Critically Endangered totoaba Totoaba macdonaldi: signs of recovery and potential threats after a population collapse

摘要: " The lack of long-term monitoring programs makes it difficult to assess signs population recovery in collapsed marine populations. Fishery-induced changes the life history exploited fishes, such as truncated size and age structure, local extirpations, reductions at maturity, mortality patterns, have occurred. In present study, we explored aspects totoaba Totoaba macdonaldi, almost 40 yr after a collapse, examine whether maintained their pattern identify potential threats using fishing gear (hooks, gillnets). results study indicate that structure was not expected overexploited populations; indeed, similar observed past. known historical distribution range. spatial temporal followed migration patterns totoaba. Total natural were similar. Contrary recommendations for sustainable fisheries, caught fish contained large number juveniles, irrespective method used. We conclude general (size distribution, migration, mortality) has changed since fishery collapse. However, choice could compromise positive trend population. Moreover, poaching is major ongoing threat totoaba."