THE RELATIONSHIP BETWEEN SEASON VARIATIONS AND DEPTH LEVEL ON THE GROWTH AND SURVIVAL RATE OF PEARL OYSTER SEEDS (Pinctada maxima) IN KAPONTORI BAY,  BUTON ISLAND

The pearl oyster (P. maxima) farming particularly in the Kapontori Bay, Buton Island waters and in other areas had complained for the mass mortality of pearl oysters saplings on the shell width between 3-4 cm. The mass mortality, was allegedly as a result of changing in environmental conditions and triggered by the shift in seasons. This research aimed to determine the effect of seasonal variations in water conditions at different depth levels on growth and survival of seedlings of pearl oysters conducted on March 27, 2007 to February 28, 2008. This research was very useful for pearl oyster farming in an effort to suppress the mass mortality rates based on the appropriate level of depth and seasons. The variance analyses showed that depth levels affected the survival rates of the pearl oyster seeds significantly (P<0.01). Based on honest significantly difference test, it also showed that the percentage number of survival rate was found higher within the depth of 2m (93.33%). Based on the relationship analyses between length and weight of shell body in all depths indicated a similar growth pattern of minor allometric (b<3). The growth, survival rate, and environmental conditions based on depth levels on pearl oyster saplings were discussed in this paper. Keywords: Seasonal variation, survival rate, growth, pearl shell (P. maxima), depth level

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THE RELATIONSHIP BETWEEN SEASON VARIATIONS AND DEPTH LEVEL ON THE GROWTH AND SURVIVAL RATE OF PEARL OYSTER SEEDS (Pinctada maxima) IN KAPONTORI BAY, BUTON ISLAND

Jurnal Ilmu dan Teknologi Kelautan Tropis ◽

10.29244/jitkt.v6i1.8637 ◽

2014 ◽

Vol 6 (1) ◽

Author(s):

M S Hamzah

Keyword(s):

Survival Rate ◽

Environmental Conditions ◽

Survival Rates ◽

Pearl Oyster ◽

Mass Mortality ◽

Depth Level ◽

Growth And Survival ◽

Pearl Oysters ◽

The Relationship ◽

Similar Growth

The pearl oyster (P. maxima) farming particularly in the Kapontori Bay, Buton Island waters and in other areas had complained for the mass mortality of pearl oysters saplings on the shell width between 3-4 cm. The mass mortality, was allegedly as a result of changing in environmental conditions and triggered by the shift in seasons. This research aimed to determine the effect of seasonal variations in water conditions at different depth levels on growth and survival of seedlings of pearl oysters conducted on March 27, 2007 to February 28, 2008. This research was very useful for pearl oyster farming in an effort to suppress the mass mortality rates based on the appropriate level of depth and seasons. The variance analyses showed that depth levels affected the survival rates of the pearl oyster seeds significantly (P<0.01). Based on honest significantly difference test, it also showed that the percentage number of survival rate was found higher within the depth of 2m (93.33%). Based on the relationship analyses between length and weight of shell body in all depths indicated a similar growth pattern of minor allometric (b<3). The growth, survival rate, and environmental conditions based on depth levels on pearl oyster saplings were discussed in this paper. Keywords: Seasonal variation, survival rate, growth, pearl shell (P. maxima), depth level

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THE EFFECT OF SEASONS AND DEPTHS ON GROWTH AND SURVIVAL RATE OF PEARL OYSTER (Pinctada maxima) IN KODEK BAY, NORTH LOMBOK

Jurnal Ilmu dan Teknologi Kelautan Tropis ◽

10.29244/jitkt.v3i2.7821 ◽

2011 ◽

Vol 3 (2) ◽

Author(s):

M. S. Hamzah ◽

Bisman Nababan ◽

Bisman Nababan

Keyword(s):

Survival Rate ◽

Seedling Survival ◽

Pearl Oyster ◽

Mass Mortality ◽

Growth And Survival ◽

Transition Season ◽

Pearl Oysters ◽

Significant Difference ◽

Similar Survival ◽

Pinctada Maxima

The pearl oyster (Pinctada maxima) farming in the West Nusa Tenggara waters in particular and in other areas, complained to the mass mortality of pearl oysters saplings on shell width between 3-4 cm. The mass mortality, allegedly as a result of changing in environmental conditions and triggered by the shift in seasons. This research aimed to determine the effect of seasonal variations in water conditions at different depth levels on growth and survival of seedlings of pearl oysters conducted on March 23, 2008 to February 22, 2009. This research was very useful for pearl oyster farming in an effort to suppress the mass mortality rates based on the appropriate level of depth and seasons. Analysis of variance showed that the seasonal factors, the level of depth, and the interaction between both factors responded very significantly on pearl oyster seedling survival. The "significant difference test" showed that the interaction between season and level of 2 m depth provided the best result with 100% survival. The similar survival rate was also found at a depth of 8 m during the transition season I and the east season. For single factor (depth), the best result for growth and survival rate was found in 2 m deep during the transition season I.Keywords: Oyster sapling, Pinctada maxima, growth, mortality, season, depth, Kodek Bay

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THE EFFECT OF SEASONS AND DEPTHS ON GROWTH AND SURVIVAL RATE OF PEARL OYSTER (Pinctada maxima) IN KODEK BAY, NORTH LOMBOK

Jurnal Ilmu dan Teknologi Kelautan Tropis ◽

10.28930/jitkt.v3i2.7821 ◽

2011 ◽

Vol 3 (2) ◽

Author(s):

M. S. Hamzah ◽

Bisman Nababan ◽

Bisman Nababan

Keyword(s):

Survival Rate ◽

Seedling Survival ◽

Pearl Oyster ◽

Mass Mortality ◽

Growth And Survival ◽

Transition Season ◽

Pearl Oysters ◽

Significant Difference ◽

Similar Survival ◽

Pinctada Maxima

The pearl oyster (Pinctada maxima) farming in the West Nusa Tenggara waters in particular and in other areas, complained to the mass mortality of pearl oysters saplings on shell width between 3-4 cm. The mass mortality, allegedly as a result of changing in environmental conditions and triggered by the shift in seasons. This research aimed to determine the effect of seasonal variations in water conditions at different depth levels on growth and survival of seedlings of pearl oysters conducted on March 23, 2008 to February 22, 2009. This research was very useful for pearl oyster farming in an effort to suppress the mass mortality rates based on the appropriate level of depth and seasons. Analysis of variance showed that the seasonal factors, the level of depth, and the interaction between both factors responded very significantly on pearl oyster seedling survival. The "significant difference test" showed that the interaction between season and level of 2 m depth provided the best result with 100% survival. The similar survival rate was also found at a depth of 8 m during the transition season I and the east season. For single factor (depth), the best result for growth and survival rate was found in 2 m deep during the transition season I.Keywords: Oyster sapling, Pinctada maxima, growth, mortality, season, depth, Kodek Bay

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THE GROWTH AND SURVIVAL STUDY OF PEARL OYSTER SEEDS (Pinctada maxima) BASED ON THE DIFFERENCE DEPTH LEVELS IN KAPO NTORI BAY, BUTON ISLAND

Jurnal Ilmu dan Teknologi Kelautan Tropis ◽

10.28930/jitkt.v1i2.7870 ◽

2009 ◽

Vol 1 (2) ◽

Author(s):

M.S. Hamzah ◽

Bisman Nababan

Keyword(s):

Survival Rate ◽

Negative Impact ◽

Seedling Survival ◽

Survival Rates ◽

Environmental Parameters ◽

Pearl Oyster ◽

Growth And Survival ◽

Extreme Change ◽

The Difference ◽

Pinctada Maxima

Extreme change in sea surface temperature that might be influenced by global warming has negative impact on the pearl shell farming in Kapontori Bay.This change occurred above tolerance threshold for pearl shell juvenile survival at 3-4 cm shell wide that caused its mortality.The study was conducted from 28 February to 28 May 2008 at the Kapontory Bay,Buton island. The research aimed to identify growth and survival of pearl oyster seeds(Pinctada maxima) on differences of depth level.This research is important especially for pearl farming development in Southeast Sulawesi waters,as a reference basis in an effort to improve seedling survival of pearl oysters that are highly vulnerable to extremechange in temperature conditions. The variance analyses showed that the depth levels did not significantly affect the survival rates of the pearl oyster seeds (P>0,05). However, based on depth levels,higher survival rates (96.67%)were found on the depth of 2 m.Some environmental parameters in relation to the growth and survival rate of pearl oyster seed were discussed in this paper. Keywords:Depth levels,survival rate, growth, pearl shell, Kapontori Bay

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THE GROWTH AND SURVIVAL STUDY OF PEARL OYSTER SEEDS (Pinctada maxima) BASED ON THE DIFFERENCE DEPTH LEVELS IN KAPO NTORI BAY, BUTON ISLAND

Jurnal Ilmu dan Teknologi Kelautan Tropis ◽

10.29244/jitkt.v1i2.7870 ◽

2009 ◽

Vol 1 (2) ◽

Cited By ~ 1

Author(s):

M.S. Hamzah ◽

Bisman Nababan

Keyword(s):

Survival Rate ◽

Negative Impact ◽

Seedling Survival ◽

Survival Rates ◽

Environmental Parameters ◽

Pearl Oyster ◽

Growth And Survival ◽

Extreme Change ◽

The Difference ◽

Pinctada Maxima

Extreme change in sea surface temperature that might be influenced by global warming has negative impact on the pearl shell farming in Kapontori Bay.This change occurred above tolerance threshold for pearl shell juvenile survival at 3-4 cm shell wide that caused its mortality.The study was conducted from 28 February to 28 May 2008 at the Kapontory Bay,Buton island. The research aimed to identify growth and survival of pearl oyster seeds(Pinctada maxima) on differences of depth level.This research is important especially for pearl farming development in Southeast Sulawesi waters,as a reference basis in an effort to improve seedling survival of pearl oysters that are highly vulnerable to extremechange in temperature conditions. The variance analyses showed that the depth levels did not significantly affect the survival rates of the pearl oyster seeds (P>0,05). However, based on depth levels,higher survival rates (96.67%)were found on the depth of 2 m.Some environmental parameters in relation to the growth and survival rate of pearl oyster seed were discussed in this paper. Keywords:Depth levels,survival rate, growth, pearl shell, Kapontori Bay

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Growth and survival of the pearl oyster Pteria hirundo (L.,1758) in an intermediate stage of culture in Santa Catarina, Brazil

Brazilian Journal of Biology ◽

10.1590/s1519-69842012000100021 ◽

2012 ◽

Vol 72 (1) ◽

pp. 175-180 ◽

Cited By ~ 3

Author(s):

MCP Albuquerque ◽

R Alves ◽

ACV Zanandrea ◽

JF Ferreira ◽

CMR Melo ◽

...

Keyword(s):

Culture System ◽

Intermediate Stage ◽

Pearl Oyster ◽

Average Increase ◽

Southern Brazil ◽

Growth And Survival ◽

Life Conditions ◽

Pearl Oysters ◽

Survival And Growth ◽

Closed Environment

There are no records in Brazil for the culture of Pteridae family oysters, genus Pteria and Pinctada. The intermediate culture can be considered one of the critical stages during the oyster farming. The changes in life conditions from a semi-closed environment provided by the collector to the structures utilized for the growth represents a considerable stress factor to which the animals are subjected. The goal of the present study was to evaluate the growth and survival of the pearl oyster Pteria hirundo (Linnaeus, 1758) kept in intermediate lanterns. Seeds of P. hirundo, obtained through larviculture carried out at the Marine Molluscs Laboratory (UFSC), southern Brazil were detached from the collectors, transferred and kept in an intermediate culture system (oyster lantern). During 6 months, growth (dorso-ventral height - DVH in mm) and survival (%) were evaluated. Two size classes were tested: medium (M), between 3.4 and 4.4 mm, and large (L), bigger than 4.5 mm. The density of occupation in each floor of the lantern was 50%. At the end of the experiment, the survivals observed were 90 and 94% for the sizes M and L, respectively. Medium juveniles of Pteria hirundo had an average (Std) increase of 16.1 (±4.38) mm in the dorso-ventral height, and large juveniles an average increase of 11.4 (±3.77) mm after six months of experiment. The results observed during the intermediate stage of cultivation indicate that Pteria hirundo presents survival and growth similar to other species of pearl oysters traditionally used in the pearl industry in several countries.

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Demographic consequences of climate variation along an elevational gradient for a montane terrestrial salamander

10.1101/130922 ◽

2017 ◽

Author(s):

Nicholas M. Caruso ◽

Leslie J. Rissler

Keyword(s):

Survival Rates ◽

Elevational Gradient ◽

Vital Rates ◽

Life History Variation ◽

Growth And Survival ◽

Active Season ◽

Asymptotic Size ◽

Capture Recapture ◽

Survival And Growth ◽

The Relationship

AbstractClimate change represents a significant threat to amphibians, which are already imperiled. However, for many species, the relationship between demographic vital rates (survival and growth) and climate is unknown, which limits predictive models. Here we describe the life history variation ofPlethodon montanususing capture-recapture data over a period of four years, at five sites along an elevational gradient to determine how survival and growth vary with temperature, precipitation, and how these relationships vary with elevation. We used a hierarchical model to estimate asymptotic size and growth rate, and used a spatial Cormack-Jolly-Seber model to estimate probability of capture and survival, as well as dispersal variance. Our results show that during the active season, growth and survival rates are both positively affected by precipitation, while survival was positively affected by temperature at all elevations, the relationship between growth rates and temperature varied along the elevational gradient. Generally at lower elevations, higher temperatures led to a decrease in growth while at higher elevations the opposite was true. During the inactive season we found elevational variation in the relationship between survival and the amount of snow; at low elevations snowfall was low but survival decreased with increasing snowfall while at higher elevations increasing snowfall lead to higher survival. Our results demonstrate that understanding how the environment can affect salamander demography to develop mechanistic models, will require knowledge of the actual environmental conditions experienced by a given population as well as an understanding of the overall differences in climate at a given site.

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Effect of Hardness in 3 ppt of Water Salinity on growth and survival rates of Barb Fish (Barbus conhonius Hamilton-Buchanan)

Jurnal Akuakultur Indonesia ◽

10.19027/jai.4.17-24 ◽

2007 ◽

Vol 4 (1) ◽

pp. 17 ◽

Cited By ~ 1

Author(s):

Kukuh Nirmala ◽

R. Wulandari ◽

D. Djokosetiyanto

Keyword(s):

Growth Rate ◽

Survival Rate ◽

Survival Rates ◽

Water Hardness ◽

Water Salinity ◽

Daily Growth Rate ◽

Daily Growth ◽

Growth And Survival

This study was conducted to determine the effect of hardness on growth and survival rate of barb fish (Barbus conchonius Hamilton-Buchanan) reared in the 3 ppt of water salinity. Fish were reared in three different hardnesses, i.e., 54, 72, and 90 mg/L CaCO3 for 30 days. The results of study showed that fish reared in water hardness of 72 mg/L CaCO3 had higher daily growth rate (1.15%) compared with other treatments. Daily growth rate of fish reared in water hardness of 54 and 90 mg/L CaCO3 were 0.76 and 0.37%, respectively. There was no effect of hardness on survival rate of barb fish. Keywords: barb fish, Barbus conchonius, hardness, salinity ABSTRAK Penelitian ini bertujuan untuk mengetahui pengaruh kesadahan yang berbeda terhadap laju pertumbuhan dan tingkat kelangsungan hidup ikan barbir (Barbus conchonius Hamilton-Buchanan) yang dipelihara <a name="OLE_LINK2"></a><a name="OLE_LINK1">pada air bersalinitas 3 ppt. </a>Ikan dipelihara dalam 3 tingkat kesadahan yang berbeda, yaitu 54 mg/L CaCO3, 72 mg/L CaCO3, dan 90 mg/L CaCO3 selama 30 hari. Hasil penelitian menunjukkan bahwa laju perumbuhan harian tertinggi diperoleh pada ikan yang dipelihara pada kesadahan 72 mg/L CaCO3 (1,15%) dibandingkan dengan perlakuan lainnya. Laju pertumbuhan harian ikan yang dipelihara pada kesadahan 54 dan 90 mg/L CaCO3 masing-masing mencapai 0,76% dan 0,37%. Kelangsungan hidup ikan barb tidak dipengaruhi oleh kesadahan. Kata kunci: ikan barbir, Barbus conchonius, kesadahan, salinitas

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Control of Polychaetes by Dipping Infected Pearl Oyster on Different Salinity

Jurnal Akuakultur Indonesia ◽

10.19027/jai.3.47-49 ◽

2007 ◽

Vol 3 (2) ◽

pp. 47

Author(s):

Yani Hadiroseyani ◽

. Iswadi ◽

Daniel Djokosetyanto

Keyword(s):

Survival Rate ◽

Key Words ◽

Saline Water ◽

Pearl Oyster ◽

High Survival ◽

High Survival Rate ◽

Pearl Oysters ◽

Pinctada Maxima

Dip treatment on pearl oysters (Pinctada maxima) was conducted in different concentrations of saline water to eliminate boring polychaetes. Results shows that polychaetes leave the osyters which treated on saline water at 0 ppt, 45 ppt, and 60 ppt as long as 15 minutes each. It also shows that the oysters got high survival rate 7 days after the treatment. Key words : Polychaetes, pearl oyster, dipping, salinity ABSTRAK Pengendalian polikaeta pengebor dengan menggunakan berbagai konsentrasi larutan garam telah dilakukan pada tiram mutiara (Pinctada maxima). Berdasarkan jumlah polikaeta yang keluar, hasil percobaan ini menunjukkan bahwa perendaman dengan konsentrasi garam 0 ppt. 45 ppt, dan 60 ppt selama 15 menit lebih efektif dibandingkan pada konsentrasi 15 dan 30 ppt. Tingkat kelangsungan hidup tiram mutiara yang diamati 7 hari setelah perendaman dalam larutan garam mencapai 100%. Kata kunci : Polikaeta. tiram mutiara, perendaman. salinitas

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Mass mortality of pearl oyster (Pinctada fucata (Gould)) in Japan in 2019 and 2020 is caused by an unidentified infectious agent

PeerJ ◽

10.7717/peerj.12180 ◽

2021 ◽

Vol 9 ◽

pp. e12180

Author(s):

Tomomasa Matsuyama ◽

Satoshi Miwa ◽

Tohru Mekata ◽

Yuta Matsuura ◽

Tomokazu Takano ◽

...

Keyword(s):

Infectious Agent ◽

Serial Passage ◽

Pearl Oyster ◽

Mass Mortality ◽

Pinctada Fucata ◽

Enveloped Virus ◽

Pearl Oysters ◽

Adult Oyster ◽

Sources Of Infection ◽

Pathogen Occurrence

Mass mortality of 0-year-old pearl oysters, Pinctada fucata (Gould), and anomalies in adults were observed in Japan’s major pearl farming areas in the summer of 2019 and 2020. Although adult oyster mortality was low, both adult and juvenile oysters underwent atrophy of the soft body, detachment of the mantle from nacre (the shiny inner surface of the valves), deposition of brownish material on the nacre, and loss of nacre luster. Infection trials were conducted to verify the involvement of pathogens in this phenomenon. Healthy adult pearl oysters were obtained from areas where this disease had not occurred to use as the recipients. The sources of infection were either affected adult oysters with atrophied soft bodies or batches of juveniles in which mortality had reached conspicuous levels. Transmission of the disease to the healthy oysters were tested either by cohabitation with affected oysters or by injections of the hemolymph of affected animals. The injection infection test examined the effects of filtration and chloroform exposure on the pathogen. Occurrence of the disease was confirmed by the appearance of brown deposits on the nacre and loss of nacre luster. The abnormalities of nacre were clearly reproduced in recipient shells in three out of four cohabitation trials with affected oysters. The disease was also reproduced in six out of six injection trails either with hemolymph filtered through 100 nm filter or with hemolymph treated with chloroform. In a serial passage with hemolymph injections, the disease was successfully transmitted through eight passages. These results suggest that the etiology of the disease is a non-enveloped virus with a diameter ≤100 nm.

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