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, Maria; Gili, Josep-Marı́a; Arntz, Wolf

doi:10.1007/s00227-005-0100-8

Cited by 90 publications

(76 citation statements)

References 38 publications

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“…Deep and shallow populations were found to have a synchronous female sexual products development in the two depths investigated (no significant differences were found) with two cohorts (the first of immature, < 400 µm and the second of mature <400 µm diameter), confirming the statement of Tsounis et al (2006a) reported for shallow samples in Spain, with deep female products that appeared slightly bigger and larger than the shallow ones. The size of female and male sexual products at the two depths was similar to those observed in other red coral populations sampled just before the release season in shallow waters Tsounis et al, 2006a).…”

Section: Discussionsupporting

confidence: 79%

“…Male colonies release floating sperm cells that find their way to female specimens, where internal fertilization takes place. Red coral is an internal brooder, reproduces annually during spring-early summer (Vighi, 1970(Vighi, , 1972Santangelo et al, 2003;Tsounis et al, 2006a) and planulae have limited dispersal capabilities (Weinberg, 1979;Bramanti et al, 2005). Moreover, this species is characterized by a higher recruitment rate than most of other octocoral species (Garrabou & Harmelin, 2002;Bramanti et al, 2007) and reaches sexual maturity at 3-4yr Gallmetzer et al, 2010;Bramanti et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

“…In general, in shallow areas, because of the stronger harvesting pressure (Garrabou & Harmelin, 2002;Tsounis et al, 2006a;Rossi et al, 2008;Bavestrello et al, 2009;MonteroSerra et al, 2015), the populations (above a depth of 50 m) show more dense patches with smaller colonies compared to the deep ones (below a depth of 50 m), which are more sparse and large sized. In addition, different genetic structure among populations dwelling at different depths was reported (Cannas et al, 2011;Costantini et al, 2011;Cannas et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…Studies on demography (Santangelo & Abbiati, 2001;Garrabou & Harmelin, 2002), reproduction (Vighi 1972;Santangelo et al, 2003;Torrents et al, 2005;Tsounis et al, 2006a;Torrents & Garrabou, 2011;Bramanti et al, 2014), recruitment, settlement and mortality (Garrabou and Harmelin 2002;Bramanti et al, 2003Bramanti et al, , 2005Bramanti et al, , 2007, growth (Marschal et al, 2004;Bramanti et al, 2005;Gallmetzer et al, 2010), distribution and space competition (Giannini et al, 2003) and feeding ecology (Tsounis et al, 2006b;Picciano & Ferrier-Pagès 2007) have contributed to a better understanding of the ecology of mainly red coral shallow populations. Because of the wide bathymetric range of this species, which leads to huge sampling limitations for deeper populations (Genin et al, 1992), little attention is given to the deeper populations (50-200 m ) (Rossi et al, 2008;Cau et al, 2015bCau et al, , 2016Angiolillo et al, 2016;Benedetti et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Reproductive patterns in deep versus shallow populations of the precious Mediterranean gorgonian Corallium rubrum (Linnaeus, 1758) (Sardinia, central-western Mediterranean)

Porcu¹,

Follesa²,

Cannas³

et al. 2017

Medit. Mar. Sci.

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This study quantifies the main reproductive features of the long-lived red coral Corallium rubrum, an octocoral endemic to the Mediterranean Sea and neighboring Atlantic areas and one of the most valuable of all marine species, at different depths (38-40 m versus 96-115 m) in north-western Sardinian waters (Central-Western Mediterranean Sea). Different population structures between depths were observed with shallow colonies smaller (in basal diameter and height) than deeper ones. Both populations were all gonochoric at polyp and colony level and fertile. The sex-ratio was balanced in the deep red corals while in the shallow ones it was significantly biased towards female probably in response to perturbations such as mass mortality events more common at shallow levels. Deep and shallow colonies were found to have a synchronous female sexual products development in the two depths investigated. C. rubrum produced large female sexual products in both depth intervals in relationship with its reproductive mode, confirming a long oogenic development. In contrast to reproductive timing, the volume occupied by female sexual products per polyp was different between the populations, being higher in the deep than in the shallow populations. C. rubrum exhibited a reproductive strategy characterized by a relative low number of female sexual products per polyp revealing significant differences among the two depth ranges analyzed with a lower mean value of sexual products in the shallow colonies (mean fecundity per polyp: 1.14) than in the deeper ones (mean fecundity per polyp: 2.09). These results indicate differences in reproductive parameters such as sexual products distribution and reproductive output (fecundity) were observed between shallow and deep populations of C. rubrum, in particular within deep dwelling populations.

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Section: Discussionsupporting

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Reproductive patterns in deep versus shallow populations of the precious Mediterranean gorgonian Corallium rubrum (Linnaeus, 1758) (Sardinia, central-western Mediterranean)

Porcu¹,

Follesa²,

Cannas³

et al. 2017

Medit. Mar. Sci.

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show abstract

“…Such a population would not yet be considered stable. In addition, studies of reproduction and size-structure in red corals have shown that reproductive output increases with size (Tsounis et al 2006). Because of this, we hypothesize that all of the populations observed, irrespective of average size of the colony, are in a phase of high initial population growth.…”

Section: Discussionmentioning

confidence: 88%

Population expansion of a new invasive coral species, Tubastraea micranthus, in the northern Gulf of Mexico

Sammarco¹,

Porter²,

Sinclair³

et al. 2014

Mar. Ecol. Prog. Ser.

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An Indo-Pacific scleractinian coral has invaded the northern Gulf of Mexico (GOM): Tubastraea micranthus. It was initially observed on one oil platform (GI-93C) near the Mississippi River. Here, we determined whether its populations were spreading and whether there was evidence of rapid expansion. We compared population density data of T. micranthus with those from T. coccinea, a congener which invaded the western Atlantic earlier. Fourteen oil/gas platforms were assessed down to 138 m depth using remotely operated vehicle digital video. Colony densities in numbers m −2 were determined for both species, and colony size was measured for T. micranthus. Data were analyzed by platform and for geographic distribution. T. micranthus densities were highest on GI-93C and on GI-116A, SW of the Mississippi River, being significantly higher than on other platforms. Densities declined radially from there. Mean colony size was highest on MC-311A, with colonies generally being >100 cm 2 . This platform is situated at the head of the Mississippi Canyon and may have been the original site of colonization. It also receives blue water instead of turbid, lower salinity water, and this species may grow better under those conditions. T. micranthus size frequency distributions were generally skewed towards 1-200 cm 2 (5 cm diameter) (sometimes > 90% of the population), suggesting that most populations are potentially in an expanding growth phase. T. coccinea densities were high (range: ~50 to 300 colonies m −2 ). Its populations were also centered SW of the Mississippi River. T. micranthus is spreading through this region, and the window for its potential eradication may be closing.

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Assessing the impact of population decline on mating system in the overexploited Mediterranean red coral

Ledoux

Frias‐Vidal

Montero‐Serra

et al. 2020

Aquatic Conservation

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Broad habitat type (mandatory) select 1-2: coastal < Broad habitat type, reef < Broad habitat type, subtidal < Broad habitat type General theme or application (mandatory) select 1-2: biodiversity < General theme or application, genetics < General theme or application, reproduction < General theme or application Broad taxonomic group or category (mandatory, if relevant to paper) select 1-2: benthos < Broad taxonomic group or category, invertebrates < Broad taxonomic group or category Impact category (mandatory, if relevant to paper) select 1-2: climate change < Impact category, fishing < Impact category http://mc.manuscriptcentral.com/aqc

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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.)

Cited by 90 publications

References 38 publications

Reproductive patterns in deep versus shallow populations of the precious Mediterranean gorgonian Corallium rubrum (Linnaeus, 1758) (Sardinia, central-western Mediterranean)

Reproductive patterns in deep versus shallow populations of the precious Mediterranean gorgonian Corallium rubrum (Linnaeus, 1758) (Sardinia, central-western Mediterranean)

Population expansion of a new invasive coral species, Tubastraea micranthus, in the northern Gulf of Mexico

Assessing the impact of population decline on mating system in the overexploited Mediterranean red coral

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