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

Length-Weight Relationship of Demersal Fish from the Eastern Coast of the Mouth of the Gulf of California

2010 ◽  
Vol 5 (6) ◽  
pp. 494-502 ◽  
Author(s):  
J.T. Nieto-Nava ◽  
M. Zetina- Rejon ◽  
F. Arreguin- Sanchez ◽  
N.E. Arcos- Huitron ◽  
E. Pena- Messina
Keyword(s):  
Gulf Of California ◽  
Demersal Fish ◽  
Eastern Coast ◽  
Weight Relationship ◽  
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.

ROLE OF TESTOSTERONE IN PROGESTERONE-INDUCED INCUBATION BEHAVIOUR IN MALE RING DOVES (STREPTOPELIA RISORIA)

1969 ◽  
Vol 44 (1) ◽  
pp. 13-22 ◽  
Author(s):  
JUDITH M. STERN ◽  
D. S. LEHRMAN
Keyword(s):  
Reproductive Cycle ◽  
Testosterone Propionate ◽  
Male Courtship ◽  
Courtship Display ◽  
Streptopelia Risoria ◽  
Incubation Behaviour ◽  
Ring Doves ◽  
Relationship Of ◽  
Synergistic Relationship

SUMMARY The effectiveness of progesterone (100 μg./day, × 7) in inducing incubation behaviour in male ring doves is markedly diminished by castration. Priming with testosterone propionate (200 μg./day, × 14) restored the effectiveness of progesterone in eliciting this behaviour to the levels in intact males. The synergistic relationship of these two hormones with regard to incubation behaviour contrasts with the inhibition by progesterone of an androgen-dependent male courtship display, the bowing-coo. The behavioural changes observed after these endocrine treatments are fully consistent with the normal sequence of changes in behaviour characterizing the transition from the courtship phase to the incubation phase of the reproductive cycle.

scholarly journals Optimizing Harvest Time Through Absolute and Relative Growth of the Black Clam, Chionista fluctifraga, Cultivated in the Intertidal Along the Southeastern Coast of the Gulf of California

2021 ◽  
Vol 22 (2) ◽  
Author(s):  
Andrés Martín Góngora-Gómez ◽  
María José Acosta-Campos ◽  
María Fernanda Navarro-Chávez ◽  
Hervey Rodríguez-González ◽  
Lizeth Carolina Villanueva-Fonseca ◽  
...  
Keyword(s):  
Growth Rate ◽  
Body Weight ◽  
Gulf Of California ◽  
Shell Height ◽  
Coefficient Of Determination ◽  
Relative Growth ◽  
Harvesting Time ◽  
Final Survival ◽  
Relationship Of ◽  
First Time

The shell height-body weight relationship of the black clam Chionista fluctifraga cultivated in the intertidal of the southeastern Gulf of California, was evaluated for the first time, to improve the knowledge in determining its harvesting time. Clam seeds (n=900,000; 6.1±1.9 mm) were produced in the laboratory. The culture was divided into pre-fattening in racks on the bottom (2 months) and fattening directly in the bottom (16 months) from May 2018 to October 2019. Each month, 60 (n=1080) clams were randomly selected to stablish the morphometric relationship between shell height (SH) and body weight (BW). The growth rate (mm/d and g/d) was recorded. The SH-BW Interaction in both cultivation phases showed positive allometry. SH in prefattening and fattening registered a growth rate of 0.072 and 0.058 mm/d, respectively. In fattening, the interaction BW-SH displayed a high coefficient of determination (R2=0.99). A final survival rate of 90% was obtained. The results yielded the equations that describe the relative growth of C. fluctifraga for the fattening stage. A harvesting time after 10 months of fattening in the intertidal zone is stablished to reach the commercial size (35 mm, SH).

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