Intra-pituitary relationship of follicle stimulating hormone and luteinizing hormone during pubertal development in Atlantic bluefin tuna (Thunnus thynnus)

N, Berkovich; Corriero, Aldo; Santamaría, N.; Mylonas, Constantinos C.; Vassallo-Aguis, R.; Gándara, Fernando de la; Meiri-Ashkenazi, I.; Zlatnikov, Vered; Gordin, H.; Bridges, C.R.; Rosenfeld, Hanna

doi:10.1016/j.ygcen.2013.08.005

Cited by 15 publications

(14 citation statements)

References 93 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…S2). This supports differential synthesis and accumulation kinetics for pituitary LH and FSH32374344. The high pituitary LH levels recorded in this study are typical of ABFT and may compensate for high volume dilution after being secreted into the blood circulation of such a large fish17.…”

Section: Discussionsupporting

confidence: 79%

“…Mean pituitary LH levels (Supplementary Fig. S1) are similar to ABFT sampled in the Mediterranean Sea1737 and are an order of magnitude higher than those of pituitary FSH (Supplementary Fig. S2).…”

Section: Discussionmentioning

confidence: 62%

“…4). Since FSH is the dominant GtH in immature fish5, immature individuals should have FSH/LH ratio higher than 1.0, as demonstrated in ABFT sampled in the Mediterranean Sea37. Indeed, all YOY analyzed had GtHs ratios >2.0.…”

Section: Discussionmentioning

confidence: 74%

“…. FSH/LH levels and ratios have been measured in mature and immature captive ABFT37. In the latter, a FSH/LH ratio greater than 1.0 was confirmed and comparable to mammals3839.…”

mentioning

confidence: 74%

See 3 more Smart Citations

Sexual maturity in western Atlantic bluefin tuna

Heinisch

Rosenfeld

Knapp

et al. 2014

Sci Rep

Self Cite

View full text Add to dashboard Cite

We introduce a novel endocrine approach for assessing the unresolved matter of the timing of sexual maturation in western Atlantic bluefin tuna (ABFT), a highly migratory population whose status remains uncertain. Ratios of follicle stimulating hormone to luteinizing hormone, a sexual maturity indicator, in all ABFT ≥134 cm curved fork length (CFL) were <0.4, similar to Mediterranean spawners, indicating that western ABFT mature at considerably smaller sizes and at a much younger age than currently assumed (≥185 cm CFL).

show abstract

Section: Discussionsupporting

confidence: 79%

Section: Discussionmentioning

confidence: 62%

Section: Discussionmentioning

confidence: 74%

“…. FSH/LH levels and ratios have been measured in mature and immature captive ABFT37. In the latter, a FSH/LH ratio greater than 1.0 was confirmed and comparable to mammals3839.…”

mentioning

confidence: 74%

See 2 more Smart Citations

Sexual maturity in western Atlantic bluefin tuna

Heinisch

Rosenfeld

Knapp

et al. 2014

Sci Rep

Self Cite

View full text Add to dashboard Cite

show abstract

“…In order to fully understand the reproductive dynamics of the western spawning stock, the maturity ogive should be revised using comprehensive size sampling over larger temporal scales including histological examination of the ovaries and endocrine profiling. New studies utilizing endocrine hormones developed and calibrated in captive eastern ABFT [37] indicate that western ABFT become sexually mature at less than 8 y [38].…”

Section: Discussionmentioning

confidence: 99%

Comparative Assessment of the Reproductive Status of Female Atlantic Bluefin Tuna from the Gulf of Mexico and the Mediterranean Sea

et al. 2014

View full text Add to dashboard Cite

Despite attention focused on the population status and rebuilding trajectory of Atlantic bluefin tuna (Thunnus thynnus), the reproduction and spawning biology remains poorly understood, especially in the NW Atlantic. At present, the eastern and western spawning populations are believed to exhibit different reproductive characteristics and, consequently, stock productivity. However, our study suggests that the two spawning populations, the Gulf of Mexico and the Mediterranean Sea, could show similar reproductive features and spawning strategies. Between 2007 and 2009, gonad samples from female Atlantic bluefin tuna were collected in the northern Gulf of Mexico (n = 147) and in the western Mediterranean Sea (n = 40). The histological and stereological analysis confirmed that sampled eastern and western bluefin tuna exhibit the same spawning duration (three months) but the spawning in the Gulf of Mexico begins one month earlier than in the Mediterranean Sea. Western bluefin tuna caught in the peak of the spawning season (May) showed a similar spawning frequency (60%) to the spawning peak observed in the Mediterranean Sea (June). Fecundity for the Gulf of Mexico fish () was lower but not significantly different than for fish sampled in the Mediterranean Sea (). Our study represents the first comparative histological analysis of the eastern and western spawning stocks whose findings, combined with new determinations of size/age at maturity and possible alternative spawning areas, might suggest basic life history attributes warrant further scientific and management attention.

show abstract

Maturity assignment based on histology‐validated macroscopic criteria: Tackling the stock decline of the Mediterranean swordfish (Xiphias gladius)

Marisaldi

Basili

Candelma

et al. 2019

Aquatic Conservation

View full text Add to dashboard Cite

Effective stock assessment relies on the evaluation of the reproductive potential of a population, but this is often achieved using fast, inexpensive, and inaccurate macroscopic indicators of gonadal maturity. Indeed, this approach suffers from high error rates as a result of misclassification and operator errors. Although histology is considered the gold standard to assign reproductive stages, it represents a time‐consuming and expensive method. Therefore, cost‐effective approaches are currently needed to assess the species‐specific reproductive potential and define the correct size at first maturity (L50). In the present study a histology‐calibrated method based on the gonadal index (GI) was developed to assign maturity stages to the overfished Mediterranean swordfish (Xiphias gladius), supported by histological classification of gonadal development, an estimation of L50, and an analysis of the reproductive output of this species. The performance of this new method had an overall agreement of 90% with histological data, and the L50 calculated by the GI‐based method compared with histology analysis was not statistically different (p > 0.05). Moreover, in order to apply this method without bias, a thorough validation of the relationship between length and gonad weight was carried out and the suitability of the GI to compare individuals of different size and maturity stages was confirmed. The present findings provide a comprehensive picture of the patterns characterizing Mediterranean swordfish reproduction and a promising method to assign maturity stages based on a macroscopic indicator. This method has the potential to be extensively applied during routine fish sampling activities in the field because of its simple requirements.

show abstract

Intra-pituitary relationship of follicle stimulating hormone and luteinizing hormone during pubertal development in Atlantic bluefin tuna (Thunnus thynnus)

Cited by 15 publications

References 93 publications

Sexual maturity in western Atlantic bluefin tuna

Sexual maturity in western Atlantic bluefin tuna

Comparative Assessment of the Reproductive Status of Female Atlantic Bluefin Tuna from the Gulf of Mexico and the Mediterranean Sea

Maturity assignment based on histology‐validated macroscopic criteria: Tackling the stock decline of the Mediterranean swordfish (Xiphias gladius)

Contact Info

Product

Resources

About