scholarly journals Gonadal maturity of Crassostrea corteziensis cultivated in the Gulf of California

2020 ◽  
Vol 48 (3) ◽  
pp. 381-395
Author(s):  
Andrés Martín Góngora-Gómez ◽  
Carlos Humberto Sepúlveda ◽  
Héctor Alejandro Verdugo Escobar ◽  
Osvaldo Astorga Castro ◽  
Hervey Rodríguez-González ◽  
...  
Keyword(s):  
Gulf Of California ◽  
Gonadal Development ◽  
Gonadal Maturation ◽  
Natural Production ◽  
Gonadal Maturity ◽  
Post Spawning ◽  
Reproduction Pattern ◽  
Reproductive Phases ◽  
Native Oyster ◽  
Crassostrea Corteziensis

The gonadal maturation of the pleasure oyster Crassostrea corteziensis during four cultivation cycles (November 2004-June 2005, N4J5; August 2014-February 2016, A14F16; September 2015-December 2016, S15D16; September 2016-August 2017, S16A17) was studied in the southeastern Gulf of California, Mexico. Although C. corteziensis exhibited the typical reproductive phases (undifferentiated or resting, initial gametogenesis, advanced gametogenesis, maturity, spawning and post-spawning), the intensity of reproduction and the timing of the onset of the different phases of gonadal development varied in each cultivation cycle. Reproductive peaks were observed in different months (N4J5 in May, A14F16 in July, S15D16 in May and S16A17 in June) during spring and summer. Spawning correlated with temperature in the N4J5 and A14F16 cultivation cycles but it showed no correlation with chlorophyll-a concentration in any of the cultivation cycles. C. corteziensis presented an opportunistic continuous reproductive strategy with spawning occurring during several months of the year. The modification of the species' reproduction pattern could contribute to the natural settlement of larvae, increasing the natural production of this native oyster resource in the southeast of the Gulf of California, where it has been fished intensively.

scholarly journals Induksi Kematangan Gonad Induk Jantan Kerang Abalone (Haliotis asinina) Dengan Metode Laserpunktur [Induction Of Gonad Maturity Males Broodstock Abalone Shell (Haliotis asinina) With Laserpunctur Methods ]

2019 ◽  
Vol 4 (1) ◽  
pp. 7
Author(s):  
Aprilia Putri Astutie, Sudarno, Rahayu Kusdarwati
Keyword(s):  
Reproductive Cycle ◽  
Maximum Level ◽  
Gonadal Development ◽  
Appropriate Technology ◽  
Gonad Maturation ◽  
Male Gonad ◽  
Gonad Maturity ◽  
Gonadal Maturation ◽  
Haliotis Asinina ◽  
Gonadal Maturity

Abstract Abalone is one kind of shellfish fisheries of the world has become a commodity which is currently experiencing increased demand, especially from international markets. As one initial step of a series of required maintenance management process of cultivating a good broodstock, to get the broodstock with the maximum level of gonad maturity is by induction using laserpunctur. Laserpunctur appropriate technology has been shown to accelerate the growth process, increase and accelerate gonadal maturation and spawning shorten the reproductive cycle of some species. The purpose of this study was to determine the effect laserpunctur fired on gonadal organs of the male gonadal maturity of abalone shells and the best energy of the male gonadal maturation affect abalone shells. The treatment used is laserpunctur irradiation on the male gonad organ abalone shells with a energy of 0 Joule (control), 0.5 Joules for 50 seconds, 1 Joule for 100 seconds, 1.5 Joules for 150 seconds and 2 Joule for 200 seconds. Each treatment was repeated four times. The results of this study was the laserpunctur irradiation fired on the gonadal organs influence the development of gonadal maturity of male broodstock abalone shells. The best energy of laserpunctur in the male gonad maturation affects the abalone shells is 1.5 Joules for 150 seconds. The results of histological observation of gonadal male broodstock H. asinina showed varying degrees of gonadal development in the process of gametogenesis is marked with an individual's reproductive cycle.

scholarly journals Gonadal development and sexuality of Larkinia grandis (Arcida: Arcidae) inhabiting southeastern Gulf of California

2021 ◽  
Vol 38 ◽  
pp. 1-10
Author(s):  
Maria I. Sotelo-Gonzalez ◽  
Manuel García-Ulloa ◽  
Andrés M. Góngora-Gómez ◽  
Luis A. Salcido-Guevara ◽  
Juan F. Arzola-González ◽  
...  
Keyword(s):  
Gulf Of California ◽  
Gonadal Development ◽  
Batch Spawning ◽  
Males And Females ◽  
Post Spawning

Larkinia grandis (Broderip & G.B. Sowerby I, 1829), an important fishing resource for Mexican communities, is an Arcidae clam. It is also considered a species with aquaculture potential. In this work we investigated the gonadal phases and sexuality in a population of L. grandis in the Gulf of California. Our findings support the hypothesis that there is one male per female in the population studied. It also documents that the shape, position and color of the gonads of L. grandis are consistent with observations in other Arcidae species. Additionally, five gonadal phases are differentiated and described in males and females (development, mature, spawning, post-spawning and resting), with a noticeable presence of brown cells during post-spawning and the onset of the resting phase, suggesting that those cells are involved in the reabsorption of remnants. Additionally, asynchronous gametogenesis in males, synchronic gametogenesis in females and batch spawning are defined. The results of this contribution can be used in the efforts to protect this bivalve.

Gonadal Development and Histochemistry of the Tropical Oyster, Crassostrea corteziensis (Hertlein, 1951) during an Annual Reproductive Cycle

2008 ◽  
Vol 27 (5) ◽  
pp. 1129-1141 ◽  
Author(s):  
C. Rodríguez-Jaramillo ◽  
M. A. Hurtado ◽  
E. Romero-Vivas ◽  
J. L. Ramírez ◽  
M. Manzano ◽  
...  
Keyword(s):  
Reproductive Cycle ◽  
Gonadal Development ◽  
Annual Reproductive Cycle ◽  
Crassostrea Corteziensis

Gonadal Maturation and Histological observations of S. curvifrons in River Jhelum Kashmir

2018 ◽  
Author(s):  
Sauliheen Qadri ◽  
Tasaduq H Shah ◽  
M. H. Balkhi ◽  
Bilal A. Bhat ◽  
F. A. Bhat ◽  
...  
Keyword(s):  
Gonadosomatic Index ◽  
Gonadal Development ◽  
Spawning Season ◽  
Gonadal Maturation ◽  
Maturity Stages ◽  
Preparatory Phase

The objective of the present study is to describe the phases of gonadal development and determine the spawning season of Schizothorax curvifrons in River Jhelum Kashmir. A total of 298 fish specimen were studied to analyse the gonadosomatic index and maturity stages of S. curvifrons. Five maturity stages namely Immature phase, Preparatory phase, Maturing phase, Ripe/spawning phase and Spent phase were observed in the gonads. Based on GSI values and gonadal conditions, April to June appears to be the spawning season for S. curvifrons

scholarly journals Development of oocytes in a post-spawning Japanese eel Anguilla japonica Temminck & Schlegel in captivity

2018 ◽  
Author(s):  
Satoru Tanaka ◽  
Akihiro Okamura ◽  
Naomi Mikawa ◽  
Yoshiaki Yamada ◽  
Noriyuki Horie ◽  
...  
Keyword(s):  
Hormonal Treatment ◽  
Gonadal Development ◽  
Anguilla Japonica ◽  
Maturation Stage ◽  
Multiple Spawning ◽  
Gonadal Histology ◽  
Final Maturation ◽  
In Captivity ◽  
Post Spawning ◽  
First Time

It is generally believed that parent freshwater eels (Anguilla sp.) die soon after spawning on the assumption that eels are a semelparous (or monocyclic) fish (spawn once at the last stage of life) like Pacific salmonids. However, we observed for the first time a post-spawning female Anguilla japonica again possessed developing oocytes reaching the final maturation stage in captivity five months after the last spawning even without hormonal treatment. Here we describe information on this female about its biological characteristics including gonadal histology and endocrine profiles. The data suggest that lowering water temperature for a period of time is one of the important factors influencing spontaneous gonadal development in this specimen. We also discuss the possibility of induced multiple spawning of this species in captivity.

scholarly journals GONADAL DEVELOPMENT OF DOMESTICATED CORAL TROUT (Plectropomus leopardus) REARED IN FLOATING NET CAGE

2014 ◽  
Vol 6 (1) ◽  
Author(s):  
Sari BM Sembiring ◽  
R Andamari ◽  
A Muzaki ◽  
I K Wardana ◽  
J H Hutapea ◽  
...  
Keyword(s):  
Body Weight ◽  
Research And Development ◽  
Gonadal Development ◽  
Development Stage ◽  
Gonad Maturation ◽  
Gonadal Maturation ◽  
Coral Trout ◽  
Net Cage ◽  
Plectropomus Leopardus ◽  
Maturation Index

<p>Research on Coral trout breeding has been started since 2002 at the Institute of Mariculture Research and Development and currently some hatcheries are being developed around the institute using natural broodstock. To promote the success on this breeding program, it is necessary to study the reproduction development of domesticated coral trout. The fishes were reared in floating net cage. Observation were conducted on 163 fishes in June 2013 with body weight range from 710 -2020 g (average of 1.393 g) and total length with range of 34-49.5 cm. Fishes were dissected and taken  out their gonad for histology preparedness. Histology analyses found that there were 156 female, 2 hermaprodite, 2 male, and 3 unidentified fishes. All female fishes were on early gonadal development (stage I and II with gonadal maturation index of observed coral trout ranged from 0.1 to 1.83). Further analyses showed that several different stages of gonad were found in the same gonad and concluded that coral trout was multiple spawnning order (asynchrounous). Based on the data above, it was concluded that gonad maturation of Coral trout is able to develop in domestication system in floating net cage.</p> <p>Keywords: Gonad, Coral trout (Plectropomus leopardus), hystology, floating net cage</p>

scholarly journals L’INFLUENCE DE L’ALIMENTATION SUR LE DÉVELOPPEMENT DES GONADES ET ANALYSE MORPHOLOGIQUE DE LA MATURATION DU Hyphessobrycon callistus ET DU Trichogaster trichopterus (PISCES, TELEOSTEI)

1998 ◽  
Vol 3 (1) ◽  
Author(s):  
MARIA CECÍLIA BERNARDES PADILHA TRIPPIA
Keyword(s):  
Fresh Water ◽  
Gonadal Development ◽  
Total Weight ◽  
Gonadal Maturation ◽  
Multiple Spawning ◽  
Total Length ◽  
Maturity Stages ◽  
Analyse Morphologique

Foi realizado estudo do comprimento total, peso total e peso das gônadas; dos índices gonadais; da distribuição do diâmetro ovocitário em ovócitos dissociados, assim como de seus maiores diâmetros por exemplar; e dos estádios de maturidade encontrados nos ovários e testículos, em relação à quantidade de alimento ofertado em três diferentes tratamentos de cada experimento, com Hyphessobrycon callistus e com Trichogaster trichopterus (Peixes, Teleostei). O comprimento total e o peso revelaram a tendência de serem diretamente proporcionais à quantidade de alimento ofertado em ambas as espécies, assim como o peso das gônadas em T. trichopterus. Em H. callistus o maior diâmetro ovocitário foi observado no tratamento de menor oferta alimentar, sendo que o maior diâmetro ovocitário de T. trichopterus refere-se ao tratamento de maior oferta alimentar. Em T. trichopterus as fases de desenvolvimento ovocitário encontradas e as escalas de maturidade de ovários e testículos propostas, foram semelhantes às observadas na literatura para outras espécies de Teleósteos dulceaqüícolas. Foi estimada a existência de desova múltipla em ambas as espécies. A maturação gonadal foi menos intensa no tratamento de menor oferta alimentar de T. trichopterus. Abstract Studies on the Hyphessobrycon callistus and Trichogaster trichopterus (Pisces, Teleostei) gonadal development in regard to nourishment were carried out. The following parameters were studied: the total length, total weight and gonads weight; the gonads indexes; the distribution of the oocytary diameter in oocytes dissociated and the maturity stages of ovaries and testicles. The total length and weight were estimated to be directly proportional to the amount of nourishment offered in both species, as well as the gonads weight of T.trichopterus. In H. callistus the largest oocytary diameter was observed in the treatment of the lowest level of nourishment offered, and the largest oocytary diameter of T. trichopterus was observed in the treatment of the highest level of nourishment offered. In T. trichopterus the development oocytary phases and the scales of ovaries and testicles maturity proposed were similar to the ones observed in the literature for other species of fresh water Teleosts. The existence of multiple spawning in both species was estimated. The gonadal maturation was less intense in the treatment of the lowest level of nourishment offered, in T. trichopterus.

scholarly journals Differential leucokocyte counts in ''dourado'', Salminus maxillosus Valenciennes, 1840, from the Mogi-Guaçu River, Pirassununga, SP

2003 ◽  
Vol 63 (3) ◽  
pp. 517-525 ◽  
Author(s):  
M. J. T. Ranzani-Paiva ◽  
E. L. Rodrigues ◽  
M. L. Veiga ◽  
A. C. Eiras ◽  
B. E. S. Campos
Keyword(s):  
Gonadal Development ◽  
Total Weight ◽  
Individual Animal ◽  
Blood Samples ◽  
Male And Female ◽  
Gonadal Maturation ◽  
Leukocyte Counts ◽  
The Mean ◽  
Immature Cells

From August, 1996 to December, 1997, 293 of ''dourado'' specimens, Salminus maxillosus (Valencienes, 1840), of various sizes, were caught in Mogi-Guaçu River, Emas Falls, for hematologic studies. Total weight (Wt in g) and length (Lt in cm) were taken for each individual animal. Smears were prepared from blood samples and utilized for differential leukocyte counts (lymphocytes, neutrophils, monocytes, eosinophils, special granulocytic cell and immature cells). The mean percentages of leukocytes were determined according to sex and stage of gonadal maturation (immature, in maturation, mature, spent and resting). Significant differences between male and female occurred only for the special granulocytic cell. In analyzing the leukocyte profile during gonadal development, only female showed significant differences in mean percentages of lymphocytes, neutrophils, monocytes and eosinophils.

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