Field guide to requiem sharks (Elasmobranchiomorphi: Carcharhinidae) of the Western North Atlantic

Grace, Mark (2001) Field guide to requiem sharks (Elasmobranchiomorphi: Carcharhinidae) of the Western North Atlantic. Seattle, WA, NOAA/National Marine Fisheries Service, (NOAA Technical Report NMFS, 153)

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Identification problems are common for many sharks due to a general lack of meristic characteristics that are typically useful for separating species. Other than number of vertebrae and number and shape of teeth, identifications are frequently based on external features that are often shared among species. Identification problems in the field are most prevalent when live specimens are captured and releasing them with a minimum of stress is a priority (e.g., shark tagging programs). Identifications must be accurate and conducted quickly but this can be challenging, especially if specimens are very active or too large to be landed without physical damage. This field guide was designed primarily for use during field studies and presents a simplified method for identifying the 21 species of western North Atlantic Ocean sharks belonging to the family Carcharhinidae (carcharhinids). To assist with identifications a dichotomous key to Carcharhinidae was developed, and for the more problematic Carcharhinus species (12 species), separation sheets based on important distinguishing features were constructed. Descriptive text and illustrations provided in the species accounts were developed from field observations, photographs, and published references. (PDF file contains 36 pages.)

Item Type: Monograph or Serial Issue
Title: Field guide to requiem sharks (Elasmobranchiomorphi: Carcharhinidae) of the Western North Atlantic
Personal Creator/Author:
Grace, Mark
Series Name: NOAA Technical Report NMFS
Number: 153
Date: 2001
Publisher: NOAA/National Marine Fisheries Service
Place of Publication: Seattle, WA
Issuing Agency: United States National Marine Fisheries Service
Subjects: Ecology
Item ID: 2503
Depositing User: Patti M. Marraro
Date Deposited: 24 Jul 2009 18:19
Last Modified: 29 Sep 2011 18:58

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