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The Contribution of Mangrove Leaf Litter to Juvenile Shrimp (Penaeus Monodon) Production in Mangrove-Shrimp Aquaculture Systems.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	The Contribution of Mangrove Leaf Litter to Juvenile Shrimp (Penaeus Monodon) Production in Mangrove-Shrimp Aquaculture Systems./
作者:	Alam, M.d. Iftakharul.
面頁冊數:	1 online resource (172 pages)
附註:	Source: Dissertations Abstracts International, Volume: 84-05, Section: B.
Contained By:	Dissertations Abstracts International84-05B.
標題:	Water quality. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29877803click for full text (PQDT)
ISBN:	9798352981573

The Contribution of Mangrove Leaf Litter to Juvenile Shrimp (Penaeus Monodon) Production in Mangrove-Shrimp Aquaculture Systems.
Alam, M.d. Iftakharul.

The Contribution of Mangrove Leaf Litter to Juvenile Shrimp (Penaeus Monodon) Production in Mangrove-Shrimp Aquaculture Systems. - 1 online resource (172 pages)

Source: Dissertations Abstracts International, Volume: 84-05, Section: B.

Thesis (Ph.D.)--Wageningen University and Research, 2022.

Includes bibliographical references

Intensification of shrimp farming has been identified as one of the main causes for mangrove destruction in the coastal region of many countries. The idea to develop mangrove-shrimp co-management was developed during the last decades of the 20th century as an effort to help restore the mangrove ecosystem and make shrimp culture sustainable. The present research is part of a broader effort to introduce silvoaquaculture, combining mangrove and shrimp, to Bangladesh. Mangrove- shrimp comanagement has very high potential from an ecological and economical point of view. Mangrove leaf litter are shown to enhance shrimp production by enhancing natural food production. In addition, the nutrient use efficiency of artificial feed is found to be enhanced by providing leaf litter as extra nutrient source, a form of synergism between natural and artificial feed. Therefore the main aim of this thesis is to assess the impact of leaf litter from different mangrove species on pond performance, water quality and natural food availability in mangrove shrimp nursery tanks and ponds.First, the nutrient and anti-nutrient content in leaf litter of selected mangrove species and their effect on shrimp performance were determined (Chapter 2). The observed effects on post-larval shrimp differed between mangrove species, showing a clear ranking of mangrove species in terms of their ability to enhance shrimp growth. Leaf litter from different mangrove species, not only led to different concentrations of plankton in the PL nursery tank system, but also correlated with shrimp growth performance.Chapter 3 explored possible effects of interactions between leaf litter from the four chosen mangrove species and pelleted feed on shrimp growth and survival in shrimp PL nursery tanks. Leaf litter and feed combined, resulted in a 21 to 33% higher weight gain of shrimp PL than based on the additive contributions of only leaf litter or only feed, indicating a synergistic effect of the two food sources on shrimp growth. Among the different mangrove species tested, S. apetala (Sa; 23.1%) contributed the most to total weight gain followed by A. officinalis (Ao; 21.6%), S. caseolaris (Sc; 21.6%) and H.fomes (Hf; 10%). The lower feed conversion ratio (FCR) (0.18-0.27) in the treatments combining leaf litter and supplemental feed as compared to the feed-only treatment (0.41) indicated that leaf litter (directly or indirectly by stimulating natural food production) contributed to the nutrition of the shrimp. The observed synergistic effect between supplemental feed and leaf litter is an opportunity for farmers to reduce shrimp production costs and simultaneously raise benefits.Chapter 4 explored the effect of different combinations of leaf litter from different mangrove species on shrimp larval performance in tanks and small (mesocosm) ponds. Three 3-mangrove-species and one 4-mangrove-species combinations of mangrove leaf litter were tested. Under controlled conditions in tanks, mixed leaf litter and feed resulted in 22 to 32% higher weight gain of PL than based on the additive contributions of only leaf litter or only feed, indicating a similar synergistic effect of the two food sources on shrimp growth as observed in Chapter 3 Although the nutrient input level and PL stocking density in ponds were less than half the input or density in tanks, the shrimp grew 3.5 times larger in the mesocosm ponds. The different combinations of mangrove leaf litter employed influenced water quality and stimulated the production of phytoplankton and zooplankton food, which allowed greater shrimp weight gain.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9798352981573Subjects--Topical Terms:

556913
Water quality.
Index Terms--Genre/Form:

542853
Electronic books.

The Contribution of Mangrove Leaf Litter to Juvenile Shrimp (Penaeus Monodon) Production in Mangrove-Shrimp Aquaculture Systems.
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