Habitat suitability for Chilean silverside (Basilichthys microlepidotus) in the Mataquito River, Maule Region: a geospatial approach

2018 ◽  
Vol 69 (8) ◽  
pp. 1301
Author(s):  
Pablo M. Rojas Venegas ◽  
Christian D. Espinoza

Habitat suitability for the Chilean silverside (Basilichthys microlepidotus) in the Mataquito River, located in the Maule Region, was evaluate using geospatial analysis tools. Data were recorded in 2011 (a total of 40 fixed sampling stations) along the Mataquito River, as a result of five limnological surveys (i.e. January, March, June, August and November) in order to characterise the habitat and estimate the abundance of the Chilean silverside in the river. Preference curves were used to describe the dependence of Chilean silverside on relevant physicochemical, hydromorphological and biological parameters. The habitat suitability model showed that the combination of relevant parameters can more accurately explain the presence of a high habitat suitability index in the middle and lower sections of the river, as well as the lower half of the upper section of the Mataquito River. The habitat suitability model provides a comprehensive overall vision of hydrological–hydraulic, morphodynamic and environmental phenomena that determine the dominant habitat for Chilean silverside in the Mataquito River. Understanding the bioecological aspects of Chilean silverside and the dynamics of the Mataquito River system contributes to the establishment of policies for river resource conservation at the local and regional scales.

2020 ◽  
Vol 32 (1) ◽  
pp. 153-172
Author(s):  
Yun-Jin Shim ◽  
Yong-Su Park ◽  
Rae-Ha Jang ◽  
Young-Jun Yoon ◽  
Sun- Ryoung Kim ◽  
...  

2021 ◽  
Vol 39 (1) ◽  
pp. 46-54
Author(s):  
Sung Il Hwang ◽  
Bong Kyun Shin ◽  
Yong Sung Kwak ◽  
Han Gil Choi

2016 ◽  
Vol 50 (4) ◽  
pp. 325-337
Author(s):  
Kathrin J. Munro ◽  
Ian G. Warkentin ◽  
Christine M. Doucet

2019 ◽  
Vol 11 (23) ◽  
pp. 2720 ◽  
Author(s):  
Lee ◽  
Son ◽  
Lee ◽  
Kang ◽  
Lee

The climate-induced changes in marine fishery resources in South Korea have been a big concern over the last decades. The climate regime shift has led to not only a change in the dominant fishery resources, but also a decline in fishery landings in several species. The habitat suitability index (HSI) has been widely used to detect and forecast fishing ground formation. In this study, the catch data of the Todarodes pacificus (Japanese Common Squid) and satellite-derived environmental parameters were used to estimate the HSI for the T. pacificus around South Korea. More than 80% of the total catch was found in regions with a sea surface temperature (SST) of 14.91–27.26 ℃, sea surface height anomaly (SSHA) of 0.05–0.20 m, chlorophyll-a of 0.32–1.35 mg m-3, and primary production of 480.41–850.18 mg C m-2 d-1. Based on these results, the HSI model for T. pacificus was derived. A strong positive relationship (R2 = 0.9260) was found between the HSI and the fishery landings. The climatological monthly mean HSI from 2002 to 2016 showed several hotspots, coinciding with the spawning and feeding grounds of T. pacificus. This outcome implies that our estimated HSI can yield a reliable prediction of the fishing ground for T. pacificus around South Korea. Furthermore, the approach with the simple HSI model used in this study can be applied elsewhere, and will help us to understand the spatial and temporal distribution of fishery resources.


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