Quantification of climate change implications for water-based management: A case study of oyster suitability sites occurrence model along the Kenya coast

Aura, Christopher Mulanda; Musa, Safina; Osore, Melckzedeck K.; Kimani, Edward; Alati, Victor Mwakha; Wambiji, Nina; Maina, George W.; Charo‐Karisa, Harrison

doi:10.1016/j.jmarsys.2016.09.007

Cited by 8 publications

(4 citation statements)

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“…The development of the delineation process followed the methods described by Perez et al (2005) and Aura et al (2016, 2017), as modified to account for local conditions. Separate thematic maps of constraints on development, distance from the shoreline, water depth, and various aspects of water quality were created within a geographic information system (GIS).…”

Section: Methodsmentioning

confidence: 99%

“…Several studies have developed site suitability mapping for a range of aquatic farming activities using methods such as multi‐criteria evaluation (e.g., Aura et al, 2016, 2017; Buitrago et al, 2005; Malczewski, 1999; Radiarta et al, 2008) and habitat suitability indices (e.g., Cho et al, 2012). Most have focused on marine systems, however, with very few having been developed in relation to artisanal fisheries and inland aquaculture systems, especially in developing nations such as in Africa (Aguilar‐Manjarrez & Nath, 1998).…”

Section: Introductionmentioning

confidence: 99%

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A GIS‐based approach for delineating suitable areas for cage fish culture in a lake

et al. 2021

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We present a GIS‐based approach to the delineation of areas that have different levels of suitability for use as tilapia cage culture sites the Kenyan part of Lake Victoria, Africa. The study area was 4,100 km2. The method uses high‐resolution bathymetric data, newly collected water quality data from all major fishing grounds and cage culture sites, and existing spatial information from previous studies. The parameters considered are water depth, water temperature, levels of dissolved oxygen, chlorophyll‐aconcentrations, distances to the lake shoreline and proximity to other constraints on cage culture development. The results indicated that the area most suitable for fish cages comprised about 362 km2, or approximately 9% of the total area; the remaining 91% (i.e., 3,737 km2) was found to be unsuitable for tilapia cage culture. We conclude that the successful implementation of this approach would need stakeholder involvement in the validation and approval of potential sites, and in the incorporation of lake zoning into spatial planning policy and the regulations that support sustainable use while minimising resource use conflicts. The results of this study have broader applicability to the whole of Lake Victoria, other African Great Lakes, and any lakes in the world where tilapia cage culture already occurs or may occur in the future.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A GIS‐based approach for delineating suitable areas for cage fish culture in a lake

et al. 2021

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“…Negative Positive 1988-1998 1990-2000 1994-2004 1997-2007 important for bivalve productivity. GIS suitability methods (Handisyde et al, 2006;Saitoh et al, 2011;Liu et al, 2013;Aura et al, 2017) and end-to-end models address productivity under ocean acidification and carrying capacity (Bell et al, 2013;Guyondet et al, 2015) to identify winner and loser species (Filgueira et al, 2016;Froehlich et al, 2018), and provide a very complete understanding on how the environment influences mussel performance in a farm (Matzelle et al, 2015). In general, this particular body of work is based on a sensitivity-type approach, where key variables for bivalve production are changed based on the most feasible scenarios projected for climate change in the future.…”

Section: Phasementioning

confidence: 99%

Spatial Planning of Marine Aquaculture Under Climate Decadal Variability: A Case Study for Mussel Farms in Southern California

et al. 2019

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The growth of marine aquaculture over the 21st century is a promising venture for food security because of its potential to fulfill the seafood deficit in the future. However, to maximize the use of marine space and its resources, the spatial planning of marine aquaculture needs to consider the regimes of climate variability in the oceanic environment, which are characterized by large-amplitude interannual to decadal fluctuations. It is common to see aquaculture spatial planning schemes that do not take variability into consideration. This assumption may be critical for management and for the expansion of marine aquaculture, because projects require investments of capital and need to be profitable to establish and thrive. We analyze the effect of climate variability on the profitability of hypothetical mussel aquaculture systems in the Southern California Bight. Using historical environmental data from 1981 to 2008, we combine mussel production and economics models at different sites along the coast to estimate the Net Present Value as an economic indicator of profitability. We find that productivity of the farms exhibits a strong coherent behavior with marketed decadal fluctuations that are connected to climate of the North Pacific Basin, in particular linked to the phases of the North Pacific Gyre Oscillation (NPGO). This decadal variability has a strong impact on profitability both temporally and spatially, and emerges because of the mussels' dependence on multiple oceanic environmental variables. Depending on the trend of the decadal regimes in mussel productivity and the location of the farms, these climate fluctuations will affect cost recovery horizon and profitability for a given farm. These results suggest that climate variability should be taken into consideration by managers and investors on decision making to maximize profitability.

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“…Preliminary information on suspended sediments was obtained from turbidity analysis of the kd490 Visible Infrared Imaging Radiometer Suite (VIIRS) [ [16] , [17] , [18] ]. The kd490 data is a good indicator for assessing turbidity in inshore and shallow waters [ 17 , [19] , [20] , [21] ]. Likewise the empirical formula used [ 17 ], is accurate and realistic for shallow waters as previously demonstrated in the Chesapeake Bay.…”

Section: Introductionmentioning

confidence: 99%

Suspended sediment transport generated by non-hydrostatic hydrodynamics in Northern Waters of Aceh, Indonesia

Setiawan

Haditiar

Syukri

et al. 2023

Heliyon

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Quantification of climate change implications for water-based management: A case study of oyster suitability sites occurrence model along the Kenya coast

Cited by 8 publications

References 44 publications

A GIS‐based approach for delineating suitable areas for cage fish culture in a lake

A GIS‐based approach for delineating suitable areas for cage fish culture in a lake

Spatial Planning of Marine Aquaculture Under Climate Decadal Variability: A Case Study for Mussel Farms in Southern California

Suspended sediment transport generated by non-hydrostatic hydrodynamics in Northern Waters of Aceh, Indonesia

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