Effects of omnivorous tilapia on water turbidity and primary production dynamics in shallow lakes: implications for ecosystem management

Zhang, Xiufeng; Mei, Xueying; Gulati, R. D.

doi:10.1007/s11160-016-9458-6

Cited by 47 publications

(38 citation statements)

References 45 publications

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“…It has been distributed for aquaculture not only within Africa, but worldwide (Casal 2006, Deines et al 2016 and has established numerous wild populations in tropical and subtropical latitudes, including in China (Shuai et al 2015), in the USA (Lowe et al 2012), in India (Singh et al 2013) and in Brazil (de Azevedo-Santos et al 2011) to name only a few. Detrimental impacts on the local ecosystems due to resource competition with the native fish or habitat alterations due to the grazing behaviour, have been reported from various countries (Crutchfield 1995, Daga et al 2016, Singh et al 2013, Zhang et al 2017. If introduced into catchments that have their own native Oreochromis species, O. niloticus causes threats additionally through hybridization with the local species (Angienda et al 2011, D'Amato et al 2007, Deines et al 2014, Firmat et al 2013.…”

Section: Introductionmentioning

confidence: 99%

The origin and future of an endangered crater lake endemic; phylogeography and ecology of Oreochromis hunteri and its invasive relatives

et al. 2018

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Cichlids of the genus Oreochromis ("Tilapias") are intensively used in aquaculture around the world. In many cases when "Tilapia" were introduced for economic reasons to catchments that were home to other, often endemic, Oreochromis species, the loss of native species followed. Oreochromis hunteri is an endemic species of Crater Lake Chala on the slopes of Mount Kilimanjaro, and is part of a small species flock in the upper Pangani drainage system of Tanzania. We identified three native and three invasive Oreochromis species in the region. Reconstructing their phylogeography we found that O. hunteri is closely related to, but distinct from the other members of the upper Pangani flock. However, we found a second, genetically and phenotypically distinct Oreochromis species in Lake Chala whose origin we cannot fully resolve. Our ecological and ecomorphological investigations revealed that the endemic O. hunteri is currently rare in the lake, outnumbered by each of three invasive cichlid species. It is mitochondrially, phenotypically and trophically distinct from all others. The occurrence of the formerly abundant O. hunteri in such small numbers, its narrow habitat restriction and its limited morphological variability suggest recent population decline and loss of niche breadth in this critically endangered endemic cichlid species.

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Section: Introductionmentioning

confidence: 99%

The origin and future of an endangered crater lake endemic; phylogeography and ecology of Oreochromis hunteri and its invasive relatives

et al. 2018

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“…Impacts from these non-native species include negative effects on water and habitat quality, interactions with native organisms, and the emergence of diseases (Canonico et al 2005;Diana 2009;Vitule et al 2009; Cucherousset and Olden 2011; Córdova-Tapia et al 2015; Deines et al 2016; Zhang et al 2017). Aquaculture with non-native species conflicts directly with Aichi Target 9 (prevention, control, or eradication of non-native species), but the activity is in disagreement with most Aichi Targets (Fig.…”

Section: Prioritizing Non-native Speciesmentioning

confidence: 99%

“…Table 1 presents further information Expansion of aquaculture in reservoirs will conflict with other uses of freshwater resources. An example is the degradation of water quality for human consumption, because cage aquaculture enhances eutrophication processes (Figueredo and Giani 2005;Zhang et al 2017) (Table 1, Fig. 2c-d).…”

Section: Aquaculture Parks In Reservoirsmentioning

confidence: 99%

Aquaculture expansion in Brazilian freshwaters against the Aichi Biodiversity Targets

Lima-Júnior

Magalhães

Pelicice

et al. 2018

Ambio

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The Convention on Biological Diversity proposed the Aichi Biodiversity Targets to improve conservation policies and to balance economic development, social welfare, and the maintenance of biodiversity/ecosystem services. Brazil is a signatory of the Aichi Biodiversity Targets and is the most diverse country in terms of freshwater fish, but its national policies have supported the development of unsustainable commercial and ornamental aquaculture, which has led to serious disturbances to inland ecosystems and natural resources. We analyzed the development of Brazilian aquaculture to show how current aquaculture expansion conflicts with all 20 Aichi Targets. This case suggests that Brazil and many other megadiverse developing countries will not meet international conservation targets, stressing the need for new strategies, such as the environmental management system, to improve biodiversity conservation.

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“…Genetic species improvement promotes enhancing system productivity (Hamzah et al, 2014). Nevertheless, despite innumerable studies in which physical-chemical cultivation water, environmental conditions, fecundity, feeding habits, health and growth conditions on production have been assessed (Shafland & Pestrak, 1982;Watanabe et al, 1993;Sifa et al, 2002;Filho et al, 2009;Domínguez-May et al, 2011;Zhang et al, 2016;Boerlage et al, 2017;Fadla et al, 2017;Gophen, 2017;Hossain et al, 2017;Stickney, 2017;Devic et al, 2018), variability among research results within this species have been reported frequently (Peterman, 2011). This variability could be explained in part by the genetic differences among the particular strains of the species used (Eknath et al, 1993).…”

Section: Introductionmentioning

confidence: 99%

Bioeconomic profitability analysis of tropical gar (Atractosteus tropicus) grow out using two commercial feeds

Espinosa-Chaurand¹,

Aparicio-Simón

Cortés-Sánchez

et al. 2019

LAJAR

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This study compared survival, growth, feed conversion rate (FCR) and harvested biomass of two commercial strains of tilapia (Oreochromis niloticus) cultivated in Mexico: Spring Genetic-Benchmark Holding® originated from the Genetically Improved Farmed Tilapia GIFT (Genebank: GIFT GU477624.1) and strain B from different line-breeding (Genebank: Philippines GU477626.1, Guangdong GU477627.1, and America GU477628.1). The study was performed in six geomembrane ponds (2,520 m 3 ; 30×40×1.5 m) with supplementary aeration, in Los Pozos farm, El Rosario, Sinaloa, Mexico. In July 2016, 26,762 ± 170 fries of each strain (2.9 ± 0.1 g and 5.4 ± 0.2 cm) were cultivated in the nursery under similar conditions in triplicate at 11 ind m-3 for 34 days; then, they were transferred to the grow-out ponds and fed with 30% crude protein balanced feed (Purina®) at a rate of 12% live weight day-1 in three rations (07:00, 12:00 and 17:00 h) for 123 days. The results showed that Spring had a lower variation coefficient (VC) and higher survival, growth rate in weight, initial and final size, and harvested biomass. Survival was 30.7% greater in Spring and doubled harvested biomass (Spring 10 ± 0.8 t ha-1 vs. B strain 5 ± 4.7 t ha-1). Sixty percent of the Spring population reached a commercial weight of 500 g in day 123th of cultivation compared with 20% of B population in the same period. Except for FCR, VC was lower in the Spring strain. Differences in productive parameters were probably due to the genetic selection programs at which both strains were subjected.

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Effects of omnivorous tilapia on water turbidity and primary production dynamics in shallow lakes: implications for ecosystem management

Cited by 47 publications

References 45 publications

The origin and future of an endangered crater lake endemic; phylogeography and ecology of Oreochromis hunteri and its invasive relatives

The origin and future of an endangered crater lake endemic; phylogeography and ecology of Oreochromis hunteri and its invasive relatives

Aquaculture expansion in Brazilian freshwaters against the Aichi Biodiversity Targets

Bioeconomic profitability analysis of tropical gar (Atractosteus tropicus) grow out using two commercial feeds

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