Scorpaeniformes are an important component of commercial and recreational fisheries world-wide. The Neosebastes species, found in the western Pacific and south-east Indian Ocean, have received little attention from a research perspective. Samples of the bighead gurnard perch, Neosebastes pandus, collected from the lower west and south coasts of Western Australia, were used to undertake the first comprehensive investigation of the biological characteristics of a Neosebastes species. Opaque zones in sectioned sagittal otoliths were validated as forming annually. Female N. pandus grow to a significantly larger size, on average, than males and dominate the largest size classes, while males, growing to a smaller size, accumulate in the intermediate size classes. Although males were far less numerous than females in those age classes in which both sexes were found, males and females attain similar maximum ages > 25 years. Neosebastes pandus spawns over a brief period between May (austral late autumn) and July (austral mid-autumn) when water temperature and day length are declining. The mean monthly GSI (IGS ) values of females during the spawning period are 37-50 times higher than that of males, which mature at an earlier age and smaller length compared to females. Histological examination of the ovaries of females indicate that their structure is consistent with 'general' teleost ovarian anatomy and thus differs from Scorpaena, Helicolenus and Sebastes species whose ovaries are adapted for specialised reproductive modes. The reproductive strategy of N. pandus of maximising the reproductive output of females, by this sex attaining a larger size than males, and pair spawning (i.e. large disparity in IGS values), demonstrate the close lineage between the Neosebastes and other Scorpaeniformes, such as the Scorpaena, Helicolenus and Sebastes.

中文翻译：

---

蝎形目Neosebastes pandus的生活史特征及两性生长与繁殖策略的关系

蝎形目是世界范围内商业和休闲渔业的重要组成部分。在西太平洋和东南印度洋发现的 Neosebastes 物种从研究的角度很少受到关注。从西澳大利亚下西海岸和南海岸采集的鳙鱼 Neosebastes pandus 的样本被用来对新鲈物种的生物学特性进行首次全面调查。切片矢状耳石中的不透明区被证实为每年形成。平均而言，雌性 N. pandus 长得比雄性大得多，并在最大规格等级中占主导地位，而雄性长至较小规格，则在中等规格等级中积累。尽管在发现两性的年龄组中，男性的数量远少于女性，但男性和女性的最大年龄 > 25 岁。Neosebastes pandus 在 5 月（南方深秋）和 7 月（南方中秋）之间的短暂时间内产卵，当时水温和日长都在下降。产卵期间雌性的月平均 GSI (IGS) 值比雄性高 37-50 倍，与雌性相比，雄性成熟更早，身长更短。对雌性卵巢的组织学检查表明，它们的结构与“一般”硬骨鱼卵巢解剖结构一致，因此不同于卵巢适合特殊生殖模式的蝎子属、Helicolenus 和 Sebastes 物种。N的繁殖策略