Seasonal changes and endocrine regulation of pejerrey (Odontesthes bonariensis) spermatogenesis in the wild

Elisio, Mariano; Chalde, Tomás; Miranda, Leandro Andrés

doi:10.1016/j.ygcen.2015.01.011

Cited by 24 publications

(24 citation statements)

References 56 publications

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“…Larvae were kept at 16·8 ± 0·4 ∘ C (mean ± s.d. ), similar to the water temperature during the main hatched period in the wild (Elisio et al, , 2015. Water temperature was recorded every hour using waterproof electronic data-loggers (www.ibuttonlink.com).…”

Section: E X P E R I M E N Ta L D E S I G N a N D A N I M A L S A M Pmentioning

confidence: 99%

Pituitary–thyroid axis development during the larval–juvenile transition in the pejerrey Odontesthes bonariensis

Chalde

Miranda

2017

Journal of Fish Biology

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The morphological development of the thyroid gland of pejerrey Odontesthes bonariensis during larval-juvenile transition was studied and related to whole-body concentrations of thyroxine (T ) and tri-iodothyronine (T ). A complementary (c)DNA fragment of the thyroid-stimulating hormone β-subunit (tshb) was sequenced and transcript levels quantified during this period. Follicles with eosinophilic and T -immunoreactive colloids were detected at hatching together with tshb transcript levels and whole-body concentrations of T and T hormones. Thyroid follicles were located in the subpharyngeal region associated with the ventral aorta below the hyoid bone. Follicle structure switched from the rounded form at hatching to oval in juveniles. Significant increase of follicle number per larva, mean colloidal area and total colloidal area was observed throughout development with maximum values at the end of the larval-juvenile transition. A significant decrease of tshb expression together with a significant increase in T and T whole-body concentrations was observed prior to achieving the juvenile phenotype. These results are in accordance with a negative feedback regulation of tshb expression by thyroid hormones and a possible association between thyroid hormone levels and the acceleration of metabolic processes necessary to complete metamorphosis.

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Section: E X P E R I M E N Ta L D E S I G N a N D A N I M A L S A M Pmentioning

confidence: 99%

Pituitary–thyroid axis development during the larval–juvenile transition in the pejerrey Odontesthes bonariensis

Chalde

Miranda

2017

Journal of Fish Biology

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“…The plasma levels of oestradiol (E 2 ) in females and 11‐ketotestosterone (11‐KT) in males were measured by an enzyme‐linked immunosorbent assay (ELISA) using commercial kits, following the manufacturer´s protocols (Cayman Chemicals). These kits were validated previously in pejerrey (Elisio et al, ; Elisio, Chalde, et al, ). Serum samples were extracted with diethyl ether and suspended in their initial volume with ELISA buffer.…”

Section: Methodsmentioning

confidence: 99%

“…This fish inhabits shallow lakes, which are characterized by high thermal fluctuation and not having stable thermal stratification (Elisio, Vitale, & Miranda, ). The pejerrey is a multiple spawner releasing successive egg batches from late winter to late spring, and even during late summer and early autumn if the environmental conditions are permissive (Calvo & Morriconi, ; Elisio Chalde, & Miranda, , ). Both the start and the end of spawning periods are highly regulated by temperature.…”

Section: Introductionmentioning

confidence: 99%

“…Both the start and the end of spawning periods are highly regulated by temperature. For instance, high water temperature during winter may produce an advancement of the onset of the reproductive season, while high temperatures during summer or autumn may impair the reproduction and shortened the spawning season (Elisio, Chalde, et al, ; Miranda, Chalde, Elisio, & Strüssmann, ).…”

Section: Introductionmentioning

confidence: 99%

“…Many studies were performed related to reproductive physiology of pejerrey in the wild (Elisio, Chalde, & Miranda, ; Elisio, Chalde, et al, ), and in captivity (Chalde, Gárriz, Sanches, & Miranda, ; Elisio, Chalde, & Miranda, ; Miranda, Strüssmann, Guilgur, Strobl‐Mazzulla, & Somoza, ; Miranda, Strüssmann, & Somoza, ; Somoza, Miranda, Guilgur, & Strobl‐Mazzulla, ) analysing the brain‐pituitary‐gonad axis function at molecular, endocrinological and histological level, providing valuable information for the management of broodstock. In this sense, several strategies have been performed for intensive‐breeding development in captivity for aquaculture production, manipulating temperature, photoperiod and hormonal treatments (Chalde, Fernández, Cussac, & Somoza, ; Miranda, Berasain, Velasco, Shirojo, & Somoza, ; Miranda, Cassará, & Somoza, ; Miranda & Somoza, ).…”

Section: Introductionmentioning

confidence: 99%

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Characterization of the quality of the gametes and sex steroid levels during spring and summer spawning events in pejerrey Odontesthes bonariensis reared under natural conditions of temperature and photoperiod

Chalde

Miranda

2020

Aquac Res

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Pejerrey Odontesthes bonariensis spawning period takes place during the end of winter and spring and, depending on temperature conditions, during late summer and autumn. Nevertheless, the occurrence and quality of the summer–autumn spawning period have not been well documented and are not considered for aquaculture production. In this context, this study aimed to characterize the reproductive activity of pejerrey reared in captivity under natural conditions of temperature and photoperiod throughout a year in order to summarize the spawning quality of the two spawning periods. The present results showed that pejerrey might spawn from late winter to the end of the spring with a peak in October (mid‐spring) and, also during summer and early autumn, interrupted by a period of 56 days without spawning activity in between. The extension of both spawning periods was almost equal (67 and 69 days). Nevertheless, higher relative fecundity and larger egg size were observed during the first spawning period, associated with higher levels of oestradiol measured in females demonstrating that it is better than the second spawning. The fertilization rate was not affected throughout the reproductive periods. These differences in the reproductive parameters are discussed in order to design specific strategies to increase seed production.

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Effect of Seasonality for Optimization of Germ Cell Extraction from Mature Blue Catfish

et al. 2023

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Xenogenesis is an innovative tool for hybrid catfish (female Channel Catfish Ictalurus punctatus × male Blue Catfish I. furcatus) seed production, accomplished by transplanting undifferentiated germ cells derived from a donor diploid fish into a sterile recipient, which then enables recipient fish to produce donor‐derived gametes. There is potential to collect donor‐derived germ cells from mature fish during certain times of the year depending upon seasonal temperature and serum sex steroid hormonal fluctuations. The objective of this study was to evaluate seasonal variations in germ cell counts and serum sex steroid hormonal profiles in mature Blue Catfish. Mature fish were collected monthly over the full annual cycle to quantify the number of live germ cells (spermatogonia A, oogonia), viability of germ cells, and levels of serum sex steroid hormones, including testosterone, 11‐ketotestosterone, and 17β estradiol. Extracted spermatogonia A counts were highest from April to June, whereas a significant decline was detected from July to November. Extracted live oogonia counts were highest in April and gradually decreased to zero over the months of May to August. Seasonal variations in serum testosterone, 11‐ketotestosterone, and 17β estradiol followed a similar pattern as the live spermatogonia A and oogonia counts. Even though spermatogonia A counts were relatively lower in mature than in immature Blue Catfish males, extracting spermatogonia A from mature Blue Catfish males during April to June provides an added advantage to the process of artificial fertilization, as it is required to sacrifice these fish to collect sperm.

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Seasonal changes and endocrine regulation of pejerrey (Odontesthes bonariensis) spermatogenesis in the wild

Cited by 24 publications

References 56 publications

Pituitary–thyroid axis development during the larval–juvenile transition in the pejerrey Odontesthes bonariensis

Pituitary–thyroid axis development during the larval–juvenile transition in the pejerrey Odontesthes bonariensis

Characterization of the quality of the gametes and sex steroid levels during spring and summer spawning events in pejerrey Odontesthes bonariensis reared under natural conditions of temperature and photoperiod

Effect of Seasonality for Optimization of Germ Cell Extraction from Mature Blue Catfish

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