TY - JOUR
T1 - Predictive models of the preferential distribution of demersal fish larvae in the southern part of the California current
AU - Peiro-Alcantar, Maria Teresa
AU - Funes-Rodríguez, René
AU - Durazo, Reginaldo
AU - Martínez Rincón, Raúl O.
AU - González-Armas, Rogelio
AU - Trujillo, Sergio Hernández
N1 - Publisher Copyright:
© 2020 CSIC.
PY - 2020
Y1 - 2020
N2 - Habitat characterization provides predictive information about the distribution of species and is useful for assessing habitat quality and population stability. Larval abundance of six frequent and abundant demersal species and the relationship of each with the environment were analysed through generalized additive models to determine their preferential distribution and predictive response to the environmental variables in the southern part of the California Current (25-31°N) between two periods of data collection: 1997-2000 and 2006-2010. Essentially, the main associated variables governing the distribution patterns were related to common and oceanographic characteristics of the water column (temperature and salinity at 50 m depth, dynamic height and degree of water column stratification); however, the set of variables and their ranges are usually species-specific. Species of northern distribution, Sebastes sp. and Citharichtys stigmaeus, were recorded mainly in newly emerged, relatively unstratified waters characterized by a shallow mixed layer and low temperatures. Low dynamic height values were the most significant predictor of larval distribution for Merluccius productus. Citharichthys xanthostigma and Symphurus atricaudus were widespread, distributed across the study area mainly in autumn in unstratified or stratified waters and at a shallow mixed layer. Particularly C. xanthostigma and S. lucioceps were related to high dynamic height values, likely influenced by a coastal flow towards the pole, as evidenced by counter-currents.
AB - Habitat characterization provides predictive information about the distribution of species and is useful for assessing habitat quality and population stability. Larval abundance of six frequent and abundant demersal species and the relationship of each with the environment were analysed through generalized additive models to determine their preferential distribution and predictive response to the environmental variables in the southern part of the California Current (25-31°N) between two periods of data collection: 1997-2000 and 2006-2010. Essentially, the main associated variables governing the distribution patterns were related to common and oceanographic characteristics of the water column (temperature and salinity at 50 m depth, dynamic height and degree of water column stratification); however, the set of variables and their ranges are usually species-specific. Species of northern distribution, Sebastes sp. and Citharichtys stigmaeus, were recorded mainly in newly emerged, relatively unstratified waters characterized by a shallow mixed layer and low temperatures. Low dynamic height values were the most significant predictor of larval distribution for Merluccius productus. Citharichthys xanthostigma and Symphurus atricaudus were widespread, distributed across the study area mainly in autumn in unstratified or stratified waters and at a shallow mixed layer. Particularly C. xanthostigma and S. lucioceps were related to high dynamic height values, likely influenced by a coastal flow towards the pole, as evidenced by counter-currents.
KW - California Current
KW - Demersal fish larvae
KW - Environmental variables
KW - Preferred habitat
UR - http://www.scopus.com/inward/record.url?scp=85090395664&partnerID=8YFLogxK
U2 - 10.3989/scimar.04996.11A
DO - 10.3989/scimar.04996.11A
M3 - Artículo
AN - SCOPUS:85090395664
SN - 0214-8358
VL - 84
SP - 253
EP - 261
JO - Scientia Marina
JF - Scientia Marina
IS - 3
ER -