نتایج جستجو برای: postlarvae age pl12 and stocking density 37
تعداد نتایج: 16939133 فیلتر نتایج به سال:
In less intensive shrimp culture systems, polychaetes are known to be a major food item of several penaeid species. Under these conditions, very little is known about their population dynamics and the possible interactions with penaeid predation and artificial feeding. This work examined the effects of Penaeus subtilis, predation, stocking density and supplemental feeding on the population dyna...
Many workers have examined the processes influencing the recruitment of temperate marine invertebrates but comparatively little is kno'ivn about their tropical counterparts. Brachyuran crustaceans are important constituents of coral reefs, yet remain largely under-studied To examine the temporal patterns of tropical brachyuran larval abundances and postlarval settlement, we deployed 3 replicate...
The present study aimed to assess the potential substitution of Artemia franciscana nauplii with Moina minuta neonates as initial feed for angelfish (Pterophyllum scalare) and severum (Heros severus), evaluating fish growth performance, live food cost, intestinal histomorphometry. To achieve this goal, two separate experiments were carried out each species during 20 days, using 200 postlarvae. ...
The zebrafish (Danio rerio) has become a well-established experimental model in many research fields but the loss of the primary sex-determining region during the process of domestication renders laboratory strains of zebrafish susceptible to the effects of environmental factors on sex ratios. Further, an essential husbandry aspect - the optimal rearing density to avoid stress-induced masculini...
the study reflected in this thesis aims at finding out relationships between critical thinking (ct), and the reading sections of tofel and ielts tests. the study tries to find any relationships between the ct ability of students and their performance on reading tests of tofel and academic ielts. however, no research has ever been conducted to investigate the relationship between ct and the read...
abstract the current study set out to address the issue as to whether the implementation of portfolio assessment would give rise to iranian pre-intermediate efl learner autonomy. participants comprised 60 female in pre-intermediate level within the age range of 16-28.they were selected from among 90 language learners based on their scores on language proficiency test -key english test. then, t...
Work under this investigation included farm survey, extension, and research components using both the CLSU research station and demonstration farms. An experiment was conducted for the determination of optimal stocking sizes, considering the growth and survival performance of various sizes of fingerlings along with economic factors. Size #22 sex-reversed nursery phase fingerlings of Nile tilapi...
As an integral part of the Coalition for Sustainable Egg Supply (CSES) Project, this study simultaneously monitored air emissions of 3 commercially operated egg production systems at the house level and associated manure storage over 2 single-cycle flocks (18 to 78 wk of age). The 3 housing systems were 1) a conventional cage house (CC) with a 200,000-hen capacity (6 hens in a cage at a stockin...
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