Fishery dynamics of the mantis shrimp Squilla mantis (Crustacea: Stomatopoda) population off the Ebro delta (northwestern Mediterranean)

Abelló, Pere; Martín, Paloma

doi:10.1016/0165-7836(93)90048-c

Cited by 30 publications

(46 citation statements)

References 14 publications

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“…The bathymetric distribution of S. mantis is linked to muddy bottoms. The pattern of abundance with depth is similar to that found in the closely related species Squilla empusa in the Gulf of Mexico, which also prefers muddy areas (Abelló and Martín, 1993).…”

Section: Discussionsupporting

confidence: 56%

“…Conversely, catches are much increased in winter, when mating takes place (Piccinetti and Piccinetti-Manfrin, 1971). Catches are further increased in late autumn (November-December) with the incorporation of new recruits (Abelló and Martín, 1993). In the Adriatic, the catch increases in autumn (November-December) also, as a by catch of the sole fishery (Piccinetti and PiccinettiManfrin, 1995).…”

Section: Discussionmentioning

confidence: 99%

“…Seasonal variations in catchability result from reduced out-of-burrow activity, because females stay a long time and do not exit their burrow when they are incubating their egg mass (decreasing their catchability) in spring and early summer (Giovanardi and Piccinetti-Manfrin, 1984;Froglia, 1996). Additionally, catches also diminish in spring and summer because the adults disappear from the population after spawning (Abelló and Martín, 1993). Conversely, catches are much increased in winter, when mating takes place (Piccinetti and Piccinetti-Manfrin, 1971).…”

Section: Discussionmentioning

confidence: 99%

“…This behaviour makes the species less vulnerable to the fishery in areas where trawling is forbidden at night (Spanish waters) (Maynou et al, 2005). According to Abelló and Martín (1993), there is no clear distribution pattern of size by depth, although they found that juveniles were more abundant in waters shallower than 30m depth. Piccinetti and Piccinetti-Manfrin, (1971) reported a certain variability in catches by depth and season, and suggested that temperature may play a role in determining Local migration of S. mantis in search of optimal temperature .…”

Section: Discussionmentioning

confidence: 99%

“…It is the only stomatopod crustacean commercially exploited in the Mediterranean and it is regularly found in the fish markets of Spain, Italy, Egypt, France and Morocco (Abelló and Martín, 1993). This Mantis Shrimp is found in high densities in areas with suitable burrowing substrates: fine sand and sandy mud, especially where the influence of river run-off is important (Atkinson et al, 1997).…”

Section: Introductionmentioning

confidence: 99%

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Distribution and Abundance of the Mantis Shrimp Squilla mantis (Crustacea: Stomatopoda) in Tunisian Waters: Gulfs of Tunis, Hammamet and Gabes

Mili¹,

Ennouri²,

Jarboui³

et al. 2013

GJLS

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The mantis shrimp Squilla mantis is a crustacean Stomatopod of the family of the Squillidae. This specie is found in high densities in areas with suitable burrowing substrates in the Mediterranean Sea. The objectives of the present study were to characterize the distribution and the abundance of the spot-tail mantis shrimp caught in Tunisian waters. The Spot-tail mantis shrimp is exploited in this area and it is still considered as a bycatch, but its abundance makes it important for fisheries. Information about distribution, abundance and size composition of the Squilla mantis were obtained from trawl surveys, carried out in the Tunisian Gulfs monthly for a period of two years. A total of 643 hauls were made and 22,878 specimens were captured. This study shows that this mantis shrimp is very abundant in the Tunisian waters, especially in the Gulf of Tunis, Hammamet and Gabes. S. mantis has a wide geographic distribution, since it was collected in all the major areas investigated, but differences were highlighted among the geographic sectors sampled. Maximum abundances occur shallower than 50 m depth. The values of the catches vary seasonally, the highest of which occurring in summer and autumn. Adults disappeared from the population during winter whereas females do not exit their burrow during incubation. The variability of the catches is due to the effect of several factors such as the effect of month, season, depth, hour, luminosity, weather... This specie is more closely related to crustaceans, cephalopods and benthic fish's. According to the depth, no variation in length distributions of Squilla mantis is observed. The fact that egg-bearing females do not exit their burrow during incubation makes the catch ability lower during day-time. Trawling as well is not permitted shallower than 50 m in the Tunisian waters which may protect these species from fishing.

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Section: Discussionsupporting

confidence: 56%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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