Preliminary results of intraspecific sterlet hybrid (Siberian sterlet × sterlet) rearing under intensive conditions

Due to early maturation and a small size, sterlet (Acipenserrut-henus) is a very advantageous fish for intensive sturgeon farming with regard to caviar production. According to our previous observations, the growth potential of Siberian sterlet (A.ruthenusmarsiglii) is higher than that of the European one. In our experiment, sterlet and an intraspecific hybrid (Siberian sterlet × sterlet) were tested under intensive tank conditions. During the 8 weeks of the experiment, survival, growth and size heterogeneity were investigated. According to the results, there were no significant differences in survival and growth but the size heterogeneity was higher in the hybrid. It is supposed that, in our trial, the applied water temperature range (24.0–25.5 °C) was optimal for sterlet, but was probably above the optimal range for the hybrid.

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Root Growth Potential and Microsite Effects on Conifer Seedling Establishment in Northern Idaho

Forests ◽

10.3390/f12050597 ◽

2021 ◽

Vol 12 (5) ◽

pp. 597

Author(s):

Jacob A. Reely ◽

Andrew S. Nelson

Keyword(s):

Root Growth ◽

Douglas Fir ◽

Seedling Quality ◽

Growth Potential ◽

Larix Occidentalis ◽

Root Growth Potential ◽

Western Larch ◽

Neighborhood Conditions ◽

Seedling Performance ◽

Survival And Growth

Environmental conditions and seedling quality interact to produce complex patterns of seedling survival and growth. Root growth potential (RGP) is one metric of seedling quality that can be rapidly measured prior to planting, but the correlation of RGP and seedling performance is not consistent across studies. Site factors including microsite objects that cast shade and competing vegetation can also influence seedling performance. We examined the effects of RGP, presence/absence of a microsite object, and competition cover on the survival and growth of three native conifers to the Inland Northwest, USA, over 5 years. We found that RGP had no effect on the survival or growth of western larch (Larix occidentalis), Douglas fir (Pseudotsuga menziesii var. glauca), and grand fir (Abies grandis) at a mesic north aspect site and a xeric south aspect site. Comparatively, the presence of a microsite increased the odds of survival by 37% for western larch and 158% for grand fir, while the absence of forb cover increased the odds of survival of western larch by 72% and of grand fir by 26%. Douglas fir was less sensitive to microsites and competition. The strong effects of neighborhood conditions around seedlings help inform silvicultural practices to enhance the establishment of western larch and grand fir, including planting seedlings near shading objects and competition control, while these practices may not be as important for Douglas fir.

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High tolerance of Chaetomorpha sp. to salinity and water temperature enables survival and growth in stagnant waters of central Thailand

International Aquatic Research ◽

10.1007/s40071-014-0092-4 ◽

2015 ◽

Vol 7 (1) ◽

pp. 47-62 ◽

Cited By ~ 9

Author(s):

Isao Tsutsui ◽

Tatsuo Miyoshi ◽

Dusit Aue-umneoy ◽

Jaruwan Songphatkaew ◽

Chonlada Meeanan ◽

...

Keyword(s):

Water Temperature ◽

High Tolerance ◽

Survival And Growth ◽

Central Thailand

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Morphology and ecology of Thalassiosira Cleve (Bacillariophyta) species rarely recorded in Brazilian coastal waters

Brazilian Journal of Biology ◽

10.1590/s1519-69842009000500009 ◽

2009 ◽

Vol 69 (4) ◽

pp. 1059-1071 ◽

Cited By ~ 7

Author(s):

M. Garcia ◽

C. Odebrecht

Keyword(s):

Electron Microscope ◽

Scanning Electron Microscope ◽

Water Temperature ◽

Wide Temperature Range ◽

Coastal Waters ◽

Light Microscope ◽

Temperature Range ◽

The World ◽

First Time ◽

Scanning Electron

The detailed description of rarely recorded Thalassiosira species in Brazil is presented with light microscope (LM) and scanning electron microscope (SEM) illustrations. A total of 78 phytoplankton net samples (20 µm) collected between the years 2000 and 2006 in coastal waters of southern Brazilian, Cassino Beach and the estuary of Lagoa dos Patos, were studied in cleaned material using the Axiovert Zeiss LM and Jeol 6060 SEM. Water temperature and salinity of samples and six species are presented: Thalassiosira endoseriata, T. hendeyi, T. lundiana, T. minuscula, T. oceanica and T. wongii. Two species, Thalassiosira hendeyi and T. endoseriata were the most common being observed in all seasons at Cassino Beach in a wide temperature range (10-26 ºC), while only sporadically in the estuary of Lagoa dos Patos. Thalassiosira endoseriata, T. lundiana, T. oceanica and T. wongii are for the first time reported in Brazilian coastal waters. The latter two species, rarely recorded in the world, are fully illustrated based on Brazilian material.

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Size heterogeneity, growth potential and aggression in juvenile yellowtail kingfish (Seriola lalandi Valenciennes)

Aquaculture Research ◽

10.1111/j.1365-2109.2007.01769.x ◽

2007 ◽

Vol 38 (12) ◽

pp. 1254-1264 ◽

Cited By ~ 21

Author(s):

Damian Moran

Keyword(s):

Growth Potential ◽

Size Heterogeneity ◽

Yellowtail Kingfish ◽

Seriola Lalandi

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An analysis of growth of different cattle genotypes reared in different environments

The Journal of Agricultural Science ◽

10.1017/s0021859600043409 ◽

1984 ◽

Vol 103 (1) ◽

pp. 137-153 ◽

Cited By ~ 48

Author(s):

J. E. Frisch ◽

T. E. Vercoe

Keyword(s):

Growth Rate ◽

Growth Rates ◽

High Growth ◽

Environmental Stresses ◽

Growth Potential ◽

Gastrointestinal Helminths ◽

Treatment Groups ◽

Survival And Growth ◽

Different Levels ◽

High Growth Potential

SummaryCalves from three breeds, Brahman, Hereford × Shorthorn (HS) and Brahman × HS (BX), were divided equally into two groups, one of which was treated every 3 weeks from birth onwards to control ticks and gastrointestinal helminths, and one of which was untreated. Mortalities, growth rates and levels of resistance to environmental stresses that affected both mortality and growth under grazing conditions were recorded for all animals up to weaning (6 months) and for all males up to 15 months of age. The Brahmans were the most and the HS were the least resistant to environmental stresses, each of which was shown to depress growth in proportion to its magnitude and to contribute to the high mortalities of the HS. All breeds responded positively to parasite control with the greatest response in both survival and growth in the HS breed and the least response in the Brahman breed.Samples of males from the various breed-treatment groups were taken into pens where they were protected from environmental stresses and fed both low-quality pasture hay and high-quality lucerne hay ad libitum. Measurements were made of fasting metabolism, maintenance requirement, voluntary food intake and gain, variables related to the growth potential of each animal. The HS animals had the highest whilst the Brahmans had the lowest values for each variable.However, despite their low growth potential, the Brahmans had the highest growtli rate, and the HS, despite their high growth potential, had the lowest growth rate, when growth was measured in the presence of all environmental stresses. When parasites were controlled, growth rates were highest for the BX, the breed with intermediate growtli potential, and did not differ between the HS and Brahmans. These interactions arose because of the different contributions of resistance to environmental stresses and growth potential to growth rate measured at the different levels of environmental stresses. The relevance of these interactions to breed evaluation and cross-breeding is considered.Growth potential and resistance to environmental stresses were negatively correlated both between and within breeds, though the latter was biased by the effects of compensation. The influence of these relationships on the likely outcome of selection for increased growth rate, both between and within breeds, is discussed.

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Induction of maturation and spawning of pink shrimp, Penaeus duorarum, by changing water temperature, and survival and growth of young

Aquaculture ◽

10.1016/0044-8486(94)90314-x ◽

1994 ◽

Vol 128 (3-4) ◽

pp. 255-260 ◽

Cited By ~ 14

Author(s):

Geraldine M. Cripe

Keyword(s):

Water Temperature ◽

Pink Shrimp ◽

Survival And Growth ◽

Penaeus Duorarum

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Outplanting Performance of the Bornean Tropical Indigenous Species Shorea macrophylla (de Vriese) P. S. Ashton in relation to Seedling Age

International Journal of Forestry Research ◽

10.1155/2021/8859205 ◽

2021 ◽

Vol 2021 ◽

pp. 1-12

Author(s):

Mugunthan Perumal ◽

Mohd Effendi Wasli ◽

Soo Ying Ho

Keyword(s):

Growth Performance ◽

Forest Restoration ◽

Survival Rates ◽

Iucn Red List ◽

Growth Potential ◽

Indigenous Species ◽

Nursery Production ◽

Survival And Growth ◽

Outplanting Performance ◽

Tropical Forest Restoration

Planting high-quality seedlings with desirable growth attributes are associated with successful survival and growth performance following outplanting. Considering that most tree species from the Dipterocarpaceae family are on the IUCN Red List of Threatened Species, proper conservation of such species is necessary. Very little is known with no clear consensus regarding whether increasing the seedling production period enhances outplanting survival and growth potential of tropical dipterocarp species planted under enrichment planting in Malaysia. In this study, one potential Bornean tropical indigenous species, Shorea macrophylla (de Vriese) P.S. Ashton, was produced in the Universiti Malaysia Sarawak nursery and outplanted at Sampadi Forest Reserve, Sarawak. Different nursery production periods (3, 6, 9, and 24 months) were tested for the species at the time of planting as well as for the subsequent growth performance after 12, 24, and 42 months of outplanting. The findings revealed that older (9- and 24-month-old) S. macrophylla seedlings were morphologically larger from younger (3- and 6-month-old) seedlings. Nonetheless, the overall pooled mean survival rates declined from 61.7 to 44.6% after 12, 24, and 42 months of outplanting. For the 42-month period, the survival rate for the 9-month-old seedlings was significantly higher than that for the 3-, 6-, and 24-month-old seedlings. Notwithstanding, the relative growth rate of the stem diameter was higher for the 3- and 9-month-old seedlings than for the 6- and 24-month-old seedlings after 42 months of outplanting. Thus, maintaining plant material from the seedlings produced at 3, 6, and 9 months of age would be beneficial for the initiation of transplantation in restoration programmes in Sarawak. The 24-month-old seedlings will also be useful, especially during irregular flowering and unpredictable fruiting intervals. A further experimental study on other environmental factors that could influence the outplanting performance of the seedlings in the tropical forest restoration area of Sarawak, Malaysia, is necessary.

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Root Growth Potential, First-Year Survival, and Growth of Shortleaf Pine Seedlings Show Effects of Life Date, Storage, and Family

Southern Journal of Applied Forestry ◽

10.1093/sjaf/13.4.163 ◽

1989 ◽

Vol 13 (4) ◽

pp. 163-169 ◽

Cited By ~ 3

Author(s):

S. W. Hallgren ◽

C. G. Tauer

Keyword(s):

Root Growth ◽

Seedling Survival ◽

Lateral Roots ◽

Growth Potential ◽

First Year ◽

Pinus Echinata ◽

Shortleaf Pine ◽

Root Growth Potential ◽

Terminal Bud ◽

Survival And Growth

Abstract Root growth potential (RGP), and first-year field survival and growth of shortleaf pine (Pinus echinata Mill.) seedlings were significantly affected by lift date, storage, and family. Seedlings lifted in December and January showed highest RGP, survival, and growth. Storage for 28 daysalways reduced survival and growth, and the effect was greatest for late-lifted seedlings. However, for late planting, the difference in performance between freshly lifted seedlings and earlier lifted and stored seedlings may be small. Large family differences existed for seasonal changesin RGP and survival, suggesting separate management by family may be beneficial. The presence of a terminal bud and secondary needles showed little value in predicting seedling performance, whereas RGP and number of primary lateral roots were strongly correlated with seedling survival. South.J. Appl. For. 13(4):163-169.

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