| 来源类型 | Monograph (IIASA Interim Report) |
| 规范类型 | 报告 |
| Secondary sexual characteristics in codfishes (Gadidae) in relation to sound production, habitat use, and social behaviour. | |
| Skjaeraasen JE; Meager JJ; Heino M | |
| 发表日期 | 2012 |
| 出版者 | IIASA, Laxenburg, Austria: IR-12-071 |
| 出版年 | 2012 |
| 语种 | 英语 |
| 摘要 | Little is known about the reproductive biology of the codfishes (Gadidae). Lacking direct observations, the study of secondary sexual characteristics can provide cues to their reproductive biology and behaviour. We reviewed here published accounts on sexual dimorphisms in 25 gadids in light of their general lifestyle, i.e. pelagic or demersal, and social behaviour. In addition, complementary data on fin lengths and drumming muscle size in haddock (Melanogrammus aeglefinus), saithe (Pollachius virens), blue whiting (Micromesistius potassou) and cod (Gadus morhua) are presented. Capacity for sound production occurred in almost half of the studied species, but was most prevalent in demersal species, where it is probably used in resource contests and to attract mates. For semi-pelagic gadids, we postulate that sound production may be linked to the formation of male-biased spawning shoals and the attraction of females towards such shoals; we identify candidate species to further test this hypothesis. Though rarely studied, sexual fin dimorphisms occur in several gadids. Cod, saithe and blue whiting males have longer pelvic fins than females, whereas no such dimorphism was observed in haddock. In cod and haddock, males use pelvic fins during courtship of females and agonistic encounters with other males. Pelvic fins probably have a similar function also in other gadids. The hitherto available information on sexually dimorphic traits and/or courtship behaviour in 7 gadid species suggests that complex mating systems and non-random mate choice occurs frequently in this important group of exploited fishes. |
| 主题 | Evolution and Ecology (EEP) |
| URL | http://pure.iiasa.ac.at/id/eprint/10208/ |
| 来源智库 | International Institute for Applied Systems Analysis (Austria) |
| 资源类型 | 智库出版物 |
| 条目标识符 | http://119.78.100.153/handle/2XGU8XDN/125848 |
| 推荐引用方式 GB/T 7714 | Skjaeraasen JE,Meager JJ,Heino M. Secondary sexual characteristics in codfishes (Gadidae) in relation to sound production, habitat use, and social behaviour.. 2012. |
| 条目包含的文件 | ||||||
| 文件名称/大小 | 资源类型 | 版本类型 | 开放类型 | 使用许可 | ||
| IR-12-071.pdf（178KB） | 智库出版物 | 限制开放 | CC BY-NC-SA | 浏览 | ||
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