Geographic variation in the sex ratio, sex specific size, and age structure of Plectropomus leopardus (Serranidae) between reefs open and closed to fishing on the Great Barrier Reef
Geographic variation in the sex ratio, sex specific size, and age structure of Plectropomus leopardus (Serranidae) between reefs open and closed to fishing on the Great Barrier Reef
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DOI：
10.1139/cjfas-57-7-1448
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发表时间：
2000-07-01
影响因子：
2.4
通讯作者：
Davies, CR
中科院分区：
文献类型：
--
作者：
Adams, S;Mapstone, BD;Davies, CR
在澳大利亚大堡礁的两个地理区域（汤斯维尔（19 S）和斯温斯（22 S）），研究了开放和关闭捕鱼的珊瑚礁之间的Plectropomus leopardus种群生殖参数的变化。生殖参数进行了检查，包括操作（生殖）的性别比和大小和年龄结构的成熟女性，性别变化的个人（transitionals），和成熟的男性。在禁渔8-10年的珊瑚礁上，超过最小尺寸和捕捞年龄的雄性比例高于开放捕捞的珊瑚礁，尽管影响因地理区域而异。然而，无论是性别比例，平均年龄，也不平均大小的男性或过渡变化与珊瑚礁关闭状态显着。女性，但是，显着的年龄和较大的封闭比开放的珊瑚礁在这两个地区。显着的区域变化的性别比例和平均年龄的过渡被发现独立的珊瑚礁关闭状态，这表明区域的生殖策略的变化。控制操作，包括广泛的空间尺度，和详细的研究内和种间的变化，在serranid生殖生物学是必要的，以解决这种复杂性的protogynous serranids的捕捞压力和管理策略的反应。
Variation in reproductive parameters of Plectropomus leopardus populations between coral reefs open and closed to fishing was examined in two geographic regions (off Townsville (19S) and in the Swains (22S)) of the Great Barrier Reef, Australia. The reproductive parameters that were examined included the operational (reproductive) sex ratio and size and age structure of mature females, sex-changing individuals (transitionals), and mature males. There was a greater proportion of males above the minimum size and age of harvest on reefs closed to fishing for 8-10 years than on reefs open to fishing, although the effect varied with geographic region. Nevertheless, neither the sex ratio, mean age, nor mean size of males or transitionals varied significantly with reef closure status. Females, however, were significantly older and larger on closed than on open reefs in both regions. Marked regional variations in the sex ratio and average age of transitionals were found independent of reef closure status, suggesting regional variation in reproductive strategies. Controlled manipulations, inclusion of broad spatial scales, and detailed studies of intra- and inter-specific variation in serranid reproductive biology are necessary to resolve such complexities in the responses of protogynous serranids to fishing pressure and management strategies.