First observation of the mating, egg‐laying and hatching behaviour of a captive female Kong skate, Okamejei kenojei (Müller & Henle, 1841)

Autor: Guang Gao, Zhizhong Xiao, Guanglei Ji, Yongshuang Xiao, Daoyuan Ma, Jun Li
Rok vydání: 2022
Předmět:
Zdroj: Journal of Fish Biology. 101:1084-1091
ISSN: 1095-8649
0022-1112
DOI: 10.1111/jfb.15165
Popis: This study provides a novel record of the reproductive behaviour of the Kong skate (Okamejei kenojei) in captivity. These skates were found to mate and deposit eggs at a temperature of 16.5 ± 0.5°C. The results showed that 76.13% of the eggs possessed one yolk, 0.77% of the eggs possessed two yolks and 23.11% of the eggs had no yolk (N = 1043). The deposition of non-yolk and double-yolk eggs was random. A total of 100 eggs were collected. After nearly 92 ± 5 days of incubation, 28 eggs failed to hatch, and 72 skates were successfully hatched with a female-to-male ratio of 1:1 (P 0.05). The results enrich our knowledge of the reproduction in cartilaginous fishes and can inform management and conservation strategies for this species.
Databáze: OpenAIRE
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