Hatching of artemia franciscana and it’s performance in fertilized ponds

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dc.contributor.authorJacob, Augustino Tegemea
dc.date.accessioned2024-07-24T10:21:18Z
dc.date.available2024-07-24T10:21:18Z
dc.date.issued2024-05
dc.descriptionMSc Dissertation
dc.description.abstractThis study was conducted to assess the general performance of Artemia franciscana from saltworks in Tanga, Tanzania. The study aimed to determine Artemia cysts’ biometry and hatching efficiency, and effect of pond fertilization on growth performance and nutritional composition of Artemia. For the study on biometry and hatching efficiency, Artemia cysts were collected from salt farms in Tanga, Tanzania, using a 100-150 mesh net. Then the cysts were processed and packed in airtight containers. In the laboratory, the diameter of each cyst was measured from a sub sample of 200 cysts and another sub-samples were incubated in beakers at 28 °C, 35 ppt, and a pH of 8. After 24 hours, newly hatched nauplii were moved in triplicate to the culturing tanks, where they were cultured for 15 days while being fed microalgae (Nannochloropsis oculate). As a reference, the Vinh Chau Artemia cyst strain (from Vietnam) was used as control. The findings showed that Artemia cyst from Tanga had a higher value of capsulated cyst diameter (213.4μm) and chorion thickness (9.7μm) compared to Vinh Chau Artemia cysts (208.3 μm; 8.3 μm) respectively. Also, a higher hatching percentage and efficiency was observed in Vinh Chau Artemia cyst compared to Tanga (p < 0.05). However a higher growth performance and survival percentage (74.56%) were observed in Tanga Artemia strain compared to Vinh Chau Artemia strain (53.85%) which is very promising. Hence, Tanga Artemia strain showed good quality hence its prospects to production in pond. However, the study on the effects of pond fertilization, examined the growth performance and nutritional composition of Artemia. At 28 °C, 35 ppt, and a pH of 8, six buckets each holding 20 liters of water were used to hatch a total of 30g cysts. The newly hatched nauplii were then inoculated in triplicates into the fertilized and non-fertilized ponds, where they were cultured for 28 days at a density of 100 nauplii/litre. The results on Artemia’s growth performance and nutritional composition were significantly greater in fertilized ponds (p<0.05). Phytoplankton communities were also more abundant in fertilized ponds compared to non-fertilized ponds. All the environmental parameters monitored were within the recommended range for example the mean salinity was above 70ppt. The findings from this study suggested that pond fertilization is of great importance for quality and optimal production of Artemia in ponds. The results of this study lead to the conclusion that Tanga cysts exhibit good biometric characteristics as well as good growth performance when exposed to pond fertilization. As a result, we recommend further research in order to enhance more traits of the local Artemia breed in pond production.
dc.description.sponsorshipThe Western Indian Ocean Marine Science Association (WIOMSA)
dc.identifier.urihttps://www.suaire.sua.ac.tz/handle/123456789/6321
dc.language.isoen
dc.publisherSokoine University of Agriculture
dc.subjectArtemia
dc.subjectGrowth
dc.subjectSurvival
dc.subjectPlankton
dc.subjectNutritional Composition
dc.subjectCysts
dc.titleHatching of artemia franciscana and it’s performance in fertilized ponds
dc.typeThesis

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