REPRODUCTIVE CYCLE OF THE ROCK OYSTER HYOTISSA HYOTIS (LINNE, 1758) (GRIPHAEIDAE) AT THE LA BALLENA ISLAND, GULF OF CALIFORNIA, MEXICO

2005 ◽  
Vol 24 (4) ◽  
pp. 987-993 ◽  
Keyword(s):  
Reproductive Cycle ◽  
Gulf Of California ◽  
Rock Oyster

Reproductive cycle and maternal-embryonic nutritional relationship of shovelnose guitarfishPseudobatos productusin the Gulf of California

2016 ◽  
Vol 90 (3) ◽  
pp. 889-905 ◽  
Author(s):  
A. E. Romo-Curiel ◽  
O. Sosa-Nishizaki ◽  
J. C. Pérez-Jiménez ◽  
M. C. Rodríguez-Medrano
Keyword(s):  
Reproductive Cycle ◽  
Gulf Of California ◽  
Relationship Of

scholarly journals Reproduction of Megapitaria squalida (Bivalvia: Veneridae) in the Southeast Gulf of California, Mexico

2017 ◽  
Vol 65 (3) ◽  
pp. 881 ◽  
Author(s):  
Ernesto Álvarez-Dagnino ◽  
Apolinar Santamaría-Miranda ◽  
Manuel García-Ulloa ◽  
Andrés Martín Góngora-Gómez
Keyword(s):  
Reproductive Cycle ◽  
Gulf Of California ◽  
Histological Analysis ◽  
Conservation Strategies ◽  
Oocyte Size ◽  
Spawning Activity ◽  
Two Peaks ◽  
Management And Conservation ◽  
Clam Population ◽  
Resting Period

Bivalves reproductive cycle varies according to the particular environmental conditions where they are found, and these reproductive details represent basic information for their capture, management and conservation strategies. With this objective, the reproductive cycle of the clam Megapitaria squalida, inhabiting the Southeast of the Gulf of California (Altata Bay, Sinaloa, Mexico), was studied using histology and changes in the number and size of oocytes, from June 2013 to June 2014. Histological analysis of the gonads showed spawning activity throughout the year, with two peaks. The first was registered in October and it was accompanied by the highest decrease of weight; the second was in February with the highest percentage of spawning population; besides, a resting period was observed in December. The sex-ratio (female:male) of the clam population was 1.08:1 (χ2 = 5.72, d.f. = 1, P < 0.05). Mean oocyte size and number were different (P < 0.05) among all sampling months and fluctuated from 34.6 ± 5.8 µm in June 2014, to 41.9 ± 6.8 µm in February 2014, and from 443.8 ± 424.5 in February 2014, to 1 214.4 ± 267.6 counted in April, respectively. With these results we suggest a protection season from October to November, when the most intense release of gametes occur in this population.

scholarly journals Reproductive Cycle and Size at First Maturity in Females of Brown Crab Callinectes Bellicosus (Stimpson 1859) in the Southwestern Gulf of California, Mexico

2021 ◽  
Vol 79 (3) ◽  
pp. 125-135
Author(s):  
Genaro Diarte-Plata ◽  
Ruth Escamilla-Montes ◽  
Salvador Granados-Alcantar ◽  
Antonio Luna-Gonzalez
Keyword(s):  
Reproductive Cycle ◽  
Gulf Of California ◽  
Carapace Width ◽  
Staining Technique ◽  
Entire Study ◽  
The Pacific ◽  
Maturity Period ◽  
Hematoxylin And Eosin ◽  
First Maturity ◽  
Size At First Maturity

Abstract The reproductive cycle of the crustacean family Portunidae on the coast of the Pacific is not well known. Therefore, the reproductive cycle and the size at first maturity of brown crab Callinectes bellicosus and its relationship with environmental factors in the El Colorado Lagoon, Ahome, Sinaloa has been determined. A total of 360 females were collected from March 2012 to March 2013. The gonads were fixed in 10% formalin, histological cuts were made by the paraffin inclusion method and the hematoxylin and eosin staining technique. The diameter of oocytes was determined by stage. The size at first maturity was estimated by a logistic model. Females showed gametogenic activity during the entire study period. The maturity period was from March to November 2012, with two spawning peaks, in September 2012 and March 2013. Maturity was inversely influenced by temperature (r = -0.4454, P < 0.05) and no influence by salinity was observed (P > 0.05). The diameter of the oocytes showed significant differences between the development stages of the gonad (P = 0.001). The size at first maturity was 11.57 cm of carapace width for females of C. bellicosus.

Reproductive biology of the banded guitarfish, Zapteryx exasperata, from the Gulf of California, México

2009 ◽  
Vol 89 (8) ◽  
pp. 1655-1662 ◽  
Author(s):  
María-Del-Pilar Blanco-Parra ◽  
J. Fernando Márquez-Farías ◽  
Felipe Galván-Magaña
Keyword(s):  
Reproductive Biology ◽  
Reproductive Cycle ◽  
Gulf Of California ◽  
Average Length ◽  
Common Species ◽  
Management Plans ◽  
Males And Females ◽  
One Year ◽  
Gravid Females ◽  
Critical Aspects

The banded guitarfish, Zapteryx exasperata, is a common species in the artisanal elasmobranch fisheries in the Gulf of California. Fishery-derived specimens were examined to determine critical aspects of the reproductive biology of this poorly known group of rays. Two functional testes and ovaries were found in males and females respectively. Median size at maturity (L50%) for males was 64 cm total length (TL) and for females 69 cm TL. Average length of gravid females was 78.8±3.8 cm TL. Histological analysis showed no evidence of sperm storage in the oviducal gland. Gestation was estimated to occur over a five to six month period (February–July) and was concurrent with vitellogenesis. Mean uterine fecundity was estimated as 7 (range 2–13, SD. = 3). The sex-ratio of embryos was 1:1. The reproductive cycle for Z. exasperata from the Gulf of California was estimated to last one year with parturition, ovulation and copulation occurring during the summer months. Differences found in the reproductive cycle of Z. exasperata between the Gulf of California and the west coast of Baja California could have implications in the future management plans for this fishery in the Gulf of California.

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