Presencia de neonatos y juveniles del tiburón martillo Sphyrna lewini (Griffith & Smith, 1834) y del tiburón sedoso Carcharhinus falciformis (Müller & Henle, 1839) en la costa de Oaxaca, México

Presencia de neonatos y juveniles del tiburón martillo Sphyrna lewini (Griffith & Smith, 1834) y del tiburón sedoso Carcharhinus falciformis (Müller & Henle, 1839) en la costa de Oaxaca, México

The Oaxaca coast in Mexico has a narrow continental shelf and it reaches depths greater than 500 meters near the coast; furthermore it consists of bays and sheltered areas, where high food availability is found. Each week, from March 2001 to December 2005, the unloading areas of artisanal fisheries...

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Autores principales: Alejo-Plata,Carmen, Gómez-Márquez,José L, Ramos,Samuel, Herrera,Eduardo
Lenguaje:Spanish / Castilian
Publicado: Universidad de Valparaíso. Facultad de Ciencias del Mar 2007
Materias:
shark
newborns
young of the year
nursing area
Pacific
Acceso en línea:http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572007000300020
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spelling oai:scielo:S0718-195720070003000202008-03-11Presencia de neonatos y juveniles del tiburón martillo Sphyrna lewini (Griffith & Smith, 1834) y del tiburón sedoso Carcharhinus falciformis (Müller & Henle, 1839) en la costa de Oaxaca, MéxicoAlejo-Plata,CarmenGómez-Márquez,José LRamos,SamuelHerrera,Eduardo shark newborns young of the year nursing area Pacific The Oaxaca coast in Mexico has a narrow continental shelf and it reaches depths greater than 500 meters near the coast; furthermore it consists of bays and sheltered areas, where high food availability is found. Each week, from March 2001 to December 2005, the unloading areas of artisanal fisheries between the bays of Huatulco and Puerto Escondido in the Oaxaca coast were visited. Data on fishing gear and zones, as well as the species composition of the captures were taken. In the zone, three fishery units operated: shark, pelagic and demersal. All three capture sharks in a direct or incidental way. At the studied region, 419 organisms of S. lewini were registered; from August to September newborn individuals (43.9%, 44 to 64 cm of total length), young of the year (9.3% 65-75 cm Tl) and juveniles (30.3%, 75 to 168 cm Tl) were observed; pregnant females were registered in March, May and June with a fecundity ranging from 18 to 24 embryos (35 to 45 cm Tl). With respect to C. falciformis, 1314 individuals were registered. Newborns (4.7%, 65-71 cm Tl) and young of the year (3.8%, 72 to 80 cm Tl) were observed from January to September; juveniles (65.4%, 80 to 170 cm Tl) were captured throughout the year; from January to November, 52 pregnant females were observed with embryos at different developmental stages. The presence of newborns, young of the year and pregnant females with embryos in advanced development condition, suggest that the coastal waters near the shoreline of the Oaxaca coast are a spawning and nursery area for these shark speciesinfo:eu-repo/semantics/openAccessUniversidad de Valparaíso. Facultad de Ciencias del MarRevista de biología marina y oceanografía v.42 n.3 20072007-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572007000300020es10.4067/S0718-19572007000300020
institution Scielo Chile
collection Scielo Chile
language Spanish / Castilian
topic shark
newborns
young of the year
nursing area
Pacific
spellingShingle shark
newborns
young of the year
nursing area
Pacific
Alejo-Plata,Carmen
Gómez-Márquez,José L
Ramos,Samuel
Herrera,Eduardo
Presencia de neonatos y juveniles del tiburón martillo Sphyrna lewini (Griffith & Smith, 1834) y del tiburón sedoso Carcharhinus falciformis (Müller & Henle, 1839) en la costa de Oaxaca, México
description The Oaxaca coast in Mexico has a narrow continental shelf and it reaches depths greater than 500 meters near the coast; furthermore it consists of bays and sheltered areas, where high food availability is found. Each week, from March 2001 to December 2005, the unloading areas of artisanal fisheries between the bays of Huatulco and Puerto Escondido in the Oaxaca coast were visited. Data on fishing gear and zones, as well as the species composition of the captures were taken. In the zone, three fishery units operated: shark, pelagic and demersal. All three capture sharks in a direct or incidental way. At the studied region, 419 organisms of S. lewini were registered; from August to September newborn individuals (43.9%, 44 to 64 cm of total length), young of the year (9.3% 65-75 cm Tl) and juveniles (30.3%, 75 to 168 cm Tl) were observed; pregnant females were registered in March, May and June with a fecundity ranging from 18 to 24 embryos (35 to 45 cm Tl). With respect to C. falciformis, 1314 individuals were registered. Newborns (4.7%, 65-71 cm Tl) and young of the year (3.8%, 72 to 80 cm Tl) were observed from January to September; juveniles (65.4%, 80 to 170 cm Tl) were captured throughout the year; from January to November, 52 pregnant females were observed with embryos at different developmental stages. The presence of newborns, young of the year and pregnant females with embryos in advanced development condition, suggest that the coastal waters near the shoreline of the Oaxaca coast are a spawning and nursery area for these shark species
author Alejo-Plata,Carmen
Gómez-Márquez,José L
Ramos,Samuel
Herrera,Eduardo
author_facet Alejo-Plata,Carmen
Gómez-Márquez,José L
Ramos,Samuel
Herrera,Eduardo
author_sort Alejo-Plata,Carmen
title Presencia de neonatos y juveniles del tiburón martillo Sphyrna lewini (Griffith & Smith, 1834) y del tiburón sedoso Carcharhinus falciformis (Müller & Henle, 1839) en la costa de Oaxaca, México
title_short Presencia de neonatos y juveniles del tiburón martillo Sphyrna lewini (Griffith & Smith, 1834) y del tiburón sedoso Carcharhinus falciformis (Müller & Henle, 1839) en la costa de Oaxaca, México
title_full Presencia de neonatos y juveniles del tiburón martillo Sphyrna lewini (Griffith & Smith, 1834) y del tiburón sedoso Carcharhinus falciformis (Müller & Henle, 1839) en la costa de Oaxaca, México
title_fullStr Presencia de neonatos y juveniles del tiburón martillo Sphyrna lewini (Griffith & Smith, 1834) y del tiburón sedoso Carcharhinus falciformis (Müller & Henle, 1839) en la costa de Oaxaca, México
title_full_unstemmed Presencia de neonatos y juveniles del tiburón martillo Sphyrna lewini (Griffith & Smith, 1834) y del tiburón sedoso Carcharhinus falciformis (Müller & Henle, 1839) en la costa de Oaxaca, México
title_sort presencia de neonatos y juveniles del tiburón martillo sphyrna lewini (griffith & smith, 1834) y del tiburón sedoso carcharhinus falciformis (müller & henle, 1839) en la costa de oaxaca, méxico
publisher Universidad de Valparaíso. Facultad de Ciencias del Mar
publishDate 2007
url http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572007000300020
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