Effects of spatial variability and colony size on the reproductive output and gonadal development cycle of the Mediterranean red coral (Corallium rubrum L.)

Tsounis, Georgios; Rossi, Sergio; Aranguren-Gassis, María; Gili, Josep Maria; Arntz, Wolf E.

Effects of spatial variability and colony size on the reproductive output and gonadal development cycle of the Mediterranean red coral (Corallium rubrum L.)

16 pages, 15 figures, 3 tables

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Main Authors:	Tsounis, Georgios, Rossi, Sergio, Aranguren-Gassis, María, Gili, Josep Maria, Arntz, Wolf E.
Format:	artículo biblioteca
Language:	English
Published:	2006-01
Online Access:	http://hdl.handle.net/10261/27301
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spelling	dig-icm-es-10261-273012020-11-12T08:12:57Z Effects of spatial variability and colony size on the reproductive output and gonadal development cycle of the Mediterranean red coral (Corallium rubrum L.) Tsounis, Georgios Rossi, Sergio Aranguren-Gassis, María Gili, Josep Maria Arntz, Wolf E. 16 pages, 15 figures, 3 tables Red coral (Corallium rubrum, L. 1758) is an over-exploited Mediterranean gorgonian. The gonadal development cycle of this gorgonian is examined at the Costa Brava (NW Mediterranean) taking into account for the first time colony size, depth and spatial horizontal variability. This study compares the gonad development and fertility in two colony size classes (colonies <6-cm height, and >10-cm height, both at 40–45-m depth), and two populations at different depths (16–18-m depth, and 40–45-m depth, both consisting of <6-cm high colonies) in a 15-month period. The fertility of seven size classes (<2 cm to >12 cm high colonies, in 2 cm intervals) was examined in the deep population, where large colonies were present. Furthermore, reproductive output was compared in 6 populations (distributed along more than 70-km coastline) one month before spawning (June). Red coral was found to be dioecious and gonochoric with a sex ratio of 1:1, which differs from other NW Mediterranean populations. On the other hand, fertility of different size classes indicates that small colonies of 2-cm height already produce gonads, which is in line with previous studies. Female and male polyp fertility and sperm sac size increase significantly with colony size [sperm sac diameter: 476±144 μm (mean±SD) and 305±150 μm in the >10-cm and <6-cm height colonies, respectively), whereas no significant effect on oocyte diameter was found (oocyte diameter: 373.7±18.7 μm). Depth staggered spawning, that is, an earlier release of gonads in the shallow populations, was observed in summer 2003, coinciding with the highest temperature gradient between shallow and deep water during the study period. Colonies of <6-cm height were significantly less fertile than colonies >12 cm, thus the recommendation of this study is that a minimum height should be incorporated into fishing regulations. The six studied populations at the Costa Brava showed a comparable reproductive potential, which demonstrates little variability within the homogenous population structure and range of size classes (due to overharvesting) found at the Costa Brava. The study of reproductive output is an important tool for ecosystem management, and this work recommends basing specific exploitation laws for distinctive populations on colony size, which is found to have a larger effect on reproductive potential than mesoscale variability G. Tsounis was supported by a Ph.D. scholarship from the University of Bremen, Germany. This study was supported by a IFOP grant from the Generalitat de Catalunya (Spain) Peer reviewed 2010-08-27T10:08:00Z 2010-08-27T10:08:00Z 2006-01 artículo http://purl.org/coar/resource_type/c_6501 Marine Biology 148(3): 513-527 (2006) 0025-3162 http://hdl.handle.net/10261/27301 10.1007/s00227-005-0100-8 en https://doi.org/10.1007/s00227-005-0100-8 none 5867 bytes application/pdf
institution	ICM ES
collection	DSpace
country	España
countrycode	ES
component	Bibliográfico
access	En linea
databasecode	dig-icm-es
tag	biblioteca
region	Europa del Sur
libraryname	Biblioteca del ICM España
language	English
description	16 pages, 15 figures, 3 tables
format	artículo
author	Tsounis, Georgios Rossi, Sergio Aranguren-Gassis, María Gili, Josep Maria Arntz, Wolf E.
spellingShingle	Tsounis, Georgios Rossi, Sergio Aranguren-Gassis, María Gili, Josep Maria Arntz, Wolf E. Effects of spatial variability and colony size on the reproductive output and gonadal development cycle of the Mediterranean red coral (Corallium rubrum L.)
author_facet	Tsounis, Georgios Rossi, Sergio Aranguren-Gassis, María Gili, Josep Maria Arntz, Wolf E.
author_sort	Tsounis, Georgios
title	Effects of spatial variability and colony size on the reproductive output and gonadal development cycle of the Mediterranean red coral (Corallium rubrum L.)
title_short	Effects of spatial variability and colony size on the reproductive output and gonadal development cycle of the Mediterranean red coral (Corallium rubrum L.)
title_full	Effects of spatial variability and colony size on the reproductive output and gonadal development cycle of the Mediterranean red coral (Corallium rubrum L.)
title_fullStr	Effects of spatial variability and colony size on the reproductive output and gonadal development cycle of the Mediterranean red coral (Corallium rubrum L.)
title_full_unstemmed	Effects of spatial variability and colony size on the reproductive output and gonadal development cycle of the Mediterranean red coral (Corallium rubrum L.)
title_sort	effects of spatial variability and colony size on the reproductive output and gonadal development cycle of the mediterranean red coral (corallium rubrum l.)
publishDate	2006-01
url	http://hdl.handle.net/10261/27301
work_keys_str_mv	AT tsounisgeorgios effectsofspatialvariabilityandcolonysizeonthereproductiveoutputandgonadaldevelopmentcycleofthemediterraneanredcoralcoralliumrubruml AT rossisergio effectsofspatialvariabilityandcolonysizeonthereproductiveoutputandgonadaldevelopmentcycleofthemediterraneanredcoralcoralliumrubruml AT arangurengassismaria effectsofspatialvariabilityandcolonysizeonthereproductiveoutputandgonadaldevelopmentcycleofthemediterraneanredcoralcoralliumrubruml AT gilijosepmaria effectsofspatialvariabilityandcolonysizeonthereproductiveoutputandgonadaldevelopmentcycleofthemediterraneanredcoralcoralliumrubruml AT arntzwolfe effectsofspatialvariabilityandcolonysizeonthereproductiveoutputandgonadaldevelopmentcycleofthemediterraneanredcoralcoralliumrubruml
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Effects of spatial variability and colony size on the reproductive output and gonadal development cycle of the Mediterranean red coral (Corallium rubrum L.)

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