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Reproductive biology of the blue shark Prionace glauca (Chondrichthyes: Carcharhinidae) off Baja California Sur, México
Sperm Quality Over Consecutive Spermatophore Regenerations in the Pacific White Shrimp Litopenaeus vannamei
This procedure allows selecting individuals with high baseline sperm quality based on significant correlations between baseline and regenerated sperm quality observed in the present work, and indicates that the existing spermatophores at stocking of males should be expelled to have higher sperm quality in regenerated sperMatophores.
Growth and reproduction of the lion's paw scallop Nodipecten subnodosus in a suspended culture system at Guerrero Negro lagoon, Baja California Sur, Mexico
- M. Martínez, B. Vázquez, Cesar Ruiz Verdugo, Edgar de Leon, R. C. Duarte, Pedro Martín Domínguez Valdéz
- 1 March 2011
The results, together with the analysis of previous reports, indicate that N. subnodosus has a higher preference for temperate areas; therefore, the Guerrero Negro lagoon appears to be a suitable site to culture this species.
Reproductive biology of the silky shark Carcharhinus falciformis (Chondrichthyes: Carcharhinidae) off the west coast of Baja California Sur, Mexico
The increase in of oocytes instead of ovarian egg and oviducal gland diameters as well as the presence of uterine eggs or developing embryos indicated that female maturation occurred at about 180 cm TL; while clasper development and the existence of sperm clumps indicated that males matured at about 182 cm TL.
A state-by-state comparison of middle school science standards on evolution in the United States
- B. Vázquez
- EducationEvolution: Education and Outreach
- 17 July 2017
The focus of this study is a state-by-state comparison of middle school science standards on evolution in the United States. In 2009, Louise Mead and Anton Mates reviewed the high school science…
Immune Response of Lion’s paw Scallop Nodipecten subnodosus (Sowerby, 1835) Challenged with Vibrio alginolyticus
- Erick Ramsés Ramírez-Castillo, M. Martínez, B. Vázquez, H. González-Ocampo, G. Aguirre-Guzmán, A. Luna-González
บทคดยอ การศกษาการตอบสนองทางภมคมกนของหอยแครงตนสงโต Nodipecten subnodosus (Sowerby, 1835) ตอเชอ Vibrioalginolyticus สายพนธ APSA2 โดยพจารณาจากกจกรรมของไลโซโซมอลเอนไซม ขนาดและจำนวนของเซลลเมดเลอด…
Unusual High Frequency of Hermaphroditism in the Gonochoric Bivalve Megapitaria squalida (Sowerby, 1835) (Veneridae)
- Abril Karim Romo Piñera, B. Vázquez, Federico Andrés García Domínguez, M. Martínez
- 27 November 2009
ABSTRACT Through histological analyses, this investigation reveals an unusual high incidence of hermaphroditism in Megapitaria squalida, a gonochoric species. A total of 684 specimens were sampled at…
Reproductive aspects of "Octopus hubbsorum" (Cephalopoda Octopodidae) from Espíritu Santo Island, southern Gulf of California, Mexico
- Ricardo Pliego Cárdenas, Federico Andrés García Domínguez, B. Vázquez, M. T. V. Fuerte, M. Martínez
Reproductive aspects of Octopus hubbsorum are reported for Espiritu Santo Island, southern Gulf of California (Mexico) and the sex ratio was not significantly different from 1:1 ( P > 0.05) except in November, when more males were captured than females.
Reproductive cycle of the mangrove oyster [i]Crassostrea columbiensis[/i] (Bivalvia: Ostreidae) in Santo Domingo Bay, BCS, México
- Esteban Fernando Félix Pico, B. Vázquez, A. R. Rivera-Camacho, Federico Andrés García Domínguez
- Environmental Science, Biology
It is concluded that temperatures above 22 ° C support the gonadal development of C. columbiensis and a decline may triggerSpawning occurred in all months with different frequencies, apparently the reproductive cycle is related only to temperature.
Female gonad morphology and maturation in Centropages furcatus (Dana, 1852)
The histological analysis revealed that, similar to most calanoid copepods, the sac-shaped ovary of C. furcatus is located dorsally to the centre of the prosoma; oocyte maturation takes place outside the ovary; however, the spatial location of oocytes differs from the one described for the Calanus-type gonad.