicornis (Valenciennes) (Pisces: Blenniidae) from the Azores have been studied. Total length and weight relationships are given for each sex. Age study was based on otoliths readings. The von Bertalanffy growth function was applied to describe the growth in total length with age. At the end of the first year mean (±SD) total length was significantly different in males (7.1 ±1.5 cm) and females (6.1 ±1.2 cm). One-year-old males participate in reproduction as satellites, whereas females do not. The implications of this in early growth rate of the males is discussed. During the two most important months of the reproductive season (i.e. June and July), the sex ratio was significantly biased towards males, particularly in the larger size classes.
0025-3154
751-754
Santos, Ricardo Serrão
02159d78-e2c9-49e7-90ff-f200fa864524
Nash, Richard D.M.
37318edc-c465-4e84-bf0a-b0094b559c6e
Hawkins, Stephen J.
758fe1c1-30cd-4ed1-bb65-2471dc7c11fa
Santos, Ricardo Serrão
02159d78-e2c9-49e7-90ff-f200fa864524
Nash, Richard D.M.
37318edc-c465-4e84-bf0a-b0094b559c6e
Hawkins, Stephen J.
758fe1c1-30cd-4ed1-bb65-2471dc7c11fa

Santos, Ricardo Serrão, Nash, Richard D.M. and Hawkins, Stephen J. (1995) Age, Growth and Sex Ratio of the Azorean Rock-Pool Blenny, Parablennius Sanguinolentus Parvicornis. Journal of the Marine Biological Association of the United Kingdom, 75 (3), 751-754. (doi:10.1017/S0025315400039175).

Record type: Article

Abstract

The age and population structure of Parablennius sanguinolentus parvicornis (Valenciennes) (Pisces: Blenniidae) from the Azores have been studied. Total length and weight relationships are given for each sex. Age study was based on otoliths readings. The von Bertalanffy growth function was applied to describe the growth in total length with age. At the end of the first year mean (±SD) total length was significantly different in males (7.1 ±1.5 cm) and females (6.1 ±1.2 cm). One-year-old males participate in reproduction as satellites, whereas females do not. The implications of this in early growth rate of the males is discussed. During the two most important months of the reproductive season (i.e. June and July), the sex ratio was significantly biased towards males, particularly in the larger size classes.

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Published date: 1995

Identifiers

Local EPrints ID: 188807
URI: http://eprints.soton.ac.uk/id/eprint/188807
ISSN: 0025-3154
PURE UUID: 5698ce7c-f006-40a1-a902-a5496b840d88

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Date deposited: 27 May 2011 14:10
Last modified: 14 Mar 2024 03:33

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Author: Ricardo Serrão Santos
Author: Richard D.M. Nash

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