Hormonal regulation of follicular atresia in teleost fish

Habibi, Hamid R.; Andreu-Vieyra, Claudia

doi:10.1007/978-1-4020-6235-3_9

Cited by 15 publications

(13 citation statements)

References 115 publications

(135 reference statements)

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“…However, studies conducted on pikeperch showed that both of these hormones are present throughout the vitellogenesis and maturation, suggesting a rather complex endocrine pathway in this species (Hermelink et al 2011(Hermelink et al , 2017. The action of GnRHs is not restricted to the pituitary, since they also regulate follicular development on the gonadal level (Habibi and Andreu-Vieyra 2007). In the case of pre-season reproduction, it can be assumed that although certainly present, the level of internal LH is not sufficient to induce FOM itself.…”

Section: Discussionmentioning

confidence: 99%

“…As stated above, GnRHs affect the mid of the HPG axis, thus triggering the pituitary secretion. Consequently, the pituitary secretes both FSH and LH (Habibi and Andreu-Vieyra 2007). In fish generally, FSH is considered as the dominant GtH secreted during the vitellogenesis, while LH is prevalent during the maturation phase of oogenesis (Rosenfeld et al 2007).…”

Section: Discussionmentioning

confidence: 99%

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The effect of hormonal preparation (gonadotropins vs. gonadoliberins) on pre-seasonally obtained eggs and larvae quality in pikeperch (Sander lucioperca L.)

et al. 2019

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Although several papers were dealing with intensively reared broodstocks, most of the published artificial reproduction protocols were applied in wild pikeperch breeders. Therefore, we aimed to evaluate the effects of ovulation induction agents, namely human chorionic gonadotropin (hCG) and salmon gonadotropin-releasing hormone analogue (sGnRHa) on the reproductive performance in pre-seasonal artificial propagation of cultured pikeperch. Breeders were harvested from an outdoor in-pond circulation system in mid-September and transferred to indoor facility in late January, conditioned and injected with either 50 μg kg −1 of sGnRHa or 500 IU kg −1 of hCG, with six females in each hormonal group. Stripped eggs from each female were sampled for chemical composition analysis, fertilised with the milt of two males, incubated and obtained larvae were further reared. No significant differences were noticed between the treatments in any of the analysed parameters of embryo survival nor larviculture performance. Rather high differences in intragroup variation were seen between the treatments, expressed in several-fold higher coefficients of variation in embryo survival in experimental and commercial conditions in the hCG group. Eggs obtained from females treated with hCG had a significantly higher lipid content (31.1% ± 2.0%) compared to sGnRHa-treated females (27.4% ± 1.8%). Fatty acid profiles of the eggs revealed differences in total n − 6 and linoleic acid 18:2n − 6 content while n − 3/n − 6 was significantly lower in the hCG group. Gonadoliberins reduced the variability in the spawning outcome. It appears that hormones can modify the eggs' fat content during the pre-season artificial reproduction.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

The effect of hormonal preparation (gonadotropins vs. gonadoliberins) on pre-seasonally obtained eggs and larvae quality in pikeperch (Sander lucioperca L.)

et al. 2019

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“…In teleost fish as well as in mammals, hormones trigger the initiation of atresia (Habibi and Andreu‐Vieyra, ). Although the triggers for this degenerative process in elasmobranchs remain unknown, it is likely to be mediated by the neuroimmunoendocrine system, which is formed by the communication between the neuroendocrine and immune systems.…”

Section: Case Studymentioning

confidence: 99%

A review on the morphology of ovarian follicles in elasmobranchs: A case study inRhizoprionodon taylori

Waltrick

Simpfendorfer

Awruch

2017

Journal of Morphology

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The identification of the elasmobranch secondary ovarian follicles and their function can be challenging and the inconsistent use of terminology derived from other taxa is a matter of ongoing debate. In this study, the available information on the histology of the elasmobranch secondary ovarian follicles derived from atresia (preovulatory follicles) or ovulation (postovulatory follicles) is reviewed highlighting their morphology and steroidogenic capacity. Based on this literature review, the ovarian follicles of the Australian sharpnose shark Rhizoprionodon taylori were classified according to their preovulatory or postovulatory origin. Two types of secondary follicles originating from atresia of developing follicles (atretic previtellogenic follicles) and ripe follicles (atretic vitellogenic follicles), and one type of postovulatory follicle were identified throughout the reproductive year of this species. Morphological similarities of the elasmobranch secondary ovarian follicles and their variations in different species denote the difficulty to classify them. Given the multiple origins of ovarian follicles, their poorly understood functions and capacity to supply steroids, visual identification of these structures and the use of terminology derived from mammalian and other vertebrate studies (with the exception of the corpora lutea as a temporary endocrine gland) is not advisable. J. Morphol. 278:486-499, 2017. © 2017 Wiley Periodicals, Inc.

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“…The maturation process of oocytes to become viable ova is regulated by LH in two stages (Patino et al 2001). Oocyte maturation competence (OMC) is a term that many authors have used to describe a late stage of development whereby the oocyte is released from meiotic arrest (Patino et al 2001;Habibi and Andreu-Vieyra 2007). In the initial prolonged oocyte growth phase, Vtg is being sequestered in the oocytes as the follicle is developing the ability to produce maturation initiation hormone (MIH).…”

Section: Female Reproduction Implicationsmentioning

confidence: 99%

“…Delays in oocyte maturation would also result in increased atresia of ova that persist in the ovary as the water temperature window for the spawning season closes (Thomas 1999;Habibi and Andreu-Vieyra 2007). Exposure to PCBs has been implicated in increased oocyte atresia in many studies Hogan and Brauhn 1975;Zitko and Saunders 1979;Weis and Weis 1982;Niimi 1983;Monod 1985;Mac and Edsall 1991;Mac et al 1993;Stouthart et al 1998, Daouk et al 2011.…”

Section: Female Reproduction Implicationsmentioning

confidence: 99%

Fish, Polychlorinated Biphenyls (PCBs) and Natural Resource Injury

Sparks¹

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Fish, Polychlorinated Biphenyls (PCBs) and Natural Resource Injury Daniel W. Sparks The Natural Resource Damage Assessment (NRDA) program is authorized by the Comprehensive Environmental Response Compensation and Liability Act (CERCLA) and the Oil Pollution Act (OPA) to pursue compensation for injury to, or destruction and loss of, natural resources. Fish are an important "natural resource" present in almost all aquatic ecosystems. Polychlorinated biphenyls (PCBs) are a hazardous substance and have been shown to cause harm to fish (and fish-eating animals). A series of investigations were conducted to determine if "injury" had occurred to creek chub (Semotilus atromaculatus) and in one study, the fish community that creek chubs were a part of, at several PCB-contaminated study locations. We examined: hepatic condition and oxidative stress enzymes; a comprehensive look at reproductive condition; age and growth; and several metrics of fish community structure and function. Although the determination of hepatic oxidative stress is a response to PCBs, this in and of itself is not considered injury. However, it is a good biomarker of potential injury especially in the presence of other injuries, like reproductive failure. Consistent with the PCB toxicity literature, we consider hepatomegaly and lipidosis injuries that result from PCB exposure. Given that other common factors can also cause lipidosis, this is not an effective injury assessment tool. The age and growth analysis shows significantly reduced survivorship in females at the PCB sites; this is clearly an injury. Aspects of creek chub reproduction have also been adversely impacted: reduced vitellogenin (Vtg), altered sex steroid ratios, reduced fecundity, delayed/ impaired spawning of ova, and reduced / impaired testes maturation. Although not an injury per se, the reduced and seasonally altered pattern of the male secondary sex characteristic nuptial tubercles provides another line of evidence that neuroendocrine disruption is occurring at the PCB-contaminated stream sites. An assessment of the fish community at these PCB-contaminated streams also indicated that growth and survival were issues for the entire fish community. From Frye's standard of evidence [Frye v. United States, 293 F.1013 (D.C. Cir. 1923)], much of this work would have been extremely useful to trustees in court. What we found would be "generally acceptable" in our professional sphere. But scientists and lawyers look at facts differently: same language, same word, different meaning. The science of reproduction impacts is very complicated, and some aspects (i.e. neuroendocrine disruption) while clearly injury, are too complicated to prevail in the courtroom. The impacts to reproduction, including reduced vitellogenin (Vtg), reduced fecundity and delayed/ impaired spawning of ova have significant ecosystem consequences. Growth effects that follow a non-monotonic non-standard dose response curve would do poorly in court. While reduced survivorship should easily be translated to the injury known...

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Hormonal regulation of follicular atresia in teleost fish

Cited by 15 publications

References 115 publications

The effect of hormonal preparation (gonadotropins vs. gonadoliberins) on pre-seasonally obtained eggs and larvae quality in pikeperch (Sander lucioperca L.)

The effect of hormonal preparation (gonadotropins vs. gonadoliberins) on pre-seasonally obtained eggs and larvae quality in pikeperch (Sander lucioperca L.)

A review on the morphology of ovarian follicles in elasmobranchs: A case study inRhizoprionodon taylori

Fish, Polychlorinated Biphenyls (PCBs) and Natural Resource Injury

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