IUCN threat status:

Data Deficient (DD)

Habitat

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Habitat and Ecology

Habitat and Ecology
Dasyatis pastinaca is a demersal brackish to marine water species, found over sandy and muddy bottoms from shallow waters to a depth of approximately 200 m (Whitehead et al. 1984), although it seems to be most abundant in inshore waters. Bottom trawl surveys in the Mediterranean Sea suggest that it is more common in waters <50 m depth (Morey et al. In review, Massuti and Moranta 2003, Relini et al. 2000). This species can sometimes inhabit areas close to estuaries and over rocky reefs. Depth distribution of the biomass index shows values of 1¬?10 kg/km² between depths of 0?100 m, and 0.1?1 kg/km² at depths of 100?200 m (Baino et al. 2001).

D. pastinaca reaches a maximum reported size of 140 cm disc width (DW) and 250 cm total length (TL) (Bauchot 1987, Fisher et al. 1987, Notarbartolo and Bianchi 1998). The size at maturity of females is estimated at about 38 cm DW (Capape et al. 1996) and 60 cm TL/28 cm DW (Ismen 2003). Males mature at a smaller size, estimates ranging from 32 cm DW (Capape et al. 1996) and 50 cm TL/26 cm DW (Ismen 2003). The age at maturity and longevity of this species is unknown.

Females reproduce twice a year (Notarbartolo and Bianchi 1998), however the reproductive age and period of gestation is unknown. In the northern Adriatic, reproduction takes place between September and May, during which pregnant females approach the coast. Bini (1967) reported that pupping occurred between July and August, and 4?9 pups/litter are produced (Notarbartolo and Bianchi 1998). Several localities where the species aggregates during mid June and July are known in the Balearic Islands. These aggregations of mature stingrays are probably related to reproduction (Morey et al. in review.). Young specimens are common in shallow waters over sandy bottoms, and parturition was reported to occur in early July in the eastern Mediterranean (Ismen 2003). Neonates are approximately 20 cm TL (8 cm DW) (Ismen 2003). The rate of population increase and natural mortality are unknown.

D. pastinaca feed mainly on demersal and benthic animals, such as crustaceans, cephalopods, clams, polychaetes and fish (Notarbartolo and Bianchi 1998, Whitehead et al. 1984). In a study by Ismen (2003), crustaceans represented more than 99% of the diet when pooling all size classes, but teleost fish were of increasing importance in the diet of larger stingrays.

Systems
  • Marine

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Source: IUCN

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