Food concentration and stocking density effects on survival and growth of laboratory-reared larvae of bay anchovy Anchoa mitchilli and lined sole Achirus lineatus

1977 ◽  
Vol 43 (4) ◽  
pp. 333-341 ◽  
Author(s):  
E. D. Houde
Keyword(s):  
Stocking Density ◽  
Food Concentration ◽  
Anchoa Mitchilli ◽  
Density Effects ◽  
Survival And Growth ◽  
Bay Anchovy

Spatial ecology and growth in early life stages of bay anchovy Anchoa mitchilli in Chesapeake Bay (USA)

2020 ◽  
Vol 651 ◽  
pp. 125-143
Author(s):  
TD Auth ◽  
T Arula ◽  
ED Houde ◽  
RJ Woodland
Keyword(s):  
Chesapeake Bay ◽  
Spatial Ecology ◽  
Environmental Variability ◽  
Larval Growth ◽  
Larval Abundance ◽  
Spatial And Temporal Variability ◽  
Estuarine Ecosystem ◽  
Anchoa Mitchilli ◽  
Larval Production ◽  
Bay Anchovy

The bay anchovy Anchoa mitchilli is the most abundant fish in Chesapeake Bay (USA) and is a vital link between plankton and piscivores within the trophic structure of this large estuarine ecosystem. Baywide distributions and abundances of bay anchovy eggs and larvae, and larval growth, were analyzed in a 5 yr program to evaluate temporal and spatial variability based on research surveys in the 1995-1999 spawning seasons. Effects of environmental variability and abundance of zooplankton that serve as prey for larval bay anchovy were analyzed. In the years of these surveys, 97.6% of eggs and 98.8% of larvae occurred in the polyhaline lower bay. Median egg and larval abundances differed more than 10-fold for surveys conducted in the 5 yr and were highest in the lower bay. Within years, median larval abundance (ind. m-2) in the lower bay was generally 1-2 orders of magnitude higher than upper-bay abundance. Salinity, temperature, and dissolved oxygen explained 12% of the spatial and temporal variability in egg abundances and accounted for 27% of the variability in larval abundances. The mean, baywide growth rate for larvae over the 5 yr period was 0.75 ± 0.01 mm d-1, and was best explained by zooplankton concentration and feeding incidence. Among years, mean growth rates ranged from 0.68 (in 1999) to 0.81 (in 1998) mm d-1 and were fastest in the upper bay. We identified environmental factors, especially salinity, that contributed to broadscale variability in egg and larval production.

The Influence of Stocking Density On Survival and Growth of Buenos Aires Tetra (Hemigrammus Caudovittatus) Larvae Reared Under Controlled Conditions

2008 ◽  
Vol 23 (4) ◽  
pp. 881-887 ◽  
Author(s):  
Krzysztof Kupren ◽  
Dariusz Kucharczyk ◽  
Maja Prusińska ◽  
Sławomir Krejszeff ◽  
Katarzyna Targońska ◽  
...  
Keyword(s):  
Buenos Aires ◽  
Stocking Density ◽  
Controlled Conditions ◽  
Survival And Growth

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

Reflecting materials in the eyes of three teleosts, Orthopristes chrysopterus, Dorosoma cepedianum and Anchoa mitchilli

1973 ◽  
Vol 184 (1074) ◽  
pp. 15-27 ◽  
Keyword(s):  
Body Length ◽  
Pigment Epithelium ◽  
Total Body Length ◽  
Gizzard Shad ◽  
Dorosoma Cepedianum ◽  
Anchoa Mitchilli ◽  
First Report ◽  
Total Body ◽  
Bay Anchovy

The tapeta lucida of three species of teleosts were examined to determine the composition of the reflecting material. The fishes were bay anchovy Anchoa mitchilli (Engraulidae), gizzard shad Dorosoma cepedianum (Clupeidae) and pigfish Orthopristes chrysopterus (Haemulidae). The tapetum of each species was situated in the pigment epithelium of the eye. That of the pigfish contained triglycerides identified as chiefly glyceryl tridocosahexaenoate. A reduced pteridine, 7, 8-dihydroxanthopterin, occurred in the tapetum of the gizzard shad. Guanine occurred in the tapetum of the bay anchovy. The tapetum of the shad contained brightly reflecting particles about 0.5 μm in diameter There were 10.8 mg of dihydroxanthopterin in the tapetum of a shad (total body length 23 cm) and 0.46 mg of guanine in the tapetum of an anchovy (total body length 9 cm). This is the first report of a pteridine acting as a retinal reflector in vertebrates. Various aspects of retinal reflectors of teleosts are discussed and their variety and common characteristics commented upon.

Winter Survival and Growth of Chondrus crispus in Onshore Culture Tanks

1986 ◽  
Vol 43 (2) ◽  
pp. 263-268 ◽  
Author(s):  
Peter F. Shacklock ◽  
James S. Craigie
Keyword(s):  
Environmental Conditions ◽  
Stocking Density ◽  
Ice Cover ◽  
Winter Survival ◽  
Chondrus Crispus ◽  
Eastern Canada ◽  
Net Production ◽  
Survival And Growth ◽  
Reliable Methods ◽  
Natural Irradiance

Commercial aquaculture of Chondrus crispus in eastern Canada required the development of reliable methods for ensuring the winter survival of a healthy, vegetative inoculum. Two procedures were investigated. Agitated cultures of C. crispus (stocking density <6 kg∙m−2) in running seawater grew at average rates of 0.21–0.34 kg∙m−2∙wk−1 during two winters under natural irradiance. Cultures maintained in undisturbed, outdoor tanks of seawater over three winters showed little or no net production; however, survival was excellent provided that the stocking density remained below approximately 10 kg∙m−2. The plants were capable of resuming growth when environmental conditions improved. We found no difference in the responses of the several haploid and diploid isolates examined. Large vegetative inocula required for commercial aquaculture can be maintained simply and reliably in tanks of clean seawater if they are undisturbed and an ice cover is allowed to form.

scholarly journals Research Note: Stocking density effects on production qualities of broilers raised without the use of antibiotics

2020 ◽  
Vol 99 (2) ◽  
pp. 698-701 ◽  
Author(s):  
Amanda McKeith ◽  
Meghan Loper ◽  
Katy J. Tarrant
Keyword(s):  
Stocking Density ◽  
Research Note ◽  
Density Effects

scholarly journals Prepartum stocking density: Effects on metabolic, health, reproductive, and productive responses

2014 ◽  
Vol 97 (9) ◽  
pp. 5521-5532 ◽  
Author(s):  
P.R.B. Silva ◽  
A.R. Dresch ◽  
K.S. Machado ◽  
J.G.N. Moraes ◽  
K. Lobeck-Luchterhand ◽  
...  
Keyword(s):  
Stocking Density ◽  
Metabolic Health ◽  
Density Effects
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