Comparative allometric growth of rare minnow (Gobiocypris rarus) in two culture environments

Su, Liu; Luo, Shunlong; Qiu, Ning; Xu, Chen; Hou, Min; Xiong, Xia; Wang, Jianwei

doi:10.1007/s10750-020-04232-y

Cited by 7 publications

(7 citation statements)

References 23 publications

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“…If an animal’s growth is significantly affected by adverse conditions, then its welfare could deteriorate significantly [ 40 ]. Previous studies have shown that the factors affecting the growth of rare minnows include nutrients [ 41 , 42 ], water temperature [ 43 ] and other physical and chemical characteristics of their water environment, feeding, and other culturing strategies [ 43 , 44 , 45 ]. Therefore, these impact factors are restricted or controlled in the standard drafts of rare minnows to ensure their basic welfare.…”

Section: Discussionmentioning

confidence: 99%

The Effect of Environmental Enrichment on Laboratory Rare Minnows (Gobiocypris rarus): Growth, Physiology, and Behavior

Hou

et al. 2022

Animals

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Environmental enrichment is a method to increase environmental heterogeneity, which may reduce stress and improve animal welfare. Previous studies have shown that environmental enrichment can increase the growth rate, decrease aggressive and anxiety-like behaviors, improve learning ability and agility, and reduce cortisol levels in animals. These effects usually differ between species. Unfortunately, habitat enrichment on laboratory fish is poorly studied and seldom adopted in care guidance. Rare minnows (Gobiocypris rarus) have been cultured as a native laboratory fish in China in barren banks without environmental enrichment since 1990; they have been widely used in studies on ecotoxicology, environmental science, and other topics. The purpose of this study was to investigate the effect of environment enrichment on the growth, physiological status, and anxiety-like behavior of laboratory rare minnows. We observed and analyzed SGR, cortisol levels, DA, DOPAC, 5-HT and 5-HIAA, and anxiety-like behavior indexes after one month of treatment in barren (control) and enrichment tanks. We found that there were no significant differences in SGR, anxiety-like behavior, DA, DOPAC, or 5-HIAA levels between the two treatments. However, higher cortisol and 5-HT levels were observed in the enrichment tanks. This study suggests that rare minnows might be influenced by their living environment, and future related studies should consider their environmental enrichment.

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Section: Discussionmentioning

confidence: 99%

The Effect of Environmental Enrichment on Laboratory Rare Minnows (Gobiocypris rarus): Growth, Physiology, and Behavior

Hou

et al. 2022

Animals

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“…This suggests that accumulation of Cd in the gonads of rare minnow causes no-spawning activities. The fullness of yolk granules is a prerequisite for oocyte maturation, which determines the spawning cycle of the parent fish species to some extent (Su et al, 2020). The histological data showed that Cd exposure resulted in absorbed yolk granules in the present study, which may explain why most of the spawning events in the Cd exposure group occurred in 6-10 days or over 10 days.…”

Section: Discussionmentioning

confidence: 46%

“…The parent fish were removed to a new tank to ensure separation from the eggs. Based on the results of Su et al (2020), resuming spawning rhythm was defined as a second consecutive inter-spawning interval within 5 days. The next day, the eggs were siphoned into 600 mL cylindrical glass containers [12 cm (diameter); Huaou Industry, Yancheng, China] for collection and parental fish were returned to the original tank for further observation.…”

Section: Spawningper Formancementioning

confidence: 99%

“…Compared with the control group, the mean time for first spawning in the 28 days Cd exposure groups significantly increased (Table 2, p < 0.05). According to Su et al's (2020) criteria for resuming spawning rhythm, all paired rare minnows in the control group spawned within 5 days. However, only four and two pairs of rare minnows in 5 and 10 μg/L Cd exposure resumed the spawning rhythm (Figure 2B).…”

Section: Effect Of Cadmium Exposure On the Spawning Activity Of Paren...mentioning

confidence: 99%

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Effects of cadmium exposure during the breeding period on development and reproductive functions in rare minnow (Gobiocypris rarus)

Qiu

et al. 2023

Front. Physiol.

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Cadmium is a common reproductive toxin in aquatic systems. Cd exposure of fish species at high concentrations can severely affect the reproductive function of fish. However, the underlying toxicity of cadmium exposure at low concentrations on the reproductive function in parental fish remains unclear. To investigate the impacts of cadmium exposure on reproductive capability, eighty-one male and eighty-one female rare minnows (Gobiocypris rarus) were exposed to cadmium at 0 (control group), 5 and 10 μg/L for 28 days, and then transferred into clean water to pair spawn. The results showed that cadmium exposure at 5 or 10 μg/L for 28 days in rare minnows could reduce the success rates of pair spawning in parent rare minnows, lessen no-spawning activities, and prolong the time for first spawning. Furthermore, the mean egg production of the cadmium exposure group increased. The fertility rate of the control group was significantly higher than that of the 5 μg/L cadmium exposure group. Anatomical and histological data further revealed that the intensity of atretic vitellogenic follicles significantly increased and spermatozoa vacuolated after cadmium exposure (p < 0.05), but slightly increased the condition factor (CF), and relatively stable gonadosomatic index (GSI) values were also observed in the cadmium exposure groups. These observed results indicated that cadmium exposure at 5 or 10 μg/L affected the reproductive activity of paired rare minnow by accumulating Cd in the gonads, and the effect diminished over time. The reproductive risk of low-dose cadmium exposure to fish species remains a cause for concern.

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“…These standards for conventional (CV) and SPF rare minnow consist of ve parts, including microbiological standards and monitoring, parasitological standards, genetic quality control, nutrition and food, and water environment and facilities standards. Preliminary reports have con rmed that these standards are rigorous, and declared them to be the local standard in Hubei Province for establishing and cultivating SPF rare minnows (Su et al 2020). Research on the species' hematology and serum biochemistry is limited to the CV individuals reported by Shao et al (2006), and these parameters of SPF rare minnow have not yet been reported.…”

Section: Introductionmentioning

confidence: 99%

Hematologic and serum biochemical characteristics of rare minnow (Gobiocypris rarus) in two different culture environments

Qiu

Hou

et al. 2022

Preprint

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Hematological and serum biochemical parameters are essential for the evaluation of both structural and function status of fish species due to the involvement of culture environment and sex. To obtain a basic knowledge about the variation in hematological and serum biochemical parameters of conventional (CV) and specific pathogen-free (SPF) rare minnow (Gobiocypris rarus) with respect to sex, blood samples collected from 720 healthy and adult rare minnow (♀:♂=1:1) are analyzed by using standard methods and techniques. The results indicated that hemoglobin (Hb), hematocrit (HCT) and mean corpuscular volume (MCV) values in female CV rare minnow were 82.4 ± 9.5 g/L, 41.6 ± 8.4%, 408.3 ± 81.6 fl, which were significantly lower than those in SPF rare minnow (p < 0.05). Alkaline phosphatase (ALP) differed significantly between these two cultured rare minnows (p < 0.05), and no significant differences were observed in other serum biochemical parameters (p > 0.05). In addition, MCV values of female rare minnow are significantly higher than male individuals (p > 0.05). These data demonstrated that hematological and serum biochemical parameters of rare minnow were affected by culture environment and sex, and that a clean culture environment could contribute to the health physiological status of rare minnow.

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Comparative allometric growth of rare minnow (Gobiocypris rarus) in two culture environments

Cited by 7 publications

References 23 publications

The Effect of Environmental Enrichment on Laboratory Rare Minnows (Gobiocypris rarus): Growth, Physiology, and Behavior

The Effect of Environmental Enrichment on Laboratory Rare Minnows (Gobiocypris rarus): Growth, Physiology, and Behavior

Effects of cadmium exposure during the breeding period on development and reproductive functions in rare minnow (Gobiocypris rarus)

Hematologic and serum biochemical characteristics of rare minnow (Gobiocypris rarus) in two different culture environments

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