Population dynamics of the squids Dosidicus gigas (Oegopsida: Ommastrephidae) and Doryteuthis gahi (Myopsida: Loliginidae) in northern Peru

•Time series of D. gigas and D. gahi catches are not related to thermal anomalies.•Time series of D. gigas and D. gahi catches show that the changes in abundance are related to first order dynamics. This suggests that denso-dependent processes affect populations of these squids. This can be modeled as a function of density observed in previous years.•Population dynamics of squids are related to their life-history strategies.