Diel spawning periodicity of red snapper Lutjanus campechanus in the northern Gulf of Mexico
| Autor: | D. L. Nieland, M. W. Jackson, James H. Cowan |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Lutjanus erythropterus
urogenital system media_common.quotation_subject fungi Zoology Lutjanus campechanus Aquatic Science Biology Oocyte biology.organism_classification food.food Fishery Lunar Cycle medicine.anatomical_structure food Lutjanidae medicine Reproduction Diel vertical migration Ovulation reproductive and urinary physiology Ecology Evolution Behavior and Systematics media_common |
| Zdroj: | Journal of Fish Biology. 68:695-706 |
| ISSN: | 1095-8649 0022-1112 |
| DOI: | 10.1111/j.0022-1112.2006.00951.x |
| Popis: | Ovaries of red snapper Lutjanus campechanus were examined histologically to determine rates of oocyte maturation, diel spawning periodicity and whether lunar cycle influenced spawning rhythm. Hydration of red snapper oocytes began during the mid-morning hours; c. 5 h was necessary for oocytes to become fully hydrated and ovulation occurred no more than 5 h after oocytes attained full hydration. Appearance of fresh postovulatory follicles after 1330 hours and the absence of hydrated oocytes after 1830 hours signified that red snapper spawning occurred during this 5 h period. In addition, evidence of a peak in spawning was seen near 1600 hours. Postovulatory follicles degenerated within a 24 h time period. A lunar spawning cycle was not evident. |
| Databáze: | OpenAIRE |
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