Research@Lincoln

Recent Submissions

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    Comparative growth and morphometric assessment between cultures of wild and hatchery-produced mud crabs
    (Elsevier Ltd, 2021-09) Sarower, MG; Mahmud-Al-Hasan, M; Rahman, MS; Hasan, MM; Ahmmed, Mirja; Ali, MY; Giteru, SG; Banu, GR
    This paper reports the comparative growth, nutritional performance, and morphometric variation between wild and hatchery-reared juvenile mud crabs (Scylla olivacea) in earthen ponds. The crabs were fed daily with boiled tilapia paste at a feeding rate of 5–8% body weight for the first two weeks, followed by feeding with chopped eviscerated tilapia until termination of the experiment. Selected phenotypic trains, including carapace width (CW), carapace length (CL) and abdominal width (AW), were measured weekly. The protein content of the muscle (21.13%), gill (13.51%) and egg (43.28%) were significantly higher in the hatchery-sourced compared to wild female crabs (muscle = 19.15%; gill = 10.09%; egg = 38.15%). Likewise, the hatchery sourced crabs exhibited higher lipid content in the muscle (2.45–2.51%) and eggs (7.51%) compared to the wild counterparts (muscle = 1.45–1.47%; egg =6.15%). These findings suggested a superior nutritional quality of the hatchery-reared compared to the wild-sourced crabs. Although some selected phenotypic traits did not vary among the wild and hatchery-reared crabs (p < 0.05), their survival rates varied significantly depending on the stocking density (p < 0.05). Overall, the findings suggest that the growth characteristics of the hatchery produced and wild-sourced crab were similar, which will help to remove the misconception among the crab farmers about the hatchery seeds and promote diversification of the crab production system for long-term sustainability.
  • ItemOpen Access
    How do mandatory climate-related disclosures affect energy and agriculture markets?
    (2024) Ho, Linh; Renwick, Alan
    With the rise of mandating climate-related disclosures (CRD), this paper investigates how energy and agriculture markets are exposed to climate disclosure risk. Using the multivariable simultaneous quantile regression and data from 1 January 2017 to 29 February 2024, we examine daily and monthly responses of energy and agriculture markets to climate disclosure risk, energy risk, market sentiment, geopolitical risk, and economic policy risk. The sample covers the global market, Australia, Canada, European Union (EU), Hong Kong, Japan, New Zealand, Singapore, the United Kingdom (UK), and the United States (US). The results show that climate disclosure risk creates both positive and negative shocks on the energy and agriculture markets and the impacts are asymmetric across quantiles in different economies. The higher climate disclosure risk, the greater impacts of crude oil future on the energy sector in North America (Canada and the US) and Europe (EU and the UK), but no greater effects in Asia Pacific (Australia, New Zealand, and Singapore). The agriculture sector can hedge against economic policy and geopolitical risks, but it is highly exposed to climate disclosure and energy risks. This study timely contributes to the modest literature on the asymmetric effects of climate disclosure risk on the energy and agriculture markets at the global and national levels. Our findings offer practical implications for policy makers and investment practitioners in understanding financial effects of mandating CRD to diversify risks depending upon market conditions and policy uncertainty.
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    Navigating the depths of marine lipids: From extraction efficiency to flavour enhancement
    (Elsevier, 2023-12-30) Ahmmed, Mirja; Carne, A; Wu, H; Bekhit, A
    Marine lipids are recognised to have substantial importance in biology and human health. These remarkable lipids, which originate from the rich biodiversity of the oceans, hold a unique status for several reasons. Marine lipids provide long-chain omega-3 fatty acids (n-3 LCPUFAs), specifically eicosapentaenoic acid (EPA, C20:5) and docosahexaenoic acid (DHA, C22:6) (Ahmmed, Ahmmed, et al., 2021; Ahmmed, Carne, et al., 2021; Ahmmed et al., 2022a, 2022b; Ahmmed et al., 2023), that play an important role in health and wellbeing (Zhang et al., 2019), and especially brain health (Ahmmed et al., 2020; Ahmmed et al., 2023; Burri et al., 2012).
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    Immunity boosting roles of biofunctional compounds available in aquafoods: A review
    (Elsevier Ltd, 2022-05) Suraiya, S; Ahmmed, Mirja; Haq, M
    Aquafoods are diverse and rich in containing various health functional compounds which boost natural immunity. In this manuscript, the contents of biofunctional compounds such as vitamins, minerals, protein and amino acids, ω-3 polyunsaturated fatty acids, and pigments, etc. in various aquafoods like fishes, molluscs, crustaceans, seaweeds etc. are reported. The functional roles of those compounds are also depicted which enhance the immunecompetence and immunomodulation of the consumers. This paper provides an account of the recommended daily dietary intake level of those compounds for human. Those compounds available in aquafoods are recommended as they fight against various infectious diseases by enhancing immunity. Available reports on the bioactive compounds in aquafoods reveal the immunity boosting performances which may offer a new insight into controlling infectious diseases.
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    Differences in response to a low altitude football training camp supplemented with additional hypoxic training
    (ECSS, 2024-07-02) Hamlin, Michael; Manimmanakorn, A; Manimmanakorn, N; Simpson, C; Davidson, RCR; Tsolakidis, E; Thompson, JL; Ferrauti, A; Piacentini, MF
    Introduction: Living and training at altitude is a popular training method for athletes, however, there is considerable individual variation in subsequent sea-level performance improvement where some athletes adapt successfully, while others do not adapt and fail to improve. Since such training is expensive, time consuming, and normally requires considerable logistical planning, coaches and athletes do not want unsuccessful altitude training experiences. Therefore, the aim of this study was to investigate possible physiological measures that might recognise athletes that respond positively to altitude training compared to those that do not. Methods: This longitudinal study included 20 male football players (20.6 ± 1.1 years, 173.9 ± 4.8 cm, 67.7 ± 8.3 kg, mean ± SD) who undertook an 8-week training camp at 825 m above sea-level (Khonsan, Chaiyaphum Province, Thailand). Players were also supplemented with intermittent hypoxic training via a hypoxicator (Altitude Training Systems, Australia) 15 min/day 3 times/week at FIO2 of 0.15 while cycling at an exercise intensity between 100-120 W. Based on the players 2800-m running performances between baseline and 14 days post training camp, players were separated into responders (improved by 10.7 ± 8.1%, mean ± 95% CI, n=14) and non-responders (decreased by 6.1 ± 12.8%, n = 6). Changes in the 2800 m run performance along with other physiological variables (resting heart rate, arterial oxygen saturation, heart rate variability, haematology and blood lactate) from the 3 trials (baseline, 1, and 14 days post training camp) and stand-ard deviations representing the between-and within-subject variability were estimated using a mixed modelling procedure (Proc Mixed) in the Statistical Analysis System (Version 9.3, SAS Institute, Cary, North Carolina, USA). The effect size statistic (ES) was also calculated. Results: Compared to baseline, the responders had a lower heart rate at 1 (-4.6 ± 2.7 bpm, Effect Size = 1.2) and 14 days (-6.7 ± 3.3 bpm, ES = 1.7) post training camp, whereas the non-responders resting heart rate did not change substantially. Compared to the non-responders, the responders had higher pNN50 at 1 (12.2 ± 11.5, p = 0.04, ES = 1.6) and 14 days (10.1 ± 11.7, p = 0.09, ES = 1.4) post training camp. As a result of the training camp, the responders decreased their LF/HF ratio at day 1 (-1.1 ± 0.6, p < 0.01, ES = 1.0) and day 14 post camp (-0.9 ± 0.6, p < 0.01, ES = 0.8), whereas the non-responders LF/HF ratio moved in the opposite direction (0.8 ± 0.9 and 0.9 ± 0.9), with large effect sizes found between groups (ES = 1.7-1.8). Between-group differences in other variables measured were not substantive. Conclusion: Reduced resting heart rate and increased cardiac parasympathetic tone was associated with improved run performance after the altitude training camp and may be used to differentiate athletes that respond to altitude training compared to those that do not.