Effects of selected mixed-algal diets on growth and survival of early postset juveniles of the Pacific geoduck clam,Panopea generosa(Gould, 1850)

2014 ◽  
Vol 21 (2) ◽  
pp. 152-161 ◽  
Author(s):  
Y. Ren ◽  
W. Liu ◽  
C.M. Pearce ◽  
I. Forster ◽  
R.S. McKinley
Keyword(s):  
Growth And Survival ◽  
The Pacific ◽  
Algal Diets

scholarly journals Effects of temperature and salinity on growth and survival of the Pacific red snapper Lutjanus peru (Pisces:Lutjanidae) juvenile

2013 ◽  
Vol 41 (5) ◽  
pp. 1013-1018 ◽  
Author(s):  
Sergio Castillo Vargas Machuca ◽  
Jesus T. Ponce Palafox ◽  
Geronimo Rodriguez Chavez ◽  
Jose Luis Arredondo Figueroa ◽  
Ernesto Chavez Ortiz ◽  
...  
Keyword(s):  
Red Snapper ◽  
Growth And Survival ◽  
The Pacific ◽  
Effects Of Temperature

scholarly journals Effect of Red tilapia (Oreochromis mossambicus × Oreochromis niloticus) on growth and survival of the pacific shrimp (Litopenaeus vannamei) in simultaneous polyculture under marine conditions//Efecto de la tilapia roja (Oreochromis mossambicus × Oreochromis niloticus) en el crecimiento y supervivencia del camarón (Litopenaeus vannamei) en policultivo simultáneo bajo condiciones marinas

Biotecnia ◽  
2020 ◽  
Vol 22 (2) ◽  
pp. 5-12
Author(s):  
Alejandro Mcdonal-Vera ◽  
Wilfrido M. Contreras-Sánchez ◽  
Neil J. Duncan ◽  
Kevin Fitzsimmons ◽  
Maria J. Contreras- García ◽  
...  
Keyword(s):  
Litopenaeus Vannamei ◽  
Oreochromis Niloticus ◽  
Oreochromis Mossambicus ◽  
Pacific White Shrimp ◽  
White Shrimp ◽  
Average Weight ◽  
Growth And Survival ◽  
Red Tilapia ◽  
The Pacific ◽  
The Mean

In the present investigation, we evaluated if the presence of tilapia affects growth and survival of shrimp during pre-growth and grow-out phases. In both experiments, we used a random-blocks design in a single earth pond (0.75 ha) that was prepared and divided into nine (7 x 30 m) enclosures that were considered to be three blocks of three enclosures each. Each randomly stocked block consisted on Pacific white shrimp Litopenaeus vannamei (30 shrimp/m2) and three different densities (0.0, 0.25 and 0.50 fish/m2) of red tilapia hybrids (Oreochromis mossambicus x Oreochromis niloticus) to give three different treatments with three replicates. The results from the pre-growth and grow-out experiments followed the same trend. In both cases, we found no significant statistical differences (P>0.05) in the final average weight of the shrimp. However, the experimental blocks had a significant (P<0.05) effect on the mean sample weight of shrimp. Shrimp in blocks B and C were significantly bigger than shrimp from block A (P<0.05). For both experiments, we found no effect of the presence of tilapias on survival or growth of shrimp.RESUMENEvaluamos si la presencia de tilapias libres afecta el crecimiento y la supervivencia de camarones en fase de preengorda y engorda. Para ambos experimentos, utilizamos un diseño de bloques al azar en un estanque rústico (0.75 ha) que fue preparado y dividido en nueve encierros (7 x 30 m), se formaron tres bloques con tres encierros cada uno. Cada encierro dentro de cada bloque fue aleatoriamente seleccionado para sembrar camarón blanco del Pacífico, Litopenaeus vannamei (30 camarones/m2) y tres diferentes densidades (0.0, 0.25 y 0.50 peces/m2) de híbrido de tilapia roja (Oreochromis mossambicus x Oreochromis niloticus) para formar tres tratamientos con tres réplicas. Los resultados del experimento de pre-engorda y engorda siguieron la misma tendencia. En ambos experimentos no encontramos diferencias estadísticamente en el crecimiento de los camarones ni en las tilapias. Sin embargo, los bloques experimentales presentaron diferencias significativas (P<0.05) en el peso promedio final. Los camarones de los bloques B y C fueron estadísticamente más grandes (P<0.05) que los del bloque A. Para las dos etapas de crecimiento de los camarones, no se observó un efecto de la presencia de tilapias sobre la sobrevivencia o crecimiento de los camarones.

scholarly journals The isotopic differences and implications for Pacific razor clams along the Washington coast

2019 ◽  
Vol 98 ◽  
pp. 12005
Author(s):  
Yongwen Gao ◽  
Joseph Gilbertson ◽  
Hongyan Zhang
Keyword(s):  
Stable Isotope ◽  
Isotope Analysis ◽  
Survival Rates ◽  
Washington State ◽  
Growth And Survival ◽  
Razor Clam ◽  
The Pacific ◽  
Indian Tribes ◽  
Razor Clams ◽  
Biological Differences

The Pacific razor clam fishery in Washington State has been co-managed by the coastal Indian Tribes and the state, but little is known about the growth and population structure of the clams due to difficulties of tagging and monitoring. Here we report the results of a pilot study using stable isotope ratios (δ13C and δ18O) of razor clam shells collected in two groups (juvenile vs. adult) and from two sites (Kalaloch Beach and Roosevelt Beach) where distinct biological differences in clam growth and survival rates were observed. The δ13C values of razor clam shells ranged from -2.9 to -0.3‰, whereas δ18O values of the same samples ranged from -2.2 to +1.4‰. Between the two sites there were significant differences in δ13C values especially for juvenile clams. The δ18O profiles from two representative shells demonstrated similar patterns of rapid growth as juveniles and seasonal patterns throughout the life span. Profiles of δ13C were sinusoidal but did not show seasonality and signatures of ocean acidification. We concluded that stable isotope analysis of razor clam shells is a potential new tool in shellfish research and management.

scholarly journals Effects of mistletoe ( Phoradendron villosum ) on California oaks

2018 ◽  
Vol 14 (6) ◽  
pp. 20180240 ◽  
Author(s):  
Walter D. Koenig ◽  
Johannes M. H. Knops ◽  
William J. Carmen ◽  
Mario B. Pesendorfer ◽  
Janis L. Dickinson
Keyword(s):  
Ecosystem Services ◽  
Radial Growth ◽  
Positive Relationship ◽  
Negative Consequences ◽  
Acorn Production ◽  
Growth And Survival ◽  
Significant Positive Relationship ◽  
The Pacific

Mistletoes are a widespread group of plants often considered to be hemiparasitic, having detrimental effects on growth and survival of their hosts. We studied the effects of the Pacific mistletoe, Phoradendron villosum , a member of a largely autotrophic genus, on three species of deciduous California oaks. We found no effects of mistletoe presence on radial growth or survivorship and detected a significant positive relationship between mistletoe and acorn production. This latter result is potentially explained by the tendency of P. villosum to be present on larger trees growing in nitrogen-rich soils or, alternatively, by a preference for healthy, acorn-producing trees by birds that potentially disperse mistletoe. Our results indicate that the negative consequences of Phoradendron presence on their hosts are negligible—this species resembles an epiphyte more than a parasite—and outweighed by the important ecosystem services mistletoe provides.

Financing small and medium enterprises in Asia and the Pacific

2015 ◽  
Vol 4 (1) ◽  
pp. 2-32 ◽  
Author(s):  
Masato Abe ◽  
Michael Troilo ◽  
Orgil Batsaikhan
Keyword(s):  
Economic Growth ◽  
South Asia ◽  
World Bank ◽  
Small And Medium Enterprises ◽  
Asia Pacific ◽  
Content Type ◽  
Growth And Survival ◽  
The Pacific ◽  
Severe Constraint ◽  
Medium Enterprises

Purpose – The purpose of this paper is to propose policy suggestions for the financing of small and medium enterprises (SMEs) in the Asia-Pacific region. Recent literature suggests that lack of capital is the most severe constraint for SME survival and growth. Enabling policymakers to assist SMEs in their search for financing will boost economic growth. Design/methodology/approach – The methodology includes both quantitative and qualitative components. Current World Bank data on the strength of various financial institutions in the countries of interest is analyzed to discover areas of improvement. Additionally, 32 experts from East and South Asia were interviewed several times to determine areas of concern in financing SMEs. Their responses and the evidence from the World Bank data form the basis of the policy prescriptions in the paper. Findings – Financing is a critical constraint for SMEs for several reasons. Many SME owners do not manage working capital effectively, information asymmetry between banks and SMEs retards the loan application and approval process, and underdeveloped equity markets deny SMEs future growth opportunities. Policymakers can ameliorate conditions by serving as facilitators and communicators; governments should not provide financing directly if possible. Practical implications – It is hoped and expected that the policy prescriptions offered herein will enhance the growth and survival prospects of SMES, thereby creating more employment, innovation, and economic growth. Originality/value – The main contribution of this work is its scope. While the financing of SMEs is a familiar topic, the review of issues and policies in East and South Asia, and their distillation into practical advice for officialdom, is what makes this manuscript unique.

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