Hiện trạng và tiềm năng phát triển nuôi cầu gai ở vùng biển Kiên Giang, Việt Nam

Nhân, Hứa Thái; Hải, Trần Ngọc; Sơn, Võ Nam; Đức, Phạm Minh; Yên, Dương Thúy; Hải, Đào Minh

doi:10.22144/ctu.jvn.2019.020

Cited by 6 publications

(2 citation statements)

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“…The density of sea urchins was low in most studied sites, and we could not find any sea urchins in some places. Compared to the previous data in these areas and other areas in Southern Vietnam [29][30][31], the density remarkably decreased. One of the main reasons we assumed for this decline is overfishing, especially in tourist areas such as Co To, Ba Mun, Cat Ba, and Ha Long.…”

Section: Discussioncontrasting

confidence: 80%

The assemblage structure of large size sea urchins (Diadematidae) in Northern Vietnam

Dang

Nozawa

Chien

et al. 2022

VJMST

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The large sea urchins (Diadematidae) are widely distributed worldwide, from temperate to tropical waters. Diadematidae is an important herbivore in the coral reef ecosystem through herbivore-algal-coral interaction, which maintains the reef’s health. Many studies of Diadematidae have been performed around world, but in Vietnam, there is little known about the ecology of this group. Here, we first investigated the assemblage structure of Diadematidae in Northern Vietnam. We observed 43 sites of representative coral reefs in Ba Mun - Co To, Cat Ba - Ha Long, and Hon Me. Based on the surveys, we found four species of considerable size sea urchins, of which the most common species is Diadema setosum (79.8% of the total), Enchinothrix calamaris (10.1%), E. diadema (8.3%), and D. savignyi (1.8%). Among three study regions, Hon Me is the most diverse. In addition, Hon Me also has the highest density of sea urchins. However, this value is generally low compared to that in Southern Vietnam and other neighboring countries. Further study is needed to investigate the ecology and reproductive biology of Diadematidae to provide fundamental information for sustainable exploitation and conservation.

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Section: Discussioncontrasting

confidence: 80%

The assemblage structure of large size sea urchins (Diadematidae) in Northern Vietnam

Dang

Nozawa

Chien

et al. 2022

VJMST

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“…This species is widely distributed in the West Indo‐Pacific, from the Red Sea Arabian Gulf to India, Australia, Japan and other parts of Asia (Lessios, Kessing, & Pearse, 2001). Black sea urchin is also harvested for food consumption in different parts of the world, but more popularly in Japan and other Southeast Asian countries (Kaneko et al., 2012; Nhan, Hai, et al, 2019; Rahman et al., 2012). This causes the over‐harvesting of natural resources of this species in many regions of the world.…”

Section: Introductionmentioning

confidence: 99%

Effects of dietary arachidonic acid on final maturation, spawning and composition of gonad of black sea urchin Diadema setosum (Leske, 1778)

et al. 2020

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This study investigated the effect of dietary arachidonic acid (ARA, 20:4n‐6) on final maturation, spawning performance and composition of the gonad of black sea urchin (Diadema setosum). Four different dietary ARA levels of 0.3 g/kg (Control diet), 1.4 g/kg (ARA 1.4), 2.5 g/kg (ARA 2.5) and 3.7 g/kg (ARA 3.7) were prepared and tested in this feeding trial for 90 days. The result showed that growth in terms of weight was not relatively affected by dietary ARA. Gonadosomatic Index (GSI) of animals were gradually increased in all the diets throughout the trial. The highest GSI level (25.7 ± 3.16%) was observed in animals fed with the diet ARA 1.4. ARA content in the gonad proportionally increased with dietary ARA levels. The highest larval survival rate (85.5 ± 5.67%) was found in diet ARA 2.5. The results of this study indicate that ARA plays an important role in the reproduction functions of black sea urchin and supplementing an appropriate level of ARA in the broodstock diet could induce the final maturation and improve reproduction of black sea urchin, but a higher level of ARA (3.7 g/kg) seems to have a negative effect on both growth rate and GSI.

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. Mối quan hệ phụ thuộc giữa giá vàng và tỷ giá ngoại tệ ở Việt Nam

Hiền¹,

Khôi²

2019

CTU Journal

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Hiện trạng và tiềm năng phát triển nuôi cầu gai ở vùng biển Kiên Giang, Việt Nam

Cited by 6 publications

References 0 publications

The assemblage structure of large size sea urchins (Diadematidae) in Northern Vietnam

The assemblage structure of large size sea urchins (Diadematidae) in Northern Vietnam

Effects of dietary arachidonic acid on final maturation, spawning and composition of gonad of black sea urchin Diadema setosum (Leske, 1778)

. Mối quan hệ phụ thuộc giữa giá vàng và tỷ giá ngoại tệ ở Việt Nam

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