Earticle

초록

영어

Behavioral response to a diel photoperiodicity (500 lx for 16 h, 5 lx for 4 h and < 0.5 lx for 4 h) and phototactic characteristics in dark conditions were examined with Siberian sturgeon Acipenser baerii (Chondrostei, Actinopterygii) prelarvae. Siberian sturgeon prelarvae represented both qualitative and quantitative changes in their behavioral patterns according to different light intensities in a diel photoperiodicity. Under daylight conditions (500 lx), prelarvae displayed saltatory changes of behavioral features with ages (Day 0-Day 9) in a general order of swimming-up/drifting, swimming in the upper water column, benthic swimming with rheotaxis, schooling and postschooling behavior. Compared to daylight conditions, prelarvae tended to show more benthic performances and quantitative reductions of schooling and postschooling behaviors under dimlight conditions (5 lx). Under dark conditions (< 0.5 lx), prelarvae exhibited a fairly uniform behavioral pattern characterized by the benthic swimming across the bottom of the tank. From phototaxis tests under dark conditions, navigational responses of prelarvae to a spotlight illumination were quantitatively changed as their ages increased. The phototactic responses reached the peak on Day 2, continued until Day 4, and then gradually decreased until Day 8. A partial recovery of positive phototaxis was observed on Day 9. Data from this study suggest that the diel light cycle as well as the light intensity of each interval in the cycle should be considered as important components of a practical guide for evaluating fitness and developmental states of artificially propagated Siberian sturgeon prelarvae.

목차

ABSTRACT
INTRODUCTION
MATERIALS AND METHODS
Preparation of Siberian sturgeon prelarval samples
Experimental photoperiodicity
Observations of general behavioral patterns in response to a diel light cycle
Quantitative assessments of behavioral patterns
Navigational response to a spotlight illumination under dark conditions
Statistics
RESULTS AND DISCUSSION
Ontogenetic behavioral responses to different illumination intensities in a diel photoperiodicity
Phototactic response to a spotlight under dark conditions
CONFLICTS OF INTEREST
ACKNOWLEDGEMENTS
AUTHOR CONTRIBUTIONS
AUTHOR’S POSITION AND ORCID NO.
REFERENCES

키워드

저자

• Eun Jeong Kim [ Department of Marine Bio-Materials and Aquaculture, Pukyong National University, Busan 48513, Korea ]
• Chulhong Park [ Dinoville Sturgeon Aquafarm, Hamyang 50027, Korea ]
• Yoon Kwon Nam [ Dinoville Sturgeon Aquafarm, Hamyang 50027, Korea ] Corresponding Author

참고문헌

발행기관

간행물

관심저널 등록

• 간행물명

  Journal of Animal Reproduction and Biotechnology

• 간기

  계간

• pISSN

  2671-4639

• eISSN

  2671-4663

• 수록기간

  2019~2026

• 십진분류

  KDC 527 DDC 636