Determination of larval development stages in beluga (Huso huso Linnaeus, 1758)
Journal Title: Agricultural Advances - Year 2014, Vol 3, Issue 1
Abstract
The study of egg andlarvae stages tn fishes is one of new fields in Ichthyology. There are manychanges in larvae stage and the study of fish bio-history can provide someinformation about the changes of this stage to us. In this study, the larvaedevelopment stages on 44 samples of Bluga larvae investigated based on themorphological observations, the pigments scattering pattern and finsdevelopment patterns. From the viewpoint of pigments pattern, the highestpigments were concentrated on the rear of head and between eyes and the lowestwas on fins bud, the tip of snout and under of lateral line of body. Themorphological observations in larvae stage indicated that larvae in early stagehas different shape than its puberty and its appearance will change in pamllelto its development during the time, so that at the end of this stage it is solike an adult fish. In same performed researches on larvae of other sturgeonspecies, there are relative similarity based on pigment scattering pattern butthere are significant differences in morphological observation and also thepattern of fins development.
Authors and Affiliations
N. Norouzi*| M.Sc Student of Fishery Department of Gorgan University., R. Ghorbani| Assistant professor of Fishery Department of Guilan University.
Keywords
Related Articles
- EP ID EP534
- DOI 10.14196/aa.v3i1.1152
- Views 497
- Downloads 26
Site specific nutrient management in citrus
Crop behaviour and soils are not uniform within an orchard which have been the triggering factor for not able to break yield barrier through effective nutrient management programme. Better response of site specific nut...
Prevalence of helminth parasites in Gallus domesticus from Gurez valley
During the study period of two years the prevalence of helminth parasites in domestic fowl from Gurez valley were analysed. A total of 137 domestic fowl were examined for helminth parasites from May 2013 to April 2015....
Evaluation of salt tolerance of tomato (Lycopersicon esculentum)
The response of tomato genotype Chef against five salinity levels (distilled water or control, 25, 50, 75 and 100 mM) were studied at germination and early seedling stages. An experiment with conducted by using a compl...
Nutrient-water interaction in citrus: recent developments
Water along with fertilizer use efficiency and commercial citriculture grow in tandem for global trade and tariff. Optimising water and fertilizer requirement through micro-irrigation and fertigation constitute an impo...
Soil acidification and lime quality: sources of soil acidity, its effects on plant nutrients, efficiency of lime and lim
Agriculture sectors support economy of most developing countries. InSub-Sahara Africa, the agriculture is predominantly based on rain-fedagricultural production of small, semi-subsistence, and increasingly fragmentedfa...