Recent research led by Ghoufrane Derhy from the Laboratory of Applied Sciences for the Environment and Sustainable Development at Cadi Ayyad University in Essaouira, Morocco, sheds light on the chub mackerel stocks along the Moroccan Atlantic coast. This study, published in ‘Frontiers in Marine Science,’ highlights the challenges of managing fisheries in developing countries, particularly when data is scarce.
Chub mackerel is a crucial species in Morocco’s small pelagic resources. However, the study reveals that despite its importance, there has been a significant lack of information regarding the stock’s migration patterns and potential exchanges between central and southern populations. Derhy and her team employed two innovative data-limited approaches: the Stochastic Surplus Production model in Continuous Time (SPiCT) and Length Based Spawning Potential Ratio estimation (LBSPR). These methods are particularly useful in settings where traditional stock assessment techniques are impractical due to insufficient data.
The findings indicate that the current harvest levels of chub mackerel are closely aligned with the Maximum Sustainable Yield (MSY), but concerningly, the biomass is below the target level (BMSY), and fishing mortality rates exceed sustainable thresholds (FMSY). Derhy emphasized, “Both models suggest a full to overexploited stock status for the period from 2016 to 2020.” This assessment contrasts with previous analyses that relied solely on survey indices, which indicated a critical stock status over a longer timeframe.
For the energy sector, this research opens up several avenues. Sustainable fisheries management is essential not only for ecological balance but also for the economic health of coastal communities that depend on fishing. By ensuring that chub mackerel stocks are managed effectively, there can be a more stable supply of this fish, which is vital for local markets and export opportunities. Moreover, the study underscores the need for improved data collection and monitoring practices, which could integrate technological advancements, such as satellite tracking and acoustic monitoring, to enhance stock assessments.
As the demand for seafood continues to rise, understanding the dynamics of fish populations like chub mackerel is crucial. The insights from this research can inform policies that promote sustainable fishing practices, which in turn can contribute to the resilience of the fishing industry and coastal economies. By addressing the challenges identified in this study, there is potential for both environmental sustainability and economic growth in the region.
