Mean mass of octopi varied little among pot types: 0.
The predictive relationship between proportional occupancy of traps by octopi (CATCH) and soak times (TIME) was significantly negative.
Stations with the greatest mean catch in this study are regarded as more unknown and difficult to locate; as a result, they may experience less intense harvest pressure by fisheries that interact with octopi (such as Black Sea Bass trapping and scuba diving).
In contrast, the gear modification of adding lids to the plastic pots to retain octopi during haulback seems unnecessary; pot type was not an important factor in model fitting to catch data.
The first is that octopi are more active at warmer temperatures; Whitaker et al.
1991) believed that the peak reproductive activity of octopi off the coast of South Carolina occurred in the spring.
Another explanation for this result is that migrating octopi moving into an area of limestone bottom found the habitat furnished by pots to be more attractive where there is less naturally occurring bottom habitat.
Finally, stations with the greatest catch rates are more difficult to find and may experience lower pressure by fisheries that collect octopi as bycatch.
The difference in weight in favor of the octopi from the Gabes Gulf compared with those of the eastern coast could be explained by temperature and the availability of trophic resources.
The influence of the temperature on abundance of octopi has also studied in Spain by Vargas-Yanez et al.
The difference in monthly growth rate could be explained by a shorter longevity resulting from precocious maturation of the octopi along the eastern coast of Tunisia relative to those of the octopi in the Gabes Gulf, or by a possibility of different populations in these 2 regions.