TY - JOUR
T1 - Seasonal reproduction of sailfish Istiophorus platypterus from the southeast Mexican Pacific
AU - Cerdenares-Ladrón de Guevara, Genoveva
AU - Morales-Bojórquez, Enrique
AU - Rodríguez-Jaramillo, Carmen
AU - Hernández-Herrera, Agustín
AU - Abitia-Cárdenas, Andrés
N1 - Funding Information:
Thanks to the sponsor Consejo Nacional de Ciencia y Tecnología for support received through the project contract SEP-CONACYT 60376. The authors are indebted to Gabriela González-Medina, Carmen Alejo-Plata, Samuel Ramos-Carrillo and Tania Martínez-Peña of the Universidad del Mar who participated in field data collection and María Eulalia Meza Chávez for histological processing. We thank two anonymous reviewers who offered valuable suggestions that greatly improved the presentation and readability of this article. AHH and AAC received fellowships from the Comisión de Opera-ción y Fomento de Actividades Académicas del Instituto Politécnico Nacional, and Programa de Estímulos al Desempeño de los Investigadores del Instituto Politécnico Nacional.
PY - 2013/5
Y1 - 2013/5
N2 - Quantitative histology was used to analyse the seasonal reproductive characteristics of the Istiophorus platypterus sailfish obtained from bycatch and recreational catches in the southeast Mexican Pacific. The analysis revealed five stages of ovarian development, eight kinds of oocytes, and one postovulation structure. The species shows an asynchronous ovary development and indeterminate fecundity. Gonadosomatic indices (GSI) indicated that sailfish have a reproductive period with peaks in September and October (mean monthly GSI=1.9 and 1.8). Females were more abundant during the second quarter, whereas males were more abundant in the third and fourth quarters. We found that the estimates of the frequency distribution of whole oocytes showed that this analysis may be useful as a tool to assess maturity. The estimated size at sexual maturity for this species in the Gulf of Tehuantepec was 150.2 cm eye-fork length.
AB - Quantitative histology was used to analyse the seasonal reproductive characteristics of the Istiophorus platypterus sailfish obtained from bycatch and recreational catches in the southeast Mexican Pacific. The analysis revealed five stages of ovarian development, eight kinds of oocytes, and one postovulation structure. The species shows an asynchronous ovary development and indeterminate fecundity. Gonadosomatic indices (GSI) indicated that sailfish have a reproductive period with peaks in September and October (mean monthly GSI=1.9 and 1.8). Females were more abundant during the second quarter, whereas males were more abundant in the third and fourth quarters. We found that the estimates of the frequency distribution of whole oocytes showed that this analysis may be useful as a tool to assess maturity. The estimated size at sexual maturity for this species in the Gulf of Tehuantepec was 150.2 cm eye-fork length.
KW - Gulf of Tehuantepec
KW - Size at sexual maturity
KW - oocyte cohort analysis
KW - oocyte development
KW - sailfish reproduction
UR - http://www.scopus.com/inward/record.url?scp=84874494101&partnerID=8YFLogxK
U2 - 10.1080/17451000.2012.742545
DO - 10.1080/17451000.2012.742545
M3 - Artículo
SN - 1745-1000
VL - 9
SP - 407
EP - 420
JO - Marine Biology Research
JF - Marine Biology Research
IS - 4
ER -