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Ana Milstein - One of the best experts on this subject based on the ideXlab platform.
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Effects of adding the small fish punti (Puntius sophore Hamilton) and/or Mola (Amblypharyngodon Mola Hamilton) to a polyculture of large carp
Aquaculture Research, 2003Co-Authors: Abdul Wahab, M A Alim, Ana MilsteinAbstract:This experiment was carried out in the framework of a project to develop a viable fish polyculture technology under Bangladeshi conditions that allows simultaneous fish production of small indigenous species for farm families' consumption and of large carp species as a cash crop. The polyculture included the large carp rohu, catla and mirror carp as cash crop fish, and the small indigenous fish punti and Mola as food for the small-scale household. Total large carp stocking density was 10 000 fish ha−1, at a species ratio 1:1:1. Total small fish stocking densities were 0, 25 000 or 50 000 fish ha−1. The objectives were to assess the effects of adding 25 000 punti and/or Mola ha−1 on the large carp and environment, and to assess the effects of punti on Mola and Mola on punti. It was found that catla was not affected by the addition of small fish in any of the combinations tested; rohu was not affected by punti, and Mola reduced rohu performance by 30–40% only when punti was not present; mirror carp was not affected by punti, and Mola increased mirror carp growth rate and harvesting weight by 25–30% whether punti was present or not; small fish did not significantly affect total yield and food conversion ratio; punti performance was not affected by Mola; Mola harvesting weight was not affected by punti, while Mola harvesting numbers and biomass were reduced by 55–65% by punti. Factor analysis of water quality data identified photosynthesis–respiration and algal biomass– temperature as the main processes governing water quality. Effects of treatment on those water quality factors are analysed, and the fish–water quality relationships discussed. In a parallel polyculture experiment in 25 farm ponds, the performance of large carp species was found to be unaffected by the addition of punti and/or Mola. The results indicate that, at the densities tested, punti and Mola addition to the large carp polyculture is viable as they do not reduce cash crop production and might be a good food source for the farmer's family.
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effects of adding the small fish punti puntius sophore hamilton and or Mola amblypharyngodon Mola hamilton to a polyculture of large carp
Aquaculture Research, 2003Co-Authors: M A Wahab, M A Alim, Ana MilsteinAbstract:This experiment was carried out in the framework of a project to develop a viable fish polyculture technology under Bangladeshi conditions that allows simultaneous fish production of small indigenous species for farm families' consumption and of large carp species as a cash crop. The polyculture included the large carp rohu, catla and mirror carp as cash crop fish, and the small indigenous fish punti and Mola as food for the small-scale household. Total large carp stocking density was 10 000 fish ha−1, at a species ratio 1:1:1. Total small fish stocking densities were 0, 25 000 or 50 000 fish ha−1. The objectives were to assess the effects of adding 25 000 punti and/or Mola ha−1 on the large carp and environment, and to assess the effects of punti on Mola and Mola on punti. It was found that catla was not affected by the addition of small fish in any of the combinations tested; rohu was not affected by punti, and Mola reduced rohu performance by 30–40% only when punti was not present; mirror carp was not affected by punti, and Mola increased mirror carp growth rate and harvesting weight by 25–30% whether punti was present or not; small fish did not significantly affect total yield and food conversion ratio; punti performance was not affected by Mola; Mola harvesting weight was not affected by punti, while Mola harvesting numbers and biomass were reduced by 55–65% by punti. Factor analysis of water quality data identified photosynthesis–respiration and algal biomass– temperature as the main processes governing water quality. Effects of treatment on those water quality factors are analysed, and the fish–water quality relationships discussed. In a parallel polyculture experiment in 25 farm ponds, the performance of large carp species was found to be unaffected by the addition of punti and/or Mola. The results indicate that, at the densities tested, punti and Mola addition to the large carp polyculture is viable as they do not reduce cash crop production and might be a good food source for the farmer's family.
Wahab - One of the best experts on this subject based on the ideXlab platform.
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Effects of addition of Mola at different densities on production of giant freshwater prawn
Journal of the Bangladesh Agricultural University, 2012Co-Authors: R. Pervin, Wahab, K. Fatema, M. S. R. KhanAbstract:The effects of Mola (Amblypharyngodon Mola) at different densities in polyculture with freshwater prawn (Macrobrachium rosenbergii) were investigated at the Fisheries Field Laboratory, Bangladesh Agricultural University, Mymensingh. The experiment had three treatments, viz. prawn + 1 Mola m-2, prawn + 1.5 Mola m-2 and prawn + 2 Mola m-2 and were treated as T1, T2, and T3, respectively with three replications in each. Prawn stocking density was same (3 juvenile m-2) in all treatments. Feeds were applied twice daily for prawn. Assuming 80% survival, feeding rates were gradually reduced to 10-5% of body weight from the beginning to the last month. Water quality parameters (except transparency, chlorophyll-a) did not vary significantly (P>0.05). Weight gain, SGR (% body weight), gross and net production of prawn were not significantly different (P>0.05). Higher total production was recorded in T3 (574.61 ±39.58 kg ha-1) followed by TI (531.65±42.40 kg ha-1) and T2 (514.75±77.91 kg ha-1). It was found that addition of Mola at different densities had no effects on survival and production performance of prawn. Therefore, nutrient-dense Mola may be stocked as an additional species with freshwater prawn. It might be concluded that treatment T3 was better proposition for prawn-Mola polyculture.
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Culture potential of Amblypharyngodon Mola with carps in polyculture in farmers' pond of northern regions of Bangladesh
2009Co-Authors: M. Kunda, S H Thilsted, Wahab, S.a.a. Nahid, N. RoosAbstract:To assess the culture potential of Mola (Amblypharyngodon Mola) along with carps in polyculture systems, an experiment consisted of three treatments each with five replications was conducted for 4 months in two villages of Parbatipur upazilla under Dinajpur district. In the first treatment (SS), catla, rohu, mrigal, grass carp, Thai punti, common carp and a higher density of silver carp (8 per 40m²) were stocked. In the second treatment (SM), stocking density of silver carp was reduced to half and Mola was added at a stocking density of 12,500/ha with all other fishes used in SS. In the third treatment (MM), no silver carp was stocked and Mola was added at a stocking density of 25,000/ha with all other fishes used in SS. All treatments were subjected to the same regime of feed and fertilizers. The yields of large carps were 2035 kg/ha, 1757 kg/ha and 1326 kg/ha for treatments SS, SM and MM, respectively. Catla, grass carp and carpio showed better growth and production performance in presence of Mola at a higher density, while rohu, Thai punti and mrigal showed better performance when stocking density of Mola was relatively low. Mola yield was almost two times higher (184 kg/ha) in absence of silver carp (MM) than (62 kg/ha) in presence of silver carp (SM). The result showed that there was a significantly (p
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Reproductive biology of three important indigenous small fish viz., Mola (Amblypharyngodon Mola), chela (Chela cachius) and punti (Puntius sophore)
Iranian Journal of Fisheries Sciences, 2005Co-Authors: A H M Kohinoor, Islam, S.h. Thulsted, WahabAbstract:Reproductive biology of three important small indigenous fish species Mola (Amblypharyngodon Mola), punti (Puntius sophore) and chela (Chela cachius) was studied for 12 months from January to December, 1999 in the Department of Fisheries Management, Bangladesh Agricultural University, Mymensingh. Gonadosomatic index (GSI) and ova diameter were analysed to determine their reproductive cycle. Three hundreds sixty female and one hundred forty four male samples of each species of fish, Mola (Amblypharyngodon Mola), punti (Puntius sophore) and chela (Chela cachius) were examined in this study. The GSI values for female Mola, punti and chela ranged from 1.78±0.88 to 17.06±2.66, 1.16±0.64 to 24.81±1.50 and 1.34±0.64 to 10.19±2.17, respectively. The highest values of the GSI in Mola and punti were obtained during July while that of chela, during June. The results of monthly observations on the ova diameter indicated that Mola, punti and chela spawned at least twice a year, once during May-July and again during September-October.
Jonathan D. R. Houghton - One of the best experts on this subject based on the ideXlab platform.
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Reply to Logan & Dodge: 'stable isotopes challenge the perception of ocean sunfish Mola Mola as obligate jellyfish predators'.
Journal of fish biology, 2013Co-Authors: Chris Harrod, Jari Syväranta, Lukas Kubicek, Valentina Cappanera, Jonathan D. R. HoughtonAbstract:Syvaranta et al. (2012) recently provided stable-isotope data from eight small-bodied ocean sunfish Mola Mola (L. 1758) captured from the Italian fishing port of Camogli on the Ligurian coast. Representative data were also given for members of pelagic and neritic–coastal food webs. The level of 13C and 15N enrichment shown by M. Mola relative to their putative obligate diet of gelatinous zooplankton (gelata) (based on the locally dominant Pelagia noctiluca and literature data) was used to question their obligate consumption of such prey. Furthermore, the M. Mola were isotopically more similar to neritic rather than pelagic fishes captured locally, prompting the suggestion that juvenile M. Mola may not be obligate predators of gelata, but functionally, they might be part of the neritic and coastal food web. In their comment, Logan & Dodge (2013) have produced a detailed critical analysis of Syvaranta et al.’s (2012) approach, results and conclusions. They are thanked for furthering a much needed debate regarding M. Mola. Here, a response is made to their comments with the provision of additional quantitative analysis that strengthen the original conclusions. Logan & Dodge (2013) provide an excellent summary of isotopic variation in gelata across different marine areas worldwide. Although their summary of data from the north-east Pacific and north-west Atlantic Oceans are of great value to workers interested in gelatinous zooplankton, their relevance to Mediterranean M. Mola is limited and they are not considered further here. As Logan & Dodge (2013) suggest, however, the M. Mola sampled by Syvaranta et al. (2012) may have migrated to the Mediterranean Sea from the north-east Atlantic Ocean prior to capture; therefore, their summaries from the Mediterranean Sea (where the M. Mola were captured) and
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reply to logan dodge stable isotopes challenge the perception of ocean sunfish Mola Mola as obligate jellyfish predators
Journal of Fish Biology, 2013Co-Authors: Chris Harrod, Jari Syväranta, Lukas Kubicek, Valentina Cappanera, Jonathan D. R. HoughtonAbstract:Syvaranta et al. (2012) recently provided stable-isotope data from eight small-bodied ocean sunfish Mola Mola (L. 1758) captured from the Italian fishing port of Camogli on the Ligurian coast. Representative data were also given for members of pelagic and neritic–coastal food webs. The level of 13C and 15N enrichment shown by M. Mola relative to their putative obligate diet of gelatinous zooplankton (gelata) (based on the locally dominant Pelagia noctiluca and literature data) was used to question their obligate consumption of such prey. Furthermore, the M. Mola were isotopically more similar to neritic rather than pelagic fishes captured locally, prompting the suggestion that juvenile M. Mola may not be obligate predators of gelata, but functionally, they might be part of the neritic and coastal food web. In their comment, Logan & Dodge (2013) have produced a detailed critical analysis of Syvaranta et al.’s (2012) approach, results and conclusions. They are thanked for furthering a much needed debate regarding M. Mola. Here, a response is made to their comments with the provision of additional quantitative analysis that strengthen the original conclusions. Logan & Dodge (2013) provide an excellent summary of isotopic variation in gelata across different marine areas worldwide. Although their summary of data from the north-east Pacific and north-west Atlantic Oceans are of great value to workers interested in gelatinous zooplankton, their relevance to Mediterranean M. Mola is limited and they are not considered further here. As Logan & Dodge (2013) suggest, however, the M. Mola sampled by Syvaranta et al. (2012) may have migrated to the Mediterranean Sea from the north-east Atlantic Ocean prior to capture; therefore, their summaries from the Mediterranean Sea (where the M. Mola were captured) and
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Stable isotopes challenge the perception of ocean sunfish Mola Mola as obligate jellyfish predators
Journal of fish biology, 2011Co-Authors: Jari Syväranta, Chris Harrod, Lukas Kubicek, Valentina Cappanera, Jonathan D. R. HoughtonAbstract:Evidence is provided from stable isotope analysis that aggregations of small ocean sunfish Mola Mola (total length
Michael Phillips - One of the best experts on this subject based on the ideXlab platform.
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Carp–Mola productivity and fish consumption in small-scale homestead aquaculture in Bangladesh
Aquaculture International, 2017Co-Authors: Manjurul Karim, Hadayet Ullah, Sarah Castine, Mohammad Mahmudul Islam, Hendrik Jan Keus, Mrityunjoy Kunda, Shakuntala H. Thilsted, Michael PhillipsAbstract:Small indigenous species (SIS) of fish such as the Mola carplet ( Amblypharyngodon Mola ) are rich in nutrients, often containing high levels of zinc, iron, and vitamin A. Despite scientific and government efforts, culture of SIS for improved nutrition is not yet widespread. This paper investigates the contribution of the Mola carplet, commonly referred to in Bangladesh as “Mola” to household fish consumption, and the factors influencing productivity and income from carp–Mola polyculture in southwest Bangladesh. In addition, we assess the effect of inclusion of Mola into carp polyculture ponds on the inputs required to culture fish in homestead ponds. Carp–Mola polyculture farmers ( n = 344) and carp-only polyculture farmers ( n = 513, as controls) were surveyed in May 2013. Mola broodstock were stocked in 4881 homestead ponds, at an average rate of 25 kg ha^−1. The results indicated that pond area, water color (a proxy of phytoplankton abundance) and inorganic fertilizer (primarily urea and TSP) significantly influence Mola production. Smaller ponds proved to have higher productivity than larger ponds. Production and profitability of carp–Mola polyculture system are significantly higher ( P
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carp Mola productivity and fish consumption in small scale homestead aquaculture in bangladesh
Aquaculture International, 2017Co-Authors: Manjurul Karim, Hadayet Ullah, Sarah Castine, Mohammad Mahmudul Islam, Hendrik Jan Keus, Mrityunjoy Kunda, Shakuntala H. Thilsted, Michael PhillipsAbstract:Small indigenous species (SIS) of fish such as the Mola carplet (Amblypharyngodon Mola) are rich in nutrients, often containing high levels of zinc, iron, and vitamin A. Despite scientific and government efforts, culture of SIS for improved nutrition is not yet widespread. This paper investigates the contribution of the Mola carplet, commonly referred to in Bangladesh as “Mola” to household fish consumption, and the factors influencing productivity and income from carp–Mola polyculture in southwest Bangladesh. In addition, we assess the effect of inclusion of Mola into carp polyculture ponds on the inputs required to culture fish in homestead ponds. Carp–Mola polyculture farmers (n = 344) and carp-only polyculture farmers (n = 513, as controls) were surveyed in May 2013. Mola broodstock were stocked in 4881 homestead ponds, at an average rate of 25 kg ha−1. The results indicated that pond area, water color (a proxy of phytoplankton abundance) and inorganic fertilizer (primarily urea and TSP) significantly influence Mola production. Smaller ponds proved to have higher productivity than larger ponds. Production and profitability of carp–Mola polyculture system are significantly higher (P < 0.1) than carp-only polyculture systems. Mola also contributed to household fish consumption, with 47 % of Mola produced in homestead ponds consumed by household members. The results suggest scope for wider dissemination and impact of Mola production technology. Such dissemination might involve closer collaboration among research, governmental, and non-governmental organizations, involving lead farmer selection, farmer-to-farmer visits and result demonstrations and wider communication of the positive outcomes of culturing Mola.
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Carp–Mola productivity and fish consumption in small-scale homestead aquaculture in Bangladesh
Aquaculture International, 2016Co-Authors: Manjurul Karim, Hadayet Ullah, Sarah Castine, Mohammad Mahmudul Islam, Hendrik Jan Keus, Mrityunjoy Kunda, Shakuntala H. Thilsted, Michael PhillipsAbstract:Small indigenous species (SIS) of fish such as the Mola carplet (Amblypharyngodon Mola) are rich in nutrients, often containing high levels of zinc, iron, and vitamin A. Despite scientific and government efforts, culture of SIS for improved nutrition is not yet widespread. This paper investigates the contribution of the Mola carplet, commonly referred to in Bangladesh as “Mola” to household fish consumption, and the factors influencing productivity and income from carp–Mola polyculture in southwest Bangladesh. In addition, we assess the effect of inclusion of Mola into carp polyculture ponds on the inputs required to culture fish in homestead ponds. Carp–Mola polyculture farmers (n = 344) and carp-only polyculture farmers (n = 513, as controls) were surveyed in May 2013. Mola broodstock were stocked in 4881 homestead ponds, at an average rate of 25 kg ha−1. The results indicated that pond area, water color (a proxy of phytoplankton abundance) and inorganic fertilizer (primarily urea and TSP) significantly influence Mola production. Smaller ponds proved to have higher productivity than larger ponds. Production and profitability of carp–Mola polyculture system are significantly higher (P < 0.1) than carp-only polyculture systems. Mola also contributed to household fish consumption, with 47 % of Mola produced in homestead ponds consumed by household members. The results suggest scope for wider dissemination and impact of Mola production technology. Such dissemination might involve closer collaboration among research, governmental, and non-governmental organizations, involving lead farmer selection, farmer-to-farmer visits and result demonstrations and wider communication of the positive outcomes of culturing Mola.
Adam Barnett - One of the best experts on this subject based on the ideXlab platform.
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Adult Emperor angelfish (Pomacanthus imperator) clean Giant sunfishes (Mola Mola) at Nusa Lembongan, Indonesia
Coral Reefs, 2006Co-Authors: Nicolai Konow, Richard Fitzpatrick, Adam BarnettAbstract:[Extract] Over 4 days in October 2004, up to 16 ectoparasite-laden Giant Sunfishes (Mola Mola) were observed off Nusa Lembongan, Indonesia, confirming indigenous reports of annual Mola agregations at a short stretch of coral reef slope. An 'assembly line' of five coral reef species cleaning separate Mola body regions was documented. Butterflyfish species (Chaetodon kleinii and Heniochus diphreutes) cleaned the ventral and head areas respectively, while wrasses (Labroides dimidiatus and Thalasoma lunare) covered flank regions. Surprisingly, of 37 observed cleaning events, ~40% were dominated by large Emperor angelfishes, Pomacanthus imperator (n≤12;total length
