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| DOI | 10.3856/VOL45-ISSUE2-FULLTEXT-6 | ||||||
| Año | 2017 | ||||||
| Tipo | artículo de investigación |
Citas Totales
Autores Afiliación Chile
Instituciones Chile
% Participación
Internacional
Autores
Afiliación Extranjera
Instituciones
Extranjeras
The longnose stingray (Dasyatis guttata) is a target species in the artisanal fisheries of the southern Gulf of Venezuela. Despite its economic importance, nowadays, studies about its status are lacking. During six continuous months (18 working days in total), we followed the artisanal fishery activities from Zapara Island, and evaluated morphometric characteristics, sex ratio, and the capture per unit effort (CPUE/ind/1000 hooks) of D. guttata. Biological sampling included: disc widths (AD), body mass total (PT), and sex. Using statistical analysis we assessed: a) the length-weight relationships by sex, b) monthly body condition, using the Fulton Index (K), and c) the CPUE. We evaluated 210 individuals of D. guttata. The mean values of our results were: AD = 64.14 +/- 13.18cm (range 32-95 cm); PT = 8.36 +/- 4.87 kg (range 0.80-24.50 kg). The sexual proportion was (2.26 female. : 1 male) (chi(2) = 31.716, P < 0.05); hence we presume a spatial segregation occurred between females and males in the studied area. Length-weight relationship was statistically significant (P < 0.0001), and also varied according to the sex female : PT(kg) = [(0.00027) x (AD(cm)(2.46))]; male: PT(kg) = [(0.00035) x(AD(cm)(2.34))]. The K value showed differences between sexes during November and December. We obtained a CPUE of 4.88 individuals/1000 hooks. We compared our findings with previous research carried out in the southern Caribbean. Further research about this species in the area is recommended.
| Ord. | Autor | Género | Institución - País |
|---|---|---|---|
| 1 | Barrios-Garrido, Hector | Hombre |
La Univ Zulia Maracaibo - Venezuela
La Univ Zulia - Venezuela James Cook Univ - Australia Universidad del Zulia Maracaibo - Venezuela Universidad del Zulia - Venezuela James Cook University - Australia Universidad Del Zulia Facultad Experimental de Ciencias - Venezuela James Cook University, Australia - Australia |
| 2 | Bolivar, Jossimar | - |
La Univ Zulia Maracaibo - Venezuela
Universidad del Zulia Maracaibo - Venezuela Universidad Del Zulia Facultad Experimental de Ciencias - Venezuela |
| 3 | Benavides, Leonardo | Hombre |
La Univ Zulia Maracaibo - Venezuela
Universidad del Zulia Maracaibo - Venezuela Universidad Del Zulia Facultad Experimental de Ciencias - Venezuela |
| 4 | Viloria, Jessica | Mujer |
La Univ Zulia Maracaibo - Venezuela
Universidad del Zulia Maracaibo - Venezuela Universidad Del Zulia Facultad Experimental de Ciencias - Venezuela |
| 5 | Dugarte, Fabby | - |
La Univ Zulia Maracaibo - Venezuela
Universidad del Zulia Maracaibo - Venezuela Universidad Del Zulia Facultad Experimental de Ciencias - Venezuela |
| 6 | Wildermann, Natalie | Mujer |
La Univ Zulia Maracaibo - Venezuela
La Univ Zulia - Venezuela James Cook Univ - Australia Universidad del Zulia Maracaibo - Venezuela Universidad del Zulia - Venezuela James Cook University - Australia Universidad Del Zulia Facultad Experimental de Ciencias - Venezuela James Cook University, Australia - Australia |