Gonad quality of sea urchin Paracentrotus lividus cultured in an offshore pilot-scale trial on the south-east Italian coast

2018 ◽  
Vol 24 (5) ◽  
pp. 1444-1455 ◽  
Author(s):  
M.G. Volpe ◽  
A. Fabbrocini ◽  
F. Siano ◽  
E. Coccia ◽  
G. Scordella ◽  
...  
Keyword(s):  
Sea Urchin ◽  
Paracentrotus Lividus ◽  
Pilot Scale ◽  
The South ◽  
Gonad Quality ◽  
Italian Coast

The ecological impact of the sea urchin Paracentrotus lividus (Lamarck) in Lough Ine, Ireland

1983 ◽  
Vol 300 (1101) ◽  
pp. 513-552 ◽  
Keyword(s):  
Sea Urchin ◽  
Animal Species ◽  
Paracentrotus Lividus ◽  
Coralline Algae ◽  
Diurnal Fluctuation ◽  
Tide Pool ◽  
Crustose Coralline Algae ◽  
The South ◽  
South Basin ◽  
The North

An ecological account is given of the rocky shallow sublittoral of Lough Ine, County Cork, Republic of Ireland, from low water level to about 1 m below this level. With increasing distance from the Rapids mouth a forest of laminarian algae gives way to low algal bush, and still further into the lough the sea urchin Paracentrotus lividus destroys all soft upstanding algae. Much of the grazed area becomes overgrown by crustose coralline algae. Patches of the green algae Codium fragile ssp. tomentosoides and Enteromorpha clathrata fringe the Paracentrotus graze patches. An account is given of the effects of Paracentrotus on the shallow sublittoral community. Algae in the ungrazed areas accommodate large numbers of individuals and many species of invertebrates, especially amphipods, small gastropods and small polychaetes. In grazing, Paracentrotus destroys this population and its habitat. However, the removal of these algae, and of the sediment that they trap, provides a new habitat, suitable for plant and animal species that can resist Paracentrotus . Crustose coralline algae cover much of the rock, and are burrowed into or enclose the tubes of a characteristic and entirely different polychaete fauna. On the surface of the rocks are found saddle oysters ( Anomia ephippium ), limpets ( Patella aspera ) and other hard- shelled animal species. The relations between Codium and Paracentrotus have been investigated by transfer experiments in the ‘field’ and by observations with an aquarium tank. Paracentrotus readily eats Codium , especially when the urchins are at a high population density; but Codium benefits from the clearance of other algae, and is a quick recolonist, so that on balance it benefits from the presence of the urchin. Paracentrotus feeds mainly by day, and on a steep shore some wander up into the littoral region as the tide rises and destroy Fucus serratus . This accounts for the almost complete absence of F. serratus from the North Basin. Paracentrotus does not move upwards by night. The hard-shelled animal species Anomia, Patella, Chlamys varia , adult Gibbula cineraria and Pomatoceros , found plentifully on graze patches in the North Basin, diminish in abundance southwards even within grazed areas, while the numbers of the starfish Marthasterias glacialis under the rocks increase. Experiments show that Marthasterias readily eats Anomia . These Marthasterias are quite small. As they grow bigger they move away onto muddy areas and extend their diet to include large buried lamellibranchs. Small Paracentrotus are usually found in larger numbers underneath boulders than above, while larger ones tend to come up by day onto the tops, where they form graze patches. From a study of growth lines in the interambulacral plates and from growth in cages we conclude that a horizontal diameter of 30-40 mm (with considerable variation) is reached in 3-4 years from settlement. The peak in numbers of Paracentrotus visible in the South Basin in 1979 might perhaps be ascribed to a good settlement in the warm summers of 1975 and 1976. Temperature of the shallow marginal water of the lough is subject to diurnal fluctuation, as in a tide pool, and can reach high levels in summer. This might favour Paracentrotus . However, numbers of Paracentrotus are probably severely reduced by predators in the South Basin. Crabs have already been implicated. It is possible that the small or half grown Marthasterias under shallow sublittoral rocks might destroy newly settled Paracentrotus , although this still has to be demonstrated.

scholarly journals The effect of fresh seaweed and a formulated diet supplemented with seaweed on the growth and gonad quality of the collector sea urchin, Tripneustes gratilla , under farm conditions

2020 ◽  
Vol 51 (10) ◽  
pp. 4087-4102
Author(s):  
Abigail J. Onomu ◽  
Niall G. Vine ◽  
Mark D. Cyrus ◽  
Brett M. Macey ◽  
John J. Bolton
Keyword(s):  
Sea Urchin ◽  
Formulated Diet ◽  
Tripneustes Gratilla ◽  
Gonad Quality

Effects of three feeding models on growth,gonad yield and gonad quality of the sea urchin(Strongylocentrotus intermedius)

2013 ◽  
Vol 37 (7) ◽  
pp. 1050 ◽  
Author(s):  
Haisen ZHOU ◽  
Yaqing CHANG ◽  
Shibin LUO ◽  
Xiaofei TIAN ◽  
Weijie ZHANG ◽  
...  
Keyword(s):  
Sea Urchin ◽  
Strongylocentrotus Intermedius ◽  
Gonad Quality

Improvement of gonad quality of the sea urchin Mesocentrotus nudus fed the kelp Saccharina japonica during offshore cage culture

Aquaculture ◽  
2017 ◽  
Vol 477 ◽  
pp. 50-61 ◽  
Author(s):  
Satomi Takagi ◽  
Yuko Murata ◽  
Eri Inomata ◽  
Hikaru Endo ◽  
Masakazu N. Aoki ◽  
...  
Keyword(s):  
Sea Urchin ◽  
Saccharina Japonica ◽  
Cage Culture ◽  
Mesocentrotus Nudus ◽  
Gonad Quality

scholarly journals Gonad quality of sea urchin Tripneustis gratilla with different seaweed diets

2020 ◽  
Vol 18 (2) ◽  
pp. 214-221
Author(s):  
Agnette Tjendanawangi ◽  
Nicodemus Dahoklory
Keyword(s):  
Sea Urchin ◽  
Maturity Index ◽  
Second Phase ◽  
Gonad Weight ◽  
Carotene Content ◽  
Gonad Maturity ◽  
Potential Source ◽  
Gonad Quality ◽  
Β Carotene

ABSTRACT   Gonad quality of sea urchin Tripneustis gratilla is influenced by consumed seaweed type. Therefore, this study was conducted to determine the type of seaweed as potential source of carotenoids and produce a good quality of sea urchin gonad. The study was conducted in two phases, namely first phase was to obtain the content of carotenoids and β-carotene from several species of seaweed; and second phase was to testify the seaweed that produced high quality of sea urchin gonad.This study used completely randomized design with 4 treatmens of macroalgae diets, namely: 1. Enhalus sp., 2. Sargassum sp., 3. Ulva sp., and 4. Eucheuma sp. Each treament was repeated three times. Measured parameters were gonad weight, gonad maturity index, gonad color quality, and gonad texture.  The study result showed that Enhalus contained the highest carotenoid and β-carotene content with 1409.53 and 639.37 mg/kg respectively. The highest gonad weight was 2.8 g; gonad color and texture was good (score 3); and the highest gonad maturity index was 5.4% that obtained from sea urchin fed with Enhalus. Therefore, this study concludes that Enhalus is potential source of carotenoids for sea urchin T. gratilla diet that will produce a good quality of gonad.   Keywords: carotenoid, diet, gonad quality, sea urchin, seaweed.

scholarly journals Protein Level and Protein Energy Ratio that Produce the Best Gonad Quality of Sea Urchin Tripneustes Gratilla

2014 ◽  
Vol 5 (1) ◽  
pp. 95
Author(s):  
Agnette T ◽  
M. Zairin ◽  
Mokoginta Mokoginta ◽  
M. A. Suprayudi ◽  
F. Yulianda
Keyword(s):  
Sea Urchin ◽  
Protein Level ◽  
Energy Ratio ◽  
Protein Energy ◽  
Tripneustes Gratilla ◽  
Gonad Quality
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