Pristis


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Pristis

 

(sawfish), the only genus of the family Pristidae. Sawfish are distinguished from other rays by their greatly elongated and flattened snout, which has toothlike structures on both sides. Saw sharks have a similar snout, but sawfish have a flatter body, no cirra, and ventral gill openings. There are seven species, distributed in the tropical and subtropical waters of oceans throughout the world. They live in shallows and occasionally enter rivers. Sawfish feed on fish and on invertebrates, which they sometimes dig up from the sand or mud with their snout. They are oviviviparous, producing 15 to 20 young. The American, or smalltooth, sawfish (P. pectinatus) reaches a length of 4.8 m and a weight of 2 tons. Sawfish have almost no commercial significance, and they are not harmful to man.

References in periodicals archive ?
Analysis of fine-scale daily movement patterns of juvenile Pristis pectinata within a nursery habitat.
Discovery of a pupping site and nursery for critically endangered green sawfish Pristis zijsron.
In our manuscripts, forms of pristis and pistris are frequently confused with each other and with the corresponding forms of piscis and pestis.
D) Cemocotylella elongata (M) Manteria brachydera (D) Stephanostomum casum (D) Tergestia laticollis (D) Caranx hippos Bucephalus introversus (D) Carcharhinus leucas Anthobothrium laciniatum (C) Callitetrarhynchus gracilis (C) Cathetocephalus thatcheri (C) Dasyrhynchus variouncinatus (C) Dermoplithirius maccallumi (M) Erpocotyle carcharhini (M) Heteroncocotyle leucas (M) Nybelinia bisulcata (C) Otobothrium penetrans (C) Phoreiobothrium triloculatum (C) Phyllobothrium leuci (C) Phyllobothrium nicaraguensis (C) Phyllobothrium pristis (C) Platybothrium hypoprioni (C) Cichlasoma sp.
Criteria Water column position Survival Range Family Species (3) (3) (2) Dasyatidae Himantura jenkinsii 1 1 * 1 Pristidae Pristis clavata 1 1 * 1 * Pristidae Pristis microdon 1 1 * 1 * Pristidae Pristis pectinata 1 1 * 1 * Pristidae Pristis zijsron 1 1 * 1 Stegostomatidae Stegostoma fasciatum 1 1 * 1 * Scyliorhinidae Atelomycterus fasciatus 1 1 * 1 Carcharhinidae Carcharhinus amboinensis 1 1 * 1 Carcharhinidae Carcharhinus leucas 1 1 * 1 * Dasyatidae Dasyatis brevicaudatus 1 1 * 1 * Dasyatidae Dasyatis sp.
Cassiepia in poenas signata suas iuxtaque relictam Andromedan, uastos metuentem Pristis hiatus.
While analysis has been made pertaining to the bycatch of protected sea turtles and smalltooth sawfish, Pristis pectinata (Richards (4)), no previous report has attempted to analyze the temporal or spatial distribution of finfish bycatch in this fishery or factors that may influence the rate at which bycatch is caught.
Cabe senalar que este inventario, que sigue el arreglo propuesto por Nelson (1994), no incluye a 10 especies citadas por Castro-Aguirre (1978, 1986) para el area de Tuxpan, pues dichos registros aparentemente proceden de colectas efectuadas en el litoral marino adyacente, y no del interior del sistema estuarino-lagunar (estas fueron los elasmobranquios Rhizoprionodon terranovae, Sphyrna lewini, Pristis perotteti, Dasyatis americana y Aetobatus narinari, y los peces oseos Urophycis floridanus, Floridichthys carpio, Epinephelus adscensionis, Labrisomus nuchipinnis, y Microdesmus carri).
Several protected species were caught in the EGM, including sea turtles (Dermochelyidae, Cheloniidae), bottlenose dolphins, Tursiops truncates, and smalltooth sawfish, Pristis pectinata.
En segundo lugar, interesa el registro de nuevos taxones (Archocentrus myrnae, Asthateros bussingi, Gymnotus maculosus, Paraahromis loisellei entre otros), junto con la correccion y convalidacion del estatus taxonomico y sistematico de algunas especies, por ejemplo Arius se emanni, Archocentrus sajica, Astatheras diquis, Pristis pristis y Pseudocheirodon terrabae.
The association statistic was developed using the species composition of the catch as described by Cass-Calay and Bahnick (12) and applied to goliath grouper, Epinephelus itajara (Cass-Calay and Schmidt (13)) and small-tooth sawfish, Pristis pectinata (Carlson et al.
Squalus blainvillei Hexanchiformes Chalmydoselachus anguineus Heptranchias perlo * Hexanchus griseus Pristiformes Pristis pristis Squatiniformes * Squatina squatina Torpediniformes ?