Climate, Fish Growth, and Fisheries Production
Results indicate that adult condition and juvenile growth rate are enhanced during El Niño conditions. Additionally, El Niño conditions during the birth year showed a positive relationship with fisheries production at peak age of capture five years later. A positive relationship with river flow and growth rate in juveniles and adults was also found. However, no relationship with precipitation was found with fish condition, growth rate, or fisheries production. Lastly, a positive relationship between decreased drought (PDSI) at birth year and fisheries production five years later, indicated a freshwater influence on fisheries production. Based on our results, inter-annual climate variability acting as El Niño has a positive effect on the Gulf Corvina. A possible driver may be freshwater input from increased river flow during El Niño events which enhances growth and fisheries production. These results suggest that relationships between these factors can be used in a predictive manner to adjust harvest limits based on climate variability.