Identifying major events in two sturgeons’ life using pectoral fin spine ring structure: exploring the use of a non-destructive method

Bakhshalizadeh, Shima; Bani, Aïda; Abdolmalaki, Shahram; Moltschaniwskyj, Natalie A.

doi:10.1007/s11356-017-9493-4

Cited by 9 publications

(3 citation statements)

References 37 publications

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“…Early maturation has also been reported in females of other sturgeon species (9 years for female Indian Sturgeon A. persicus and 7 years for Starry Sturgeon A. stellatus ; Bakhshalizadeh et al. ).…”

Section: Discussionmentioning

confidence: 62%

Tracking Stocking Success in a Long‐Lived Species through Genetics and Demographics: Evidence of Natural Reproduction in Lake Sturgeon after Twenty‐Two Years

et al. 2020

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Lake Sturgeon Acipenser fulvescens populations throughout the Great Lakes have experienced declines. Therefore, Lake Sturgeon have been stocked at several locations, including the Oswegatchie River in New York State, where Lake Sturgeon are listed as threatened. The goal of New York's Lake Sturgeon stocking program has been the establishment of self-sustaining populations in six out of the seven management units in order to meet delisting criteria. Due to Lake Sturgeon's long lifespan and late sexual maturity, there is a significant delay before it can be determined whether natural reproduction is occurring at the reintroduction site. Our objective was to determine whether recently captured Lake Sturgeon from the Oswegatchie River were of hatchery origin and whether natural reproduction was occurring in the river. Age data and genetic data from 12 microsatellite loci were collected from 38 individuals from the Oswegatchie River. The genetic data were used to reconstruct families by using COLONY and STRUCTURE statistical analysis programs. The genetic diversity of the Oswegatchie River population was also compared with other natural and introduced Lake Sturgeon populations in the region. The combination of family reconstruction and age data indicated that natural reproduction is occurring in the Oswegatchie River. Individuals that were presumed to be recruited had ages ranging from 6 to 12 years. It is often thought female Lake Sturgeon typically do not reach sexual maturity until about 20 years of age. Only 12-15 years had elapsed since the earliest times of stocking, suggesting the possibility that remnant native females remained in the system or stocked female Lake Sturgeon have reached early sexual maturity. The genetic diversity of the Lake Sturgeon population in the Oswegatchie River is comparable to that of other nearby natural populations. However, the effective population size (N e ) was lower than that of many natural populations. As natural reproduction continues in the Oswegatchie River, N e will likely increase.

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Section: Discussionmentioning

confidence: 62%

Tracking Stocking Success in a Long‐Lived Species through Genetics and Demographics: Evidence of Natural Reproduction in Lake Sturgeon after Twenty‐Two Years

et al. 2020

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“…It is also likely that growth rates resulting in unreliable ages may coincide with important life history events (e.g., maturation) that may affect annulus formation (Bakhshalizadeh et al. ). The current study included individuals of unknown sex and maturation status.…”

Section: Discussionmentioning

confidence: 99%

Mark–Recapture Validation of Pectoral Fin Ray Age Estimation for Lake Sturgeon

Hessenauer

Utrup

Briggs

et al. 2018

N American J Fish Manag

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Age estimation is an integral part of fisheries management and is critical for evaluations of growth, mortality, and recruitment. Validation of ages obtained from age estimation of hard parts is a necessary part of the aging process because understanding the magnitude of error and bias associated with structure interpretation provides context for managers using the data. However, validation studies on large-bodied and long-lived species, such as Lake Sturgeon Acipenser fulvescens, are challenging. We utilized a 20year mark-recapture dataset from Lake St. Clair and the St. Clair River, Michigan, to validate pectoral fin ray age estimates from 51 individuals that were sampled twice, with 2 to 17 years between capture-recapture events. Samples were divided into four quartiles based on mean annual growth rates during their time at large (mean growth for quartiles = 0.6 cm/year, 2.1 cm/year, 3.7 cm/year, and 5.1 cm/year). Age error was defined as the difference between the estimated age of the fish at first and second capture and the number of years at large. No difference in time at large existed among the four groups, but age error differed among the four groups. Additionally, age error did not differ from zero for the two fastest-growing quartiles but did differ significantly from zero for the two slowest-growing quartiles. We conclude that for Lake Sturgeon growing faster than 3 cm/year (generally less than 100 cm TL) pectoral fin rays provide valid age estimates. Managers should evaluate the growth rates of Lake Sturgeon in their populations to determine a size threshold for using fin rays for age determination.Age estimation is an integral part of fishery management and is critical for evaluations of growth, mortality, and recruitment, which in turn are indicators of population and environmental conditions (Kerns and Lombardi-Carlson 2017). In temperate climates, age is frequently estimated from external hard parts, such as scales, spines, and fin rays. These parts offer several advantages in that they are easily accessed and may be nonlethally collected from individuals.

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“…1d–j ). These skeletal elements preserve unaltered growth records from embryonic development up to death, making them highly suitable for life history reconstructions 15 , 16 .…”

Section: Mainmentioning

confidence: 99%

The Mesozoic terminated in boreal spring

During

Smit

Voeten

et al. 2022

Nature

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The Cretaceous–Palaeogene mass extinction around 66 million years ago was triggered by the Chicxulub asteroid impact on the present-day Yucatán Peninsula1,2. This event caused the highly selective extinction that eliminated about 76% of species3,4, including all non-avian dinosaurs, pterosaurs, ammonites, rudists and most marine reptiles. The timing of the impact and its aftermath have been studied mainly on millennial timescales, leaving the season of the impact unconstrained. Here, by studying fishes that died on the day the Mesozoic era ended, we demonstrate that the impact that caused the Cretaceous–Palaeogene mass extinction took place during boreal spring. Osteohistology together with stable isotope records of exceptionally preserved perichondral and dermal bones in acipenseriform fishes from the Tanis impact-induced seiche deposits5 reveal annual cyclicity across the final years of the Cretaceous period. Annual life cycles, including seasonal timing and duration of reproduction, feeding, hibernation and aestivation, vary strongly across latest Cretaceous biotic clades. We postulate that the timing of the Chicxulub impact in boreal spring and austral autumn was a major influence on selective biotic survival across the Cretaceous–Palaeogene boundary.

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Identifying major events in two sturgeons’ life using pectoral fin spine ring structure: exploring the use of a non-destructive method

Cited by 9 publications

References 37 publications

Tracking Stocking Success in a Long‐Lived Species through Genetics and Demographics: Evidence of Natural Reproduction in Lake Sturgeon after Twenty‐Two Years

Tracking Stocking Success in a Long‐Lived Species through Genetics and Demographics: Evidence of Natural Reproduction in Lake Sturgeon after Twenty‐Two Years

Mark–Recapture Validation of Pectoral Fin Ray Age Estimation for Lake Sturgeon

The Mesozoic terminated in boreal spring

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