Comparative analysis of multiple paternity in different populations of viviparous black rockfish, Sebastes schlegelii, a fish with long-term female sperm storage

Fish often undergo food shortages in nature, especially for juveniles that are relatively vulnerable in most aspects. Therefore, the effects of food deprivation on fish behavior and physiology are worth exploring. Here, we investigated the behavioral and metabolic adaptations of the juvenile black rockfish Sebastes schlegelii to different durations of food deprivation. In this study, three treatments were set: control group, short-term food deprivation (STFD) group, and long-term food deprivation (LTFD) group. The rearing lasted for six weeks. During this period, videos were recorded three times per week to assess the locomotor activity and aggression. After this, the fishes’ boldness, neophobia, and aggressiveness were assessed using different behavioral assessment devices, while the standard metabolic rate (SMR) was measured by flow-type respirometry. In general, the values of the four indicators (swimming time, the number of turns, movement number, and attack number) for the STFD group were significantly higher than those for the control and LTFD group during the same period of rearing. In a subsequent personality assessment, the STFD group was observed to be significantly bolder in an assessment measuring boldness than the control and LTFD group (indicated by time in the circle, swimming time, number of times through the circle, and frequency in the circle). The LTFD group was observed to be more exploratory in the assessment of neophobia (indicated by duration in the exploratory area, distance from novelty item, and frequency of stay in the exploratory area). Indeed, the LTFD group was observed to be significantly less aggressive in the assessment of aggressiveness than the control and STFD group (indicated by attack number, attack range frequency, first attack, and winner). SMR was noted to be significantly higher in the STFD group than in the control and LTFD group. In conclusion, this study firstly reported the effects of food deprivation duration on the personalities of black rockfish, as well as the behavioral and physiological mechanisms. Thus, we hope to provide insights into the work of stock enhancement.

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Multiple paternity in a natural population of a salamander with long-term sperm storage

Molecular Ecology ◽

10.1111/j.1365-294x.2005.02539.x ◽

2005 ◽

Vol 14 (6) ◽

pp. 1803-1810 ◽

Cited By ~ 49

Author(s):

ERIKA M. ADAMS ◽

ADAM G. JONES ◽

STEVAN J. ARNOLD

Keyword(s):

Natural Population ◽

Multiple Paternity ◽

Sperm Storage

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Patterns of sperm use in two populations of Red-sided Garter Snake (Thamnophis sirtalis parietalis) with long-term female sperm storage

Canadian Journal of Zoology ◽

10.1139/cjz-2013-0195 ◽

2014 ◽

Vol 92 (1) ◽

pp. 33-40 ◽

Cited By ~ 16

Author(s):

Christopher R. Friesen ◽

Robert T. Mason ◽

Stevan J. Arnold ◽

Suzanne Estes

Keyword(s):

Multiple Paternity ◽

Sperm Storage ◽

Female Reproductive Tract ◽

High Rate ◽

Order Effects ◽

Thamnophis Sirtalis ◽

Sperm Precedence ◽

Experimental Population ◽

Thamnophis Sirtalis Parietalis

Long-term sperm storage may contribute to postcopulatory sexual selection because it enhances the commingling of sperm from different males within the female reproductive tract, which is the prerequisite for sperm competition. Long-term sperm storage and multiple paternity has been documented in snakes, but the identity of the last potential father is usually unknown in studies demonstrating multiple paternity. Here we present the first study in Red-sided Garter Snakes (Thamnophis sirtalis parietalis (Say in James, 1832)) to use experimental population crosses to assess stored sperm usage, mate-order effects, and the potential for interpopulational gametic isolation. We found a high rate of multiple paternity indicative of ubiquitous long-term sperm storage in this system, and observed last-male sperm precedence in all families (n = 66). Postzygotic isolation was absent, and we observed only a weak asymmetry in pattern of sperm precedence in our population crosses.

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The dynamic sperm storage process in typical viviparous teleost black rockfish, Sebastes schlegelii: evidences of sperm maturation, migration, localization before and after copulation

Theriogenology ◽

10.1016/j.theriogenology.2021.01.001 ◽

2021 ◽

Author(s):

Haixiao Zhao ◽

Xueying Wang ◽

Tengfei Du ◽

Guang Gao ◽

Lele Wu ◽

...

Keyword(s):

Sperm Storage ◽

Sperm Maturation ◽

Storage Process ◽

Black Rockfish ◽

Sebastes Schlegelii ◽

Before And After

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Metabolic syndrome: Epidemiology, diagnostic criteria, racial characteristics

Acta biomedica scientifica ◽

10.29413/abs.2021-6.4.16 ◽

2021 ◽

Vol 6 (4) ◽

pp. 180-191

Author(s):

N. I. Vilson ◽

L. V. Belenkaya ◽

L. F. Sholokhov ◽

I. A. Igumnov ◽

Ya. G. Nadelyaeva ◽

...

Keyword(s):

Metabolic Syndrome ◽

Risk Factor ◽

Clinical Practice ◽

Comparative Analysis ◽

Diagnostic Criteria ◽

Indigenous Population ◽

Pathological Condition ◽

Scientific Databases ◽

Different Populations

Metabolic syndrome (MS) is a very serious pathological condition that occurs in the clinical practice of doctors of various specialties. Often, the presence of MS aggravates the course of comorbidities, while various diseases can serve as a risk factor for its development. The significant prevalence of MS determines the need for its early diagnosis for timely correction and prevention of its long-term complications.The aim. To systematize data on the prevalence of metabolic syndrome in various countries and populations and to discuss the most frequently used diagnostic criteria, including racially and ethnically differentiated ones.Materials and method. A literary search was carried out using scientific databases: eLIBRARY, PubMed.NCBI, CyberLeninka, the official website of IDF for the period from 1999 to 2020.Results. It was found that despite different diagnostic criteria used for MS, its prevalence in many countries is comparable (10–30 %) but differs in different populations. Thus, MS occurs more often in Caucasians than among Asians, and its prevalence is significantly higher in the newcomer vs the indigenous population. Nevertheless, a comparative analysis of the frequency of MS is difficult due to the use of research results based on different approaches to its diagnosis in the literature presented in the literature. Although the analysis of literature data indicates the existence of specific features of the prevalence of MS in different populations, the differentiated approaches to detecting MS depending on the race of patients, which are necessary for many countries, have not yet been sufficiently developed.

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Changes in Aggressive Behavior, Cortisol and Brain Monoamines during the Formation of Social Hierarchy in Black Rockfish (Sebastes schlegelii)

Animals ◽

10.3390/ani10122357 ◽

2020 ◽

Vol 10 (12) ◽

pp. 2357

Author(s):

Xiuwen Xu ◽

Zonghang Zhang ◽

Haoyu Guo ◽

Jianguang Qin ◽

Xiumei Zhang

Keyword(s):

Aggressive Behavior ◽

Growth Performance ◽

Cortisol Level ◽

Social Hierarchy ◽

Fish Behavior ◽

Short Term ◽

Black Rockfish ◽

Serotonergic Activity ◽

Sebastes Schlegelii

Aggressive interactions can lead to a social hierarchy and influence the responses of animal behavior and physiology. However, our understanding on the changes of fish behavior and physiology during the process of social hierarchical formation is limited. To explore the responses of fish behavior and physiology to social hierarchy, we examined the differences in the growth performance, aggression, cortisol level, brain serotonergic activity, and brain dopamine activity between the dominant individuals and the subordinate individuals of black rockfish (Sebastes schlegelii) in two time scenarios. In the short-term contest, the cortisol level and the ratio of telencephalic 5-hydroxyindoleacetic acid (5-HIAA)/5-hydroxytryptamine (5-HT) was significantly higher in subordinate individuals than in dominant individuals. In the long-term contest, the ratios of 5-HIAA/5-HT in all brain regions were significantly higher, and the frequency of aggressive acts were significantly lower in subordinate individuals than in dominant individuals. In contrast, no difference was detected in growth performance. Significant positive correlations between the cortisol level and serotonergic activity were observed in the short-term contest, but the serotonergic activity was negatively correlated with the aggressive behavior in the long-term contest. These results suggest that subordinate hierarchy inhibits aggression but does not impact growth in black rockfish. The cortisol-related change in brain monoaminergic activity could be a potential indicator to predict aggressive behavior in black rockfish in captivity with an obvious social hierarchy.

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