scholarly journals Combined Effects of Temperature and Salinity on Hatching and Larval Survival of Commercially Important Tropical Sea urchin, Tripneustes gratilla (Linnaeus, 1758)

2020 ◽  
pp. 1-13
Author(s):  
Md. Shamim Parvez ◽  
M. Aminur Rahman ◽  
Md. Jahidul Hasan ◽  
Md. Habibur Rahman ◽  
Nawshin Farjana ◽  
...  
Keyword(s):  
Sea Urchin ◽  
Captive Breeding ◽  
Activity Index ◽  
Larval Survival ◽  
Interactive Effects ◽  
Salinity Range ◽  
Combined Effects ◽  
Tripneustes Gratilla ◽  
Commercial Species ◽  
Effects Of Temperature

The combined effects of temperature and salinity on percent hatching, normal larval rate at hatching, and survival of fasting larvae after hatching (survival activity index; SAI) of the commercial species of collector sea urchin, Tripneustes gratilla were investigated in a captive laboratory condition. The study was conducted by setting different levels of temperatures (24°C to 36°C) and salinities (38‰ to 23‰). Within the range of temperature from 24 to 36°C and at 32‰ salinity, hatching and normal larval rates, and SAI values were highest at 24 and 27°C. The highest hatching and normal larval rates were found at 35 and 38‰ within the salinity range of 23-38‰; however, SAI value was the highest at 26‰. The results of the experiments in each level of temperature (24, 27 and 30°C) with each salinity (32, 35 and 38‰) indicated interactive effects of temperature and salinity, and within the experimental protocols of 24°C at 38‰ gave an optimal combination for highest hatching and survival of T. gratilla. The findings obtained from the present research would not only be immensely helpful towards the understanding of the suitable temperature-salinity interactions but also facilitate the development of captive breeding, larval raising and mass seed production of this high-valued sea urchin for commercial aquaculture.

Effects of temperature on hatching rate, embryonic development and early larval survival of the edible sea urchin, Tripneustes gratilla

Biologia ◽  
2009 ◽  
Vol 64 (4) ◽  
Author(s):  
Saifur Rahman ◽  
Makoto Tsuchiya ◽  
Tsuyoshi Uehara
Keyword(s):  
Embryonic Development ◽  
Sea Urchin ◽  
Water Environment ◽  
Life History Strategy ◽  
Open Water ◽  
Larval Survival ◽  
Temperature Tolerance ◽  
Hatching Rate ◽  
Tripneustes Gratilla ◽  
Higher Temperature

AbstractThe temperature tolerances of embryonic and early larval development stages of Tripneustes gratilla were investigated from 13-34°C under laboratory conditions. Zygotes showed unequal cleavage at 13°C, whereas cleavage did not occurred at 34°C. Hatching was observed between 16–31°C with maximum hatching rates observed at 22–29°C. The lower and higher temperature limits for embryonic development were approximately 22°C and 29°C, respectively. Outside of this temperature range, embryos showed abnormality at different incubation times. Early larvae of this species have the ability to survive the higher temperature limit for short periods of time. Prism and 2 arm pluteus larvae survived at temperatures between 30 and 33°C, whereas 4 arm pluteus larvae survived at temperatures between 30 and 36°C for 2 h. These results suggest that the larval temperature tolerance capability of T. gratilla is stage dependent. These findings are important for understanding the life history strategy of this sea urchin in the shallow open water environment.

Single and combined effects of temperature and red:far-red light ratio on evening primrose (Oenothera biennis)

Botany ◽  
2015 ◽  
Vol 93 (8) ◽  
pp. 475-483 ◽  
Author(s):  
Mirwais M. Qaderi ◽  
Victoria J. Godin ◽  
David M. Reid
Keyword(s):  
Light Quality ◽  
Plant Biomass ◽  
Red Light ◽  
Interactive Effects ◽  
Total Biomass ◽  
Combined Effects ◽  
Stem Height ◽  
Oenothera Biennis ◽  
Evening Primrose ◽  
Effects Of Temperature

Few studies have considered the interactive effects of temperature and red:far-red light ratio (R:FR) on plants. We studied the effects of these two factors on evening primrose (Oenothera biennis L.). Plants were grown under two temperature regimes (22 °C day – 18 °C night and 28 °C day – 24 °C night) and two R:FR light ratios (low, simulated shade FR enrichment and normal, simulated natural sunlight) in controlled-environment chambers and their growth and physiological characteristics were measured. Among the 23 parameters, 20 were affected by temperature, 21 were affected by light quality, and 16 were affected by their interactions. Higher temperatures increased stem height, photosynthetic pigments, and ethylene, but decreased gas exchange and, in turn, plant biomass. Low R:FR increased stem height, transpiration, stomatal conductance, and ethylene, but decreased photosynthetic pigments, water-use efficiency, and photosynthesis and, in turn, plant biomass. Distinct parallel patterns were found for the combined effects of temperature and light quality. Plants had 2.3 times lower total biomass under lower temperatures at low R:FR than under the same temperatures at normal R:FR. However, plants had 2.8 times lower total biomass under higher temperatures at low R:FR than under the same temperatures at normal R:FR. We conclude that the interactive effects of temperature and R:FR are different than that of the single factors on the natural populations of O. biennis.

scholarly journals Influence of temperature variation on embryonic and early larval development of a commercially important tropical sea urchin Tripneustes gratilla (Linnaeus, 1758)

2018 ◽  
Vol 65 ◽  
Author(s):  
Md. Shamim Parvez ◽  
M. Aminur Rahman ◽  
Fatimah Md. Yusoff ◽  
Aziz Arshad ◽  
Sang-Go Lee
Keyword(s):  
Larval Development ◽  
Sea Urchin ◽  
Captive Breeding ◽  
Developmental Time ◽  
Larval Stages ◽  
Tripneustes Gratilla ◽  
Temperature Levels ◽  
Time Required ◽  
Tropical Sea ◽  
Early Larval Development

<p>The present study investigated the influence of different temperature levels (16, 19, 22, 25, 28, 31 and 34oC) on embryonic and early larval development of the tropical sea urchin, <em>Tripneustes gratilla</em> (Linnaeus, 1758) in a controlled laboratory condition. The critical lower and higher temperature for embryonic development was found to be 16 and 34oC, respectively. Embryos reared in these temperatures exhibited 100% abnormality within 48 h post-insemination. The time required to reach embryonic and larval stages was increased with temperature from 28oC followed by 31, 25, 22 and 19oC. The developmental time of 2-cell to 4-arm pluteus larvae showed significant (p&lt;0.05) differences. The survival (%) of larvae at the prism, 2-arm and 4-arm stages were observed as dissimilar from 22 to 34oC, and the highest values (100% or near 100%) were found at 25 and 28oC. The morphometric measurements from prism to 4-arm pluteus larvae at different temperatures differed significantly (p&lt;0.05). However among the temperatures evaluated, 28oC was found as the best temperature for better growth and development of larvae at all stages. The findings of the study would help to develop captive breeding and seed production programmes for commercial aquaculture of the species.</p>

Interactive effects of temperature and redox on soil carbon and iron cycling

2021 ◽  
Vol 157 ◽  
pp. 108235
Author(s):  
Nikhil R. Chari ◽  
Yang Lin ◽  
Yuan S. Lin ◽  
Whendee L. Silver
Keyword(s):  
Soil Carbon ◽  
Interactive Effects ◽  
Iron Cycling ◽  
Effects Of Temperature

scholarly journals Combined Effects of Temperature and Toxic Algal Abundance on Paralytic Shellfish Toxic Accumulation, Tissue Distribution and Elimination Dynamics in Mussels Mytilus coruscus

Toxins ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 425
Author(s):  
Yunyu Tang ◽  
Haiyan Zhang ◽  
Yu Wang ◽  
Chengqi Fan ◽  
Xiaosheng Shen
Keyword(s):  
Tissue Distribution ◽  
Combined Effects ◽  
Mytilus Coruscus ◽  
Paralytic Shellfish Toxins ◽  
Rapid Elimination ◽  
Simulated Environment ◽  
Paralytic Shellfish ◽  
Algal Abundance ◽  
Effects Of Temperature ◽  
The Impact

This study assessed the impact of increasing seawater surface temperature (SST) and toxic algal abundance (TAA) on the accumulation, tissue distribution and elimination dynamics of paralytic shellfish toxins (PSTs) in mussels. Mytilus coruscus were fed with the PSTs-producing dinoflagellate A. catenella under four simulated environment conditions. The maximum PSTs concentration was determined to be 3548 µg STX eq.kg−1, which was four times higher than the EU regulatory limit. The increasing SST caused a significant decline in PSTs levels in mussels with rapid elimination rates, whereas high TAA increased the PSTs concentration. As a result, the PSTs toxicity levels decreased under the combined condition. Additionally, toxin burdens were assessed within shellfish tissues, with the highest levels quantified in the hepatopancreas. It is noteworthy that the toxin burden shifted towards the mantle from gill, muscle and gonad at the 17th day. Moreover, variability of PSTs was measured, and was associated with changes in each environmental factor. Hence, this study primarily illustrates the combined effects of SST and TAA on PSTs toxicity, showing that increasing environmental temperature is of benefit to lower PSTs toxicity with rapid elimination rates.

Interactive effects of family and stocking density on survival and growth of the sea urchin Strongylocentrotus intermedius

2019 ◽  
Vol 50 (5) ◽  
pp. 969-982
Author(s):  
Weijie Zhang ◽  
Xiaohui Chen ◽  
Huijie Jiang ◽  
Zhong Wang ◽  
Baofeng Wang ◽  
...  
Keyword(s):  
Sea Urchin ◽  
Stocking Density ◽  
Interactive Effects ◽  
Strongylocentrotus Intermedius ◽  
Survival And Growth
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