Annual Gametogenesis Patterns in Two High-Latitude Corals, Alveopora japonica and Oulastrea crispata, from Jeju Island, South Korea

Park, Jin-Soo; Keshavmurthy, Shashank; Subramaniam, Thatchaneshkanth; Park, Sang-Ryul; Kang, Chang‐Keun; Choi, Kwang-Sik

doi:10.1007/s12237-019-00539-9

Cited by 4 publications

(6 citation statements)

References 23 publications

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“…As was observed in P. pulchellus, and in other species belonging to the same family, such as Goniocorella dumosa and Solenosmilia variabilis (Burgess and Babcock, 2005), during the final phases of oogenesis in scleractinians and more generally in anthozoans, the nucleus migrates to the cell periphery and adheres to the plasma membrane (Szmant-Froelich et al, 1985). The typical U-shaped phase (in which the nucleus becomes indented assuming a sickle) that is observed in some scleractinians (e.g., Goffredo et al, 2005;Shikina et al, 2012;Park et al, 2020) was not observed in P. pulchellus, as in no other species within the Caryophylliidae family, such as G. dumosa, S. variabilis (Burgess and Babcock, 2005;Pires et al, 2014), Desmophyllum pertusum (Brooke and Järnegren, 2013;Pires et al, 2014), and C. ambrosia, C. sequenzae and C. cornuformis .…”

Section: Female Gametogenesismentioning

confidence: 91%

Sexual reproduction and biometry of the non-zooxanthellate papillose cup coral Paracyathus pulchellus

Marchini

Fossati²,

Cerpelloni³

et al. 2022

Front. Mar. Sci.

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Basic information on the reproductive biology of many scleractinian corals species is limited or entirely lacking, particularly from temperate zones, though it is essential for a better understanding of their ecology. This study describes the morphological aspects and the annual cycle of gametogenesis and biometric parameterss of the papillose cup coral Paracyathus pulchellus collected at Palinuro (Italy, Southern Tyrrhenian Sea), filling a knowledge gap about the reproductive biology of a widespread Mediterranean and Northern Atlantic coral. Samples of P. pulchellus were collected by SCUBA diving between 5- and 10-meters depth during 18 monthly collections from June 2010 to December 2011. Sexually active polyps displayed either oocytes or spermaries, indicating that P. pulchellus was gonochoric. The sex ratio of sexually active polyps was 1:1. Gametogenesis began with undifferentiated germ cells arose in the gastrodermis that migrated towards the mesoglea of the mesentery where they completed the development. During spermatogenesis, spermary diameter increased from 25 to 83 µm. Oocyte diameter ranged from 9 to 146 µm and during oogenesis the nucleus/cytoplasm ratio decreased due to the accumulation of yolk. The nucleus migrated to the periphery of the oocyte adhering closely to the cell membrane. No embryo was observed in the coelenteric cavity of the polyps, suggesting an external development of planktotrophic larvae due to the small-sized mature oocytes and a possible broadcast spawning reproductive mode. Gonadal index of both females and males increased significantly from August until November and fertilization took place from November to January. Only sexually inactive individuals were observed from February to April, suggesting a quiescence period in both males and females. Seasonal variations in water temperature and photoperiod may have a key role in regulating gametogenesis. The analysis of the main biometric parameters (polyp width, height, dry skeletal mass, volume, surface/volume ratio and bulk skeletal density) showed a negative correlation between size and skeletal density, and no sexual dimorphism.

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Section: Female Gametogenesismentioning

confidence: 91%

Sexual reproduction and biometry of the non-zooxanthellate papillose cup coral Paracyathus pulchellus

Marchini

Fossati²,

Cerpelloni³

et al. 2022

Front. Mar. Sci.

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“…Jeju Island is located at off the southwestern tip of the Korean peninsula, strongly influenced by the warm Tsushima Current [12,37]. As a result, Jeju Island is characterized as a warm, humid climate with four distinct seasons, and the average annual seawater temperature ranges from 13.7˚C to 25˚C [14].…”

Section: Study Sitementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Several studies have been carried out on the benthic species composition in the waters of Jeju Island [8][9][10], mainly concerning the dominant coral Alveopora japonica [11][12][13][14]. This scleractinian coral occurs commonly in non-reefal temperate waters and is widely distributed from Taiwan to Japan, including Jeju Island, off the south coast of Korea [14,15]. In Jeju Island, this species dominates mainly in the northern part of the Island (between 5-20 m in depth) and associates and shares space with mollusks, algae, and soft corals [12,16,17].…”

Section: Introductionmentioning

confidence: 99%

“…Such growth and turnover rates could be the reason for the high density of A. japonica (ranging from 58 to 155 colonies m -2 ) at several locations in Jeju [12,17]. Furthermore, in Jeju, this species recruits and re-populates abundantly with an estimated recruitment rate of 7.8 colonies m 2 yr -1 via sexual reproduction [13,14]. A detailed study on the assemblage of molluscans association with A. japonica collected from several locations in Jeju has been reported by Noseworthy et al [2016].…”

Section: Introductionmentioning

confidence: 99%

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Dominance of the scleractinian coral Alveopora japonica in the barren subtidal hard bottom of high-latitude Jeju Island off the south coast of Korea assessed by high-resolution underwater images

Lee

Subramaniam

et al. 2022

PLoS ONE

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Coastal benthic communities in temperate regions have been influenced by climate change, including increasing sea-surface temperature. Nevertheless, scleractinian coral Alveopora japonica Eguchi, 1968, is thriving in shallow subtidal hard bottoms around Jeju Island, off the southern coast of Korea. The presence of this corals has negatively impacted subtidal kelp populations in Jeju Island. However, there is no study to document how the presence or absence of this coral relates to other benthic communities. This study investigated the benthos in three shallow subtidal sites (Shinheung (SH), Bukchon (BC), and Seongsan (SS)) in northern Jeju using underwater photography. Macro-benthic organisms appearing on a 1 × 20 m line transect installed at depths of 5, 10, and 15 m at each site were analyzed. Results showed that of the three sites investigated, A. japonica colonies were most abundant at BC, accounting for 45.9% and 72.8% of the total transect area at 10 m and 15 m, respectively. At SS, A. japonica occupied 15.3% of the total area at 15 m and less than 1% at 5 m and 10 m. The same at SH accounted for 10% of the total area at 5 m, and less than 1% at 10 m and 15 m. Dead and bleached colonies accounted for 1.2–11.5% and 1.8–5.7%, respectively, at 5, 10, and 15 m at three sites. At SS, canopy-forming brown algae Ecklonia cava and Sargassum spp. accounted for 20.2 and 24.3% of the total transect area, respectively, at 5 m depth. In contrast, the percent cover of E. cava and Sargassum spp. at SH and BC ranged from 0.1 to 1.8%, respectively. Moreover, non-geniculate coralline algae dominated the subtidal substrate at SH, ranging between 60.2 and 69% at 15 and 10 m. The low cover of A. japonica in SS (at 5 m) coincided with a high percent cover of canopy-forming brown algae. However, canopy-forming brown algae were rare at all depths at SH and BC and were dominated instead by coralline algae and the scleractinian corals. This study, by utilizing a non-destructive method, provides a baseline qualitative and quantitative information for understanding the site and depth-dependent distribution of A. japonica and algal populations, which is important to understand climate change related changes in benthic communities in Jeju and elsewhere.

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Climate Change and Anthropogenic Impact Around the Korean Coastal Ecosystems: Korean Long-term Marine Ecological Research (K-LTMER)

Hyun

Choi

Lee

et al. 2020

Estuaries and Coasts

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Annual Gametogenesis Patterns in Two High-Latitude Corals, Alveopora japonica and Oulastrea crispata, from Jeju Island, South Korea

Cited by 4 publications

References 23 publications

Sexual reproduction and biometry of the non-zooxanthellate papillose cup coral Paracyathus pulchellus

Sexual reproduction and biometry of the non-zooxanthellate papillose cup coral Paracyathus pulchellus

Dominance of the scleractinian coral Alveopora japonica in the barren subtidal hard bottom of high-latitude Jeju Island off the south coast of Korea assessed by high-resolution underwater images

Climate Change and Anthropogenic Impact Around the Korean Coastal Ecosystems: Korean Long-term Marine Ecological Research (K-LTMER)

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